/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/popl20/threaded-sum-3.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-2abb09bbbae98a04ae2fcc735832bfdba44f6fbc-2abb09b [2021-06-05 23:14:44,894 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 23:14:44,895 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 23:14:44,916 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-05 23:14:44,960 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-06-05 23:14:44,960 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-06-05 23:14:44,961 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-06-05 23:14:44,964 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-06-05 23:14:44,992 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 23:14:44,992 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 23:14:44,992 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 23:14:44,992 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 23:14:44,994 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 23:14:44,995 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 23:14:44,995 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 23:14:44,995 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 23:14:44,995 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 23:14:44,995 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 23:14:44,996 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 23:14:44,996 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 23:14:44,996 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 23:14:44,996 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 23:14:44,996 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 23:14:44,996 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 23:14:44,996 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 23:14:44,996 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 23:14:44,997 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 23:14:44,997 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 23:14:44,997 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 23:14:44,997 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 23:14:44,997 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 23:14:44,997 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 23:14:44,997 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 23:14:44,997 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 23:14:44,997 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 23:14:44,998 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 23:14:44,998 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 23:14:44,998 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 23:14:44,998 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 23:14:44,998 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 23:14:45,255 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 23:14:45,271 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 23:14:45,272 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 23:14:45,273 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-05 23:14:45,274 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-05 23:14:45,275 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/threaded-sum-3.wvr.bpl [2021-06-05 23:14:45,275 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/threaded-sum-3.wvr.bpl' [2021-06-05 23:14:45,309 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 23:14:45,311 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-05 23:14:45,311 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 23:14:45,311 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 23:14:45,312 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 23:14:45,320 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "threaded-sum-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 11:14:45" (1/1) ... [2021-06-05 23:14:45,324 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "threaded-sum-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 11:14:45" (1/1) ... [2021-06-05 23:14:45,329 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 23:14:45,330 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 23:14:45,331 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 23:14:45,331 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 23:14:45,336 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "threaded-sum-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 11:14:45" (1/1) ... [2021-06-05 23:14:45,336 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "threaded-sum-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 11:14:45" (1/1) ... [2021-06-05 23:14:45,337 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "threaded-sum-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 11:14:45" (1/1) ... [2021-06-05 23:14:45,337 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "threaded-sum-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 11:14:45" (1/1) ... [2021-06-05 23:14:45,340 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "threaded-sum-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 11:14:45" (1/1) ... [2021-06-05 23:14:45,343 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "threaded-sum-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 11:14:45" (1/1) ... [2021-06-05 23:14:45,344 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "threaded-sum-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 11:14:45" (1/1) ... [2021-06-05 23:14:45,347 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 23:14:45,348 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 23:14:45,348 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 23:14:45,348 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 23:14:45,350 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "threaded-sum-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 11:14:45" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 23:14:45,423 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-05 23:14:45,423 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-05 23:14:45,424 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-05 23:14:45,424 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-05 23:14:45,424 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-05 23:14:45,424 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-05 23:14:45,424 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-05 23:14:45,424 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 23:14:45,424 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 23:14:45,424 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-06-05 23:14:45,425 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-06-05 23:14:45,425 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-06-05 23:14:45,426 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-05 23:14:45,615 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 23:14:45,616 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-05 23:14:45,617 INFO L202 PluginConnector]: Adding new model threaded-sum-3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 11:14:45 BoogieIcfgContainer [2021-06-05 23:14:45,617 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 23:14:45,618 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 23:14:45,618 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 23:14:45,620 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 23:14:45,620 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "threaded-sum-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 11:14:45" (1/2) ... [2021-06-05 23:14:45,621 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15f04cca and model type threaded-sum-3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 11:14:45, skipping insertion in model container [2021-06-05 23:14:45,621 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "threaded-sum-3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 11:14:45" (2/2) ... [2021-06-05 23:14:45,621 INFO L111 eAbstractionObserver]: Analyzing ICFG threaded-sum-3.wvr.bpl [2021-06-05 23:14:45,625 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 23:14:45,625 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 23:14:45,625 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 23:14:45,625 INFO L471 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 23:14:45,677 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-06-05 23:14:45,690 INFO L255 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-06-05 23:14:45,701 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 23:14:45,702 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 23:14:45,702 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 23:14:45,702 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 23:14:45,702 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 23:14:45,702 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 23:14:45,702 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 23:14:45,702 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-05 23:14:45,708 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 40 places, 33 transitions, 90 flow [2021-06-05 23:14:45,729 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 138 states, 136 states have (on average 2.786764705882353) internal successors, (379), 137 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:14:45,731 INFO L276 IsEmpty]: Start isEmpty. Operand has 138 states, 136 states have (on average 2.786764705882353) internal successors, (379), 137 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:14:45,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 23:14:45,738 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:14:45,738 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:14:45,738 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:14:45,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:14:45,742 INFO L82 PathProgramCache]: Analyzing trace with hash 1198606410, now seen corresponding path program 1 times [2021-06-05 23:14:45,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:14:45,747 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439312020] [2021-06-05 23:14:45,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:14:45,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:14:45,832 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:14:45,833 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:14:45,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439312020] [2021-06-05 23:14:45,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [439312020] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 23:14:45,834 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 23:14:45,834 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 23:14:45,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357477073] [2021-06-05 23:14:45,836 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 23:14:45,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:14:45,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 23:14:45,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 23:14:45,846 INFO L87 Difference]: Start difference. First operand has 138 states, 136 states have (on average 2.786764705882353) internal successors, (379), 137 states have internal predecessors, (379), 0 states have call successors, (0), 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 4 states, 4 states have (on average 5.25) internal successors, (21), 4 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) [2021-06-05 23:14:45,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:14:45,898 INFO L93 Difference]: Finished difference Result 186 states and 525 transitions. [2021-06-05 23:14:45,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 23:14:45,899 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 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 21 [2021-06-05 23:14:45,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:14:45,907 INFO L225 Difference]: With dead ends: 186 [2021-06-05 23:14:45,907 INFO L226 Difference]: Without dead ends: 186 [2021-06-05 23:14:45,908 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.1ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 23:14:45,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2021-06-05 23:14:45,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 161. [2021-06-05 23:14:45,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 2.81875) internal successors, (451), 160 states have internal predecessors, (451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:14:45,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 451 transitions. [2021-06-05 23:14:45,944 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 451 transitions. Word has length 21 [2021-06-05 23:14:45,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:14:45,945 INFO L482 AbstractCegarLoop]: Abstraction has 161 states and 451 transitions. [2021-06-05 23:14:45,945 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 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) [2021-06-05 23:14:45,945 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 451 transitions. [2021-06-05 23:14:45,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 23:14:45,946 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:14:45,946 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:14:45,946 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 23:14:45,947 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:14:45,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:14:45,947 INFO L82 PathProgramCache]: Analyzing trace with hash -30759958, now seen corresponding path program 1 times [2021-06-05 23:14:45,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:14:45,947 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630086902] [2021-06-05 23:14:45,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:14:45,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:14:45,973 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:14:45,973 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:14:45,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630086902] [2021-06-05 23:14:45,974 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630086902] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 23:14:45,974 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 23:14:45,974 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 23:14:45,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140125928] [2021-06-05 23:14:45,975 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 23:14:45,975 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:14:45,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 23:14:45,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 23:14:45,976 INFO L87 Difference]: Start difference. First operand 161 states and 451 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:14:46,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:14:46,017 INFO L93 Difference]: Finished difference Result 151 states and 403 transitions. [2021-06-05 23:14:46,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 23:14:46,017 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 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 23 [2021-06-05 23:14:46,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:14:46,019 INFO L225 Difference]: With dead ends: 151 [2021-06-05 23:14:46,019 INFO L226 Difference]: Without dead ends: 151 [2021-06-05 23:14:46,019 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.5ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 23:14:46,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-06-05 23:14:46,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2021-06-05 23:14:46,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 2.6866666666666665) internal successors, (403), 150 states have internal predecessors, (403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:14:46,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 403 transitions. [2021-06-05 23:14:46,030 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 403 transitions. Word has length 23 [2021-06-05 23:14:46,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:14:46,030 INFO L482 AbstractCegarLoop]: Abstraction has 151 states and 403 transitions. [2021-06-05 23:14:46,030 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:14:46,031 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 403 transitions. [2021-06-05 23:14:46,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 23:14:46,032 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:14:46,032 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:14:46,032 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-05 23:14:46,032 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:14:46,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:14:46,033 INFO L82 PathProgramCache]: Analyzing trace with hash 635090215, now seen corresponding path program 1 times [2021-06-05 23:14:46,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:14:46,033 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143285638] [2021-06-05 23:14:46,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:14:46,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:14:46,065 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:14:46,066 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:14:46,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143285638] [2021-06-05 23:14:46,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143285638] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 23:14:46,066 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 23:14:46,066 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 23:14:46,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627498973] [2021-06-05 23:14:46,067 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 23:14:46,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:14:46,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 23:14:46,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-05 23:14:46,068 INFO L87 Difference]: Start difference. First operand 151 states and 403 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:14:46,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:14:46,121 INFO L93 Difference]: Finished difference Result 223 states and 619 transitions. [2021-06-05 23:14:46,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 23:14:46,122 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 23:14:46,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:14:46,125 INFO L225 Difference]: With dead ends: 223 [2021-06-05 23:14:46,128 INFO L226 Difference]: Without dead ends: 223 [2021-06-05 23:14:46,128 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.2ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 23:14:46,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2021-06-05 23:14:46,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 223. [2021-06-05 23:14:46,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 222 states have (on average 2.7882882882882885) internal successors, (619), 222 states have internal predecessors, (619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:14:46,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 619 transitions. [2021-06-05 23:14:46,153 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 619 transitions. Word has length 26 [2021-06-05 23:14:46,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:14:46,154 INFO L482 AbstractCegarLoop]: Abstraction has 223 states and 619 transitions. [2021-06-05 23:14:46,154 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:14:46,154 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 619 transitions. [2021-06-05 23:14:46,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 23:14:46,155 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:14:46,155 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:14:46,156 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-05 23:14:46,156 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:14:46,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:14:46,156 INFO L82 PathProgramCache]: Analyzing trace with hash 1690862269, now seen corresponding path program 1 times [2021-06-05 23:14:46,156 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:14:46,156 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668912675] [2021-06-05 23:14:46,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:14:46,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:14:46,207 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 23:14:46,207 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:14:46,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668912675] [2021-06-05 23:14:46,207 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668912675] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 23:14:46,208 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 23:14:46,208 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 23:14:46,209 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685433100] [2021-06-05 23:14:46,210 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 23:14:46,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:14:46,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 23:14:46,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-05 23:14:46,212 INFO L87 Difference]: Start difference. First operand 223 states and 619 transitions. Second operand has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:14:46,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:14:46,248 INFO L93 Difference]: Finished difference Result 344 states and 930 transitions. [2021-06-05 23:14:46,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 23:14:46,249 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 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 28 [2021-06-05 23:14:46,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:14:46,252 INFO L225 Difference]: With dead ends: 344 [2021-06-05 23:14:46,252 INFO L226 Difference]: Without dead ends: 308 [2021-06-05 23:14:46,252 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 20.0ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 23:14:46,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2021-06-05 23:14:46,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 235. [2021-06-05 23:14:46,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 234 states have (on average 2.8076923076923075) internal successors, (657), 234 states have internal predecessors, (657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:14:46,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 657 transitions. [2021-06-05 23:14:46,269 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 657 transitions. Word has length 28 [2021-06-05 23:14:46,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:14:46,269 INFO L482 AbstractCegarLoop]: Abstraction has 235 states and 657 transitions. [2021-06-05 23:14:46,269 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:14:46,269 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 657 transitions. [2021-06-05 23:14:46,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:14:46,270 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:14:46,271 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:14:46,271 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-05 23:14:46,271 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:14:46,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:14:46,271 INFO L82 PathProgramCache]: Analyzing trace with hash 451315555, now seen corresponding path program 2 times [2021-06-05 23:14:46,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:14:46,271 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4964966] [2021-06-05 23:14:46,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:14:46,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:14:46,342 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:14:46,342 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:14:46,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4964966] [2021-06-05 23:14:46,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4964966] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:14:46,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [830606078] [2021-06-05 23:14:46,342 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 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:14:46,381 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:14:46,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:14:46,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 23:14:46,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:14:46,653 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:14:46,654 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [830606078] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:14:46,654 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:14:46,654 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 23:14:46,654 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092879861] [2021-06-05 23:14:46,654 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 23:14:46,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:14:46,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 23:14:46,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-06-05 23:14:46,655 INFO L87 Difference]: Start difference. First operand 235 states and 657 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:14:47,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:14:47,220 INFO L93 Difference]: Finished difference Result 545 states and 1518 transitions. [2021-06-05 23:14:47,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 23:14:47,221 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:14:47,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:14:47,223 INFO L225 Difference]: With dead ends: 545 [2021-06-05 23:14:47,223 INFO L226 Difference]: Without dead ends: 545 [2021-06-05 23:14:47,224 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 418.4ms TimeCoverageRelationStatistics Valid=262, Invalid=730, Unknown=0, NotChecked=0, Total=992 [2021-06-05 23:14:47,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 545 states. [2021-06-05 23:14:47,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 545 to 312. [2021-06-05 23:14:47,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 311 states have (on average 2.9485530546623795) internal successors, (917), 311 states have internal predecessors, (917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:14:47,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 917 transitions. [2021-06-05 23:14:47,234 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 917 transitions. Word has length 30 [2021-06-05 23:14:47,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:14:47,234 INFO L482 AbstractCegarLoop]: Abstraction has 312 states and 917 transitions. [2021-06-05 23:14:47,234 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:14:47,235 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 917 transitions. [2021-06-05 23:14:47,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:14:47,236 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:14:47,236 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:14:47,450 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:14:47,451 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:14:47,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:14:47,451 INFO L82 PathProgramCache]: Analyzing trace with hash 564518119, now seen corresponding path program 3 times [2021-06-05 23:14:47,451 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:14:47,451 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325897218] [2021-06-05 23:14:47,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:14:47,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:14:47,532 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:14:47,532 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:14:47,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325897218] [2021-06-05 23:14:47,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325897218] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:14:47,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1441157062] [2021-06-05 23:14:47,533 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 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:14:47,587 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 23:14:47,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:14:47,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 23:14:47,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:14:47,778 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:14:47,778 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1441157062] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:14:47,779 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:14:47,779 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 23:14:47,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127589898] [2021-06-05 23:14:47,779 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 23:14:47,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:14:47,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 23:14:47,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-06-05 23:14:47,780 INFO L87 Difference]: Start difference. First operand 312 states and 917 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:14:48,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:14:48,382 INFO L93 Difference]: Finished difference Result 874 states and 2542 transitions. [2021-06-05 23:14:48,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 23:14:48,384 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:14:48,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:14:48,388 INFO L225 Difference]: With dead ends: 874 [2021-06-05 23:14:48,388 INFO L226 Difference]: Without dead ends: 874 [2021-06-05 23:14:48,388 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 364 ImplicationChecksByTransitivity, 490.8ms TimeCoverageRelationStatistics Valid=387, Invalid=1019, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 23:14:48,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 874 states. [2021-06-05 23:14:48,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 874 to 392. [2021-06-05 23:14:48,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 392 states, 391 states have (on average 3.0051150895140664) internal successors, (1175), 391 states have internal predecessors, (1175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:14:48,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 1175 transitions. [2021-06-05 23:14:48,401 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 1175 transitions. Word has length 30 [2021-06-05 23:14:48,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:14:48,402 INFO L482 AbstractCegarLoop]: Abstraction has 392 states and 1175 transitions. [2021-06-05 23:14:48,402 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:14:48,402 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 1175 transitions. [2021-06-05 23:14:48,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:14:48,403 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:14:48,403 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:14:48,621 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-06-05 23:14:48,622 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:14:48,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:14:48,622 INFO L82 PathProgramCache]: Analyzing trace with hash 743116131, now seen corresponding path program 4 times [2021-06-05 23:14:48,623 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:14:48,623 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110941233] [2021-06-05 23:14:48,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:14:48,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:14:48,693 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:14:48,694 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:14:48,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110941233] [2021-06-05 23:14:48,694 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110941233] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:14:48,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921463246] [2021-06-05 23:14:48,694 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 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:14:48,741 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:14:48,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:14:48,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 23:14:48,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:14:48,796 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:14:48,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [921463246] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:14:48,797 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:14:48,797 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-05 23:14:48,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930200970] [2021-06-05 23:14:48,797 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 23:14:48,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:14:48,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 23:14:48,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-06-05 23:14:48,798 INFO L87 Difference]: Start difference. First operand 392 states and 1175 transitions. Second operand has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:14:48,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:14:48,939 INFO L93 Difference]: Finished difference Result 800 states and 2390 transitions. [2021-06-05 23:14:48,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 23:14:48,939 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:14:48,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:14:48,943 INFO L225 Difference]: With dead ends: 800 [2021-06-05 23:14:48,943 INFO L226 Difference]: Without dead ends: 800 [2021-06-05 23:14:48,944 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 113.8ms TimeCoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2021-06-05 23:14:48,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 800 states. [2021-06-05 23:14:48,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 800 to 521. [2021-06-05 23:14:48,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 521 states, 520 states have (on average 3.1134615384615385) internal successors, (1619), 520 states have internal predecessors, (1619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:14:48,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 521 states to 521 states and 1619 transitions. [2021-06-05 23:14:48,958 INFO L78 Accepts]: Start accepts. Automaton has 521 states and 1619 transitions. Word has length 30 [2021-06-05 23:14:48,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:14:48,959 INFO L482 AbstractCegarLoop]: Abstraction has 521 states and 1619 transitions. [2021-06-05 23:14:48,959 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:14:48,959 INFO L276 IsEmpty]: Start isEmpty. Operand 521 states and 1619 transitions. [2021-06-05 23:14:48,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:14:48,960 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:14:48,960 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:14:49,176 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-06-05 23:14:49,177 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:14:49,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:14:49,177 INFO L82 PathProgramCache]: Analyzing trace with hash -1461330985, now seen corresponding path program 5 times [2021-06-05 23:14:49,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:14:49,177 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684075380] [2021-06-05 23:14:49,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:14:49,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:14:49,260 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:14:49,262 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:14:49,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684075380] [2021-06-05 23:14:49,262 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684075380] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:14:49,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1913521089] [2021-06-05 23:14:49,262 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 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:14:49,294 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 23:14:49,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:14:49,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 23:14:49,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:14:49,439 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:14:49,440 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1913521089] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:14:49,440 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:14:49,440 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-06-05 23:14:49,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767752566] [2021-06-05 23:14:49,440 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 23:14:49,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:14:49,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 23:14:49,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-06-05 23:14:49,441 INFO L87 Difference]: Start difference. First operand 521 states and 1619 transitions. Second operand has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:14:50,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:14:50,179 INFO L93 Difference]: Finished difference Result 2062 states and 6284 transitions. [2021-06-05 23:14:50,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 23:14:50,179 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:14:50,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:14:50,186 INFO L225 Difference]: With dead ends: 2062 [2021-06-05 23:14:50,186 INFO L226 Difference]: Without dead ends: 2062 [2021-06-05 23:14:50,187 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 584 ImplicationChecksByTransitivity, 605.4ms TimeCoverageRelationStatistics Valid=593, Invalid=1569, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 23:14:50,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2062 states. [2021-06-05 23:14:50,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2062 to 1269. [2021-06-05 23:14:50,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1269 states, 1268 states have (on average 3.1553627760252367) internal successors, (4001), 1268 states have internal predecessors, (4001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:14:50,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1269 states to 1269 states and 4001 transitions. [2021-06-05 23:14:50,219 INFO L78 Accepts]: Start accepts. Automaton has 1269 states and 4001 transitions. Word has length 30 [2021-06-05 23:14:50,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:14:50,219 INFO L482 AbstractCegarLoop]: Abstraction has 1269 states and 4001 transitions. [2021-06-05 23:14:50,219 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:14:50,219 INFO L276 IsEmpty]: Start isEmpty. Operand 1269 states and 4001 transitions. [2021-06-05 23:14:50,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:14:50,222 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:14:50,222 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:14:50,437 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:14:50,437 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:14:50,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:14:50,437 INFO L82 PathProgramCache]: Analyzing trace with hash 1450700455, now seen corresponding path program 6 times [2021-06-05 23:14:50,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:14:50,438 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667749941] [2021-06-05 23:14:50,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:14:50,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:14:50,518 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:14:50,518 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:14:50,518 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667749941] [2021-06-05 23:14:50,518 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667749941] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:14:50,518 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1616149190] [2021-06-05 23:14:50,518 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 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:14:50,545 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 23:14:50,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:14:50,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 23:14:50,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:14:50,603 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:14:50,603 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1616149190] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:14:50,603 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:14:50,603 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-05 23:14:50,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79718665] [2021-06-05 23:14:50,604 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 23:14:50,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:14:50,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 23:14:50,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-06-05 23:14:50,605 INFO L87 Difference]: Start difference. First operand 1269 states and 4001 transitions. Second operand has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:14:50,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:14:50,734 INFO L93 Difference]: Finished difference Result 1797 states and 5545 transitions. [2021-06-05 23:14:50,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 23:14:50,735 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:14:50,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:14:50,741 INFO L225 Difference]: With dead ends: 1797 [2021-06-05 23:14:50,741 INFO L226 Difference]: Without dead ends: 1797 [2021-06-05 23:14:50,741 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 98.8ms TimeCoverageRelationStatistics Valid=93, Invalid=179, Unknown=0, NotChecked=0, Total=272 [2021-06-05 23:14:50,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1797 states. [2021-06-05 23:14:50,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1797 to 1209. [2021-06-05 23:14:50,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1209 states, 1208 states have (on average 3.138245033112583) internal successors, (3791), 1208 states have internal predecessors, (3791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:14:50,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1209 states to 1209 states and 3791 transitions. [2021-06-05 23:14:50,767 INFO L78 Accepts]: Start accepts. Automaton has 1209 states and 3791 transitions. Word has length 30 [2021-06-05 23:14:50,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:14:50,767 INFO L482 AbstractCegarLoop]: Abstraction has 1209 states and 3791 transitions. [2021-06-05 23:14:50,767 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:14:50,767 INFO L276 IsEmpty]: Start isEmpty. Operand 1209 states and 3791 transitions. [2021-06-05 23:14:50,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:14:50,770 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:14:50,770 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:14:50,985 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-06-05 23:14:50,985 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:14:50,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:14:50,985 INFO L82 PathProgramCache]: Analyzing trace with hash -1660018845, now seen corresponding path program 7 times [2021-06-05 23:14:50,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:14:50,986 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599760192] [2021-06-05 23:14:50,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:14:51,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:14:51,057 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:14:51,057 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:14:51,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599760192] [2021-06-05 23:14:51,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599760192] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:14:51,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2130611795] [2021-06-05 23:14:51,057 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:14:51,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:14:51,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 23:14:51,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:14:51,144 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:14:51,144 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2130611795] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:14:51,144 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:14:51,145 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-05 23:14:51,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555573909] [2021-06-05 23:14:51,146 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 23:14:51,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:14:51,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 23:14:51,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-06-05 23:14:51,147 INFO L87 Difference]: Start difference. First operand 1209 states and 3791 transitions. Second operand has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:14:51,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:14:51,250 INFO L93 Difference]: Finished difference Result 2345 states and 7301 transitions. [2021-06-05 23:14:51,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 23:14:51,251 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:14:51,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:14:51,258 INFO L225 Difference]: With dead ends: 2345 [2021-06-05 23:14:51,259 INFO L226 Difference]: Without dead ends: 2345 [2021-06-05 23:14:51,259 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 77.3ms TimeCoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2021-06-05 23:14:51,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2345 states. [2021-06-05 23:14:51,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2345 to 1749. [2021-06-05 23:14:51,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1749 states, 1748 states have (on average 3.230549199084668) internal successors, (5647), 1748 states have internal predecessors, (5647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:14:51,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1749 states to 1749 states and 5647 transitions. [2021-06-05 23:14:51,295 INFO L78 Accepts]: Start accepts. Automaton has 1749 states and 5647 transitions. Word has length 30 [2021-06-05 23:14:51,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:14:51,295 INFO L482 AbstractCegarLoop]: Abstraction has 1749 states and 5647 transitions. [2021-06-05 23:14:51,295 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:14:51,296 INFO L276 IsEmpty]: Start isEmpty. Operand 1749 states and 5647 transitions. [2021-06-05 23:14:51,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 23:14:51,299 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:14:51,299 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:14:51,507 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:14:51,507 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:14:51,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:14:51,507 INFO L82 PathProgramCache]: Analyzing trace with hash 125703753, now seen corresponding path program 8 times [2021-06-05 23:14:51,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:14:51,507 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914306512] [2021-06-05 23:14:51,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:14:51,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:14:51,586 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:14:51,586 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:14:51,586 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914306512] [2021-06-05 23:14:51,586 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914306512] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:14:51,586 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [837951879] [2021-06-05 23:14:51,586 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:14:51,609 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:14:51,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:14:51,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 23:14:51,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:14:51,789 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:14:51,790 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [837951879] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:14:51,790 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:14:51,790 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 17 [2021-06-05 23:14:51,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731464620] [2021-06-05 23:14:51,790 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 23:14:51,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:14:51,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 23:14:51,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-06-05 23:14:51,791 INFO L87 Difference]: Start difference. First operand 1749 states and 5647 transitions. Second operand has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:14:52,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:14:52,201 INFO L93 Difference]: Finished difference Result 2383 states and 7508 transitions. [2021-06-05 23:14:52,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 23:14:52,202 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 23:14:52,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:14:52,209 INFO L225 Difference]: With dead ends: 2383 [2021-06-05 23:14:52,209 INFO L226 Difference]: Without dead ends: 2383 [2021-06-05 23:14:52,210 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 367.9ms TimeCoverageRelationStatistics Valid=303, Invalid=753, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 23:14:52,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2383 states. [2021-06-05 23:14:52,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2383 to 1915. [2021-06-05 23:14:52,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1915 states, 1914 states have (on average 3.239811912225705) internal successors, (6201), 1914 states have internal predecessors, (6201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:14:52,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1915 states to 1915 states and 6201 transitions. [2021-06-05 23:14:52,248 INFO L78 Accepts]: Start accepts. Automaton has 1915 states and 6201 transitions. Word has length 32 [2021-06-05 23:14:52,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:14:52,248 INFO L482 AbstractCegarLoop]: Abstraction has 1915 states and 6201 transitions. [2021-06-05 23:14:52,248 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:14:52,248 INFO L276 IsEmpty]: Start isEmpty. Operand 1915 states and 6201 transitions. [2021-06-05 23:14:52,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 23:14:52,251 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:14:52,251 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:14:52,458 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:14:52,458 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:14:52,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:14:52,459 INFO L82 PathProgramCache]: Analyzing trace with hash 47423557, now seen corresponding path program 9 times [2021-06-05 23:14:52,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:14:52,459 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256713852] [2021-06-05 23:14:52,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:14:52,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:14:52,505 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:14:52,505 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:14:52,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256713852] [2021-06-05 23:14:52,505 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256713852] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:14:52,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [53824440] [2021-06-05 23:14:52,505 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:14:52,529 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 23:14:52,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:14:52,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 23:14:52,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:14:52,633 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:14:52,634 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [53824440] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:14:52,634 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:14:52,634 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 23:14:52,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137892286] [2021-06-05 23:14:52,634 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 23:14:52,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:14:52,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 23:14:52,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-05 23:14:52,635 INFO L87 Difference]: Start difference. First operand 1915 states and 6201 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:14:53,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:14:53,182 INFO L93 Difference]: Finished difference Result 3613 states and 11319 transitions. [2021-06-05 23:14:53,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 23:14:53,182 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 23:14:53,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:14:53,194 INFO L225 Difference]: With dead ends: 3613 [2021-06-05 23:14:53,194 INFO L226 Difference]: Without dead ends: 3613 [2021-06-05 23:14:53,194 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 444 ImplicationChecksByTransitivity, 428.9ms TimeCoverageRelationStatistics Valid=501, Invalid=1139, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 23:14:53,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3613 states. [2021-06-05 23:14:53,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3613 to 2052. [2021-06-05 23:14:53,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2052 states, 2051 states have (on average 3.2457337883959045) internal successors, (6657), 2051 states have internal predecessors, (6657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:14:53,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2052 states to 2052 states and 6657 transitions. [2021-06-05 23:14:53,239 INFO L78 Accepts]: Start accepts. Automaton has 2052 states and 6657 transitions. Word has length 32 [2021-06-05 23:14:53,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:14:53,239 INFO L482 AbstractCegarLoop]: Abstraction has 2052 states and 6657 transitions. [2021-06-05 23:14:53,240 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:14:53,240 INFO L276 IsEmpty]: Start isEmpty. Operand 2052 states and 6657 transitions. [2021-06-05 23:14:53,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 23:14:53,243 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:14:53,243 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:14:53,457 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-06-05 23:14:53,457 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:14:53,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:14:53,457 INFO L82 PathProgramCache]: Analyzing trace with hash 1904870325, now seen corresponding path program 10 times [2021-06-05 23:14:53,458 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:14:53,458 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305560857] [2021-06-05 23:14:53,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:14:53,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:14:53,536 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:14:53,536 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:14:53,536 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305560857] [2021-06-05 23:14:53,537 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [305560857] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:14:53,537 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [854410661] [2021-06-05 23:14:53,537 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:14:53,564 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:14:53,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:14:53,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 23:14:53,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:14:53,657 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:14:53,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [854410661] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:14:53,657 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:14:53,657 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 17 [2021-06-05 23:14:53,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390755724] [2021-06-05 23:14:53,658 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 23:14:53,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:14:53,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 23:14:53,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2021-06-05 23:14:53,658 INFO L87 Difference]: Start difference. First operand 2052 states and 6657 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:14:53,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:14:53,996 INFO L93 Difference]: Finished difference Result 4372 states and 13767 transitions. [2021-06-05 23:14:53,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 23:14:53,997 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 23:14:53,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:14:54,010 INFO L225 Difference]: With dead ends: 4372 [2021-06-05 23:14:54,010 INFO L226 Difference]: Without dead ends: 4372 [2021-06-05 23:14:54,011 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 254.6ms TimeCoverageRelationStatistics Valid=253, Invalid=617, Unknown=0, NotChecked=0, Total=870 [2021-06-05 23:14:54,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4372 states. [2021-06-05 23:14:54,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4372 to 3140. [2021-06-05 23:14:54,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3140 states, 3139 states have (on average 3.294361261548264) internal successors, (10341), 3139 states have internal predecessors, (10341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:14:54,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3140 states to 3140 states and 10341 transitions. [2021-06-05 23:14:54,079 INFO L78 Accepts]: Start accepts. Automaton has 3140 states and 10341 transitions. Word has length 32 [2021-06-05 23:14:54,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:14:54,079 INFO L482 AbstractCegarLoop]: Abstraction has 3140 states and 10341 transitions. [2021-06-05 23:14:54,079 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:14:54,079 INFO L276 IsEmpty]: Start isEmpty. Operand 3140 states and 10341 transitions. [2021-06-05 23:14:54,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 23:14:54,084 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:14:54,084 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:14:54,300 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:14:54,300 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:14:54,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:14:54,301 INFO L82 PathProgramCache]: Analyzing trace with hash 1718839609, now seen corresponding path program 11 times [2021-06-05 23:14:54,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:14:54,301 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739432188] [2021-06-05 23:14:54,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:14:54,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:14:54,390 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:14:54,390 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:14:54,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739432188] [2021-06-05 23:14:54,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [739432188] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:14:54,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446971829] [2021-06-05 23:14:54,390 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:14:54,419 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 23:14:54,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:14:54,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 23:14:54,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:14:54,613 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:14:54,613 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [446971829] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:14:54,613 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:14:54,613 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 22 [2021-06-05 23:14:54,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767103742] [2021-06-05 23:14:54,615 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 23:14:54,615 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:14:54,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 23:14:54,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=361, Unknown=0, NotChecked=0, Total=462 [2021-06-05 23:14:54,616 INFO L87 Difference]: Start difference. First operand 3140 states and 10341 transitions. Second operand has 22 states, 22 states have (on average 2.5) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:14:56,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:14:56,007 INFO L93 Difference]: Finished difference Result 9020 states and 28737 transitions. [2021-06-05 23:14:56,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 23:14:56,007 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.5) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 23:14:56,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:14:56,023 INFO L225 Difference]: With dead ends: 9020 [2021-06-05 23:14:56,024 INFO L226 Difference]: Without dead ends: 9020 [2021-06-05 23:14:56,025 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1372 ImplicationChecksByTransitivity, 1047.3ms TimeCoverageRelationStatistics Valid=1159, Invalid=3397, Unknown=0, NotChecked=0, Total=4556 [2021-06-05 23:14:56,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9020 states. [2021-06-05 23:14:56,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9020 to 5832. [2021-06-05 23:14:56,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5832 states, 5831 states have (on average 3.3656319670725434) internal successors, (19625), 5831 states have internal predecessors, (19625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:14:56,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5832 states to 5832 states and 19625 transitions. [2021-06-05 23:14:56,170 INFO L78 Accepts]: Start accepts. Automaton has 5832 states and 19625 transitions. Word has length 32 [2021-06-05 23:14:56,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:14:56,170 INFO L482 AbstractCegarLoop]: Abstraction has 5832 states and 19625 transitions. [2021-06-05 23:14:56,170 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.5) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:14:56,170 INFO L276 IsEmpty]: Start isEmpty. Operand 5832 states and 19625 transitions. [2021-06-05 23:14:56,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 23:14:56,177 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:14:56,177 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:14:56,395 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:14:56,395 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:14:56,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:14:56,396 INFO L82 PathProgramCache]: Analyzing trace with hash -866066123, now seen corresponding path program 12 times [2021-06-05 23:14:56,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:14:56,396 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697952225] [2021-06-05 23:14:56,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:14:56,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:14:56,482 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:14:56,483 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:14:56,483 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697952225] [2021-06-05 23:14:56,483 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [697952225] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:14:56,483 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [165352452] [2021-06-05 23:14:56,483 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:14:56,506 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 23:14:56,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:14:56,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 23:14:56,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:14:56,588 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:14:56,589 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [165352452] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:14:56,589 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:14:56,589 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 17 [2021-06-05 23:14:56,589 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622085542] [2021-06-05 23:14:56,589 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 23:14:56,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:14:56,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 23:14:56,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2021-06-05 23:14:56,590 INFO L87 Difference]: Start difference. First operand 5832 states and 19625 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:14:57,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:14:57,552 INFO L93 Difference]: Finished difference Result 12646 states and 40893 transitions. [2021-06-05 23:14:57,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 23:14:57,552 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 23:14:57,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:14:57,574 INFO L225 Difference]: With dead ends: 12646 [2021-06-05 23:14:57,574 INFO L226 Difference]: Without dead ends: 12646 [2021-06-05 23:14:57,576 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 883 ImplicationChecksByTransitivity, 697.4ms TimeCoverageRelationStatistics Valid=883, Invalid=2087, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 23:14:57,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12646 states. [2021-06-05 23:14:57,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12646 to 6547. [2021-06-05 23:14:57,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6547 states, 6546 states have (on average 3.340360525511763) internal successors, (21866), 6546 states have internal predecessors, (21866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:14:57,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6547 states to 6547 states and 21866 transitions. [2021-06-05 23:14:57,732 INFO L78 Accepts]: Start accepts. Automaton has 6547 states and 21866 transitions. Word has length 32 [2021-06-05 23:14:57,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:14:57,733 INFO L482 AbstractCegarLoop]: Abstraction has 6547 states and 21866 transitions. [2021-06-05 23:14:57,733 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:14:57,733 INFO L276 IsEmpty]: Start isEmpty. Operand 6547 states and 21866 transitions. [2021-06-05 23:14:57,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 23:14:57,740 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:14:57,740 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:14:57,948 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-06-05 23:14:57,949 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:14:57,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:14:57,949 INFO L82 PathProgramCache]: Analyzing trace with hash 1685658193, now seen corresponding path program 13 times [2021-06-05 23:14:57,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:14:57,949 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753237959] [2021-06-05 23:14:57,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:14:57,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:14:58,003 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 23:14:58,004 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:14:58,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753237959] [2021-06-05 23:14:58,004 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753237959] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:14:58,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [854658672] [2021-06-05 23:14:58,004 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:14:58,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:14:58,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 23:14:58,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:14:58,092 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 23:14:58,093 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [854658672] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:14:58,093 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:14:58,093 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-06-05 23:14:58,093 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924794331] [2021-06-05 23:14:58,093 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 23:14:58,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:14:58,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 23:14:58,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-06-05 23:14:58,094 INFO L87 Difference]: Start difference. First operand 6547 states and 21866 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:14:58,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:14:58,186 INFO L93 Difference]: Finished difference Result 8397 states and 27709 transitions. [2021-06-05 23:14:58,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 23:14:58,187 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 23:14:58,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:14:58,202 INFO L225 Difference]: With dead ends: 8397 [2021-06-05 23:14:58,202 INFO L226 Difference]: Without dead ends: 8397 [2021-06-05 23:14:58,202 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 71.4ms TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2021-06-05 23:14:58,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8397 states. [2021-06-05 23:14:58,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8397 to 6574. [2021-06-05 23:14:58,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6574 states, 6573 states have (on average 3.3476342613722805) internal successors, (22004), 6573 states have internal predecessors, (22004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:14:58,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6574 states to 6574 states and 22004 transitions. [2021-06-05 23:14:58,362 INFO L78 Accepts]: Start accepts. Automaton has 6574 states and 22004 transitions. Word has length 32 [2021-06-05 23:14:58,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:14:58,362 INFO L482 AbstractCegarLoop]: Abstraction has 6574 states and 22004 transitions. [2021-06-05 23:14:58,362 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:14:58,362 INFO L276 IsEmpty]: Start isEmpty. Operand 6574 states and 22004 transitions. [2021-06-05 23:14:58,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 23:14:58,371 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:14:58,371 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:14:58,580 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-06-05 23:14:58,581 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:14:58,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:14:58,581 INFO L82 PathProgramCache]: Analyzing trace with hash -626027993, now seen corresponding path program 14 times [2021-06-05 23:14:58,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:14:58,581 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142762292] [2021-06-05 23:14:58,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:14:58,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:14:58,840 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:14:58,841 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:14:58,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142762292] [2021-06-05 23:14:58,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142762292] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:14:58,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138368201] [2021-06-05 23:14:58,841 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:14:58,868 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:14:58,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:14:58,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 23:14:58,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:14:59,444 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:14:59,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [138368201] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:14:59,444 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:14:59,444 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 32 [2021-06-05 23:14:59,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170631134] [2021-06-05 23:14:59,444 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 23:14:59,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:14:59,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 23:14:59,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=901, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 23:14:59,445 INFO L87 Difference]: Start difference. First operand 6574 states and 22004 transitions. Second operand has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:15:01,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:15:01,155 INFO L93 Difference]: Finished difference Result 8244 states and 26601 transitions. [2021-06-05 23:15:01,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 23:15:01,156 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-06-05 23:15:01,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:15:01,173 INFO L225 Difference]: With dead ends: 8244 [2021-06-05 23:15:01,173 INFO L226 Difference]: Without dead ends: 8170 [2021-06-05 23:15:01,174 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 741 ImplicationChecksByTransitivity, 1394.1ms TimeCoverageRelationStatistics Valid=468, Invalid=2612, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 23:15:01,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8170 states. [2021-06-05 23:15:01,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8170 to 6796. [2021-06-05 23:15:01,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6796 states, 6795 states have (on average 3.33495217071376) internal successors, (22661), 6795 states have internal predecessors, (22661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:15:01,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6796 states to 6796 states and 22661 transitions. [2021-06-05 23:15:01,319 INFO L78 Accepts]: Start accepts. Automaton has 6796 states and 22661 transitions. Word has length 34 [2021-06-05 23:15:01,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:15:01,319 INFO L482 AbstractCegarLoop]: Abstraction has 6796 states and 22661 transitions. [2021-06-05 23:15:01,319 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:15:01,319 INFO L276 IsEmpty]: Start isEmpty. Operand 6796 states and 22661 transitions. [2021-06-05 23:15:01,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 23:15:01,327 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:15:01,327 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:15:01,527 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-06-05 23:15:01,527 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:15:01,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:15:01,528 INFO L82 PathProgramCache]: Analyzing trace with hash -66991577, now seen corresponding path program 15 times [2021-06-05 23:15:01,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:15:01,528 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789503064] [2021-06-05 23:15:01,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:15:01,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:15:01,792 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:15:01,792 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:15:01,792 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789503064] [2021-06-05 23:15:01,792 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789503064] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:15:01,792 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1456434672] [2021-06-05 23:15:01,792 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:15:01,816 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 23:15:01,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:15:01,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 23:15:01,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:15:02,382 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:15:02,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1456434672] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:15:02,383 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:15:02,383 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16] total 33 [2021-06-05 23:15:02,383 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850283339] [2021-06-05 23:15:02,383 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 23:15:02,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:15:02,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 23:15:02,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=931, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 23:15:02,384 INFO L87 Difference]: Start difference. First operand 6796 states and 22661 transitions. Second operand has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:15:05,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:15:05,794 INFO L93 Difference]: Finished difference Result 12070 states and 38381 transitions. [2021-06-05 23:15:05,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-06-05 23:15:05,795 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-06-05 23:15:05,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:15:05,822 INFO L225 Difference]: With dead ends: 12070 [2021-06-05 23:15:05,823 INFO L226 Difference]: Without dead ends: 11996 [2021-06-05 23:15:05,824 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2293 ImplicationChecksByTransitivity, 2726.1ms TimeCoverageRelationStatistics Valid=1280, Invalid=6376, Unknown=0, NotChecked=0, Total=7656 [2021-06-05 23:15:05,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11996 states. [2021-06-05 23:15:05,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11996 to 7004. [2021-06-05 23:15:05,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7004 states, 7003 states have (on average 3.3399971440811083) internal successors, (23390), 7003 states have internal predecessors, (23390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:15:05,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7004 states to 7004 states and 23390 transitions. [2021-06-05 23:15:05,976 INFO L78 Accepts]: Start accepts. Automaton has 7004 states and 23390 transitions. Word has length 34 [2021-06-05 23:15:05,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:15:05,976 INFO L482 AbstractCegarLoop]: Abstraction has 7004 states and 23390 transitions. [2021-06-05 23:15:05,976 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:15:05,976 INFO L276 IsEmpty]: Start isEmpty. Operand 7004 states and 23390 transitions. [2021-06-05 23:15:05,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 23:15:05,984 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:15:05,984 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:15:06,200 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:15:06,201 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:15:06,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:15:06,201 INFO L82 PathProgramCache]: Analyzing trace with hash -1955785949, now seen corresponding path program 16 times [2021-06-05 23:15:06,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:15:06,201 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827502501] [2021-06-05 23:15:06,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:15:06,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:15:06,463 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:15:06,464 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:15:06,464 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827502501] [2021-06-05 23:15:06,464 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827502501] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:15:06,464 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [142696127] [2021-06-05 23:15:06,464 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:15:06,487 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:15:06,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:15:06,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 23:15:06,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:15:07,139 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:15:07,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [142696127] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:15:07,139 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:15:07,139 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-06-05 23:15:07,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930790377] [2021-06-05 23:15:07,140 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 23:15:07,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:15:07,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 23:15:07,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=996, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 23:15:07,140 INFO L87 Difference]: Start difference. First operand 7004 states and 23390 transitions. Second operand has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:15:09,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:15:09,232 INFO L93 Difference]: Finished difference Result 13107 states and 41620 transitions. [2021-06-05 23:15:09,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-05 23:15:09,232 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-06-05 23:15:09,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:15:09,256 INFO L225 Difference]: With dead ends: 13107 [2021-06-05 23:15:09,257 INFO L226 Difference]: Without dead ends: 13046 [2021-06-05 23:15:09,258 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1127 ImplicationChecksByTransitivity, 2028.2ms TimeCoverageRelationStatistics Valid=901, Invalid=3929, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 23:15:09,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13046 states. [2021-06-05 23:15:09,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13046 to 7052. [2021-06-05 23:15:09,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7052 states, 7051 states have (on average 3.3450574386611827) internal successors, (23586), 7051 states have internal predecessors, (23586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:15:09,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7052 states to 7052 states and 23586 transitions. [2021-06-05 23:15:09,403 INFO L78 Accepts]: Start accepts. Automaton has 7052 states and 23586 transitions. Word has length 34 [2021-06-05 23:15:09,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:15:09,403 INFO L482 AbstractCegarLoop]: Abstraction has 7052 states and 23586 transitions. [2021-06-05 23:15:09,403 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:15:09,403 INFO L276 IsEmpty]: Start isEmpty. Operand 7052 states and 23586 transitions. [2021-06-05 23:15:09,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 23:15:09,412 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:15:09,412 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:15:09,629 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:15:09,629 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:15:09,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:15:09,629 INFO L82 PathProgramCache]: Analyzing trace with hash 311935523, now seen corresponding path program 17 times [2021-06-05 23:15:09,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:15:09,629 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916441663] [2021-06-05 23:15:09,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:15:09,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:15:09,850 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:15:09,850 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:15:09,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916441663] [2021-06-05 23:15:09,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916441663] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:15:09,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559642277] [2021-06-05 23:15:09,850 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:15:09,875 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 23:15:09,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:15:09,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 23:15:09,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:15:10,453 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:15:10,454 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1559642277] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:15:10,454 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:15:10,454 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 33 [2021-06-05 23:15:10,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030770882] [2021-06-05 23:15:10,454 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 23:15:10,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:15:10,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 23:15:10,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=905, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 23:15:10,455 INFO L87 Difference]: Start difference. First operand 7052 states and 23586 transitions. Second operand has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:15:13,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:15:13,811 INFO L93 Difference]: Finished difference Result 15153 states and 48281 transitions. [2021-06-05 23:15:13,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-06-05 23:15:13,812 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-06-05 23:15:13,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:15:13,834 INFO L225 Difference]: With dead ends: 15153 [2021-06-05 23:15:13,834 INFO L226 Difference]: Without dead ends: 15073 [2021-06-05 23:15:13,835 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2261 ImplicationChecksByTransitivity, 2729.9ms TimeCoverageRelationStatistics Valid=1274, Invalid=6558, Unknown=0, NotChecked=0, Total=7832 [2021-06-05 23:15:13,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15073 states. [2021-06-05 23:15:13,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15073 to 7120. [2021-06-05 23:15:13,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7120 states, 7119 states have (on average 3.345975558364939) internal successors, (23820), 7119 states have internal predecessors, (23820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:15:13,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7120 states to 7120 states and 23820 transitions. [2021-06-05 23:15:13,995 INFO L78 Accepts]: Start accepts. Automaton has 7120 states and 23820 transitions. Word has length 34 [2021-06-05 23:15:13,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:15:13,996 INFO L482 AbstractCegarLoop]: Abstraction has 7120 states and 23820 transitions. [2021-06-05 23:15:13,996 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:15:13,996 INFO L276 IsEmpty]: Start isEmpty. Operand 7120 states and 23820 transitions. [2021-06-05 23:15:14,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 23:15:14,006 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:15:14,006 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:15:14,220 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:15:14,221 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:15:14,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:15:14,221 INFO L82 PathProgramCache]: Analyzing trace with hash 1634184655, now seen corresponding path program 18 times [2021-06-05 23:15:14,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:15:14,221 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199333512] [2021-06-05 23:15:14,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:15:14,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:15:14,516 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:15:14,517 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:15:14,517 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199333512] [2021-06-05 23:15:14,517 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199333512] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:15:14,517 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [398854129] [2021-06-05 23:15:14,517 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:15:14,540 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 23:15:14,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:15:14,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 23:15:14,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:15:15,106 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:15:15,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [398854129] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:15:15,106 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:15:15,107 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16] total 33 [2021-06-05 23:15:15,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400428875] [2021-06-05 23:15:15,107 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 23:15:15,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:15:15,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 23:15:15,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=969, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 23:15:15,108 INFO L87 Difference]: Start difference. First operand 7120 states and 23820 transitions. Second operand has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:15:16,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:15:16,931 INFO L93 Difference]: Finished difference Result 10976 states and 35019 transitions. [2021-06-05 23:15:16,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 23:15:16,931 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-06-05 23:15:16,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:15:16,946 INFO L225 Difference]: With dead ends: 10976 [2021-06-05 23:15:16,946 INFO L226 Difference]: Without dead ends: 10902 [2021-06-05 23:15:16,947 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 797 ImplicationChecksByTransitivity, 1453.2ms TimeCoverageRelationStatistics Valid=436, Invalid=2756, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 23:15:16,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10902 states. [2021-06-05 23:15:17,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10902 to 7382. [2021-06-05 23:15:17,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7382 states, 7381 states have (on average 3.341959084134941) internal successors, (24667), 7381 states have internal predecessors, (24667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:15:17,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7382 states to 7382 states and 24667 transitions. [2021-06-05 23:15:17,079 INFO L78 Accepts]: Start accepts. Automaton has 7382 states and 24667 transitions. Word has length 34 [2021-06-05 23:15:17,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:15:17,079 INFO L482 AbstractCegarLoop]: Abstraction has 7382 states and 24667 transitions. [2021-06-05 23:15:17,080 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:15:17,080 INFO L276 IsEmpty]: Start isEmpty. Operand 7382 states and 24667 transitions. [2021-06-05 23:15:17,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 23:15:17,089 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:15:17,089 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:15:17,290 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:15:17,290 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:15:17,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:15:17,291 INFO L82 PathProgramCache]: Analyzing trace with hash -981282097, now seen corresponding path program 19 times [2021-06-05 23:15:17,291 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:15:17,291 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457216302] [2021-06-05 23:15:17,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:15:17,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:15:17,541 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:15:17,541 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:15:17,541 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457216302] [2021-06-05 23:15:17,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457216302] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:15:17,542 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2147274302] [2021-06-05 23:15:17,542 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:15:17,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:15:17,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 23:15:17,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:15:18,246 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:15:18,246 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2147274302] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:15:18,246 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:15:18,246 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 36 [2021-06-05 23:15:18,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323744985] [2021-06-05 23:15:18,247 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 23:15:18,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:15:18,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 23:15:18,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=1123, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 23:15:18,247 INFO L87 Difference]: Start difference. First operand 7382 states and 24667 transitions. Second operand has 37 states, 37 states have (on average 1.7837837837837838) internal successors, (66), 36 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:15:21,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:15:21,732 INFO L93 Difference]: Finished difference Result 14490 states and 46802 transitions. [2021-06-05 23:15:21,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-06-05 23:15:21,733 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.7837837837837838) internal successors, (66), 36 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-06-05 23:15:21,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:15:21,754 INFO L225 Difference]: With dead ends: 14490 [2021-06-05 23:15:21,755 INFO L226 Difference]: Without dead ends: 14422 [2021-06-05 23:15:21,757 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2698 ImplicationChecksByTransitivity, 2866.9ms TimeCoverageRelationStatistics Valid=1500, Invalid=7430, Unknown=0, NotChecked=0, Total=8930 [2021-06-05 23:15:21,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14422 states. [2021-06-05 23:15:21,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14422 to 7458. [2021-06-05 23:15:21,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7458 states, 7457 states have (on average 3.347995172321309) internal successors, (24966), 7457 states have internal predecessors, (24966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:15:21,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7458 states to 7458 states and 24966 transitions. [2021-06-05 23:15:21,903 INFO L78 Accepts]: Start accepts. Automaton has 7458 states and 24966 transitions. Word has length 34 [2021-06-05 23:15:21,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:15:21,903 INFO L482 AbstractCegarLoop]: Abstraction has 7458 states and 24966 transitions. [2021-06-05 23:15:21,903 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.7837837837837838) internal successors, (66), 36 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:15:21,903 INFO L276 IsEmpty]: Start isEmpty. Operand 7458 states and 24966 transitions. [2021-06-05 23:15:21,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 23:15:21,912 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:15:21,912 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:15:22,114 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable93 [2021-06-05 23:15:22,114 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:15:22,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:15:22,114 INFO L82 PathProgramCache]: Analyzing trace with hash -263714097, now seen corresponding path program 20 times [2021-06-05 23:15:22,115 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:15:22,115 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034473763] [2021-06-05 23:15:22,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:15:22,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:15:22,426 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:15:22,427 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:15:22,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034473763] [2021-06-05 23:15:22,427 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034473763] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:15:22,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749397885] [2021-06-05 23:15:22,427 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:15:22,463 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:15:22,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:15:22,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 23:15:22,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:15:23,070 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:15:23,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1749397885] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:15:23,070 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:15:23,070 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 16] total 34 [2021-06-05 23:15:23,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470098619] [2021-06-05 23:15:23,070 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 23:15:23,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:15:23,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 23:15:23,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=965, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 23:15:23,071 INFO L87 Difference]: Start difference. First operand 7458 states and 24966 transitions. Second operand has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:15:26,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:15:26,819 INFO L93 Difference]: Finished difference Result 16738 states and 53735 transitions. [2021-06-05 23:15:26,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-06-05 23:15:26,820 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-06-05 23:15:26,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:15:26,846 INFO L225 Difference]: With dead ends: 16738 [2021-06-05 23:15:26,846 INFO L226 Difference]: Without dead ends: 16649 [2021-06-05 23:15:26,847 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 16 SyntacticMatches, 4 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2794 ImplicationChecksByTransitivity, 3093.5ms TimeCoverageRelationStatistics Valid=1578, Invalid=7352, Unknown=0, NotChecked=0, Total=8930 [2021-06-05 23:15:26,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16649 states. [2021-06-05 23:15:26,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16649 to 7399. [2021-06-05 23:15:26,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7399 states, 7398 states have (on average 3.34279535009462) internal successors, (24730), 7398 states have internal predecessors, (24730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:15:27,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7399 states to 7399 states and 24730 transitions. [2021-06-05 23:15:27,009 INFO L78 Accepts]: Start accepts. Automaton has 7399 states and 24730 transitions. Word has length 34 [2021-06-05 23:15:27,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:15:27,009 INFO L482 AbstractCegarLoop]: Abstraction has 7399 states and 24730 transitions. [2021-06-05 23:15:27,009 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:15:27,009 INFO L276 IsEmpty]: Start isEmpty. Operand 7399 states and 24730 transitions. [2021-06-05 23:15:27,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 23:15:27,018 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:15:27,018 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:15:27,220 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:15:27,221 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:15:27,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:15:27,221 INFO L82 PathProgramCache]: Analyzing trace with hash 1457868367, now seen corresponding path program 21 times [2021-06-05 23:15:27,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:15:27,221 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130175255] [2021-06-05 23:15:27,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:15:27,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:15:27,465 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:15:27,465 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:15:27,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130175255] [2021-06-05 23:15:27,465 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130175255] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:15:27,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [561349746] [2021-06-05 23:15:27,465 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:15:27,489 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 23:15:27,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:15:27,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 23:15:27,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:15:28,007 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:15:28,007 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [561349746] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:15:28,007 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:15:28,007 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 32 [2021-06-05 23:15:28,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427258836] [2021-06-05 23:15:28,007 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 23:15:28,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:15:28,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 23:15:28,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=878, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 23:15:28,008 INFO L87 Difference]: Start difference. First operand 7399 states and 24730 transitions. Second operand has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:15:31,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:15:31,585 INFO L93 Difference]: Finished difference Result 11618 states and 37622 transitions. [2021-06-05 23:15:31,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-06-05 23:15:31,585 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-06-05 23:15:31,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:15:31,602 INFO L225 Difference]: With dead ends: 11618 [2021-06-05 23:15:31,602 INFO L226 Difference]: Without dead ends: 11538 [2021-06-05 23:15:31,603 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2216 ImplicationChecksByTransitivity, 2898.6ms TimeCoverageRelationStatistics Valid=1448, Invalid=6562, Unknown=0, NotChecked=0, Total=8010 [2021-06-05 23:15:31,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11538 states. [2021-06-05 23:15:31,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11538 to 7515. [2021-06-05 23:15:31,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7515 states, 7514 states have (on average 3.344423742347618) internal successors, (25130), 7514 states have internal predecessors, (25130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:15:31,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7515 states to 7515 states and 25130 transitions. [2021-06-05 23:15:31,741 INFO L78 Accepts]: Start accepts. Automaton has 7515 states and 25130 transitions. Word has length 34 [2021-06-05 23:15:31,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:15:31,741 INFO L482 AbstractCegarLoop]: Abstraction has 7515 states and 25130 transitions. [2021-06-05 23:15:31,741 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:15:31,741 INFO L276 IsEmpty]: Start isEmpty. Operand 7515 states and 25130 transitions. [2021-06-05 23:15:31,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 23:15:31,749 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:15:31,749 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:15:31,949 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2021-06-05 23:15:31,949 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:15:31,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:15:31,950 INFO L82 PathProgramCache]: Analyzing trace with hash -695932121, now seen corresponding path program 22 times [2021-06-05 23:15:31,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:15:31,950 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050052988] [2021-06-05 23:15:31,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:15:31,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:15:32,159 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:15:32,159 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:15:32,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050052988] [2021-06-05 23:15:32,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050052988] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:15:32,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [748582830] [2021-06-05 23:15:32,159 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:15:32,183 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:15:32,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:15:32,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 23:15:32,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:15:32,744 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:15:32,745 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [748582830] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:15:32,745 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:15:32,745 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-06-05 23:15:32,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402662743] [2021-06-05 23:15:32,745 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 23:15:32,745 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:15:32,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 23:15:32,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=901, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 23:15:32,745 INFO L87 Difference]: Start difference. First operand 7515 states and 25130 transitions. Second operand has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:15:33,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:15:33,803 INFO L93 Difference]: Finished difference Result 9401 states and 30720 transitions. [2021-06-05 23:15:33,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 23:15:33,804 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-06-05 23:15:33,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:15:33,816 INFO L225 Difference]: With dead ends: 9401 [2021-06-05 23:15:33,817 INFO L226 Difference]: Without dead ends: 9333 [2021-06-05 23:15:33,817 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 484 ImplicationChecksByTransitivity, 1044.6ms TimeCoverageRelationStatistics Valid=387, Invalid=1869, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 23:15:33,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9333 states. [2021-06-05 23:15:33,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9333 to 7545. [2021-06-05 23:15:33,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7545 states, 7544 states have (on average 3.345440084835631) internal successors, (25238), 7544 states have internal predecessors, (25238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:15:33,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7545 states to 7545 states and 25238 transitions. [2021-06-05 23:15:33,975 INFO L78 Accepts]: Start accepts. Automaton has 7545 states and 25238 transitions. Word has length 34 [2021-06-05 23:15:33,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:15:33,975 INFO L482 AbstractCegarLoop]: Abstraction has 7545 states and 25238 transitions. [2021-06-05 23:15:33,975 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:15:33,975 INFO L276 IsEmpty]: Start isEmpty. Operand 7545 states and 25238 transitions. [2021-06-05 23:15:33,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 23:15:33,984 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:15:33,984 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:15:34,184 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable126 [2021-06-05 23:15:34,184 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:15:34,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:15:34,185 INFO L82 PathProgramCache]: Analyzing trace with hash 225770019, now seen corresponding path program 23 times [2021-06-05 23:15:34,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:15:34,185 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265270462] [2021-06-05 23:15:34,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:15:34,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:15:34,390 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:15:34,390 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:15:34,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265270462] [2021-06-05 23:15:34,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265270462] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:15:34,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2087061621] [2021-06-05 23:15:34,390 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:15:34,415 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 23:15:34,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:15:34,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 23:15:34,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:15:34,979 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:15:34,979 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2087061621] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:15:34,980 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:15:34,980 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-06-05 23:15:34,980 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173574360] [2021-06-05 23:15:34,980 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 23:15:34,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:15:34,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 23:15:34,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=887, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 23:15:34,981 INFO L87 Difference]: Start difference. First operand 7545 states and 25238 transitions. Second operand has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:15:36,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:15:36,196 INFO L93 Difference]: Finished difference Result 10842 states and 35698 transitions. [2021-06-05 23:15:36,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 23:15:36,197 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-06-05 23:15:36,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:15:36,212 INFO L225 Difference]: With dead ends: 10842 [2021-06-05 23:15:36,212 INFO L226 Difference]: Without dead ends: 10762 [2021-06-05 23:15:36,212 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 559 ImplicationChecksByTransitivity, 1136.8ms TimeCoverageRelationStatistics Valid=439, Invalid=2111, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 23:15:36,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10762 states. [2021-06-05 23:15:36,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10762 to 7545. [2021-06-05 23:15:36,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7545 states, 7544 states have (on average 3.345440084835631) internal successors, (25238), 7544 states have internal predecessors, (25238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:15:36,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7545 states to 7545 states and 25238 transitions. [2021-06-05 23:15:36,353 INFO L78 Accepts]: Start accepts. Automaton has 7545 states and 25238 transitions. Word has length 34 [2021-06-05 23:15:36,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:15:36,353 INFO L482 AbstractCegarLoop]: Abstraction has 7545 states and 25238 transitions. [2021-06-05 23:15:36,353 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:15:36,353 INFO L276 IsEmpty]: Start isEmpty. Operand 7545 states and 25238 transitions. [2021-06-05 23:15:36,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 23:15:36,361 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:15:36,361 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:15:36,561 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:15:36,561 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:15:36,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:15:36,562 INFO L82 PathProgramCache]: Analyzing trace with hash 155659983, now seen corresponding path program 24 times [2021-06-05 23:15:36,562 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:15:36,562 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308299995] [2021-06-05 23:15:36,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:15:36,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:15:36,755 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:15:36,755 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:15:36,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308299995] [2021-06-05 23:15:36,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308299995] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:15:36,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [174345066] [2021-06-05 23:15:36,755 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:15:36,779 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 23:15:36,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:15:36,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 23:15:36,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:15:37,269 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:15:37,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [174345066] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:15:37,270 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:15:37,270 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 31 [2021-06-05 23:15:37,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311678079] [2021-06-05 23:15:37,270 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 23:15:37,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:15:37,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 23:15:37,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=822, Unknown=0, NotChecked=0, Total=992 [2021-06-05 23:15:37,271 INFO L87 Difference]: Start difference. First operand 7545 states and 25238 transitions. Second operand has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:15:38,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:15:38,355 INFO L93 Difference]: Finished difference Result 10057 states and 33260 transitions. [2021-06-05 23:15:38,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 23:15:38,355 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-06-05 23:15:38,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:15:38,369 INFO L225 Difference]: With dead ends: 10057 [2021-06-05 23:15:38,369 INFO L226 Difference]: Without dead ends: 9977 [2021-06-05 23:15:38,369 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 479 ImplicationChecksByTransitivity, 1012.0ms TimeCoverageRelationStatistics Valid=426, Invalid=1830, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 23:15:38,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9977 states. [2021-06-05 23:15:38,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9977 to 7549. [2021-06-05 23:15:38,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7549 states, 7548 states have (on average 3.34525702172761) internal successors, (25250), 7548 states have internal predecessors, (25250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:15:38,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7549 states to 7549 states and 25250 transitions. [2021-06-05 23:15:38,513 INFO L78 Accepts]: Start accepts. Automaton has 7549 states and 25250 transitions. Word has length 34 [2021-06-05 23:15:38,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:15:38,513 INFO L482 AbstractCegarLoop]: Abstraction has 7549 states and 25250 transitions. [2021-06-05 23:15:38,513 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:15:38,513 INFO L276 IsEmpty]: Start isEmpty. Operand 7549 states and 25250 transitions. [2021-06-05 23:15:38,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 23:15:38,520 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:15:38,520 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:15:38,721 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable148 [2021-06-05 23:15:38,721 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:15:38,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:15:38,721 INFO L82 PathProgramCache]: Analyzing trace with hash 918964363, now seen corresponding path program 25 times [2021-06-05 23:15:38,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:15:38,721 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573214621] [2021-06-05 23:15:38,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:15:38,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:15:38,956 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:15:38,956 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:15:38,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573214621] [2021-06-05 23:15:38,956 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573214621] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:15:38,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1215300381] [2021-06-05 23:15:38,956 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 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:15:39,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:15:39,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 23:15:39,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:15:39,553 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:15:39,554 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1215300381] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:15:39,554 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:15:39,554 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-06-05 23:15:39,554 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696728923] [2021-06-05 23:15:39,554 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 23:15:39,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:15:39,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 23:15:39,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=990, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 23:15:39,554 INFO L87 Difference]: Start difference. First operand 7549 states and 25250 transitions. Second operand has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:15:41,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:15:41,040 INFO L93 Difference]: Finished difference Result 10304 states and 33237 transitions. [2021-06-05 23:15:41,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-05 23:15:41,041 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-06-05 23:15:41,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:15:41,054 INFO L225 Difference]: With dead ends: 10304 [2021-06-05 23:15:41,054 INFO L226 Difference]: Without dead ends: 10170 [2021-06-05 23:15:41,054 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 801 ImplicationChecksByTransitivity, 1419.0ms TimeCoverageRelationStatistics Valid=588, Invalid=2834, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 23:15:41,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10170 states. [2021-06-05 23:15:41,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10170 to 7672. [2021-06-05 23:15:41,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7672 states, 7671 states have (on average 3.3451961934558727) internal successors, (25661), 7671 states have internal predecessors, (25661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:15:41,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7672 states to 7672 states and 25661 transitions. [2021-06-05 23:15:41,167 INFO L78 Accepts]: Start accepts. Automaton has 7672 states and 25661 transitions. Word has length 34 [2021-06-05 23:15:41,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:15:41,167 INFO L482 AbstractCegarLoop]: Abstraction has 7672 states and 25661 transitions. [2021-06-05 23:15:41,167 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:15:41,167 INFO L276 IsEmpty]: Start isEmpty. Operand 7672 states and 25661 transitions. [2021-06-05 23:15:41,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 23:15:41,175 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:15:41,175 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:15:41,388 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:15:41,388 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:15:41,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:15:41,389 INFO L82 PathProgramCache]: Analyzing trace with hash 1636532363, now seen corresponding path program 26 times [2021-06-05 23:15:41,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:15:41,389 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898211208] [2021-06-05 23:15:41,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:15:41,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:15:41,612 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:15:41,612 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:15:41,613 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898211208] [2021-06-05 23:15:41,613 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898211208] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:15:41,613 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231657844] [2021-06-05 23:15:41,613 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 [2021-06-05 23:15:41,651 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:15:41,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:15:41,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 23:15:41,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:15:42,144 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:15:42,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [231657844] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:15:42,145 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:15:42,145 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 32 [2021-06-05 23:15:42,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409487904] [2021-06-05 23:15:42,145 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 23:15:42,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:15:42,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 23:15:42,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=847, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 23:15:42,146 INFO L87 Difference]: Start difference. First operand 7672 states and 25661 transitions. Second operand has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:15:43,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:15:43,928 INFO L93 Difference]: Finished difference Result 13599 states and 43266 transitions. [2021-06-05 23:15:43,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-05 23:15:43,928 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-06-05 23:15:43,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:15:43,947 INFO L225 Difference]: With dead ends: 13599 [2021-06-05 23:15:43,947 INFO L226 Difference]: Without dead ends: 13421 [2021-06-05 23:15:43,947 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1112 ImplicationChecksByTransitivity, 1685.4ms TimeCoverageRelationStatistics Valid=814, Invalid=3346, Unknown=0, NotChecked=0, Total=4160 [2021-06-05 23:15:43,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13421 states. [2021-06-05 23:15:44,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13421 to 7674. [2021-06-05 23:15:44,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7674 states, 7673 states have (on average 3.345236543724749) internal successors, (25668), 7673 states have internal predecessors, (25668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:15:44,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7674 states to 7674 states and 25668 transitions. [2021-06-05 23:15:44,094 INFO L78 Accepts]: Start accepts. Automaton has 7674 states and 25668 transitions. Word has length 34 [2021-06-05 23:15:44,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:15:44,094 INFO L482 AbstractCegarLoop]: Abstraction has 7674 states and 25668 transitions. [2021-06-05 23:15:44,094 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:15:44,094 INFO L276 IsEmpty]: Start isEmpty. Operand 7674 states and 25668 transitions. [2021-06-05 23:15:44,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 23:15:44,102 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:15:44,102 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:15:44,302 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable170 [2021-06-05 23:15:44,303 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:15:44,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:15:44,303 INFO L82 PathProgramCache]: Analyzing trace with hash -182677553, now seen corresponding path program 27 times [2021-06-05 23:15:44,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:15:44,303 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38839319] [2021-06-05 23:15:44,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:15:44,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:15:44,509 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:15:44,509 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:15:44,509 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38839319] [2021-06-05 23:15:44,509 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38839319] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:15:44,509 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1096317048] [2021-06-05 23:15:44,509 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 [2021-06-05 23:15:44,532 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 23:15:44,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:15:44,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 23:15:44,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:15:45,021 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:15:45,021 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1096317048] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:15:45,021 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:15:45,021 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 31 [2021-06-05 23:15:45,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155854085] [2021-06-05 23:15:45,021 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 23:15:45,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:15:45,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 23:15:45,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=826, Unknown=0, NotChecked=0, Total=992 [2021-06-05 23:15:45,022 INFO L87 Difference]: Start difference. First operand 7674 states and 25668 transitions. Second operand has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:15:46,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:15:46,066 INFO L93 Difference]: Finished difference Result 10242 states and 33864 transitions. [2021-06-05 23:15:46,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 23:15:46,067 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-06-05 23:15:46,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:15:46,081 INFO L225 Difference]: With dead ends: 10242 [2021-06-05 23:15:46,081 INFO L226 Difference]: Without dead ends: 10162 [2021-06-05 23:15:46,081 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 1001.2ms TimeCoverageRelationStatistics Valid=414, Invalid=1842, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 23:15:46,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10162 states. [2021-06-05 23:15:46,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10162 to 7686. [2021-06-05 23:15:46,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7686 states, 7685 states have (on average 3.34469746258946) internal successors, (25704), 7685 states have internal predecessors, (25704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:15:46,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7686 states to 7686 states and 25704 transitions. [2021-06-05 23:15:46,200 INFO L78 Accepts]: Start accepts. Automaton has 7686 states and 25704 transitions. Word has length 34 [2021-06-05 23:15:46,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:15:46,201 INFO L482 AbstractCegarLoop]: Abstraction has 7686 states and 25704 transitions. [2021-06-05 23:15:46,201 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:15:46,201 INFO L276 IsEmpty]: Start isEmpty. Operand 7686 states and 25704 transitions. [2021-06-05 23:15:46,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 23:15:46,209 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:15:46,209 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:15:46,424 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:15:46,425 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:15:46,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:15:46,425 INFO L82 PathProgramCache]: Analyzing trace with hash -1490931889, now seen corresponding path program 28 times [2021-06-05 23:15:46,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:15:46,425 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889130092] [2021-06-05 23:15:46,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:15:46,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:15:46,634 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:15:46,635 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:15:46,635 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889130092] [2021-06-05 23:15:46,635 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889130092] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:15:46,635 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135970014] [2021-06-05 23:15:46,635 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:15:46,660 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:15:46,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:15:46,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 23:15:46,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:15:47,246 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:15:47,246 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2135970014] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:15:47,246 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:15:47,246 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-06-05 23:15:47,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551980348] [2021-06-05 23:15:47,247 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 23:15:47,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:15:47,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 23:15:47,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=1010, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 23:15:47,247 INFO L87 Difference]: Start difference. First operand 7686 states and 25704 transitions. Second operand has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:15:48,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:15:48,400 INFO L93 Difference]: Finished difference Result 11237 states and 36295 transitions. [2021-06-05 23:15:48,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 23:15:48,400 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-06-05 23:15:48,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:15:48,417 INFO L225 Difference]: With dead ends: 11237 [2021-06-05 23:15:48,418 INFO L226 Difference]: Without dead ends: 11176 [2021-06-05 23:15:48,418 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 648 ImplicationChecksByTransitivity, 1256.3ms TimeCoverageRelationStatistics Valid=474, Invalid=2496, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 23:15:48,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11176 states. [2021-06-05 23:15:48,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11176 to 7730. [2021-06-05 23:15:48,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7730 states, 7729 states have (on average 3.3486867641350755) internal successors, (25882), 7729 states have internal predecessors, (25882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:15:48,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7730 states to 7730 states and 25882 transitions. [2021-06-05 23:15:48,552 INFO L78 Accepts]: Start accepts. Automaton has 7730 states and 25882 transitions. Word has length 34 [2021-06-05 23:15:48,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:15:48,553 INFO L482 AbstractCegarLoop]: Abstraction has 7730 states and 25882 transitions. [2021-06-05 23:15:48,553 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:15:48,553 INFO L276 IsEmpty]: Start isEmpty. Operand 7730 states and 25882 transitions. [2021-06-05 23:15:48,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 23:15:48,561 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:15:48,561 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:15:48,779 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable192 [2021-06-05 23:15:48,779 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:15:48,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:15:48,779 INFO L82 PathProgramCache]: Analyzing trace with hash 776789583, now seen corresponding path program 29 times [2021-06-05 23:15:48,780 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:15:48,780 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363970899] [2021-06-05 23:15:48,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:15:48,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:15:48,996 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:15:48,996 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:15:48,996 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363970899] [2021-06-05 23:15:48,996 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363970899] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:15:48,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1635923234] [2021-06-05 23:15:48,997 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 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:15:49,024 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 23:15:49,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:15:49,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 23:15:49,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:15:49,549 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:15:49,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1635923234] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:15:49,550 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:15:49,550 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 33 [2021-06-05 23:15:49,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560305740] [2021-06-05 23:15:49,550 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 23:15:49,550 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:15:49,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 23:15:49,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=921, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 23:15:49,551 INFO L87 Difference]: Start difference. First operand 7730 states and 25882 transitions. Second operand has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:15:51,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:15:51,969 INFO L93 Difference]: Finished difference Result 15447 states and 50397 transitions. [2021-06-05 23:15:51,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-05 23:15:51,969 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-06-05 23:15:51,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:15:51,991 INFO L225 Difference]: With dead ends: 15447 [2021-06-05 23:15:51,991 INFO L226 Difference]: Without dead ends: 15367 [2021-06-05 23:15:51,992 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1735 ImplicationChecksByTransitivity, 2148.7ms TimeCoverageRelationStatistics Valid=1019, Invalid=5143, Unknown=0, NotChecked=0, Total=6162 [2021-06-05 23:15:52,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15367 states. [2021-06-05 23:15:52,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15367 to 7685. [2021-06-05 23:15:52,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7685 states, 7684 states have (on average 3.345002602811036) internal successors, (25703), 7684 states have internal predecessors, (25703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:15:52,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7685 states to 7685 states and 25703 transitions. [2021-06-05 23:15:52,161 INFO L78 Accepts]: Start accepts. Automaton has 7685 states and 25703 transitions. Word has length 34 [2021-06-05 23:15:52,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:15:52,161 INFO L482 AbstractCegarLoop]: Abstraction has 7685 states and 25703 transitions. [2021-06-05 23:15:52,161 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:15:52,161 INFO L276 IsEmpty]: Start isEmpty. Operand 7685 states and 25703 transitions. [2021-06-05 23:15:52,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 23:15:52,169 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:15:52,169 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:15:52,369 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable203,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:15:52,369 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:15:52,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:15:52,370 INFO L82 PathProgramCache]: Analyzing trace with hash 1501827023, now seen corresponding path program 30 times [2021-06-05 23:15:52,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:15:52,370 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604619562] [2021-06-05 23:15:52,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:15:52,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:15:52,581 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:15:52,581 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:15:52,581 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604619562] [2021-06-05 23:15:52,581 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604619562] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:15:52,581 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140313884] [2021-06-05 23:15:52,581 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 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:15:52,605 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 23:15:52,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:15:52,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 23:15:52,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:15:53,112 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:15:53,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [140313884] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:15:53,112 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:15:53,112 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 31 [2021-06-05 23:15:53,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324089967] [2021-06-05 23:15:53,112 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 23:15:53,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:15:53,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 23:15:53,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=806, Unknown=0, NotChecked=0, Total=992 [2021-06-05 23:15:53,113 INFO L87 Difference]: Start difference. First operand 7685 states and 25703 transitions. Second operand has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:15:54,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:15:54,049 INFO L93 Difference]: Finished difference Result 10155 states and 33589 transitions. [2021-06-05 23:15:54,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 23:15:54,049 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-06-05 23:15:54,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:15:54,066 INFO L225 Difference]: With dead ends: 10155 [2021-06-05 23:15:54,066 INFO L226 Difference]: Without dead ends: 10075 [2021-06-05 23:15:54,067 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 469 ImplicationChecksByTransitivity, 997.9ms TimeCoverageRelationStatistics Valid=417, Invalid=1745, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 23:15:54,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10075 states. [2021-06-05 23:15:54,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10075 to 7685. [2021-06-05 23:15:54,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7685 states, 7684 states have (on average 3.345002602811036) internal successors, (25703), 7684 states have internal predecessors, (25703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:15:54,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7685 states to 7685 states and 25703 transitions. [2021-06-05 23:15:54,221 INFO L78 Accepts]: Start accepts. Automaton has 7685 states and 25703 transitions. Word has length 34 [2021-06-05 23:15:54,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:15:54,221 INFO L482 AbstractCegarLoop]: Abstraction has 7685 states and 25703 transitions. [2021-06-05 23:15:54,221 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:15:54,221 INFO L276 IsEmpty]: Start isEmpty. Operand 7685 states and 25703 transitions. [2021-06-05 23:15:54,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 23:15:54,229 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:15:54,229 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:15:54,432 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable214 [2021-06-05 23:15:54,433 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:15:54,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:15:54,433 INFO L82 PathProgramCache]: Analyzing trace with hash -1856335409, now seen corresponding path program 31 times [2021-06-05 23:15:54,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:15:54,433 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044856464] [2021-06-05 23:15:54,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:15:54,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:15:54,654 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:15:54,654 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:15:54,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044856464] [2021-06-05 23:15:54,654 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044856464] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:15:54,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694749702] [2021-06-05 23:15:54,654 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 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:15:54,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:15:54,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 23:15:54,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:15:55,227 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:15:55,227 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [694749702] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:15:55,227 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:15:55,227 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-06-05 23:15:55,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289655535] [2021-06-05 23:15:55,227 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 23:15:55,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:15:55,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 23:15:55,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=864, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 23:15:55,228 INFO L87 Difference]: Start difference. First operand 7685 states and 25703 transitions. Second operand has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:15:56,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:15:56,159 INFO L93 Difference]: Finished difference Result 9851 states and 32529 transitions. [2021-06-05 23:15:56,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 23:15:56,159 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-06-05 23:15:56,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:15:56,172 INFO L225 Difference]: With dead ends: 9851 [2021-06-05 23:15:56,173 INFO L226 Difference]: Without dead ends: 9771 [2021-06-05 23:15:56,173 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 483 ImplicationChecksByTransitivity, 1045.5ms TimeCoverageRelationStatistics Valid=420, Invalid=1836, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 23:15:56,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9771 states. [2021-06-05 23:15:56,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9771 to 7685. [2021-06-05 23:15:56,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7685 states, 7684 states have (on average 3.345002602811036) internal successors, (25703), 7684 states have internal predecessors, (25703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:15:56,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7685 states to 7685 states and 25703 transitions. [2021-06-05 23:15:56,285 INFO L78 Accepts]: Start accepts. Automaton has 7685 states and 25703 transitions. Word has length 34 [2021-06-05 23:15:56,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:15:56,286 INFO L482 AbstractCegarLoop]: Abstraction has 7685 states and 25703 transitions. [2021-06-05 23:15:56,286 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:15:56,286 INFO L276 IsEmpty]: Start isEmpty. Operand 7685 states and 25703 transitions. [2021-06-05 23:15:56,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 23:15:56,294 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:15:56,294 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:15:56,495 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable225,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:15:56,495 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:15:56,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:15:56,495 INFO L82 PathProgramCache]: Analyzing trace with hash -2021710497, now seen corresponding path program 32 times [2021-06-05 23:15:56,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:15:56,495 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220086688] [2021-06-05 23:15:56,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:15:56,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:15:56,716 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:15:56,716 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:15:56,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220086688] [2021-06-05 23:15:56,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220086688] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:15:56,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [451545080] [2021-06-05 23:15:56,716 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 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:15:56,738 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:15:56,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:15:56,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 23:15:56,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:15:57,264 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:15:57,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [451545080] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:15:57,264 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:15:57,264 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 32 [2021-06-05 23:15:57,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048218305] [2021-06-05 23:15:57,264 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 23:15:57,265 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:15:57,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 23:15:57,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=895, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 23:15:57,265 INFO L87 Difference]: Start difference. First operand 7685 states and 25703 transitions. Second operand has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:15:59,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:15:59,648 INFO L93 Difference]: Finished difference Result 12991 states and 42326 transitions. [2021-06-05 23:15:59,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-06-05 23:15:59,649 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-06-05 23:15:59,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:15:59,668 INFO L225 Difference]: With dead ends: 12991 [2021-06-05 23:15:59,668 INFO L226 Difference]: Without dead ends: 12911 [2021-06-05 23:15:59,669 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1422 ImplicationChecksByTransitivity, 2012.6ms TimeCoverageRelationStatistics Valid=863, Invalid=4539, Unknown=0, NotChecked=0, Total=5402 [2021-06-05 23:15:59,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12911 states. [2021-06-05 23:15:59,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12911 to 7733. [2021-06-05 23:15:59,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7733 states, 7732 states have (on average 3.3441541645111226) internal successors, (25857), 7732 states have internal predecessors, (25857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:15:59,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7733 states to 7733 states and 25857 transitions. [2021-06-05 23:15:59,820 INFO L78 Accepts]: Start accepts. Automaton has 7733 states and 25857 transitions. Word has length 34 [2021-06-05 23:15:59,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:15:59,820 INFO L482 AbstractCegarLoop]: Abstraction has 7733 states and 25857 transitions. [2021-06-05 23:15:59,820 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:15:59,820 INFO L276 IsEmpty]: Start isEmpty. Operand 7733 states and 25857 transitions. [2021-06-05 23:15:59,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 23:15:59,828 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:15:59,828 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:16:00,028 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable236 [2021-06-05 23:16:00,028 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:16:00,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:16:00,029 INFO L82 PathProgramCache]: Analyzing trace with hash 119456311, now seen corresponding path program 33 times [2021-06-05 23:16:00,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:16:00,029 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400947442] [2021-06-05 23:16:00,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:16:00,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:16:00,234 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:16:00,234 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:16:00,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400947442] [2021-06-05 23:16:00,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400947442] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:16:00,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [163980554] [2021-06-05 23:16:00,234 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:16:00,258 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 23:16:00,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:16:00,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 23:16:00,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:16:00,773 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:16:00,773 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [163980554] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:16:00,773 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:16:00,773 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 31 [2021-06-05 23:16:00,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139988011] [2021-06-05 23:16:00,773 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 23:16:00,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:16:00,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 23:16:00,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=858, Unknown=0, NotChecked=0, Total=992 [2021-06-05 23:16:00,774 INFO L87 Difference]: Start difference. First operand 7733 states and 25857 transitions. Second operand has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:16:02,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:16:02,224 INFO L93 Difference]: Finished difference Result 10389 states and 33911 transitions. [2021-06-05 23:16:02,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 23:16:02,224 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-06-05 23:16:02,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:16:02,239 INFO L225 Difference]: With dead ends: 10389 [2021-06-05 23:16:02,239 INFO L226 Difference]: Without dead ends: 10315 [2021-06-05 23:16:02,239 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 663 ImplicationChecksByTransitivity, 1193.2ms TimeCoverageRelationStatistics Valid=437, Invalid=2425, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 23:16:02,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10315 states. [2021-06-05 23:16:02,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10315 to 7770. [2021-06-05 23:16:02,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7770 states, 7769 states have (on average 3.3457330415754925) internal successors, (25993), 7769 states have internal predecessors, (25993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:16:02,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7770 states to 7770 states and 25993 transitions. [2021-06-05 23:16:02,389 INFO L78 Accepts]: Start accepts. Automaton has 7770 states and 25993 transitions. Word has length 34 [2021-06-05 23:16:02,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:16:02,389 INFO L482 AbstractCegarLoop]: Abstraction has 7770 states and 25993 transitions. [2021-06-05 23:16:02,389 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:16:02,389 INFO L276 IsEmpty]: Start isEmpty. Operand 7770 states and 25993 transitions. [2021-06-05 23:16:02,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 23:16:02,397 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:16:02,397 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:16:02,597 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable247 [2021-06-05 23:16:02,597 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:16:02,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:16:02,598 INFO L82 PathProgramCache]: Analyzing trace with hash 971048415, now seen corresponding path program 34 times [2021-06-05 23:16:02,598 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:16:02,598 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042274043] [2021-06-05 23:16:02,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:16:02,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:16:02,788 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:16:02,788 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:16:02,788 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042274043] [2021-06-05 23:16:02,788 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042274043] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:16:02,788 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2126580805] [2021-06-05 23:16:02,788 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 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:16:02,810 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:16:02,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:16:02,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 23:16:02,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:16:03,303 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:16:03,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2126580805] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:16:03,303 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:16:03,303 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-06-05 23:16:03,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304506500] [2021-06-05 23:16:03,303 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 23:16:03,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:16:03,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 23:16:03,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=899, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 23:16:03,304 INFO L87 Difference]: Start difference. First operand 7770 states and 25993 transitions. Second operand has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:16:04,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:16:04,623 INFO L93 Difference]: Finished difference Result 11540 states and 38141 transitions. [2021-06-05 23:16:04,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 23:16:04,623 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-06-05 23:16:04,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:16:04,639 INFO L225 Difference]: With dead ends: 11540 [2021-06-05 23:16:04,639 INFO L226 Difference]: Without dead ends: 11460 [2021-06-05 23:16:04,640 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 617 ImplicationChecksByTransitivity, 1091.7ms TimeCoverageRelationStatistics Valid=447, Invalid=2205, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 23:16:04,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11460 states. [2021-06-05 23:16:04,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11460 to 7774. [2021-06-05 23:16:04,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7774 states, 7773 states have (on average 3.3455551267206998) internal successors, (26005), 7773 states have internal predecessors, (26005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:16:04,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7774 states to 7774 states and 26005 transitions. [2021-06-05 23:16:04,765 INFO L78 Accepts]: Start accepts. Automaton has 7774 states and 26005 transitions. Word has length 34 [2021-06-05 23:16:04,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:16:04,766 INFO L482 AbstractCegarLoop]: Abstraction has 7774 states and 26005 transitions. [2021-06-05 23:16:04,766 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:16:04,766 INFO L276 IsEmpty]: Start isEmpty. Operand 7774 states and 26005 transitions. [2021-06-05 23:16:04,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 23:16:04,812 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:16:04,812 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:16:05,012 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable258,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:16:05,012 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:16:05,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:16:05,013 INFO L82 PathProgramCache]: Analyzing trace with hash 1734352795, now seen corresponding path program 35 times [2021-06-05 23:16:05,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:16:05,013 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061353259] [2021-06-05 23:16:05,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:16:05,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:16:05,227 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:16:05,228 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:16:05,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061353259] [2021-06-05 23:16:05,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061353259] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:16:05,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1503725335] [2021-06-05 23:16:05,228 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 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:16:05,251 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 23:16:05,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:16:05,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 23:16:05,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:16:05,796 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:16:05,796 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1503725335] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:16:05,796 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:16:05,796 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-06-05 23:16:05,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430282683] [2021-06-05 23:16:05,797 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 23:16:05,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:16:05,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 23:16:05,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=1004, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 23:16:05,797 INFO L87 Difference]: Start difference. First operand 7774 states and 26005 transitions. Second operand has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:16:07,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:16:07,389 INFO L93 Difference]: Finished difference Result 11043 states and 35560 transitions. [2021-06-05 23:16:07,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-05 23:16:07,389 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-06-05 23:16:07,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:16:07,404 INFO L225 Difference]: With dead ends: 11043 [2021-06-05 23:16:07,404 INFO L226 Difference]: Without dead ends: 10909 [2021-06-05 23:16:07,405 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 919 ImplicationChecksByTransitivity, 1438.5ms TimeCoverageRelationStatistics Valid=597, Invalid=3063, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 23:16:07,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10909 states. [2021-06-05 23:16:07,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10909 to 7897. [2021-06-05 23:16:07,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7897 states, 7896 states have (on average 3.3456180344478215) internal successors, (26417), 7896 states have internal predecessors, (26417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:16:07,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7897 states to 7897 states and 26417 transitions. [2021-06-05 23:16:07,583 INFO L78 Accepts]: Start accepts. Automaton has 7897 states and 26417 transitions. Word has length 34 [2021-06-05 23:16:07,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:16:07,583 INFO L482 AbstractCegarLoop]: Abstraction has 7897 states and 26417 transitions. [2021-06-05 23:16:07,583 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:16:07,583 INFO L276 IsEmpty]: Start isEmpty. Operand 7897 states and 26417 transitions. [2021-06-05 23:16:07,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 23:16:07,591 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:16:07,591 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:16:07,792 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable269 [2021-06-05 23:16:07,792 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:16:07,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:16:07,792 INFO L82 PathProgramCache]: Analyzing trace with hash -1843046501, now seen corresponding path program 36 times [2021-06-05 23:16:07,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:16:07,793 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045377282] [2021-06-05 23:16:07,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:16:07,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:16:08,020 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:16:08,020 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:16:08,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045377282] [2021-06-05 23:16:08,020 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045377282] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:16:08,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942201910] [2021-06-05 23:16:08,020 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 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:16:08,045 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 23:16:08,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:16:08,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 23:16:08,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:16:08,560 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:16:08,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1942201910] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:16:08,560 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:16:08,560 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 32 [2021-06-05 23:16:08,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857271008] [2021-06-05 23:16:08,560 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 23:16:08,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:16:08,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 23:16:08,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=861, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 23:16:08,561 INFO L87 Difference]: Start difference. First operand 7897 states and 26417 transitions. Second operand has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:16:10,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:16:10,519 INFO L93 Difference]: Finished difference Result 14412 states and 45857 transitions. [2021-06-05 23:16:10,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-05 23:16:10,520 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-06-05 23:16:10,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:16:10,542 INFO L225 Difference]: With dead ends: 14412 [2021-06-05 23:16:10,542 INFO L226 Difference]: Without dead ends: 14234 [2021-06-05 23:16:10,542 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1241 ImplicationChecksByTransitivity, 1726.7ms TimeCoverageRelationStatistics Valid=810, Invalid=3480, Unknown=0, NotChecked=0, Total=4290 [2021-06-05 23:16:10,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14234 states. [2021-06-05 23:16:10,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14234 to 7884. [2021-06-05 23:16:10,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7884 states, 7883 states have (on average 3.344792591652924) internal successors, (26367), 7883 states have internal predecessors, (26367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:16:10,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7884 states to 7884 states and 26367 transitions. [2021-06-05 23:16:10,701 INFO L78 Accepts]: Start accepts. Automaton has 7884 states and 26367 transitions. Word has length 34 [2021-06-05 23:16:10,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:16:10,701 INFO L482 AbstractCegarLoop]: Abstraction has 7884 states and 26367 transitions. [2021-06-05 23:16:10,701 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:16:10,701 INFO L276 IsEmpty]: Start isEmpty. Operand 7884 states and 26367 transitions. [2021-06-05 23:16:10,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 23:16:10,710 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:16:10,710 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:16:10,910 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable280,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:16:10,910 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:16:10,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:16:10,911 INFO L82 PathProgramCache]: Analyzing trace with hash 632710879, now seen corresponding path program 37 times [2021-06-05 23:16:10,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:16:10,911 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138322251] [2021-06-05 23:16:10,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:16:10,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:16:11,153 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:16:11,153 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:16:11,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138322251] [2021-06-05 23:16:11,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [138322251] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:16:11,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926145095] [2021-06-05 23:16:11,153 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 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 23:16:11,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:16:11,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 23:16:11,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:16:11,718 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:16:11,719 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [926145095] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:16:11,719 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:16:11,719 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-06-05 23:16:11,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315942125] [2021-06-05 23:16:11,719 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 23:16:11,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:16:11,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 23:16:11,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=901, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 23:16:11,719 INFO L87 Difference]: Start difference. First operand 7884 states and 26367 transitions. Second operand has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:16:12,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:16:12,884 INFO L93 Difference]: Finished difference Result 11462 states and 37893 transitions. [2021-06-05 23:16:12,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 23:16:12,885 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-06-05 23:16:12,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:16:12,901 INFO L225 Difference]: With dead ends: 11462 [2021-06-05 23:16:12,901 INFO L226 Difference]: Without dead ends: 11382 [2021-06-05 23:16:12,902 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 564 ImplicationChecksByTransitivity, 1153.1ms TimeCoverageRelationStatistics Valid=421, Invalid=2129, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 23:16:12,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11382 states. [2021-06-05 23:16:13,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11382 to 7876. [2021-06-05 23:16:13,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7876 states, 7875 states have (on average 3.345142857142857) internal successors, (26343), 7875 states have internal predecessors, (26343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:16:13,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7876 states to 7876 states and 26343 transitions. [2021-06-05 23:16:13,031 INFO L78 Accepts]: Start accepts. Automaton has 7876 states and 26343 transitions. Word has length 34 [2021-06-05 23:16:13,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:16:13,031 INFO L482 AbstractCegarLoop]: Abstraction has 7876 states and 26343 transitions. [2021-06-05 23:16:13,032 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:16:13,032 INFO L276 IsEmpty]: Start isEmpty. Operand 7876 states and 26343 transitions. [2021-06-05 23:16:13,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 23:16:13,040 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:16:13,040 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:16:13,240 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable291 [2021-06-05 23:16:13,240 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:16:13,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:16:13,241 INFO L82 PathProgramCache]: Analyzing trace with hash 1437152207, now seen corresponding path program 38 times [2021-06-05 23:16:13,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:16:13,241 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515753679] [2021-06-05 23:16:13,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:16:13,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:16:13,492 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:16:13,492 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:16:13,492 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515753679] [2021-06-05 23:16:13,492 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515753679] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:16:13,492 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [210635737] [2021-06-05 23:16:13,492 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 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:16:13,516 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:16:13,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:16:13,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 23:16:13,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:16:14,057 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:16:14,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [210635737] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:16:14,060 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:16:14,060 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 32 [2021-06-05 23:16:14,060 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953182192] [2021-06-05 23:16:14,060 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 23:16:14,060 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:16:14,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 23:16:14,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=889, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 23:16:14,060 INFO L87 Difference]: Start difference. First operand 7876 states and 26343 transitions. Second operand has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:16:16,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:16:16,732 INFO L93 Difference]: Finished difference Result 11431 states and 37218 transitions. [2021-06-05 23:16:16,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-06-05 23:16:16,732 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-06-05 23:16:16,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:16:16,748 INFO L225 Difference]: With dead ends: 11431 [2021-06-05 23:16:16,748 INFO L226 Difference]: Without dead ends: 11364 [2021-06-05 23:16:16,748 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1488 ImplicationChecksByTransitivity, 2290.4ms TimeCoverageRelationStatistics Valid=876, Invalid=4674, Unknown=0, NotChecked=0, Total=5550 [2021-06-05 23:16:16,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11364 states. [2021-06-05 23:16:16,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11364 to 8088. [2021-06-05 23:16:16,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8088 states, 8087 states have (on average 3.344503524174601) internal successors, (27047), 8087 states have internal predecessors, (27047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:16:16,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8088 states to 8088 states and 27047 transitions. [2021-06-05 23:16:16,882 INFO L78 Accepts]: Start accepts. Automaton has 8088 states and 27047 transitions. Word has length 34 [2021-06-05 23:16:16,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:16:16,882 INFO L482 AbstractCegarLoop]: Abstraction has 8088 states and 27047 transitions. [2021-06-05 23:16:16,882 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:16:16,883 INFO L276 IsEmpty]: Start isEmpty. Operand 8088 states and 27047 transitions. [2021-06-05 23:16:16,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 23:16:16,890 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:16:16,891 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:16:17,091 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable302 [2021-06-05 23:16:17,091 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:16:17,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:16:17,091 INFO L82 PathProgramCache]: Analyzing trace with hash -716648281, now seen corresponding path program 39 times [2021-06-05 23:16:17,091 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:16:17,091 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597782190] [2021-06-05 23:16:17,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:16:17,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:16:17,298 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:16:17,298 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:16:17,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597782190] [2021-06-05 23:16:17,298 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597782190] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:16:17,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [447371798] [2021-06-05 23:16:17,298 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 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:16:17,328 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 23:16:17,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:16:17,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 23:16:17,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:16:17,820 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:16:17,820 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [447371798] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:16:17,820 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:16:17,820 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 31 [2021-06-05 23:16:17,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903854146] [2021-06-05 23:16:17,820 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 23:16:17,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:16:17,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 23:16:17,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=838, Unknown=0, NotChecked=0, Total=992 [2021-06-05 23:16:17,821 INFO L87 Difference]: Start difference. First operand 8088 states and 27047 transitions. Second operand has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:16:19,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:16:19,728 INFO L93 Difference]: Finished difference Result 11398 states and 37361 transitions. [2021-06-05 23:16:19,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 23:16:19,729 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-06-05 23:16:19,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:16:19,744 INFO L225 Difference]: With dead ends: 11398 [2021-06-05 23:16:19,744 INFO L226 Difference]: Without dead ends: 11324 [2021-06-05 23:16:19,745 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 987 ImplicationChecksByTransitivity, 1707.8ms TimeCoverageRelationStatistics Valid=610, Invalid=3172, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 23:16:19,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11324 states. [2021-06-05 23:16:19,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11324 to 8124. [2021-06-05 23:16:19,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8124 states, 8123 states have (on average 3.345931306167672) internal successors, (27179), 8123 states have internal predecessors, (27179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:16:19,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8124 states to 8124 states and 27179 transitions. [2021-06-05 23:16:19,873 INFO L78 Accepts]: Start accepts. Automaton has 8124 states and 27179 transitions. Word has length 34 [2021-06-05 23:16:19,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:16:19,873 INFO L482 AbstractCegarLoop]: Abstraction has 8124 states and 27179 transitions. [2021-06-05 23:16:19,873 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:16:19,873 INFO L276 IsEmpty]: Start isEmpty. Operand 8124 states and 27179 transitions. [2021-06-05 23:16:19,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 23:16:19,881 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:16:19,882 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:16:20,082 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable313,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:16:20,082 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:16:20,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:16:20,082 INFO L82 PathProgramCache]: Analyzing trace with hash 134943823, now seen corresponding path program 40 times [2021-06-05 23:16:20,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:16:20,082 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989156056] [2021-06-05 23:16:20,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:16:20,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:16:20,314 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:16:20,314 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:16:20,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989156056] [2021-06-05 23:16:20,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989156056] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:16:20,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1715367880] [2021-06-05 23:16:20,314 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 23:16:20,337 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:16:20,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:16:20,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 23:16:20,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:16:20,859 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:16:20,859 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1715367880] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:16:20,860 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:16:20,860 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-06-05 23:16:20,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291978791] [2021-06-05 23:16:20,860 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 23:16:20,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:16:20,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 23:16:20,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=877, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 23:16:20,860 INFO L87 Difference]: Start difference. First operand 8124 states and 27179 transitions. Second operand has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:16:22,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:16:22,160 INFO L93 Difference]: Finished difference Result 12758 states and 41655 transitions. [2021-06-05 23:16:22,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 23:16:22,161 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-06-05 23:16:22,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:16:22,179 INFO L225 Difference]: With dead ends: 12758 [2021-06-05 23:16:22,180 INFO L226 Difference]: Without dead ends: 12678 [2021-06-05 23:16:22,180 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 675 ImplicationChecksByTransitivity, 1279.1ms TimeCoverageRelationStatistics Valid=499, Invalid=2153, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 23:16:22,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12678 states. [2021-06-05 23:16:22,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12678 to 8126. [2021-06-05 23:16:22,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8126 states, 8125 states have (on average 3.345846153846154) internal successors, (27185), 8125 states have internal predecessors, (27185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:16:22,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8126 states to 8126 states and 27185 transitions. [2021-06-05 23:16:22,322 INFO L78 Accepts]: Start accepts. Automaton has 8126 states and 27185 transitions. Word has length 34 [2021-06-05 23:16:22,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:16:22,322 INFO L482 AbstractCegarLoop]: Abstraction has 8126 states and 27185 transitions. [2021-06-05 23:16:22,322 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:16:22,322 INFO L276 IsEmpty]: Start isEmpty. Operand 8126 states and 27185 transitions. [2021-06-05 23:16:22,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 23:16:22,331 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:16:22,331 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:16:22,531 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable324 [2021-06-05 23:16:22,531 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:16:22,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:16:22,531 INFO L82 PathProgramCache]: Analyzing trace with hash 898248203, now seen corresponding path program 41 times [2021-06-05 23:16:22,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:16:22,532 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113377672] [2021-06-05 23:16:22,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:16:22,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:16:22,795 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:16:22,795 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:16:22,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113377672] [2021-06-05 23:16:22,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113377672] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:16:22,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [943758395] [2021-06-05 23:16:22,795 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 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:16:22,818 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 23:16:22,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:16:22,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 23:16:22,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:16:23,370 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:16:23,370 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [943758395] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:16:23,370 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:16:23,370 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-06-05 23:16:23,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403241427] [2021-06-05 23:16:23,370 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 23:16:23,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:16:23,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 23:16:23,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=1003, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 23:16:23,371 INFO L87 Difference]: Start difference. First operand 8126 states and 27185 transitions. Second operand has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:16:25,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:16:25,773 INFO L93 Difference]: Finished difference Result 13402 states and 43284 transitions. [2021-06-05 23:16:25,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-05 23:16:25,774 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-06-05 23:16:25,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:16:25,793 INFO L225 Difference]: With dead ends: 13402 [2021-06-05 23:16:25,793 INFO L226 Difference]: Without dead ends: 13334 [2021-06-05 23:16:25,793 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1471 ImplicationChecksByTransitivity, 2069.7ms TimeCoverageRelationStatistics Valid=958, Invalid=4444, Unknown=0, NotChecked=0, Total=5402 [2021-06-05 23:16:25,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13334 states. [2021-06-05 23:16:25,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13334 to 8624. [2021-06-05 23:16:25,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8624 states, 8623 states have (on average 3.339325060883683) internal successors, (28795), 8623 states have internal predecessors, (28795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:16:25,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8624 states to 8624 states and 28795 transitions. [2021-06-05 23:16:25,942 INFO L78 Accepts]: Start accepts. Automaton has 8624 states and 28795 transitions. Word has length 34 [2021-06-05 23:16:25,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:16:25,942 INFO L482 AbstractCegarLoop]: Abstraction has 8624 states and 28795 transitions. [2021-06-05 23:16:25,942 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:16:25,942 INFO L276 IsEmpty]: Start isEmpty. Operand 8624 states and 28795 transitions. [2021-06-05 23:16:25,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 23:16:25,950 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:16:25,950 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:16:26,151 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable335,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:16:26,151 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:16:26,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:16:26,151 INFO L82 PathProgramCache]: Analyzing trace with hash 1615816203, now seen corresponding path program 42 times [2021-06-05 23:16:26,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:16:26,151 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653531307] [2021-06-05 23:16:26,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:16:26,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:16:26,422 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:16:26,422 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:16:26,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653531307] [2021-06-05 23:16:26,422 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653531307] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:16:26,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636868863] [2021-06-05 23:16:26,422 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:16:26,446 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 23:16:26,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:16:26,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 23:16:26,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:16:26,926 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:16:26,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1636868863] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:16:26,926 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:16:26,926 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 32 [2021-06-05 23:16:26,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892662548] [2021-06-05 23:16:26,926 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 23:16:26,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:16:26,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 23:16:26,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=857, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 23:16:26,927 INFO L87 Difference]: Start difference. First operand 8624 states and 28795 transitions. Second operand has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:16:28,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:16:28,551 INFO L93 Difference]: Finished difference Result 16986 states and 55205 transitions. [2021-06-05 23:16:28,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-05 23:16:28,551 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-06-05 23:16:28,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:16:28,576 INFO L225 Difference]: With dead ends: 16986 [2021-06-05 23:16:28,576 INFO L226 Difference]: Without dead ends: 16888 [2021-06-05 23:16:28,576 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 814 ImplicationChecksByTransitivity, 1450.9ms TimeCoverageRelationStatistics Valid=612, Invalid=2580, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 23:16:28,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16888 states. [2021-06-05 23:16:28,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16888 to 8622. [2021-06-05 23:16:28,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8622 states, 8621 states have (on average 3.3391717898155666) internal successors, (28787), 8621 states have internal predecessors, (28787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:16:28,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8622 states to 8622 states and 28787 transitions. [2021-06-05 23:16:28,750 INFO L78 Accepts]: Start accepts. Automaton has 8622 states and 28787 transitions. Word has length 34 [2021-06-05 23:16:28,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:16:28,751 INFO L482 AbstractCegarLoop]: Abstraction has 8622 states and 28787 transitions. [2021-06-05 23:16:28,751 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:16:28,751 INFO L276 IsEmpty]: Start isEmpty. Operand 8622 states and 28787 transitions. [2021-06-05 23:16:28,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 23:16:28,759 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:16:28,759 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:16:28,959 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable346 [2021-06-05 23:16:28,960 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:16:28,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:16:28,960 INFO L82 PathProgramCache]: Analyzing trace with hash -203393713, now seen corresponding path program 43 times [2021-06-05 23:16:28,960 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:16:28,960 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432065049] [2021-06-05 23:16:28,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:16:28,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:16:29,186 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:16:29,186 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:16:29,186 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432065049] [2021-06-05 23:16:29,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432065049] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:16:29,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527648327] [2021-06-05 23:16:29,187 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 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:16:29,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:16:29,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 23:16:29,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:16:29,701 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:16:29,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1527648327] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:16:29,702 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:16:29,702 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-06-05 23:16:29,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419291797] [2021-06-05 23:16:29,702 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 23:16:29,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:16:29,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 23:16:29,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=877, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 23:16:29,702 INFO L87 Difference]: Start difference. First operand 8622 states and 28787 transitions. Second operand has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:16:31,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:16:31,171 INFO L93 Difference]: Finished difference Result 14190 states and 46183 transitions. [2021-06-05 23:16:31,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 23:16:31,172 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-06-05 23:16:31,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:16:31,192 INFO L225 Difference]: With dead ends: 14190 [2021-06-05 23:16:31,192 INFO L226 Difference]: Without dead ends: 14110 [2021-06-05 23:16:31,193 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 692 ImplicationChecksByTransitivity, 1298.2ms TimeCoverageRelationStatistics Valid=507, Invalid=2249, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 23:16:31,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14110 states. [2021-06-05 23:16:31,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14110 to 8630. [2021-06-05 23:16:31,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8630 states, 8629 states have (on average 3.3388573415227722) internal successors, (28811), 8629 states have internal predecessors, (28811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:16:31,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8630 states to 8630 states and 28811 transitions. [2021-06-05 23:16:31,346 INFO L78 Accepts]: Start accepts. Automaton has 8630 states and 28811 transitions. Word has length 34 [2021-06-05 23:16:31,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:16:31,346 INFO L482 AbstractCegarLoop]: Abstraction has 8630 states and 28811 transitions. [2021-06-05 23:16:31,346 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:16:31,346 INFO L276 IsEmpty]: Start isEmpty. Operand 8630 states and 28811 transitions. [2021-06-05 23:16:31,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 23:16:31,354 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:16:31,355 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:16:31,555 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable357,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:16:31,555 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:16:31,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:16:31,555 INFO L82 PathProgramCache]: Analyzing trace with hash -115829921, now seen corresponding path program 44 times [2021-06-05 23:16:31,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:16:31,555 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853220749] [2021-06-05 23:16:31,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:16:31,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:16:31,760 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:16:31,760 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:16:31,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853220749] [2021-06-05 23:16:31,761 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853220749] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:16:31,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [971921342] [2021-06-05 23:16:31,761 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:16:31,783 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:16:31,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:16:31,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 23:16:31,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:16:32,243 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:16:32,244 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [971921342] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:16:32,244 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:16:32,244 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 31 [2021-06-05 23:16:32,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102419550] [2021-06-05 23:16:32,244 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 23:16:32,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:16:32,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 23:16:32,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=830, Unknown=0, NotChecked=0, Total=992 [2021-06-05 23:16:32,245 INFO L87 Difference]: Start difference. First operand 8630 states and 28811 transitions. Second operand has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:16:35,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:16:35,053 INFO L93 Difference]: Finished difference Result 15771 states and 50789 transitions. [2021-06-05 23:16:35,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-06-05 23:16:35,054 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-06-05 23:16:35,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:16:35,076 INFO L225 Difference]: With dead ends: 15771 [2021-06-05 23:16:35,076 INFO L226 Difference]: Without dead ends: 15691 [2021-06-05 23:16:35,077 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1543 ImplicationChecksByTransitivity, 2294.8ms TimeCoverageRelationStatistics Valid=899, Invalid=4801, Unknown=0, NotChecked=0, Total=5700 [2021-06-05 23:16:35,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15691 states. [2021-06-05 23:16:35,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15691 to 9020. [2021-06-05 23:16:35,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9020 states, 9019 states have (on average 3.351036700299368) internal successors, (30223), 9019 states have internal predecessors, (30223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:16:35,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9020 states to 9020 states and 30223 transitions. [2021-06-05 23:16:35,248 INFO L78 Accepts]: Start accepts. Automaton has 9020 states and 30223 transitions. Word has length 34 [2021-06-05 23:16:35,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:16:35,248 INFO L482 AbstractCegarLoop]: Abstraction has 9020 states and 30223 transitions. [2021-06-05 23:16:35,248 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:16:35,248 INFO L276 IsEmpty]: Start isEmpty. Operand 9020 states and 30223 transitions. [2021-06-05 23:16:35,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 23:16:35,257 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:16:35,257 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:16:35,458 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable368,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:16:35,458 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:16:35,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:16:35,458 INFO L82 PathProgramCache]: Analyzing trace with hash 1758131039, now seen corresponding path program 45 times [2021-06-05 23:16:35,458 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:16:35,458 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150803735] [2021-06-05 23:16:35,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:16:35,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:16:35,694 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:16:35,694 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:16:35,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150803735] [2021-06-05 23:16:35,694 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150803735] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:16:35,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2066386439] [2021-06-05 23:16:35,695 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:16:35,720 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 23:16:35,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:16:35,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 23:16:35,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:16:36,196 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:16:36,196 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2066386439] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:16:36,196 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:16:36,196 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 31 [2021-06-05 23:16:36,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056442408] [2021-06-05 23:16:36,196 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 23:16:36,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:16:36,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 23:16:36,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=817, Unknown=0, NotChecked=0, Total=992 [2021-06-05 23:16:36,197 INFO L87 Difference]: Start difference. First operand 9020 states and 30223 transitions. Second operand has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:16:38,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:16:38,055 INFO L93 Difference]: Finished difference Result 15861 states and 52080 transitions. [2021-06-05 23:16:38,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 23:16:38,055 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-06-05 23:16:38,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:16:38,078 INFO L225 Difference]: With dead ends: 15861 [2021-06-05 23:16:38,079 INFO L226 Difference]: Without dead ends: 15781 [2021-06-05 23:16:38,079 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 921 ImplicationChecksByTransitivity, 1576.1ms TimeCoverageRelationStatistics Valid=665, Invalid=2757, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 23:16:38,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15781 states. [2021-06-05 23:16:38,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15781 to 9108. [2021-06-05 23:16:38,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9108 states, 9107 states have (on average 3.3542330075765894) internal successors, (30547), 9107 states have internal predecessors, (30547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:16:38,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9108 states to 9108 states and 30547 transitions. [2021-06-05 23:16:38,259 INFO L78 Accepts]: Start accepts. Automaton has 9108 states and 30547 transitions. Word has length 34 [2021-06-05 23:16:38,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:16:38,259 INFO L482 AbstractCegarLoop]: Abstraction has 9108 states and 30547 transitions. [2021-06-05 23:16:38,259 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:16:38,259 INFO L276 IsEmpty]: Start isEmpty. Operand 9108 states and 30547 transitions. [2021-06-05 23:16:38,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 23:16:38,268 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:16:38,268 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:16:38,469 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable379 [2021-06-05 23:16:38,469 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:16:38,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:16:38,469 INFO L82 PathProgramCache]: Analyzing trace with hash 934876179, now seen corresponding path program 46 times [2021-06-05 23:16:38,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:16:38,469 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964070103] [2021-06-05 23:16:38,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:16:38,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:16:38,684 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:16:38,684 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:16:38,684 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964070103] [2021-06-05 23:16:38,684 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964070103] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:16:38,684 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992512967] [2021-06-05 23:16:38,684 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 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:16:38,707 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:16:38,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:16:38,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 23:16:38,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:16:39,252 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:16:39,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [992512967] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:16:39,253 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:16:39,253 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-06-05 23:16:39,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868810159] [2021-06-05 23:16:39,253 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 23:16:39,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:16:39,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 23:16:39,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=1018, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 23:16:39,254 INFO L87 Difference]: Start difference. First operand 9108 states and 30547 transitions. Second operand has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:16:40,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:16:40,509 INFO L93 Difference]: Finished difference Result 14291 states and 46571 transitions. [2021-06-05 23:16:40,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 23:16:40,509 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-06-05 23:16:40,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:16:40,528 INFO L225 Difference]: With dead ends: 14291 [2021-06-05 23:16:40,528 INFO L226 Difference]: Without dead ends: 14230 [2021-06-05 23:16:40,528 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 595 ImplicationChecksByTransitivity, 1219.3ms TimeCoverageRelationStatistics Valid=464, Invalid=2398, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 23:16:40,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14230 states. [2021-06-05 23:16:40,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14230 to 9186. [2021-06-05 23:16:40,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9186 states, 9185 states have (on average 3.3555797495917257) internal successors, (30821), 9185 states have internal predecessors, (30821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:16:40,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9186 states to 9186 states and 30821 transitions. [2021-06-05 23:16:40,684 INFO L78 Accepts]: Start accepts. Automaton has 9186 states and 30821 transitions. Word has length 34 [2021-06-05 23:16:40,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:16:40,684 INFO L482 AbstractCegarLoop]: Abstraction has 9186 states and 30821 transitions. [2021-06-05 23:16:40,684 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:16:40,684 INFO L276 IsEmpty]: Start isEmpty. Operand 9186 states and 30821 transitions. [2021-06-05 23:16:40,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 23:16:40,693 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:16:40,693 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:16:40,893 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable390,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:16:40,894 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:16:40,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:16:40,894 INFO L82 PathProgramCache]: Analyzing trace with hash -1092369645, now seen corresponding path program 47 times [2021-06-05 23:16:40,894 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:16:40,894 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982550950] [2021-06-05 23:16:40,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:16:40,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:16:41,103 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:16:41,104 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:16:41,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982550950] [2021-06-05 23:16:41,104 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982550950] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:16:41,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [698781098] [2021-06-05 23:16:41,104 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 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:16:41,127 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 23:16:41,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:16:41,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 23:16:41,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:16:41,637 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:16:41,637 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [698781098] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:16:41,637 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:16:41,637 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 33 [2021-06-05 23:16:41,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957265095] [2021-06-05 23:16:41,637 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 23:16:41,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:16:41,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 23:16:41,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=930, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 23:16:41,638 INFO L87 Difference]: Start difference. First operand 9186 states and 30821 transitions. Second operand has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:16:44,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:16:44,073 INFO L93 Difference]: Finished difference Result 19194 states and 63283 transitions. [2021-06-05 23:16:44,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-06-05 23:16:44,074 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-06-05 23:16:44,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:16:44,103 INFO L225 Difference]: With dead ends: 19194 [2021-06-05 23:16:44,103 INFO L226 Difference]: Without dead ends: 19114 [2021-06-05 23:16:44,103 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1478 ImplicationChecksByTransitivity, 1943.5ms TimeCoverageRelationStatistics Valid=915, Invalid=4635, Unknown=0, NotChecked=0, Total=5550 [2021-06-05 23:16:44,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19114 states. [2021-06-05 23:16:44,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19114 to 9171. [2021-06-05 23:16:44,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9171 states, 9170 states have (on average 3.353435114503817) internal successors, (30751), 9170 states have internal predecessors, (30751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:16:44,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9171 states to 9171 states and 30751 transitions. [2021-06-05 23:16:44,296 INFO L78 Accepts]: Start accepts. Automaton has 9171 states and 30751 transitions. Word has length 34 [2021-06-05 23:16:44,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:16:44,296 INFO L482 AbstractCegarLoop]: Abstraction has 9171 states and 30751 transitions. [2021-06-05 23:16:44,296 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:16:44,296 INFO L276 IsEmpty]: Start isEmpty. Operand 9171 states and 30751 transitions. [2021-06-05 23:16:44,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 23:16:44,306 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:16:44,306 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:16:44,506 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable401 [2021-06-05 23:16:44,506 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:16:44,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:16:44,506 INFO L82 PathProgramCache]: Analyzing trace with hash -367332205, now seen corresponding path program 48 times [2021-06-05 23:16:44,506 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:16:44,507 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217383506] [2021-06-05 23:16:44,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:16:44,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:16:44,701 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:16:44,701 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:16:44,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217383506] [2021-06-05 23:16:44,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [217383506] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:16:44,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942433076] [2021-06-05 23:16:44,702 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 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:16:44,725 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 23:16:44,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:16:44,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 23:16:44,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:16:45,191 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:16:45,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1942433076] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:16:45,191 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:16:45,191 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 31 [2021-06-05 23:16:45,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513841608] [2021-06-05 23:16:45,191 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 23:16:45,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:16:45,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 23:16:45,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=818, Unknown=0, NotChecked=0, Total=992 [2021-06-05 23:16:45,192 INFO L87 Difference]: Start difference. First operand 9171 states and 30751 transitions. Second operand has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:16:46,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:16:46,376 INFO L93 Difference]: Finished difference Result 12967 states and 43188 transitions. [2021-06-05 23:16:46,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 23:16:46,377 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-06-05 23:16:46,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:16:46,396 INFO L225 Difference]: With dead ends: 12967 [2021-06-05 23:16:46,396 INFO L226 Difference]: Without dead ends: 12887 [2021-06-05 23:16:46,396 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 494 ImplicationChecksByTransitivity, 1083.0ms TimeCoverageRelationStatistics Valid=468, Invalid=1982, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 23:16:46,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12887 states. [2021-06-05 23:16:46,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12887 to 9179. [2021-06-05 23:16:46,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9179 states, 9178 states have (on average 3.3531270429287425) internal successors, (30775), 9178 states have internal predecessors, (30775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:16:46,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9179 states to 9179 states and 30775 transitions. [2021-06-05 23:16:46,571 INFO L78 Accepts]: Start accepts. Automaton has 9179 states and 30775 transitions. Word has length 34 [2021-06-05 23:16:46,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:16:46,571 INFO L482 AbstractCegarLoop]: Abstraction has 9179 states and 30775 transitions. [2021-06-05 23:16:46,571 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:16:46,572 INFO L276 IsEmpty]: Start isEmpty. Operand 9179 states and 30775 transitions. [2021-06-05 23:16:46,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 23:16:46,581 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:16:46,581 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:16:46,781 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable412,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:16:46,782 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:16:46,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:16:46,782 INFO L82 PathProgramCache]: Analyzing trace with hash -705669741, now seen corresponding path program 49 times [2021-06-05 23:16:46,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:16:46,782 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155438031] [2021-06-05 23:16:46,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:16:46,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:16:46,971 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:16:46,971 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:16:46,971 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155438031] [2021-06-05 23:16:46,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1155438031] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:16:46,971 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [534222747] [2021-06-05 23:16:46,971 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 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:16:46,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:16:46,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 23:16:46,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:16:47,474 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:16:47,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [534222747] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:16:47,474 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:16:47,475 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-06-05 23:16:47,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513128751] [2021-06-05 23:16:47,475 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 23:16:47,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:16:47,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 23:16:47,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=879, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 23:16:47,475 INFO L87 Difference]: Start difference. First operand 9179 states and 30775 transitions. Second operand has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:16:48,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:16:48,730 INFO L93 Difference]: Finished difference Result 12929 states and 43085 transitions. [2021-06-05 23:16:48,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 23:16:48,730 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-06-05 23:16:48,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:16:48,749 INFO L225 Difference]: With dead ends: 12929 [2021-06-05 23:16:48,749 INFO L226 Difference]: Without dead ends: 12849 [2021-06-05 23:16:48,750 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 526 ImplicationChecksByTransitivity, 1108.7ms TimeCoverageRelationStatistics Valid=473, Invalid=2077, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 23:16:48,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12849 states. [2021-06-05 23:16:48,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12849 to 9181. [2021-06-05 23:16:48,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9181 states, 9180 states have (on average 3.353050108932462) internal successors, (30781), 9180 states have internal predecessors, (30781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:16:48,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9181 states to 9181 states and 30781 transitions. [2021-06-05 23:16:48,894 INFO L78 Accepts]: Start accepts. Automaton has 9181 states and 30781 transitions. Word has length 34 [2021-06-05 23:16:48,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:16:48,894 INFO L482 AbstractCegarLoop]: Abstraction has 9181 states and 30781 transitions. [2021-06-05 23:16:48,894 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:16:48,894 INFO L276 IsEmpty]: Start isEmpty. Operand 9181 states and 30781 transitions. [2021-06-05 23:16:48,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 23:16:48,903 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:16:48,903 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:16:49,103 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable423 [2021-06-05 23:16:49,104 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:16:49,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:16:49,104 INFO L82 PathProgramCache]: Analyzing trace with hash 569472659, now seen corresponding path program 50 times [2021-06-05 23:16:49,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:16:49,104 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309000873] [2021-06-05 23:16:49,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:16:49,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:16:49,294 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:16:49,294 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:16:49,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309000873] [2021-06-05 23:16:49,294 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309000873] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:16:49,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509073675] [2021-06-05 23:16:49,294 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 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:16:49,316 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:16:49,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:16:49,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 23:16:49,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:16:49,830 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:16:49,830 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [509073675] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:16:49,830 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:16:49,830 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 31 [2021-06-05 23:16:49,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461406634] [2021-06-05 23:16:49,831 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 23:16:49,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:16:49,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 23:16:49,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=809, Unknown=0, NotChecked=0, Total=992 [2021-06-05 23:16:49,831 INFO L87 Difference]: Start difference. First operand 9181 states and 30781 transitions. Second operand has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:16:51,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:16:51,059 INFO L93 Difference]: Finished difference Result 12817 states and 42681 transitions. [2021-06-05 23:16:51,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 23:16:51,059 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-06-05 23:16:51,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:16:51,077 INFO L225 Difference]: With dead ends: 12817 [2021-06-05 23:16:51,078 INFO L226 Difference]: Without dead ends: 12737 [2021-06-05 23:16:51,078 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 503 ImplicationChecksByTransitivity, 1110.7ms TimeCoverageRelationStatistics Valid=494, Invalid=2056, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 23:16:51,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12737 states. [2021-06-05 23:16:51,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12737 to 9109. [2021-06-05 23:16:51,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9109 states, 9108 states have (on average 3.352986385595081) internal successors, (30539), 9108 states have internal predecessors, (30539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:16:51,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9109 states to 9109 states and 30539 transitions. [2021-06-05 23:16:51,219 INFO L78 Accepts]: Start accepts. Automaton has 9109 states and 30539 transitions. Word has length 34 [2021-06-05 23:16:51,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:16:51,219 INFO L482 AbstractCegarLoop]: Abstraction has 9109 states and 30539 transitions. [2021-06-05 23:16:51,219 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:16:51,220 INFO L276 IsEmpty]: Start isEmpty. Operand 9109 states and 30539 transitions. [2021-06-05 23:16:51,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 23:16:51,229 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:16:51,229 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:16:51,429 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable434 [2021-06-05 23:16:51,429 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:16:51,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:16:51,429 INFO L82 PathProgramCache]: Analyzing trace with hash 1744662307, now seen corresponding path program 51 times [2021-06-05 23:16:51,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:16:51,430 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937503462] [2021-06-05 23:16:51,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:16:51,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:16:51,636 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:16:51,636 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:16:51,636 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937503462] [2021-06-05 23:16:51,636 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1937503462] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:16:51,637 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [451584970] [2021-06-05 23:16:51,637 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 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:16:51,659 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 23:16:51,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:16:51,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 23:16:51,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:16:52,163 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:16:52,163 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [451584970] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:16:52,163 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:16:52,163 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 32 [2021-06-05 23:16:52,163 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903286088] [2021-06-05 23:16:52,163 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 23:16:52,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:16:52,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 23:16:52,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=911, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 23:16:52,164 INFO L87 Difference]: Start difference. First operand 9109 states and 30539 transitions. Second operand has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:16:54,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:16:54,038 INFO L93 Difference]: Finished difference Result 16652 states and 54193 transitions. [2021-06-05 23:16:54,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 23:16:54,038 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-06-05 23:16:54,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:16:54,062 INFO L225 Difference]: With dead ends: 16652 [2021-06-05 23:16:54,062 INFO L226 Difference]: Without dead ends: 16578 [2021-06-05 23:16:54,063 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 761 ImplicationChecksByTransitivity, 1441.7ms TimeCoverageRelationStatistics Valid=527, Invalid=3013, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 23:16:54,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16578 states. [2021-06-05 23:16:54,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16578 to 9297. [2021-06-05 23:16:54,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9297 states, 9296 states have (on average 3.3570352839931155) internal successors, (31207), 9296 states have internal predecessors, (31207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:16:54,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9297 states to 9297 states and 31207 transitions. [2021-06-05 23:16:54,250 INFO L78 Accepts]: Start accepts. Automaton has 9297 states and 31207 transitions. Word has length 34 [2021-06-05 23:16:54,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:16:54,250 INFO L482 AbstractCegarLoop]: Abstraction has 9297 states and 31207 transitions. [2021-06-05 23:16:54,250 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:16:54,250 INFO L276 IsEmpty]: Start isEmpty. Operand 9297 states and 31207 transitions. [2021-06-05 23:16:54,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 23:16:54,260 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:16:54,260 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:16:54,461 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable445,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:16:54,461 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:16:54,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:16:54,461 INFO L82 PathProgramCache]: Analyzing trace with hash 512563959, now seen corresponding path program 52 times [2021-06-05 23:16:54,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:16:54,461 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846284067] [2021-06-05 23:16:54,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:16:54,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:16:54,671 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:16:54,671 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:16:54,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846284067] [2021-06-05 23:16:54,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846284067] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:16:54,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022629978] [2021-06-05 23:16:54,671 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:16:54,695 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:16:54,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:16:54,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 23:16:54,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:16:55,192 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:16:55,193 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2022629978] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:16:55,193 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:16:55,193 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-06-05 23:16:55,193 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703866797] [2021-06-05 23:16:55,193 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 23:16:55,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:16:55,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 23:16:55,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=895, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 23:16:55,193 INFO L87 Difference]: Start difference. First operand 9297 states and 31207 transitions. Second operand has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:16:57,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:16:57,057 INFO L93 Difference]: Finished difference Result 16129 states and 53347 transitions. [2021-06-05 23:16:57,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 23:16:57,058 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-06-05 23:16:57,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:16:57,082 INFO L225 Difference]: With dead ends: 16129 [2021-06-05 23:16:57,083 INFO L226 Difference]: Without dead ends: 16049 [2021-06-05 23:16:57,083 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 722 ImplicationChecksByTransitivity, 1353.7ms TimeCoverageRelationStatistics Valid=561, Invalid=2745, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 23:16:57,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16049 states. [2021-06-05 23:16:57,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16049 to 9301. [2021-06-05 23:16:57,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9301 states, 9300 states have (on average 3.3568817204301076) internal successors, (31219), 9300 states have internal predecessors, (31219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:16:57,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9301 states to 9301 states and 31219 transitions. [2021-06-05 23:16:57,266 INFO L78 Accepts]: Start accepts. Automaton has 9301 states and 31219 transitions. Word has length 34 [2021-06-05 23:16:57,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:16:57,266 INFO L482 AbstractCegarLoop]: Abstraction has 9301 states and 31219 transitions. [2021-06-05 23:16:57,267 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:16:57,267 INFO L276 IsEmpty]: Start isEmpty. Operand 9301 states and 31219 transitions. [2021-06-05 23:16:57,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 23:16:57,277 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:16:57,277 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:16:57,488 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable456 [2021-06-05 23:16:57,489 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:16:57,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:16:57,489 INFO L82 PathProgramCache]: Analyzing trace with hash 442453923, now seen corresponding path program 53 times [2021-06-05 23:16:57,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:16:57,489 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964996240] [2021-06-05 23:16:57,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:16:57,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:16:57,679 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:16:57,679 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:16:57,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964996240] [2021-06-05 23:16:57,680 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964996240] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:16:57,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007211151] [2021-06-05 23:16:57,680 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 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:16:57,702 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 23:16:57,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:16:57,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 23:16:57,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:16:58,201 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:16:58,201 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1007211151] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:16:58,201 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:16:58,201 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-06-05 23:16:58,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929981280] [2021-06-05 23:16:58,201 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 23:16:58,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:16:58,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 23:16:58,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=897, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 23:16:58,202 INFO L87 Difference]: Start difference. First operand 9301 states and 31219 transitions. Second operand has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:16:59,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:16:59,563 INFO L93 Difference]: Finished difference Result 15319 states and 50920 transitions. [2021-06-05 23:16:59,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 23:16:59,564 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-06-05 23:16:59,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:16:59,586 INFO L225 Difference]: With dead ends: 15319 [2021-06-05 23:16:59,587 INFO L226 Difference]: Without dead ends: 15239 [2021-06-05 23:16:59,587 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 633 ImplicationChecksByTransitivity, 1212.1ms TimeCoverageRelationStatistics Valid=524, Invalid=2446, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 23:16:59,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15239 states. [2021-06-05 23:16:59,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15239 to 9301. [2021-06-05 23:16:59,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9301 states, 9300 states have (on average 3.3568817204301076) internal successors, (31219), 9300 states have internal predecessors, (31219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:16:59,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9301 states to 9301 states and 31219 transitions. [2021-06-05 23:16:59,749 INFO L78 Accepts]: Start accepts. Automaton has 9301 states and 31219 transitions. Word has length 34 [2021-06-05 23:16:59,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:16:59,749 INFO L482 AbstractCegarLoop]: Abstraction has 9301 states and 31219 transitions. [2021-06-05 23:16:59,749 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:16:59,749 INFO L276 IsEmpty]: Start isEmpty. Operand 9301 states and 31219 transitions. [2021-06-05 23:16:59,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 23:16:59,758 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:16:59,758 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:16:59,959 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable467,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:16:59,959 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:16:59,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:16:59,959 INFO L82 PathProgramCache]: Analyzing trace with hash 1923326303, now seen corresponding path program 54 times [2021-06-05 23:16:59,959 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:16:59,959 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992718097] [2021-06-05 23:16:59,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:16:59,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:17:00,178 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:17:00,179 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:17:00,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992718097] [2021-06-05 23:17:00,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992718097] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:17:00,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1922071133] [2021-06-05 23:17:00,179 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 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:17:00,205 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 23:17:00,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:17:00,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 23:17:00,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:17:00,696 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:17:00,696 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1922071133] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:17:00,696 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:17:00,696 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 32 [2021-06-05 23:17:00,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963961003] [2021-06-05 23:17:00,697 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 23:17:00,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:17:00,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 23:17:00,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=861, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 23:17:00,697 INFO L87 Difference]: Start difference. First operand 9301 states and 31219 transitions. Second operand has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:17:02,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:17:02,422 INFO L93 Difference]: Finished difference Result 19306 states and 63066 transitions. [2021-06-05 23:17:02,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-05 23:17:02,422 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-06-05 23:17:02,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:17:02,449 INFO L225 Difference]: With dead ends: 19306 [2021-06-05 23:17:02,449 INFO L226 Difference]: Without dead ends: 19208 [2021-06-05 23:17:02,450 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 891 ImplicationChecksByTransitivity, 1504.8ms TimeCoverageRelationStatistics Valid=713, Invalid=3069, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 23:17:02,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19208 states. [2021-06-05 23:17:02,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19208 to 9199. [2021-06-05 23:17:02,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9199 states, 9198 states have (on average 3.352576647097195) internal successors, (30837), 9198 states have internal predecessors, (30837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:17:02,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9199 states to 9199 states and 30837 transitions. [2021-06-05 23:17:02,634 INFO L78 Accepts]: Start accepts. Automaton has 9199 states and 30837 transitions. Word has length 34 [2021-06-05 23:17:02,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:17:02,634 INFO L482 AbstractCegarLoop]: Abstraction has 9199 states and 30837 transitions. [2021-06-05 23:17:02,634 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:17:02,634 INFO L276 IsEmpty]: Start isEmpty. Operand 9199 states and 30837 transitions. [2021-06-05 23:17:02,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 23:17:02,644 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:17:02,644 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:17:02,844 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable478 [2021-06-05 23:17:02,844 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:17:02,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:17:02,844 INFO L82 PathProgramCache]: Analyzing trace with hash 104116387, now seen corresponding path program 55 times [2021-06-05 23:17:02,844 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:17:02,844 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690532901] [2021-06-05 23:17:02,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:17:02,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:17:03,034 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:17:03,034 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:17:03,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690532901] [2021-06-05 23:17:03,034 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690532901] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:17:03,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456942719] [2021-06-05 23:17:03,035 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 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:17:03,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:17:03,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 23:17:03,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:17:03,558 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:17:03,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [456942719] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:17:03,558 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:17:03,558 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-06-05 23:17:03,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154284155] [2021-06-05 23:17:03,558 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 23:17:03,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:17:03,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 23:17:03,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=895, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 23:17:03,559 INFO L87 Difference]: Start difference. First operand 9199 states and 30837 transitions. Second operand has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:17:05,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:17:05,067 INFO L93 Difference]: Finished difference Result 14838 states and 49288 transitions. [2021-06-05 23:17:05,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 23:17:05,067 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-06-05 23:17:05,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:17:05,090 INFO L225 Difference]: With dead ends: 14838 [2021-06-05 23:17:05,090 INFO L226 Difference]: Without dead ends: 14758 [2021-06-05 23:17:05,090 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 655 ImplicationChecksByTransitivity, 1241.2ms TimeCoverageRelationStatistics Valid=542, Invalid=2538, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 23:17:05,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14758 states. [2021-06-05 23:17:05,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14758 to 9199. [2021-06-05 23:17:05,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9199 states, 9198 states have (on average 3.352576647097195) internal successors, (30837), 9198 states have internal predecessors, (30837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:17:05,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9199 states to 9199 states and 30837 transitions. [2021-06-05 23:17:05,276 INFO L78 Accepts]: Start accepts. Automaton has 9199 states and 30837 transitions. Word has length 34 [2021-06-05 23:17:05,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:17:05,276 INFO L482 AbstractCegarLoop]: Abstraction has 9199 states and 30837 transitions. [2021-06-05 23:17:05,277 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:17:05,277 INFO L276 IsEmpty]: Start isEmpty. Operand 9199 states and 30837 transitions. [2021-06-05 23:17:05,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 23:17:05,286 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:17:05,286 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:17:05,487 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable489 [2021-06-05 23:17:05,487 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:17:05,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:17:05,487 INFO L82 PathProgramCache]: Analyzing trace with hash 539636319, now seen corresponding path program 56 times [2021-06-05 23:17:05,487 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:17:05,487 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566666961] [2021-06-05 23:17:05,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:17:05,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:17:05,679 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:17:05,680 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:17:05,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566666961] [2021-06-05 23:17:05,680 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566666961] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:17:05,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [487325347] [2021-06-05 23:17:05,680 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 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:17:05,704 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:17:05,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:17:05,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 23:17:05,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:17:06,173 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:17:06,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [487325347] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:17:06,173 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:17:06,173 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 31 [2021-06-05 23:17:06,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061765680] [2021-06-05 23:17:06,173 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 23:17:06,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:17:06,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 23:17:06,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=834, Unknown=0, NotChecked=0, Total=992 [2021-06-05 23:17:06,174 INFO L87 Difference]: Start difference. First operand 9199 states and 30837 transitions. Second operand has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:17:07,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:17:07,917 INFO L93 Difference]: Finished difference Result 19992 states and 66552 transitions. [2021-06-05 23:17:07,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 23:17:07,918 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-06-05 23:17:07,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:17:07,948 INFO L225 Difference]: With dead ends: 19992 [2021-06-05 23:17:07,948 INFO L226 Difference]: Without dead ends: 19912 [2021-06-05 23:17:07,949 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 839 ImplicationChecksByTransitivity, 1402.8ms TimeCoverageRelationStatistics Valid=625, Invalid=3035, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 23:17:07,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19912 states. [2021-06-05 23:17:08,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19912 to 9055. [2021-06-05 23:17:08,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9055 states, 9054 states have (on average 3.3537662911420365) internal successors, (30365), 9054 states have internal predecessors, (30365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:17:08,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9055 states to 9055 states and 30365 transitions. [2021-06-05 23:17:08,192 INFO L78 Accepts]: Start accepts. Automaton has 9055 states and 30365 transitions. Word has length 34 [2021-06-05 23:17:08,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:17:08,192 INFO L482 AbstractCegarLoop]: Abstraction has 9055 states and 30365 transitions. [2021-06-05 23:17:08,192 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:17:08,192 INFO L276 IsEmpty]: Start isEmpty. Operand 9055 states and 30365 transitions. [2021-06-05 23:17:08,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 23:17:08,202 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:17:08,202 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:17:08,404 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable500,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:17:08,405 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:17:08,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:17:08,406 INFO L82 PathProgramCache]: Analyzing trace with hash 720113029, now seen corresponding path program 57 times [2021-06-05 23:17:08,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:17:08,406 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343343821] [2021-06-05 23:17:08,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:17:08,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:17:08,746 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:17:08,746 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:17:08,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343343821] [2021-06-05 23:17:08,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343343821] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:17:08,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1429388049] [2021-06-05 23:17:08,746 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:17:08,770 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 23:17:08,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:17:08,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 23:17:08,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:17:09,433 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:17:09,433 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1429388049] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:17:09,433 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:17:09,433 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 34 [2021-06-05 23:17:09,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617870419] [2021-06-05 23:17:09,434 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 23:17:09,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:17:09,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 23:17:09,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=1008, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 23:17:09,434 INFO L87 Difference]: Start difference. First operand 9055 states and 30365 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:17:11,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:17:11,719 INFO L93 Difference]: Finished difference Result 12463 states and 40678 transitions. [2021-06-05 23:17:11,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-05 23:17:11,720 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 23:17:11,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:17:11,736 INFO L225 Difference]: With dead ends: 12463 [2021-06-05 23:17:11,736 INFO L226 Difference]: Without dead ends: 12343 [2021-06-05 23:17:11,736 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 939 ImplicationChecksByTransitivity, 1897.4ms TimeCoverageRelationStatistics Valid=578, Invalid=3082, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 23:17:11,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12343 states. [2021-06-05 23:17:11,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12343 to 9161. [2021-06-05 23:17:11,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9161 states, 9160 states have (on average 3.3498908296943233) internal successors, (30685), 9160 states have internal predecessors, (30685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:17:11,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9161 states to 9161 states and 30685 transitions. [2021-06-05 23:17:11,879 INFO L78 Accepts]: Start accepts. Automaton has 9161 states and 30685 transitions. Word has length 36 [2021-06-05 23:17:11,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:17:11,879 INFO L482 AbstractCegarLoop]: Abstraction has 9161 states and 30685 transitions. [2021-06-05 23:17:11,879 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:17:11,879 INFO L276 IsEmpty]: Start isEmpty. Operand 9161 states and 30685 transitions. [2021-06-05 23:17:11,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 23:17:11,889 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:17:11,889 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:17:12,089 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable511 [2021-06-05 23:17:12,089 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:17:12,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:17:12,090 INFO L82 PathProgramCache]: Analyzing trace with hash -117814139, now seen corresponding path program 58 times [2021-06-05 23:17:12,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:17:12,090 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147971103] [2021-06-05 23:17:12,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:17:12,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:17:12,400 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:17:12,400 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:17:12,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147971103] [2021-06-05 23:17:12,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147971103] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:17:12,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2120165800] [2021-06-05 23:17:12,401 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 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:17:12,425 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:17:12,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:17:12,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 23:17:12,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:17:13,192 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:17:13,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2120165800] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:17:13,192 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:17:13,192 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 37 [2021-06-05 23:17:13,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166103683] [2021-06-05 23:17:13,192 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 23:17:13,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:17:13,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 23:17:13,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=1147, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 23:17:13,193 INFO L87 Difference]: Start difference. First operand 9161 states and 30685 transitions. Second operand has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:17:14,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:17:14,612 INFO L93 Difference]: Finished difference Result 9978 states and 32867 transitions. [2021-06-05 23:17:14,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 23:17:14,613 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 23:17:14,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:17:14,660 INFO L225 Difference]: With dead ends: 9978 [2021-06-05 23:17:14,660 INFO L226 Difference]: Without dead ends: 9870 [2021-06-05 23:17:14,660 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1039 ImplicationChecksByTransitivity, 1694.6ms TimeCoverageRelationStatistics Valid=600, Invalid=2706, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 23:17:14,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9870 states. [2021-06-05 23:17:14,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9870 to 9245. [2021-06-05 23:17:14,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9245 states, 9244 states have (on average 3.3443314582431847) internal successors, (30915), 9244 states have internal predecessors, (30915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:17:14,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9245 states to 9245 states and 30915 transitions. [2021-06-05 23:17:14,775 INFO L78 Accepts]: Start accepts. Automaton has 9245 states and 30915 transitions. Word has length 36 [2021-06-05 23:17:14,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:17:14,775 INFO L482 AbstractCegarLoop]: Abstraction has 9245 states and 30915 transitions. [2021-06-05 23:17:14,775 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:17:14,775 INFO L276 IsEmpty]: Start isEmpty. Operand 9245 states and 30915 transitions. [2021-06-05 23:17:14,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 23:17:14,785 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:17:14,785 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:17:14,985 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable522,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:17:14,985 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:17:14,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:17:14,986 INFO L82 PathProgramCache]: Analyzing trace with hash -1178415995, now seen corresponding path program 59 times [2021-06-05 23:17:14,986 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:17:14,986 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210273750] [2021-06-05 23:17:14,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:17:14,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:17:15,287 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:17:15,287 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:17:15,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210273750] [2021-06-05 23:17:15,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210273750] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:17:15,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [219754617] [2021-06-05 23:17:15,287 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 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:17:15,311 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 23:17:15,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:17:15,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 23:17:15,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:17:15,922 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:17:15,922 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [219754617] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:17:15,922 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:17:15,922 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19] total 35 [2021-06-05 23:17:15,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252394543] [2021-06-05 23:17:15,923 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 23:17:15,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:17:15,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 23:17:15,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=1044, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 23:17:15,923 INFO L87 Difference]: Start difference. First operand 9245 states and 30915 transitions. Second operand has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:17:17,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:17:17,154 INFO L93 Difference]: Finished difference Result 11017 states and 36070 transitions. [2021-06-05 23:17:17,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 23:17:17,154 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 23:17:17,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:17:17,169 INFO L225 Difference]: With dead ends: 11017 [2021-06-05 23:17:17,170 INFO L226 Difference]: Without dead ends: 10963 [2021-06-05 23:17:17,170 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 803 ImplicationChecksByTransitivity, 1512.6ms TimeCoverageRelationStatistics Valid=519, Invalid=2451, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 23:17:17,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10963 states. [2021-06-05 23:17:17,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10963 to 9313. [2021-06-05 23:17:17,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9313 states, 9312 states have (on average 3.3385953608247423) internal successors, (31089), 9312 states have internal predecessors, (31089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:17:17,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9313 states to 9313 states and 31089 transitions. [2021-06-05 23:17:17,304 INFO L78 Accepts]: Start accepts. Automaton has 9313 states and 31089 transitions. Word has length 36 [2021-06-05 23:17:17,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:17:17,304 INFO L482 AbstractCegarLoop]: Abstraction has 9313 states and 31089 transitions. [2021-06-05 23:17:17,304 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:17:17,304 INFO L276 IsEmpty]: Start isEmpty. Operand 9313 states and 31089 transitions. [2021-06-05 23:17:17,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 23:17:17,314 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:17:17,314 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:17:17,516 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable533 [2021-06-05 23:17:17,516 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:17:17,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:17:17,516 INFO L82 PathProgramCache]: Analyzing trace with hash -2016343163, now seen corresponding path program 60 times [2021-06-05 23:17:17,516 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:17:17,516 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170331375] [2021-06-05 23:17:17,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:17:17,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:17:17,780 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:17:17,780 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:17:17,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170331375] [2021-06-05 23:17:17,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170331375] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:17:17,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [625851702] [2021-06-05 23:17:17,780 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 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:17:17,804 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 23:17:17,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:17:17,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 23:17:17,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:17:18,350 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:17:18,350 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [625851702] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:17:18,350 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:17:18,350 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-06-05 23:17:18,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706622523] [2021-06-05 23:17:18,350 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 23:17:18,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:17:18,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 23:17:18,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=1008, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 23:17:18,351 INFO L87 Difference]: Start difference. First operand 9313 states and 31089 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:17:20,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:17:20,598 INFO L93 Difference]: Finished difference Result 10574 states and 34626 transitions. [2021-06-05 23:17:20,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-05 23:17:20,599 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 23:17:20,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:17:20,613 INFO L225 Difference]: With dead ends: 10574 [2021-06-05 23:17:20,613 INFO L226 Difference]: Without dead ends: 10293 [2021-06-05 23:17:20,614 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 18 SyntacticMatches, 5 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1111 ImplicationChecksByTransitivity, 1777.1ms TimeCoverageRelationStatistics Valid=556, Invalid=3604, Unknown=0, NotChecked=0, Total=4160 [2021-06-05 23:17:20,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10293 states. [2021-06-05 23:17:20,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10293 to 9327. [2021-06-05 23:17:20,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9327 states, 9326 states have (on average 3.3374437057688184) internal successors, (31125), 9326 states have internal predecessors, (31125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:17:20,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9327 states to 9327 states and 31125 transitions. [2021-06-05 23:17:20,791 INFO L78 Accepts]: Start accepts. Automaton has 9327 states and 31125 transitions. Word has length 36 [2021-06-05 23:17:20,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:17:20,791 INFO L482 AbstractCegarLoop]: Abstraction has 9327 states and 31125 transitions. [2021-06-05 23:17:20,791 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:17:20,791 INFO L276 IsEmpty]: Start isEmpty. Operand 9327 states and 31125 transitions. [2021-06-05 23:17:20,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 23:17:20,801 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:17:20,801 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:17:21,004 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable537,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:17:21,005 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:17:21,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:17:21,005 INFO L82 PathProgramCache]: Analyzing trace with hash -455210879, now seen corresponding path program 61 times [2021-06-05 23:17:21,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:17:21,005 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986659335] [2021-06-05 23:17:21,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:17:21,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:17:21,302 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:17:21,302 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:17:21,302 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986659335] [2021-06-05 23:17:21,302 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986659335] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:17:21,302 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7647130] [2021-06-05 23:17:21,302 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:17:21,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:17:21,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 23:17:21,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:17:22,093 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:17:22,093 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [7647130] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:17:22,093 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:17:22,093 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 37 [2021-06-05 23:17:22,093 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563452258] [2021-06-05 23:17:22,093 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 23:17:22,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:17:22,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 23:17:22,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=234, Invalid=1172, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 23:17:22,094 INFO L87 Difference]: Start difference. First operand 9327 states and 31125 transitions. Second operand has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:17:23,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:17:23,874 INFO L93 Difference]: Finished difference Result 10820 states and 35312 transitions. [2021-06-05 23:17:23,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-05 23:17:23,874 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 23:17:23,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:17:23,889 INFO L225 Difference]: With dead ends: 10820 [2021-06-05 23:17:23,889 INFO L226 Difference]: Without dead ends: 10712 [2021-06-05 23:17:23,890 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1305 ImplicationChecksByTransitivity, 1933.5ms TimeCoverageRelationStatistics Valid=755, Invalid=3535, Unknown=0, NotChecked=0, Total=4290 [2021-06-05 23:17:23,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10712 states. [2021-06-05 23:17:24,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10712 to 9391. [2021-06-05 23:17:24,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9391 states, 9390 states have (on average 3.3338658146964857) internal successors, (31305), 9390 states have internal predecessors, (31305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:17:24,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9391 states to 9391 states and 31305 transitions. [2021-06-05 23:17:24,046 INFO L78 Accepts]: Start accepts. Automaton has 9391 states and 31305 transitions. Word has length 36 [2021-06-05 23:17:24,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:17:24,046 INFO L482 AbstractCegarLoop]: Abstraction has 9391 states and 31305 transitions. [2021-06-05 23:17:24,046 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:17:24,046 INFO L276 IsEmpty]: Start isEmpty. Operand 9391 states and 31305 transitions. [2021-06-05 23:17:24,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 23:17:24,056 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:17:24,056 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:17:24,257 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable541 [2021-06-05 23:17:24,257 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:17:24,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:17:24,258 INFO L82 PathProgramCache]: Analyzing trace with hash 1069723269, now seen corresponding path program 62 times [2021-06-05 23:17:24,258 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:17:24,258 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049026064] [2021-06-05 23:17:24,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:17:24,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:17:24,560 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:17:24,561 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:17:24,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049026064] [2021-06-05 23:17:24,561 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049026064] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:17:24,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639360475] [2021-06-05 23:17:24,561 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 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:17:24,583 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:17:24,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:17:24,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 23:17:24,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:17:25,306 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:17:25,306 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1639360475] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:17:25,306 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:17:25,306 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 17] total 35 [2021-06-05 23:17:25,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093050013] [2021-06-05 23:17:25,307 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 23:17:25,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:17:25,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 23:17:25,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=1036, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 23:17:25,307 INFO L87 Difference]: Start difference. First operand 9391 states and 31305 transitions. Second operand has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:17:29,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:17:29,268 INFO L93 Difference]: Finished difference Result 15459 states and 49301 transitions. [2021-06-05 23:17:29,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-06-05 23:17:29,268 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 23:17:29,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:17:29,289 INFO L225 Difference]: With dead ends: 15459 [2021-06-05 23:17:29,289 INFO L226 Difference]: Without dead ends: 15318 [2021-06-05 23:17:29,290 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2474 ImplicationChecksByTransitivity, 3205.9ms TimeCoverageRelationStatistics Valid=1225, Invalid=6607, Unknown=0, NotChecked=0, Total=7832 [2021-06-05 23:17:29,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15318 states. [2021-06-05 23:17:29,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15318 to 9405. [2021-06-05 23:17:29,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9405 states, 9404 states have (on average 3.336771586558911) internal successors, (31379), 9404 states have internal predecessors, (31379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:17:29,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9405 states to 9405 states and 31379 transitions. [2021-06-05 23:17:29,451 INFO L78 Accepts]: Start accepts. Automaton has 9405 states and 31379 transitions. Word has length 36 [2021-06-05 23:17:29,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:17:29,451 INFO L482 AbstractCegarLoop]: Abstraction has 9405 states and 31379 transitions. [2021-06-05 23:17:29,451 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:17:29,451 INFO L276 IsEmpty]: Start isEmpty. Operand 9405 states and 31379 transitions. [2021-06-05 23:17:29,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 23:17:29,461 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:17:29,461 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:17:29,661 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable552 [2021-06-05 23:17:29,662 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:17:29,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:17:29,662 INFO L82 PathProgramCache]: Analyzing trace with hash -819071103, now seen corresponding path program 63 times [2021-06-05 23:17:29,662 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:17:29,662 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17690968] [2021-06-05 23:17:29,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:17:29,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:17:29,965 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:17:29,966 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:17:29,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17690968] [2021-06-05 23:17:29,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17690968] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:17:29,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508008203] [2021-06-05 23:17:29,966 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 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:17:29,990 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 23:17:29,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:17:29,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 23:17:29,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:17:30,606 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:17:30,607 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [508008203] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:17:30,607 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:17:30,607 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 34 [2021-06-05 23:17:30,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349029836] [2021-06-05 23:17:30,607 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 23:17:30,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:17:30,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 23:17:30,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=1000, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 23:17:30,608 INFO L87 Difference]: Start difference. First operand 9405 states and 31379 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:17:33,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:17:33,818 INFO L93 Difference]: Finished difference Result 15173 states and 48503 transitions. [2021-06-05 23:17:33,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-06-05 23:17:33,818 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 23:17:33,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:17:33,838 INFO L225 Difference]: With dead ends: 15173 [2021-06-05 23:17:33,838 INFO L226 Difference]: Without dead ends: 15059 [2021-06-05 23:17:33,839 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1709 ImplicationChecksByTransitivity, 2424.7ms TimeCoverageRelationStatistics Valid=822, Invalid=5184, Unknown=0, NotChecked=0, Total=6006 [2021-06-05 23:17:33,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15059 states. [2021-06-05 23:17:34,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15059 to 9471. [2021-06-05 23:17:34,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9471 states, 9470 states have (on average 3.3367476240760294) internal successors, (31599), 9470 states have internal predecessors, (31599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:17:34,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9471 states to 9471 states and 31599 transitions. [2021-06-05 23:17:34,035 INFO L78 Accepts]: Start accepts. Automaton has 9471 states and 31599 transitions. Word has length 36 [2021-06-05 23:17:34,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:17:34,035 INFO L482 AbstractCegarLoop]: Abstraction has 9471 states and 31599 transitions. [2021-06-05 23:17:34,035 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:17:34,035 INFO L276 IsEmpty]: Start isEmpty. Operand 9471 states and 31599 transitions. [2021-06-05 23:17:34,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 23:17:34,045 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:17:34,045 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:17:34,248 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable561,63 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:17:34,249 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:17:34,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:17:34,249 INFO L82 PathProgramCache]: Analyzing trace with hash -1653259387, now seen corresponding path program 64 times [2021-06-05 23:17:34,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:17:34,249 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830882608] [2021-06-05 23:17:34,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:17:34,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:17:34,496 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:17:34,496 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:17:34,496 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830882608] [2021-06-05 23:17:34,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830882608] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:17:34,496 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1281592581] [2021-06-05 23:17:34,496 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 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:17:34,519 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:17:34,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:17:34,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 23:17:34,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:17:35,114 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:17:35,114 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1281592581] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:17:35,114 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:17:35,114 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 37 [2021-06-05 23:17:35,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393756480] [2021-06-05 23:17:35,114 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 23:17:35,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:17:35,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 23:17:35,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=1193, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 23:17:35,115 INFO L87 Difference]: Start difference. First operand 9471 states and 31599 transitions. Second operand has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:17:38,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:17:38,334 INFO L93 Difference]: Finished difference Result 16347 states and 51964 transitions. [2021-06-05 23:17:38,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-06-05 23:17:38,334 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 23:17:38,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:17:38,356 INFO L225 Difference]: With dead ends: 16347 [2021-06-05 23:17:38,356 INFO L226 Difference]: Without dead ends: 16075 [2021-06-05 23:17:38,357 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 16 SyntacticMatches, 5 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2536 ImplicationChecksByTransitivity, 2639.3ms TimeCoverageRelationStatistics Valid=1131, Invalid=6879, Unknown=0, NotChecked=0, Total=8010 [2021-06-05 23:17:38,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16075 states. [2021-06-05 23:17:38,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16075 to 9481. [2021-06-05 23:17:38,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9481 states, 9480 states have (on average 3.334704641350211) internal successors, (31613), 9480 states have internal predecessors, (31613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:17:38,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9481 states to 9481 states and 31613 transitions. [2021-06-05 23:17:38,524 INFO L78 Accepts]: Start accepts. Automaton has 9481 states and 31613 transitions. Word has length 36 [2021-06-05 23:17:38,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:17:38,524 INFO L482 AbstractCegarLoop]: Abstraction has 9481 states and 31613 transitions. [2021-06-05 23:17:38,525 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:17:38,525 INFO L276 IsEmpty]: Start isEmpty. Operand 9481 states and 31613 transitions. [2021-06-05 23:17:38,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 23:17:38,535 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:17:38,535 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:17:38,735 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable571,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:17:38,735 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:17:38,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:17:38,736 INFO L82 PathProgramCache]: Analyzing trace with hash -1349684095, now seen corresponding path program 65 times [2021-06-05 23:17:38,736 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:17:38,736 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636077425] [2021-06-05 23:17:38,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:17:38,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:17:38,981 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:17:38,982 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:17:38,982 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636077425] [2021-06-05 23:17:38,982 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636077425] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:17:38,982 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [953271370] [2021-06-05 23:17:38,982 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 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:17:39,004 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 23:17:39,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:17:39,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 23:17:39,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:17:39,609 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:17:39,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [953271370] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:17:39,609 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:17:39,609 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 37 [2021-06-05 23:17:39,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979612282] [2021-06-05 23:17:39,609 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 23:17:39,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:17:39,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 23:17:39,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=1190, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 23:17:39,610 INFO L87 Difference]: Start difference. First operand 9481 states and 31613 transitions. Second operand has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:17:43,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:17:43,650 INFO L93 Difference]: Finished difference Result 17046 states and 54034 transitions. [2021-06-05 23:17:43,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2021-06-05 23:17:43,650 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 23:17:43,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:17:43,674 INFO L225 Difference]: With dead ends: 17046 [2021-06-05 23:17:43,674 INFO L226 Difference]: Without dead ends: 16798 [2021-06-05 23:17:43,675 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 16 SyntacticMatches, 5 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3251 ImplicationChecksByTransitivity, 3170.6ms TimeCoverageRelationStatistics Valid=1396, Invalid=8704, Unknown=0, NotChecked=0, Total=10100 [2021-06-05 23:17:43,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16798 states. [2021-06-05 23:17:43,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16798 to 9516. [2021-06-05 23:17:43,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9516 states, 9515 states have (on average 3.333893851812927) internal successors, (31722), 9515 states have internal predecessors, (31722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:17:43,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9516 states to 9516 states and 31722 transitions. [2021-06-05 23:17:43,845 INFO L78 Accepts]: Start accepts. Automaton has 9516 states and 31722 transitions. Word has length 36 [2021-06-05 23:17:43,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:17:43,845 INFO L482 AbstractCegarLoop]: Abstraction has 9516 states and 31722 transitions. [2021-06-05 23:17:43,845 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:17:43,845 INFO L276 IsEmpty]: Start isEmpty. Operand 9516 states and 31722 transitions. [2021-06-05 23:17:43,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 23:17:43,856 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:17:43,856 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:17:44,056 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable575 [2021-06-05 23:17:44,056 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:17:44,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:17:44,057 INFO L82 PathProgramCache]: Analyzing trace with hash 834262405, now seen corresponding path program 66 times [2021-06-05 23:17:44,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:17:44,057 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286689538] [2021-06-05 23:17:44,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:17:44,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:17:44,325 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:17:44,325 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:17:44,325 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286689538] [2021-06-05 23:17:44,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286689538] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:17:44,325 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20730415] [2021-06-05 23:17:44,325 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 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:17:44,349 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 23:17:44,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:17:44,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 23:17:44,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:17:44,876 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:17:44,876 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [20730415] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:17:44,876 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:17:44,876 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 35 [2021-06-05 23:17:44,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462108485] [2021-06-05 23:17:44,876 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 23:17:44,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:17:44,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 23:17:44,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=1027, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 23:17:44,877 INFO L87 Difference]: Start difference. First operand 9516 states and 31722 transitions. Second operand has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:17:50,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:17:50,643 INFO L93 Difference]: Finished difference Result 18367 states and 57873 transitions. [2021-06-05 23:17:50,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2021-06-05 23:17:50,643 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 23:17:50,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:17:50,668 INFO L225 Difference]: With dead ends: 18367 [2021-06-05 23:17:50,668 INFO L226 Difference]: Without dead ends: 18184 [2021-06-05 23:17:50,669 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4586 ImplicationChecksByTransitivity, 4299.7ms TimeCoverageRelationStatistics Valid=1975, Invalid=11597, Unknown=0, NotChecked=0, Total=13572 [2021-06-05 23:17:50,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18184 states. [2021-06-05 23:17:50,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18184 to 9510. [2021-06-05 23:17:50,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9510 states, 9509 states have (on average 3.3346303501945527) internal successors, (31709), 9509 states have internal predecessors, (31709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:17:50,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9510 states to 9510 states and 31709 transitions. [2021-06-05 23:17:50,925 INFO L78 Accepts]: Start accepts. Automaton has 9510 states and 31709 transitions. Word has length 36 [2021-06-05 23:17:50,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:17:50,925 INFO L482 AbstractCegarLoop]: Abstraction has 9510 states and 31709 transitions. [2021-06-05 23:17:50,925 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:17:50,925 INFO L276 IsEmpty]: Start isEmpty. Operand 9510 states and 31709 transitions. [2021-06-05 23:17:50,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 23:17:50,936 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:17:50,936 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:17:51,136 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable579 [2021-06-05 23:17:51,136 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:17:51,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:17:51,137 INFO L82 PathProgramCache]: Analyzing trace with hash 1725411973, now seen corresponding path program 67 times [2021-06-05 23:17:51,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:17:51,137 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804952879] [2021-06-05 23:17:51,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:17:51,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:17:51,369 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:17:51,369 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:17:51,369 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804952879] [2021-06-05 23:17:51,369 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804952879] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:17:51,369 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [603519873] [2021-06-05 23:17:51,369 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 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:17:51,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:17:51,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 23:17:51,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:17:51,987 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:17:51,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [603519873] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:17:51,987 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:17:51,987 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2021-06-05 23:17:51,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720549042] [2021-06-05 23:17:51,987 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 23:17:51,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:17:51,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 23:17:51,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=1102, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 23:17:51,988 INFO L87 Difference]: Start difference. First operand 9510 states and 31709 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:17:53,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:17:53,763 INFO L93 Difference]: Finished difference Result 13786 states and 44215 transitions. [2021-06-05 23:17:53,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-05 23:17:53,763 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 23:17:53,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:17:53,781 INFO L225 Difference]: With dead ends: 13786 [2021-06-05 23:17:53,782 INFO L226 Difference]: Without dead ends: 13622 [2021-06-05 23:17:53,782 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1272 ImplicationChecksByTransitivity, 1748.4ms TimeCoverageRelationStatistics Valid=755, Invalid=3801, Unknown=0, NotChecked=0, Total=4556 [2021-06-05 23:17:53,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13622 states. [2021-06-05 23:17:53,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13622 to 9502. [2021-06-05 23:17:53,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9502 states, 9501 states have (on average 3.335333122829176) internal successors, (31689), 9501 states have internal predecessors, (31689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:17:53,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9502 states to 9502 states and 31689 transitions. [2021-06-05 23:17:53,986 INFO L78 Accepts]: Start accepts. Automaton has 9502 states and 31689 transitions. Word has length 36 [2021-06-05 23:17:53,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:17:53,986 INFO L482 AbstractCegarLoop]: Abstraction has 9502 states and 31689 transitions. [2021-06-05 23:17:53,986 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:17:53,986 INFO L276 IsEmpty]: Start isEmpty. Operand 9502 states and 31689 transitions. [2021-06-05 23:17:53,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 23:17:53,995 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:17:53,995 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:17:54,196 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable583,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:17:54,196 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:17:54,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:17:54,196 INFO L82 PathProgramCache]: Analyzing trace with hash 1597441409, now seen corresponding path program 68 times [2021-06-05 23:17:54,196 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:17:54,197 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228803629] [2021-06-05 23:17:54,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:17:54,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:17:54,426 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:17:54,426 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:17:54,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228803629] [2021-06-05 23:17:54,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1228803629] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:17:54,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2132200838] [2021-06-05 23:17:54,426 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 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:17:54,448 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:17:54,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:17:54,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 23:17:54,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:17:54,993 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:17:54,993 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2132200838] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:17:54,993 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:17:54,993 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 35 [2021-06-05 23:17:54,993 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009563220] [2021-06-05 23:17:54,994 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 23:17:54,994 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:17:54,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 23:17:54,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=1061, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 23:17:54,994 INFO L87 Difference]: Start difference. First operand 9502 states and 31689 transitions. Second operand has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:17:59,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:17:59,769 INFO L93 Difference]: Finished difference Result 14876 states and 47515 transitions. [2021-06-05 23:17:59,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2021-06-05 23:17:59,769 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 23:17:59,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:17:59,788 INFO L225 Difference]: With dead ends: 14876 [2021-06-05 23:17:59,789 INFO L226 Difference]: Without dead ends: 14655 [2021-06-05 23:17:59,789 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3007 ImplicationChecksByTransitivity, 3395.0ms TimeCoverageRelationStatistics Valid=1075, Invalid=8627, Unknown=0, NotChecked=0, Total=9702 [2021-06-05 23:17:59,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14655 states. [2021-06-05 23:17:59,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14655 to 9510. [2021-06-05 23:17:59,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9510 states, 9509 states have (on average 3.338416237248922) internal successors, (31745), 9509 states have internal predecessors, (31745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:17:59,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9510 states to 9510 states and 31745 transitions. [2021-06-05 23:17:59,940 INFO L78 Accepts]: Start accepts. Automaton has 9510 states and 31745 transitions. Word has length 36 [2021-06-05 23:17:59,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:17:59,940 INFO L482 AbstractCegarLoop]: Abstraction has 9510 states and 31745 transitions. [2021-06-05 23:17:59,940 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:17:59,940 INFO L276 IsEmpty]: Start isEmpty. Operand 9510 states and 31745 transitions. [2021-06-05 23:17:59,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 23:17:59,950 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:17:59,951 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:18:00,151 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable587 [2021-06-05 23:18:00,151 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:18:00,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:18:00,151 INFO L82 PathProgramCache]: Analyzing trace with hash 230155649, now seen corresponding path program 69 times [2021-06-05 23:18:00,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:18:00,151 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400000882] [2021-06-05 23:18:00,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:18:00,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:18:00,478 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:18:00,478 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:18:00,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400000882] [2021-06-05 23:18:00,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400000882] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:18:00,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1244193733] [2021-06-05 23:18:00,479 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 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:18:00,502 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 23:18:00,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:18:00,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 23:18:00,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:18:01,137 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:18:01,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1244193733] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:18:01,137 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:18:01,137 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 34 [2021-06-05 23:18:01,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485916231] [2021-06-05 23:18:01,137 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 23:18:01,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:18:01,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 23:18:01,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=951, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 23:18:01,138 INFO L87 Difference]: Start difference. First operand 9510 states and 31745 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:18:04,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:18:04,390 INFO L93 Difference]: Finished difference Result 16123 states and 51334 transitions. [2021-06-05 23:18:04,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-06-05 23:18:04,390 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 23:18:04,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:18:04,443 INFO L225 Difference]: With dead ends: 16123 [2021-06-05 23:18:04,443 INFO L226 Difference]: Without dead ends: 16003 [2021-06-05 23:18:04,443 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1889 ImplicationChecksByTransitivity, 2706.3ms TimeCoverageRelationStatistics Valid=1070, Invalid=5410, Unknown=0, NotChecked=0, Total=6480 [2021-06-05 23:18:04,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16003 states. [2021-06-05 23:18:04,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16003 to 9524. [2021-06-05 23:18:04,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9524 states, 9523 states have (on average 3.3400189016066366) internal successors, (31807), 9523 states have internal predecessors, (31807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:18:04,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9524 states to 9524 states and 31807 transitions. [2021-06-05 23:18:04,595 INFO L78 Accepts]: Start accepts. Automaton has 9524 states and 31807 transitions. Word has length 36 [2021-06-05 23:18:04,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:18:04,595 INFO L482 AbstractCegarLoop]: Abstraction has 9524 states and 31807 transitions. [2021-06-05 23:18:04,595 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:18:04,595 INFO L276 IsEmpty]: Start isEmpty. Operand 9524 states and 31807 transitions. [2021-06-05 23:18:04,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 23:18:04,605 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:18:04,606 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:18:04,806 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable591,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:18:04,806 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:18:04,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:18:04,806 INFO L82 PathProgramCache]: Analyzing trace with hash 537469825, now seen corresponding path program 70 times [2021-06-05 23:18:04,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:18:04,807 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405665003] [2021-06-05 23:18:04,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:18:04,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:18:05,042 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:18:05,042 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:18:05,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405665003] [2021-06-05 23:18:05,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405665003] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:18:05,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712716756] [2021-06-05 23:18:05,042 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 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:18:05,064 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:18:05,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:18:05,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 23:18:05,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:18:05,656 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:18:05,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1712716756] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:18:05,657 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:18:05,657 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2021-06-05 23:18:05,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543529093] [2021-06-05 23:18:05,657 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 23:18:05,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:18:05,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 23:18:05,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=1074, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 23:18:05,657 INFO L87 Difference]: Start difference. First operand 9524 states and 31807 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:18:10,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:18:10,049 INFO L93 Difference]: Finished difference Result 18630 states and 58802 transitions. [2021-06-05 23:18:10,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2021-06-05 23:18:10,049 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 23:18:10,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:18:10,074 INFO L225 Difference]: With dead ends: 18630 [2021-06-05 23:18:10,074 INFO L226 Difference]: Without dead ends: 18458 [2021-06-05 23:18:10,074 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 17 SyntacticMatches, 5 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3234 ImplicationChecksByTransitivity, 3415.6ms TimeCoverageRelationStatistics Valid=1708, Invalid=8392, Unknown=0, NotChecked=0, Total=10100 [2021-06-05 23:18:10,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18458 states. [2021-06-05 23:18:10,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18458 to 9524. [2021-06-05 23:18:10,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9524 states, 9523 states have (on average 3.3400189016066366) internal successors, (31807), 9523 states have internal predecessors, (31807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:18:10,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9524 states to 9524 states and 31807 transitions. [2021-06-05 23:18:10,272 INFO L78 Accepts]: Start accepts. Automaton has 9524 states and 31807 transitions. Word has length 36 [2021-06-05 23:18:10,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:18:10,273 INFO L482 AbstractCegarLoop]: Abstraction has 9524 states and 31807 transitions. [2021-06-05 23:18:10,273 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:18:10,273 INFO L276 IsEmpty]: Start isEmpty. Operand 9524 states and 31807 transitions. [2021-06-05 23:18:10,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 23:18:10,283 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:18:10,283 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:18:10,484 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable598 [2021-06-05 23:18:10,485 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:18:10,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:18:10,485 INFO L82 PathProgramCache]: Analyzing trace with hash -468984019, now seen corresponding path program 71 times [2021-06-05 23:18:10,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:18:10,485 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204436103] [2021-06-05 23:18:10,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:18:10,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:18:10,809 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:18:10,809 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:18:10,809 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204436103] [2021-06-05 23:18:10,809 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204436103] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:18:10,809 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959859847] [2021-06-05 23:18:10,809 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 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:18:10,832 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 23:18:10,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:18:10,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 23:18:10,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:18:11,541 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:18:11,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [959859847] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:18:11,541 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:18:11,541 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 37 [2021-06-05 23:18:11,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268186276] [2021-06-05 23:18:11,541 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 23:18:11,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:18:11,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 23:18:11,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=1214, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 23:18:11,542 INFO L87 Difference]: Start difference. First operand 9524 states and 31807 transitions. Second operand has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:18:12,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:18:12,534 INFO L93 Difference]: Finished difference Result 10252 states and 33744 transitions. [2021-06-05 23:18:12,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 23:18:12,535 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 23:18:12,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:18:12,548 INFO L225 Difference]: With dead ends: 10252 [2021-06-05 23:18:12,549 INFO L226 Difference]: Without dead ends: 10198 [2021-06-05 23:18:12,549 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 792 ImplicationChecksByTransitivity, 1380.3ms TimeCoverageRelationStatistics Valid=380, Invalid=2272, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 23:18:12,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10198 states. [2021-06-05 23:18:12,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10198 to 9524. [2021-06-05 23:18:12,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9524 states, 9523 states have (on average 3.3421190801218104) internal successors, (31827), 9523 states have internal predecessors, (31827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:18:12,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9524 states to 9524 states and 31827 transitions. [2021-06-05 23:18:12,676 INFO L78 Accepts]: Start accepts. Automaton has 9524 states and 31827 transitions. Word has length 36 [2021-06-05 23:18:12,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:18:12,676 INFO L482 AbstractCegarLoop]: Abstraction has 9524 states and 31827 transitions. [2021-06-05 23:18:12,676 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:18:12,676 INFO L276 IsEmpty]: Start isEmpty. Operand 9524 states and 31827 transitions. [2021-06-05 23:18:12,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 23:18:12,686 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:18:12,686 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:18:12,886 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable602 [2021-06-05 23:18:12,886 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:18:12,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:18:12,887 INFO L82 PathProgramCache]: Analyzing trace with hash 1927454253, now seen corresponding path program 72 times [2021-06-05 23:18:12,887 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:18:12,887 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788506145] [2021-06-05 23:18:12,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:18:12,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:18:13,189 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:18:13,189 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:18:13,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788506145] [2021-06-05 23:18:13,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1788506145] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:18:13,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791853791] [2021-06-05 23:18:13,189 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 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:18:13,213 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 23:18:13,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:18:13,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 23:18:13,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:18:13,818 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:18:13,819 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [791853791] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:18:13,819 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:18:13,819 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 34 [2021-06-05 23:18:13,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232789667] [2021-06-05 23:18:13,819 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 23:18:13,819 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:18:13,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 23:18:13,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=1035, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 23:18:13,819 INFO L87 Difference]: Start difference. First operand 9524 states and 31827 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:18:15,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:18:15,647 INFO L93 Difference]: Finished difference Result 10196 states and 33634 transitions. [2021-06-05 23:18:15,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 23:18:15,647 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 23:18:15,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:18:15,661 INFO L225 Difference]: With dead ends: 10196 [2021-06-05 23:18:15,661 INFO L226 Difference]: Without dead ends: 10082 [2021-06-05 23:18:15,661 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 673 ImplicationChecksByTransitivity, 1438.7ms TimeCoverageRelationStatistics Valid=368, Invalid=2388, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 23:18:15,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10082 states. [2021-06-05 23:18:15,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10082 to 9560. [2021-06-05 23:18:15,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9560 states, 9559 states have (on average 3.340830630819123) internal successors, (31935), 9559 states have internal predecessors, (31935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:18:15,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9560 states to 9560 states and 31935 transitions. [2021-06-05 23:18:15,790 INFO L78 Accepts]: Start accepts. Automaton has 9560 states and 31935 transitions. Word has length 36 [2021-06-05 23:18:15,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:18:15,790 INFO L482 AbstractCegarLoop]: Abstraction has 9560 states and 31935 transitions. [2021-06-05 23:18:15,790 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:18:15,790 INFO L276 IsEmpty]: Start isEmpty. Operand 9560 states and 31935 transitions. [2021-06-05 23:18:15,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 23:18:15,800 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:18:15,800 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:18:16,000 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable607,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:18:16,000 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:18:16,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:18:16,001 INFO L82 PathProgramCache]: Analyzing trace with hash 1089527085, now seen corresponding path program 73 times [2021-06-05 23:18:16,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:18:16,001 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277489465] [2021-06-05 23:18:16,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:18:16,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:18:16,229 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:18:16,229 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:18:16,229 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277489465] [2021-06-05 23:18:16,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1277489465] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:18:16,229 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629281423] [2021-06-05 23:18:16,229 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 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:18:16,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:18:16,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 23:18:16,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:18:16,832 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:18:16,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1629281423] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:18:16,833 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:18:16,833 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2021-06-05 23:18:16,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549207466] [2021-06-05 23:18:16,833 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 23:18:16,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:18:16,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 23:18:16,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=1134, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 23:18:16,833 INFO L87 Difference]: Start difference. First operand 9560 states and 31935 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:18:18,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:18:18,357 INFO L93 Difference]: Finished difference Result 10336 states and 34015 transitions. [2021-06-05 23:18:18,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 23:18:18,357 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 23:18:18,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:18:18,373 INFO L225 Difference]: With dead ends: 10336 [2021-06-05 23:18:18,373 INFO L226 Difference]: Without dead ends: 10156 [2021-06-05 23:18:18,374 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 16 SyntacticMatches, 5 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 887 ImplicationChecksByTransitivity, 1356.7ms TimeCoverageRelationStatistics Valid=466, Invalid=2726, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 23:18:18,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10156 states. [2021-06-05 23:18:18,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10156 to 9528. [2021-06-05 23:18:18,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9528 states, 9527 states have (on average 3.3432350162695497) internal successors, (31851), 9527 states have internal predecessors, (31851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:18:18,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9528 states to 9528 states and 31851 transitions. [2021-06-05 23:18:18,518 INFO L78 Accepts]: Start accepts. Automaton has 9528 states and 31851 transitions. Word has length 36 [2021-06-05 23:18:18,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:18:18,518 INFO L482 AbstractCegarLoop]: Abstraction has 9528 states and 31851 transitions. [2021-06-05 23:18:18,518 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:18:18,518 INFO L276 IsEmpty]: Start isEmpty. Operand 9528 states and 31851 transitions. [2021-06-05 23:18:18,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 23:18:18,530 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:18:18,530 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:18:18,730 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable617,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:18:18,730 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:18:18,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:18:18,730 INFO L82 PathProgramCache]: Analyzing trace with hash -465824463, now seen corresponding path program 74 times [2021-06-05 23:18:18,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:18:18,731 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696400712] [2021-06-05 23:18:18,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:18:18,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:18:19,059 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:18:19,059 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:18:19,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696400712] [2021-06-05 23:18:19,059 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696400712] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:18:19,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [159470735] [2021-06-05 23:18:19,059 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:18:19,082 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:18:19,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:18:19,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 23:18:19,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:18:19,768 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:18:19,769 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [159470735] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:18:19,769 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:18:19,769 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 17] total 35 [2021-06-05 23:18:19,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859654129] [2021-06-05 23:18:19,769 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 23:18:19,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:18:19,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 23:18:19,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=1084, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 23:18:19,770 INFO L87 Difference]: Start difference. First operand 9528 states and 31851 transitions. Second operand has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:18:22,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:18:22,977 INFO L93 Difference]: Finished difference Result 13472 states and 43399 transitions. [2021-06-05 23:18:22,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-06-05 23:18:22,978 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 23:18:22,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:18:22,996 INFO L225 Difference]: With dead ends: 13472 [2021-06-05 23:18:22,997 INFO L226 Difference]: Without dead ends: 13358 [2021-06-05 23:18:22,997 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1781 ImplicationChecksByTransitivity, 2594.1ms TimeCoverageRelationStatistics Valid=799, Invalid=5207, Unknown=0, NotChecked=0, Total=6006 [2021-06-05 23:18:23,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13358 states. [2021-06-05 23:18:23,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13358 to 9512. [2021-06-05 23:18:23,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9512 states, 9511 states have (on average 3.344232993376091) internal successors, (31807), 9511 states have internal predecessors, (31807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:18:23,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9512 states to 9512 states and 31807 transitions. [2021-06-05 23:18:23,153 INFO L78 Accepts]: Start accepts. Automaton has 9512 states and 31807 transitions. Word has length 36 [2021-06-05 23:18:23,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:18:23,153 INFO L482 AbstractCegarLoop]: Abstraction has 9512 states and 31807 transitions. [2021-06-05 23:18:23,153 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:18:23,153 INFO L276 IsEmpty]: Start isEmpty. Operand 9512 states and 31807 transitions. [2021-06-05 23:18:23,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 23:18:23,165 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:18:23,165 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:18:23,365 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable621,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:18:23,365 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:18:23,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:18:23,365 INFO L82 PathProgramCache]: Analyzing trace with hash -701219795, now seen corresponding path program 75 times [2021-06-05 23:18:23,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:18:23,366 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626411283] [2021-06-05 23:18:23,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:18:23,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:18:23,717 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:18:23,718 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:18:23,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626411283] [2021-06-05 23:18:23,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626411283] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:18:23,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1493511198] [2021-06-05 23:18:23,718 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 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:18:23,753 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 23:18:23,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:18:23,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 23:18:23,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:18:24,476 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:18:24,476 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1493511198] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:18:24,476 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:18:24,476 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 17] total 36 [2021-06-05 23:18:24,476 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948180770] [2021-06-05 23:18:24,476 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 23:18:24,476 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:18:24,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 23:18:24,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=240, Invalid=1092, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 23:18:24,477 INFO L87 Difference]: Start difference. First operand 9512 states and 31807 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:18:28,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:18:28,473 INFO L93 Difference]: Finished difference Result 16362 states and 52136 transitions. [2021-06-05 23:18:28,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-06-05 23:18:28,474 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 23:18:28,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:18:28,495 INFO L225 Difference]: With dead ends: 16362 [2021-06-05 23:18:28,495 INFO L226 Difference]: Without dead ends: 16221 [2021-06-05 23:18:28,496 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2905 ImplicationChecksByTransitivity, 3383.3ms TimeCoverageRelationStatistics Valid=1441, Invalid=7489, Unknown=0, NotChecked=0, Total=8930 [2021-06-05 23:18:28,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16221 states. [2021-06-05 23:18:28,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16221 to 9564. [2021-06-05 23:18:28,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9564 states, 9563 states have (on average 3.3460211230785317) internal successors, (31998), 9563 states have internal predecessors, (31998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:18:28,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9564 states to 9564 states and 31998 transitions. [2021-06-05 23:18:28,663 INFO L78 Accepts]: Start accepts. Automaton has 9564 states and 31998 transitions. Word has length 36 [2021-06-05 23:18:28,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:18:28,663 INFO L482 AbstractCegarLoop]: Abstraction has 9564 states and 31998 transitions. [2021-06-05 23:18:28,663 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:18:28,663 INFO L276 IsEmpty]: Start isEmpty. Operand 9564 states and 31998 transitions. [2021-06-05 23:18:28,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 23:18:28,674 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:18:28,674 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:18:28,874 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable632 [2021-06-05 23:18:28,874 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:18:28,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:18:28,875 INFO L82 PathProgramCache]: Analyzing trace with hash -1236506063, now seen corresponding path program 76 times [2021-06-05 23:18:28,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:18:28,875 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202108811] [2021-06-05 23:18:28,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:18:28,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:18:29,112 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:18:29,112 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:18:29,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202108811] [2021-06-05 23:18:29,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202108811] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:18:29,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [749484151] [2021-06-05 23:18:29,112 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 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:18:29,135 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:18:29,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:18:29,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 23:18:29,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:18:29,718 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:18:29,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [749484151] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:18:29,718 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:18:29,718 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 37 [2021-06-05 23:18:29,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688761397] [2021-06-05 23:18:29,718 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 23:18:29,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:18:29,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 23:18:29,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=1199, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 23:18:29,719 INFO L87 Difference]: Start difference. First operand 9564 states and 31998 transitions. Second operand has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:18:31,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:18:31,727 INFO L93 Difference]: Finished difference Result 14020 states and 45032 transitions. [2021-06-05 23:18:31,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-05 23:18:31,727 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 23:18:31,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:18:31,746 INFO L225 Difference]: With dead ends: 14020 [2021-06-05 23:18:31,747 INFO L226 Difference]: Without dead ends: 13808 [2021-06-05 23:18:31,747 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 16 SyntacticMatches, 4 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1607 ImplicationChecksByTransitivity, 1847.6ms TimeCoverageRelationStatistics Valid=736, Invalid=4520, Unknown=0, NotChecked=0, Total=5256 [2021-06-05 23:18:31,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13808 states. [2021-06-05 23:18:31,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13808 to 9532. [2021-06-05 23:18:31,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9532 states, 9531 states have (on average 3.348861609484839) internal successors, (31918), 9531 states have internal predecessors, (31918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:18:31,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9532 states to 9532 states and 31918 transitions. [2021-06-05 23:18:31,897 INFO L78 Accepts]: Start accepts. Automaton has 9532 states and 31918 transitions. Word has length 36 [2021-06-05 23:18:31,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:18:31,897 INFO L482 AbstractCegarLoop]: Abstraction has 9532 states and 31918 transitions. [2021-06-05 23:18:31,897 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:18:31,898 INFO L276 IsEmpty]: Start isEmpty. Operand 9532 states and 31918 transitions. [2021-06-05 23:18:31,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 23:18:31,907 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:18:31,908 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:18:32,109 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable641 [2021-06-05 23:18:32,109 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:18:32,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:18:32,109 INFO L82 PathProgramCache]: Analyzing trace with hash -1558426579, now seen corresponding path program 77 times [2021-06-05 23:18:32,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:18:32,109 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832783550] [2021-06-05 23:18:32,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:18:32,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:18:32,348 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:18:32,349 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:18:32,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832783550] [2021-06-05 23:18:32,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832783550] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:18:32,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [838941068] [2021-06-05 23:18:32,349 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 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:18:32,373 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 23:18:32,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:18:32,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 23:18:32,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:18:32,943 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:18:32,943 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [838941068] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:18:32,943 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:18:32,943 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 37 [2021-06-05 23:18:32,943 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132827907] [2021-06-05 23:18:32,943 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 23:18:32,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:18:32,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 23:18:32,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=1196, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 23:18:32,944 INFO L87 Difference]: Start difference. First operand 9532 states and 31918 transitions. Second operand has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:18:35,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:18:35,434 INFO L93 Difference]: Finished difference Result 14454 states and 46414 transitions. [2021-06-05 23:18:35,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-05 23:18:35,434 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 23:18:35,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:18:35,455 INFO L225 Difference]: With dead ends: 14454 [2021-06-05 23:18:35,455 INFO L226 Difference]: Without dead ends: 14270 [2021-06-05 23:18:35,456 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 16 SyntacticMatches, 4 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1920 ImplicationChecksByTransitivity, 2096.4ms TimeCoverageRelationStatistics Valid=874, Invalid=5288, Unknown=0, NotChecked=0, Total=6162 [2021-06-05 23:18:35,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14270 states. [2021-06-05 23:18:35,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14270 to 9504. [2021-06-05 23:18:35,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9504 states, 9503 states have (on average 3.351994107124066) internal successors, (31854), 9503 states have internal predecessors, (31854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:18:35,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9504 states to 9504 states and 31854 transitions. [2021-06-05 23:18:35,609 INFO L78 Accepts]: Start accepts. Automaton has 9504 states and 31854 transitions. Word has length 36 [2021-06-05 23:18:35,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:18:35,609 INFO L482 AbstractCegarLoop]: Abstraction has 9504 states and 31854 transitions. [2021-06-05 23:18:35,609 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:18:35,609 INFO L276 IsEmpty]: Start isEmpty. Operand 9504 states and 31854 transitions. [2021-06-05 23:18:35,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 23:18:35,619 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:18:35,619 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:18:35,820 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable645,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:18:35,820 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:18:35,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:18:35,820 INFO L82 PathProgramCache]: Analyzing trace with hash -819004623, now seen corresponding path program 78 times [2021-06-05 23:18:35,820 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:18:35,820 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717328585] [2021-06-05 23:18:35,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:18:35,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:18:36,060 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:18:36,061 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:18:36,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717328585] [2021-06-05 23:18:36,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717328585] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:18:36,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [603880068] [2021-06-05 23:18:36,061 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 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:18:36,084 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 23:18:36,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:18:36,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 23:18:36,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:18:36,614 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:18:36,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [603880068] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:18:36,614 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:18:36,614 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 36 [2021-06-05 23:18:36,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657537820] [2021-06-05 23:18:36,614 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 23:18:36,615 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:18:36,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 23:18:36,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=1133, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 23:18:36,615 INFO L87 Difference]: Start difference. First operand 9504 states and 31854 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:18:41,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:18:41,509 INFO L93 Difference]: Finished difference Result 16078 states and 51312 transitions. [2021-06-05 23:18:41,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2021-06-05 23:18:41,509 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 23:18:41,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:18:41,528 INFO L225 Difference]: With dead ends: 16078 [2021-06-05 23:18:41,528 INFO L226 Difference]: Without dead ends: 15779 [2021-06-05 23:18:41,528 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3988 ImplicationChecksByTransitivity, 3663.6ms TimeCoverageRelationStatistics Valid=1235, Invalid=10537, Unknown=0, NotChecked=0, Total=11772 [2021-06-05 23:18:41,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15779 states. [2021-06-05 23:18:41,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15779 to 9476. [2021-06-05 23:18:41,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9476 states, 9475 states have (on average 3.35155672823219) internal successors, (31756), 9475 states have internal predecessors, (31756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:18:41,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9476 states to 9476 states and 31756 transitions. [2021-06-05 23:18:41,683 INFO L78 Accepts]: Start accepts. Automaton has 9476 states and 31756 transitions. Word has length 36 [2021-06-05 23:18:41,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:18:41,683 INFO L482 AbstractCegarLoop]: Abstraction has 9476 states and 31756 transitions. [2021-06-05 23:18:41,683 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:18:41,683 INFO L276 IsEmpty]: Start isEmpty. Operand 9476 states and 31756 transitions. [2021-06-05 23:18:41,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 23:18:41,693 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:18:41,693 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:18:41,894 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable649 [2021-06-05 23:18:41,894 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:18:41,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:18:41,894 INFO L82 PathProgramCache]: Analyzing trace with hash 181846573, now seen corresponding path program 79 times [2021-06-05 23:18:41,894 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:18:41,894 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060767792] [2021-06-05 23:18:41,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:18:41,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:18:42,161 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:18:42,161 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:18:42,161 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060767792] [2021-06-05 23:18:42,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060767792] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:18:42,161 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [379530847] [2021-06-05 23:18:42,161 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 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:18:42,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:18:42,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 23:18:42,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:18:42,813 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:18:42,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [379530847] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:18:42,814 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:18:42,814 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 38 [2021-06-05 23:18:42,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533850978] [2021-06-05 23:18:42,814 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 23:18:42,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:18:42,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 23:18:42,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=1269, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 23:18:42,814 INFO L87 Difference]: Start difference. First operand 9476 states and 31756 transitions. Second operand has 39 states, 39 states have (on average 1.794871794871795) internal successors, (70), 38 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:18:46,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:18:46,850 INFO L93 Difference]: Finished difference Result 16847 states and 53541 transitions. [2021-06-05 23:18:46,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2021-06-05 23:18:46,850 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.794871794871795) internal successors, (70), 38 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 23:18:46,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:18:46,873 INFO L225 Difference]: With dead ends: 16847 [2021-06-05 23:18:46,873 INFO L226 Difference]: Without dead ends: 16599 [2021-06-05 23:18:46,874 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 15 SyntacticMatches, 5 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3251 ImplicationChecksByTransitivity, 3165.0ms TimeCoverageRelationStatistics Valid=1311, Invalid=8789, Unknown=0, NotChecked=0, Total=10100 [2021-06-05 23:18:46,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16599 states. [2021-06-05 23:18:47,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16599 to 9476. [2021-06-05 23:18:47,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9476 states, 9475 states have (on average 3.350817941952507) internal successors, (31749), 9475 states have internal predecessors, (31749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:18:47,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9476 states to 9476 states and 31749 transitions. [2021-06-05 23:18:47,051 INFO L78 Accepts]: Start accepts. Automaton has 9476 states and 31749 transitions. Word has length 36 [2021-06-05 23:18:47,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:18:47,051 INFO L482 AbstractCegarLoop]: Abstraction has 9476 states and 31749 transitions. [2021-06-05 23:18:47,051 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.794871794871795) internal successors, (70), 38 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:18:47,051 INFO L276 IsEmpty]: Start isEmpty. Operand 9476 states and 31749 transitions. [2021-06-05 23:18:47,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 23:18:47,061 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:18:47,061 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:18:47,262 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable653 [2021-06-05 23:18:47,262 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:18:47,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:18:47,262 INFO L82 PathProgramCache]: Analyzing trace with hash -1929174223, now seen corresponding path program 80 times [2021-06-05 23:18:47,262 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:18:47,262 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851557777] [2021-06-05 23:18:47,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:18:47,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:18:47,562 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:18:47,562 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:18:47,563 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851557777] [2021-06-05 23:18:47,563 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851557777] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:18:47,563 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [575870645] [2021-06-05 23:18:47,563 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 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:18:47,584 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:18:47,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:18:47,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 23:18:47,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:18:48,146 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:18:48,146 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [575870645] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:18:48,146 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:18:48,146 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 36 [2021-06-05 23:18:48,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579603452] [2021-06-05 23:18:48,147 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 23:18:48,147 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:18:48,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 23:18:48,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=232, Invalid=1100, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 23:18:48,147 INFO L87 Difference]: Start difference. First operand 9476 states and 31749 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:18:54,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:18:54,014 INFO L93 Difference]: Finished difference Result 18120 states and 57307 transitions. [2021-06-05 23:18:54,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2021-06-05 23:18:54,014 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 23:18:54,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:18:54,038 INFO L225 Difference]: With dead ends: 18120 [2021-06-05 23:18:54,038 INFO L226 Difference]: Without dead ends: 17937 [2021-06-05 23:18:54,039 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 17 SyntacticMatches, 5 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4717 ImplicationChecksByTransitivity, 4381.6ms TimeCoverageRelationStatistics Valid=1926, Invalid=11880, Unknown=0, NotChecked=0, Total=13806 [2021-06-05 23:18:54,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17937 states. [2021-06-05 23:18:54,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17937 to 9447. [2021-06-05 23:18:54,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9447 states, 9446 states have (on average 3.34977768367563) internal successors, (31642), 9446 states have internal predecessors, (31642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:18:54,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9447 states to 9447 states and 31642 transitions. [2021-06-05 23:18:54,278 INFO L78 Accepts]: Start accepts. Automaton has 9447 states and 31642 transitions. Word has length 36 [2021-06-05 23:18:54,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:18:54,279 INFO L482 AbstractCegarLoop]: Abstraction has 9447 states and 31642 transitions. [2021-06-05 23:18:54,279 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:18:54,279 INFO L276 IsEmpty]: Start isEmpty. Operand 9447 states and 31642 transitions. [2021-06-05 23:18:54,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 23:18:54,288 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:18:54,288 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:18:54,489 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable657,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:18:54,489 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:18:54,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:18:54,489 INFO L82 PathProgramCache]: Analyzing trace with hash 1421770865, now seen corresponding path program 81 times [2021-06-05 23:18:54,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:18:54,489 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191328458] [2021-06-05 23:18:54,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:18:54,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:18:54,840 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:18:54,840 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:18:54,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191328458] [2021-06-05 23:18:54,840 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191328458] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:18:54,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1427814534] [2021-06-05 23:18:54,840 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 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:18:54,863 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 23:18:54,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:18:54,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 23:18:54,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:18:55,522 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:18:55,522 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1427814534] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:18:55,522 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:18:55,522 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 17] total 35 [2021-06-05 23:18:55,522 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89782737] [2021-06-05 23:18:55,522 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 23:18:55,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:18:55,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 23:18:55,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=1036, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 23:18:55,523 INFO L87 Difference]: Start difference. First operand 9447 states and 31642 transitions. Second operand has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:18:59,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:18:59,079 INFO L93 Difference]: Finished difference Result 18867 states and 60832 transitions. [2021-06-05 23:18:59,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-06-05 23:18:59,079 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 23:18:59,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:18:59,106 INFO L225 Difference]: With dead ends: 18867 [2021-06-05 23:18:59,106 INFO L226 Difference]: Without dead ends: 18741 [2021-06-05 23:18:59,107 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2437 ImplicationChecksByTransitivity, 3120.2ms TimeCoverageRelationStatistics Valid=1200, Invalid=6632, Unknown=0, NotChecked=0, Total=7832 [2021-06-05 23:18:59,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18741 states. [2021-06-05 23:18:59,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18741 to 9611. [2021-06-05 23:18:59,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9611 states, 9610 states have (on average 3.3521331945889696) internal successors, (32214), 9610 states have internal predecessors, (32214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:18:59,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9611 states to 9611 states and 32214 transitions. [2021-06-05 23:18:59,297 INFO L78 Accepts]: Start accepts. Automaton has 9611 states and 32214 transitions. Word has length 36 [2021-06-05 23:18:59,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:18:59,298 INFO L482 AbstractCegarLoop]: Abstraction has 9611 states and 32214 transitions. [2021-06-05 23:18:59,298 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:18:59,298 INFO L276 IsEmpty]: Start isEmpty. Operand 9611 states and 32214 transitions. [2021-06-05 23:18:59,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 23:18:59,316 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:18:59,317 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:18:59,518 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable661 [2021-06-05 23:18:59,518 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:18:59,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:18:59,518 INFO L82 PathProgramCache]: Analyzing trace with hash 1054229233, now seen corresponding path program 82 times [2021-06-05 23:18:59,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:18:59,518 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434695525] [2021-06-05 23:18:59,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:18:59,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:18:59,841 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:18:59,841 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:18:59,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434695525] [2021-06-05 23:18:59,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434695525] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:18:59,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2038729260] [2021-06-05 23:18:59,841 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 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:18:59,863 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:18:59,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:18:59,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 23:18:59,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:19:00,613 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:19:00,613 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2038729260] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:19:00,613 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:19:00,613 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2021-06-05 23:19:00,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632805288] [2021-06-05 23:19:00,613 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 23:19:00,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:19:00,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 23:19:00,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=1150, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 23:19:00,614 INFO L87 Difference]: Start difference. First operand 9611 states and 32214 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:19:01,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:19:01,966 INFO L93 Difference]: Finished difference Result 12393 states and 40388 transitions. [2021-06-05 23:19:01,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 23:19:01,966 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 23:19:01,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:19:01,984 INFO L225 Difference]: With dead ends: 12393 [2021-06-05 23:19:01,984 INFO L226 Difference]: Without dead ends: 12305 [2021-06-05 23:19:01,984 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 827 ImplicationChecksByTransitivity, 1651.5ms TimeCoverageRelationStatistics Valid=518, Invalid=2904, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 23:19:01,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12305 states. [2021-06-05 23:19:02,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12305 to 9755. [2021-06-05 23:19:02,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9755 states, 9754 states have (on average 3.352778347344679) internal successors, (32703), 9754 states have internal predecessors, (32703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:19:02,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9755 states to 9755 states and 32703 transitions. [2021-06-05 23:19:02,128 INFO L78 Accepts]: Start accepts. Automaton has 9755 states and 32703 transitions. Word has length 36 [2021-06-05 23:19:02,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:19:02,128 INFO L482 AbstractCegarLoop]: Abstraction has 9755 states and 32703 transitions. [2021-06-05 23:19:02,128 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:19:02,128 INFO L276 IsEmpty]: Start isEmpty. Operand 9755 states and 32703 transitions. [2021-06-05 23:19:02,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 23:19:02,138 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:19:02,138 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:19:02,339 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable673 [2021-06-05 23:19:02,339 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:19:02,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:19:02,339 INFO L82 PathProgramCache]: Analyzing trace with hash -973016591, now seen corresponding path program 83 times [2021-06-05 23:19:02,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:19:02,339 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577022638] [2021-06-05 23:19:02,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:19:02,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:19:02,671 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:19:02,671 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:19:02,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577022638] [2021-06-05 23:19:02,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577022638] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:19:02,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [371783598] [2021-06-05 23:19:02,671 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:19:02,695 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 23:19:02,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:19:02,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 23:19:02,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:19:03,305 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:19:03,305 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [371783598] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:19:03,305 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:19:03,305 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 35 [2021-06-05 23:19:03,305 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276537428] [2021-06-05 23:19:03,305 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 23:19:03,305 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:19:03,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 23:19:03,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=1035, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 23:19:03,306 INFO L87 Difference]: Start difference. First operand 9755 states and 32703 transitions. Second operand has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:19:06,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:19:06,438 INFO L93 Difference]: Finished difference Result 16119 states and 52115 transitions. [2021-06-05 23:19:06,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-06-05 23:19:06,439 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 23:19:06,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:19:06,461 INFO L225 Difference]: With dead ends: 16119 [2021-06-05 23:19:06,461 INFO L226 Difference]: Without dead ends: 16030 [2021-06-05 23:19:06,462 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2000 ImplicationChecksByTransitivity, 2810.7ms TimeCoverageRelationStatistics Valid=1169, Invalid=4993, Unknown=0, NotChecked=0, Total=6162 [2021-06-05 23:19:06,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16030 states. [2021-06-05 23:19:06,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16030 to 9777. [2021-06-05 23:19:06,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9777 states, 9776 states have (on average 3.3548486088379708) internal successors, (32797), 9776 states have internal predecessors, (32797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:19:06,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9777 states to 9777 states and 32797 transitions. [2021-06-05 23:19:06,633 INFO L78 Accepts]: Start accepts. Automaton has 9777 states and 32797 transitions. Word has length 36 [2021-06-05 23:19:06,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:19:06,633 INFO L482 AbstractCegarLoop]: Abstraction has 9777 states and 32797 transitions. [2021-06-05 23:19:06,633 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:19:06,633 INFO L276 IsEmpty]: Start isEmpty. Operand 9777 states and 32797 transitions. [2021-06-05 23:19:06,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 23:19:06,644 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:19:06,644 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:19:06,844 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable682,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:19:06,844 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:19:06,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:19:06,845 INFO L82 PathProgramCache]: Analyzing trace with hash -177869115, now seen corresponding path program 84 times [2021-06-05 23:19:06,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:19:06,845 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105657286] [2021-06-05 23:19:06,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:19:06,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:19:07,155 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:19:07,155 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:19:07,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105657286] [2021-06-05 23:19:07,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105657286] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:19:07,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1900804847] [2021-06-05 23:19:07,155 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:19:07,179 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 23:19:07,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:19:07,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 23:19:07,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:19:07,841 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:19:07,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1900804847] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:19:07,841 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:19:07,841 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 33 [2021-06-05 23:19:07,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816360381] [2021-06-05 23:19:07,842 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 23:19:07,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:19:07,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 23:19:07,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=941, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 23:19:07,842 INFO L87 Difference]: Start difference. First operand 9777 states and 32797 transitions. Second operand has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:19:09,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:19:09,247 INFO L93 Difference]: Finished difference Result 11889 states and 39337 transitions. [2021-06-05 23:19:09,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 23:19:09,248 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 23:19:09,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:19:09,264 INFO L225 Difference]: With dead ends: 11889 [2021-06-05 23:19:09,264 INFO L226 Difference]: Without dead ends: 11769 [2021-06-05 23:19:09,265 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 599 ImplicationChecksByTransitivity, 1414.2ms TimeCoverageRelationStatistics Valid=435, Invalid=2115, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 23:19:09,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11769 states. [2021-06-05 23:19:09,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11769 to 9821. [2021-06-05 23:19:09,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9821 states, 9820 states have (on average 3.355906313645621) internal successors, (32955), 9820 states have internal predecessors, (32955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:19:09,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9821 states to 9821 states and 32955 transitions. [2021-06-05 23:19:09,409 INFO L78 Accepts]: Start accepts. Automaton has 9821 states and 32955 transitions. Word has length 36 [2021-06-05 23:19:09,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:19:09,409 INFO L482 AbstractCegarLoop]: Abstraction has 9821 states and 32955 transitions. [2021-06-05 23:19:09,409 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:19:09,409 INFO L276 IsEmpty]: Start isEmpty. Operand 9821 states and 32955 transitions. [2021-06-05 23:19:09,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 23:19:09,420 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:19:09,420 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:19:09,620 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable687,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:19:09,621 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:19:09,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:19:09,621 INFO L82 PathProgramCache]: Analyzing trace with hash -247979151, now seen corresponding path program 85 times [2021-06-05 23:19:09,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:19:09,621 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615707882] [2021-06-05 23:19:09,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:19:09,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:19:09,940 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:19:09,940 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:19:09,941 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615707882] [2021-06-05 23:19:09,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1615707882] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:19:09,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251793669] [2021-06-05 23:19:09,948 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:19:09,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:19:09,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 23:19:09,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:19:10,666 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:19:10,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1251793669] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:19:10,666 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:19:10,666 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-06-05 23:19:10,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121594696] [2021-06-05 23:19:10,666 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 23:19:10,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:19:10,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 23:19:10,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=1000, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 23:19:10,667 INFO L87 Difference]: Start difference. First operand 9821 states and 32955 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:19:12,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:19:12,061 INFO L93 Difference]: Finished difference Result 11087 states and 36748 transitions. [2021-06-05 23:19:12,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 23:19:12,062 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 23:19:12,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:19:12,077 INFO L225 Difference]: With dead ends: 11087 [2021-06-05 23:19:12,077 INFO L226 Difference]: Without dead ends: 10967 [2021-06-05 23:19:12,078 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 615 ImplicationChecksByTransitivity, 1469.5ms TimeCoverageRelationStatistics Valid=436, Invalid=2114, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 23:19:12,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10967 states. [2021-06-05 23:19:12,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10967 to 9829. [2021-06-05 23:19:12,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9829 states, 9828 states have (on average 3.3556166056166057) internal successors, (32979), 9828 states have internal predecessors, (32979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:19:12,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9829 states to 9829 states and 32979 transitions. [2021-06-05 23:19:12,215 INFO L78 Accepts]: Start accepts. Automaton has 9829 states and 32979 transitions. Word has length 36 [2021-06-05 23:19:12,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:19:12,216 INFO L482 AbstractCegarLoop]: Abstraction has 9829 states and 32979 transitions. [2021-06-05 23:19:12,216 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:19:12,216 INFO L276 IsEmpty]: Start isEmpty. Operand 9829 states and 32979 transitions. [2021-06-05 23:19:12,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 23:19:12,227 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:19:12,227 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:19:12,443 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable699 [2021-06-05 23:19:12,444 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:19:12,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:19:12,444 INFO L82 PathProgramCache]: Analyzing trace with hash 1232893229, now seen corresponding path program 86 times [2021-06-05 23:19:12,444 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:19:12,444 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329240641] [2021-06-05 23:19:12,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:19:12,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:19:12,753 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:19:12,753 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:19:12,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329240641] [2021-06-05 23:19:12,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329240641] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:19:12,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1891525383] [2021-06-05 23:19:12,753 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:19:12,775 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:19:12,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:19:12,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 23:19:12,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:19:13,444 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:19:13,445 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1891525383] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:19:13,445 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:19:13,445 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 34 [2021-06-05 23:19:13,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677641740] [2021-06-05 23:19:13,445 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 23:19:13,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:19:13,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 23:19:13,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=234, Invalid=956, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 23:19:13,445 INFO L87 Difference]: Start difference. First operand 9829 states and 32979 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:19:15,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:19:15,633 INFO L93 Difference]: Finished difference Result 15232 states and 49054 transitions. [2021-06-05 23:19:15,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-05 23:19:15,633 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 23:19:15,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:19:15,655 INFO L225 Difference]: With dead ends: 15232 [2021-06-05 23:19:15,655 INFO L226 Difference]: Without dead ends: 15054 [2021-06-05 23:19:15,656 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1550 ImplicationChecksByTransitivity, 2262.7ms TimeCoverageRelationStatistics Valid=993, Invalid=4119, Unknown=0, NotChecked=0, Total=5112 [2021-06-05 23:19:15,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15054 states. [2021-06-05 23:19:15,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15054 to 9895. [2021-06-05 23:19:15,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9895 states, 9894 states have (on average 3.355771174449161) internal successors, (33202), 9894 states have internal predecessors, (33202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:19:15,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9895 states to 9895 states and 33202 transitions. [2021-06-05 23:19:15,831 INFO L78 Accepts]: Start accepts. Automaton has 9895 states and 33202 transitions. Word has length 36 [2021-06-05 23:19:15,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:19:15,832 INFO L482 AbstractCegarLoop]: Abstraction has 9895 states and 33202 transitions. [2021-06-05 23:19:15,832 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:19:15,832 INFO L276 IsEmpty]: Start isEmpty. Operand 9895 states and 33202 transitions. [2021-06-05 23:19:15,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 23:19:15,843 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:19:15,843 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:19:16,043 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable711,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:19:16,043 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:19:16,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:19:16,044 INFO L82 PathProgramCache]: Analyzing trace with hash -586316687, now seen corresponding path program 87 times [2021-06-05 23:19:16,044 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:19:16,044 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407844849] [2021-06-05 23:19:16,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:19:16,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:19:16,359 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:19:16,359 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:19:16,359 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407844849] [2021-06-05 23:19:16,359 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407844849] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:19:16,359 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1511706037] [2021-06-05 23:19:16,359 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:19:16,382 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 23:19:16,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:19:16,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 23:19:16,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:19:17,048 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:19:17,049 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1511706037] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:19:17,049 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:19:17,049 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 33 [2021-06-05 23:19:17,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158304440] [2021-06-05 23:19:17,049 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 23:19:17,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:19:17,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 23:19:17,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=941, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 23:19:17,049 INFO L87 Difference]: Start difference. First operand 9895 states and 33202 transitions. Second operand has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:19:18,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:19:18,308 INFO L93 Difference]: Finished difference Result 11244 states and 37234 transitions. [2021-06-05 23:19:18,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 23:19:18,308 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 23:19:18,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:19:18,325 INFO L225 Difference]: With dead ends: 11244 [2021-06-05 23:19:18,325 INFO L226 Difference]: Without dead ends: 11124 [2021-06-05 23:19:18,326 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 559 ImplicationChecksByTransitivity, 1431.7ms TimeCoverageRelationStatistics Valid=419, Invalid=2031, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 23:19:18,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11124 states. [2021-06-05 23:19:18,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11124 to 9889. [2021-06-05 23:19:18,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9889 states, 9888 states have (on average 3.3549757281553396) internal successors, (33174), 9888 states have internal predecessors, (33174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:19:18,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9889 states to 9889 states and 33174 transitions. [2021-06-05 23:19:18,473 INFO L78 Accepts]: Start accepts. Automaton has 9889 states and 33174 transitions. Word has length 36 [2021-06-05 23:19:18,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:19:18,473 INFO L482 AbstractCegarLoop]: Abstraction has 9889 states and 33174 transitions. [2021-06-05 23:19:18,473 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:19:18,473 INFO L276 IsEmpty]: Start isEmpty. Operand 9889 states and 33174 transitions. [2021-06-05 23:19:18,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 23:19:18,484 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:19:18,484 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:19:18,684 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable720 [2021-06-05 23:19:18,684 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:19:18,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:19:18,685 INFO L82 PathProgramCache]: Analyzing trace with hash 1839151365, now seen corresponding path program 88 times [2021-06-05 23:19:18,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:19:18,685 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546621362] [2021-06-05 23:19:18,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:19:18,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:19:18,993 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:19:18,993 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:19:18,994 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546621362] [2021-06-05 23:19:18,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546621362] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:19:18,994 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536531352] [2021-06-05 23:19:18,994 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:19:19,016 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:19:19,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:19:19,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 23:19:19,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:19:19,687 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:19:19,687 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1536531352] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:19:19,687 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:19:19,687 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2021-06-05 23:19:19,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854139824] [2021-06-05 23:19:19,687 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 23:19:19,687 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:19:19,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 23:19:19,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=1134, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 23:19:19,688 INFO L87 Difference]: Start difference. First operand 9889 states and 33174 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:19:21,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:19:21,275 INFO L93 Difference]: Finished difference Result 12166 states and 39930 transitions. [2021-06-05 23:19:21,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 23:19:21,275 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 23:19:21,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:19:21,292 INFO L225 Difference]: With dead ends: 12166 [2021-06-05 23:19:21,292 INFO L226 Difference]: Without dead ends: 12085 [2021-06-05 23:19:21,292 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 888 ImplicationChecksByTransitivity, 1607.3ms TimeCoverageRelationStatistics Valid=548, Invalid=2874, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 23:19:21,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12085 states. [2021-06-05 23:19:21,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12085 to 10045. [2021-06-05 23:19:21,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10045 states, 10044 states have (on average 3.346674631620868) internal successors, (33614), 10044 states have internal predecessors, (33614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:19:21,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10045 states to 10045 states and 33614 transitions. [2021-06-05 23:19:21,436 INFO L78 Accepts]: Start accepts. Automaton has 10045 states and 33614 transitions. Word has length 36 [2021-06-05 23:19:21,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:19:21,436 INFO L482 AbstractCegarLoop]: Abstraction has 10045 states and 33614 transitions. [2021-06-05 23:19:21,437 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:19:21,437 INFO L276 IsEmpty]: Start isEmpty. Operand 10045 states and 33614 transitions. [2021-06-05 23:19:21,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 23:19:21,447 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:19:21,447 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:19:21,647 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable729,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:19:21,648 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:19:21,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:19:21,648 INFO L82 PathProgramCache]: Analyzing trace with hash 1001224197, now seen corresponding path program 89 times [2021-06-05 23:19:21,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:19:21,648 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212711896] [2021-06-05 23:19:21,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:19:21,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:19:21,877 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:19:21,877 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:19:21,877 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212711896] [2021-06-05 23:19:21,877 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212711896] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:19:21,877 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824703362] [2021-06-05 23:19:21,878 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:19:21,900 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 23:19:21,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:19:21,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 23:19:21,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:19:22,434 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:19:22,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [824703362] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:19:22,434 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:19:22,434 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2021-06-05 23:19:22,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513438149] [2021-06-05 23:19:22,434 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 23:19:22,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:19:22,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 23:19:22,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=1128, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 23:19:22,435 INFO L87 Difference]: Start difference. First operand 10045 states and 33614 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:19:24,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:19:24,044 INFO L93 Difference]: Finished difference Result 11167 states and 36662 transitions. [2021-06-05 23:19:24,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-05 23:19:24,045 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 23:19:24,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:19:24,060 INFO L225 Difference]: With dead ends: 11167 [2021-06-05 23:19:24,060 INFO L226 Difference]: Without dead ends: 10971 [2021-06-05 23:19:24,060 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1136 ImplicationChecksByTransitivity, 1482.6ms TimeCoverageRelationStatistics Valid=619, Invalid=3413, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 23:19:24,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10971 states. [2021-06-05 23:19:24,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10971 to 10005. [2021-06-05 23:19:24,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10005 states, 10004 states have (on average 3.3494602159136346) internal successors, (33508), 10004 states have internal predecessors, (33508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:19:24,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10005 states to 10005 states and 33508 transitions. [2021-06-05 23:19:24,199 INFO L78 Accepts]: Start accepts. Automaton has 10005 states and 33508 transitions. Word has length 36 [2021-06-05 23:19:24,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:19:24,199 INFO L482 AbstractCegarLoop]: Abstraction has 10005 states and 33508 transitions. [2021-06-05 23:19:24,199 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:19:24,199 INFO L276 IsEmpty]: Start isEmpty. Operand 10005 states and 33508 transitions. [2021-06-05 23:19:24,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 23:19:24,209 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:19:24,209 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:19:24,410 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable736,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:19:24,410 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:19:24,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:19:24,410 INFO L82 PathProgramCache]: Analyzing trace with hash 1517230849, now seen corresponding path program 90 times [2021-06-05 23:19:24,410 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:19:24,410 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052644231] [2021-06-05 23:19:24,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:19:24,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:19:24,716 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:19:24,716 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:19:24,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052644231] [2021-06-05 23:19:24,717 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052644231] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:19:24,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [378609079] [2021-06-05 23:19:24,717 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:19:24,740 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 23:19:24,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:19:24,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 23:19:24,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:19:25,322 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:19:25,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [378609079] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:19:25,323 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:19:25,323 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 34 [2021-06-05 23:19:25,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721397105] [2021-06-05 23:19:25,323 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 23:19:25,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:19:25,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 23:19:25,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=1010, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 23:19:25,323 INFO L87 Difference]: Start difference. First operand 10005 states and 33508 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:19:27,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:19:27,502 INFO L93 Difference]: Finished difference Result 13055 states and 42752 transitions. [2021-06-05 23:19:27,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-05 23:19:27,502 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 23:19:27,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:19:27,521 INFO L225 Difference]: With dead ends: 13055 [2021-06-05 23:19:27,521 INFO L226 Difference]: Without dead ends: 12935 [2021-06-05 23:19:27,521 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1052 ImplicationChecksByTransitivity, 1945.3ms TimeCoverageRelationStatistics Valid=651, Invalid=3509, Unknown=0, NotChecked=0, Total=4160 [2021-06-05 23:19:27,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12935 states. [2021-06-05 23:19:27,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12935 to 10115. [2021-06-05 23:19:27,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10115 states, 10114 states have (on average 3.3494166501878584) internal successors, (33876), 10114 states have internal predecessors, (33876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:19:27,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10115 states to 10115 states and 33876 transitions. [2021-06-05 23:19:27,677 INFO L78 Accepts]: Start accepts. Automaton has 10115 states and 33876 transitions. Word has length 36 [2021-06-05 23:19:27,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:19:27,677 INFO L482 AbstractCegarLoop]: Abstraction has 10115 states and 33876 transitions. [2021-06-05 23:19:27,677 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:19:27,677 INFO L276 IsEmpty]: Start isEmpty. Operand 10115 states and 33876 transitions. [2021-06-05 23:19:27,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 23:19:27,688 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:19:27,688 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:19:27,895 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable740,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:19:27,895 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:19:27,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:19:27,896 INFO L82 PathProgramCache]: Analyzing trace with hash 679303681, now seen corresponding path program 91 times [2021-06-05 23:19:27,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:19:27,896 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672974338] [2021-06-05 23:19:27,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:19:27,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:19:28,122 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:19:28,122 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:19:28,122 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672974338] [2021-06-05 23:19:28,123 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672974338] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:19:28,123 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [373512802] [2021-06-05 23:19:28,123 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:19:28,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:19:28,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 23:19:28,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:19:28,694 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:19:28,694 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [373512802] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:19:28,694 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:19:28,694 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2021-06-05 23:19:28,694 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291186247] [2021-06-05 23:19:28,694 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 23:19:28,694 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:19:28,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 23:19:28,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=1126, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 23:19:28,695 INFO L87 Difference]: Start difference. First operand 10115 states and 33876 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:19:30,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:19:30,316 INFO L93 Difference]: Finished difference Result 11431 states and 37513 transitions. [2021-06-05 23:19:30,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-05 23:19:30,317 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 23:19:30,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:19:30,332 INFO L225 Difference]: With dead ends: 11431 [2021-06-05 23:19:30,332 INFO L226 Difference]: Without dead ends: 11251 [2021-06-05 23:19:30,333 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1220 ImplicationChecksByTransitivity, 1628.9ms TimeCoverageRelationStatistics Valid=685, Invalid=3737, Unknown=0, NotChecked=0, Total=4422 [2021-06-05 23:19:30,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11251 states. [2021-06-05 23:19:30,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11251 to 10071. [2021-06-05 23:19:30,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10071 states, 10070 states have (on average 3.3531281032770606) internal successors, (33766), 10070 states have internal predecessors, (33766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:19:30,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10071 states to 10071 states and 33766 transitions. [2021-06-05 23:19:30,475 INFO L78 Accepts]: Start accepts. Automaton has 10071 states and 33766 transitions. Word has length 36 [2021-06-05 23:19:30,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:19:30,475 INFO L482 AbstractCegarLoop]: Abstraction has 10071 states and 33766 transitions. [2021-06-05 23:19:30,476 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:19:30,476 INFO L276 IsEmpty]: Start isEmpty. Operand 10071 states and 33766 transitions. [2021-06-05 23:19:30,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 23:19:30,486 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:19:30,486 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:19:30,686 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable750 [2021-06-05 23:19:30,687 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:19:30,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:19:30,687 INFO L82 PathProgramCache]: Analyzing trace with hash 1418725637, now seen corresponding path program 92 times [2021-06-05 23:19:30,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:19:30,687 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187947566] [2021-06-05 23:19:30,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:19:30,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:19:30,924 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:19:30,925 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:19:30,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187947566] [2021-06-05 23:19:30,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187947566] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:19:30,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85291531] [2021-06-05 23:19:30,925 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:19:30,946 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:19:30,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:19:30,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 23:19:30,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:19:31,461 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:19:31,462 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [85291531] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:19:31,462 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:19:31,462 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 36 [2021-06-05 23:19:31,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837460597] [2021-06-05 23:19:31,462 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 23:19:31,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:19:31,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 23:19:31,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=1116, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 23:19:31,462 INFO L87 Difference]: Start difference. First operand 10071 states and 33766 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:19:34,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:19:34,733 INFO L93 Difference]: Finished difference Result 15223 states and 49001 transitions. [2021-06-05 23:19:34,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-06-05 23:19:34,733 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 23:19:34,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:19:34,754 INFO L225 Difference]: With dead ends: 15223 [2021-06-05 23:19:34,754 INFO L226 Difference]: Without dead ends: 14956 [2021-06-05 23:19:34,754 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2441 ImplicationChecksByTransitivity, 2519.0ms TimeCoverageRelationStatistics Valid=1072, Invalid=6760, Unknown=0, NotChecked=0, Total=7832 [2021-06-05 23:19:34,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14956 states. [2021-06-05 23:19:34,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14956 to 10150. [2021-06-05 23:19:34,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10150 states, 10149 states have (on average 3.3555030052221895) internal successors, (34055), 10149 states have internal predecessors, (34055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:19:34,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10150 states to 10150 states and 34055 transitions. [2021-06-05 23:19:34,925 INFO L78 Accepts]: Start accepts. Automaton has 10150 states and 34055 transitions. Word has length 36 [2021-06-05 23:19:34,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:19:34,925 INFO L482 AbstractCegarLoop]: Abstraction has 10150 states and 34055 transitions. [2021-06-05 23:19:34,925 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:19:34,925 INFO L276 IsEmpty]: Start isEmpty. Operand 10150 states and 34055 transitions. [2021-06-05 23:19:34,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 23:19:34,936 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:19:34,936 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:19:35,136 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable754 [2021-06-05 23:19:35,137 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:19:35,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:19:35,137 INFO L82 PathProgramCache]: Analyzing trace with hash 308556037, now seen corresponding path program 93 times [2021-06-05 23:19:35,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:19:35,137 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603717662] [2021-06-05 23:19:35,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:19:35,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:19:35,388 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:19:35,388 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:19:35,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603717662] [2021-06-05 23:19:35,389 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1603717662] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:19:35,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1994460299] [2021-06-05 23:19:35,389 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:19:35,413 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 23:19:35,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:19:35,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 23:19:35,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:19:35,966 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:19:35,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1994460299] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:19:35,967 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:19:35,967 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 36 [2021-06-05 23:19:35,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941179754] [2021-06-05 23:19:35,967 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 23:19:35,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:19:35,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 23:19:35,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=1087, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 23:19:35,967 INFO L87 Difference]: Start difference. First operand 10150 states and 34055 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:19:40,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:19:40,653 INFO L93 Difference]: Finished difference Result 17668 states and 56234 transitions. [2021-06-05 23:19:40,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2021-06-05 23:19:40,653 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 23:19:40,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:19:40,676 INFO L225 Difference]: With dead ends: 17668 [2021-06-05 23:19:40,676 INFO L226 Difference]: Without dead ends: 17485 [2021-06-05 23:19:40,677 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3821 ImplicationChecksByTransitivity, 3584.8ms TimeCoverageRelationStatistics Valid=1786, Invalid=9770, Unknown=0, NotChecked=0, Total=11556 [2021-06-05 23:19:40,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17485 states. [2021-06-05 23:19:40,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17485 to 10150. [2021-06-05 23:19:40,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10150 states, 10149 states have (on average 3.3555030052221895) internal successors, (34055), 10149 states have internal predecessors, (34055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:19:40,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10150 states to 10150 states and 34055 transitions. [2021-06-05 23:19:40,870 INFO L78 Accepts]: Start accepts. Automaton has 10150 states and 34055 transitions. Word has length 36 [2021-06-05 23:19:40,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:19:40,870 INFO L482 AbstractCegarLoop]: Abstraction has 10150 states and 34055 transitions. [2021-06-05 23:19:40,870 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:19:40,870 INFO L276 IsEmpty]: Start isEmpty. Operand 10150 states and 34055 transitions. [2021-06-05 23:19:40,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 23:19:40,881 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:19:40,881 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:19:41,081 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable758,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:19:41,081 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:19:41,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:19:41,082 INFO L82 PathProgramCache]: Analyzing trace with hash -8773971, now seen corresponding path program 94 times [2021-06-05 23:19:41,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:19:41,082 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716384449] [2021-06-05 23:19:41,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:19:41,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:19:41,386 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:19:41,386 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:19:41,386 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716384449] [2021-06-05 23:19:41,386 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716384449] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:19:41,386 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1447693116] [2021-06-05 23:19:41,386 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:19:41,408 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:19:41,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:19:41,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 23:19:41,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:19:42,036 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:19:42,036 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1447693116] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:19:42,036 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:19:42,036 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2021-06-05 23:19:42,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308503693] [2021-06-05 23:19:42,037 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 23:19:42,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:19:42,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 23:19:42,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=1136, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 23:19:42,037 INFO L87 Difference]: Start difference. First operand 10150 states and 34055 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:19:43,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:19:43,765 INFO L93 Difference]: Finished difference Result 12773 states and 41981 transitions. [2021-06-05 23:19:43,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 23:19:43,765 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 23:19:43,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:19:43,784 INFO L225 Difference]: With dead ends: 12773 [2021-06-05 23:19:43,784 INFO L226 Difference]: Without dead ends: 12692 [2021-06-05 23:19:43,785 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 975 ImplicationChecksByTransitivity, 1735.3ms TimeCoverageRelationStatistics Valid=597, Invalid=3185, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 23:19:43,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12692 states. [2021-06-05 23:19:43,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12692 to 10326. [2021-06-05 23:19:43,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10326 states, 10325 states have (on average 3.3506053268765132) internal successors, (34595), 10325 states have internal predecessors, (34595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:19:43,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10326 states to 10326 states and 34595 transitions. [2021-06-05 23:19:43,945 INFO L78 Accepts]: Start accepts. Automaton has 10326 states and 34595 transitions. Word has length 36 [2021-06-05 23:19:43,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:19:43,945 INFO L482 AbstractCegarLoop]: Abstraction has 10326 states and 34595 transitions. [2021-06-05 23:19:43,945 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:19:43,945 INFO L276 IsEmpty]: Start isEmpty. Operand 10326 states and 34595 transitions. [2021-06-05 23:19:43,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 23:19:43,956 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:19:43,956 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:19:44,156 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable762 [2021-06-05 23:19:44,157 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:19:44,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:19:44,157 INFO L82 PathProgramCache]: Analyzing trace with hash -846701139, now seen corresponding path program 95 times [2021-06-05 23:19:44,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:19:44,157 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978691953] [2021-06-05 23:19:44,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:19:44,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:19:44,384 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:19:44,385 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:19:44,385 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978691953] [2021-06-05 23:19:44,385 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [978691953] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:19:44,385 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885513435] [2021-06-05 23:19:44,385 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:19:44,411 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 23:19:44,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:19:44,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 23:19:44,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:19:44,954 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:19:44,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [885513435] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:19:44,955 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:19:44,955 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2021-06-05 23:19:44,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612305584] [2021-06-05 23:19:44,955 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 23:19:44,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:19:44,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 23:19:44,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=1130, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 23:19:44,955 INFO L87 Difference]: Start difference. First operand 10326 states and 34595 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:19:46,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:19:46,980 INFO L93 Difference]: Finished difference Result 11312 states and 37251 transitions. [2021-06-05 23:19:46,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-05 23:19:46,980 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 23:19:46,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:19:46,995 INFO L225 Difference]: With dead ends: 11312 [2021-06-05 23:19:46,995 INFO L226 Difference]: Without dead ends: 11132 [2021-06-05 23:19:46,995 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1408 ImplicationChecksByTransitivity, 1909.7ms TimeCoverageRelationStatistics Valid=784, Invalid=4328, Unknown=0, NotChecked=0, Total=5112 [2021-06-05 23:19:47,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11132 states. [2021-06-05 23:19:47,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11132 to 10274. [2021-06-05 23:19:47,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10274 states, 10273 states have (on average 3.3549109315681886) internal successors, (34465), 10273 states have internal predecessors, (34465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:19:47,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10274 states to 10274 states and 34465 transitions. [2021-06-05 23:19:47,139 INFO L78 Accepts]: Start accepts. Automaton has 10274 states and 34465 transitions. Word has length 36 [2021-06-05 23:19:47,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:19:47,139 INFO L482 AbstractCegarLoop]: Abstraction has 10274 states and 34465 transitions. [2021-06-05 23:19:47,139 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:19:47,139 INFO L276 IsEmpty]: Start isEmpty. Operand 10274 states and 34465 transitions. [2021-06-05 23:19:47,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 23:19:47,150 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:19:47,150 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:19:47,350 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable772 [2021-06-05 23:19:47,350 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:19:47,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:19:47,350 INFO L82 PathProgramCache]: Analyzing trace with hash -1524762959, now seen corresponding path program 96 times [2021-06-05 23:19:47,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:19:47,351 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283203021] [2021-06-05 23:19:47,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:19:47,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:19:47,667 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:19:47,667 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:19:47,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283203021] [2021-06-05 23:19:47,667 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283203021] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:19:47,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621020226] [2021-06-05 23:19:47,667 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:19:47,690 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 23:19:47,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:19:47,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 23:19:47,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:19:48,251 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:19:48,252 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [621020226] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:19:48,252 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:19:48,252 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 34 [2021-06-05 23:19:48,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469001960] [2021-06-05 23:19:48,252 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 23:19:48,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:19:48,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 23:19:48,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=985, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 23:19:48,253 INFO L87 Difference]: Start difference. First operand 10274 states and 34465 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:19:51,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:19:51,425 INFO L93 Difference]: Finished difference Result 16412 states and 53200 transitions. [2021-06-05 23:19:51,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-06-05 23:19:51,425 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 23:19:51,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:19:51,450 INFO L225 Difference]: With dead ends: 16412 [2021-06-05 23:19:51,450 INFO L226 Difference]: Without dead ends: 16286 [2021-06-05 23:19:51,451 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1871 ImplicationChecksByTransitivity, 2666.4ms TimeCoverageRelationStatistics Valid=989, Invalid=5017, Unknown=0, NotChecked=0, Total=6006 [2021-06-05 23:19:51,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16286 states. [2021-06-05 23:19:51,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16286 to 10284. [2021-06-05 23:19:51,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10284 states, 10283 states have (on average 3.355927258582126) internal successors, (34509), 10283 states have internal predecessors, (34509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:19:51,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10284 states to 10284 states and 34509 transitions. [2021-06-05 23:19:51,630 INFO L78 Accepts]: Start accepts. Automaton has 10284 states and 34509 transitions. Word has length 36 [2021-06-05 23:19:51,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:19:51,631 INFO L482 AbstractCegarLoop]: Abstraction has 10284 states and 34509 transitions. [2021-06-05 23:19:51,631 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:19:51,631 INFO L276 IsEmpty]: Start isEmpty. Operand 10284 states and 34509 transitions. [2021-06-05 23:19:51,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 23:19:51,642 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:19:51,642 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:19:51,842 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable776,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:19:51,843 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:19:51,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:19:51,843 INFO L82 PathProgramCache]: Analyzing trace with hash -107279183, now seen corresponding path program 97 times [2021-06-05 23:19:51,843 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:19:51,843 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82521014] [2021-06-05 23:19:51,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:19:51,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:19:52,135 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:19:52,135 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:19:52,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82521014] [2021-06-05 23:19:52,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82521014] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:19:52,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [759880884] [2021-06-05 23:19:52,136 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:19:52,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:19:52,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 23:19:52,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:19:52,700 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:19:52,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [759880884] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:19:52,700 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:19:52,700 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 37 [2021-06-05 23:19:52,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037278851] [2021-06-05 23:19:52,701 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 23:19:52,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:19:52,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 23:19:52,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=1179, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 23:19:52,701 INFO L87 Difference]: Start difference. First operand 10284 states and 34509 transitions. Second operand has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:19:54,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:19:54,747 INFO L93 Difference]: Finished difference Result 14911 states and 48094 transitions. [2021-06-05 23:19:54,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-05 23:19:54,747 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 23:19:54,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:19:54,769 INFO L225 Difference]: With dead ends: 14911 [2021-06-05 23:19:54,769 INFO L226 Difference]: Without dead ends: 14687 [2021-06-05 23:19:54,770 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1739 ImplicationChecksByTransitivity, 1888.8ms TimeCoverageRelationStatistics Valid=960, Invalid=4892, Unknown=0, NotChecked=0, Total=5852 [2021-06-05 23:19:54,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14687 states. [2021-06-05 23:19:54,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14687 to 10248. [2021-06-05 23:19:54,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10248 states, 10247 states have (on average 3.3530789499365667) internal successors, (34359), 10247 states have internal predecessors, (34359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:19:54,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10248 states to 10248 states and 34359 transitions. [2021-06-05 23:19:54,984 INFO L78 Accepts]: Start accepts. Automaton has 10248 states and 34359 transitions. Word has length 36 [2021-06-05 23:19:54,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:19:54,984 INFO L482 AbstractCegarLoop]: Abstraction has 10248 states and 34359 transitions. [2021-06-05 23:19:54,984 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:19:54,985 INFO L276 IsEmpty]: Start isEmpty. Operand 10248 states and 34359 transitions. [2021-06-05 23:19:54,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 23:19:54,995 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:19:54,996 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:19:55,196 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable786 [2021-06-05 23:19:55,196 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:19:55,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:19:55,197 INFO L82 PathProgramCache]: Analyzing trace with hash 681080241, now seen corresponding path program 98 times [2021-06-05 23:19:55,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:19:55,197 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848269621] [2021-06-05 23:19:55,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:19:55,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:19:55,442 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:19:55,442 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:19:55,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848269621] [2021-06-05 23:19:55,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848269621] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:19:55,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1668881036] [2021-06-05 23:19:55,442 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:19:55,464 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:19:55,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:19:55,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 23:19:55,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:19:55,962 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:19:55,962 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1668881036] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:19:55,962 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:19:55,962 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 36 [2021-06-05 23:19:55,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091936015] [2021-06-05 23:19:55,963 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 23:19:55,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:19:55,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 23:19:55,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=251, Invalid=1081, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 23:19:55,963 INFO L87 Difference]: Start difference. First operand 10248 states and 34359 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:19:59,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:19:59,280 INFO L93 Difference]: Finished difference Result 16978 states and 54134 transitions. [2021-06-05 23:19:59,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-06-05 23:19:59,280 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 23:19:59,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:19:59,302 INFO L225 Difference]: With dead ends: 16978 [2021-06-05 23:19:59,302 INFO L226 Difference]: Without dead ends: 16795 [2021-06-05 23:19:59,302 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2635 ImplicationChecksByTransitivity, 2647.7ms TimeCoverageRelationStatistics Valid=1375, Invalid=6635, Unknown=0, NotChecked=0, Total=8010 [2021-06-05 23:19:59,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16795 states. [2021-06-05 23:19:59,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16795 to 10223. [2021-06-05 23:19:59,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10223 states, 10222 states have (on average 3.352377225591861) internal successors, (34268), 10222 states have internal predecessors, (34268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:19:59,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10223 states to 10223 states and 34268 transitions. [2021-06-05 23:19:59,487 INFO L78 Accepts]: Start accepts. Automaton has 10223 states and 34268 transitions. Word has length 36 [2021-06-05 23:19:59,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:19:59,487 INFO L482 AbstractCegarLoop]: Abstraction has 10223 states and 34268 transitions. [2021-06-05 23:19:59,487 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:19:59,487 INFO L276 IsEmpty]: Start isEmpty. Operand 10223 states and 34268 transitions. [2021-06-05 23:19:59,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 23:19:59,499 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:19:59,499 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:19:59,699 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable790,98 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:19:59,699 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:19:59,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:19:59,699 INFO L82 PathProgramCache]: Analyzing trace with hash 373150449, now seen corresponding path program 99 times [2021-06-05 23:19:59,699 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:19:59,699 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418527887] [2021-06-05 23:19:59,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:19:59,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:20:00,047 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:20:00,047 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:20:00,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418527887] [2021-06-05 23:20:00,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418527887] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:20:00,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [628118148] [2021-06-05 23:20:00,047 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:20:00,071 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 23:20:00,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:20:00,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 23:20:00,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:20:00,631 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:20:00,632 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [628118148] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:20:00,632 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:20:00,632 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 34 [2021-06-05 23:20:00,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494229317] [2021-06-05 23:20:00,632 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 23:20:00,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:20:00,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 23:20:00,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=973, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 23:20:00,632 INFO L87 Difference]: Start difference. First operand 10223 states and 34268 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:20:03,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:20:03,412 INFO L93 Difference]: Finished difference Result 19701 states and 64010 transitions. [2021-06-05 23:20:03,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-05 23:20:03,412 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 23:20:03,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:20:03,443 INFO L225 Difference]: With dead ends: 19701 [2021-06-05 23:20:03,443 INFO L226 Difference]: Without dead ends: 19569 [2021-06-05 23:20:03,443 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1793 ImplicationChecksByTransitivity, 2713.4ms TimeCoverageRelationStatistics Valid=1149, Invalid=4703, Unknown=0, NotChecked=0, Total=5852 [2021-06-05 23:20:03,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19569 states. [2021-06-05 23:20:03,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19569 to 10248. [2021-06-05 23:20:03,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10248 states, 10247 states have (on average 3.351517517322143) internal successors, (34343), 10247 states have internal predecessors, (34343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:20:03,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10248 states to 10248 states and 34343 transitions. [2021-06-05 23:20:03,653 INFO L78 Accepts]: Start accepts. Automaton has 10248 states and 34343 transitions. Word has length 36 [2021-06-05 23:20:03,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:20:03,653 INFO L482 AbstractCegarLoop]: Abstraction has 10248 states and 34343 transitions. [2021-06-05 23:20:03,653 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:20:03,653 INFO L276 IsEmpty]: Start isEmpty. Operand 10248 states and 34343 transitions. [2021-06-05 23:20:03,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 23:20:03,664 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:20:03,664 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:20:03,865 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable794,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:20:03,865 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:20:03,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:20:03,865 INFO L82 PathProgramCache]: Analyzing trace with hash 1098187889, now seen corresponding path program 100 times [2021-06-05 23:20:03,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:20:03,865 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778074432] [2021-06-05 23:20:03,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:20:03,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:20:04,134 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:20:04,134 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:20:04,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778074432] [2021-06-05 23:20:04,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778074432] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:20:04,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294729480] [2021-06-05 23:20:04,134 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:20:04,157 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:20:04,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:20:04,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 23:20:04,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:20:04,776 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:20:04,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [294729480] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:20:04,776 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:20:04,776 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-06-05 23:20:04,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499898759] [2021-06-05 23:20:04,777 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 23:20:04,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:20:04,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 23:20:04,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=978, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 23:20:04,777 INFO L87 Difference]: Start difference. First operand 10248 states and 34343 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:20:06,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:20:06,212 INFO L93 Difference]: Finished difference Result 13293 states and 43737 transitions. [2021-06-05 23:20:06,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 23:20:06,213 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 23:20:06,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:20:06,232 INFO L225 Difference]: With dead ends: 13293 [2021-06-05 23:20:06,232 INFO L226 Difference]: Without dead ends: 13173 [2021-06-05 23:20:06,233 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 813 ImplicationChecksByTransitivity, 1487.8ms TimeCoverageRelationStatistics Valid=606, Invalid=2364, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 23:20:06,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13173 states. [2021-06-05 23:20:06,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13173 to 10248. [2021-06-05 23:20:06,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10248 states, 10247 states have (on average 3.351517517322143) internal successors, (34343), 10247 states have internal predecessors, (34343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:20:06,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10248 states to 10248 states and 34343 transitions. [2021-06-05 23:20:06,392 INFO L78 Accepts]: Start accepts. Automaton has 10248 states and 34343 transitions. Word has length 36 [2021-06-05 23:20:06,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:20:06,393 INFO L482 AbstractCegarLoop]: Abstraction has 10248 states and 34343 transitions. [2021-06-05 23:20:06,393 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:20:06,393 INFO L276 IsEmpty]: Start isEmpty. Operand 10248 states and 34343 transitions. [2021-06-05 23:20:06,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 23:20:06,404 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:20:06,404 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:20:06,604 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable801 [2021-06-05 23:20:06,604 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:20:06,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:20:06,605 INFO L82 PathProgramCache]: Analyzing trace with hash -474733435, now seen corresponding path program 101 times [2021-06-05 23:20:06,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:20:06,605 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589862011] [2021-06-05 23:20:06,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:20:06,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:20:06,829 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:20:06,829 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:20:06,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589862011] [2021-06-05 23:20:06,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589862011] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:20:06,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1666807225] [2021-06-05 23:20:06,829 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 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:20:06,853 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 23:20:06,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:20:06,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 23:20:06,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:20:07,327 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:20:07,327 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1666807225] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:20:07,327 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:20:07,327 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2021-06-05 23:20:07,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397808087] [2021-06-05 23:20:07,327 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 23:20:07,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:20:07,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 23:20:07,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=1128, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 23:20:07,328 INFO L87 Difference]: Start difference. First operand 10248 states and 34343 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:20:09,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:20:09,426 INFO L93 Difference]: Finished difference Result 12340 states and 40402 transitions. [2021-06-05 23:20:09,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-05 23:20:09,426 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 23:20:09,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:20:09,443 INFO L225 Difference]: With dead ends: 12340 [2021-06-05 23:20:09,443 INFO L226 Difference]: Without dead ends: 12087 [2021-06-05 23:20:09,444 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1286 ImplicationChecksByTransitivity, 1741.4ms TimeCoverageRelationStatistics Valid=802, Invalid=4028, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 23:20:09,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12087 states. [2021-06-05 23:20:09,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12087 to 10443. [2021-06-05 23:20:09,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10443 states, 10442 states have (on average 3.348209155334227) internal successors, (34962), 10442 states have internal predecessors, (34962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:20:09,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10443 states to 10443 states and 34962 transitions. [2021-06-05 23:20:09,605 INFO L78 Accepts]: Start accepts. Automaton has 10443 states and 34962 transitions. Word has length 36 [2021-06-05 23:20:09,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:20:09,605 INFO L482 AbstractCegarLoop]: Abstraction has 10443 states and 34962 transitions. [2021-06-05 23:20:09,605 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:20:09,605 INFO L276 IsEmpty]: Start isEmpty. Operand 10443 states and 34962 transitions. [2021-06-05 23:20:09,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 23:20:09,617 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:20:09,617 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:20:09,818 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable808,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:20:09,818 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:20:09,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:20:09,818 INFO L82 PathProgramCache]: Analyzing trace with hash 313625989, now seen corresponding path program 102 times [2021-06-05 23:20:09,818 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:20:09,818 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050417586] [2021-06-05 23:20:09,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:20:09,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:20:10,041 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:20:10,041 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:20:10,041 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050417586] [2021-06-05 23:20:10,041 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050417586] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:20:10,041 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1940160278] [2021-06-05 23:20:10,041 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:20:10,065 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 23:20:10,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:20:10,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 23:20:10,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:20:10,540 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:20:10,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1940160278] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:20:10,541 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:20:10,541 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 35 [2021-06-05 23:20:10,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652214043] [2021-06-05 23:20:10,541 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 23:20:10,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:20:10,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 23:20:10,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=234, Invalid=1026, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 23:20:10,541 INFO L87 Difference]: Start difference. First operand 10443 states and 34962 transitions. Second operand has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:20:13,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:20:13,175 INFO L93 Difference]: Finished difference Result 15152 states and 48858 transitions. [2021-06-05 23:20:13,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-06-05 23:20:13,175 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 23:20:13,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:20:13,197 INFO L225 Difference]: With dead ends: 15152 [2021-06-05 23:20:13,197 INFO L226 Difference]: Without dead ends: 14954 [2021-06-05 23:20:13,197 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1913 ImplicationChecksByTransitivity, 2237.8ms TimeCoverageRelationStatistics Valid=1076, Invalid=5244, Unknown=0, NotChecked=0, Total=6320 [2021-06-05 23:20:13,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14954 states. [2021-06-05 23:20:13,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14954 to 10436. [2021-06-05 23:20:13,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10436 states, 10435 states have (on average 3.3470052707235265) internal successors, (34926), 10435 states have internal predecessors, (34926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:20:13,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10436 states to 10436 states and 34926 transitions. [2021-06-05 23:20:13,377 INFO L78 Accepts]: Start accepts. Automaton has 10436 states and 34926 transitions. Word has length 36 [2021-06-05 23:20:13,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:20:13,377 INFO L482 AbstractCegarLoop]: Abstraction has 10436 states and 34926 transitions. [2021-06-05 23:20:13,378 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:20:13,378 INFO L276 IsEmpty]: Start isEmpty. Operand 10436 states and 34926 transitions. [2021-06-05 23:20:13,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 23:20:13,389 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:20:13,389 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:20:13,590 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable810 [2021-06-05 23:20:13,590 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:20:13,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:20:13,590 INFO L82 PathProgramCache]: Analyzing trace with hash -1715907027, now seen corresponding path program 103 times [2021-06-05 23:20:13,590 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:20:13,590 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134324886] [2021-06-05 23:20:13,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:20:13,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:20:13,827 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:20:13,827 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:20:13,827 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134324886] [2021-06-05 23:20:13,827 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134324886] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:20:13,827 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [955071091] [2021-06-05 23:20:13,827 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:20:13,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:20:13,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 23:20:13,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:20:14,408 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:20:14,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [955071091] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:20:14,409 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:20:14,409 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2021-06-05 23:20:14,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45453630] [2021-06-05 23:20:14,409 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 23:20:14,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:20:14,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 23:20:14,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=242, Invalid=1090, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 23:20:14,409 INFO L87 Difference]: Start difference. First operand 10436 states and 34926 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:20:17,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:20:17,028 INFO L93 Difference]: Finished difference Result 15709 states and 50648 transitions. [2021-06-05 23:20:17,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-06-05 23:20:17,028 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 23:20:17,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:20:17,051 INFO L225 Difference]: With dead ends: 15709 [2021-06-05 23:20:17,051 INFO L226 Difference]: Without dead ends: 15507 [2021-06-05 23:20:17,052 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1879 ImplicationChecksByTransitivity, 2282.3ms TimeCoverageRelationStatistics Valid=1127, Invalid=5035, Unknown=0, NotChecked=0, Total=6162 [2021-06-05 23:20:17,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15507 states. [2021-06-05 23:20:17,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15507 to 10431. [2021-06-05 23:20:17,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10431 states, 10430 states have (on average 3.3465004793863855) internal successors, (34904), 10430 states have internal predecessors, (34904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:20:17,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10431 states to 10431 states and 34904 transitions. [2021-06-05 23:20:17,299 INFO L78 Accepts]: Start accepts. Automaton has 10431 states and 34904 transitions. Word has length 36 [2021-06-05 23:20:17,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:20:17,300 INFO L482 AbstractCegarLoop]: Abstraction has 10431 states and 34904 transitions. [2021-06-05 23:20:17,300 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:20:17,300 INFO L276 IsEmpty]: Start isEmpty. Operand 10431 states and 34904 transitions. [2021-06-05 23:20:17,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 23:20:17,311 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:20:17,311 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:20:17,512 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable814,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:20:17,512 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:20:17,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:20:17,512 INFO L82 PathProgramCache]: Analyzing trace with hash 1183400649, now seen corresponding path program 104 times [2021-06-05 23:20:17,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:20:17,512 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71375416] [2021-06-05 23:20:17,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:20:17,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:20:17,773 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:20:17,773 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:20:17,773 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71375416] [2021-06-05 23:20:17,773 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71375416] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:20:17,773 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687646055] [2021-06-05 23:20:17,773 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:20:17,796 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:20:17,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:20:17,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 23:20:17,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:20:18,266 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:20:18,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1687646055] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:20:18,267 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:20:18,267 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 33 [2021-06-05 23:20:18,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769778832] [2021-06-05 23:20:18,267 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 23:20:18,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:20:18,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 23:20:18,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=953, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 23:20:18,267 INFO L87 Difference]: Start difference. First operand 10431 states and 34904 transitions. Second operand has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:20:19,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:20:19,763 INFO L93 Difference]: Finished difference Result 11925 states and 39225 transitions. [2021-06-05 23:20:19,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 23:20:19,763 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 23:20:19,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:20:19,780 INFO L225 Difference]: With dead ends: 11925 [2021-06-05 23:20:19,780 INFO L226 Difference]: Without dead ends: 11732 [2021-06-05 23:20:19,780 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 690 ImplicationChecksByTransitivity, 1315.4ms TimeCoverageRelationStatistics Valid=455, Invalid=2515, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 23:20:19,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11732 states. [2021-06-05 23:20:19,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11732 to 10442. [2021-06-05 23:20:19,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10442 states, 10441 states have (on average 3.3473805191073653) internal successors, (34950), 10441 states have internal predecessors, (34950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:20:19,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10442 states to 10442 states and 34950 transitions. [2021-06-05 23:20:19,937 INFO L78 Accepts]: Start accepts. Automaton has 10442 states and 34950 transitions. Word has length 36 [2021-06-05 23:20:19,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:20:19,937 INFO L482 AbstractCegarLoop]: Abstraction has 10442 states and 34950 transitions. [2021-06-05 23:20:19,937 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:20:19,937 INFO L276 IsEmpty]: Start isEmpty. Operand 10442 states and 34950 transitions. [2021-06-05 23:20:19,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 23:20:19,948 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:20:19,949 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:20:20,149 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable818,104 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:20:20,149 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:20:20,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:20:20,149 INFO L82 PathProgramCache]: Analyzing trace with hash 2135673005, now seen corresponding path program 105 times [2021-06-05 23:20:20,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:20:20,149 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016209931] [2021-06-05 23:20:20,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:20:20,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:20:20,362 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:20:20,362 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:20:20,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016209931] [2021-06-05 23:20:20,362 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016209931] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:20:20,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1825461532] [2021-06-05 23:20:20,362 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 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:20:20,386 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 23:20:20,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:20:20,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 23:20:20,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:20:20,918 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:20:20,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1825461532] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:20:20,918 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:20:20,918 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 33 [2021-06-05 23:20:20,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884627515] [2021-06-05 23:20:20,918 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 23:20:20,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:20:20,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 23:20:20,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=928, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 23:20:20,919 INFO L87 Difference]: Start difference. First operand 10442 states and 34950 transitions. Second operand has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:20:22,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:20:22,321 INFO L93 Difference]: Finished difference Result 17441 states and 57200 transitions. [2021-06-05 23:20:22,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 23:20:22,321 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 23:20:22,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:20:22,347 INFO L225 Difference]: With dead ends: 17441 [2021-06-05 23:20:22,348 INFO L226 Difference]: Without dead ends: 17361 [2021-06-05 23:20:22,348 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 598 ImplicationChecksByTransitivity, 1181.2ms TimeCoverageRelationStatistics Valid=543, Invalid=2213, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 23:20:22,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17361 states. [2021-06-05 23:20:22,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17361 to 10505. [2021-06-05 23:20:22,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10505 states, 10504 states have (on average 3.3493907083015992) internal successors, (35182), 10504 states have internal predecessors, (35182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:20:22,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10505 states to 10505 states and 35182 transitions. [2021-06-05 23:20:22,558 INFO L78 Accepts]: Start accepts. Automaton has 10505 states and 35182 transitions. Word has length 36 [2021-06-05 23:20:22,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:20:22,558 INFO L482 AbstractCegarLoop]: Abstraction has 10505 states and 35182 transitions. [2021-06-05 23:20:22,558 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:20:22,558 INFO L276 IsEmpty]: Start isEmpty. Operand 10505 states and 35182 transitions. [2021-06-05 23:20:22,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 23:20:22,570 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:20:22,570 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:20:22,770 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable823 [2021-06-05 23:20:22,771 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:20:22,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:20:22,771 INFO L82 PathProgramCache]: Analyzing trace with hash 1748517121, now seen corresponding path program 106 times [2021-06-05 23:20:22,771 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:20:22,771 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899049445] [2021-06-05 23:20:22,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:20:22,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:20:22,990 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:20:22,990 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:20:22,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899049445] [2021-06-05 23:20:22,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899049445] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:20:22,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [808009316] [2021-06-05 23:20:22,990 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:20:23,013 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:20:23,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:20:23,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 23:20:23,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:20:23,611 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:20:23,612 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [808009316] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:20:23,612 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:20:23,612 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-06-05 23:20:23,612 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023159552] [2021-06-05 23:20:23,612 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 23:20:23,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:20:23,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 23:20:23,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=1004, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 23:20:23,612 INFO L87 Difference]: Start difference. First operand 10505 states and 35182 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:20:25,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:20:25,423 INFO L93 Difference]: Finished difference Result 16337 states and 53642 transitions. [2021-06-05 23:20:25,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 23:20:25,423 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 23:20:25,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:20:25,451 INFO L225 Difference]: With dead ends: 16337 [2021-06-05 23:20:25,451 INFO L226 Difference]: Without dead ends: 16257 [2021-06-05 23:20:25,451 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 831 ImplicationChecksByTransitivity, 1580.1ms TimeCoverageRelationStatistics Valid=680, Invalid=2980, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 23:20:25,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16257 states. [2021-06-05 23:20:25,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16257 to 10503. [2021-06-05 23:20:25,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10503 states, 10502 states have (on average 3.3494572462388117) internal successors, (35176), 10502 states have internal predecessors, (35176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:20:25,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10503 states to 10503 states and 35176 transitions. [2021-06-05 23:20:25,645 INFO L78 Accepts]: Start accepts. Automaton has 10503 states and 35176 transitions. Word has length 36 [2021-06-05 23:20:25,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:20:25,646 INFO L482 AbstractCegarLoop]: Abstraction has 10503 states and 35176 transitions. [2021-06-05 23:20:25,646 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:20:25,646 INFO L276 IsEmpty]: Start isEmpty. Operand 10503 states and 35176 transitions. [2021-06-05 23:20:25,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 23:20:25,657 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:20:25,657 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:20:25,859 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable837,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:20:25,859 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:20:25,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:20:25,859 INFO L82 PathProgramCache]: Analyzing trace with hash 348934589, now seen corresponding path program 107 times [2021-06-05 23:20:25,859 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:20:25,860 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114505783] [2021-06-05 23:20:25,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:20:25,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:20:26,186 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:20:26,186 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:20:26,186 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114505783] [2021-06-05 23:20:26,186 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [114505783] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:20:26,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1463018724] [2021-06-05 23:20:26,187 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:20:26,211 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 23:20:26,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:20:26,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 23:20:26,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:20:26,826 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:20:26,827 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1463018724] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:20:26,827 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:20:26,827 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 35 [2021-06-05 23:20:26,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563050096] [2021-06-05 23:20:26,827 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 23:20:26,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:20:26,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 23:20:26,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=1030, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 23:20:26,827 INFO L87 Difference]: Start difference. First operand 10503 states and 35176 transitions. Second operand has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:20:29,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:20:29,972 INFO L93 Difference]: Finished difference Result 15891 states and 51516 transitions. [2021-06-05 23:20:29,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-06-05 23:20:29,972 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 23:20:29,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:20:29,992 INFO L225 Difference]: With dead ends: 15891 [2021-06-05 23:20:29,993 INFO L226 Difference]: Without dead ends: 15790 [2021-06-05 23:20:29,993 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2062 ImplicationChecksByTransitivity, 2752.5ms TimeCoverageRelationStatistics Valid=1124, Invalid=5682, Unknown=0, NotChecked=0, Total=6806 [2021-06-05 23:20:30,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15790 states. [2021-06-05 23:20:30,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15790 to 10597. [2021-06-05 23:20:30,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10597 states, 10596 states have (on average 3.349754624386561) internal successors, (35494), 10596 states have internal predecessors, (35494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:20:30,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10597 states to 10597 states and 35494 transitions. [2021-06-05 23:20:30,160 INFO L78 Accepts]: Start accepts. Automaton has 10597 states and 35494 transitions. Word has length 36 [2021-06-05 23:20:30,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:20:30,161 INFO L482 AbstractCegarLoop]: Abstraction has 10597 states and 35494 transitions. [2021-06-05 23:20:30,161 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:20:30,161 INFO L276 IsEmpty]: Start isEmpty. Operand 10597 states and 35494 transitions. [2021-06-05 23:20:30,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 23:20:30,172 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:20:30,172 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:20:30,372 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable851,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:20:30,373 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:20:30,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:20:30,373 INFO L82 PathProgramCache]: Analyzing trace with hash -1740189507, now seen corresponding path program 108 times [2021-06-05 23:20:30,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:20:30,373 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908410958] [2021-06-05 23:20:30,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:20:30,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:20:30,624 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:20:30,624 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:20:30,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908410958] [2021-06-05 23:20:30,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908410958] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:20:30,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959260039] [2021-06-05 23:20:30,624 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:20:30,648 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 23:20:30,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:20:30,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 23:20:30,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:20:31,155 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:20:31,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [959260039] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:20:31,155 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:20:31,155 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 36 [2021-06-05 23:20:31,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540175269] [2021-06-05 23:20:31,156 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 23:20:31,156 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:20:31,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 23:20:31,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=274, Invalid=1058, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 23:20:31,156 INFO L87 Difference]: Start difference. First operand 10597 states and 35494 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:20:34,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:20:34,455 INFO L93 Difference]: Finished difference Result 19422 states and 61842 transitions. [2021-06-05 23:20:34,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-06-05 23:20:34,455 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 23:20:34,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:20:34,481 INFO L225 Difference]: With dead ends: 19422 [2021-06-05 23:20:34,481 INFO L226 Difference]: Without dead ends: 19250 [2021-06-05 23:20:34,481 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2478 ImplicationChecksByTransitivity, 2743.1ms TimeCoverageRelationStatistics Valid=1438, Invalid=6572, Unknown=0, NotChecked=0, Total=8010 [2021-06-05 23:20:34,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19250 states. [2021-06-05 23:20:34,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19250 to 10563. [2021-06-05 23:20:34,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10563 states, 10562 states have (on average 3.347661427759894) internal successors, (35358), 10562 states have internal predecessors, (35358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:20:34,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10563 states to 10563 states and 35358 transitions. [2021-06-05 23:20:34,703 INFO L78 Accepts]: Start accepts. Automaton has 10563 states and 35358 transitions. Word has length 36 [2021-06-05 23:20:34,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:20:34,703 INFO L482 AbstractCegarLoop]: Abstraction has 10563 states and 35358 transitions. [2021-06-05 23:20:34,703 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:20:34,703 INFO L276 IsEmpty]: Start isEmpty. Operand 10563 states and 35358 transitions. [2021-06-05 23:20:34,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 23:20:34,715 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:20:34,715 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:20:34,915 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable855 [2021-06-05 23:20:34,915 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:20:34,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:20:34,915 INFO L82 PathProgramCache]: Analyzing trace with hash -1557849495, now seen corresponding path program 109 times [2021-06-05 23:20:34,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:20:34,915 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897367823] [2021-06-05 23:20:34,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:20:34,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:20:35,240 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:20:35,241 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:20:35,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897367823] [2021-06-05 23:20:35,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897367823] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:20:35,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [758038327] [2021-06-05 23:20:35,241 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:20:35,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:20:35,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 23:20:35,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:20:35,877 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:20:35,877 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [758038327] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:20:35,877 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:20:35,877 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 35 [2021-06-05 23:20:35,877 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096403592] [2021-06-05 23:20:35,877 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 23:20:35,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:20:35,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 23:20:35,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=1034, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 23:20:35,878 INFO L87 Difference]: Start difference. First operand 10563 states and 35358 transitions. Second operand has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:20:38,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:20:38,776 INFO L93 Difference]: Finished difference Result 15911 states and 51486 transitions. [2021-06-05 23:20:38,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-05 23:20:38,776 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 23:20:38,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:20:38,798 INFO L225 Difference]: With dead ends: 15911 [2021-06-05 23:20:38,799 INFO L226 Difference]: Without dead ends: 15779 [2021-06-05 23:20:38,799 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1693 ImplicationChecksByTransitivity, 2378.0ms TimeCoverageRelationStatistics Valid=1006, Invalid=4846, Unknown=0, NotChecked=0, Total=5852 [2021-06-05 23:20:38,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15779 states. [2021-06-05 23:20:38,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15779 to 10589. [2021-06-05 23:20:38,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10589 states, 10588 states have (on average 3.3488855307895733) internal successors, (35458), 10588 states have internal predecessors, (35458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:20:38,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10589 states to 10589 states and 35458 transitions. [2021-06-05 23:20:38,969 INFO L78 Accepts]: Start accepts. Automaton has 10589 states and 35458 transitions. Word has length 36 [2021-06-05 23:20:38,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:20:38,969 INFO L482 AbstractCegarLoop]: Abstraction has 10589 states and 35458 transitions. [2021-06-05 23:20:38,969 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:20:38,969 INFO L276 IsEmpty]: Start isEmpty. Operand 10589 states and 35458 transitions. [2021-06-05 23:20:38,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 23:20:38,981 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:20:38,982 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:20:39,182 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable859,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:20:39,182 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:20:39,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:20:39,182 INFO L82 PathProgramCache]: Analyzing trace with hash 647993705, now seen corresponding path program 110 times [2021-06-05 23:20:39,182 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:20:39,182 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395280401] [2021-06-05 23:20:39,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:20:39,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:20:39,433 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:20:39,433 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:20:39,433 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395280401] [2021-06-05 23:20:39,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395280401] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:20:39,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1281345945] [2021-06-05 23:20:39,434 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:20:39,516 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:20:39,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:20:39,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 23:20:39,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:20:40,022 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:20:40,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1281345945] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:20:40,023 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:20:40,023 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 36 [2021-06-05 23:20:40,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627534858] [2021-06-05 23:20:40,023 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 23:20:40,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:20:40,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 23:20:40,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=267, Invalid=1065, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 23:20:40,023 INFO L87 Difference]: Start difference. First operand 10589 states and 35458 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:20:43,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:20:43,679 INFO L93 Difference]: Finished difference Result 19441 states and 61873 transitions. [2021-06-05 23:20:43,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-06-05 23:20:43,679 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 23:20:43,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:20:43,706 INFO L225 Difference]: With dead ends: 19441 [2021-06-05 23:20:43,706 INFO L226 Difference]: Without dead ends: 19269 [2021-06-05 23:20:43,706 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2631 ImplicationChecksByTransitivity, 2804.5ms TimeCoverageRelationStatistics Valid=1490, Invalid=6882, Unknown=0, NotChecked=0, Total=8372 [2021-06-05 23:20:43,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19269 states. [2021-06-05 23:20:43,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19269 to 10555. [2021-06-05 23:20:43,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10555 states, 10554 states have (on average 3.3471669509190827) internal successors, (35326), 10554 states have internal predecessors, (35326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:20:43,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10555 states to 10555 states and 35326 transitions. [2021-06-05 23:20:43,908 INFO L78 Accepts]: Start accepts. Automaton has 10555 states and 35326 transitions. Word has length 36 [2021-06-05 23:20:43,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:20:43,909 INFO L482 AbstractCegarLoop]: Abstraction has 10555 states and 35326 transitions. [2021-06-05 23:20:43,909 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:20:43,909 INFO L276 IsEmpty]: Start isEmpty. Operand 10555 states and 35326 transitions. [2021-06-05 23:20:43,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 23:20:43,920 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:20:43,920 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:20:44,120 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable869 [2021-06-05 23:20:44,120 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:20:44,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:20:44,121 INFO L82 PathProgramCache]: Analyzing trace with hash 278308525, now seen corresponding path program 111 times [2021-06-05 23:20:44,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:20:44,121 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254061855] [2021-06-05 23:20:44,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:20:44,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:20:44,466 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:20:44,466 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:20:44,467 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254061855] [2021-06-05 23:20:44,467 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [254061855] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:20:44,467 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [369799179] [2021-06-05 23:20:44,467 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:20:44,490 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 23:20:44,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:20:44,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 23:20:44,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:20:45,061 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:20:45,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [369799179] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:20:45,061 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:20:45,061 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 34 [2021-06-05 23:20:45,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392881186] [2021-06-05 23:20:45,062 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 23:20:45,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:20:45,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 23:20:45,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=220, Invalid=970, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 23:20:45,062 INFO L87 Difference]: Start difference. First operand 10555 states and 35326 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:20:47,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:20:47,960 INFO L93 Difference]: Finished difference Result 15745 states and 51052 transitions. [2021-06-05 23:20:47,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-06-05 23:20:47,961 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 23:20:47,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:20:47,983 INFO L225 Difference]: With dead ends: 15745 [2021-06-05 23:20:47,983 INFO L226 Difference]: Without dead ends: 15613 [2021-06-05 23:20:47,983 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1952 ImplicationChecksByTransitivity, 2629.0ms TimeCoverageRelationStatistics Valid=1109, Invalid=5371, Unknown=0, NotChecked=0, Total=6480 [2021-06-05 23:20:47,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15613 states. [2021-06-05 23:20:48,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15613 to 10573. [2021-06-05 23:20:48,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10573 states, 10572 states have (on average 3.3469542186908816) internal successors, (35384), 10572 states have internal predecessors, (35384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:20:48,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10573 states to 10573 states and 35384 transitions. [2021-06-05 23:20:48,154 INFO L78 Accepts]: Start accepts. Automaton has 10573 states and 35384 transitions. Word has length 36 [2021-06-05 23:20:48,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:20:48,154 INFO L482 AbstractCegarLoop]: Abstraction has 10573 states and 35384 transitions. [2021-06-05 23:20:48,154 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:20:48,154 INFO L276 IsEmpty]: Start isEmpty. Operand 10573 states and 35384 transitions. [2021-06-05 23:20:48,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 23:20:48,166 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:20:48,166 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:20:48,366 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable873 [2021-06-05 23:20:48,366 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:20:48,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:20:48,366 INFO L82 PathProgramCache]: Analyzing trace with hash -1810815571, now seen corresponding path program 112 times [2021-06-05 23:20:48,366 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:20:48,366 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107020491] [2021-06-05 23:20:48,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:20:48,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:20:48,619 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:20:48,620 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:20:48,620 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107020491] [2021-06-05 23:20:48,620 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107020491] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:20:48,620 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37376997] [2021-06-05 23:20:48,620 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:20:48,644 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:20:48,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:20:48,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 23:20:48,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:20:49,194 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:20:49,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [37376997] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:20:49,195 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:20:49,195 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 37 [2021-06-05 23:20:49,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422013811] [2021-06-05 23:20:49,195 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 23:20:49,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:20:49,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 23:20:49,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=267, Invalid=1139, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 23:20:49,195 INFO L87 Difference]: Start difference. First operand 10573 states and 35384 transitions. Second operand has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:20:52,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:20:52,966 INFO L93 Difference]: Finished difference Result 19005 states and 60520 transitions. [2021-06-05 23:20:52,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2021-06-05 23:20:52,967 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 23:20:52,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:20:52,990 INFO L225 Difference]: With dead ends: 19005 [2021-06-05 23:20:52,990 INFO L226 Difference]: Without dead ends: 18833 [2021-06-05 23:20:52,990 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3208 ImplicationChecksByTransitivity, 3215.4ms TimeCoverageRelationStatistics Valid=1671, Invalid=8229, Unknown=0, NotChecked=0, Total=9900 [2021-06-05 23:20:53,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18833 states. [2021-06-05 23:20:53,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18833 to 10507. [2021-06-05 23:20:53,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10507 states, 10506 states have (on average 3.3436131734247097) internal successors, (35128), 10506 states have internal predecessors, (35128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:20:53,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10507 states to 10507 states and 35128 transitions. [2021-06-05 23:20:53,184 INFO L78 Accepts]: Start accepts. Automaton has 10507 states and 35128 transitions. Word has length 36 [2021-06-05 23:20:53,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:20:53,184 INFO L482 AbstractCegarLoop]: Abstraction has 10507 states and 35128 transitions. [2021-06-05 23:20:53,184 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:20:53,184 INFO L276 IsEmpty]: Start isEmpty. Operand 10507 states and 35128 transitions. [2021-06-05 23:20:53,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 23:20:53,195 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:20:53,195 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:20:53,396 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable880 [2021-06-05 23:20:53,396 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:20:53,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:20:53,396 INFO L82 PathProgramCache]: Analyzing trace with hash 1127965129, now seen corresponding path program 113 times [2021-06-05 23:20:53,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:20:53,396 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285257165] [2021-06-05 23:20:53,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:20:53,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:20:53,664 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:20:53,664 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:20:53,664 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285257165] [2021-06-05 23:20:53,664 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285257165] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:20:53,664 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1322106199] [2021-06-05 23:20:53,664 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:20:53,688 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 23:20:53,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:20:53,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 23:20:53,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:20:54,246 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:20:54,246 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1322106199] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:20:54,246 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:20:54,246 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-06-05 23:20:54,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362116246] [2021-06-05 23:20:54,246 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 23:20:54,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:20:54,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 23:20:54,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=990, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 23:20:54,247 INFO L87 Difference]: Start difference. First operand 10507 states and 35128 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:20:55,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:20:55,755 INFO L93 Difference]: Finished difference Result 12415 states and 40881 transitions. [2021-06-05 23:20:55,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 23:20:55,755 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 23:20:55,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:20:55,773 INFO L225 Difference]: With dead ends: 12415 [2021-06-05 23:20:55,773 INFO L226 Difference]: Without dead ends: 12317 [2021-06-05 23:20:55,773 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 717 ImplicationChecksByTransitivity, 1437.9ms TimeCoverageRelationStatistics Valid=529, Invalid=2333, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 23:20:55,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12317 states. [2021-06-05 23:20:55,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12317 to 10543. [2021-06-05 23:20:55,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10543 states, 10542 states have (on average 3.34357806867767) internal successors, (35248), 10542 states have internal predecessors, (35248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:20:55,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10543 states to 10543 states and 35248 transitions. [2021-06-05 23:20:55,952 INFO L78 Accepts]: Start accepts. Automaton has 10543 states and 35248 transitions. Word has length 36 [2021-06-05 23:20:55,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:20:55,952 INFO L482 AbstractCegarLoop]: Abstraction has 10543 states and 35248 transitions. [2021-06-05 23:20:55,952 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:20:55,953 INFO L276 IsEmpty]: Start isEmpty. Operand 10543 states and 35248 transitions. [2021-06-05 23:20:55,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 23:20:55,964 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:20:55,964 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:20:56,164 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable884 [2021-06-05 23:20:56,164 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:20:56,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:20:56,165 INFO L82 PathProgramCache]: Analyzing trace with hash 2049667269, now seen corresponding path program 114 times [2021-06-05 23:20:56,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:20:56,165 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7745367] [2021-06-05 23:20:56,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:20:56,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:20:56,431 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:20:56,432 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:20:56,432 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7745367] [2021-06-05 23:20:56,432 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7745367] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:20:56,432 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [687732474] [2021-06-05 23:20:56,432 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:20:56,456 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 23:20:56,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:20:56,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 23:20:56,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:20:57,005 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:20:57,006 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [687732474] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:20:57,006 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:20:57,006 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 33 [2021-06-05 23:20:57,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444859027] [2021-06-05 23:20:57,006 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 23:20:57,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:20:57,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 23:20:57,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=906, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 23:20:57,006 INFO L87 Difference]: Start difference. First operand 10543 states and 35248 transitions. Second operand has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:20:58,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:20:58,332 INFO L93 Difference]: Finished difference Result 13178 states and 43112 transitions. [2021-06-05 23:20:58,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 23:20:58,333 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 23:20:58,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:20:58,351 INFO L225 Difference]: With dead ends: 13178 [2021-06-05 23:20:58,351 INFO L226 Difference]: Without dead ends: 13046 [2021-06-05 23:20:58,352 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 608 ImplicationChecksByTransitivity, 1272.5ms TimeCoverageRelationStatistics Valid=523, Invalid=1927, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 23:20:58,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13046 states. [2021-06-05 23:20:58,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13046 to 10533. [2021-06-05 23:20:58,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10533 states, 10532 states have (on average 3.343334599316369) internal successors, (35212), 10532 states have internal predecessors, (35212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:20:58,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10533 states to 10533 states and 35212 transitions. [2021-06-05 23:20:58,510 INFO L78 Accepts]: Start accepts. Automaton has 10533 states and 35212 transitions. Word has length 36 [2021-06-05 23:20:58,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:20:58,510 INFO L482 AbstractCegarLoop]: Abstraction has 10533 states and 35212 transitions. [2021-06-05 23:20:58,510 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:20:58,510 INFO L276 IsEmpty]: Start isEmpty. Operand 10533 states and 35212 transitions. [2021-06-05 23:20:58,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 23:20:58,521 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:20:58,521 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:20:58,722 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable888 [2021-06-05 23:20:58,722 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:20:58,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:20:58,722 INFO L82 PathProgramCache]: Analyzing trace with hash 789627593, now seen corresponding path program 115 times [2021-06-05 23:20:58,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:20:58,722 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920968122] [2021-06-05 23:20:58,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:20:58,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:20:59,024 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:20:59,025 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:20:59,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920968122] [2021-06-05 23:20:59,025 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920968122] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:20:59,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718382049] [2021-06-05 23:20:59,025 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:20:59,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:20:59,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 23:20:59,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:20:59,536 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:20:59,536 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1718382049] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:20:59,536 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:20:59,537 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-06-05 23:20:59,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511796562] [2021-06-05 23:20:59,537 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 23:20:59,537 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:20:59,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 23:20:59,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=1001, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 23:20:59,537 INFO L87 Difference]: Start difference. First operand 10533 states and 35212 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:21:00,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:21:00,755 INFO L93 Difference]: Finished difference Result 11908 states and 39154 transitions. [2021-06-05 23:21:00,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 23:21:00,756 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 23:21:00,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:21:00,771 INFO L225 Difference]: With dead ends: 11908 [2021-06-05 23:21:00,772 INFO L226 Difference]: Without dead ends: 11743 [2021-06-05 23:21:00,772 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 643 ImplicationChecksByTransitivity, 1200.5ms TimeCoverageRelationStatistics Valid=443, Invalid=2313, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 23:21:00,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11743 states. [2021-06-05 23:21:00,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11743 to 10533. [2021-06-05 23:21:00,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10533 states, 10532 states have (on average 3.343334599316369) internal successors, (35212), 10532 states have internal predecessors, (35212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:21:00,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10533 states to 10533 states and 35212 transitions. [2021-06-05 23:21:00,929 INFO L78 Accepts]: Start accepts. Automaton has 10533 states and 35212 transitions. Word has length 36 [2021-06-05 23:21:00,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:21:00,930 INFO L482 AbstractCegarLoop]: Abstraction has 10533 states and 35212 transitions. [2021-06-05 23:21:00,930 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:21:00,930 INFO L276 IsEmpty]: Start isEmpty. Operand 10533 states and 35212 transitions. [2021-06-05 23:21:00,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 23:21:00,941 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:21:00,941 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:21:01,142 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable895,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:21:01,142 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:21:01,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:21:01,142 INFO L82 PathProgramCache]: Analyzing trace with hash -285259715, now seen corresponding path program 116 times [2021-06-05 23:21:01,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:21:01,142 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211053292] [2021-06-05 23:21:01,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:21:01,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:21:01,472 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:21:01,472 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:21:01,472 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211053292] [2021-06-05 23:21:01,472 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211053292] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:21:01,472 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [618551623] [2021-06-05 23:21:01,472 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:21:01,496 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:21:01,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:21:01,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 23:21:01,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:21:02,186 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:21:02,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [618551623] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:21:02,187 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:21:02,187 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 34 [2021-06-05 23:21:02,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803591845] [2021-06-05 23:21:02,187 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 23:21:02,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:21:02,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 23:21:02,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=990, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 23:21:02,187 INFO L87 Difference]: Start difference. First operand 10533 states and 35212 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:21:05,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:21:05,788 INFO L93 Difference]: Finished difference Result 17393 states and 55767 transitions. [2021-06-05 23:21:05,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-06-05 23:21:05,789 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 23:21:05,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:21:05,813 INFO L225 Difference]: With dead ends: 17393 [2021-06-05 23:21:05,813 INFO L226 Difference]: Without dead ends: 17267 [2021-06-05 23:21:05,813 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2198 ImplicationChecksByTransitivity, 2919.2ms TimeCoverageRelationStatistics Valid=1027, Invalid=5945, Unknown=0, NotChecked=0, Total=6972 [2021-06-05 23:21:05,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17267 states. [2021-06-05 23:21:05,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17267 to 10528. [2021-06-05 23:21:05,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10528 states, 10527 states have (on average 3.3423577467464614) internal successors, (35185), 10527 states have internal predecessors, (35185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:21:06,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10528 states to 10528 states and 35185 transitions. [2021-06-05 23:21:06,001 INFO L78 Accepts]: Start accepts. Automaton has 10528 states and 35185 transitions. Word has length 36 [2021-06-05 23:21:06,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:21:06,001 INFO L482 AbstractCegarLoop]: Abstraction has 10528 states and 35185 transitions. [2021-06-05 23:21:06,001 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:21:06,001 INFO L276 IsEmpty]: Start isEmpty. Operand 10528 states and 35185 transitions. [2021-06-05 23:21:06,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 23:21:06,012 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:21:06,013 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:21:06,214 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable900,116 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:21:06,214 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:21:06,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:21:06,215 INFO L82 PathProgramCache]: Analyzing trace with hash 589449021, now seen corresponding path program 117 times [2021-06-05 23:21:06,215 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:21:06,215 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889281385] [2021-06-05 23:21:06,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:21:06,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:21:06,556 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:21:06,556 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:21:06,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889281385] [2021-06-05 23:21:06,556 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889281385] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:21:06,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [727958957] [2021-06-05 23:21:06,556 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:21:06,580 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 23:21:06,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:21:06,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 23:21:06,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:21:07,151 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:21:07,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [727958957] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:21:07,151 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:21:07,151 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 34 [2021-06-05 23:21:07,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760934956] [2021-06-05 23:21:07,151 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 23:21:07,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:21:07,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 23:21:07,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=988, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 23:21:07,152 INFO L87 Difference]: Start difference. First operand 10528 states and 35185 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:21:10,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:21:10,323 INFO L93 Difference]: Finished difference Result 16941 states and 54280 transitions. [2021-06-05 23:21:10,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-06-05 23:21:10,324 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 23:21:10,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:21:10,346 INFO L225 Difference]: With dead ends: 16941 [2021-06-05 23:21:10,347 INFO L226 Difference]: Without dead ends: 16821 [2021-06-05 23:21:10,347 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1994 ImplicationChecksByTransitivity, 2618.0ms TimeCoverageRelationStatistics Valid=913, Invalid=5567, Unknown=0, NotChecked=0, Total=6480 [2021-06-05 23:21:10,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16821 states. [2021-06-05 23:21:10,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16821 to 10530. [2021-06-05 23:21:10,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10530 states, 10529 states have (on average 3.3424826669199352) internal successors, (35193), 10529 states have internal predecessors, (35193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:21:10,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10530 states to 10530 states and 35193 transitions. [2021-06-05 23:21:10,528 INFO L78 Accepts]: Start accepts. Automaton has 10530 states and 35193 transitions. Word has length 36 [2021-06-05 23:21:10,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:21:10,528 INFO L482 AbstractCegarLoop]: Abstraction has 10530 states and 35193 transitions. [2021-06-05 23:21:10,528 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:21:10,528 INFO L276 IsEmpty]: Start isEmpty. Operand 10530 states and 35193 transitions. [2021-06-05 23:21:10,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 23:21:10,540 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:21:10,540 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:21:10,745 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable911,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:21:10,745 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:21:10,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:21:10,745 INFO L82 PathProgramCache]: Analyzing trace with hash 2077724221, now seen corresponding path program 118 times [2021-06-05 23:21:10,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:21:10,745 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965716965] [2021-06-05 23:21:10,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:21:10,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:21:10,970 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:21:10,970 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:21:10,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965716965] [2021-06-05 23:21:10,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965716965] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:21:10,971 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1290003347] [2021-06-05 23:21:10,971 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:21:10,993 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:21:10,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:21:10,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 23:21:10,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:21:11,547 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:21:11,547 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1290003347] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:21:11,547 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:21:11,547 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2021-06-05 23:21:11,547 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452776582] [2021-06-05 23:21:11,547 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 23:21:11,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:21:11,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 23:21:11,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=1136, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 23:21:11,547 INFO L87 Difference]: Start difference. First operand 10530 states and 35193 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:21:15,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:21:15,580 INFO L93 Difference]: Finished difference Result 17822 states and 56788 transitions. [2021-06-05 23:21:15,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2021-06-05 23:21:15,580 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 23:21:15,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:21:15,606 INFO L225 Difference]: With dead ends: 17822 [2021-06-05 23:21:15,606 INFO L226 Difference]: Without dead ends: 17612 [2021-06-05 23:21:15,607 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3267 ImplicationChecksByTransitivity, 2956.1ms TimeCoverageRelationStatistics Valid=1241, Invalid=8659, Unknown=0, NotChecked=0, Total=9900 [2021-06-05 23:21:15,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17612 states. [2021-06-05 23:21:15,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17612 to 10530. [2021-06-05 23:21:15,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10530 states, 10529 states have (on average 3.342102763795232) internal successors, (35189), 10529 states have internal predecessors, (35189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:21:15,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10530 states to 10530 states and 35189 transitions. [2021-06-05 23:21:15,785 INFO L78 Accepts]: Start accepts. Automaton has 10530 states and 35189 transitions. Word has length 36 [2021-06-05 23:21:15,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:21:15,785 INFO L482 AbstractCegarLoop]: Abstraction has 10530 states and 35189 transitions. [2021-06-05 23:21:15,785 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:21:15,785 INFO L276 IsEmpty]: Start isEmpty. Operand 10530 states and 35189 transitions. [2021-06-05 23:21:15,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 23:21:15,796 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:21:15,796 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:21:15,996 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable921 [2021-06-05 23:21:15,996 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:21:15,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:21:15,997 INFO L82 PathProgramCache]: Analyzing trace with hash -1499675075, now seen corresponding path program 119 times [2021-06-05 23:21:15,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:21:15,997 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185621047] [2021-06-05 23:21:15,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:21:15,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:21:16,233 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:21:16,233 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:21:16,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185621047] [2021-06-05 23:21:16,233 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185621047] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:21:16,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2065572102] [2021-06-05 23:21:16,233 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:21:16,257 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 23:21:16,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:21:16,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 23:21:16,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:21:16,821 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:21:16,821 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2065572102] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:21:16,821 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:21:16,821 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2021-06-05 23:21:16,822 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225347895] [2021-06-05 23:21:16,822 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 23:21:16,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:21:16,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 23:21:16,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=1110, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 23:21:16,822 INFO L87 Difference]: Start difference. First operand 10530 states and 35189 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:21:21,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:21:21,284 INFO L93 Difference]: Finished difference Result 20309 states and 64379 transitions. [2021-06-05 23:21:21,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2021-06-05 23:21:21,284 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 23:21:21,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:21:21,312 INFO L225 Difference]: With dead ends: 20309 [2021-06-05 23:21:21,313 INFO L226 Difference]: Without dead ends: 20119 [2021-06-05 23:21:21,313 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3400 ImplicationChecksByTransitivity, 3426.0ms TimeCoverageRelationStatistics Valid=1520, Invalid=8782, Unknown=0, NotChecked=0, Total=10302 [2021-06-05 23:21:21,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20119 states. [2021-06-05 23:21:21,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20119 to 10452. [2021-06-05 23:21:21,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10452 states, 10451 states have (on average 3.3371926131470673) internal successors, (34877), 10451 states have internal predecessors, (34877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:21:21,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10452 states to 10452 states and 34877 transitions. [2021-06-05 23:21:21,533 INFO L78 Accepts]: Start accepts. Automaton has 10452 states and 34877 transitions. Word has length 36 [2021-06-05 23:21:21,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:21:21,533 INFO L482 AbstractCegarLoop]: Abstraction has 10452 states and 34877 transitions. [2021-06-05 23:21:21,533 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:21:21,533 INFO L276 IsEmpty]: Start isEmpty. Operand 10452 states and 34877 transitions. [2021-06-05 23:21:21,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 23:21:21,544 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:21:21,544 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:21:21,745 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable925 [2021-06-05 23:21:21,745 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:21:21,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:21:21,745 INFO L82 PathProgramCache]: Analyzing trace with hash -181508519, now seen corresponding path program 120 times [2021-06-05 23:21:21,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:21:21,745 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281844896] [2021-06-05 23:21:21,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:21:21,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:21:22,120 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:21:22,120 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:21:22,120 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281844896] [2021-06-05 23:21:22,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281844896] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:21:22,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [639270188] [2021-06-05 23:21:22,121 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:21:22,144 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 23:21:22,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:21:22,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 23:21:22,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:21:22,823 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:21:22,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [639270188] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:21:22,824 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:21:22,824 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 34 [2021-06-05 23:21:22,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719318727] [2021-06-05 23:21:22,824 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 23:21:22,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:21:22,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 23:21:22,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=1051, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 23:21:22,824 INFO L87 Difference]: Start difference. First operand 10452 states and 34877 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:21:24,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:21:24,633 INFO L93 Difference]: Finished difference Result 12144 states and 39477 transitions. [2021-06-05 23:21:24,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 23:21:24,634 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 23:21:24,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:21:24,652 INFO L225 Difference]: With dead ends: 12144 [2021-06-05 23:21:24,652 INFO L226 Difference]: Without dead ends: 12030 [2021-06-05 23:21:24,653 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 763 ImplicationChecksByTransitivity, 1752.9ms TimeCoverageRelationStatistics Valid=417, Invalid=2775, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 23:21:24,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12030 states. [2021-06-05 23:21:24,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12030 to 10658. [2021-06-05 23:21:24,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10658 states, 10657 states have (on average 3.337993806887492) internal successors, (35573), 10657 states have internal predecessors, (35573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:21:24,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10658 states to 10658 states and 35573 transitions. [2021-06-05 23:21:24,864 INFO L78 Accepts]: Start accepts. Automaton has 10658 states and 35573 transitions. Word has length 36 [2021-06-05 23:21:24,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:21:24,864 INFO L482 AbstractCegarLoop]: Abstraction has 10658 states and 35573 transitions. [2021-06-05 23:21:24,865 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:21:24,865 INFO L276 IsEmpty]: Start isEmpty. Operand 10658 states and 35573 transitions. [2021-06-05 23:21:24,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 23:21:24,876 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:21:24,876 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:21:25,076 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable929,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:21:25,077 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:21:25,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:21:25,077 INFO L82 PathProgramCache]: Analyzing trace with hash -416903851, now seen corresponding path program 121 times [2021-06-05 23:21:25,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:21:25,077 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250913585] [2021-06-05 23:21:25,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:21:25,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:21:25,398 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:21:25,398 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:21:25,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250913585] [2021-06-05 23:21:25,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250913585] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:21:25,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790681615] [2021-06-05 23:21:25,398 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:21:25,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:21:25,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 23:21:25,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:21:26,158 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:21:26,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1790681615] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:21:26,158 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:21:26,158 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 37 [2021-06-05 23:21:26,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902170085] [2021-06-05 23:21:26,159 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 23:21:26,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:21:26,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 23:21:26,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=1179, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 23:21:26,159 INFO L87 Difference]: Start difference. First operand 10658 states and 35573 transitions. Second operand has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:21:29,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:21:29,684 INFO L93 Difference]: Finished difference Result 17179 states and 55018 transitions. [2021-06-05 23:21:29,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-06-05 23:21:29,685 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 23:21:29,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:21:29,708 INFO L225 Difference]: With dead ends: 17179 [2021-06-05 23:21:29,708 INFO L226 Difference]: Without dead ends: 17051 [2021-06-05 23:21:29,708 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2559 ImplicationChecksByTransitivity, 3209.7ms TimeCoverageRelationStatistics Valid=1305, Invalid=6705, Unknown=0, NotChecked=0, Total=8010 [2021-06-05 23:21:29,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17051 states. [2021-06-05 23:21:29,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17051 to 10821. [2021-06-05 23:21:29,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10821 states, 10820 states have (on average 3.340018484288355) internal successors, (36139), 10820 states have internal predecessors, (36139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:21:29,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10821 states to 10821 states and 36139 transitions. [2021-06-05 23:21:29,893 INFO L78 Accepts]: Start accepts. Automaton has 10821 states and 36139 transitions. Word has length 36 [2021-06-05 23:21:29,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:21:29,893 INFO L482 AbstractCegarLoop]: Abstraction has 10821 states and 36139 transitions. [2021-06-05 23:21:29,893 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:21:29,893 INFO L276 IsEmpty]: Start isEmpty. Operand 10821 states and 36139 transitions. [2021-06-05 23:21:29,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 23:21:29,905 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:21:29,905 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:21:30,105 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable940,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:21:30,105 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:21:30,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:21:30,105 INFO L82 PathProgramCache]: Analyzing trace with hash 300664149, now seen corresponding path program 122 times [2021-06-05 23:21:30,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:21:30,106 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003491543] [2021-06-05 23:21:30,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:21:30,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:21:30,433 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:21:30,433 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:21:30,433 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003491543] [2021-06-05 23:21:30,433 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003491543] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:21:30,433 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1588252916] [2021-06-05 23:21:30,433 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:21:30,457 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:21:30,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:21:30,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 23:21:30,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:21:31,121 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:21:31,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1588252916] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:21:31,121 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:21:31,121 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 17] total 35 [2021-06-05 23:21:31,121 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926056502] [2021-06-05 23:21:31,121 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 23:21:31,121 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:21:31,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 23:21:31,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=1019, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 23:21:31,122 INFO L87 Difference]: Start difference. First operand 10821 states and 36139 transitions. Second operand has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:21:34,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:21:34,892 INFO L93 Difference]: Finished difference Result 19269 states and 61375 transitions. [2021-06-05 23:21:34,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-06-05 23:21:34,893 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 23:21:34,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:21:34,919 INFO L225 Difference]: With dead ends: 19269 [2021-06-05 23:21:34,919 INFO L226 Difference]: Without dead ends: 19100 [2021-06-05 23:21:34,920 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2565 ImplicationChecksByTransitivity, 3263.4ms TimeCoverageRelationStatistics Valid=1427, Invalid=6229, Unknown=0, NotChecked=0, Total=7656 [2021-06-05 23:21:34,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19100 states. [2021-06-05 23:21:35,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19100 to 10812. [2021-06-05 23:21:35,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10812 states, 10811 states have (on average 3.339654056054019) internal successors, (36105), 10811 states have internal predecessors, (36105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:21:35,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10812 states to 10812 states and 36105 transitions. [2021-06-05 23:21:35,147 INFO L78 Accepts]: Start accepts. Automaton has 10812 states and 36105 transitions. Word has length 36 [2021-06-05 23:21:35,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:21:35,147 INFO L482 AbstractCegarLoop]: Abstraction has 10812 states and 36105 transitions. [2021-06-05 23:21:35,147 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:21:35,147 INFO L276 IsEmpty]: Start isEmpty. Operand 10812 states and 36105 transitions. [2021-06-05 23:21:35,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 23:21:35,159 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:21:35,159 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:21:35,359 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable949,122 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:21:35,359 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:21:35,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:21:35,360 INFO L82 PathProgramCache]: Analyzing trace with hash -1336502783, now seen corresponding path program 123 times [2021-06-05 23:21:35,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:21:35,360 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775750278] [2021-06-05 23:21:35,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:21:35,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:21:35,679 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:21:35,679 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:21:35,679 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775750278] [2021-06-05 23:21:35,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775750278] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:21:35,679 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1496357576] [2021-06-05 23:21:35,679 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:21:35,703 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 23:21:35,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:21:35,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 23:21:35,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:21:36,386 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:21:36,387 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1496357576] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:21:36,387 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:21:36,387 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 34 [2021-06-05 23:21:36,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819170901] [2021-06-05 23:21:36,387 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 23:21:36,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:21:36,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 23:21:36,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=1038, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 23:21:36,387 INFO L87 Difference]: Start difference. First operand 10812 states and 36105 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:21:38,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:21:38,170 INFO L93 Difference]: Finished difference Result 13375 states and 43502 transitions. [2021-06-05 23:21:38,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 23:21:38,170 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 23:21:38,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:21:38,188 INFO L225 Difference]: With dead ends: 13375 [2021-06-05 23:21:38,188 INFO L226 Difference]: Without dead ends: 13261 [2021-06-05 23:21:38,188 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 807 ImplicationChecksByTransitivity, 1745.6ms TimeCoverageRelationStatistics Valid=466, Invalid=2956, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 23:21:38,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13261 states. [2021-06-05 23:21:38,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13261 to 10838. [2021-06-05 23:21:38,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10838 states, 10837 states have (on average 3.3399464796530407) internal successors, (36195), 10837 states have internal predecessors, (36195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:21:38,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10838 states to 10838 states and 36195 transitions. [2021-06-05 23:21:38,346 INFO L78 Accepts]: Start accepts. Automaton has 10838 states and 36195 transitions. Word has length 36 [2021-06-05 23:21:38,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:21:38,346 INFO L482 AbstractCegarLoop]: Abstraction has 10838 states and 36195 transitions. [2021-06-05 23:21:38,346 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:21:38,346 INFO L276 IsEmpty]: Start isEmpty. Operand 10838 states and 36195 transitions. [2021-06-05 23:21:38,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 23:21:38,358 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:21:38,358 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:21:38,558 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable961,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:21:38,558 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:21:38,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:21:38,558 INFO L82 PathProgramCache]: Analyzing trace with hash 1726366165, now seen corresponding path program 124 times [2021-06-05 23:21:38,558 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:21:38,558 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950761229] [2021-06-05 23:21:38,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:21:38,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:21:38,866 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:21:38,866 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:21:38,866 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950761229] [2021-06-05 23:21:38,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950761229] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:21:38,866 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1205482965] [2021-06-05 23:21:38,866 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 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:21:38,889 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:21:38,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:21:38,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 23:21:38,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:21:39,560 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:21:39,561 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1205482965] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:21:39,561 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:21:39,561 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-06-05 23:21:39,561 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936372077] [2021-06-05 23:21:39,561 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 23:21:39,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:21:39,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 23:21:39,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=1026, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 23:21:39,561 INFO L87 Difference]: Start difference. First operand 10838 states and 36195 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:21:41,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:21:41,378 INFO L93 Difference]: Finished difference Result 12539 states and 41310 transitions. [2021-06-05 23:21:41,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 23:21:41,378 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 23:21:41,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:21:41,394 INFO L225 Difference]: With dead ends: 12539 [2021-06-05 23:21:41,394 INFO L226 Difference]: Without dead ends: 12419 [2021-06-05 23:21:41,395 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 650 ImplicationChecksByTransitivity, 1514.2ms TimeCoverageRelationStatistics Valid=403, Invalid=2353, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 23:21:41,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12419 states. [2021-06-05 23:21:41,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12419 to 10850. [2021-06-05 23:21:41,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10850 states, 10849 states have (on average 3.3397548161120842) internal successors, (36233), 10849 states have internal predecessors, (36233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:21:41,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10850 states to 10850 states and 36233 transitions. [2021-06-05 23:21:41,546 INFO L78 Accepts]: Start accepts. Automaton has 10850 states and 36233 transitions. Word has length 36 [2021-06-05 23:21:41,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:21:41,547 INFO L482 AbstractCegarLoop]: Abstraction has 10850 states and 36233 transitions. [2021-06-05 23:21:41,547 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:21:41,547 INFO L276 IsEmpty]: Start isEmpty. Operand 10850 states and 36233 transitions. [2021-06-05 23:21:41,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 23:21:41,558 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:21:41,559 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:21:41,760 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable972 [2021-06-05 23:21:41,761 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:21:41,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:21:41,761 INFO L82 PathProgramCache]: Analyzing trace with hash 1656256129, now seen corresponding path program 125 times [2021-06-05 23:21:41,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:21:41,761 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002919677] [2021-06-05 23:21:41,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:21:41,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:21:42,086 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:21:42,087 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:21:42,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002919677] [2021-06-05 23:21:42,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002919677] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:21:42,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667626682] [2021-06-05 23:21:42,087 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:21:42,111 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 23:21:42,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:21:42,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 23:21:42,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:21:42,720 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:21:42,720 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1667626682] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:21:42,720 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:21:42,720 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-06-05 23:21:42,721 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249501523] [2021-06-05 23:21:42,721 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 23:21:42,721 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:21:42,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 23:21:42,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=1021, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 23:21:42,721 INFO L87 Difference]: Start difference. First operand 10850 states and 36233 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:21:43,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:21:43,905 INFO L93 Difference]: Finished difference Result 12138 states and 40167 transitions. [2021-06-05 23:21:43,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 23:21:43,906 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 23:21:43,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:21:43,923 INFO L225 Difference]: With dead ends: 12138 [2021-06-05 23:21:43,923 INFO L226 Difference]: Without dead ends: 12058 [2021-06-05 23:21:43,923 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 515 ImplicationChecksByTransitivity, 1250.2ms TimeCoverageRelationStatistics Valid=327, Invalid=1835, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 23:21:43,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12058 states. [2021-06-05 23:21:44,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12058 to 10854. [2021-06-05 23:21:44,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10854 states, 10853 states have (on average 3.3396295955035473) internal successors, (36245), 10853 states have internal predecessors, (36245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:21:44,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10854 states to 10854 states and 36245 transitions. [2021-06-05 23:21:44,107 INFO L78 Accepts]: Start accepts. Automaton has 10854 states and 36245 transitions. Word has length 36 [2021-06-05 23:21:44,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:21:44,107 INFO L482 AbstractCegarLoop]: Abstraction has 10854 states and 36245 transitions. [2021-06-05 23:21:44,107 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:21:44,107 INFO L276 IsEmpty]: Start isEmpty. Operand 10854 states and 36245 transitions. [2021-06-05 23:21:44,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 23:21:44,119 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:21:44,119 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:21:44,328 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable983 [2021-06-05 23:21:44,329 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:21:44,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:21:44,329 INFO L82 PathProgramCache]: Analyzing trace with hash -1157838787, now seen corresponding path program 126 times [2021-06-05 23:21:44,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:21:44,329 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987429717] [2021-06-05 23:21:44,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:21:44,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:21:44,638 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:21:44,639 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:21:44,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987429717] [2021-06-05 23:21:44,639 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987429717] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:21:44,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1911628310] [2021-06-05 23:21:44,639 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:21:44,663 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 23:21:44,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:21:44,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 23:21:44,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:21:45,313 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:21:45,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1911628310] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:21:45,314 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:21:45,314 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 34 [2021-06-05 23:21:45,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726362785] [2021-06-05 23:21:45,314 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 23:21:45,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:21:45,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 23:21:45,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=974, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 23:21:45,314 INFO L87 Difference]: Start difference. First operand 10854 states and 36245 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:21:47,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:21:47,751 INFO L93 Difference]: Finished difference Result 16224 states and 52194 transitions. [2021-06-05 23:21:47,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-05 23:21:47,751 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 23:21:47,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:21:47,773 INFO L225 Difference]: With dead ends: 16224 [2021-06-05 23:21:47,773 INFO L226 Difference]: Without dead ends: 16046 [2021-06-05 23:21:47,773 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1546 ImplicationChecksByTransitivity, 2256.2ms TimeCoverageRelationStatistics Valid=921, Invalid=4049, Unknown=0, NotChecked=0, Total=4970 [2021-06-05 23:21:47,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16046 states. [2021-06-05 23:21:47,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16046 to 10908. [2021-06-05 23:21:47,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10908 states, 10907 states have (on average 3.339323370312643) internal successors, (36422), 10907 states have internal predecessors, (36422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:21:47,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10908 states to 10908 states and 36422 transitions. [2021-06-05 23:21:47,964 INFO L78 Accepts]: Start accepts. Automaton has 10908 states and 36422 transitions. Word has length 36 [2021-06-05 23:21:47,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:21:47,965 INFO L482 AbstractCegarLoop]: Abstraction has 10908 states and 36422 transitions. [2021-06-05 23:21:47,965 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:21:47,965 INFO L276 IsEmpty]: Start isEmpty. Operand 10908 states and 36422 transitions. [2021-06-05 23:21:47,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 23:21:47,976 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:21:47,976 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:21:48,180 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable988 [2021-06-05 23:21:48,181 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:21:48,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:21:48,181 INFO L82 PathProgramCache]: Analyzing trace with hash 1317918593, now seen corresponding path program 127 times [2021-06-05 23:21:48,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:21:48,181 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500252588] [2021-06-05 23:21:48,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:21:48,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:21:48,499 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:21:48,500 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:21:48,500 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500252588] [2021-06-05 23:21:48,500 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [500252588] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:21:48,500 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731328281] [2021-06-05 23:21:48,500 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:21:48,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:21:48,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 23:21:48,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:21:49,219 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:21:49,219 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [731328281] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:21:49,219 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:21:49,219 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-06-05 23:21:49,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978704082] [2021-06-05 23:21:49,219 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 23:21:49,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:21:49,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 23:21:49,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=1024, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 23:21:49,220 INFO L87 Difference]: Start difference. First operand 10908 states and 36422 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:21:50,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:21:50,718 INFO L93 Difference]: Finished difference Result 12270 states and 40536 transitions. [2021-06-05 23:21:50,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 23:21:50,719 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 23:21:50,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:21:50,734 INFO L225 Difference]: With dead ends: 12270 [2021-06-05 23:21:50,734 INFO L226 Difference]: Without dead ends: 12150 [2021-06-05 23:21:50,734 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 580 ImplicationChecksByTransitivity, 1491.3ms TimeCoverageRelationStatistics Valid=387, Invalid=2163, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 23:21:50,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12150 states. [2021-06-05 23:21:50,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12150 to 10888. [2021-06-05 23:21:50,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10888 states, 10887 states have (on average 3.3390281987691743) internal successors, (36352), 10887 states have internal predecessors, (36352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:21:50,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10888 states to 10888 states and 36352 transitions. [2021-06-05 23:21:50,881 INFO L78 Accepts]: Start accepts. Automaton has 10888 states and 36352 transitions. Word has length 36 [2021-06-05 23:21:50,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:21:50,881 INFO L482 AbstractCegarLoop]: Abstraction has 10888 states and 36352 transitions. [2021-06-05 23:21:50,881 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:21:50,881 INFO L276 IsEmpty]: Start isEmpty. Operand 10888 states and 36352 transitions. [2021-06-05 23:21:50,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 23:21:50,892 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:21:50,892 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:21:51,093 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable999,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:21:51,093 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:21:51,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:21:51,093 INFO L82 PathProgramCache]: Analyzing trace with hash -551580651, now seen corresponding path program 128 times [2021-06-05 23:21:51,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:21:51,093 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927937364] [2021-06-05 23:21:51,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:21:51,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:21:51,402 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:21:51,402 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:21:51,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927937364] [2021-06-05 23:21:51,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927937364] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:21:51,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361867550] [2021-06-05 23:21:51,402 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:21:51,427 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:21:51,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:21:51,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 23:21:51,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:21:52,012 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:21:52,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1361867550] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:21:52,012 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:21:52,012 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 34 [2021-06-05 23:21:52,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822083057] [2021-06-05 23:21:52,012 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 23:21:52,013 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:21:52,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 23:21:52,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=1036, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 23:21:52,013 INFO L87 Difference]: Start difference. First operand 10888 states and 36352 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:21:54,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:21:54,190 INFO L93 Difference]: Finished difference Result 14122 states and 46166 transitions. [2021-06-05 23:21:54,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-05 23:21:54,191 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 23:21:54,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:21:54,210 INFO L225 Difference]: With dead ends: 14122 [2021-06-05 23:21:54,210 INFO L226 Difference]: Without dead ends: 14002 [2021-06-05 23:21:54,210 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 970 ImplicationChecksByTransitivity, 1829.8ms TimeCoverageRelationStatistics Valid=529, Invalid=3377, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 23:21:54,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14002 states. [2021-06-05 23:21:54,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14002 to 10950. [2021-06-05 23:21:54,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10950 states, 10949 states have (on average 3.3371084117270984) internal successors, (36538), 10949 states have internal predecessors, (36538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:21:54,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10950 states to 10950 states and 36538 transitions. [2021-06-05 23:21:54,375 INFO L78 Accepts]: Start accepts. Automaton has 10950 states and 36538 transitions. Word has length 36 [2021-06-05 23:21:54,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:21:54,375 INFO L482 AbstractCegarLoop]: Abstraction has 10950 states and 36538 transitions. [2021-06-05 23:21:54,375 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:21:54,375 INFO L276 IsEmpty]: Start isEmpty. Operand 10950 states and 36538 transitions. [2021-06-05 23:21:54,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 23:21:54,387 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:21:54,387 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:21:54,587 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1011 [2021-06-05 23:21:54,588 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:21:54,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:21:54,588 INFO L82 PathProgramCache]: Analyzing trace with hash -1389507819, now seen corresponding path program 129 times [2021-06-05 23:21:54,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:21:54,588 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773230955] [2021-06-05 23:21:54,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:21:54,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:21:54,819 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:21:54,819 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:21:54,819 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773230955] [2021-06-05 23:21:54,819 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [773230955] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:21:54,819 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309363014] [2021-06-05 23:21:54,819 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:21:54,846 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 23:21:54,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:21:54,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 23:21:54,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:21:55,366 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:21:55,367 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [309363014] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:21:55,367 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:21:55,367 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 35 [2021-06-05 23:21:55,367 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958463013] [2021-06-05 23:21:55,367 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 23:21:55,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:21:55,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 23:21:55,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=1091, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 23:21:55,367 INFO L87 Difference]: Start difference. First operand 10950 states and 36538 transitions. Second operand has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:21:57,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:21:57,823 INFO L93 Difference]: Finished difference Result 12361 states and 40393 transitions. [2021-06-05 23:21:57,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-05 23:21:57,823 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 23:21:57,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:21:57,839 INFO L225 Difference]: With dead ends: 12361 [2021-06-05 23:21:57,839 INFO L226 Difference]: Without dead ends: 12096 [2021-06-05 23:21:57,839 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1507 ImplicationChecksByTransitivity, 1973.2ms TimeCoverageRelationStatistics Valid=654, Invalid=4748, Unknown=0, NotChecked=0, Total=5402 [2021-06-05 23:21:57,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12096 states. [2021-06-05 23:21:57,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12096 to 10924. [2021-06-05 23:21:57,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10924 states, 10923 states have (on average 3.339924929048796) internal successors, (36482), 10923 states have internal predecessors, (36482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:21:58,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10924 states to 10924 states and 36482 transitions. [2021-06-05 23:21:58,000 INFO L78 Accepts]: Start accepts. Automaton has 10924 states and 36482 transitions. Word has length 36 [2021-06-05 23:21:58,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:21:58,000 INFO L482 AbstractCegarLoop]: Abstraction has 10924 states and 36482 transitions. [2021-06-05 23:21:58,000 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:21:58,000 INFO L276 IsEmpty]: Start isEmpty. Operand 10924 states and 36482 transitions. [2021-06-05 23:21:58,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 23:21:58,012 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:21:58,012 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:21:58,212 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1018 [2021-06-05 23:21:58,212 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:21:58,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:21:58,212 INFO L82 PathProgramCache]: Analyzing trace with hash -274730475, now seen corresponding path program 130 times [2021-06-05 23:21:58,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:21:58,213 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362972871] [2021-06-05 23:21:58,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:21:58,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:21:58,481 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:21:58,481 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:21:58,481 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362972871] [2021-06-05 23:21:58,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362972871] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:21:58,481 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75818019] [2021-06-05 23:21:58,481 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:21:58,504 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:21:58,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:21:58,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 23:21:58,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:21:59,094 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:21:59,094 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [75818019] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:21:59,094 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:21:59,094 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 38 [2021-06-05 23:21:59,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047617693] [2021-06-05 23:21:59,094 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 23:21:59,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:21:59,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 23:21:59,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=1280, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 23:21:59,095 INFO L87 Difference]: Start difference. First operand 10924 states and 36482 transitions. Second operand has 39 states, 39 states have (on average 1.794871794871795) internal successors, (70), 38 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:22:01,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:22:01,898 INFO L93 Difference]: Finished difference Result 16306 states and 52377 transitions. [2021-06-05 23:22:01,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-06-05 23:22:01,898 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.794871794871795) internal successors, (70), 38 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 23:22:01,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:22:01,920 INFO L225 Difference]: With dead ends: 16306 [2021-06-05 23:22:01,920 INFO L226 Difference]: Without dead ends: 16052 [2021-06-05 23:22:01,920 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2492 ImplicationChecksByTransitivity, 2492.2ms TimeCoverageRelationStatistics Valid=1101, Invalid=6909, Unknown=0, NotChecked=0, Total=8010 [2021-06-05 23:22:01,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16052 states. [2021-06-05 23:22:02,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16052 to 10922. [2021-06-05 23:22:02,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10922 states, 10921 states have (on average 3.3412691145499496) internal successors, (36490), 10921 states have internal predecessors, (36490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:22:02,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10922 states to 10922 states and 36490 transitions. [2021-06-05 23:22:02,098 INFO L78 Accepts]: Start accepts. Automaton has 10922 states and 36490 transitions. Word has length 36 [2021-06-05 23:22:02,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:22:02,098 INFO L482 AbstractCegarLoop]: Abstraction has 10922 states and 36490 transitions. [2021-06-05 23:22:02,098 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.794871794871795) internal successors, (70), 38 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:22:02,098 INFO L276 IsEmpty]: Start isEmpty. Operand 10922 states and 36490 transitions. [2021-06-05 23:22:02,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 23:22:02,110 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:22:02,110 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:22:02,310 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1022 [2021-06-05 23:22:02,310 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:22:02,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:22:02,311 INFO L82 PathProgramCache]: Analyzing trace with hash 28844817, now seen corresponding path program 131 times [2021-06-05 23:22:02,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:22:02,311 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760383763] [2021-06-05 23:22:02,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:22:02,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:22:02,578 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:22:02,578 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:22:02,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760383763] [2021-06-05 23:22:02,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760383763] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:22:02,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [578094517] [2021-06-05 23:22:02,578 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:22:02,604 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 23:22:02,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:22:02,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 23:22:02,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:22:03,203 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:22:03,203 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [578094517] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:22:03,203 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:22:03,203 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 38 [2021-06-05 23:22:03,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672573948] [2021-06-05 23:22:03,203 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 23:22:03,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:22:03,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 23:22:03,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=1281, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 23:22:03,203 INFO L87 Difference]: Start difference. First operand 10922 states and 36490 transitions. Second operand has 39 states, 39 states have (on average 1.794871794871795) internal successors, (70), 38 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:22:06,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:22:06,610 INFO L93 Difference]: Finished difference Result 17471 states and 55908 transitions. [2021-06-05 23:22:06,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2021-06-05 23:22:06,610 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.794871794871795) internal successors, (70), 38 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 23:22:06,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:22:06,631 INFO L225 Difference]: With dead ends: 17471 [2021-06-05 23:22:06,631 INFO L226 Difference]: Without dead ends: 17212 [2021-06-05 23:22:06,632 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3072 ImplicationChecksByTransitivity, 2853.2ms TimeCoverageRelationStatistics Valid=1320, Invalid=8382, Unknown=0, NotChecked=0, Total=9702 [2021-06-05 23:22:06,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17212 states. [2021-06-05 23:22:06,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17212 to 10990. [2021-06-05 23:22:06,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10990 states, 10989 states have (on average 3.3397033397033398) internal successors, (36700), 10989 states have internal predecessors, (36700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:22:06,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10990 states to 10990 states and 36700 transitions. [2021-06-05 23:22:06,814 INFO L78 Accepts]: Start accepts. Automaton has 10990 states and 36700 transitions. Word has length 36 [2021-06-05 23:22:06,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:22:06,814 INFO L482 AbstractCegarLoop]: Abstraction has 10990 states and 36700 transitions. [2021-06-05 23:22:06,815 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.794871794871795) internal successors, (70), 38 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:22:06,815 INFO L276 IsEmpty]: Start isEmpty. Operand 10990 states and 36700 transitions. [2021-06-05 23:22:06,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 23:22:06,826 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:22:06,826 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:22:07,027 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1026,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:22:07,027 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:22:07,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:22:07,027 INFO L82 PathProgramCache]: Analyzing trace with hash -2082175979, now seen corresponding path program 132 times [2021-06-05 23:22:07,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:22:07,027 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055127063] [2021-06-05 23:22:07,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:22:07,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:22:07,284 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:22:07,284 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:22:07,284 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055127063] [2021-06-05 23:22:07,284 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055127063] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:22:07,284 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1811078944] [2021-06-05 23:22:07,285 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:22:07,308 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 23:22:07,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:22:07,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 23:22:07,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:22:07,830 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:22:07,830 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1811078944] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:22:07,830 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:22:07,830 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 36 [2021-06-05 23:22:07,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993228853] [2021-06-05 23:22:07,830 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 23:22:07,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:22:07,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 23:22:07,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=229, Invalid=1103, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 23:22:07,831 INFO L87 Difference]: Start difference. First operand 10990 states and 36700 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:22:12,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:22:12,929 INFO L93 Difference]: Finished difference Result 19062 states and 60563 transitions. [2021-06-05 23:22:12,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2021-06-05 23:22:12,929 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 23:22:12,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:22:12,955 INFO L225 Difference]: With dead ends: 19062 [2021-06-05 23:22:12,955 INFO L226 Difference]: Without dead ends: 18879 [2021-06-05 23:22:12,956 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4132 ImplicationChecksByTransitivity, 3693.4ms TimeCoverageRelationStatistics Valid=1802, Invalid=10408, Unknown=0, NotChecked=0, Total=12210 [2021-06-05 23:22:12,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18879 states. [2021-06-05 23:22:13,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18879 to 10982. [2021-06-05 23:22:13,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10982 states, 10981 states have (on average 3.3392222930516344) internal successors, (36668), 10981 states have internal predecessors, (36668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:22:13,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10982 states to 10982 states and 36668 transitions. [2021-06-05 23:22:13,187 INFO L78 Accepts]: Start accepts. Automaton has 10982 states and 36668 transitions. Word has length 36 [2021-06-05 23:22:13,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:22:13,187 INFO L482 AbstractCegarLoop]: Abstraction has 10982 states and 36668 transitions. [2021-06-05 23:22:13,187 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:22:13,187 INFO L276 IsEmpty]: Start isEmpty. Operand 10982 states and 36668 transitions. [2021-06-05 23:22:13,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 23:22:13,199 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:22:13,199 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:22:13,399 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1028 [2021-06-05 23:22:13,399 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:22:13,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:22:13,400 INFO L82 PathProgramCache]: Analyzing trace with hash 1895461309, now seen corresponding path program 133 times [2021-06-05 23:22:13,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:22:13,400 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69984344] [2021-06-05 23:22:13,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:22:13,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:22:13,705 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:22:13,705 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:22:13,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69984344] [2021-06-05 23:22:13,705 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [69984344] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:22:13,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2146643725] [2021-06-05 23:22:13,705 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:22:13,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:22:13,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 23:22:13,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:22:14,368 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:22:14,368 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2146643725] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:22:14,369 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:22:14,369 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2021-06-05 23:22:14,369 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592072433] [2021-06-05 23:22:14,369 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 23:22:14,369 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:22:14,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 23:22:14,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=1155, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 23:22:14,369 INFO L87 Difference]: Start difference. First operand 10982 states and 36668 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:22:16,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:22:16,047 INFO L93 Difference]: Finished difference Result 14079 states and 46122 transitions. [2021-06-05 23:22:16,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 23:22:16,048 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 23:22:16,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:22:16,068 INFO L225 Difference]: With dead ends: 14079 [2021-06-05 23:22:16,068 INFO L226 Difference]: Without dead ends: 13998 [2021-06-05 23:22:16,068 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1038 ImplicationChecksByTransitivity, 1776.5ms TimeCoverageRelationStatistics Valid=581, Invalid=3451, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 23:22:16,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13998 states. [2021-06-05 23:22:16,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13998 to 11064. [2021-06-05 23:22:16,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11064 states, 11063 states have (on average 3.3388773388773387) internal successors, (36938), 11063 states have internal predecessors, (36938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:22:16,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11064 states to 11064 states and 36938 transitions. [2021-06-05 23:22:16,265 INFO L78 Accepts]: Start accepts. Automaton has 11064 states and 36938 transitions. Word has length 36 [2021-06-05 23:22:16,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:22:16,266 INFO L482 AbstractCegarLoop]: Abstraction has 11064 states and 36938 transitions. [2021-06-05 23:22:16,266 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:22:16,266 INFO L276 IsEmpty]: Start isEmpty. Operand 11064 states and 36938 transitions. [2021-06-05 23:22:16,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 23:22:16,278 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:22:16,278 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:22:16,478 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1032,133 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:22:16,478 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:22:16,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:22:16,479 INFO L82 PathProgramCache]: Analyzing trace with hash 1057534141, now seen corresponding path program 134 times [2021-06-05 23:22:16,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:22:16,479 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822255703] [2021-06-05 23:22:16,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:22:16,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:22:16,706 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:22:16,706 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:22:16,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822255703] [2021-06-05 23:22:16,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822255703] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:22:16,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [716785933] [2021-06-05 23:22:16,706 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:22:16,728 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:22:16,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:22:16,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 23:22:16,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:22:17,254 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:22:17,254 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [716785933] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:22:17,254 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:22:17,254 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 35 [2021-06-05 23:22:17,254 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795710460] [2021-06-05 23:22:17,254 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 23:22:17,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:22:17,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 23:22:17,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=1085, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 23:22:17,255 INFO L87 Difference]: Start difference. First operand 11064 states and 36938 transitions. Second operand has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:22:19,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:22:19,888 INFO L93 Difference]: Finished difference Result 12257 states and 40176 transitions. [2021-06-05 23:22:19,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-06-05 23:22:19,888 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 23:22:19,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:22:19,903 INFO L225 Difference]: With dead ends: 12257 [2021-06-05 23:22:19,904 INFO L226 Difference]: Without dead ends: 12020 [2021-06-05 23:22:19,904 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1614 ImplicationChecksByTransitivity, 2063.4ms TimeCoverageRelationStatistics Valid=707, Invalid=4993, Unknown=0, NotChecked=0, Total=5700 [2021-06-05 23:22:19,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12020 states. [2021-06-05 23:22:20,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12020 to 11036. [2021-06-05 23:22:20,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11036 states, 11035 states have (on average 3.3408246488445856) internal successors, (36866), 11035 states have internal predecessors, (36866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:22:20,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11036 states to 11036 states and 36866 transitions. [2021-06-05 23:22:20,061 INFO L78 Accepts]: Start accepts. Automaton has 11036 states and 36866 transitions. Word has length 36 [2021-06-05 23:22:20,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:22:20,061 INFO L482 AbstractCegarLoop]: Abstraction has 11036 states and 36866 transitions. [2021-06-05 23:22:20,061 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:22:20,061 INFO L276 IsEmpty]: Start isEmpty. Operand 11036 states and 36866 transitions. [2021-06-05 23:22:20,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 23:22:20,073 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:22:20,073 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:22:20,273 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1039 [2021-06-05 23:22:20,273 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:22:20,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:22:20,274 INFO L82 PathProgramCache]: Analyzing trace with hash 379472321, now seen corresponding path program 135 times [2021-06-05 23:22:20,274 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:22:20,274 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465819161] [2021-06-05 23:22:20,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:22:20,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:22:20,590 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:22:20,590 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:22:20,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465819161] [2021-06-05 23:22:20,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465819161] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:22:20,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570276529] [2021-06-05 23:22:20,590 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:22:20,613 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 23:22:20,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:22:20,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 23:22:20,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:22:21,185 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:22:21,185 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1570276529] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:22:21,185 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:22:21,186 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 34 [2021-06-05 23:22:21,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336951081] [2021-06-05 23:22:21,186 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 23:22:21,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:22:21,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 23:22:21,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=1003, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 23:22:21,186 INFO L87 Difference]: Start difference. First operand 11036 states and 36866 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:22:24,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:22:24,477 INFO L93 Difference]: Finished difference Result 17161 states and 55605 transitions. [2021-06-05 23:22:24,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-06-05 23:22:24,477 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 23:22:24,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:22:24,501 INFO L225 Difference]: With dead ends: 17161 [2021-06-05 23:22:24,501 INFO L226 Difference]: Without dead ends: 17047 [2021-06-05 23:22:24,502 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1991 ImplicationChecksByTransitivity, 2757.2ms TimeCoverageRelationStatistics Valid=959, Invalid=5361, Unknown=0, NotChecked=0, Total=6320 [2021-06-05 23:22:24,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17047 states. [2021-06-05 23:22:24,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17047 to 11054. [2021-06-05 23:22:24,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11054 states, 11053 states have (on average 3.3429838053017282) internal successors, (36950), 11053 states have internal predecessors, (36950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:22:24,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11054 states to 11054 states and 36950 transitions. [2021-06-05 23:22:24,693 INFO L78 Accepts]: Start accepts. Automaton has 11054 states and 36950 transitions. Word has length 36 [2021-06-05 23:22:24,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:22:24,693 INFO L482 AbstractCegarLoop]: Abstraction has 11054 states and 36950 transitions. [2021-06-05 23:22:24,693 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:22:24,693 INFO L276 IsEmpty]: Start isEmpty. Operand 11054 states and 36950 transitions. [2021-06-05 23:22:24,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 23:22:24,707 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:22:24,707 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:22:24,907 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1043,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:22:24,907 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:22:24,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:22:24,907 INFO L82 PathProgramCache]: Analyzing trace with hash -2017581567, now seen corresponding path program 136 times [2021-06-05 23:22:24,907 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:22:24,907 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685939910] [2021-06-05 23:22:24,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:22:24,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:22:25,264 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:22:25,265 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:22:25,265 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685939910] [2021-06-05 23:22:25,265 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685939910] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:22:25,265 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [369537444] [2021-06-05 23:22:25,265 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:22:25,287 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:22:25,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:22:25,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 23:22:25,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:22:25,958 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:22:25,959 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [369537444] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:22:25,959 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:22:25,959 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 35 [2021-06-05 23:22:25,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938585911] [2021-06-05 23:22:25,959 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 23:22:25,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:22:25,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 23:22:25,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=1060, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 23:22:25,959 INFO L87 Difference]: Start difference. First operand 11054 states and 36950 transitions. Second operand has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:22:28,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:22:28,769 INFO L93 Difference]: Finished difference Result 20331 states and 65982 transitions. [2021-06-05 23:22:28,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-06-05 23:22:28,770 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 23:22:28,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:22:28,799 INFO L225 Difference]: With dead ends: 20331 [2021-06-05 23:22:28,799 INFO L226 Difference]: Without dead ends: 20211 [2021-06-05 23:22:28,800 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1853 ImplicationChecksByTransitivity, 2649.2ms TimeCoverageRelationStatistics Valid=1048, Invalid=4958, Unknown=0, NotChecked=0, Total=6006 [2021-06-05 23:22:28,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20211 states. [2021-06-05 23:22:29,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20211 to 11068. [2021-06-05 23:22:29,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11068 states, 11067 states have (on average 3.3430017168157584) internal successors, (36997), 11067 states have internal predecessors, (36997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:22:29,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11068 states to 11068 states and 36997 transitions. [2021-06-05 23:22:29,031 INFO L78 Accepts]: Start accepts. Automaton has 11068 states and 36997 transitions. Word has length 36 [2021-06-05 23:22:29,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:22:29,031 INFO L482 AbstractCegarLoop]: Abstraction has 11068 states and 36997 transitions. [2021-06-05 23:22:29,031 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:22:29,031 INFO L276 IsEmpty]: Start isEmpty. Operand 11068 states and 36997 transitions. [2021-06-05 23:22:29,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 23:22:29,043 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:22:29,043 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:22:29,243 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1050 [2021-06-05 23:22:29,244 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:22:29,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:22:29,244 INFO L82 PathProgramCache]: Analyzing trace with hash -1292544127, now seen corresponding path program 137 times [2021-06-05 23:22:29,244 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:22:29,244 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376920332] [2021-06-05 23:22:29,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:22:29,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:22:29,523 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:22:29,523 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:22:29,523 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376920332] [2021-06-05 23:22:29,523 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376920332] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:22:29,523 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [916018251] [2021-06-05 23:22:29,523 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:22:29,546 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 23:22:29,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:22:29,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 23:22:29,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:22:30,085 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:22:30,085 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [916018251] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:22:30,085 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:22:30,085 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-06-05 23:22:30,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795945976] [2021-06-05 23:22:30,086 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 23:22:30,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:22:30,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 23:22:30,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=1002, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 23:22:30,086 INFO L87 Difference]: Start difference. First operand 11068 states and 36997 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:22:31,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:22:31,537 INFO L93 Difference]: Finished difference Result 14897 states and 49054 transitions. [2021-06-05 23:22:31,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 23:22:31,537 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 23:22:31,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:22:31,559 INFO L225 Difference]: With dead ends: 14897 [2021-06-05 23:22:31,559 INFO L226 Difference]: Without dead ends: 14817 [2021-06-05 23:22:31,560 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 675 ImplicationChecksByTransitivity, 1304.1ms TimeCoverageRelationStatistics Valid=456, Invalid=2094, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 23:22:31,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14817 states. [2021-06-05 23:22:31,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14817 to 11064. [2021-06-05 23:22:31,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11064 states, 11063 states have (on average 3.343125734430082) internal successors, (36985), 11063 states have internal predecessors, (36985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:22:31,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11064 states to 11064 states and 36985 transitions. [2021-06-05 23:22:31,794 INFO L78 Accepts]: Start accepts. Automaton has 11064 states and 36985 transitions. Word has length 36 [2021-06-05 23:22:31,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:22:31,794 INFO L482 AbstractCegarLoop]: Abstraction has 11064 states and 36985 transitions. [2021-06-05 23:22:31,794 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:22:31,794 INFO L276 IsEmpty]: Start isEmpty. Operand 11064 states and 36985 transitions. [2021-06-05 23:22:31,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 23:22:31,805 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:22:31,805 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:22:32,005 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 137 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1057 [2021-06-05 23:22:32,005 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:22:32,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:22:32,006 INFO L82 PathProgramCache]: Analyzing trace with hash 1429501845, now seen corresponding path program 138 times [2021-06-05 23:22:32,006 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:22:32,006 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143678537] [2021-06-05 23:22:32,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:22:32,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:22:32,220 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:22:32,221 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:22:32,221 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143678537] [2021-06-05 23:22:32,221 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143678537] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:22:32,221 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889848753] [2021-06-05 23:22:32,221 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:22:32,244 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 23:22:32,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:22:32,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 23:22:32,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:22:32,736 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:22:32,736 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1889848753] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:22:32,736 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:22:32,736 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 35 [2021-06-05 23:22:32,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083746013] [2021-06-05 23:22:32,736 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 23:22:32,736 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:22:32,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 23:22:32,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=1076, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 23:22:32,737 INFO L87 Difference]: Start difference. First operand 11064 states and 36985 transitions. Second operand has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:22:35,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:22:35,389 INFO L93 Difference]: Finished difference Result 13454 states and 43876 transitions. [2021-06-05 23:22:35,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-06-05 23:22:35,389 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 23:22:35,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:22:35,407 INFO L225 Difference]: With dead ends: 13454 [2021-06-05 23:22:35,407 INFO L226 Difference]: Without dead ends: 13139 [2021-06-05 23:22:35,407 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1569 ImplicationChecksByTransitivity, 1950.1ms TimeCoverageRelationStatistics Valid=770, Invalid=4780, Unknown=0, NotChecked=0, Total=5550 [2021-06-05 23:22:35,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13139 states. [2021-06-05 23:22:35,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13139 to 11133. [2021-06-05 23:22:35,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11133 states, 11132 states have (on average 3.3459396334890408) internal successors, (37247), 11132 states have internal predecessors, (37247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:22:35,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11133 states to 11133 states and 37247 transitions. [2021-06-05 23:22:35,578 INFO L78 Accepts]: Start accepts. Automaton has 11133 states and 37247 transitions. Word has length 36 [2021-06-05 23:22:35,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:22:35,578 INFO L482 AbstractCegarLoop]: Abstraction has 11133 states and 37247 transitions. [2021-06-05 23:22:35,579 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:22:35,579 INFO L276 IsEmpty]: Start isEmpty. Operand 11133 states and 37247 transitions. [2021-06-05 23:22:35,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 23:22:35,590 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:22:35,591 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:22:35,791 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1061 [2021-06-05 23:22:35,791 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:22:35,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:22:35,791 INFO L82 PathProgramCache]: Analyzing trace with hash -733373887, now seen corresponding path program 139 times [2021-06-05 23:22:35,791 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:22:35,791 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39195822] [2021-06-05 23:22:35,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:22:35,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:22:36,013 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:22:36,013 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:22:36,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39195822] [2021-06-05 23:22:36,013 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39195822] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:22:36,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [887846734] [2021-06-05 23:22:36,013 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 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:22:36,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:22:36,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 23:22:36,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:22:36,546 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:22:36,546 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [887846734] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:22:36,546 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:22:36,546 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2021-06-05 23:22:36,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021252321] [2021-06-05 23:22:36,546 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 23:22:36,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:22:36,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 23:22:36,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=1116, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 23:22:36,547 INFO L87 Difference]: Start difference. First operand 11133 states and 37247 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:22:38,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:22:38,776 INFO L93 Difference]: Finished difference Result 16080 states and 51932 transitions. [2021-06-05 23:22:38,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-05 23:22:38,777 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 23:22:38,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:22:38,797 INFO L225 Difference]: With dead ends: 16080 [2021-06-05 23:22:38,798 INFO L226 Difference]: Without dead ends: 15916 [2021-06-05 23:22:38,798 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1597 ImplicationChecksByTransitivity, 1927.0ms TimeCoverageRelationStatistics Valid=890, Invalid=4366, Unknown=0, NotChecked=0, Total=5256 [2021-06-05 23:22:38,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15916 states. [2021-06-05 23:22:38,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15916 to 11125. [2021-06-05 23:22:38,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11125 states, 11124 states have (on average 3.344750089895721) internal successors, (37207), 11124 states have internal predecessors, (37207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:22:38,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11125 states to 11125 states and 37207 transitions. [2021-06-05 23:22:38,982 INFO L78 Accepts]: Start accepts. Automaton has 11125 states and 37207 transitions. Word has length 36 [2021-06-05 23:22:38,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:22:38,982 INFO L482 AbstractCegarLoop]: Abstraction has 11125 states and 37207 transitions. [2021-06-05 23:22:38,982 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:22:38,982 INFO L276 IsEmpty]: Start isEmpty. Operand 11125 states and 37207 transitions. [2021-06-05 23:22:38,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 23:22:38,994 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:22:38,994 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:22:39,194 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1065,139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:22:39,195 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:22:39,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:22:39,195 INFO L82 PathProgramCache]: Analyzing trace with hash 188328253, now seen corresponding path program 140 times [2021-06-05 23:22:39,195 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:22:39,195 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486860375] [2021-06-05 23:22:39,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:22:39,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:22:39,419 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:22:39,419 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:22:39,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486860375] [2021-06-05 23:22:39,419 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [486860375] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:22:39,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [410108928] [2021-06-05 23:22:39,419 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:22:39,441 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:22:39,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:22:39,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 23:22:39,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:22:39,926 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:22:39,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [410108928] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:22:39,927 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:22:39,927 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 35 [2021-06-05 23:22:39,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126652726] [2021-06-05 23:22:39,927 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 23:22:39,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:22:39,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 23:22:39,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=220, Invalid=1040, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 23:22:39,927 INFO L87 Difference]: Start difference. First operand 11125 states and 37207 transitions. Second operand has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:22:42,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:22:42,384 INFO L93 Difference]: Finished difference Result 16618 states and 53652 transitions. [2021-06-05 23:22:42,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-06-05 23:22:42,384 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 23:22:42,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:22:42,406 INFO L225 Difference]: With dead ends: 16618 [2021-06-05 23:22:42,407 INFO L226 Difference]: Without dead ends: 16422 [2021-06-05 23:22:42,407 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1691 ImplicationChecksByTransitivity, 2109.6ms TimeCoverageRelationStatistics Valid=1010, Invalid=4540, Unknown=0, NotChecked=0, Total=5550 [2021-06-05 23:22:42,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16422 states. [2021-06-05 23:22:42,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16422 to 11054. [2021-06-05 23:22:42,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11054 states, 11053 states have (on average 3.3440694833981723) internal successors, (36962), 11053 states have internal predecessors, (36962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:22:42,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11054 states to 11054 states and 36962 transitions. [2021-06-05 23:22:42,600 INFO L78 Accepts]: Start accepts. Automaton has 11054 states and 36962 transitions. Word has length 36 [2021-06-05 23:22:42,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:22:42,600 INFO L482 AbstractCegarLoop]: Abstraction has 11054 states and 36962 transitions. [2021-06-05 23:22:42,600 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:22:42,600 INFO L276 IsEmpty]: Start isEmpty. Operand 11054 states and 36962 transitions. [2021-06-05 23:22:42,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 23:22:42,612 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:22:42,612 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:22:42,812 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1069 [2021-06-05 23:22:42,812 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:22:42,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:22:42,812 INFO L82 PathProgramCache]: Analyzing trace with hash -1162010563, now seen corresponding path program 141 times [2021-06-05 23:22:42,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:22:42,813 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331267810] [2021-06-05 23:22:42,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:22:42,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:22:43,021 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:22:43,021 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:22:43,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331267810] [2021-06-05 23:22:43,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331267810] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:22:43,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209547631] [2021-06-05 23:22:43,022 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:22:43,044 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 23:22:43,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:22:43,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 23:22:43,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:22:43,525 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:22:43,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [209547631] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:22:43,525 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:22:43,525 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 33 [2021-06-05 23:22:43,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064659876] [2021-06-05 23:22:43,525 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 23:22:43,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:22:43,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 23:22:43,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=946, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 23:22:43,526 INFO L87 Difference]: Start difference. First operand 11054 states and 36962 transitions. Second operand has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:22:44,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:22:44,929 INFO L93 Difference]: Finished difference Result 16893 states and 55491 transitions. [2021-06-05 23:22:44,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 23:22:44,929 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 23:22:44,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:22:44,953 INFO L225 Difference]: With dead ends: 16893 [2021-06-05 23:22:44,953 INFO L226 Difference]: Without dead ends: 16813 [2021-06-05 23:22:44,953 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 670 ImplicationChecksByTransitivity, 1195.0ms TimeCoverageRelationStatistics Valid=499, Invalid=2257, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 23:22:44,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16813 states. [2021-06-05 23:22:45,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16813 to 11018. [2021-06-05 23:22:45,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11018 states, 11017 states have (on average 3.3433784151765455) internal successors, (36834), 11017 states have internal predecessors, (36834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:22:45,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11018 states to 11018 states and 36834 transitions. [2021-06-05 23:22:45,159 INFO L78 Accepts]: Start accepts. Automaton has 11018 states and 36834 transitions. Word has length 36 [2021-06-05 23:22:45,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:22:45,159 INFO L482 AbstractCegarLoop]: Abstraction has 11018 states and 36834 transitions. [2021-06-05 23:22:45,159 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:22:45,159 INFO L276 IsEmpty]: Start isEmpty. Operand 11018 states and 36834 transitions. [2021-06-05 23:22:45,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 23:22:45,171 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:22:45,171 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:22:45,371 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1073,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:22:45,371 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:22:45,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:22:45,371 INFO L82 PathProgramCache]: Analyzing trace with hash -1207331367, now seen corresponding path program 142 times [2021-06-05 23:22:45,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:22:45,372 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594973638] [2021-06-05 23:22:45,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:22:45,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:22:45,647 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:22:45,647 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:22:45,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594973638] [2021-06-05 23:22:45,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594973638] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:22:45,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467999150] [2021-06-05 23:22:45,647 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:22:45,669 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:22:45,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:22:45,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 23:22:45,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:22:46,168 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:22:46,168 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1467999150] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:22:46,168 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:22:46,169 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-06-05 23:22:46,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915100183] [2021-06-05 23:22:46,169 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 23:22:46,169 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:22:46,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 23:22:46,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=1033, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 23:22:46,169 INFO L87 Difference]: Start difference. First operand 11018 states and 36834 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:22:47,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:22:47,377 INFO L93 Difference]: Finished difference Result 12507 states and 41160 transitions. [2021-06-05 23:22:47,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 23:22:47,378 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 23:22:47,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:22:47,397 INFO L225 Difference]: With dead ends: 12507 [2021-06-05 23:22:47,397 INFO L226 Difference]: Without dead ends: 12342 [2021-06-05 23:22:47,398 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 659 ImplicationChecksByTransitivity, 1244.5ms TimeCoverageRelationStatistics Valid=405, Invalid=2457, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 23:22:47,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12342 states. [2021-06-05 23:22:47,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12342 to 10992. [2021-06-05 23:22:47,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10992 states, 10991 states have (on average 3.34400873441907) internal successors, (36754), 10991 states have internal predecessors, (36754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:22:47,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10992 states to 10992 states and 36754 transitions. [2021-06-05 23:22:47,605 INFO L78 Accepts]: Start accepts. Automaton has 10992 states and 36754 transitions. Word has length 36 [2021-06-05 23:22:47,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:22:47,605 INFO L482 AbstractCegarLoop]: Abstraction has 10992 states and 36754 transitions. [2021-06-05 23:22:47,605 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:22:47,605 INFO L276 IsEmpty]: Start isEmpty. Operand 10992 states and 36754 transitions. [2021-06-05 23:22:47,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 23:22:47,617 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:22:47,617 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:22:47,817 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1087,142 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:22:47,818 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:22:47,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:22:47,818 INFO L82 PathProgramCache]: Analyzing trace with hash -255059011, now seen corresponding path program 143 times [2021-06-05 23:22:47,818 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:22:47,818 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580709388] [2021-06-05 23:22:47,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:22:47,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:22:48,029 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:22:48,029 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:22:48,029 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580709388] [2021-06-05 23:22:48,029 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580709388] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:22:48,029 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [283447938] [2021-06-05 23:22:48,029 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:22:48,052 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 23:22:48,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:22:48,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 23:22:48,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:22:48,574 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:22:48,575 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [283447938] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:22:48,575 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:22:48,575 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-06-05 23:22:48,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307895615] [2021-06-05 23:22:48,575 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 23:22:48,575 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:22:48,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 23:22:48,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=1008, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 23:22:48,575 INFO L87 Difference]: Start difference. First operand 10992 states and 36754 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:22:50,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:22:50,305 INFO L93 Difference]: Finished difference Result 18579 states and 60781 transitions. [2021-06-05 23:22:50,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 23:22:50,305 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 23:22:50,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:22:50,333 INFO L225 Difference]: With dead ends: 18579 [2021-06-05 23:22:50,334 INFO L226 Difference]: Without dead ends: 18499 [2021-06-05 23:22:50,334 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 719 ImplicationChecksByTransitivity, 1235.7ms TimeCoverageRelationStatistics Valid=531, Invalid=2549, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 23:22:50,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18499 states. [2021-06-05 23:22:50,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18499 to 11116. [2021-06-05 23:22:50,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11116 states, 11115 states have (on average 3.343229869545659) internal successors, (37160), 11115 states have internal predecessors, (37160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:22:50,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11116 states to 11116 states and 37160 transitions. [2021-06-05 23:22:50,593 INFO L78 Accepts]: Start accepts. Automaton has 11116 states and 37160 transitions. Word has length 36 [2021-06-05 23:22:50,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:22:50,593 INFO L482 AbstractCegarLoop]: Abstraction has 11116 states and 37160 transitions. [2021-06-05 23:22:50,593 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:22:50,593 INFO L276 IsEmpty]: Start isEmpty. Operand 11116 states and 37160 transitions. [2021-06-05 23:22:50,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 23:22:50,605 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:22:50,606 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:22:50,806 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1092 [2021-06-05 23:22:50,806 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:22:50,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:22:50,806 INFO L82 PathProgramCache]: Analyzing trace with hash -642214895, now seen corresponding path program 144 times [2021-06-05 23:22:50,806 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:22:50,806 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961791844] [2021-06-05 23:22:50,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:22:50,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:22:51,024 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:22:51,024 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:22:51,024 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961791844] [2021-06-05 23:22:51,024 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961791844] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:22:51,024 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1365990218] [2021-06-05 23:22:51,024 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:22:51,047 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 23:22:51,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:22:51,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 23:22:51,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:22:51,563 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:22:51,563 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1365990218] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:22:51,563 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:22:51,563 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 33 [2021-06-05 23:22:51,563 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427220938] [2021-06-05 23:22:51,563 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 23:22:51,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:22:51,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 23:22:51,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=954, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 23:22:51,564 INFO L87 Difference]: Start difference. First operand 11116 states and 37160 transitions. Second operand has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:22:53,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:22:53,551 INFO L93 Difference]: Finished difference Result 19105 states and 62540 transitions. [2021-06-05 23:22:53,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-05 23:22:53,552 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 23:22:53,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:22:53,576 INFO L225 Difference]: With dead ends: 19105 [2021-06-05 23:22:53,576 INFO L226 Difference]: Without dead ends: 19025 [2021-06-05 23:22:53,577 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1071 ImplicationChecksByTransitivity, 1627.3ms TimeCoverageRelationStatistics Valid=701, Invalid=3589, Unknown=0, NotChecked=0, Total=4290 [2021-06-05 23:22:53,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19025 states. [2021-06-05 23:22:53,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19025 to 11194. [2021-06-05 23:22:53,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11194 states, 11193 states have (on average 3.343696953453051) internal successors, (37426), 11193 states have internal predecessors, (37426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:22:53,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11194 states to 11194 states and 37426 transitions. [2021-06-05 23:22:53,776 INFO L78 Accepts]: Start accepts. Automaton has 11194 states and 37426 transitions. Word has length 36 [2021-06-05 23:22:53,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:22:53,776 INFO L482 AbstractCegarLoop]: Abstraction has 11194 states and 37426 transitions. [2021-06-05 23:22:53,776 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:22:53,777 INFO L276 IsEmpty]: Start isEmpty. Operand 11194 states and 37426 transitions. [2021-06-05 23:22:53,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 23:22:53,788 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:22:53,788 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:22:53,996 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1106,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:22:53,997 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:22:53,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:22:54,000 INFO L82 PathProgramCache]: Analyzing trace with hash 441740049, now seen corresponding path program 145 times [2021-06-05 23:22:54,000 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:22:54,000 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59770685] [2021-06-05 23:22:54,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:22:54,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:22:54,256 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:22:54,256 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:22:54,256 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59770685] [2021-06-05 23:22:54,256 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [59770685] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:22:54,256 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639749074] [2021-06-05 23:22:54,256 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 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:22:54,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:22:54,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 23:22:54,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:22:54,964 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:22:54,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1639749074] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:22:54,964 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:22:54,964 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 35 [2021-06-05 23:22:54,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949977646] [2021-06-05 23:22:54,965 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 23:22:54,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:22:54,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 23:22:54,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=1051, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 23:22:54,965 INFO L87 Difference]: Start difference. First operand 11194 states and 37426 transitions. Second operand has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:22:57,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:22:57,788 INFO L93 Difference]: Finished difference Result 21615 states and 69306 transitions. [2021-06-05 23:22:57,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-05 23:22:57,789 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 23:22:57,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:22:57,820 INFO L225 Difference]: With dead ends: 21615 [2021-06-05 23:22:57,821 INFO L226 Difference]: Without dead ends: 21495 [2021-06-05 23:22:57,821 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1739 ImplicationChecksByTransitivity, 2339.3ms TimeCoverageRelationStatistics Valid=1062, Invalid=4638, Unknown=0, NotChecked=0, Total=5700 [2021-06-05 23:22:57,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21495 states. [2021-06-05 23:22:58,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21495 to 11242. [2021-06-05 23:22:58,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11242 states, 11241 states have (on average 3.34489814073481) internal successors, (37600), 11241 states have internal predecessors, (37600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:22:58,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11242 states to 11242 states and 37600 transitions. [2021-06-05 23:22:58,062 INFO L78 Accepts]: Start accepts. Automaton has 11242 states and 37600 transitions. Word has length 36 [2021-06-05 23:22:58,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:22:58,062 INFO L482 AbstractCegarLoop]: Abstraction has 11242 states and 37600 transitions. [2021-06-05 23:22:58,062 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:22:58,062 INFO L276 IsEmpty]: Start isEmpty. Operand 11242 states and 37600 transitions. [2021-06-05 23:22:58,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 23:22:58,075 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:22:58,075 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:22:58,275 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1120,145 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:22:58,276 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:22:58,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:22:58,276 INFO L82 PathProgramCache]: Analyzing trace with hash -1852934099, now seen corresponding path program 146 times [2021-06-05 23:22:58,276 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:22:58,276 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232740621] [2021-06-05 23:22:58,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:22:58,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:22:58,537 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:22:58,537 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:22:58,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232740621] [2021-06-05 23:22:58,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232740621] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:22:58,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1945567229] [2021-06-05 23:22:58,538 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:22:58,560 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:22:58,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:22:58,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 23:22:58,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:22:59,211 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:22:59,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1945567229] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:22:59,211 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:22:59,211 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 34 [2021-06-05 23:22:59,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706820749] [2021-06-05 23:22:59,211 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 23:22:59,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:22:59,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 23:22:59,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=980, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 23:22:59,212 INFO L87 Difference]: Start difference. First operand 11242 states and 37600 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:23:01,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:23:01,761 INFO L93 Difference]: Finished difference Result 21465 states and 69086 transitions. [2021-06-05 23:23:01,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-06-05 23:23:01,761 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 23:23:01,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:23:01,791 INFO L225 Difference]: With dead ends: 21465 [2021-06-05 23:23:01,792 INFO L226 Difference]: Without dead ends: 21345 [2021-06-05 23:23:01,792 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1708 ImplicationChecksByTransitivity, 2312.5ms TimeCoverageRelationStatistics Valid=1042, Invalid=4360, Unknown=0, NotChecked=0, Total=5402 [2021-06-05 23:23:01,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21345 states. [2021-06-05 23:23:01,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21345 to 11262. [2021-06-05 23:23:02,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11262 states, 11261 states have (on average 3.3419767338602258) internal successors, (37634), 11261 states have internal predecessors, (37634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:23:02,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11262 states to 11262 states and 37634 transitions. [2021-06-05 23:23:02,028 INFO L78 Accepts]: Start accepts. Automaton has 11262 states and 37634 transitions. Word has length 36 [2021-06-05 23:23:02,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:23:02,028 INFO L482 AbstractCegarLoop]: Abstraction has 11262 states and 37634 transitions. [2021-06-05 23:23:02,028 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:23:02,028 INFO L276 IsEmpty]: Start isEmpty. Operand 11262 states and 37634 transitions. [2021-06-05 23:23:02,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 23:23:02,040 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:23:02,040 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:23:02,240 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1129,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:23:02,240 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:23:02,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:23:02,241 INFO L82 PathProgramCache]: Analyzing trace with hash -1979488763, now seen corresponding path program 147 times [2021-06-05 23:23:02,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:23:02,241 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491369525] [2021-06-05 23:23:02,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:23:02,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:23:02,475 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:23:02,475 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:23:02,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491369525] [2021-06-05 23:23:02,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491369525] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:23:02,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [940255005] [2021-06-05 23:23:02,475 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 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:23:02,498 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 23:23:02,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:23:02,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 23:23:02,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:23:03,149 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:23:03,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [940255005] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:23:03,150 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:23:03,150 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 33 [2021-06-05 23:23:03,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171925046] [2021-06-05 23:23:03,150 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 23:23:03,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:23:03,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 23:23:03,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=960, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 23:23:03,150 INFO L87 Difference]: Start difference. First operand 11262 states and 37634 transitions. Second operand has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:23:05,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:23:05,476 INFO L93 Difference]: Finished difference Result 17308 states and 56811 transitions. [2021-06-05 23:23:05,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-06-05 23:23:05,476 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 23:23:05,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:23:05,503 INFO L225 Difference]: With dead ends: 17308 [2021-06-05 23:23:05,503 INFO L226 Difference]: Without dead ends: 17194 [2021-06-05 23:23:05,504 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1289 ImplicationChecksByTransitivity, 2101.4ms TimeCoverageRelationStatistics Valid=676, Invalid=3880, Unknown=0, NotChecked=0, Total=4556 [2021-06-05 23:23:05,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17194 states. [2021-06-05 23:23:05,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17194 to 11338. [2021-06-05 23:23:05,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11338 states, 11337 states have (on average 3.3419775954838142) internal successors, (37888), 11337 states have internal predecessors, (37888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:23:05,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11338 states to 11338 states and 37888 transitions. [2021-06-05 23:23:05,696 INFO L78 Accepts]: Start accepts. Automaton has 11338 states and 37888 transitions. Word has length 36 [2021-06-05 23:23:05,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:23:05,697 INFO L482 AbstractCegarLoop]: Abstraction has 11338 states and 37888 transitions. [2021-06-05 23:23:05,697 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:23:05,697 INFO L276 IsEmpty]: Start isEmpty. Operand 11338 states and 37888 transitions. [2021-06-05 23:23:05,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 23:23:05,709 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:23:05,709 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:23:05,909 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1141,147 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:23:05,909 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:23:05,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:23:05,909 INFO L82 PathProgramCache]: Analyzing trace with hash -1127896659, now seen corresponding path program 148 times [2021-06-05 23:23:05,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:23:05,910 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889014263] [2021-06-05 23:23:05,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:23:05,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:23:06,151 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:23:06,151 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:23:06,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889014263] [2021-06-05 23:23:06,152 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889014263] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:23:06,152 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1085831891] [2021-06-05 23:23:06,152 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 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:23:06,175 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:23:06,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:23:06,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 23:23:06,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:23:06,830 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:23:06,830 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1085831891] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:23:06,830 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:23:06,830 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-06-05 23:23:06,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273279292] [2021-06-05 23:23:06,830 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 23:23:06,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:23:06,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 23:23:06,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=1001, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 23:23:06,831 INFO L87 Difference]: Start difference. First operand 11338 states and 37888 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:23:08,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:23:08,565 INFO L93 Difference]: Finished difference Result 19945 states and 65481 transitions. [2021-06-05 23:23:08,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 23:23:08,565 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 23:23:08,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:23:08,595 INFO L225 Difference]: With dead ends: 19945 [2021-06-05 23:23:08,595 INFO L226 Difference]: Without dead ends: 19825 [2021-06-05 23:23:08,595 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 917 ImplicationChecksByTransitivity, 1624.0ms TimeCoverageRelationStatistics Valid=568, Invalid=2738, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 23:23:08,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19825 states. [2021-06-05 23:23:08,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19825 to 11340. [2021-06-05 23:23:08,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11340 states, 11339 states have (on average 3.34191727665579) internal successors, (37894), 11339 states have internal predecessors, (37894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:23:08,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11340 states to 11340 states and 37894 transitions. [2021-06-05 23:23:08,817 INFO L78 Accepts]: Start accepts. Automaton has 11340 states and 37894 transitions. Word has length 36 [2021-06-05 23:23:08,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:23:08,817 INFO L482 AbstractCegarLoop]: Abstraction has 11340 states and 37894 transitions. [2021-06-05 23:23:08,817 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:23:08,817 INFO L276 IsEmpty]: Start isEmpty. Operand 11340 states and 37894 transitions. [2021-06-05 23:23:08,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 23:23:08,829 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:23:08,829 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:23:09,030 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1150,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:23:09,030 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:23:09,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:23:09,030 INFO L82 PathProgramCache]: Analyzing trace with hash -1708324419, now seen corresponding path program 149 times [2021-06-05 23:23:09,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:23:09,030 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388895349] [2021-06-05 23:23:09,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:23:09,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:23:09,276 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:23:09,276 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:23:09,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388895349] [2021-06-05 23:23:09,277 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388895349] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:23:09,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669735084] [2021-06-05 23:23:09,277 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 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:23:09,302 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 23:23:09,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:23:09,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 23:23:09,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:23:10,021 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:23:10,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [669735084] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:23:10,022 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:23:10,022 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2021-06-05 23:23:10,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904446454] [2021-06-05 23:23:10,022 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 23:23:10,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:23:10,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 23:23:10,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=1139, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 23:23:10,022 INFO L87 Difference]: Start difference. First operand 11340 states and 37894 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:23:11,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:23:11,835 INFO L93 Difference]: Finished difference Result 17123 states and 55717 transitions. [2021-06-05 23:23:11,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-05 23:23:11,836 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 23:23:11,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:23:11,859 INFO L225 Difference]: With dead ends: 17123 [2021-06-05 23:23:11,859 INFO L226 Difference]: Without dead ends: 17028 [2021-06-05 23:23:11,859 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 977 ImplicationChecksByTransitivity, 1696.1ms TimeCoverageRelationStatistics Valid=569, Invalid=3213, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 23:23:11,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17028 states. [2021-06-05 23:23:12,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17028 to 11434. [2021-06-05 23:23:12,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11434 states, 11433 states have (on average 3.3427796728767603) internal successors, (38218), 11433 states have internal predecessors, (38218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:23:12,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11434 states to 11434 states and 38218 transitions. [2021-06-05 23:23:12,049 INFO L78 Accepts]: Start accepts. Automaton has 11434 states and 38218 transitions. Word has length 36 [2021-06-05 23:23:12,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:23:12,049 INFO L482 AbstractCegarLoop]: Abstraction has 11434 states and 38218 transitions. [2021-06-05 23:23:12,049 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:23:12,050 INFO L276 IsEmpty]: Start isEmpty. Operand 11434 states and 38218 transitions. [2021-06-05 23:23:12,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 23:23:12,062 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:23:12,062 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:23:12,262 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1159 [2021-06-05 23:23:12,262 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:23:12,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:23:12,262 INFO L82 PathProgramCache]: Analyzing trace with hash -990756419, now seen corresponding path program 150 times [2021-06-05 23:23:12,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:23:12,263 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152203218] [2021-06-05 23:23:12,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:23:12,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:23:12,517 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:23:12,517 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:23:12,517 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152203218] [2021-06-05 23:23:12,517 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152203218] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:23:12,517 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546040682] [2021-06-05 23:23:12,517 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:23:12,540 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 23:23:12,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:23:12,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 23:23:12,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:23:13,192 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:23:13,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1546040682] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:23:13,192 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:23:13,192 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 34 [2021-06-05 23:23:13,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095565281] [2021-06-05 23:23:13,192 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 23:23:13,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:23:13,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 23:23:13,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=981, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 23:23:13,193 INFO L87 Difference]: Start difference. First operand 11434 states and 38218 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:23:15,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:23:15,705 INFO L93 Difference]: Finished difference Result 21041 states and 67818 transitions. [2021-06-05 23:23:15,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-05 23:23:15,705 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 23:23:15,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:23:15,733 INFO L225 Difference]: With dead ends: 21041 [2021-06-05 23:23:15,733 INFO L226 Difference]: Without dead ends: 20903 [2021-06-05 23:23:15,733 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1101 ImplicationChecksByTransitivity, 1923.6ms TimeCoverageRelationStatistics Valid=682, Invalid=3350, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 23:23:15,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20903 states. [2021-06-05 23:23:15,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20903 to 11352. [2021-06-05 23:23:15,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11352 states, 11351 states have (on average 3.3419082019205355) internal successors, (37934), 11351 states have internal predecessors, (37934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:23:15,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11352 states to 11352 states and 37934 transitions. [2021-06-05 23:23:15,946 INFO L78 Accepts]: Start accepts. Automaton has 11352 states and 37934 transitions. Word has length 36 [2021-06-05 23:23:15,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:23:15,946 INFO L482 AbstractCegarLoop]: Abstraction has 11352 states and 37934 transitions. [2021-06-05 23:23:15,946 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:23:15,946 INFO L276 IsEmpty]: Start isEmpty. Operand 11352 states and 37934 transitions. [2021-06-05 23:23:15,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 23:23:15,958 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:23:15,958 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:23:16,158 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1169 [2021-06-05 23:23:16,159 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:23:16,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:23:16,159 INFO L82 PathProgramCache]: Analyzing trace with hash -364592279, now seen corresponding path program 151 times [2021-06-05 23:23:16,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:23:16,159 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158318795] [2021-06-05 23:23:16,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:23:16,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:23:16,405 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:23:16,405 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:23:16,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158318795] [2021-06-05 23:23:16,405 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158318795] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:23:16,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1049821580] [2021-06-05 23:23:16,405 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 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:23:16,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:23:16,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 23:23:16,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:23:17,183 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:23:17,184 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1049821580] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:23:17,184 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:23:17,184 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2021-06-05 23:23:17,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520690646] [2021-06-05 23:23:17,184 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 23:23:17,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:23:17,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 23:23:17,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=1137, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 23:23:17,185 INFO L87 Difference]: Start difference. First operand 11352 states and 37934 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:23:19,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:23:19,105 INFO L93 Difference]: Finished difference Result 18599 states and 61165 transitions. [2021-06-05 23:23:19,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-05 23:23:19,105 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 23:23:19,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:23:19,130 INFO L225 Difference]: With dead ends: 18599 [2021-06-05 23:23:19,130 INFO L226 Difference]: Without dead ends: 18504 [2021-06-05 23:23:19,130 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1080 ImplicationChecksByTransitivity, 1691.0ms TimeCoverageRelationStatistics Valid=615, Invalid=3417, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 23:23:19,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18504 states. [2021-06-05 23:23:19,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18504 to 11370. [2021-06-05 23:23:19,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11370 states, 11369 states have (on average 3.3415427918022695) internal successors, (37990), 11369 states have internal predecessors, (37990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:23:19,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11370 states to 11370 states and 37990 transitions. [2021-06-05 23:23:19,337 INFO L78 Accepts]: Start accepts. Automaton has 11370 states and 37990 transitions. Word has length 36 [2021-06-05 23:23:19,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:23:19,337 INFO L482 AbstractCegarLoop]: Abstraction has 11370 states and 37990 transitions. [2021-06-05 23:23:19,337 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:23:19,337 INFO L276 IsEmpty]: Start isEmpty. Operand 11370 states and 37990 transitions. [2021-06-05 23:23:19,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 23:23:19,350 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:23:19,350 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:23:19,550 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1181,151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:23:19,551 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:23:19,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:23:19,551 INFO L82 PathProgramCache]: Analyzing trace with hash 352975721, now seen corresponding path program 152 times [2021-06-05 23:23:19,551 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:23:19,551 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199218437] [2021-06-05 23:23:19,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:23:19,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:23:19,804 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:23:19,804 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:23:19,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199218437] [2021-06-05 23:23:19,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199218437] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:23:19,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005252727] [2021-06-05 23:23:19,805 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 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:23:19,828 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:23:19,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:23:19,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 23:23:19,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:23:20,479 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:23:20,480 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2005252727] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:23:20,480 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:23:20,480 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 34 [2021-06-05 23:23:20,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483920602] [2021-06-05 23:23:20,480 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 23:23:20,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:23:20,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 23:23:20,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=980, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 23:23:20,480 INFO L87 Difference]: Start difference. First operand 11370 states and 37990 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:23:22,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:23:22,774 INFO L93 Difference]: Finished difference Result 22611 states and 73757 transitions. [2021-06-05 23:23:22,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-05 23:23:22,775 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 23:23:22,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:23:22,804 INFO L225 Difference]: With dead ends: 22611 [2021-06-05 23:23:22,804 INFO L226 Difference]: Without dead ends: 22473 [2021-06-05 23:23:22,805 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1247 ImplicationChecksByTransitivity, 1946.0ms TimeCoverageRelationStatistics Valid=703, Invalid=3587, Unknown=0, NotChecked=0, Total=4290 [2021-06-05 23:23:22,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22473 states. [2021-06-05 23:23:22,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22473 to 10986. [2021-06-05 23:23:23,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10986 states, 10985 states have (on average 3.3325443786982247) internal successors, (36608), 10985 states have internal predecessors, (36608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:23:23,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10986 states to 10986 states and 36608 transitions. [2021-06-05 23:23:23,023 INFO L78 Accepts]: Start accepts. Automaton has 10986 states and 36608 transitions. Word has length 36 [2021-06-05 23:23:23,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:23:23,023 INFO L482 AbstractCegarLoop]: Abstraction has 10986 states and 36608 transitions. [2021-06-05 23:23:23,023 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:23:23,023 INFO L276 IsEmpty]: Start isEmpty. Operand 10986 states and 36608 transitions. [2021-06-05 23:23:23,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 23:23:23,035 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:23:23,035 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:23:23,235 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1193 [2021-06-05 23:23:23,235 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:23:23,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:23:23,236 INFO L82 PathProgramCache]: Analyzing trace with hash -1466234195, now seen corresponding path program 153 times [2021-06-05 23:23:23,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:23:23,236 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526323932] [2021-06-05 23:23:23,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:23:23,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:23:23,461 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:23:23,461 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:23:23,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526323932] [2021-06-05 23:23:23,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1526323932] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:23:23,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [971465313] [2021-06-05 23:23:23,461 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 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:23:23,485 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 23:23:23,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:23:23,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 23:23:23,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:23:24,129 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:23:24,129 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [971465313] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:23:24,129 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:23:24,129 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 33 [2021-06-05 23:23:24,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338281598] [2021-06-05 23:23:24,129 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 23:23:24,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:23:24,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 23:23:24,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=957, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 23:23:24,130 INFO L87 Difference]: Start difference. First operand 10986 states and 36608 transitions. Second operand has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:23:25,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:23:25,810 INFO L93 Difference]: Finished difference Result 17305 states and 57173 transitions. [2021-06-05 23:23:25,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-05 23:23:25,810 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 23:23:25,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:23:25,836 INFO L225 Difference]: With dead ends: 17305 [2021-06-05 23:23:25,836 INFO L226 Difference]: Without dead ends: 17185 [2021-06-05 23:23:25,836 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 965 ImplicationChecksByTransitivity, 1583.4ms TimeCoverageRelationStatistics Valid=529, Invalid=3131, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 23:23:25,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17185 states. [2021-06-05 23:23:26,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17185 to 10982. [2021-06-05 23:23:26,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10982 states, 10981 states have (on average 3.332665513159093) internal successors, (36596), 10981 states have internal predecessors, (36596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:23:26,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10982 states to 10982 states and 36596 transitions. [2021-06-05 23:23:26,085 INFO L78 Accepts]: Start accepts. Automaton has 10982 states and 36596 transitions. Word has length 36 [2021-06-05 23:23:26,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:23:26,085 INFO L482 AbstractCegarLoop]: Abstraction has 10982 states and 36596 transitions. [2021-06-05 23:23:26,085 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:23:26,085 INFO L276 IsEmpty]: Start isEmpty. Operand 10982 states and 36596 transitions. [2021-06-05 23:23:26,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 23:23:26,096 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:23:26,097 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:23:26,297 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1205,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:23:26,297 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:23:26,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:23:26,297 INFO L82 PathProgramCache]: Analyzing trace with hash 495290557, now seen corresponding path program 154 times [2021-06-05 23:23:26,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:23:26,298 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441865900] [2021-06-05 23:23:26,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:23:26,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:23:26,542 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:23:26,543 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:23:26,543 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441865900] [2021-06-05 23:23:26,543 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441865900] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:23:26,543 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40530225] [2021-06-05 23:23:26,543 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 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:23:26,566 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:23:26,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:23:26,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 23:23:26,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:23:27,235 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:23:27,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [40530225] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:23:27,235 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:23:27,235 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-06-05 23:23:27,236 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781497559] [2021-06-05 23:23:27,236 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 23:23:27,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:23:27,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 23:23:27,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=1000, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 23:23:27,236 INFO L87 Difference]: Start difference. First operand 10982 states and 36596 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:23:29,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:23:29,756 INFO L93 Difference]: Finished difference Result 18391 states and 60597 transitions. [2021-06-05 23:23:29,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-05 23:23:29,756 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 23:23:29,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:23:29,784 INFO L225 Difference]: With dead ends: 18391 [2021-06-05 23:23:29,784 INFO L226 Difference]: Without dead ends: 18271 [2021-06-05 23:23:29,785 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1165 ImplicationChecksByTransitivity, 2071.4ms TimeCoverageRelationStatistics Valid=695, Invalid=3465, Unknown=0, NotChecked=0, Total=4160 [2021-06-05 23:23:29,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18271 states. [2021-06-05 23:23:29,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18271 to 11132. [2021-06-05 23:23:30,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11132 states, 11131 states have (on average 3.3326745126224058) internal successors, (37096), 11131 states have internal predecessors, (37096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:23:30,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11132 states to 11132 states and 37096 transitions. [2021-06-05 23:23:30,028 INFO L78 Accepts]: Start accepts. Automaton has 11132 states and 37096 transitions. Word has length 36 [2021-06-05 23:23:30,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:23:30,028 INFO L482 AbstractCegarLoop]: Abstraction has 11132 states and 37096 transitions. [2021-06-05 23:23:30,028 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:23:30,028 INFO L276 IsEmpty]: Start isEmpty. Operand 11132 states and 37096 transitions. [2021-06-05 23:23:30,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 23:23:30,040 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:23:30,040 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:23:30,241 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1217,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:23:30,241 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:23:30,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:23:30,241 INFO L82 PathProgramCache]: Analyzing trace with hash -1805416575, now seen corresponding path program 155 times [2021-06-05 23:23:30,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:23:30,241 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417371985] [2021-06-05 23:23:30,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:23:30,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:23:30,574 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:23:30,574 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:23:30,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417371985] [2021-06-05 23:23:30,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417371985] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:23:30,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [449235178] [2021-06-05 23:23:30,574 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:23:30,598 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 23:23:30,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:23:30,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 23:23:30,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:23:31,166 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:23:31,166 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [449235178] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:23:31,166 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:23:31,166 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-06-05 23:23:31,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511466043] [2021-06-05 23:23:31,167 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 23:23:31,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:23:31,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 23:23:31,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=992, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 23:23:31,167 INFO L87 Difference]: Start difference. First operand 11132 states and 37096 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:23:34,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:23:34,164 INFO L93 Difference]: Finished difference Result 20236 states and 64588 transitions. [2021-06-05 23:23:34,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-05 23:23:34,164 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 23:23:34,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:23:34,191 INFO L225 Difference]: With dead ends: 20236 [2021-06-05 23:23:34,191 INFO L226 Difference]: Without dead ends: 20147 [2021-06-05 23:23:34,192 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1891 ImplicationChecksByTransitivity, 2684.6ms TimeCoverageRelationStatistics Valid=1011, Invalid=4841, Unknown=0, NotChecked=0, Total=5852 [2021-06-05 23:23:34,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20147 states. [2021-06-05 23:23:34,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20147 to 11326. [2021-06-05 23:23:34,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11326 states, 11325 states have (on average 3.3333333333333335) internal successors, (37750), 11325 states have internal predecessors, (37750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:23:34,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11326 states to 11326 states and 37750 transitions. [2021-06-05 23:23:34,404 INFO L78 Accepts]: Start accepts. Automaton has 11326 states and 37750 transitions. Word has length 36 [2021-06-05 23:23:34,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:23:34,405 INFO L482 AbstractCegarLoop]: Abstraction has 11326 states and 37750 transitions. [2021-06-05 23:23:34,405 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:23:34,405 INFO L276 IsEmpty]: Start isEmpty. Operand 11326 states and 37750 transitions. [2021-06-05 23:23:34,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 23:23:34,417 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:23:34,417 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:23:34,617 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1229 [2021-06-05 23:23:34,618 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:23:34,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:23:34,618 INFO L82 PathProgramCache]: Analyzing trace with hash -1309634939, now seen corresponding path program 156 times [2021-06-05 23:23:34,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:23:34,618 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137260275] [2021-06-05 23:23:34,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:23:34,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:23:34,886 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:23:34,886 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:23:34,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137260275] [2021-06-05 23:23:34,886 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137260275] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:23:34,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [326426902] [2021-06-05 23:23:34,886 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 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:23:34,909 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 23:23:34,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:23:34,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 23:23:34,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:23:35,429 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:23:35,429 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [326426902] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:23:35,429 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:23:35,429 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 35 [2021-06-05 23:23:35,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057518860] [2021-06-05 23:23:35,430 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 23:23:35,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:23:35,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 23:23:35,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=1083, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 23:23:35,430 INFO L87 Difference]: Start difference. First operand 11326 states and 37750 transitions. Second operand has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:23:40,450 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 48 [2021-06-05 23:23:41,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:23:41,031 INFO L93 Difference]: Finished difference Result 16605 states and 53248 transitions. [2021-06-05 23:23:41,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2021-06-05 23:23:41,032 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 23:23:41,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:23:41,055 INFO L225 Difference]: With dead ends: 16605 [2021-06-05 23:23:41,056 INFO L226 Difference]: Without dead ends: 16424 [2021-06-05 23:23:41,056 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4088 ImplicationChecksByTransitivity, 4361.4ms TimeCoverageRelationStatistics Valid=1264, Invalid=10726, Unknown=0, NotChecked=0, Total=11990 [2021-06-05 23:23:41,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16424 states. [2021-06-05 23:23:41,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16424 to 11368. [2021-06-05 23:23:41,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11368 states, 11367 states have (on average 3.3340371250109966) internal successors, (37898), 11367 states have internal predecessors, (37898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:23:41,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11368 states to 11368 states and 37898 transitions. [2021-06-05 23:23:41,251 INFO L78 Accepts]: Start accepts. Automaton has 11368 states and 37898 transitions. Word has length 36 [2021-06-05 23:23:41,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:23:41,251 INFO L482 AbstractCegarLoop]: Abstraction has 11368 states and 37898 transitions. [2021-06-05 23:23:41,251 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:23:41,251 INFO L276 IsEmpty]: Start isEmpty. Operand 11368 states and 37898 transitions. [2021-06-05 23:23:41,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 23:23:41,264 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:23:41,264 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:23:41,464 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1233,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:23:41,464 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:23:41,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:23:41,464 INFO L82 PathProgramCache]: Analyzing trace with hash -1498102399, now seen corresponding path program 157 times [2021-06-05 23:23:41,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:23:41,465 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469843640] [2021-06-05 23:23:41,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:23:41,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:23:41,746 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:23:41,746 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:23:41,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469843640] [2021-06-05 23:23:41,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469843640] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:23:41,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [615369621] [2021-06-05 23:23:41,746 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 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:23:41,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:23:41,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 23:23:41,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:23:42,400 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:23:42,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [615369621] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:23:42,400 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:23:42,400 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 37 [2021-06-05 23:23:42,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100853530] [2021-06-05 23:23:42,400 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 23:23:42,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:23:42,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 23:23:42,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=1167, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 23:23:42,401 INFO L87 Difference]: Start difference. First operand 11368 states and 37898 transitions. Second operand has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:23:47,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:23:47,683 INFO L93 Difference]: Finished difference Result 21161 states and 67108 transitions. [2021-06-05 23:23:47,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2021-06-05 23:23:47,684 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 23:23:47,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:23:47,713 INFO L225 Difference]: With dead ends: 21161 [2021-06-05 23:23:47,713 INFO L226 Difference]: Without dead ends: 20892 [2021-06-05 23:23:47,714 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4391 ImplicationChecksByTransitivity, 4517.1ms TimeCoverageRelationStatistics Valid=2139, Invalid=10743, Unknown=0, NotChecked=0, Total=12882 [2021-06-05 23:23:47,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20892 states. [2021-06-05 23:23:47,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20892 to 11410. [2021-06-05 23:23:47,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11410 states, 11409 states have (on average 3.3350863353492857) internal successors, (38050), 11409 states have internal predecessors, (38050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:23:47,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11410 states to 11410 states and 38050 transitions. [2021-06-05 23:23:47,953 INFO L78 Accepts]: Start accepts. Automaton has 11410 states and 38050 transitions. Word has length 36 [2021-06-05 23:23:47,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:23:47,953 INFO L482 AbstractCegarLoop]: Abstraction has 11410 states and 38050 transitions. [2021-06-05 23:23:47,953 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:23:47,953 INFO L276 IsEmpty]: Start isEmpty. Operand 11410 states and 38050 transitions. [2021-06-05 23:23:47,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 23:23:47,966 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:23:47,966 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:23:48,166 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1237 [2021-06-05 23:23:48,166 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:23:48,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:23:48,167 INFO L82 PathProgramCache]: Analyzing trace with hash 963545901, now seen corresponding path program 158 times [2021-06-05 23:23:48,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:23:48,167 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729382685] [2021-06-05 23:23:48,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:23:48,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:23:48,513 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:23:48,513 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:23:48,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729382685] [2021-06-05 23:23:48,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729382685] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:23:48,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1373241529] [2021-06-05 23:23:48,513 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 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:23:48,535 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:23:48,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:23:48,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 23:23:48,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:23:49,099 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:23:49,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1373241529] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:23:49,099 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:23:49,099 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 34 [2021-06-05 23:23:49,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143266111] [2021-06-05 23:23:49,100 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 23:23:49,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:23:49,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 23:23:49,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=988, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 23:23:49,100 INFO L87 Difference]: Start difference. First operand 11410 states and 38050 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:23:52,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:23:52,343 INFO L93 Difference]: Finished difference Result 21786 states and 69890 transitions. [2021-06-05 23:23:52,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-06-05 23:23:52,343 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 23:23:52,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:23:52,375 INFO L225 Difference]: With dead ends: 21786 [2021-06-05 23:23:52,375 INFO L226 Difference]: Without dead ends: 21660 [2021-06-05 23:23:52,376 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2105 ImplicationChecksByTransitivity, 2831.4ms TimeCoverageRelationStatistics Valid=1139, Invalid=5341, Unknown=0, NotChecked=0, Total=6480 [2021-06-05 23:23:52,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21660 states. [2021-06-05 23:23:52,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21660 to 11460. [2021-06-05 23:23:52,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11460 states, 11459 states have (on average 3.3358931843965443) internal successors, (38226), 11459 states have internal predecessors, (38226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:23:52,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11460 states to 11460 states and 38226 transitions. [2021-06-05 23:23:52,614 INFO L78 Accepts]: Start accepts. Automaton has 11460 states and 38226 transitions. Word has length 36 [2021-06-05 23:23:52,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:23:52,614 INFO L482 AbstractCegarLoop]: Abstraction has 11460 states and 38226 transitions. [2021-06-05 23:23:52,615 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:23:52,615 INFO L276 IsEmpty]: Start isEmpty. Operand 11460 states and 38226 transitions. [2021-06-05 23:23:52,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 23:23:52,627 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:23:52,627 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:23:52,827 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1241,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:23:52,827 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:23:52,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:23:52,827 INFO L82 PathProgramCache]: Analyzing trace with hash 1459327537, now seen corresponding path program 159 times [2021-06-05 23:23:52,827 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:23:52,828 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924342181] [2021-06-05 23:23:52,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:23:52,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:23:53,116 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:23:53,116 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:23:53,116 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924342181] [2021-06-05 23:23:53,116 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924342181] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:23:53,116 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1086436005] [2021-06-05 23:23:53,116 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 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:23:53,139 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 23:23:53,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:23:53,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 23:23:53,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:23:53,720 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:23:53,721 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1086436005] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:23:53,721 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:23:53,721 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 36 [2021-06-05 23:23:53,721 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000980115] [2021-06-05 23:23:53,721 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 23:23:53,721 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:23:53,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 23:23:53,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=1151, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 23:23:53,721 INFO L87 Difference]: Start difference. First operand 11460 states and 38226 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:23:58,827 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 48 [2021-06-05 23:23:59,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:23:59,382 INFO L93 Difference]: Finished difference Result 17579 states and 56141 transitions. [2021-06-05 23:23:59,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2021-06-05 23:23:59,382 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 23:23:59,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:23:59,405 INFO L225 Difference]: With dead ends: 17579 [2021-06-05 23:23:59,406 INFO L226 Difference]: Without dead ends: 17398 [2021-06-05 23:23:59,406 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4363 ImplicationChecksByTransitivity, 4672.1ms TimeCoverageRelationStatistics Valid=1444, Invalid=11438, Unknown=0, NotChecked=0, Total=12882 [2021-06-05 23:23:59,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17398 states. [2021-06-05 23:23:59,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17398 to 11498. [2021-06-05 23:23:59,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11498 states, 11497 states have (on average 3.337566321649126) internal successors, (38372), 11497 states have internal predecessors, (38372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:23:59,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11498 states to 11498 states and 38372 transitions. [2021-06-05 23:23:59,610 INFO L78 Accepts]: Start accepts. Automaton has 11498 states and 38372 transitions. Word has length 36 [2021-06-05 23:23:59,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:23:59,610 INFO L482 AbstractCegarLoop]: Abstraction has 11498 states and 38372 transitions. [2021-06-05 23:23:59,610 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:23:59,610 INFO L276 IsEmpty]: Start isEmpty. Operand 11498 states and 38372 transitions. [2021-06-05 23:23:59,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 23:23:59,622 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:23:59,623 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:23:59,823 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1248 [2021-06-05 23:23:59,823 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:23:59,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:23:59,823 INFO L82 PathProgramCache]: Analyzing trace with hash 1813202505, now seen corresponding path program 160 times [2021-06-05 23:23:59,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:23:59,823 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284592061] [2021-06-05 23:23:59,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:23:59,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:24:00,132 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:24:00,132 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:24:00,132 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284592061] [2021-06-05 23:24:00,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284592061] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:24:00,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1256335188] [2021-06-05 23:24:00,133 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 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:24:00,155 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:24:00,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:24:00,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 23:24:00,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:24:00,749 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:24:00,749 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1256335188] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:24:00,749 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:24:00,749 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-06-05 23:24:00,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563811342] [2021-06-05 23:24:00,749 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 23:24:00,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:24:00,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 23:24:00,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=1029, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 23:24:00,750 INFO L87 Difference]: Start difference. First operand 11498 states and 38372 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:24:02,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:24:02,347 INFO L93 Difference]: Finished difference Result 13597 states and 44563 transitions. [2021-06-05 23:24:02,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 23:24:02,347 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 23:24:02,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:24:02,366 INFO L225 Difference]: With dead ends: 13597 [2021-06-05 23:24:02,366 INFO L226 Difference]: Without dead ends: 13502 [2021-06-05 23:24:02,367 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 687 ImplicationChecksByTransitivity, 1501.0ms TimeCoverageRelationStatistics Valid=418, Invalid=2444, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 23:24:02,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13502 states. [2021-06-05 23:24:02,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13502 to 11524. [2021-06-05 23:24:02,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11524 states, 11523 states have (on average 3.337498915213052) internal successors, (38458), 11523 states have internal predecessors, (38458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:24:02,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11524 states to 11524 states and 38458 transitions. [2021-06-05 23:24:02,537 INFO L78 Accepts]: Start accepts. Automaton has 11524 states and 38458 transitions. Word has length 36 [2021-06-05 23:24:02,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:24:02,537 INFO L482 AbstractCegarLoop]: Abstraction has 11524 states and 38458 transitions. [2021-06-05 23:24:02,537 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:24:02,537 INFO L276 IsEmpty]: Start isEmpty. Operand 11524 states and 38458 transitions. [2021-06-05 23:24:02,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 23:24:02,549 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:24:02,549 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:24:02,750 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1252,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:24:02,750 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:24:02,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:24:02,750 INFO L82 PathProgramCache]: Analyzing trace with hash -1560062651, now seen corresponding path program 161 times [2021-06-05 23:24:02,750 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:24:02,750 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36258864] [2021-06-05 23:24:02,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:24:02,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:24:03,066 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:24:03,066 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:24:03,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36258864] [2021-06-05 23:24:03,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36258864] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:24:03,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1070278424] [2021-06-05 23:24:03,066 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 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:24:03,088 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 23:24:03,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:24:03,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 23:24:03,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:24:03,628 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:24:03,628 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1070278424] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:24:03,628 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:24:03,628 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-06-05 23:24:03,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218308086] [2021-06-05 23:24:03,628 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 23:24:03,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:24:03,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 23:24:03,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=1012, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 23:24:03,629 INFO L87 Difference]: Start difference. First operand 11524 states and 38458 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:24:04,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:24:04,773 INFO L93 Difference]: Finished difference Result 15426 states and 50491 transitions. [2021-06-05 23:24:04,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 23:24:04,773 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 23:24:04,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:24:04,796 INFO L225 Difference]: With dead ends: 15426 [2021-06-05 23:24:04,796 INFO L226 Difference]: Without dead ends: 15346 [2021-06-05 23:24:04,796 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 562 ImplicationChecksByTransitivity, 1214.7ms TimeCoverageRelationStatistics Valid=352, Invalid=1810, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 23:24:04,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15346 states. [2021-06-05 23:24:04,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15346 to 11520. [2021-06-05 23:24:04,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11520 states, 11519 states have (on average 3.3367479815956247) internal successors, (38436), 11519 states have internal predecessors, (38436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:24:04,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11520 states to 11520 states and 38436 transitions. [2021-06-05 23:24:04,993 INFO L78 Accepts]: Start accepts. Automaton has 11520 states and 38436 transitions. Word has length 36 [2021-06-05 23:24:04,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:24:04,993 INFO L482 AbstractCegarLoop]: Abstraction has 11520 states and 38436 transitions. [2021-06-05 23:24:04,994 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:24:04,994 INFO L276 IsEmpty]: Start isEmpty. Operand 11520 states and 38436 transitions. [2021-06-05 23:24:05,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 23:24:05,007 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:24:05,007 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:24:05,207 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1259 [2021-06-05 23:24:05,208 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:24:05,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:24:05,208 INFO L82 PathProgramCache]: Analyzing trace with hash -1630172687, now seen corresponding path program 162 times [2021-06-05 23:24:05,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:24:05,208 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722367688] [2021-06-05 23:24:05,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:24:05,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:24:05,592 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:24:05,592 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:24:05,592 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722367688] [2021-06-05 23:24:05,592 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722367688] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:24:05,592 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2015071079] [2021-06-05 23:24:05,592 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 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:24:05,615 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 23:24:05,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:24:05,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 23:24:05,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:24:06,154 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:24:06,154 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2015071079] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:24:06,154 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:24:06,154 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 33 [2021-06-05 23:24:06,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759062042] [2021-06-05 23:24:06,154 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 23:24:06,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:24:06,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 23:24:06,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=940, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 23:24:06,155 INFO L87 Difference]: Start difference. First operand 11520 states and 38436 transitions. Second operand has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:24:07,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:24:07,698 INFO L93 Difference]: Finished difference Result 16762 states and 55010 transitions. [2021-06-05 23:24:07,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 23:24:07,698 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 23:24:07,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:24:07,722 INFO L225 Difference]: With dead ends: 16762 [2021-06-05 23:24:07,723 INFO L226 Difference]: Without dead ends: 16642 [2021-06-05 23:24:07,723 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 655 ImplicationChecksByTransitivity, 1541.6ms TimeCoverageRelationStatistics Valid=444, Invalid=2106, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 23:24:07,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16642 states. [2021-06-05 23:24:07,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16642 to 11524. [2021-06-05 23:24:07,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11524 states, 11523 states have (on average 3.3366310856547776) internal successors, (38448), 11523 states have internal predecessors, (38448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:24:07,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11524 states to 11524 states and 38448 transitions. [2021-06-05 23:24:07,911 INFO L78 Accepts]: Start accepts. Automaton has 11524 states and 38448 transitions. Word has length 36 [2021-06-05 23:24:07,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:24:07,911 INFO L482 AbstractCegarLoop]: Abstraction has 11524 states and 38448 transitions. [2021-06-05 23:24:07,911 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:24:07,912 INFO L276 IsEmpty]: Start isEmpty. Operand 11524 states and 38448 transitions. [2021-06-05 23:24:07,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 23:24:07,924 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:24:07,924 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:24:08,128 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1263,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:24:08,129 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:24:08,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:24:08,129 INFO L82 PathProgramCache]: Analyzing trace with hash 1091873285, now seen corresponding path program 163 times [2021-06-05 23:24:08,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:24:08,129 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396192359] [2021-06-05 23:24:08,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:24:08,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:24:08,400 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:24:08,400 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:24:08,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396192359] [2021-06-05 23:24:08,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396192359] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:24:08,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1336194517] [2021-06-05 23:24:08,401 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 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:24:08,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:24:08,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 23:24:08,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:24:08,960 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:24:08,961 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1336194517] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:24:08,961 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:24:08,961 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2021-06-05 23:24:08,961 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480651653] [2021-06-05 23:24:08,961 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 23:24:08,961 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:24:08,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 23:24:08,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=1153, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 23:24:08,961 INFO L87 Difference]: Start difference. First operand 11524 states and 38448 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:24:11,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:24:11,389 INFO L93 Difference]: Finished difference Result 13028 states and 42581 transitions. [2021-06-05 23:24:11,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-06-05 23:24:11,390 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 23:24:11,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:24:11,408 INFO L225 Difference]: With dead ends: 13028 [2021-06-05 23:24:11,408 INFO L226 Difference]: Without dead ends: 12867 [2021-06-05 23:24:11,408 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1478 ImplicationChecksByTransitivity, 2256.2ms TimeCoverageRelationStatistics Valid=700, Invalid=4702, Unknown=0, NotChecked=0, Total=5402 [2021-06-05 23:24:11,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12867 states. [2021-06-05 23:24:11,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12867 to 11544. [2021-06-05 23:24:11,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11544 states, 11543 states have (on average 3.335614658234428) internal successors, (38503), 11543 states have internal predecessors, (38503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:24:11,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11544 states to 11544 states and 38503 transitions. [2021-06-05 23:24:11,575 INFO L78 Accepts]: Start accepts. Automaton has 11544 states and 38503 transitions. Word has length 36 [2021-06-05 23:24:11,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:24:11,575 INFO L482 AbstractCegarLoop]: Abstraction has 11544 states and 38503 transitions. [2021-06-05 23:24:11,575 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:24:11,575 INFO L276 IsEmpty]: Start isEmpty. Operand 11544 states and 38503 transitions. [2021-06-05 23:24:11,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 23:24:11,588 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:24:11,588 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:24:11,788 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1270,163 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:24:11,788 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:24:11,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:24:11,789 INFO L82 PathProgramCache]: Analyzing trace with hash 2084366849, now seen corresponding path program 164 times [2021-06-05 23:24:11,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:24:11,789 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667177060] [2021-06-05 23:24:11,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:24:11,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:24:12,053 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:24:12,053 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:24:12,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667177060] [2021-06-05 23:24:12,053 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667177060] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:24:12,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1368195348] [2021-06-05 23:24:12,053 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 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:24:12,075 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:24:12,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:24:12,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 23:24:12,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:24:12,575 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:24:12,575 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1368195348] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:24:12,575 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:24:12,575 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 35 [2021-06-05 23:24:12,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407346501] [2021-06-05 23:24:12,575 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 23:24:12,575 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:24:12,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 23:24:12,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=1080, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 23:24:12,575 INFO L87 Difference]: Start difference. First operand 11544 states and 38503 transitions. Second operand has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:24:15,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:24:15,631 INFO L93 Difference]: Finished difference Result 15764 states and 50798 transitions. [2021-06-05 23:24:15,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-06-05 23:24:15,632 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 23:24:15,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:24:15,654 INFO L225 Difference]: With dead ends: 15764 [2021-06-05 23:24:15,655 INFO L226 Difference]: Without dead ends: 15568 [2021-06-05 23:24:15,655 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2115 ImplicationChecksByTransitivity, 2522.8ms TimeCoverageRelationStatistics Valid=939, Invalid=6033, Unknown=0, NotChecked=0, Total=6972 [2021-06-05 23:24:15,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15568 states. [2021-06-05 23:24:15,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15568 to 11569. [2021-06-05 23:24:15,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11569 states, 11568 states have (on average 3.3374827109266945) internal successors, (38608), 11568 states have internal predecessors, (38608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:24:15,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11569 states to 11569 states and 38608 transitions. [2021-06-05 23:24:15,846 INFO L78 Accepts]: Start accepts. Automaton has 11569 states and 38608 transitions. Word has length 36 [2021-06-05 23:24:15,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:24:15,846 INFO L482 AbstractCegarLoop]: Abstraction has 11569 states and 38608 transitions. [2021-06-05 23:24:15,846 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:24:15,846 INFO L276 IsEmpty]: Start isEmpty. Operand 11569 states and 38608 transitions. [2021-06-05 23:24:15,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 23:24:15,859 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:24:15,859 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:24:16,059 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1274,164 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:24:16,060 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:24:16,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:24:16,060 INFO L82 PathProgramCache]: Analyzing trace with hash -866868307, now seen corresponding path program 165 times [2021-06-05 23:24:16,060 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:24:16,060 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532967294] [2021-06-05 23:24:16,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:24:16,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:24:16,330 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:24:16,330 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:24:16,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532967294] [2021-06-05 23:24:16,330 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532967294] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:24:16,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1716310589] [2021-06-05 23:24:16,330 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 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:24:16,353 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 23:24:16,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:24:16,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 23:24:16,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:24:16,899 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:24:16,900 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1716310589] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:24:16,900 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:24:16,900 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 35 [2021-06-05 23:24:16,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23196616] [2021-06-05 23:24:16,900 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 23:24:16,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:24:16,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 23:24:16,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=1082, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 23:24:16,900 INFO L87 Difference]: Start difference. First operand 11569 states and 38608 transitions. Second operand has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:24:19,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:24:19,749 INFO L93 Difference]: Finished difference Result 14166 states and 46091 transitions. [2021-06-05 23:24:19,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-06-05 23:24:19,750 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 23:24:19,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:24:19,770 INFO L225 Difference]: With dead ends: 14166 [2021-06-05 23:24:19,770 INFO L226 Difference]: Without dead ends: 13970 [2021-06-05 23:24:19,771 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1688 ImplicationChecksByTransitivity, 2258.4ms TimeCoverageRelationStatistics Valid=792, Invalid=5060, Unknown=0, NotChecked=0, Total=5852 [2021-06-05 23:24:19,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13970 states. [2021-06-05 23:24:19,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13970 to 11583. [2021-06-05 23:24:19,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11583 states, 11582 states have (on average 3.337247452944224) internal successors, (38652), 11582 states have internal predecessors, (38652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:24:19,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11583 states to 11583 states and 38652 transitions. [2021-06-05 23:24:19,949 INFO L78 Accepts]: Start accepts. Automaton has 11583 states and 38652 transitions. Word has length 36 [2021-06-05 23:24:19,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:24:19,949 INFO L482 AbstractCegarLoop]: Abstraction has 11583 states and 38652 transitions. [2021-06-05 23:24:19,949 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:24:19,950 INFO L276 IsEmpty]: Start isEmpty. Operand 11583 states and 38652 transitions. [2021-06-05 23:24:19,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 23:24:19,962 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:24:19,962 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:24:20,162 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1278 [2021-06-05 23:24:20,163 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:24:20,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:24:20,163 INFO L82 PathProgramCache]: Analyzing trace with hash -1898400187, now seen corresponding path program 166 times [2021-06-05 23:24:20,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:24:20,163 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850562204] [2021-06-05 23:24:20,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:24:20,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:24:20,505 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:24:20,505 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:24:20,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850562204] [2021-06-05 23:24:20,505 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850562204] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:24:20,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056439426] [2021-06-05 23:24:20,505 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 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:24:20,527 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:24:20,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:24:20,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 23:24:20,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:24:21,074 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:24:21,074 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2056439426] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:24:21,074 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:24:21,074 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-06-05 23:24:21,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498702530] [2021-06-05 23:24:21,075 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 23:24:21,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:24:21,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 23:24:21,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=1017, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 23:24:21,075 INFO L87 Difference]: Start difference. First operand 11583 states and 38652 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:24:22,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:24:22,952 INFO L93 Difference]: Finished difference Result 15912 states and 52023 transitions. [2021-06-05 23:24:22,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-05 23:24:22,952 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 23:24:22,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:24:22,975 INFO L225 Difference]: With dead ends: 15912 [2021-06-05 23:24:22,975 INFO L226 Difference]: Without dead ends: 15743 [2021-06-05 23:24:22,976 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 896 ImplicationChecksByTransitivity, 1871.4ms TimeCoverageRelationStatistics Valid=504, Invalid=3036, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 23:24:22,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15743 states. [2021-06-05 23:24:23,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15743 to 11592. [2021-06-05 23:24:23,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11592 states, 11591 states have (on average 3.337934604434475) internal successors, (38690), 11591 states have internal predecessors, (38690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:24:23,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11592 states to 11592 states and 38690 transitions. [2021-06-05 23:24:23,165 INFO L78 Accepts]: Start accepts. Automaton has 11592 states and 38690 transitions. Word has length 36 [2021-06-05 23:24:23,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:24:23,165 INFO L482 AbstractCegarLoop]: Abstraction has 11592 states and 38690 transitions. [2021-06-05 23:24:23,165 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:24:23,165 INFO L276 IsEmpty]: Start isEmpty. Operand 11592 states and 38690 transitions. [2021-06-05 23:24:23,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 23:24:23,179 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:24:23,179 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:24:23,392 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1282,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:24:23,393 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:24:23,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:24:23,393 INFO L82 PathProgramCache]: Analyzing trace with hash -1499639123, now seen corresponding path program 167 times [2021-06-05 23:24:23,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:24:23,393 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437293597] [2021-06-05 23:24:23,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:24:23,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:24:23,617 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:24:23,617 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:24:23,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437293597] [2021-06-05 23:24:23,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437293597] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:24:23,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080726022] [2021-06-05 23:24:23,618 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 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:24:23,641 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 23:24:23,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:24:23,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 23:24:23,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:24:24,153 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:24:24,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2080726022] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:24:24,153 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:24:24,153 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-06-05 23:24:24,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654209412] [2021-06-05 23:24:24,154 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 23:24:24,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:24:24,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 23:24:24,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=995, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 23:24:24,154 INFO L87 Difference]: Start difference. First operand 11592 states and 38690 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:24:25,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:24:25,767 INFO L93 Difference]: Finished difference Result 16908 states and 55375 transitions. [2021-06-05 23:24:25,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 23:24:25,767 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 23:24:25,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:24:25,791 INFO L225 Difference]: With dead ends: 16908 [2021-06-05 23:24:25,791 INFO L226 Difference]: Without dead ends: 16828 [2021-06-05 23:24:25,792 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 806 ImplicationChecksByTransitivity, 1412.9ms TimeCoverageRelationStatistics Valid=573, Invalid=2619, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 23:24:25,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16828 states. [2021-06-05 23:24:25,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16828 to 11611. [2021-06-05 23:24:25,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11611 states, 11610 states have (on average 3.337639965546942) internal successors, (38750), 11610 states have internal predecessors, (38750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:24:25,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11611 states to 11611 states and 38750 transitions. [2021-06-05 23:24:25,995 INFO L78 Accepts]: Start accepts. Automaton has 11611 states and 38750 transitions. Word has length 36 [2021-06-05 23:24:25,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:24:25,995 INFO L482 AbstractCegarLoop]: Abstraction has 11611 states and 38750 transitions. [2021-06-05 23:24:25,995 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:24:25,996 INFO L276 IsEmpty]: Start isEmpty. Operand 11611 states and 38750 transitions. [2021-06-05 23:24:26,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 23:24:26,008 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:24:26,008 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:24:26,208 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1287 [2021-06-05 23:24:26,208 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:24:26,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:24:26,209 INFO L82 PathProgramCache]: Analyzing trace with hash -615772479, now seen corresponding path program 168 times [2021-06-05 23:24:26,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:24:26,209 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620150194] [2021-06-05 23:24:26,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:24:26,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:24:26,509 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:24:26,510 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:24:26,510 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620150194] [2021-06-05 23:24:26,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620150194] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:24:26,510 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1292640398] [2021-06-05 23:24:26,510 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 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:24:26,532 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 23:24:26,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:24:26,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 23:24:26,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:24:27,100 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:24:27,100 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1292640398] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:24:27,101 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:24:27,101 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 36 [2021-06-05 23:24:27,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805108378] [2021-06-05 23:24:27,101 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 23:24:27,101 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:24:27,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 23:24:27,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=1177, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 23:24:27,101 INFO L87 Difference]: Start difference. First operand 11611 states and 38750 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:24:31,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:24:31,173 INFO L93 Difference]: Finished difference Result 14311 states and 46258 transitions. [2021-06-05 23:24:31,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-06-05 23:24:31,173 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 23:24:31,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:24:31,193 INFO L225 Difference]: With dead ends: 14311 [2021-06-05 23:24:31,193 INFO L226 Difference]: Without dead ends: 14035 [2021-06-05 23:24:31,194 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2344 ImplicationChecksByTransitivity, 3075.5ms TimeCoverageRelationStatistics Valid=857, Invalid=7153, Unknown=0, NotChecked=0, Total=8010 [2021-06-05 23:24:31,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14035 states. [2021-06-05 23:24:31,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14035 to 11725. [2021-06-05 23:24:31,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11725 states, 11724 states have (on average 3.336148072330263) internal successors, (39113), 11724 states have internal predecessors, (39113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:24:31,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11725 states to 11725 states and 39113 transitions. [2021-06-05 23:24:31,377 INFO L78 Accepts]: Start accepts. Automaton has 11725 states and 39113 transitions. Word has length 36 [2021-06-05 23:24:31,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:24:31,377 INFO L482 AbstractCegarLoop]: Abstraction has 11725 states and 39113 transitions. [2021-06-05 23:24:31,377 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:24:31,377 INFO L276 IsEmpty]: Start isEmpty. Operand 11725 states and 39113 transitions. [2021-06-05 23:24:31,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 23:24:31,389 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:24:31,389 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:24:31,590 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1301,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:24:31,590 INFO L430 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:24:31,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:24:31,590 INFO L82 PathProgramCache]: Analyzing trace with hash -1770766743, now seen corresponding path program 169 times [2021-06-05 23:24:31,590 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:24:31,590 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474639962] [2021-06-05 23:24:31,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:24:31,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:24:31,878 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:24:31,878 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:24:31,878 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474639962] [2021-06-05 23:24:31,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474639962] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:24:31,878 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [71314233] [2021-06-05 23:24:31,878 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 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:24:31,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:24:31,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 23:24:31,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:24:32,527 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:24:32,527 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [71314233] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:24:32,527 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:24:32,527 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 37 [2021-06-05 23:24:32,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106148692] [2021-06-05 23:24:32,527 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 23:24:32,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:24:32,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 23:24:32,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=1223, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 23:24:32,528 INFO L87 Difference]: Start difference. First operand 11725 states and 39113 transitions. Second operand has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:24:35,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:24:35,604 INFO L93 Difference]: Finished difference Result 13657 states and 44373 transitions. [2021-06-05 23:24:35,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-06-05 23:24:35,605 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 23:24:35,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:24:35,624 INFO L225 Difference]: With dead ends: 13657 [2021-06-05 23:24:35,624 INFO L226 Difference]: Without dead ends: 13442 [2021-06-05 23:24:35,625 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1983 ImplicationChecksByTransitivity, 2719.4ms TimeCoverageRelationStatistics Valid=963, Invalid=6009, Unknown=0, NotChecked=0, Total=6972 [2021-06-05 23:24:35,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13442 states. [2021-06-05 23:24:35,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13442 to 11763. [2021-06-05 23:24:35,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11763 states, 11762 states have (on average 3.335062064274783) internal successors, (39227), 11762 states have internal predecessors, (39227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:24:35,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11763 states to 11763 states and 39227 transitions. [2021-06-05 23:24:35,810 INFO L78 Accepts]: Start accepts. Automaton has 11763 states and 39227 transitions. Word has length 36 [2021-06-05 23:24:35,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:24:35,810 INFO L482 AbstractCegarLoop]: Abstraction has 11763 states and 39227 transitions. [2021-06-05 23:24:35,810 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:24:35,810 INFO L276 IsEmpty]: Start isEmpty. Operand 11763 states and 39227 transitions. [2021-06-05 23:24:35,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 23:24:35,823 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:24:35,823 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:24:36,024 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1305 [2021-06-05 23:24:36,024 INFO L430 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:24:36,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:24:36,024 INFO L82 PathProgramCache]: Analyzing trace with hash 617313897, now seen corresponding path program 170 times [2021-06-05 23:24:36,024 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:24:36,024 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012132352] [2021-06-05 23:24:36,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:24:36,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:24:36,358 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:24:36,358 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:24:36,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012132352] [2021-06-05 23:24:36,358 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012132352] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:24:36,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [214634017] [2021-06-05 23:24:36,358 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 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:24:36,381 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:24:36,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:24:36,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 23:24:36,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:24:36,912 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:24:36,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [214634017] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:24:36,912 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:24:36,912 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 36 [2021-06-05 23:24:36,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827503662] [2021-06-05 23:24:36,912 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 23:24:36,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:24:36,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 23:24:36,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=1128, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 23:24:36,913 INFO L87 Difference]: Start difference. First operand 11763 states and 39227 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:24:42,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:24:42,157 INFO L93 Difference]: Finished difference Result 18226 states and 58244 transitions. [2021-06-05 23:24:42,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2021-06-05 23:24:42,157 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 23:24:42,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:24:42,182 INFO L225 Difference]: With dead ends: 18226 [2021-06-05 23:24:42,182 INFO L226 Difference]: Without dead ends: 17945 [2021-06-05 23:24:42,183 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4376 ImplicationChecksByTransitivity, 4264.8ms TimeCoverageRelationStatistics Valid=1878, Invalid=11004, Unknown=0, NotChecked=0, Total=12882 [2021-06-05 23:24:42,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17945 states. [2021-06-05 23:24:42,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17945 to 11807. [2021-06-05 23:24:42,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11807 states, 11806 states have (on average 3.33703201761816) internal successors, (39397), 11806 states have internal predecessors, (39397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:24:42,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11807 states to 11807 states and 39397 transitions. [2021-06-05 23:24:42,398 INFO L78 Accepts]: Start accepts. Automaton has 11807 states and 39397 transitions. Word has length 36 [2021-06-05 23:24:42,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:24:42,398 INFO L482 AbstractCegarLoop]: Abstraction has 11807 states and 39397 transitions. [2021-06-05 23:24:42,398 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:24:42,398 INFO L276 IsEmpty]: Start isEmpty. Operand 11807 states and 39397 transitions. [2021-06-05 23:24:42,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 23:24:42,411 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:24:42,411 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:24:42,611 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1309,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:24:42,611 INFO L430 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:24:42,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:24:42,611 INFO L82 PathProgramCache]: Analyzing trace with hash 408274093, now seen corresponding path program 171 times [2021-06-05 23:24:42,612 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:24:42,612 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122619834] [2021-06-05 23:24:42,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:24:42,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:24:42,881 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:24:42,881 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:24:42,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122619834] [2021-06-05 23:24:42,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122619834] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:24:42,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1197658962] [2021-06-05 23:24:42,881 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 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:24:42,904 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 23:24:42,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:24:42,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 23:24:42,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:24:43,410 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:24:43,410 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1197658962] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:24:43,410 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:24:43,410 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 35 [2021-06-05 23:24:43,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376247489] [2021-06-05 23:24:43,410 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 23:24:43,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:24:43,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 23:24:43,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=1088, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 23:24:43,411 INFO L87 Difference]: Start difference. First operand 11807 states and 39397 transitions. Second operand has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:24:46,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:24:46,168 INFO L93 Difference]: Finished difference Result 14492 states and 47022 transitions. [2021-06-05 23:24:46,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-06-05 23:24:46,168 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 23:24:46,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:24:46,189 INFO L225 Difference]: With dead ends: 14492 [2021-06-05 23:24:46,189 INFO L226 Difference]: Without dead ends: 14296 [2021-06-05 23:24:46,190 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1718 ImplicationChecksByTransitivity, 2226.0ms TimeCoverageRelationStatistics Valid=778, Invalid=5228, Unknown=0, NotChecked=0, Total=6006 [2021-06-05 23:24:46,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14296 states. [2021-06-05 23:24:46,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14296 to 11793. [2021-06-05 23:24:46,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11793 states, 11792 states have (on average 3.337771370420624) internal successors, (39359), 11792 states have internal predecessors, (39359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:24:46,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11793 states to 11793 states and 39359 transitions. [2021-06-05 23:24:46,377 INFO L78 Accepts]: Start accepts. Automaton has 11793 states and 39359 transitions. Word has length 36 [2021-06-05 23:24:46,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:24:46,377 INFO L482 AbstractCegarLoop]: Abstraction has 11793 states and 39359 transitions. [2021-06-05 23:24:46,377 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:24:46,378 INFO L276 IsEmpty]: Start isEmpty. Operand 11793 states and 39359 transitions. [2021-06-05 23:24:46,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 23:24:46,390 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:24:46,390 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:24:46,591 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1313 [2021-06-05 23:24:46,591 INFO L430 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:24:46,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:24:46,591 INFO L82 PathProgramCache]: Analyzing trace with hash -623257787, now seen corresponding path program 172 times [2021-06-05 23:24:46,591 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:24:46,591 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207654238] [2021-06-05 23:24:46,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:24:46,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:24:46,911 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:24:46,911 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:24:46,911 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207654238] [2021-06-05 23:24:46,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207654238] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:24:46,911 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1594294309] [2021-06-05 23:24:46,911 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 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:24:46,933 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:24:46,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:24:46,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 23:24:46,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:24:47,441 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:24:47,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1594294309] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:24:47,441 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:24:47,441 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-06-05 23:24:47,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994541741] [2021-06-05 23:24:47,442 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 23:24:47,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:24:47,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 23:24:47,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=1017, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 23:24:47,442 INFO L87 Difference]: Start difference. First operand 11793 states and 39359 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:24:49,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:24:49,560 INFO L93 Difference]: Finished difference Result 15520 states and 50803 transitions. [2021-06-05 23:24:49,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-05 23:24:49,560 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 23:24:49,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:24:49,583 INFO L225 Difference]: With dead ends: 15520 [2021-06-05 23:24:49,583 INFO L226 Difference]: Without dead ends: 15351 [2021-06-05 23:24:49,583 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 884 ImplicationChecksByTransitivity, 1823.9ms TimeCoverageRelationStatistics Valid=497, Invalid=3043, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 23:24:49,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15351 states. [2021-06-05 23:24:49,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15351 to 11783. [2021-06-05 23:24:49,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11783 states, 11782 states have (on average 3.3372093023255816) internal successors, (39319), 11782 states have internal predecessors, (39319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:24:49,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11783 states to 11783 states and 39319 transitions. [2021-06-05 23:24:49,771 INFO L78 Accepts]: Start accepts. Automaton has 11783 states and 39319 transitions. Word has length 36 [2021-06-05 23:24:49,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:24:49,771 INFO L482 AbstractCegarLoop]: Abstraction has 11783 states and 39319 transitions. [2021-06-05 23:24:49,771 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:24:49,771 INFO L276 IsEmpty]: Start isEmpty. Operand 11783 states and 39319 transitions. [2021-06-05 23:24:49,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 23:24:49,784 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:24:49,784 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:24:49,984 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1317,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:24:49,985 INFO L430 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:24:49,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:24:49,985 INFO L82 PathProgramCache]: Analyzing trace with hash -592687571, now seen corresponding path program 173 times [2021-06-05 23:24:49,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:24:49,985 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411760723] [2021-06-05 23:24:49,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:24:49,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:24:50,209 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:24:50,209 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:24:50,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411760723] [2021-06-05 23:24:50,209 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411760723] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:24:50,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545184711] [2021-06-05 23:24:50,209 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 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:24:50,232 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 23:24:50,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:24:50,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 23:24:50,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:24:50,730 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:24:50,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1545184711] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:24:50,730 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:24:50,730 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-06-05 23:24:50,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482814017] [2021-06-05 23:24:50,730 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 23:24:50,730 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:24:50,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 23:24:50,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=995, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 23:24:50,731 INFO L87 Difference]: Start difference. First operand 11783 states and 39319 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:24:52,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:24:52,531 INFO L93 Difference]: Finished difference Result 21473 states and 70039 transitions. [2021-06-05 23:24:52,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 23:24:52,532 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 23:24:52,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:24:52,564 INFO L225 Difference]: With dead ends: 21473 [2021-06-05 23:24:52,564 INFO L226 Difference]: Without dead ends: 21393 [2021-06-05 23:24:52,564 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 885 ImplicationChecksByTransitivity, 1435.1ms TimeCoverageRelationStatistics Valid=632, Invalid=2908, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 23:24:52,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21393 states. [2021-06-05 23:24:52,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21393 to 12081. [2021-06-05 23:24:52,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12081 states, 12080 states have (on average 3.3411423841059604) internal successors, (40361), 12080 states have internal predecessors, (40361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:24:52,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12081 states to 12081 states and 40361 transitions. [2021-06-05 23:24:52,811 INFO L78 Accepts]: Start accepts. Automaton has 12081 states and 40361 transitions. Word has length 36 [2021-06-05 23:24:52,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:24:52,811 INFO L482 AbstractCegarLoop]: Abstraction has 12081 states and 40361 transitions. [2021-06-05 23:24:52,811 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:24:52,811 INFO L276 IsEmpty]: Start isEmpty. Operand 12081 states and 40361 transitions. [2021-06-05 23:24:52,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 23:24:52,824 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:24:52,824 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:24:53,024 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 173 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1322 [2021-06-05 23:24:53,024 INFO L430 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:24:53,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:24:53,025 INFO L82 PathProgramCache]: Analyzing trace with hash -1033360067, now seen corresponding path program 174 times [2021-06-05 23:24:53,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:24:53,025 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060092974] [2021-06-05 23:24:53,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:24:53,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:24:53,281 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:24:53,281 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:24:53,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060092974] [2021-06-05 23:24:53,281 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060092974] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:24:53,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [214573390] [2021-06-05 23:24:53,281 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 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:24:53,304 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 23:24:53,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:24:53,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 23:24:53,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:24:53,813 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:24:53,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [214573390] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:24:53,813 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:24:53,813 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 35 [2021-06-05 23:24:53,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129456739] [2021-06-05 23:24:53,814 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 23:24:53,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:24:53,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 23:24:53,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=1073, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 23:24:53,814 INFO L87 Difference]: Start difference. First operand 12081 states and 40361 transitions. Second operand has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:24:58,754 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 48 [2021-06-05 23:24:59,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:24:59,213 INFO L93 Difference]: Finished difference Result 21275 states and 67476 transitions. [2021-06-05 23:24:59,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2021-06-05 23:24:59,213 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 23:24:59,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:24:59,243 INFO L225 Difference]: With dead ends: 21275 [2021-06-05 23:24:59,243 INFO L226 Difference]: Without dead ends: 21094 [2021-06-05 23:24:59,244 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4241 ImplicationChecksByTransitivity, 4424.7ms TimeCoverageRelationStatistics Valid=1636, Invalid=10796, Unknown=0, NotChecked=0, Total=12432 [2021-06-05 23:24:59,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21094 states. [2021-06-05 23:24:59,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21094 to 12167. [2021-06-05 23:24:59,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12167 states, 12166 states have (on average 3.3436626664474765) internal successors, (40679), 12166 states have internal predecessors, (40679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:24:59,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12167 states to 12167 states and 40679 transitions. [2021-06-05 23:24:59,473 INFO L78 Accepts]: Start accepts. Automaton has 12167 states and 40679 transitions. Word has length 36 [2021-06-05 23:24:59,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:24:59,473 INFO L482 AbstractCegarLoop]: Abstraction has 12167 states and 40679 transitions. [2021-06-05 23:24:59,473 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:24:59,473 INFO L276 IsEmpty]: Start isEmpty. Operand 12167 states and 40679 transitions. [2021-06-05 23:24:59,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 23:24:59,538 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:24:59,538 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:24:59,738 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 174 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1331 [2021-06-05 23:24:59,739 INFO L430 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:24:59,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:24:59,739 INFO L82 PathProgramCache]: Analyzing trace with hash -1545423999, now seen corresponding path program 175 times [2021-06-05 23:24:59,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:24:59,739 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238158512] [2021-06-05 23:24:59,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:24:59,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:25:00,080 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:25:00,080 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:25:00,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238158512] [2021-06-05 23:25:00,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238158512] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:25:00,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [639393416] [2021-06-05 23:25:00,080 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:25:00,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:25:00,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 23:25:00,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:25:00,707 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:25:00,708 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [639393416] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:25:00,708 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:25:00,708 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 35 [2021-06-05 23:25:00,708 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883935009] [2021-06-05 23:25:00,708 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 23:25:00,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:25:00,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 23:25:00,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=1059, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 23:25:00,708 INFO L87 Difference]: Start difference. First operand 12167 states and 40679 transitions. Second operand has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:25:04,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:25:04,007 INFO L93 Difference]: Finished difference Result 25095 states and 81293 transitions. [2021-06-05 23:25:04,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-06-05 23:25:04,008 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 23:25:04,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:25:04,045 INFO L225 Difference]: With dead ends: 25095 [2021-06-05 23:25:04,045 INFO L226 Difference]: Without dead ends: 24975 [2021-06-05 23:25:04,045 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2225 ImplicationChecksByTransitivity, 2968.2ms TimeCoverageRelationStatistics Valid=1208, Invalid=5764, Unknown=0, NotChecked=0, Total=6972 [2021-06-05 23:25:04,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24975 states. [2021-06-05 23:25:04,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24975 to 12153. [2021-06-05 23:25:04,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12153 states, 12152 states have (on average 3.339121132323897) internal successors, (40577), 12152 states have internal predecessors, (40577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:25:04,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12153 states to 12153 states and 40577 transitions. [2021-06-05 23:25:04,299 INFO L78 Accepts]: Start accepts. Automaton has 12153 states and 40577 transitions. Word has length 36 [2021-06-05 23:25:04,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:25:04,299 INFO L482 AbstractCegarLoop]: Abstraction has 12153 states and 40577 transitions. [2021-06-05 23:25:04,299 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:25:04,299 INFO L276 IsEmpty]: Start isEmpty. Operand 12153 states and 40577 transitions. [2021-06-05 23:25:04,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 23:25:04,313 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:25:04,313 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:25:04,513 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1335 [2021-06-05 23:25:04,513 INFO L430 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:25:04,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:25:04,514 INFO L82 PathProgramCache]: Analyzing trace with hash -820386559, now seen corresponding path program 176 times [2021-06-05 23:25:04,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:25:04,514 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291200123] [2021-06-05 23:25:04,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:25:04,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:25:04,858 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:25:04,859 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:25:04,859 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291200123] [2021-06-05 23:25:04,859 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291200123] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:25:04,859 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [159520526] [2021-06-05 23:25:04,859 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 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:25:04,881 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:25:04,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:25:04,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 23:25:04,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:25:05,461 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:25:05,462 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [159520526] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:25:05,462 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:25:05,462 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 33 [2021-06-05 23:25:05,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490969967] [2021-06-05 23:25:05,462 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 23:25:05,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:25:05,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 23:25:05,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=943, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 23:25:05,462 INFO L87 Difference]: Start difference. First operand 12153 states and 40577 transitions. Second operand has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:25:07,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:25:07,699 INFO L93 Difference]: Finished difference Result 20996 states and 68664 transitions. [2021-06-05 23:25:07,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-05 23:25:07,700 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 23:25:07,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:25:07,729 INFO L225 Difference]: With dead ends: 20996 [2021-06-05 23:25:07,729 INFO L226 Difference]: Without dead ends: 20876 [2021-06-05 23:25:07,729 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 945 ImplicationChecksByTransitivity, 1931.9ms TimeCoverageRelationStatistics Valid=600, Invalid=2940, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 23:25:07,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20876 states. [2021-06-05 23:25:07,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20876 to 12203. [2021-06-05 23:25:07,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12203 states, 12202 states have (on average 3.3387149647598755) internal successors, (40739), 12202 states have internal predecessors, (40739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:25:07,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12203 states to 12203 states and 40739 transitions. [2021-06-05 23:25:07,952 INFO L78 Accepts]: Start accepts. Automaton has 12203 states and 40739 transitions. Word has length 36 [2021-06-05 23:25:07,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:25:07,952 INFO L482 AbstractCegarLoop]: Abstraction has 12203 states and 40739 transitions. [2021-06-05 23:25:07,952 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:25:07,952 INFO L276 IsEmpty]: Start isEmpty. Operand 12203 states and 40739 transitions. [2021-06-05 23:25:07,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 23:25:07,966 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:25:07,966 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:25:08,166 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1342 [2021-06-05 23:25:08,167 INFO L430 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:25:08,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:25:08,167 INFO L82 PathProgramCache]: Analyzing trace with hash 1901659413, now seen corresponding path program 177 times [2021-06-05 23:25:08,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:25:08,167 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495791549] [2021-06-05 23:25:08,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:25:08,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:25:08,429 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:25:08,429 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:25:08,429 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495791549] [2021-06-05 23:25:08,429 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495791549] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:25:08,429 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920140772] [2021-06-05 23:25:08,429 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:25:08,454 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 23:25:08,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:25:08,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 23:25:08,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:25:08,964 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:25:08,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [920140772] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:25:08,964 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:25:08,964 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 35 [2021-06-05 23:25:08,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193418211] [2021-06-05 23:25:08,964 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 23:25:08,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:25:08,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 23:25:08,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=1097, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 23:25:08,964 INFO L87 Difference]: Start difference. First operand 12203 states and 40739 transitions. Second operand has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:25:13,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:25:13,118 INFO L93 Difference]: Finished difference Result 16381 states and 52813 transitions. [2021-06-05 23:25:13,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2021-06-05 23:25:13,119 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 23:25:13,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:25:13,142 INFO L225 Difference]: With dead ends: 16381 [2021-06-05 23:25:13,142 INFO L226 Difference]: Without dead ends: 16185 [2021-06-05 23:25:13,143 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3092 ImplicationChecksByTransitivity, 3540.2ms TimeCoverageRelationStatistics Valid=1118, Invalid=8584, Unknown=0, NotChecked=0, Total=9702 [2021-06-05 23:25:13,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16185 states. [2021-06-05 23:25:13,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16185 to 12258. [2021-06-05 23:25:13,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12258 states, 12257 states have (on average 3.3400505833401324) internal successors, (40939), 12257 states have internal predecessors, (40939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:25:13,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12258 states to 12258 states and 40939 transitions. [2021-06-05 23:25:13,347 INFO L78 Accepts]: Start accepts. Automaton has 12258 states and 40939 transitions. Word has length 36 [2021-06-05 23:25:13,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:25:13,347 INFO L482 AbstractCegarLoop]: Abstraction has 12258 states and 40939 transitions. [2021-06-05 23:25:13,347 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:25:13,347 INFO L276 IsEmpty]: Start isEmpty. Operand 12258 states and 40939 transitions. [2021-06-05 23:25:13,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 23:25:13,361 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:25:13,361 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:25:13,564 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1349,177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:25:13,565 INFO L430 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:25:13,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:25:13,565 INFO L82 PathProgramCache]: Analyzing trace with hash -57082179, now seen corresponding path program 178 times [2021-06-05 23:25:13,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:25:13,565 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459058821] [2021-06-05 23:25:13,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:25:13,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:25:13,835 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:25:13,835 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:25:13,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459058821] [2021-06-05 23:25:13,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459058821] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:25:13,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1735745382] [2021-06-05 23:25:13,835 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:25:13,857 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:25:13,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:25:13,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 23:25:13,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:25:14,387 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:25:14,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1735745382] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:25:14,388 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:25:14,388 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2021-06-05 23:25:14,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862558299] [2021-06-05 23:25:14,388 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 23:25:14,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:25:14,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 23:25:14,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=1151, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 23:25:14,388 INFO L87 Difference]: Start difference. First operand 12258 states and 40939 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:25:17,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:25:17,513 INFO L93 Difference]: Finished difference Result 15245 states and 49509 transitions. [2021-06-05 23:25:17,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-06-05 23:25:17,513 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 23:25:17,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:25:17,535 INFO L225 Difference]: With dead ends: 15245 [2021-06-05 23:25:17,536 INFO L226 Difference]: Without dead ends: 15084 [2021-06-05 23:25:17,536 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2241 ImplicationChecksByTransitivity, 2581.8ms TimeCoverageRelationStatistics Valid=983, Invalid=6327, Unknown=0, NotChecked=0, Total=7310 [2021-06-05 23:25:17,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15084 states. [2021-06-05 23:25:17,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15084 to 12278. [2021-06-05 23:25:17,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12278 states, 12277 states have (on average 3.3397409790665473) internal successors, (41002), 12277 states have internal predecessors, (41002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:25:17,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12278 states to 12278 states and 41002 transitions. [2021-06-05 23:25:17,730 INFO L78 Accepts]: Start accepts. Automaton has 12278 states and 41002 transitions. Word has length 36 [2021-06-05 23:25:17,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:25:17,730 INFO L482 AbstractCegarLoop]: Abstraction has 12278 states and 41002 transitions. [2021-06-05 23:25:17,730 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:25:17,730 INFO L276 IsEmpty]: Start isEmpty. Operand 12278 states and 41002 transitions. [2021-06-05 23:25:17,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 23:25:17,744 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:25:17,744 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:25:17,944 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1353 [2021-06-05 23:25:17,944 INFO L430 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:25:17,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:25:17,945 INFO L82 PathProgramCache]: Analyzing trace with hash 660485821, now seen corresponding path program 179 times [2021-06-05 23:25:17,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:25:17,945 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280774336] [2021-06-05 23:25:17,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:25:17,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:25:18,226 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:25:18,227 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:25:18,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280774336] [2021-06-05 23:25:18,227 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280774336] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:25:18,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308029740] [2021-06-05 23:25:18,227 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:25:18,251 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 23:25:18,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:25:18,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 23:25:18,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:25:18,787 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:25:18,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [308029740] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:25:18,787 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:25:18,787 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2021-06-05 23:25:18,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794248382] [2021-06-05 23:25:18,787 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 23:25:18,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:25:18,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 23:25:18,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=1130, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 23:25:18,788 INFO L87 Difference]: Start difference. First operand 12278 states and 41002 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:25:22,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:25:22,568 INFO L93 Difference]: Finished difference Result 19580 states and 62833 transitions. [2021-06-05 23:25:22,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2021-06-05 23:25:22,568 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 23:25:22,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:25:22,597 INFO L225 Difference]: With dead ends: 19580 [2021-06-05 23:25:22,598 INFO L226 Difference]: Without dead ends: 19369 [2021-06-05 23:25:22,598 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3025 ImplicationChecksByTransitivity, 3214.5ms TimeCoverageRelationStatistics Valid=1359, Invalid=7761, Unknown=0, NotChecked=0, Total=9120 [2021-06-05 23:25:22,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19369 states. [2021-06-05 23:25:22,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19369 to 12282. [2021-06-05 23:25:22,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12282 states, 12281 states have (on average 3.3397931764514293) internal successors, (41016), 12281 states have internal predecessors, (41016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:25:22,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12282 states to 12282 states and 41016 transitions. [2021-06-05 23:25:22,828 INFO L78 Accepts]: Start accepts. Automaton has 12282 states and 41016 transitions. Word has length 36 [2021-06-05 23:25:22,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:25:22,828 INFO L482 AbstractCegarLoop]: Abstraction has 12282 states and 41016 transitions. [2021-06-05 23:25:22,829 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:25:22,829 INFO L276 IsEmpty]: Start isEmpty. Operand 12282 states and 41016 transitions. [2021-06-05 23:25:22,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 23:25:22,842 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:25:22,842 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:25:23,042 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1357,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:25:23,042 INFO L430 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:25:23,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:25:23,042 INFO L82 PathProgramCache]: Analyzing trace with hash -1158724095, now seen corresponding path program 180 times [2021-06-05 23:25:23,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:25:23,043 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125120792] [2021-06-05 23:25:23,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:25:23,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:25:23,418 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:25:23,418 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:25:23,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125120792] [2021-06-05 23:25:23,418 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125120792] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:25:23,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1090311635] [2021-06-05 23:25:23,418 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:25:23,442 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 23:25:23,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:25:23,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 23:25:23,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:25:23,924 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:25:23,924 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1090311635] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:25:23,924 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:25:23,924 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 33 [2021-06-05 23:25:23,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345661527] [2021-06-05 23:25:23,925 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 23:25:23,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:25:23,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 23:25:23,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=958, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 23:25:23,925 INFO L87 Difference]: Start difference. First operand 12282 states and 41016 transitions. Second operand has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:25:26,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:25:26,251 INFO L93 Difference]: Finished difference Result 17885 states and 58750 transitions. [2021-06-05 23:25:26,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 23:25:26,251 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 23:25:26,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:25:26,278 INFO L225 Difference]: With dead ends: 17885 [2021-06-05 23:25:26,278 INFO L226 Difference]: Without dead ends: 17756 [2021-06-05 23:25:26,278 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 913 ImplicationChecksByTransitivity, 1931.3ms TimeCoverageRelationStatistics Valid=535, Invalid=3125, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 23:25:26,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17756 states. [2021-06-05 23:25:26,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17756 to 12282. [2021-06-05 23:25:26,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12282 states, 12281 states have (on average 3.339386043481801) internal successors, (41011), 12281 states have internal predecessors, (41011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:25:26,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12282 states to 12282 states and 41011 transitions. [2021-06-05 23:25:26,493 INFO L78 Accepts]: Start accepts. Automaton has 12282 states and 41011 transitions. Word has length 36 [2021-06-05 23:25:26,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:25:26,493 INFO L482 AbstractCegarLoop]: Abstraction has 12282 states and 41011 transitions. [2021-06-05 23:25:26,493 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:25:26,493 INFO L276 IsEmpty]: Start isEmpty. Operand 12282 states and 41011 transitions. [2021-06-05 23:25:26,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 23:25:26,507 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:25:26,507 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:25:26,708 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1361,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:25:26,708 INFO L430 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:25:26,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:25:26,708 INFO L82 PathProgramCache]: Analyzing trace with hash -689852995, now seen corresponding path program 181 times [2021-06-05 23:25:26,708 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:25:26,708 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57951453] [2021-06-05 23:25:26,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:25:26,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:25:26,986 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:25:26,986 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:25:26,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57951453] [2021-06-05 23:25:26,986 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [57951453] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:25:26,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771930204] [2021-06-05 23:25:26,986 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:25:27,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:25:27,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 23:25:27,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:25:27,528 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:25:27,528 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1771930204] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:25:27,528 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:25:27,529 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-06-05 23:25:27,529 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142392163] [2021-06-05 23:25:27,529 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 23:25:27,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:25:27,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 23:25:27,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=997, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 23:25:27,529 INFO L87 Difference]: Start difference. First operand 12282 states and 41011 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:25:29,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:25:29,367 INFO L93 Difference]: Finished difference Result 23065 states and 75742 transitions. [2021-06-05 23:25:29,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 23:25:29,367 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 23:25:29,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:25:29,402 INFO L225 Difference]: With dead ends: 23065 [2021-06-05 23:25:29,402 INFO L226 Difference]: Without dead ends: 22985 [2021-06-05 23:25:29,403 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1081 ImplicationChecksByTransitivity, 1692.1ms TimeCoverageRelationStatistics Valid=751, Invalid=3281, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 23:25:29,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22985 states. [2021-06-05 23:25:29,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22985 to 12934. [2021-06-05 23:25:29,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12934 states, 12933 states have (on average 3.3547514111188432) internal successors, (43387), 12933 states have internal predecessors, (43387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:25:29,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12934 states to 12934 states and 43387 transitions. [2021-06-05 23:25:29,683 INFO L78 Accepts]: Start accepts. Automaton has 12934 states and 43387 transitions. Word has length 36 [2021-06-05 23:25:29,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:25:29,683 INFO L482 AbstractCegarLoop]: Abstraction has 12934 states and 43387 transitions. [2021-06-05 23:25:29,683 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:25:29,683 INFO L276 IsEmpty]: Start isEmpty. Operand 12934 states and 43387 transitions. [2021-06-05 23:25:29,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 23:25:29,697 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:25:29,697 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:25:29,897 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 181 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1366 [2021-06-05 23:25:29,897 INFO L430 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:25:29,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:25:29,898 INFO L82 PathProgramCache]: Analyzing trace with hash 162276749, now seen corresponding path program 182 times [2021-06-05 23:25:29,898 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:25:29,898 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937980312] [2021-06-05 23:25:29,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:25:29,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:25:30,138 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:25:30,138 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:25:30,138 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937980312] [2021-06-05 23:25:30,138 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937980312] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:25:30,138 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1568220488] [2021-06-05 23:25:30,138 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:25:30,161 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:25:30,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:25:30,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 23:25:30,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:25:30,776 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:25:30,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1568220488] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:25:30,776 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:25:30,776 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 33 [2021-06-05 23:25:30,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755665661] [2021-06-05 23:25:30,776 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 23:25:30,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:25:30,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 23:25:30,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=956, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 23:25:30,776 INFO L87 Difference]: Start difference. First operand 12934 states and 43387 transitions. Second operand has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:25:32,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:25:32,325 INFO L93 Difference]: Finished difference Result 15480 states and 50971 transitions. [2021-06-05 23:25:32,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 23:25:32,325 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 23:25:32,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:25:32,348 INFO L225 Difference]: With dead ends: 15480 [2021-06-05 23:25:32,348 INFO L226 Difference]: Without dead ends: 15366 [2021-06-05 23:25:32,348 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 629 ImplicationChecksByTransitivity, 1343.9ms TimeCoverageRelationStatistics Valid=467, Invalid=2395, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 23:25:32,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15366 states. [2021-06-05 23:25:32,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15366 to 12978. [2021-06-05 23:25:32,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12978 states, 12977 states have (on average 3.354165061262233) internal successors, (43527), 12977 states have internal predecessors, (43527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:25:32,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12978 states to 12978 states and 43527 transitions. [2021-06-05 23:25:32,560 INFO L78 Accepts]: Start accepts. Automaton has 12978 states and 43527 transitions. Word has length 36 [2021-06-05 23:25:32,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:25:32,560 INFO L482 AbstractCegarLoop]: Abstraction has 12978 states and 43527 transitions. [2021-06-05 23:25:32,560 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:25:32,560 INFO L276 IsEmpty]: Start isEmpty. Operand 12978 states and 43527 transitions. [2021-06-05 23:25:32,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 23:25:32,574 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:25:32,574 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:25:32,774 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1380,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:25:32,774 INFO L430 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:25:32,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:25:32,775 INFO L82 PathProgramCache]: Analyzing trace with hash 1013868853, now seen corresponding path program 183 times [2021-06-05 23:25:32,775 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:25:32,775 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741846363] [2021-06-05 23:25:32,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:25:32,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:25:33,087 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:25:33,087 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:25:33,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741846363] [2021-06-05 23:25:33,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741846363] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:25:33,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035685433] [2021-06-05 23:25:33,087 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:25:33,111 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 23:25:33,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:25:33,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 23:25:33,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:25:33,677 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:25:33,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1035685433] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:25:33,677 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:25:33,677 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 33 [2021-06-05 23:25:33,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919654121] [2021-06-05 23:25:33,677 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 23:25:33,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:25:33,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 23:25:33,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=936, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 23:25:33,678 INFO L87 Difference]: Start difference. First operand 12978 states and 43527 transitions. Second operand has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:25:35,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:25:35,152 INFO L93 Difference]: Finished difference Result 15292 states and 50593 transitions. [2021-06-05 23:25:35,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 23:25:35,152 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 23:25:35,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:25:35,174 INFO L225 Difference]: With dead ends: 15292 [2021-06-05 23:25:35,174 INFO L226 Difference]: Without dead ends: 15172 [2021-06-05 23:25:35,174 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 641 ImplicationChecksByTransitivity, 1482.6ms TimeCoverageRelationStatistics Valid=510, Invalid=2352, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 23:25:35,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15172 states. [2021-06-05 23:25:35,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15172 to 12978. [2021-06-05 23:25:35,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12978 states, 12977 states have (on average 3.354165061262233) internal successors, (43527), 12977 states have internal predecessors, (43527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:25:35,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12978 states to 12978 states and 43527 transitions. [2021-06-05 23:25:35,373 INFO L78 Accepts]: Start accepts. Automaton has 12978 states and 43527 transitions. Word has length 36 [2021-06-05 23:25:35,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:25:35,373 INFO L482 AbstractCegarLoop]: Abstraction has 12978 states and 43527 transitions. [2021-06-05 23:25:35,373 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:25:35,373 INFO L276 IsEmpty]: Start isEmpty. Operand 12978 states and 43527 transitions. [2021-06-05 23:25:35,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 23:25:35,387 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:25:35,387 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:25:35,587 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1390 [2021-06-05 23:25:35,588 INFO L430 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:25:35,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:25:35,588 INFO L82 PathProgramCache]: Analyzing trace with hash -559052471, now seen corresponding path program 184 times [2021-06-05 23:25:35,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:25:35,588 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84250847] [2021-06-05 23:25:35,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:25:35,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:25:35,814 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:25:35,814 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:25:35,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84250847] [2021-06-05 23:25:35,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84250847] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:25:35,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813910830] [2021-06-05 23:25:35,814 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:25:35,837 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:25:35,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:25:35,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 23:25:35,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:25:36,364 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:25:36,364 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [813910830] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:25:36,364 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:25:36,364 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2021-06-05 23:25:36,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153769715] [2021-06-05 23:25:36,365 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 23:25:36,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:25:36,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 23:25:36,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=1129, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 23:25:36,365 INFO L87 Difference]: Start difference. First operand 12978 states and 43527 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:25:38,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:25:38,418 INFO L93 Difference]: Finished difference Result 14778 states and 48554 transitions. [2021-06-05 23:25:38,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-05 23:25:38,418 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 23:25:38,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:25:38,438 INFO L225 Difference]: With dead ends: 14778 [2021-06-05 23:25:38,438 INFO L226 Difference]: Without dead ends: 14518 [2021-06-05 23:25:38,438 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1188 ImplicationChecksByTransitivity, 1658.9ms TimeCoverageRelationStatistics Valid=694, Invalid=3862, Unknown=0, NotChecked=0, Total=4556 [2021-06-05 23:25:38,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14518 states. [2021-06-05 23:25:38,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14518 to 13036. [2021-06-05 23:25:38,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13036 states, 13035 states have (on average 3.353049482163406) internal successors, (43707), 13035 states have internal predecessors, (43707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:25:38,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13036 states to 13036 states and 43707 transitions. [2021-06-05 23:25:38,635 INFO L78 Accepts]: Start accepts. Automaton has 13036 states and 43707 transitions. Word has length 36 [2021-06-05 23:25:38,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:25:38,635 INFO L482 AbstractCegarLoop]: Abstraction has 13036 states and 43707 transitions. [2021-06-05 23:25:38,635 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:25:38,635 INFO L276 IsEmpty]: Start isEmpty. Operand 13036 states and 43707 transitions. [2021-06-05 23:25:38,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 23:25:38,650 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:25:38,650 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:25:38,850 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 184 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1397 [2021-06-05 23:25:38,850 INFO L430 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:25:38,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:25:38,851 INFO L82 PathProgramCache]: Analyzing trace with hash 433441093, now seen corresponding path program 185 times [2021-06-05 23:25:38,851 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:25:38,851 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134547045] [2021-06-05 23:25:38,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:25:38,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:25:39,071 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:25:39,071 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:25:39,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134547045] [2021-06-05 23:25:39,071 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134547045] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:25:39,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167603052] [2021-06-05 23:25:39,071 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:25:39,094 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 23:25:39,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:25:39,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 23:25:39,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:25:39,620 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:25:39,620 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1167603052] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:25:39,620 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:25:39,620 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2021-06-05 23:25:39,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215160698] [2021-06-05 23:25:39,620 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 23:25:39,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:25:39,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 23:25:39,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=1121, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 23:25:39,621 INFO L87 Difference]: Start difference. First operand 13036 states and 43707 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:25:41,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:25:41,986 INFO L93 Difference]: Finished difference Result 16081 states and 52501 transitions. [2021-06-05 23:25:41,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-05 23:25:41,986 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 23:25:41,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:25:42,007 INFO L225 Difference]: With dead ends: 16081 [2021-06-05 23:25:42,007 INFO L226 Difference]: Without dead ends: 15831 [2021-06-05 23:25:42,007 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1415 ImplicationChecksByTransitivity, 1862.0ms TimeCoverageRelationStatistics Valid=847, Invalid=4555, Unknown=0, NotChecked=0, Total=5402 [2021-06-05 23:25:42,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15831 states. [2021-06-05 23:25:42,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15831 to 13054. [2021-06-05 23:25:42,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13054 states, 13053 states have (on average 3.3539416226154906) internal successors, (43779), 13053 states have internal predecessors, (43779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:25:42,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13054 states to 13054 states and 43779 transitions. [2021-06-05 23:25:42,208 INFO L78 Accepts]: Start accepts. Automaton has 13054 states and 43779 transitions. Word has length 36 [2021-06-05 23:25:42,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:25:42,208 INFO L482 AbstractCegarLoop]: Abstraction has 13054 states and 43779 transitions. [2021-06-05 23:25:42,208 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:25:42,208 INFO L276 IsEmpty]: Start isEmpty. Operand 13054 states and 43779 transitions. [2021-06-05 23:25:42,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 23:25:42,224 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:25:42,224 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:25:42,424 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1401 [2021-06-05 23:25:42,425 INFO L430 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:25:42,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:25:42,425 INFO L82 PathProgramCache]: Analyzing trace with hash 1151009093, now seen corresponding path program 186 times [2021-06-05 23:25:42,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:25:42,425 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864320384] [2021-06-05 23:25:42,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:25:42,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:25:42,656 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:25:42,656 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:25:42,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864320384] [2021-06-05 23:25:42,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864320384] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:25:42,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1116394574] [2021-06-05 23:25:42,656 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:25:42,679 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 23:25:42,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:25:42,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 23:25:42,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:25:43,165 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:25:43,165 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1116394574] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:25:43,166 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:25:43,166 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 35 [2021-06-05 23:25:43,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502311962] [2021-06-05 23:25:43,166 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 23:25:43,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:25:43,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 23:25:43,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=234, Invalid=1026, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 23:25:43,166 INFO L87 Difference]: Start difference. First operand 13054 states and 43779 transitions. Second operand has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:25:45,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:25:45,636 INFO L93 Difference]: Finished difference Result 20104 states and 65043 transitions. [2021-06-05 23:25:45,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-06-05 23:25:45,636 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 23:25:45,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:25:45,663 INFO L225 Difference]: With dead ends: 20104 [2021-06-05 23:25:45,663 INFO L226 Difference]: Without dead ends: 19902 [2021-06-05 23:25:45,663 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1587 ImplicationChecksByTransitivity, 2020.2ms TimeCoverageRelationStatistics Valid=1030, Invalid=4520, Unknown=0, NotChecked=0, Total=5550 [2021-06-05 23:25:45,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19902 states. [2021-06-05 23:25:45,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19902 to 13034. [2021-06-05 23:25:45,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13034 states, 13033 states have (on average 3.3529502033300083) internal successors, (43699), 13033 states have internal predecessors, (43699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:25:45,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13034 states to 13034 states and 43699 transitions. [2021-06-05 23:25:45,895 INFO L78 Accepts]: Start accepts. Automaton has 13034 states and 43699 transitions. Word has length 36 [2021-06-05 23:25:45,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:25:45,895 INFO L482 AbstractCegarLoop]: Abstraction has 13034 states and 43699 transitions. [2021-06-05 23:25:45,895 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:25:45,895 INFO L276 IsEmpty]: Start isEmpty. Operand 13034 states and 43699 transitions. [2021-06-05 23:25:45,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 23:25:45,910 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:25:45,910 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:25:46,111 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1405,186 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:25:46,111 INFO L430 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:25:46,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:25:46,111 INFO L82 PathProgramCache]: Analyzing trace with hash 1777173233, now seen corresponding path program 187 times [2021-06-05 23:25:46,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:25:46,111 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632111012] [2021-06-05 23:25:46,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:25:46,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:25:46,330 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:25:46,330 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:25:46,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632111012] [2021-06-05 23:25:46,330 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632111012] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:25:46,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1484464420] [2021-06-05 23:25:46,330 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:25:46,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:25:46,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 23:25:46,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:25:46,878 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:25:46,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1484464420] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:25:46,878 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:25:46,878 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2021-06-05 23:25:46,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797262659] [2021-06-05 23:25:46,878 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 23:25:46,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:25:46,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 23:25:46,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=1123, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 23:25:46,879 INFO L87 Difference]: Start difference. First operand 13034 states and 43699 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:25:48,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:25:48,785 INFO L93 Difference]: Finished difference Result 15744 states and 51494 transitions. [2021-06-05 23:25:48,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-05 23:25:48,786 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 23:25:48,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:25:48,808 INFO L225 Difference]: With dead ends: 15744 [2021-06-05 23:25:48,808 INFO L226 Difference]: Without dead ends: 15514 [2021-06-05 23:25:48,809 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1199 ImplicationChecksByTransitivity, 1655.6ms TimeCoverageRelationStatistics Valid=764, Invalid=3928, Unknown=0, NotChecked=0, Total=4692 [2021-06-05 23:25:48,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15514 states. [2021-06-05 23:25:49,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15514 to 13077. [2021-06-05 23:25:49,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13077 states, 13076 states have (on average 3.353395533802386) internal successors, (43849), 13076 states have internal predecessors, (43849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:25:49,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13077 states to 13077 states and 43849 transitions. [2021-06-05 23:25:49,066 INFO L78 Accepts]: Start accepts. Automaton has 13077 states and 43849 transitions. Word has length 36 [2021-06-05 23:25:49,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:25:49,066 INFO L482 AbstractCegarLoop]: Abstraction has 13077 states and 43849 transitions. [2021-06-05 23:25:49,066 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:25:49,066 INFO L276 IsEmpty]: Start isEmpty. Operand 13077 states and 43849 transitions. [2021-06-05 23:25:49,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 23:25:49,083 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:25:49,083 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:25:49,283 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1409,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:25:49,283 INFO L430 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:25:49,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:25:49,284 INFO L82 PathProgramCache]: Analyzing trace with hash -1800226063, now seen corresponding path program 188 times [2021-06-05 23:25:49,284 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:25:49,284 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463608614] [2021-06-05 23:25:49,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:25:49,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:25:49,525 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:25:49,525 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:25:49,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463608614] [2021-06-05 23:25:49,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463608614] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:25:49,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [970673839] [2021-06-05 23:25:49,525 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:25:49,547 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:25:49,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:25:49,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 23:25:49,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:25:50,032 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:25:50,032 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [970673839] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:25:50,032 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:25:50,032 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 35 [2021-06-05 23:25:50,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680452881] [2021-06-05 23:25:50,033 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 23:25:50,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:25:50,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 23:25:50,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=1027, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 23:25:50,033 INFO L87 Difference]: Start difference. First operand 13077 states and 43849 transitions. Second operand has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:25:52,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:25:52,484 INFO L93 Difference]: Finished difference Result 20294 states and 65481 transitions. [2021-06-05 23:25:52,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-06-05 23:25:52,484 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 23:25:52,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:25:52,515 INFO L225 Difference]: With dead ends: 20294 [2021-06-05 23:25:52,515 INFO L226 Difference]: Without dead ends: 20086 [2021-06-05 23:25:52,515 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1592 ImplicationChecksByTransitivity, 1983.3ms TimeCoverageRelationStatistics Valid=1022, Invalid=4528, Unknown=0, NotChecked=0, Total=5550 [2021-06-05 23:25:52,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20086 states. [2021-06-05 23:25:52,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20086 to 13046. [2021-06-05 23:25:52,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13046 states, 13045 states have (on average 3.3526255270218472) internal successors, (43735), 13045 states have internal predecessors, (43735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:25:52,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13046 states to 13046 states and 43735 transitions. [2021-06-05 23:25:52,791 INFO L78 Accepts]: Start accepts. Automaton has 13046 states and 43735 transitions. Word has length 36 [2021-06-05 23:25:52,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:25:52,792 INFO L482 AbstractCegarLoop]: Abstraction has 13046 states and 43735 transitions. [2021-06-05 23:25:52,792 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:25:52,792 INFO L276 IsEmpty]: Start isEmpty. Operand 13046 states and 43735 transitions. [2021-06-05 23:25:52,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 23:25:52,807 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:25:52,807 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:25:53,012 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1413 [2021-06-05 23:25:53,013 INFO L430 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:25:53,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:25:53,013 INFO L82 PathProgramCache]: Analyzing trace with hash 1099081613, now seen corresponding path program 189 times [2021-06-05 23:25:53,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:25:53,013 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13235594] [2021-06-05 23:25:53,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:25:53,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:25:53,258 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:25:53,258 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:25:53,258 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13235594] [2021-06-05 23:25:53,258 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13235594] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:25:53,258 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1760358065] [2021-06-05 23:25:53,258 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:25:53,280 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 23:25:53,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:25:53,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 23:25:53,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:25:53,744 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:25:53,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1760358065] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:25:53,744 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:25:53,744 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 33 [2021-06-05 23:25:53,744 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933229639] [2021-06-05 23:25:53,744 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 23:25:53,745 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:25:53,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 23:25:53,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=950, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 23:25:53,745 INFO L87 Difference]: Start difference. First operand 13046 states and 43735 transitions. Second operand has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:25:55,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:25:55,257 INFO L93 Difference]: Finished difference Result 15141 states and 49852 transitions. [2021-06-05 23:25:55,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 23:25:55,257 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 23:25:55,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:25:55,279 INFO L225 Difference]: With dead ends: 15141 [2021-06-05 23:25:55,279 INFO L226 Difference]: Without dead ends: 14948 [2021-06-05 23:25:55,279 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 790 ImplicationChecksByTransitivity, 1409.8ms TimeCoverageRelationStatistics Valid=542, Invalid=2880, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 23:25:55,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14948 states. [2021-06-05 23:25:55,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14948 to 13054. [2021-06-05 23:25:55,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13054 states, 13053 states have (on average 3.3528690722439287) internal successors, (43765), 13053 states have internal predecessors, (43765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:25:55,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13054 states to 13054 states and 43765 transitions. [2021-06-05 23:25:55,486 INFO L78 Accepts]: Start accepts. Automaton has 13054 states and 43765 transitions. Word has length 36 [2021-06-05 23:25:55,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:25:55,486 INFO L482 AbstractCegarLoop]: Abstraction has 13054 states and 43765 transitions. [2021-06-05 23:25:55,486 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:25:55,486 INFO L276 IsEmpty]: Start isEmpty. Operand 13054 states and 43765 transitions. [2021-06-05 23:25:55,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 23:25:55,501 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:25:55,502 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:25:55,704 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1417,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:25:55,705 INFO L430 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:25:55,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:25:55,705 INFO L82 PathProgramCache]: Analyzing trace with hash 977665181, now seen corresponding path program 190 times [2021-06-05 23:25:55,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:25:55,705 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916075687] [2021-06-05 23:25:55,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:25:55,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:25:55,958 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:25:55,958 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:25:55,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916075687] [2021-06-05 23:25:55,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [916075687] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:25:55,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828245378] [2021-06-05 23:25:55,958 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:25:56,040 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:25:56,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:25:56,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 23:25:56,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:25:56,633 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:25:56,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1828245378] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:25:56,634 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:25:56,634 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-06-05 23:25:56,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630628391] [2021-06-05 23:25:56,634 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 23:25:56,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:25:56,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 23:25:56,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=1010, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 23:25:56,634 INFO L87 Difference]: Start difference. First operand 13054 states and 43765 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:25:58,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:25:58,245 INFO L93 Difference]: Finished difference Result 16525 states and 54476 transitions. [2021-06-05 23:25:58,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 23:25:58,246 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 23:25:58,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:25:58,269 INFO L225 Difference]: With dead ends: 16525 [2021-06-05 23:25:58,270 INFO L226 Difference]: Without dead ends: 16430 [2021-06-05 23:25:58,270 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 786 ImplicationChecksByTransitivity, 1488.0ms TimeCoverageRelationStatistics Valid=569, Invalid=2623, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 23:25:58,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16430 states. [2021-06-05 23:25:58,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16430 to 13084. [2021-06-05 23:25:58,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13084 states, 13083 states have (on average 3.352671405640908) internal successors, (43863), 13083 states have internal predecessors, (43863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:25:58,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13084 states to 13084 states and 43863 transitions. [2021-06-05 23:25:58,480 INFO L78 Accepts]: Start accepts. Automaton has 13084 states and 43863 transitions. Word has length 36 [2021-06-05 23:25:58,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:25:58,480 INFO L482 AbstractCegarLoop]: Abstraction has 13084 states and 43863 transitions. [2021-06-05 23:25:58,481 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:25:58,481 INFO L276 IsEmpty]: Start isEmpty. Operand 13084 states and 43863 transitions. [2021-06-05 23:25:58,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 23:25:58,496 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:25:58,496 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:25:58,696 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1422 [2021-06-05 23:25:58,696 INFO L430 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:25:58,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:25:58,696 INFO L82 PathProgramCache]: Analyzing trace with hash 1899367321, now seen corresponding path program 191 times [2021-06-05 23:25:58,696 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:25:58,697 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815718981] [2021-06-05 23:25:58,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:25:58,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:25:58,964 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:25:58,964 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:25:58,964 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815718981] [2021-06-05 23:25:58,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1815718981] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:25:58,964 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [531592374] [2021-06-05 23:25:58,965 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 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:25:58,989 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 23:25:58,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:25:58,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 23:25:58,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:25:59,590 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:25:59,591 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [531592374] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:25:59,591 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:25:59,591 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-06-05 23:25:59,591 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180849618] [2021-06-05 23:25:59,591 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 23:25:59,591 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:25:59,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 23:25:59,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=995, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 23:25:59,591 INFO L87 Difference]: Start difference. First operand 13084 states and 43863 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:26:01,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:26:01,002 INFO L93 Difference]: Finished difference Result 17451 states and 57232 transitions. [2021-06-05 23:26:01,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 23:26:01,002 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 23:26:01,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:26:01,027 INFO L225 Difference]: With dead ends: 17451 [2021-06-05 23:26:01,027 INFO L226 Difference]: Without dead ends: 17371 [2021-06-05 23:26:01,027 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 636 ImplicationChecksByTransitivity, 1336.5ms TimeCoverageRelationStatistics Valid=528, Invalid=2124, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 23:26:01,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17371 states. [2021-06-05 23:26:01,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17371 to 13158. [2021-06-05 23:26:01,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13158 states, 13157 states have (on average 3.3515999087937978) internal successors, (44097), 13157 states have internal predecessors, (44097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:26:01,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13158 states to 13158 states and 44097 transitions. [2021-06-05 23:26:01,247 INFO L78 Accepts]: Start accepts. Automaton has 13158 states and 44097 transitions. Word has length 36 [2021-06-05 23:26:01,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:26:01,247 INFO L482 AbstractCegarLoop]: Abstraction has 13158 states and 44097 transitions. [2021-06-05 23:26:01,247 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:26:01,247 INFO L276 IsEmpty]: Start isEmpty. Operand 13158 states and 44097 transitions. [2021-06-05 23:26:01,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 23:26:01,263 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:26:01,264 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:26:01,464 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1429,191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:26:01,464 INFO L430 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:26:01,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:26:01,464 INFO L82 PathProgramCache]: Analyzing trace with hash 1829257285, now seen corresponding path program 192 times [2021-06-05 23:26:01,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:26:01,464 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337368323] [2021-06-05 23:26:01,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:26:01,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:26:01,732 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:26:01,732 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:26:01,732 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337368323] [2021-06-05 23:26:01,732 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [337368323] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:26:01,732 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1865175917] [2021-06-05 23:26:01,732 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:26:01,755 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 23:26:01,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:26:01,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 23:26:01,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:26:02,298 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:26:02,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1865175917] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:26:02,299 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:26:02,299 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 33 [2021-06-05 23:26:02,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077528859] [2021-06-05 23:26:02,299 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 23:26:02,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:26:02,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 23:26:02,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=923, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 23:26:02,299 INFO L87 Difference]: Start difference. First operand 13158 states and 44097 transitions. Second operand has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:26:03,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:26:03,775 INFO L93 Difference]: Finished difference Result 18108 states and 59430 transitions. [2021-06-05 23:26:03,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 23:26:03,776 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 23:26:03,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:26:03,802 INFO L225 Difference]: With dead ends: 18108 [2021-06-05 23:26:03,802 INFO L226 Difference]: Without dead ends: 17988 [2021-06-05 23:26:03,802 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 747 ImplicationChecksByTransitivity, 1470.8ms TimeCoverageRelationStatistics Valid=630, Invalid=2340, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 23:26:03,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17988 states. [2021-06-05 23:26:03,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17988 to 13154. [2021-06-05 23:26:04,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13154 states, 13153 states have (on average 3.3517068349425987) internal successors, (44085), 13153 states have internal predecessors, (44085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:26:04,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13154 states to 13154 states and 44085 transitions. [2021-06-05 23:26:04,038 INFO L78 Accepts]: Start accepts. Automaton has 13154 states and 44085 transitions. Word has length 36 [2021-06-05 23:26:04,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:26:04,038 INFO L482 AbstractCegarLoop]: Abstraction has 13154 states and 44085 transitions. [2021-06-05 23:26:04,038 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:26:04,038 INFO L276 IsEmpty]: Start isEmpty. Operand 13154 states and 44085 transitions. [2021-06-05 23:26:04,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 23:26:04,055 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:26:04,055 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:26:04,255 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1433,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:26:04,255 INFO L430 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:26:04,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:26:04,255 INFO L82 PathProgramCache]: Analyzing trace with hash 256335961, now seen corresponding path program 193 times [2021-06-05 23:26:04,255 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:26:04,255 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915778353] [2021-06-05 23:26:04,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:26:04,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:26:04,479 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:26:04,479 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:26:04,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915778353] [2021-06-05 23:26:04,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915778353] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:26:04,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1259643988] [2021-06-05 23:26:04,479 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:26:04,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:26:04,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 23:26:04,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:26:05,032 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:26:05,032 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1259643988] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:26:05,032 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:26:05,032 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2021-06-05 23:26:05,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665366385] [2021-06-05 23:26:05,032 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 23:26:05,032 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:26:05,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 23:26:05,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=1144, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 23:26:05,032 INFO L87 Difference]: Start difference. First operand 13154 states and 44085 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:26:07,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:26:07,298 INFO L93 Difference]: Finished difference Result 15188 states and 49736 transitions. [2021-06-05 23:26:07,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-06-05 23:26:07,298 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 23:26:07,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:26:07,318 INFO L225 Difference]: With dead ends: 15188 [2021-06-05 23:26:07,318 INFO L226 Difference]: Without dead ends: 14952 [2021-06-05 23:26:07,318 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1428 ImplicationChecksByTransitivity, 1829.5ms TimeCoverageRelationStatistics Valid=767, Invalid=4489, Unknown=0, NotChecked=0, Total=5256 [2021-06-05 23:26:07,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14952 states. [2021-06-05 23:26:07,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14952 to 13202. [2021-06-05 23:26:07,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13202 states, 13201 states have (on average 3.351185516248769) internal successors, (44239), 13201 states have internal predecessors, (44239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:26:07,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13202 states to 13202 states and 44239 transitions. [2021-06-05 23:26:07,522 INFO L78 Accepts]: Start accepts. Automaton has 13202 states and 44239 transitions. Word has length 36 [2021-06-05 23:26:07,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:26:07,522 INFO L482 AbstractCegarLoop]: Abstraction has 13202 states and 44239 transitions. [2021-06-05 23:26:07,522 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:26:07,522 INFO L276 IsEmpty]: Start isEmpty. Operand 13202 states and 44239 transitions. [2021-06-05 23:26:07,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 23:26:07,538 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:26:07,538 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:26:07,738 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 193 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1443 [2021-06-05 23:26:07,738 INFO L430 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:26:07,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:26:07,739 INFO L82 PathProgramCache]: Analyzing trace with hash 1248829525, now seen corresponding path program 194 times [2021-06-05 23:26:07,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:26:07,739 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042651453] [2021-06-05 23:26:07,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:26:07,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:26:07,960 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:26:07,960 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:26:07,960 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042651453] [2021-06-05 23:26:07,961 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042651453] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:26:07,961 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1919450076] [2021-06-05 23:26:07,961 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:26:07,982 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:26:07,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:26:07,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 23:26:07,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:26:08,481 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:26:08,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1919450076] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:26:08,481 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:26:08,482 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 35 [2021-06-05 23:26:08,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500645757] [2021-06-05 23:26:08,482 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 23:26:08,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:26:08,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 23:26:08,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=1070, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 23:26:08,482 INFO L87 Difference]: Start difference. First operand 13202 states and 44239 transitions. Second operand has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:26:11,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:26:11,200 INFO L93 Difference]: Finished difference Result 16537 states and 53850 transitions. [2021-06-05 23:26:11,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-06-05 23:26:11,200 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 23:26:11,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:26:11,222 INFO L225 Difference]: With dead ends: 16537 [2021-06-05 23:26:11,222 INFO L226 Difference]: Without dead ends: 16291 [2021-06-05 23:26:11,222 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1804 ImplicationChecksByTransitivity, 2216.9ms TimeCoverageRelationStatistics Valid=951, Invalid=5529, Unknown=0, NotChecked=0, Total=6480 [2021-06-05 23:26:11,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16291 states. [2021-06-05 23:26:11,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16291 to 13221. [2021-06-05 23:26:11,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13221 states, 13220 states have (on average 3.3521180030257187) internal successors, (44315), 13220 states have internal predecessors, (44315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:26:11,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13221 states to 13221 states and 44315 transitions. [2021-06-05 23:26:11,434 INFO L78 Accepts]: Start accepts. Automaton has 13221 states and 44315 transitions. Word has length 36 [2021-06-05 23:26:11,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:26:11,434 INFO L482 AbstractCegarLoop]: Abstraction has 13221 states and 44315 transitions. [2021-06-05 23:26:11,434 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:26:11,434 INFO L276 IsEmpty]: Start isEmpty. Operand 13221 states and 44315 transitions. [2021-06-05 23:26:11,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 23:26:11,449 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:26:11,449 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:26:11,650 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1447,194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:26:11,650 INFO L430 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:26:11,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:26:11,650 INFO L82 PathProgramCache]: Analyzing trace with hash -1702405631, now seen corresponding path program 195 times [2021-06-05 23:26:11,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:26:11,650 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969024523] [2021-06-05 23:26:11,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:26:11,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:26:11,866 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:26:11,866 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:26:11,866 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969024523] [2021-06-05 23:26:11,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969024523] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:26:11,866 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1347831203] [2021-06-05 23:26:11,866 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 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:26:11,888 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 23:26:11,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:26:11,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 23:26:11,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:26:12,382 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:26:12,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1347831203] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:26:12,383 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:26:12,383 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 35 [2021-06-05 23:26:12,383 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486856444] [2021-06-05 23:26:12,383 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 23:26:12,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:26:12,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 23:26:12,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=1073, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 23:26:12,383 INFO L87 Difference]: Start difference. First operand 13221 states and 44315 transitions. Second operand has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:26:14,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:26:14,933 INFO L93 Difference]: Finished difference Result 16103 states and 52572 transitions. [2021-06-05 23:26:14,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-06-05 23:26:14,934 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 23:26:14,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:26:14,955 INFO L225 Difference]: With dead ends: 16103 [2021-06-05 23:26:14,955 INFO L226 Difference]: Without dead ends: 15869 [2021-06-05 23:26:14,955 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1579 ImplicationChecksByTransitivity, 2023.2ms TimeCoverageRelationStatistics Valid=872, Invalid=4980, Unknown=0, NotChecked=0, Total=5852 [2021-06-05 23:26:14,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15869 states. [2021-06-05 23:26:15,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15869 to 13235. [2021-06-05 23:26:15,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13235 states, 13234 states have (on average 3.351745504004836) internal successors, (44357), 13234 states have internal predecessors, (44357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:26:15,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13235 states to 13235 states and 44357 transitions. [2021-06-05 23:26:15,160 INFO L78 Accepts]: Start accepts. Automaton has 13235 states and 44357 transitions. Word has length 36 [2021-06-05 23:26:15,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:26:15,160 INFO L482 AbstractCegarLoop]: Abstraction has 13235 states and 44357 transitions. [2021-06-05 23:26:15,160 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:26:15,160 INFO L276 IsEmpty]: Start isEmpty. Operand 13235 states and 44357 transitions. [2021-06-05 23:26:15,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 23:26:15,176 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:26:15,176 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:26:15,376 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1451 [2021-06-05 23:26:15,376 INFO L430 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:26:15,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:26:15,376 INFO L82 PathProgramCache]: Analyzing trace with hash 1561029785, now seen corresponding path program 196 times [2021-06-05 23:26:15,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:26:15,376 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669716601] [2021-06-05 23:26:15,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:26:15,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:26:15,658 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:26:15,658 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:26:15,658 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669716601] [2021-06-05 23:26:15,658 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669716601] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:26:15,658 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [954237322] [2021-06-05 23:26:15,659 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 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:26:15,680 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:26:15,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:26:15,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 23:26:15,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:26:16,181 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:26:16,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [954237322] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:26:16,182 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:26:16,182 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-06-05 23:26:16,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723298398] [2021-06-05 23:26:16,182 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 23:26:16,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:26:16,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 23:26:16,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=1010, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 23:26:16,182 INFO L87 Difference]: Start difference. First operand 13235 states and 44357 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:26:18,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:26:18,509 INFO L93 Difference]: Finished difference Result 17515 states and 57509 transitions. [2021-06-05 23:26:18,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-05 23:26:18,509 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 23:26:18,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:26:18,537 INFO L225 Difference]: With dead ends: 17515 [2021-06-05 23:26:18,537 INFO L226 Difference]: Without dead ends: 17322 [2021-06-05 23:26:18,537 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1122 ImplicationChecksByTransitivity, 1792.1ms TimeCoverageRelationStatistics Valid=694, Invalid=3728, Unknown=0, NotChecked=0, Total=4422 [2021-06-05 23:26:18,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17322 states. [2021-06-05 23:26:18,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17322 to 13148. [2021-06-05 23:26:18,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13148 states, 13147 states have (on average 3.3514109682817375) internal successors, (44061), 13147 states have internal predecessors, (44061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:26:18,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13148 states to 13148 states and 44061 transitions. [2021-06-05 23:26:18,772 INFO L78 Accepts]: Start accepts. Automaton has 13148 states and 44061 transitions. Word has length 36 [2021-06-05 23:26:18,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:26:18,772 INFO L482 AbstractCegarLoop]: Abstraction has 13148 states and 44061 transitions. [2021-06-05 23:26:18,773 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:26:18,773 INFO L276 IsEmpty]: Start isEmpty. Operand 13148 states and 44061 transitions. [2021-06-05 23:26:18,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 23:26:18,789 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:26:18,789 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:26:18,989 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 196 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1455 [2021-06-05 23:26:18,989 INFO L430 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:26:18,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:26:18,990 INFO L82 PathProgramCache]: Analyzing trace with hash -119332775, now seen corresponding path program 197 times [2021-06-05 23:26:18,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:26:18,990 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323669517] [2021-06-05 23:26:18,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:26:18,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:26:19,279 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:26:19,279 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:26:19,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323669517] [2021-06-05 23:26:19,279 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323669517] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:26:19,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [324471927] [2021-06-05 23:26:19,279 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 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:26:19,302 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 23:26:19,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:26:19,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 23:26:19,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:26:19,870 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:26:19,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [324471927] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:26:19,871 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:26:19,871 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-06-05 23:26:19,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913871162] [2021-06-05 23:26:19,871 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 23:26:19,871 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:26:19,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 23:26:19,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=1034, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 23:26:19,871 INFO L87 Difference]: Start difference. First operand 13148 states and 44061 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:26:21,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:26:21,625 INFO L93 Difference]: Finished difference Result 15694 states and 51719 transitions. [2021-06-05 23:26:21,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 23:26:21,625 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 23:26:21,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:26:21,647 INFO L225 Difference]: With dead ends: 15694 [2021-06-05 23:26:21,647 INFO L226 Difference]: Without dead ends: 15626 [2021-06-05 23:26:21,648 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 786 ImplicationChecksByTransitivity, 1498.4ms TimeCoverageRelationStatistics Valid=528, Invalid=2894, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 23:26:21,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15626 states. [2021-06-05 23:26:21,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15626 to 13340. [2021-06-05 23:26:21,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13340 states, 13339 states have (on average 3.3481520353849614) internal successors, (44661), 13339 states have internal predecessors, (44661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:26:21,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13340 states to 13340 states and 44661 transitions. [2021-06-05 23:26:21,891 INFO L78 Accepts]: Start accepts. Automaton has 13340 states and 44661 transitions. Word has length 36 [2021-06-05 23:26:21,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:26:21,891 INFO L482 AbstractCegarLoop]: Abstraction has 13340 states and 44661 transitions. [2021-06-05 23:26:21,891 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:26:21,891 INFO L276 IsEmpty]: Start isEmpty. Operand 13340 states and 44661 transitions. [2021-06-05 23:26:21,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 23:26:21,907 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:26:21,907 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:26:22,107 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1460 [2021-06-05 23:26:22,107 INFO L430 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:26:22,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:26:22,107 INFO L82 PathProgramCache]: Analyzing trace with hash 802369365, now seen corresponding path program 198 times [2021-06-05 23:26:22,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:26:22,108 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268599262] [2021-06-05 23:26:22,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:26:22,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:26:22,407 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:26:22,407 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:26:22,407 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268599262] [2021-06-05 23:26:22,407 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268599262] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:26:22,407 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75471673] [2021-06-05 23:26:22,408 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:26:22,431 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 23:26:22,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:26:22,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 23:26:22,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:26:23,008 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:26:23,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [75471673] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:26:23,008 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:26:23,008 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 33 [2021-06-05 23:26:23,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129361119] [2021-06-05 23:26:23,008 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 23:26:23,008 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:26:23,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 23:26:23,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=952, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 23:26:23,009 INFO L87 Difference]: Start difference. First operand 13340 states and 44661 transitions. Second operand has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:26:25,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:26:25,159 INFO L93 Difference]: Finished difference Result 16841 states and 55578 transitions. [2021-06-05 23:26:25,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 23:26:25,159 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 23:26:25,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:26:25,184 INFO L225 Difference]: With dead ends: 16841 [2021-06-05 23:26:25,185 INFO L226 Difference]: Without dead ends: 16721 [2021-06-05 23:26:25,185 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 920 ImplicationChecksByTransitivity, 1760.5ms TimeCoverageRelationStatistics Valid=618, Invalid=3288, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 23:26:25,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16721 states. [2021-06-05 23:26:25,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16721 to 13338. [2021-06-05 23:26:25,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13338 states, 13337 states have (on average 3.347904326310265) internal successors, (44651), 13337 states have internal predecessors, (44651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:26:25,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13338 states to 13338 states and 44651 transitions. [2021-06-05 23:26:25,440 INFO L78 Accepts]: Start accepts. Automaton has 13338 states and 44651 transitions. Word has length 36 [2021-06-05 23:26:25,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:26:25,440 INFO L482 AbstractCegarLoop]: Abstraction has 13338 states and 44651 transitions. [2021-06-05 23:26:25,440 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:26:25,440 INFO L276 IsEmpty]: Start isEmpty. Operand 13338 states and 44651 transitions. [2021-06-05 23:26:25,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 23:26:25,455 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:26:25,455 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:26:25,656 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1464 [2021-06-05 23:26:25,656 INFO L430 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:26:25,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:26:25,656 INFO L82 PathProgramCache]: Analyzing trace with hash 732259329, now seen corresponding path program 199 times [2021-06-05 23:26:25,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:26:25,656 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370344919] [2021-06-05 23:26:25,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:26:25,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:26:25,963 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:26:25,963 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:26:25,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370344919] [2021-06-05 23:26:25,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370344919] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:26:25,964 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [539459783] [2021-06-05 23:26:25,964 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 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:26:25,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:26:25,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 23:26:25,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:26:26,590 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:26:26,591 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [539459783] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:26:26,591 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:26:26,591 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-06-05 23:26:26,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374832903] [2021-06-05 23:26:26,597 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 23:26:26,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:26:26,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 23:26:26,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=1017, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 23:26:26,598 INFO L87 Difference]: Start difference. First operand 13338 states and 44651 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:26:28,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:26:28,762 INFO L93 Difference]: Finished difference Result 15869 states and 52420 transitions. [2021-06-05 23:26:28,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-05 23:26:28,762 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 23:26:28,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:26:28,785 INFO L225 Difference]: With dead ends: 15869 [2021-06-05 23:26:28,785 INFO L226 Difference]: Without dead ends: 15749 [2021-06-05 23:26:28,786 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1029 ImplicationChecksByTransitivity, 1811.5ms TimeCoverageRelationStatistics Valid=646, Invalid=3514, Unknown=0, NotChecked=0, Total=4160 [2021-06-05 23:26:28,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15749 states. [2021-06-05 23:26:29,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15749 to 13338. [2021-06-05 23:26:29,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13338 states, 13337 states have (on average 3.347904326310265) internal successors, (44651), 13337 states have internal predecessors, (44651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:26:29,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13338 states to 13338 states and 44651 transitions. [2021-06-05 23:26:29,039 INFO L78 Accepts]: Start accepts. Automaton has 13338 states and 44651 transitions. Word has length 36 [2021-06-05 23:26:29,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:26:29,039 INFO L482 AbstractCegarLoop]: Abstraction has 13338 states and 44651 transitions. [2021-06-05 23:26:29,039 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:26:29,039 INFO L276 IsEmpty]: Start isEmpty. Operand 13338 states and 44651 transitions. [2021-06-05 23:26:29,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 23:26:29,055 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:26:29,055 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:26:29,255 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1474,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:26:29,255 INFO L430 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:26:29,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:26:29,256 INFO L82 PathProgramCache]: Analyzing trace with hash -840661995, now seen corresponding path program 200 times [2021-06-05 23:26:29,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:26:29,256 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285214412] [2021-06-05 23:26:29,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:26:29,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:26:29,483 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:26:29,484 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:26:29,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285214412] [2021-06-05 23:26:29,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285214412] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:26:29,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229659083] [2021-06-05 23:26:29,484 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 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:26:29,507 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:26:29,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:26:29,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 23:26:29,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:26:30,032 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:26:30,032 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [229659083] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:26:30,032 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:26:30,032 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 35 [2021-06-05 23:26:30,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091117445] [2021-06-05 23:26:30,032 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 23:26:30,032 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:26:30,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 23:26:30,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=1088, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 23:26:30,033 INFO L87 Difference]: Start difference. First operand 13338 states and 44651 transitions. Second operand has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:26:33,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:26:33,205 INFO L93 Difference]: Finished difference Result 15457 states and 50589 transitions. [2021-06-05 23:26:33,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-06-05 23:26:33,205 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 23:26:33,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:26:33,225 INFO L225 Difference]: With dead ends: 15457 [2021-06-05 23:26:33,225 INFO L226 Difference]: Without dead ends: 15191 [2021-06-05 23:26:33,225 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1905 ImplicationChecksByTransitivity, 2288.2ms TimeCoverageRelationStatistics Valid=884, Invalid=5922, Unknown=0, NotChecked=0, Total=6806 [2021-06-05 23:26:33,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15191 states. [2021-06-05 23:26:33,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15191 to 13394. [2021-06-05 23:26:33,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13394 states, 13393 states have (on average 3.3477936235346824) internal successors, (44837), 13393 states have internal predecessors, (44837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:26:33,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13394 states to 13394 states and 44837 transitions. [2021-06-05 23:26:33,439 INFO L78 Accepts]: Start accepts. Automaton has 13394 states and 44837 transitions. Word has length 36 [2021-06-05 23:26:33,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:26:33,439 INFO L482 AbstractCegarLoop]: Abstraction has 13394 states and 44837 transitions. [2021-06-05 23:26:33,439 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:26:33,439 INFO L276 IsEmpty]: Start isEmpty. Operand 13394 states and 44837 transitions. [2021-06-05 23:26:33,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 23:26:33,458 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:26:33,458 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:26:33,658 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1481,200 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:26:33,658 INFO L430 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:26:33,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:26:33,658 INFO L82 PathProgramCache]: Analyzing trace with hash 1495563709, now seen corresponding path program 201 times [2021-06-05 23:26:33,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:26:33,659 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548653490] [2021-06-05 23:26:33,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:26:33,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:26:33,874 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:26:33,874 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:26:33,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548653490] [2021-06-05 23:26:33,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548653490] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:26:33,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [417583828] [2021-06-05 23:26:33,874 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 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:26:33,896 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 23:26:33,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:26:33,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 23:26:33,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:26:34,401 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:26:34,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [417583828] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:26:34,402 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:26:34,402 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 35 [2021-06-05 23:26:34,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875887282] [2021-06-05 23:26:34,402 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 23:26:34,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:26:34,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 23:26:34,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=1077, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 23:26:34,402 INFO L87 Difference]: Start difference. First operand 13394 states and 44837 transitions. Second operand has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:26:37,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:26:37,253 INFO L93 Difference]: Finished difference Result 16203 states and 52886 transitions. [2021-06-05 23:26:37,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-06-05 23:26:37,253 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 23:26:37,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:26:37,276 INFO L225 Difference]: With dead ends: 16203 [2021-06-05 23:26:37,276 INFO L226 Difference]: Without dead ends: 15969 [2021-06-05 23:26:37,277 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2039 ImplicationChecksByTransitivity, 2204.2ms TimeCoverageRelationStatistics Valid=994, Invalid=5978, Unknown=0, NotChecked=0, Total=6972 [2021-06-05 23:26:37,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15969 states. [2021-06-05 23:26:37,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15969 to 13413. [2021-06-05 23:26:37,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13413 states, 13412 states have (on average 3.3479719654041156) internal successors, (44903), 13412 states have internal predecessors, (44903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:26:37,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13413 states to 13413 states and 44903 transitions. [2021-06-05 23:26:37,500 INFO L78 Accepts]: Start accepts. Automaton has 13413 states and 44903 transitions. Word has length 36 [2021-06-05 23:26:37,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:26:37,500 INFO L482 AbstractCegarLoop]: Abstraction has 13413 states and 44903 transitions. [2021-06-05 23:26:37,500 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:26:37,500 INFO L276 IsEmpty]: Start isEmpty. Operand 13413 states and 44903 transitions. [2021-06-05 23:26:37,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 23:26:37,516 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:26:37,516 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:26:37,716 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 201 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1485 [2021-06-05 23:26:37,716 INFO L430 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:26:37,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:26:37,717 INFO L82 PathProgramCache]: Analyzing trace with hash 464031829, now seen corresponding path program 202 times [2021-06-05 23:26:37,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:26:37,717 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947607118] [2021-06-05 23:26:37,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:26:37,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:26:37,964 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:26:37,964 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:26:37,965 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947607118] [2021-06-05 23:26:37,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947607118] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:26:37,965 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319723523] [2021-06-05 23:26:37,965 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 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:26:37,986 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:26:37,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:26:37,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 23:26:37,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:26:38,493 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:26:38,493 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1319723523] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:26:38,493 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:26:38,493 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-06-05 23:26:38,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091969291] [2021-06-05 23:26:38,493 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 23:26:38,493 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:26:38,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 23:26:38,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=1010, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 23:26:38,494 INFO L87 Difference]: Start difference. First operand 13413 states and 44903 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:26:40,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:26:40,879 INFO L93 Difference]: Finished difference Result 18372 states and 60615 transitions. [2021-06-05 23:26:40,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-05 23:26:40,879 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 23:26:40,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:26:40,904 INFO L225 Difference]: With dead ends: 18372 [2021-06-05 23:26:40,904 INFO L226 Difference]: Without dead ends: 18179 [2021-06-05 23:26:40,904 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1386 ImplicationChecksByTransitivity, 1868.6ms TimeCoverageRelationStatistics Valid=781, Invalid=4475, Unknown=0, NotChecked=0, Total=5256 [2021-06-05 23:26:40,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18179 states. [2021-06-05 23:26:41,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18179 to 13338. [2021-06-05 23:26:41,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13338 states, 13337 states have (on average 3.3476044087875834) internal successors, (44647), 13337 states have internal predecessors, (44647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:26:41,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13338 states to 13338 states and 44647 transitions. [2021-06-05 23:26:41,136 INFO L78 Accepts]: Start accepts. Automaton has 13338 states and 44647 transitions. Word has length 36 [2021-06-05 23:26:41,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:26:41,136 INFO L482 AbstractCegarLoop]: Abstraction has 13338 states and 44647 transitions. [2021-06-05 23:26:41,136 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:26:41,136 INFO L276 IsEmpty]: Start isEmpty. Operand 13338 states and 44647 transitions. [2021-06-05 23:26:41,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-05 23:26:41,152 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:26:41,152 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:26:41,359 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 202 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1489 [2021-06-05 23:26:41,359 INFO L430 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:26:41,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:26:41,360 INFO L82 PathProgramCache]: Analyzing trace with hash -13033305, now seen corresponding path program 203 times [2021-06-05 23:26:41,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:26:41,360 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533168051] [2021-06-05 23:26:41,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:26:41,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:26:41,541 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-06-05 23:26:41,542 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:26:41,542 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533168051] [2021-06-05 23:26:41,542 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533168051] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:26:41,542 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1049769889] [2021-06-05 23:26:41,542 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 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:26:41,565 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 23:26:41,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:26:41,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 23:26:41,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:26:42,195 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:26:42,195 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1049769889] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:26:42,195 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:26:42,195 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 22] total 36 [2021-06-05 23:26:42,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354288195] [2021-06-05 23:26:42,195 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 23:26:42,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:26:42,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 23:26:42,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=1165, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 23:26:42,195 INFO L87 Difference]: Start difference. First operand 13338 states and 44647 transitions. Second operand has 37 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 36 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:26:43,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:26:43,813 INFO L93 Difference]: Finished difference Result 14827 states and 48631 transitions. [2021-06-05 23:26:43,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 23:26:43,813 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 36 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-06-05 23:26:43,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:26:43,835 INFO L225 Difference]: With dead ends: 14827 [2021-06-05 23:26:43,835 INFO L226 Difference]: Without dead ends: 14785 [2021-06-05 23:26:43,835 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1070 ImplicationChecksByTransitivity, 1539.4ms TimeCoverageRelationStatistics Valid=602, Invalid=3688, Unknown=0, NotChecked=0, Total=4290 [2021-06-05 23:26:43,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14785 states. [2021-06-05 23:26:44,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14785 to 13924. [2021-06-05 23:26:44,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13924 states, 13923 states have (on average 3.326150973209797) internal successors, (46310), 13923 states have internal predecessors, (46310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:26:44,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13924 states to 13924 states and 46310 transitions. [2021-06-05 23:26:44,095 INFO L78 Accepts]: Start accepts. Automaton has 13924 states and 46310 transitions. Word has length 38 [2021-06-05 23:26:44,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:26:44,095 INFO L482 AbstractCegarLoop]: Abstraction has 13924 states and 46310 transitions. [2021-06-05 23:26:44,095 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 36 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:26:44,095 INFO L276 IsEmpty]: Start isEmpty. Operand 13924 states and 46310 transitions. [2021-06-05 23:26:44,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-05 23:26:44,114 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:26:44,114 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:26:44,314 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1494,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:26:44,315 INFO L430 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:26:44,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:26:44,315 INFO L82 PathProgramCache]: Analyzing trace with hash -850960473, now seen corresponding path program 204 times [2021-06-05 23:26:44,315 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:26:44,315 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798775893] [2021-06-05 23:26:44,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:26:44,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:26:44,530 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 23:26:44,530 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:26:44,530 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798775893] [2021-06-05 23:26:44,530 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [798775893] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:26:44,530 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [275910108] [2021-06-05 23:26:44,530 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 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:26:44,554 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 23:26:44,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:26:44,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 23:26:44,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:26:45,501 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 61 [2021-06-05 23:26:45,804 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 74 [2021-06-05 23:26:46,008 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:26:46,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [275910108] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:26:46,009 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:26:46,009 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 21] total 37 [2021-06-05 23:26:46,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684287811] [2021-06-05 23:26:46,009 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 23:26:46,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:26:46,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 23:26:46,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=1261, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 23:26:46,009 INFO L87 Difference]: Start difference. First operand 13924 states and 46310 transitions. Second operand has 38 states, 38 states have (on average 1.8157894736842106) internal successors, (69), 37 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:26:49,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:26:49,162 INFO L93 Difference]: Finished difference Result 14836 states and 48769 transitions. [2021-06-05 23:26:49,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-06-05 23:26:49,162 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.8157894736842106) internal successors, (69), 37 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-06-05 23:26:49,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:26:49,183 INFO L225 Difference]: With dead ends: 14836 [2021-06-05 23:26:49,183 INFO L226 Difference]: Without dead ends: 14784 [2021-06-05 23:26:49,184 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1294 ImplicationChecksByTransitivity, 2773.7ms TimeCoverageRelationStatistics Valid=655, Invalid=4601, Unknown=0, NotChecked=0, Total=5256 [2021-06-05 23:26:49,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14784 states. [2021-06-05 23:26:49,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14784 to 13574. [2021-06-05 23:26:49,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13574 states, 13573 states have (on average 3.340381640020629) internal successors, (45339), 13573 states have internal predecessors, (45339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:26:49,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13574 states to 13574 states and 45339 transitions. [2021-06-05 23:26:49,401 INFO L78 Accepts]: Start accepts. Automaton has 13574 states and 45339 transitions. Word has length 38 [2021-06-05 23:26:49,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:26:49,401 INFO L482 AbstractCegarLoop]: Abstraction has 13574 states and 45339 transitions. [2021-06-05 23:26:49,401 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.8157894736842106) internal successors, (69), 37 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:26:49,401 INFO L276 IsEmpty]: Start isEmpty. Operand 13574 states and 45339 transitions. [2021-06-05 23:26:49,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-05 23:26:49,417 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:26:49,417 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:26:49,617 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 204 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1503 [2021-06-05 23:26:49,617 INFO L430 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:26:49,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:26:49,618 INFO L82 PathProgramCache]: Analyzing trace with hash -543646297, now seen corresponding path program 205 times [2021-06-05 23:26:49,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:26:49,618 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052068665] [2021-06-05 23:26:49,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:26:49,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:26:49,928 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:26:49,928 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:26:49,928 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052068665] [2021-06-05 23:26:49,928 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052068665] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:26:49,928 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067823133] [2021-06-05 23:26:49,928 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:26:49,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:26:49,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 23:26:49,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:26:50,708 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:26:50,708 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2067823133] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:26:50,708 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:26:50,708 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2021-06-05 23:26:50,708 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94339052] [2021-06-05 23:26:50,708 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-06-05 23:26:50,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:26:50,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-06-05 23:26:50,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=1530, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 23:26:50,709 INFO L87 Difference]: Start difference. First operand 13574 states and 45339 transitions. Second operand has 43 states, 43 states have (on average 1.697674418604651) internal successors, (73), 42 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:26:52,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:26:52,248 INFO L93 Difference]: Finished difference Result 14425 states and 47520 transitions. [2021-06-05 23:26:52,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-05 23:26:52,249 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.697674418604651) internal successors, (73), 42 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-06-05 23:26:52,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:26:52,271 INFO L225 Difference]: With dead ends: 14425 [2021-06-05 23:26:52,272 INFO L226 Difference]: Without dead ends: 14356 [2021-06-05 23:26:52,272 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1462 ImplicationChecksByTransitivity, 1745.6ms TimeCoverageRelationStatistics Valid=896, Invalid=4360, Unknown=0, NotChecked=0, Total=5256 [2021-06-05 23:26:52,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14356 states. [2021-06-05 23:26:52,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14356 to 13822. [2021-06-05 23:26:52,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13822 states, 13821 states have (on average 3.333116272339194) internal successors, (46067), 13821 states have internal predecessors, (46067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:26:52,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13822 states to 13822 states and 46067 transitions. [2021-06-05 23:26:52,480 INFO L78 Accepts]: Start accepts. Automaton has 13822 states and 46067 transitions. Word has length 38 [2021-06-05 23:26:52,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:26:52,480 INFO L482 AbstractCegarLoop]: Abstraction has 13822 states and 46067 transitions. [2021-06-05 23:26:52,480 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 1.697674418604651) internal successors, (73), 42 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:26:52,480 INFO L276 IsEmpty]: Start isEmpty. Operand 13822 states and 46067 transitions. [2021-06-05 23:26:52,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-05 23:26:52,497 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:26:52,497 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:26:52,697 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1523,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:26:52,697 INFO L430 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:26:52,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:26:52,697 INFO L82 PathProgramCache]: Analyzing trace with hash 2039618983, now seen corresponding path program 206 times [2021-06-05 23:26:52,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:26:52,697 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880918689] [2021-06-05 23:26:52,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:26:52,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:26:52,957 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 3 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:26:52,957 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:26:52,957 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880918689] [2021-06-05 23:26:52,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1880918689] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:26:52,957 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [384235885] [2021-06-05 23:26:52,957 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:26:53,040 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:26:53,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:26:53,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 23:26:53,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:26:53,764 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 55 [2021-06-05 23:26:53,910 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 56 [2021-06-05 23:26:54,075 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 58 [2021-06-05 23:26:54,293 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 68 [2021-06-05 23:26:54,484 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:26:54,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [384235885] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:26:54,484 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:26:54,484 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 21] total 38 [2021-06-05 23:26:54,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578408208] [2021-06-05 23:26:54,484 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 23:26:54,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:26:54,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 23:26:54,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=1301, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 23:26:54,485 INFO L87 Difference]: Start difference. First operand 13822 states and 46067 transitions. Second operand has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:26:57,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:26:57,856 INFO L93 Difference]: Finished difference Result 15436 states and 50357 transitions. [2021-06-05 23:26:57,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-06-05 23:26:57,857 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-06-05 23:26:57,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:26:57,880 INFO L225 Difference]: With dead ends: 15436 [2021-06-05 23:26:57,880 INFO L226 Difference]: Without dead ends: 15384 [2021-06-05 23:26:57,881 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1863 ImplicationChecksByTransitivity, 3111.3ms TimeCoverageRelationStatistics Valid=959, Invalid=5847, Unknown=0, NotChecked=0, Total=6806 [2021-06-05 23:26:57,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15384 states. [2021-06-05 23:26:58,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15384 to 14212. [2021-06-05 23:26:58,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14212 states, 14211 states have (on average 3.3232003377665187) internal successors, (47226), 14211 states have internal predecessors, (47226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:26:58,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14212 states to 14212 states and 47226 transitions. [2021-06-05 23:26:58,114 INFO L78 Accepts]: Start accepts. Automaton has 14212 states and 47226 transitions. Word has length 38 [2021-06-05 23:26:58,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:26:58,114 INFO L482 AbstractCegarLoop]: Abstraction has 14212 states and 47226 transitions. [2021-06-05 23:26:58,114 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:26:58,115 INFO L276 IsEmpty]: Start isEmpty. Operand 14212 states and 47226 transitions. [2021-06-05 23:26:58,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-05 23:26:58,132 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:26:58,132 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:26:58,332 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 206 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1532 [2021-06-05 23:26:58,332 INFO L430 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:26:58,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:26:58,332 INFO L82 PathProgramCache]: Analyzing trace with hash 1201691815, now seen corresponding path program 207 times [2021-06-05 23:26:58,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:26:58,333 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470188574] [2021-06-05 23:26:58,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:26:58,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:26:58,572 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 23:26:58,572 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:26:58,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470188574] [2021-06-05 23:26:58,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470188574] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:26:58,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [665403976] [2021-06-05 23:26:58,572 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:26:58,596 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 23:26:58,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:26:58,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 23:26:58,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:26:59,573 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 59 [2021-06-05 23:26:59,847 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 70 [2021-06-05 23:27:00,030 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:27:00,030 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [665403976] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:27:00,030 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:27:00,030 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20] total 37 [2021-06-05 23:27:00,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538766554] [2021-06-05 23:27:00,030 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 23:27:00,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:27:00,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 23:27:00,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=1234, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 23:27:00,031 INFO L87 Difference]: Start difference. First operand 14212 states and 47226 transitions. Second operand has 38 states, 38 states have (on average 1.894736842105263) internal successors, (72), 37 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:03,308 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 76 [2021-06-05 23:27:03,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:27:03,774 INFO L93 Difference]: Finished difference Result 15675 states and 51224 transitions. [2021-06-05 23:27:03,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-06-05 23:27:03,774 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.894736842105263) internal successors, (72), 37 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-06-05 23:27:03,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:27:03,796 INFO L225 Difference]: With dead ends: 15675 [2021-06-05 23:27:03,796 INFO L226 Difference]: Without dead ends: 15608 [2021-06-05 23:27:03,797 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1882 ImplicationChecksByTransitivity, 3418.6ms TimeCoverageRelationStatistics Valid=969, Invalid=5837, Unknown=0, NotChecked=0, Total=6806 [2021-06-05 23:27:03,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15608 states. [2021-06-05 23:27:03,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15608 to 14560. [2021-06-05 23:27:04,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14560 states, 14559 states have (on average 3.315337591867573) internal successors, (48268), 14559 states have internal predecessors, (48268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:04,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14560 states to 14560 states and 48268 transitions. [2021-06-05 23:27:04,027 INFO L78 Accepts]: Start accepts. Automaton has 14560 states and 48268 transitions. Word has length 38 [2021-06-05 23:27:04,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:27:04,028 INFO L482 AbstractCegarLoop]: Abstraction has 14560 states and 48268 transitions. [2021-06-05 23:27:04,028 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.894736842105263) internal successors, (72), 37 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:04,028 INFO L276 IsEmpty]: Start isEmpty. Operand 14560 states and 48268 transitions. [2021-06-05 23:27:04,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-05 23:27:04,045 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:27:04,045 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:27:04,245 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1550 [2021-06-05 23:27:04,245 INFO L430 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:27:04,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:27:04,246 INFO L82 PathProgramCache]: Analyzing trace with hash -887432281, now seen corresponding path program 208 times [2021-06-05 23:27:04,246 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:27:04,246 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924505717] [2021-06-05 23:27:04,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:27:04,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:27:04,534 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 5 proven. 19 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 23:27:04,534 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:27:04,534 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924505717] [2021-06-05 23:27:04,534 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924505717] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:27:04,534 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [613016719] [2021-06-05 23:27:04,534 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:27:04,557 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:27:04,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:27:04,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 23:27:04,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:27:05,282 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:27:05,282 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [613016719] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:27:05,282 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:27:05,282 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22] total 41 [2021-06-05 23:27:05,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595628799] [2021-06-05 23:27:05,283 INFO L462 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-06-05 23:27:05,283 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:27:05,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-06-05 23:27:05,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=307, Invalid=1415, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 23:27:05,283 INFO L87 Difference]: Start difference. First operand 14560 states and 48268 transitions. Second operand has 42 states, 42 states have (on average 1.7142857142857142) internal successors, (72), 41 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:06,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:27:06,652 INFO L93 Difference]: Finished difference Result 15212 states and 49915 transitions. [2021-06-05 23:27:06,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-05 23:27:06,652 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.7142857142857142) internal successors, (72), 41 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-06-05 23:27:06,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:27:06,673 INFO L225 Difference]: With dead ends: 15212 [2021-06-05 23:27:06,674 INFO L226 Difference]: Without dead ends: 15158 [2021-06-05 23:27:06,674 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1195 ImplicationChecksByTransitivity, 1534.4ms TimeCoverageRelationStatistics Valid=814, Invalid=3608, Unknown=0, NotChecked=0, Total=4422 [2021-06-05 23:27:06,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15158 states. [2021-06-05 23:27:06,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15158 to 14648. [2021-06-05 23:27:06,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14648 states, 14647 states have (on average 3.312896838943128) internal successors, (48524), 14647 states have internal predecessors, (48524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:06,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14648 states to 14648 states and 48524 transitions. [2021-06-05 23:27:06,887 INFO L78 Accepts]: Start accepts. Automaton has 14648 states and 48524 transitions. Word has length 38 [2021-06-05 23:27:06,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:27:06,887 INFO L482 AbstractCegarLoop]: Abstraction has 14648 states and 48524 transitions. [2021-06-05 23:27:06,887 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 42 states, 42 states have (on average 1.7142857142857142) internal successors, (72), 41 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:06,887 INFO L276 IsEmpty]: Start isEmpty. Operand 14648 states and 48524 transitions. [2021-06-05 23:27:06,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-05 23:27:06,905 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:27:06,905 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:27:07,105 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1567,208 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:27:07,105 INFO L430 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:27:07,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:27:07,105 INFO L82 PathProgramCache]: Analyzing trace with hash 1509005991, now seen corresponding path program 209 times [2021-06-05 23:27:07,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:27:07,105 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600754233] [2021-06-05 23:27:07,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:27:07,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:27:07,454 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:27:07,454 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:27:07,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600754233] [2021-06-05 23:27:07,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [600754233] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:27:07,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [503635101] [2021-06-05 23:27:07,455 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:27:07,478 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 23:27:07,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:27:07,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 23:27:07,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:27:08,203 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:27:08,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [503635101] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:27:08,204 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:27:08,204 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 44 [2021-06-05 23:27:08,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498777393] [2021-06-05 23:27:08,204 INFO L462 AbstractCegarLoop]: Interpolant automaton has 45 states [2021-06-05 23:27:08,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:27:08,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-06-05 23:27:08,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=1650, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 23:27:08,204 INFO L87 Difference]: Start difference. First operand 14648 states and 48524 transitions. Second operand has 45 states, 45 states have (on average 1.6222222222222222) internal successors, (73), 44 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:10,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:27:10,159 INFO L93 Difference]: Finished difference Result 15560 states and 50807 transitions. [2021-06-05 23:27:10,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-06-05 23:27:10,159 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.6222222222222222) internal successors, (73), 44 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-06-05 23:27:10,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:27:10,182 INFO L225 Difference]: With dead ends: 15560 [2021-06-05 23:27:10,182 INFO L226 Difference]: Without dead ends: 15506 [2021-06-05 23:27:10,183 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2023 ImplicationChecksByTransitivity, 2113.6ms TimeCoverageRelationStatistics Valid=1242, Invalid=5730, Unknown=0, NotChecked=0, Total=6972 [2021-06-05 23:27:10,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15506 states. [2021-06-05 23:27:10,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15506 to 14716. [2021-06-05 23:27:10,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14716 states, 14715 states have (on average 3.311858647638464) internal successors, (48734), 14715 states have internal predecessors, (48734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:10,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14716 states to 14716 states and 48734 transitions. [2021-06-05 23:27:10,406 INFO L78 Accepts]: Start accepts. Automaton has 14716 states and 48734 transitions. Word has length 38 [2021-06-05 23:27:10,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:27:10,406 INFO L482 AbstractCegarLoop]: Abstraction has 14716 states and 48734 transitions. [2021-06-05 23:27:10,406 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 45 states, 45 states have (on average 1.6222222222222222) internal successors, (73), 44 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:10,406 INFO L276 IsEmpty]: Start isEmpty. Operand 14716 states and 48734 transitions. [2021-06-05 23:27:10,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-05 23:27:10,424 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:27:10,424 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:27:10,624 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1576 [2021-06-05 23:27:10,624 INFO L430 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:27:10,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:27:10,624 INFO L82 PathProgramCache]: Analyzing trace with hash 568201891, now seen corresponding path program 210 times [2021-06-05 23:27:10,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:27:10,624 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540426208] [2021-06-05 23:27:10,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:27:10,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:27:10,948 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:27:10,948 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:27:10,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540426208] [2021-06-05 23:27:10,948 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540426208] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:27:10,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206849137] [2021-06-05 23:27:10,949 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:27:10,973 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 23:27:10,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:27:10,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 23:27:10,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:27:11,919 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 59 [2021-06-05 23:27:12,182 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 68 [2021-06-05 23:27:12,370 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:27:12,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1206849137] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:27:12,371 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:27:12,371 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21] total 42 [2021-06-05 23:27:12,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686124803] [2021-06-05 23:27:12,371 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-06-05 23:27:12,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:27:12,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-06-05 23:27:12,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=1604, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 23:27:12,371 INFO L87 Difference]: Start difference. First operand 14716 states and 48734 transitions. Second operand has 43 states, 43 states have (on average 1.697674418604651) internal successors, (73), 42 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:16,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:27:16,214 INFO L93 Difference]: Finished difference Result 17167 states and 55569 transitions. [2021-06-05 23:27:16,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-06-05 23:27:16,214 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.697674418604651) internal successors, (73), 42 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-06-05 23:27:16,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:27:16,239 INFO L225 Difference]: With dead ends: 17167 [2021-06-05 23:27:16,240 INFO L226 Difference]: Without dead ends: 17088 [2021-06-05 23:27:16,240 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1937 ImplicationChecksByTransitivity, 3038.0ms TimeCoverageRelationStatistics Valid=1079, Invalid=6231, Unknown=0, NotChecked=0, Total=7310 [2021-06-05 23:27:16,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17088 states. [2021-06-05 23:27:16,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17088 to 15262. [2021-06-05 23:27:16,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15262 states, 15261 states have (on average 3.3067295721119194) internal successors, (50464), 15261 states have internal predecessors, (50464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:16,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15262 states to 15262 states and 50464 transitions. [2021-06-05 23:27:16,496 INFO L78 Accepts]: Start accepts. Automaton has 15262 states and 50464 transitions. Word has length 38 [2021-06-05 23:27:16,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:27:16,496 INFO L482 AbstractCegarLoop]: Abstraction has 15262 states and 50464 transitions. [2021-06-05 23:27:16,496 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 1.697674418604651) internal successors, (73), 42 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:16,496 INFO L276 IsEmpty]: Start isEmpty. Operand 15262 states and 50464 transitions. [2021-06-05 23:27:16,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-05 23:27:16,515 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:27:16,515 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:27:16,715 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1577 [2021-06-05 23:27:16,715 INFO L430 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:27:16,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:27:16,716 INFO L82 PathProgramCache]: Analyzing trace with hash 1254454179, now seen corresponding path program 211 times [2021-06-05 23:27:16,716 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:27:16,716 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882799493] [2021-06-05 23:27:16,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:27:16,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:27:16,961 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 20 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 23:27:16,961 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:27:16,961 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882799493] [2021-06-05 23:27:16,961 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882799493] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:27:16,961 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1415598005] [2021-06-05 23:27:16,961 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:27:16,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:27:16,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 23:27:16,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:27:17,779 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 55 [2021-06-05 23:27:17,991 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:27:17,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1415598005] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:27:17,991 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:27:17,991 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 21] total 37 [2021-06-05 23:27:17,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867031009] [2021-06-05 23:27:17,992 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 23:27:17,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:27:17,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 23:27:17,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=1230, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 23:27:17,992 INFO L87 Difference]: Start difference. First operand 15262 states and 50464 transitions. Second operand has 38 states, 38 states have (on average 1.868421052631579) 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) [2021-06-05 23:27:21,252 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 56 [2021-06-05 23:27:21,475 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 60 [2021-06-05 23:27:22,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:27:22,220 INFO L93 Difference]: Finished difference Result 22246 states and 71113 transitions. [2021-06-05 23:27:22,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-06-05 23:27:22,221 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.868421052631579) 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) Word has length 38 [2021-06-05 23:27:22,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:27:22,252 INFO L225 Difference]: With dead ends: 22246 [2021-06-05 23:27:22,253 INFO L226 Difference]: Without dead ends: 22204 [2021-06-05 23:27:22,253 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2857 ImplicationChecksByTransitivity, 3462.7ms TimeCoverageRelationStatistics Valid=1255, Invalid=8251, Unknown=0, NotChecked=0, Total=9506 [2021-06-05 23:27:22,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22204 states. [2021-06-05 23:27:22,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22204 to 16424. [2021-06-05 23:27:22,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16424 states, 16423 states have (on average 3.301589234609998) internal successors, (54222), 16423 states have internal predecessors, (54222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:22,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16424 states to 16424 states and 54222 transitions. [2021-06-05 23:27:22,571 INFO L78 Accepts]: Start accepts. Automaton has 16424 states and 54222 transitions. Word has length 38 [2021-06-05 23:27:22,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:27:22,571 INFO L482 AbstractCegarLoop]: Abstraction has 16424 states and 54222 transitions. [2021-06-05 23:27:22,571 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.868421052631579) 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) [2021-06-05 23:27:22,571 INFO L276 IsEmpty]: Start isEmpty. Operand 16424 states and 54222 transitions. [2021-06-05 23:27:22,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-05 23:27:22,593 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:27:22,593 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:27:22,793 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 211 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1594 [2021-06-05 23:27:22,794 INFO L430 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:27:22,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:27:22,794 INFO L82 PathProgramCache]: Analyzing trace with hash -1694493785, now seen corresponding path program 212 times [2021-06-05 23:27:22,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:27:22,794 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177941893] [2021-06-05 23:27:22,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:27:22,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:27:22,994 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 23:27:22,994 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:27:22,994 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177941893] [2021-06-05 23:27:22,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177941893] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:27:22,994 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [718809430] [2021-06-05 23:27:22,994 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:27:23,017 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:27:23,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:27:23,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 23:27:23,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:27:23,748 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 55 [2021-06-05 23:27:23,902 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 56 [2021-06-05 23:27:24,071 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 60 [2021-06-05 23:27:24,315 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 72 [2021-06-05 23:27:24,578 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:27:24,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [718809430] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:27:24,578 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:27:24,578 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 21] total 36 [2021-06-05 23:27:24,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400258538] [2021-06-05 23:27:24,578 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 23:27:24,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:27:24,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 23:27:24,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=1160, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 23:27:24,579 INFO L87 Difference]: Start difference. First operand 16424 states and 54222 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:28,635 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 59 [2021-06-05 23:27:28,819 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 60 [2021-06-05 23:27:29,108 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 61 [2021-06-05 23:27:29,356 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 62 [2021-06-05 23:27:29,539 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 64 [2021-06-05 23:27:29,942 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 66 [2021-06-05 23:27:30,359 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 73 [2021-06-05 23:27:30,604 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 74 [2021-06-05 23:27:30,825 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 77 [2021-06-05 23:27:31,282 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 76 [2021-06-05 23:27:31,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:27:31,721 INFO L93 Difference]: Finished difference Result 22695 states and 72511 transitions. [2021-06-05 23:27:31,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2021-06-05 23:27:31,721 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-06-05 23:27:31,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:27:31,752 INFO L225 Difference]: With dead ends: 22695 [2021-06-05 23:27:31,752 INFO L226 Difference]: Without dead ends: 22606 [2021-06-05 23:27:31,753 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3036 ImplicationChecksByTransitivity, 6027.7ms TimeCoverageRelationStatistics Valid=1342, Invalid=8960, Unknown=0, NotChecked=0, Total=10302 [2021-06-05 23:27:31,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22606 states. [2021-06-05 23:27:32,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22606 to 16429. [2021-06-05 23:27:32,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16429 states, 16428 states have (on average 3.301984416849282) internal successors, (54245), 16428 states have internal predecessors, (54245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:32,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16429 states to 16429 states and 54245 transitions. [2021-06-05 23:27:32,050 INFO L78 Accepts]: Start accepts. Automaton has 16429 states and 54245 transitions. Word has length 38 [2021-06-05 23:27:32,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:27:32,050 INFO L482 AbstractCegarLoop]: Abstraction has 16429 states and 54245 transitions. [2021-06-05 23:27:32,050 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:32,050 INFO L276 IsEmpty]: Start isEmpty. Operand 16429 states and 54245 transitions. [2021-06-05 23:27:32,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-05 23:27:32,069 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:27:32,069 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:27:32,269 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1605,212 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:27:32,269 INFO L430 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:27:32,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:27:32,270 INFO L82 PathProgramCache]: Analyzing trace with hash 739562091, now seen corresponding path program 213 times [2021-06-05 23:27:32,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:27:32,270 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155730638] [2021-06-05 23:27:32,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:27:32,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:27:32,559 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:27:32,560 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:27:32,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155730638] [2021-06-05 23:27:32,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155730638] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:27:32,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790539577] [2021-06-05 23:27:32,560 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 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:27:32,583 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 23:27:32,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:27:32,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 23:27:32,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:27:33,598 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 61 [2021-06-05 23:27:33,887 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 74 [2021-06-05 23:27:34,086 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:27:34,086 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [790539577] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:27:34,086 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:27:34,086 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 40 [2021-06-05 23:27:34,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380918728] [2021-06-05 23:27:34,087 INFO L462 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-06-05 23:27:34,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:27:34,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-06-05 23:27:34,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=1450, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 23:27:34,087 INFO L87 Difference]: Start difference. First operand 16429 states and 54245 transitions. Second operand has 41 states, 41 states have (on average 1.7804878048780488) internal successors, (73), 40 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:37,378 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 62 [2021-06-05 23:27:37,941 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 75 [2021-06-05 23:27:38,171 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 80 [2021-06-05 23:27:38,412 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 79 [2021-06-05 23:27:38,822 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 81 [2021-06-05 23:27:39,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:27:39,354 INFO L93 Difference]: Finished difference Result 24133 states and 76709 transitions. [2021-06-05 23:27:39,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-06-05 23:27:39,355 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.7804878048780488) internal successors, (73), 40 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-06-05 23:27:39,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:27:39,389 INFO L225 Difference]: With dead ends: 24133 [2021-06-05 23:27:39,389 INFO L226 Difference]: Without dead ends: 24051 [2021-06-05 23:27:39,390 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2778 ImplicationChecksByTransitivity, 4604.9ms TimeCoverageRelationStatistics Valid=1203, Invalid=8303, Unknown=0, NotChecked=0, Total=9506 [2021-06-05 23:27:39,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24051 states. [2021-06-05 23:27:39,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24051 to 16647. [2021-06-05 23:27:39,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16647 states, 16646 states have (on average 3.3071608794905685) internal successors, (55051), 16646 states have internal predecessors, (55051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:39,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16647 states to 16647 states and 55051 transitions. [2021-06-05 23:27:39,710 INFO L78 Accepts]: Start accepts. Automaton has 16647 states and 55051 transitions. Word has length 38 [2021-06-05 23:27:39,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:27:39,710 INFO L482 AbstractCegarLoop]: Abstraction has 16647 states and 55051 transitions. [2021-06-05 23:27:39,710 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 1.7804878048780488) internal successors, (73), 40 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:39,710 INFO L276 IsEmpty]: Start isEmpty. Operand 16647 states and 55051 transitions. [2021-06-05 23:27:39,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-05 23:27:39,730 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:27:39,730 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:27:39,930 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1625,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:27:39,930 INFO L430 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:27:39,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:27:39,931 INFO L82 PathProgramCache]: Analyzing trace with hash 696203939, now seen corresponding path program 214 times [2021-06-05 23:27:39,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:27:39,931 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193495035] [2021-06-05 23:27:39,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:27:39,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:27:40,258 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 5 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:27:40,259 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:27:40,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193495035] [2021-06-05 23:27:40,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193495035] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:27:40,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111535638] [2021-06-05 23:27:40,259 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 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:27:40,281 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:27:40,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:27:40,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 23:27:40,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:27:41,085 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:27:41,085 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [111535638] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:27:41,085 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:27:41,085 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21] total 39 [2021-06-05 23:27:41,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720456584] [2021-06-05 23:27:41,085 INFO L462 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-06-05 23:27:41,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:27:41,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-06-05 23:27:41,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=1373, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 23:27:41,086 INFO L87 Difference]: Start difference. First operand 16647 states and 55051 transitions. Second operand has 40 states, 40 states have (on average 1.825) internal successors, (73), 39 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:45,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:27:45,189 INFO L93 Difference]: Finished difference Result 24716 states and 79018 transitions. [2021-06-05 23:27:45,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2021-06-05 23:27:45,190 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.825) internal successors, (73), 39 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-06-05 23:27:45,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. Received shutdown request... [2021-06-05 23:27:45,228 INFO L225 Difference]: With dead ends: 24716 [2021-06-05 23:27:45,229 INFO L226 Difference]: Without dead ends: 24674 [2021-06-05 23:27:45,229 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3650 ImplicationChecksByTransitivity, 3491.7ms TimeCoverageRelationStatistics Valid=1521, Invalid=10035, Unknown=0, NotChecked=0, Total=11556 [2021-06-05 23:27:45,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24674 states. [2021-06-05 23:27:45,451 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 214 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1645 [2021-06-05 23:27:45,451 WARN L547 AbstractCegarLoop]: Verification canceled [2021-06-05 23:27:45,452 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-05 23:27:45,453 WARN L196 ceAbstractionStarter]: Timeout [2021-06-05 23:27:45,454 INFO L202 PluginConnector]: Adding new model threaded-sum-3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.06 11:27:45 BasicIcfg [2021-06-05 23:27:45,454 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-05 23:27:45,454 INFO L168 Benchmark]: Toolchain (without parser) took 780143.61 ms. Allocated memory was 358.6 MB in the beginning and 1.9 GB in the end (delta: 1.6 GB). Free memory was 337.5 MB in the beginning and 1.4 GB in the end (delta: -1.1 GB). Peak memory consumption was 471.4 MB. Max. memory is 16.0 GB. [2021-06-05 23:27:45,454 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.09 ms. Allocated memory is still 358.6 MB. Free memory is still 338.7 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 23:27:45,454 INFO L168 Benchmark]: Boogie Procedure Inliner took 18.48 ms. Allocated memory is still 358.6 MB. Free memory was 337.4 MB in the beginning and 336.0 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 23:27:45,454 INFO L168 Benchmark]: Boogie Preprocessor took 16.51 ms. Allocated memory is still 358.6 MB. Free memory was 336.0 MB in the beginning and 335.0 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-05 23:27:45,454 INFO L168 Benchmark]: RCFGBuilder took 269.05 ms. Allocated memory is still 358.6 MB. Free memory was 335.0 MB in the beginning and 320.5 MB in the end (delta: 14.5 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.0 GB. [2021-06-05 23:27:45,454 INFO L168 Benchmark]: TraceAbstraction took 779835.59 ms. Allocated memory was 358.6 MB in the beginning and 1.9 GB in the end (delta: 1.6 GB). Free memory was 320.0 MB in the beginning and 1.4 GB in the end (delta: -1.1 GB). Peak memory consumption was 454.6 MB. Max. memory is 16.0 GB. [2021-06-05 23:27:45,454 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.09 ms. Allocated memory is still 358.6 MB. Free memory is still 338.7 MB. There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 18.48 ms. Allocated memory is still 358.6 MB. Free memory was 337.4 MB in the beginning and 336.0 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 16.51 ms. Allocated memory is still 358.6 MB. Free memory was 336.0 MB in the beginning and 335.0 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 269.05 ms. Allocated memory is still 358.6 MB. Free memory was 335.0 MB in the beginning and 320.5 MB in the end (delta: 14.5 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.0 GB. * TraceAbstraction took 779835.59 ms. Allocated memory was 358.6 MB in the beginning and 1.9 GB in the end (delta: 1.6 GB). Free memory was 320.0 MB in the beginning and 1.4 GB in the end (delta: -1.1 GB). Peak memory consumption was 454.6 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 78]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while executing MinimizeSevpa. - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 7 procedures, 47 locations, 4 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 779751.0ms, OverallIterations: 217, TraceHistogramMax: 4, EmptinessCheckTime: 2493.8ms, AutomataDifference: 513207.1ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 27.5ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 7336 SDtfs, 78766 SDslu, 108320 SDs, 0 SdLazy, 452168 SolverSat, 37397 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 168307.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 18906 GetRequests, 4022 SyntacticMatches, 399 SemanticMatches, 14485 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320185 ImplicationChecksByTransitivity, 435489.4ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=16647occurred in iteration=216, InterpolantAutomatonStates: 12816, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 38400.9ms AutomataMinimizationTime, 217 MinimizatonAttempts, 963618 StatesRemovedByMinimization, 214 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 772.2ms SsaConstructionTime, 1916.5ms SatisfiabilityAnalysisTime, 175963.2ms InterpolantComputationTime, 15190 NumberOfCodeBlocks, 15190 NumberOfCodeBlocksAsserted, 907 NumberOfCheckSat, 14760 ConstructedInterpolants, 0 QuantifiedInterpolants, 353977 SizeOfPredicates, 1440 NumberOfNonLiveVariables, 13723 ConjunctsInSsa, 4574 ConjunctsInUnsatCore, 430 InterpolantComputations, 4 PerfectInterpolantSequences, 211/8114 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