/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-more/nonblocking-counter-alt2.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-2abb09bbbae98a04ae2fcc735832bfdba44f6fbc-2abb09b [2021-06-06 00:18:53,834 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-06 00:18:53,835 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-06 00:18:53,863 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-06 00:18:53,922 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 [2021-06-06 00:18:53,960 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-06 00:18:53,960 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-06 00:18:53,961 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-06 00:18:53,961 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-06 00:18:53,963 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-06 00:18:53,963 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-06 00:18:53,963 INFO L138 SettingsManager]: * Use SBE=true [2021-06-06 00:18:53,964 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-06 00:18:53,964 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-06 00:18:53,964 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-06 00:18:53,965 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-06 00:18:53,965 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-06 00:18:53,965 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-06 00:18:53,965 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-06 00:18:53,965 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-06 00:18:53,966 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-06 00:18:53,966 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-06 00:18:53,966 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-06 00:18:53,966 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-06 00:18:53,966 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-06 00:18:53,966 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-06 00:18:53,966 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-06 00:18:53,967 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-06 00:18:53,967 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-06 00:18:53,967 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-06 00:18:53,967 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-06 00:18:53,967 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-06 00:18:53,967 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-06 00:18:53,967 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-06 00:18:53,968 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-06 00:18:53,968 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-06 00:18:53,968 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-06 00:18:54,300 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-06 00:18:54,319 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-06 00:18:54,321 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-06 00:18:54,322 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-06 00:18:54,325 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-06 00:18:54,325 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/nonblocking-counter-alt2.wvr.bpl [2021-06-06 00:18:54,326 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/nonblocking-counter-alt2.wvr.bpl' [2021-06-06 00:18:54,363 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-06 00:18:54,364 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-06 00:18:54,365 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-06 00:18:54,365 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-06 00:18:54,366 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-06 00:18:54,377 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "nonblocking-counter-alt2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.06 12:18:54" (1/1) ... [2021-06-06 00:18:54,385 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "nonblocking-counter-alt2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.06 12:18:54" (1/1) ... [2021-06-06 00:18:54,392 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-06 00:18:54,393 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-06 00:18:54,394 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-06 00:18:54,395 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-06 00:18:54,401 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "nonblocking-counter-alt2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.06 12:18:54" (1/1) ... [2021-06-06 00:18:54,401 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "nonblocking-counter-alt2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.06 12:18:54" (1/1) ... [2021-06-06 00:18:54,402 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "nonblocking-counter-alt2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.06 12:18:54" (1/1) ... [2021-06-06 00:18:54,402 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "nonblocking-counter-alt2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.06 12:18:54" (1/1) ... [2021-06-06 00:18:54,404 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "nonblocking-counter-alt2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.06 12:18:54" (1/1) ... [2021-06-06 00:18:54,406 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "nonblocking-counter-alt2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.06 12:18:54" (1/1) ... [2021-06-06 00:18:54,406 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "nonblocking-counter-alt2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.06 12:18:54" (1/1) ... [2021-06-06 00:18:54,407 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-06 00:18:54,407 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-06 00:18:54,407 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-06 00:18:54,407 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-06 00:18:54,413 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "nonblocking-counter-alt2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.06 12:18:54" (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 [2021-06-06 00:18:54,472 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-06 00:18:54,473 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-06 00:18:54,473 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-06 00:18:54,473 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-06 00:18:54,473 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-06 00:18:54,473 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-06 00:18:54,473 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-06 00:18:54,473 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-06 00:18:54,474 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-06 00:18:54,474 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-06 00:18:54,683 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-06 00:18:54,683 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-06 00:18:54,685 INFO L202 PluginConnector]: Adding new model nonblocking-counter-alt2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.06 12:18:54 BoogieIcfgContainer [2021-06-06 00:18:54,685 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-06 00:18:54,686 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-06 00:18:54,687 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-06 00:18:54,689 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-06 00:18:54,689 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "nonblocking-counter-alt2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.06 12:18:54" (1/2) ... [2021-06-06 00:18:54,690 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ed58dbc and model type nonblocking-counter-alt2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.06 12:18:54, skipping insertion in model container [2021-06-06 00:18:54,690 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "nonblocking-counter-alt2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.06 12:18:54" (2/2) ... [2021-06-06 00:18:54,691 INFO L111 eAbstractionObserver]: Analyzing ICFG nonblocking-counter-alt2.wvr.bpl [2021-06-06 00:18:54,696 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-06 00:18:54,696 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-06 00:18:54,696 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-06 00:18:54,713 INFO L471 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-06 00:18:54,765 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-06-06 00:18:54,799 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-06-06 00:18:54,815 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-06 00:18:54,815 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-06 00:18:54,815 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-06 00:18:54,815 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-06 00:18:54,815 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-06 00:18:54,816 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-06 00:18:54,816 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-06 00:18:54,816 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-06 00:18:54,822 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 28 places, 23 transitions, 62 flow [2021-06-06 00:18:54,831 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 35 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:18:54,848 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:18:54,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-06 00:18:54,853 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:18:54,854 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:18:54,854 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:18:54,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:18:54,858 INFO L82 PathProgramCache]: Analyzing trace with hash -1715863245, now seen corresponding path program 1 times [2021-06-06 00:18:54,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:18:54,865 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933190754] [2021-06-06 00:18:54,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:18:54,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:18:55,046 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:18:55,047 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:18:55,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933190754] [2021-06-06 00:18:55,048 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933190754] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-06 00:18:55,048 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-06 00:18:55,049 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-06 00:18:55,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494953327] [2021-06-06 00:18:55,053 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-06 00:18:55,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:18:55,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-06 00:18:55,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-06 00:18:55,072 INFO L87 Difference]: Start difference. First operand has 35 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 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 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:18:55,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:18:55,123 INFO L93 Difference]: Finished difference Result 43 states and 77 transitions. [2021-06-06 00:18:55,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-06 00:18:55,125 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-06 00:18:55,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:18:55,134 INFO L225 Difference]: With dead ends: 43 [2021-06-06 00:18:55,135 INFO L226 Difference]: Without dead ends: 43 [2021-06-06 00:18:55,137 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 37.1ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-06 00:18:55,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-06-06 00:18:55,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 38. [2021-06-06 00:18:55,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 37 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) [2021-06-06 00:18:55,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 67 transitions. [2021-06-06 00:18:55,177 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 67 transitions. Word has length 15 [2021-06-06 00:18:55,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:18:55,177 INFO L482 AbstractCegarLoop]: Abstraction has 38 states and 67 transitions. [2021-06-06 00:18:55,178 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:18:55,178 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 67 transitions. [2021-06-06 00:18:55,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-06 00:18:55,179 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:18:55,179 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:18:55,180 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-06 00:18:55,180 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:18:55,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:18:55,184 INFO L82 PathProgramCache]: Analyzing trace with hash -599854287, now seen corresponding path program 1 times [2021-06-06 00:18:55,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:18:55,185 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583783219] [2021-06-06 00:18:55,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:18:55,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:18:55,234 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:18:55,235 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:18:55,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583783219] [2021-06-06 00:18:55,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583783219] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-06 00:18:55,236 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-06 00:18:55,236 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-06 00:18:55,236 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375155035] [2021-06-06 00:18:55,237 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-06 00:18:55,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:18:55,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-06 00:18:55,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-06 00:18:55,239 INFO L87 Difference]: Start difference. First operand 38 states and 67 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:18:55,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:18:55,277 INFO L93 Difference]: Finished difference Result 50 states and 91 transitions. [2021-06-06 00:18:55,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-06 00:18:55,277 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-06 00:18:55,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:18:55,280 INFO L225 Difference]: With dead ends: 50 [2021-06-06 00:18:55,280 INFO L226 Difference]: Without dead ends: 50 [2021-06-06 00:18:55,281 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 22.7ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-06-06 00:18:55,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-06-06 00:18:55,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 44. [2021-06-06 00:18:55,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.8372093023255813) internal successors, (79), 43 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:18:55,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 79 transitions. [2021-06-06 00:18:55,296 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 79 transitions. Word has length 17 [2021-06-06 00:18:55,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:18:55,296 INFO L482 AbstractCegarLoop]: Abstraction has 44 states and 79 transitions. [2021-06-06 00:18:55,296 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:18:55,296 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 79 transitions. [2021-06-06 00:18:55,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-06 00:18:55,297 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:18:55,297 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:18:55,297 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-06 00:18:55,300 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:18:55,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:18:55,301 INFO L82 PathProgramCache]: Analyzing trace with hash -1329802641, now seen corresponding path program 1 times [2021-06-06 00:18:55,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:18:55,301 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666874542] [2021-06-06 00:18:55,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:18:55,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:18:55,431 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:18:55,431 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:18:55,432 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666874542] [2021-06-06 00:18:55,432 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666874542] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:18:55,432 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1391044854] [2021-06-06 00:18:55,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:18:55,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:18:55,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-06 00:18:55,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:18:55,795 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:18:55,796 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1391044854] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:18:55,798 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:18:55,799 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-06 00:18:55,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341915537] [2021-06-06 00:18:55,799 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-06 00:18:55,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:18:55,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-06 00:18:55,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-06-06 00:18:55,801 INFO L87 Difference]: Start difference. First operand 44 states and 79 transitions. Second operand has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 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) [2021-06-06 00:18:55,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:18:55,930 INFO L93 Difference]: Finished difference Result 144 states and 274 transitions. [2021-06-06 00:18:55,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-06 00:18:55,931 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 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 19 [2021-06-06 00:18:55,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:18:55,934 INFO L225 Difference]: With dead ends: 144 [2021-06-06 00:18:55,938 INFO L226 Difference]: Without dead ends: 113 [2021-06-06 00:18:55,939 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 148.9ms TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-06-06 00:18:55,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-06-06 00:18:55,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 55. [2021-06-06 00:18:55,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.9074074074074074) internal successors, (103), 54 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:18:55,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 103 transitions. [2021-06-06 00:18:55,957 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 103 transitions. Word has length 19 [2021-06-06 00:18:55,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:18:55,957 INFO L482 AbstractCegarLoop]: Abstraction has 55 states and 103 transitions. [2021-06-06 00:18:55,957 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 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) [2021-06-06 00:18:55,957 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 103 transitions. [2021-06-06 00:18:55,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-06 00:18:55,958 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:18:55,958 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:18:56,172 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-06-06 00:18:56,173 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:18:56,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:18:56,174 INFO L82 PathProgramCache]: Analyzing trace with hash 1564465709, now seen corresponding path program 2 times [2021-06-06 00:18:56,174 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:18:56,174 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947766102] [2021-06-06 00:18:56,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:18:56,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:18:56,286 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:18:56,286 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:18:56,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947766102] [2021-06-06 00:18:56,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947766102] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:18:56,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2029397181] [2021-06-06 00:18:56,287 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:18:56,326 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:18:56,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:18:56,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-06 00:18:56,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:18:56,483 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:18:56,483 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2029397181] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:18:56,484 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:18:56,484 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2021-06-06 00:18:56,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544618403] [2021-06-06 00:18:56,484 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-06 00:18:56,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:18:56,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-06 00:18:56,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-06-06 00:18:56,485 INFO L87 Difference]: Start difference. First operand 55 states and 103 transitions. Second operand has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:18:56,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:18:56,788 INFO L93 Difference]: Finished difference Result 167 states and 307 transitions. [2021-06-06 00:18:56,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-06 00:18:56,789 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-06 00:18:56,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:18:56,790 INFO L225 Difference]: With dead ends: 167 [2021-06-06 00:18:56,790 INFO L226 Difference]: Without dead ends: 167 [2021-06-06 00:18:56,791 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 279.4ms TimeCoverageRelationStatistics Valid=185, Invalid=465, Unknown=0, NotChecked=0, Total=650 [2021-06-06 00:18:56,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-06-06 00:18:56,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 75. [2021-06-06 00:18:56,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 2.0135135135135136) internal successors, (149), 74 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:18:56,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 149 transitions. [2021-06-06 00:18:56,808 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 149 transitions. Word has length 21 [2021-06-06 00:18:56,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:18:56,809 INFO L482 AbstractCegarLoop]: Abstraction has 75 states and 149 transitions. [2021-06-06 00:18:56,809 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:18:56,809 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 149 transitions. [2021-06-06 00:18:56,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-06 00:18:56,810 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:18:56,810 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:18:57,035 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:18:57,035 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:18:57,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:18:57,036 INFO L82 PathProgramCache]: Analyzing trace with hash 1814278047, now seen corresponding path program 3 times [2021-06-06 00:18:57,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:18:57,037 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246977686] [2021-06-06 00:18:57,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:18:57,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:18:57,094 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:18:57,095 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:18:57,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246977686] [2021-06-06 00:18:57,095 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1246977686] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:18:57,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [829139362] [2021-06-06 00:18:57,095 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-06 00:18:57,124 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-06 00:18:57,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:18:57,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-06 00:18:57,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:18:57,322 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:18:57,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [829139362] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:18:57,322 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:18:57,323 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-06-06 00:18:57,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244739804] [2021-06-06 00:18:57,323 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-06 00:18:57,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:18:57,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-06 00:18:57,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-06-06 00:18:57,324 INFO L87 Difference]: Start difference. First operand 75 states and 149 transitions. Second operand has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:18:57,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:18:57,631 INFO L93 Difference]: Finished difference Result 141 states and 267 transitions. [2021-06-06 00:18:57,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-06 00:18:57,632 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-06 00:18:57,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:18:57,632 INFO L225 Difference]: With dead ends: 141 [2021-06-06 00:18:57,632 INFO L226 Difference]: Without dead ends: 139 [2021-06-06 00:18:57,633 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 290.0ms TimeCoverageRelationStatistics Valid=176, Invalid=424, Unknown=0, NotChecked=0, Total=600 [2021-06-06 00:18:57,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-06-06 00:18:57,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 77. [2021-06-06 00:18:57,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 1.986842105263158) internal successors, (151), 76 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:18:57,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 151 transitions. [2021-06-06 00:18:57,637 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 151 transitions. Word has length 21 [2021-06-06 00:18:57,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:18:57,638 INFO L482 AbstractCegarLoop]: Abstraction has 77 states and 151 transitions. [2021-06-06 00:18:57,638 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:18:57,638 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 151 transitions. [2021-06-06 00:18:57,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-06 00:18:57,639 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:18:57,639 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:18:57,856 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-06-06 00:18:57,857 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:18:57,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:18:57,857 INFO L82 PathProgramCache]: Analyzing trace with hash -709724757, now seen corresponding path program 4 times [2021-06-06 00:18:57,858 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:18:57,859 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191281459] [2021-06-06 00:18:57,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:18:57,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:18:58,033 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:18:58,036 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:18:58,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191281459] [2021-06-06 00:18:58,036 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191281459] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:18:58,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756100687] [2021-06-06 00:18:58,037 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 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 [2021-06-06 00:18:58,083 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:18:58,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:18:58,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-06 00:18:58,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:18:58,475 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:18:58,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1756100687] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:18:58,475 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:18:58,475 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2021-06-06 00:18:58,476 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727712922] [2021-06-06 00:18:58,476 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-06 00:18:58,476 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:18:58,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-06 00:18:58,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2021-06-06 00:18:58,477 INFO L87 Difference]: Start difference. First operand 77 states and 151 transitions. Second operand has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:18:59,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:18:59,121 INFO L93 Difference]: Finished difference Result 350 states and 689 transitions. [2021-06-06 00:18:59,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-06 00:18:59,122 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-06 00:18:59,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:18:59,124 INFO L225 Difference]: With dead ends: 350 [2021-06-06 00:18:59,124 INFO L226 Difference]: Without dead ends: 293 [2021-06-06 00:18:59,125 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 665.4ms TimeCoverageRelationStatistics Valid=240, Invalid=1020, Unknown=0, NotChecked=0, Total=1260 [2021-06-06 00:18:59,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2021-06-06 00:18:59,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 93. [2021-06-06 00:18:59,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 2.010869565217391) internal successors, (185), 92 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:18:59,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 185 transitions. [2021-06-06 00:18:59,131 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 185 transitions. Word has length 23 [2021-06-06 00:18:59,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:18:59,132 INFO L482 AbstractCegarLoop]: Abstraction has 93 states and 185 transitions. [2021-06-06 00:18:59,132 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:18:59,132 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 185 transitions. [2021-06-06 00:18:59,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-06 00:18:59,133 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:18:59,133 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:18:59,349 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:18:59,349 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:18:59,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:18:59,349 INFO L82 PathProgramCache]: Analyzing trace with hash -923989763, now seen corresponding path program 5 times [2021-06-06 00:18:59,350 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:18:59,350 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778787825] [2021-06-06 00:18:59,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:18:59,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:18:59,539 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:18:59,539 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:18:59,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778787825] [2021-06-06 00:18:59,539 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778787825] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:18:59,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2011315837] [2021-06-06 00:18:59,539 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 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 [2021-06-06 00:18:59,564 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-06 00:18:59,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:18:59,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-06 00:18:59,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:18:59,900 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:18:59,900 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2011315837] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:18:59,901 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:18:59,901 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2021-06-06 00:18:59,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988760191] [2021-06-06 00:18:59,901 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-06 00:18:59,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:18:59,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-06 00:18:59,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2021-06-06 00:18:59,902 INFO L87 Difference]: Start difference. First operand 93 states and 185 transitions. Second operand has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:19:00,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:19:00,648 INFO L93 Difference]: Finished difference Result 326 states and 652 transitions. [2021-06-06 00:19:00,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-06 00:19:00,649 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-06 00:19:00,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:19:00,650 INFO L225 Difference]: With dead ends: 326 [2021-06-06 00:19:00,650 INFO L226 Difference]: Without dead ends: 286 [2021-06-06 00:19:00,651 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 746.9ms TimeCoverageRelationStatistics Valid=246, Invalid=1086, Unknown=0, NotChecked=0, Total=1332 [2021-06-06 00:19:00,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2021-06-06 00:19:00,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 120. [2021-06-06 00:19:00,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 119 states have (on average 2.0672268907563027) internal successors, (246), 119 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:19:00,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 246 transitions. [2021-06-06 00:19:00,657 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 246 transitions. Word has length 23 [2021-06-06 00:19:00,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:19:00,657 INFO L482 AbstractCegarLoop]: Abstraction has 120 states and 246 transitions. [2021-06-06 00:19:00,657 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:19:00,658 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 246 transitions. [2021-06-06 00:19:00,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-06 00:19:00,659 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:19:00,659 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:19:00,872 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-06-06 00:19:00,873 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:19:00,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:19:00,873 INFO L82 PathProgramCache]: Analyzing trace with hash 656818999, now seen corresponding path program 6 times [2021-06-06 00:19:00,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:19:00,873 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888653580] [2021-06-06 00:19:00,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:19:00,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:19:01,059 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:19:01,060 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:19:01,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888653580] [2021-06-06 00:19:01,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1888653580] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:19:01,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [427731361] [2021-06-06 00:19:01,060 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 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 [2021-06-06 00:19:01,084 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-06 00:19:01,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:19:01,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-06 00:19:01,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:19:01,416 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:19:01,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [427731361] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:19:01,417 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:19:01,417 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2021-06-06 00:19:01,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583892371] [2021-06-06 00:19:01,418 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-06 00:19:01,418 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:19:01,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-06 00:19:01,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2021-06-06 00:19:01,420 INFO L87 Difference]: Start difference. First operand 120 states and 246 transitions. Second operand has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:19:02,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:19:02,687 INFO L93 Difference]: Finished difference Result 387 states and 768 transitions. [2021-06-06 00:19:02,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-06 00:19:02,688 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-06 00:19:02,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:19:02,689 INFO L225 Difference]: With dead ends: 387 [2021-06-06 00:19:02,689 INFO L226 Difference]: Without dead ends: 341 [2021-06-06 00:19:02,690 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 543 ImplicationChecksByTransitivity, 1251.9ms TimeCoverageRelationStatistics Valid=361, Invalid=1619, Unknown=0, NotChecked=0, Total=1980 [2021-06-06 00:19:02,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2021-06-06 00:19:02,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 124. [2021-06-06 00:19:02,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 2.073170731707317) internal successors, (255), 123 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:19:02,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 255 transitions. [2021-06-06 00:19:02,697 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 255 transitions. Word has length 23 [2021-06-06 00:19:02,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:19:02,697 INFO L482 AbstractCegarLoop]: Abstraction has 124 states and 255 transitions. [2021-06-06 00:19:02,697 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:19:02,697 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 255 transitions. [2021-06-06 00:19:02,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-06 00:19:02,698 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:19:02,698 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:19:02,912 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:19:02,913 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:19:02,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:19:02,913 INFO L82 PathProgramCache]: Analyzing trace with hash -73546911, now seen corresponding path program 7 times [2021-06-06 00:19:02,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:19:02,913 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709234635] [2021-06-06 00:19:02,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:19:02,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:19:02,993 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:19:02,993 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:19:02,993 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709234635] [2021-06-06 00:19:02,993 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709234635] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:19:02,993 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [109718187] [2021-06-06 00:19:02,993 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 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 [2021-06-06 00:19:03,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:19:03,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-06 00:19:03,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:19:03,186 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:19:03,186 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [109718187] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:19:03,186 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:19:03,186 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-06 00:19:03,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232765296] [2021-06-06 00:19:03,186 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-06 00:19:03,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:19:03,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-06 00:19:03,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2021-06-06 00:19:03,187 INFO L87 Difference]: Start difference. First operand 124 states and 255 transitions. Second operand has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:19:03,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:19:03,673 INFO L93 Difference]: Finished difference Result 302 states and 585 transitions. [2021-06-06 00:19:03,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-06 00:19:03,673 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-06 00:19:03,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:19:03,675 INFO L225 Difference]: With dead ends: 302 [2021-06-06 00:19:03,675 INFO L226 Difference]: Without dead ends: 294 [2021-06-06 00:19:03,675 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 318 ImplicationChecksByTransitivity, 450.2ms TimeCoverageRelationStatistics Valid=301, Invalid=1031, Unknown=0, NotChecked=0, Total=1332 [2021-06-06 00:19:03,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2021-06-06 00:19:03,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 161. [2021-06-06 00:19:03,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 2.2) internal successors, (352), 160 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:19:03,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 352 transitions. [2021-06-06 00:19:03,683 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 352 transitions. Word has length 23 [2021-06-06 00:19:03,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:19:03,683 INFO L482 AbstractCegarLoop]: Abstraction has 161 states and 352 transitions. [2021-06-06 00:19:03,684 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:19:03,684 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 352 transitions. [2021-06-06 00:19:03,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-06 00:19:03,685 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:19:03,685 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:19:03,907 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-06-06 00:19:03,907 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:19:03,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:19:03,907 INFO L82 PathProgramCache]: Analyzing trace with hash -170955159, now seen corresponding path program 8 times [2021-06-06 00:19:03,907 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:19:03,907 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303172510] [2021-06-06 00:19:03,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:19:03,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:19:03,984 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:19:03,984 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:19:03,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303172510] [2021-06-06 00:19:03,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303172510] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:19:03,985 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1094026611] [2021-06-06 00:19:03,985 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-06 00:19:04,007 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:19:04,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:19:04,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-06 00:19:04,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:19:04,152 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:19:04,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1094026611] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:19:04,153 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:19:04,153 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-06-06 00:19:04,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430307201] [2021-06-06 00:19:04,153 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-06 00:19:04,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:19:04,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-06 00:19:04,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2021-06-06 00:19:04,154 INFO L87 Difference]: Start difference. First operand 161 states and 352 transitions. Second operand has 18 states, 18 states have (on average 2.5) internal successors, (45), 17 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:19:04,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:19:04,629 INFO L93 Difference]: Finished difference Result 404 states and 806 transitions. [2021-06-06 00:19:04,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-06 00:19:04,629 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 17 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-06 00:19:04,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:19:04,631 INFO L225 Difference]: With dead ends: 404 [2021-06-06 00:19:04,631 INFO L226 Difference]: Without dead ends: 404 [2021-06-06 00:19:04,632 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 421.0ms TimeCoverageRelationStatistics Valid=402, Invalid=1080, Unknown=0, NotChecked=0, Total=1482 [2021-06-06 00:19:04,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2021-06-06 00:19:04,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 175. [2021-06-06 00:19:04,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 2.2011494252873565) internal successors, (383), 174 states have internal predecessors, (383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:19:04,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 383 transitions. [2021-06-06 00:19:04,639 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 383 transitions. Word has length 25 [2021-06-06 00:19:04,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:19:04,639 INFO L482 AbstractCegarLoop]: Abstraction has 175 states and 383 transitions. [2021-06-06 00:19:04,639 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 17 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:19:04,639 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 383 transitions. [2021-06-06 00:19:04,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-06 00:19:04,641 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:19:04,641 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:19:04,860 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-06-06 00:19:04,861 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:19:04,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:19:04,861 INFO L82 PathProgramCache]: Analyzing trace with hash 465222687, now seen corresponding path program 9 times [2021-06-06 00:19:04,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:19:04,861 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843039082] [2021-06-06 00:19:04,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:19:04,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:19:04,915 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:19:04,915 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:19:04,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843039082] [2021-06-06 00:19:04,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843039082] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:19:04,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404707919] [2021-06-06 00:19:04,915 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-06 00:19:04,939 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-06 00:19:04,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:19:04,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-06 00:19:04,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:19:05,119 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:19:05,120 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1404707919] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:19:05,120 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:19:05,120 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10] total 15 [2021-06-06 00:19:05,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029145180] [2021-06-06 00:19:05,120 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-06 00:19:05,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:19:05,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-06 00:19:05,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-06-06 00:19:05,121 INFO L87 Difference]: Start difference. First operand 175 states and 383 transitions. Second operand has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:19:05,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:19:05,693 INFO L93 Difference]: Finished difference Result 308 states and 630 transitions. [2021-06-06 00:19:05,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-06 00:19:05,694 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-06 00:19:05,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:19:05,695 INFO L225 Difference]: With dead ends: 308 [2021-06-06 00:19:05,695 INFO L226 Difference]: Without dead ends: 306 [2021-06-06 00:19:05,696 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 504 ImplicationChecksByTransitivity, 559.3ms TimeCoverageRelationStatistics Valid=493, Invalid=1399, Unknown=0, NotChecked=0, Total=1892 [2021-06-06 00:19:05,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2021-06-06 00:19:05,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 175. [2021-06-06 00:19:05,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 2.1954022988505746) internal successors, (382), 174 states have internal predecessors, (382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:19:05,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 382 transitions. [2021-06-06 00:19:05,702 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 382 transitions. Word has length 25 [2021-06-06 00:19:05,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:19:05,702 INFO L482 AbstractCegarLoop]: Abstraction has 175 states and 382 transitions. [2021-06-06 00:19:05,702 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:19:05,702 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 382 transitions. [2021-06-06 00:19:05,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-06 00:19:05,704 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:19:05,704 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:19:05,916 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:19:05,917 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:19:05,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:19:05,917 INFO L82 PathProgramCache]: Analyzing trace with hash -2001868057, now seen corresponding path program 10 times [2021-06-06 00:19:05,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:19:05,917 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479206073] [2021-06-06 00:19:05,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:19:05,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:19:06,105 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:19:06,106 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:19:06,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479206073] [2021-06-06 00:19:06,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479206073] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:19:06,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [404902891] [2021-06-06 00:19:06,106 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:19:06,133 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:19:06,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:19:06,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-06 00:19:06,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:19:06,595 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:19:06,595 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [404902891] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:19:06,595 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:19:06,596 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-06 00:19:06,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759979073] [2021-06-06 00:19:06,596 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-06 00:19:06,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:19:06,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-06 00:19:06,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=499, Unknown=0, NotChecked=0, Total=600 [2021-06-06 00:19:06,597 INFO L87 Difference]: Start difference. First operand 175 states and 382 transitions. Second operand has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 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) [2021-06-06 00:19:07,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:19:07,446 INFO L93 Difference]: Finished difference Result 609 states and 1253 transitions. [2021-06-06 00:19:07,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-06 00:19:07,446 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 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 27 [2021-06-06 00:19:07,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:19:07,449 INFO L225 Difference]: With dead ends: 609 [2021-06-06 00:19:07,449 INFO L226 Difference]: Without dead ends: 543 [2021-06-06 00:19:07,450 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 638 ImplicationChecksByTransitivity, 938.3ms TimeCoverageRelationStatistics Valid=364, Invalid=1892, Unknown=0, NotChecked=0, Total=2256 [2021-06-06 00:19:07,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 543 states. [2021-06-06 00:19:07,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 543 to 229. [2021-06-06 00:19:07,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 228 states have (on average 2.219298245614035) internal successors, (506), 228 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:19:07,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 506 transitions. [2021-06-06 00:19:07,457 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 506 transitions. Word has length 27 [2021-06-06 00:19:07,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:19:07,457 INFO L482 AbstractCegarLoop]: Abstraction has 229 states and 506 transitions. [2021-06-06 00:19:07,457 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 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) [2021-06-06 00:19:07,458 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 506 transitions. [2021-06-06 00:19:07,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-06 00:19:07,458 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:19:07,458 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:19:07,666 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-06-06 00:19:07,667 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:19:07,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:19:07,667 INFO L82 PathProgramCache]: Analyzing trace with hash -1752108615, now seen corresponding path program 11 times [2021-06-06 00:19:07,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:19:07,667 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609914819] [2021-06-06 00:19:07,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:19:07,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:19:07,925 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:19:07,926 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:19:07,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609914819] [2021-06-06 00:19:07,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609914819] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:19:07,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924943765] [2021-06-06 00:19:07,926 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:19:07,956 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-06 00:19:07,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:19:07,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-06 00:19:07,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:19:08,410 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:19:08,410 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1924943765] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:19:08,410 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:19:08,410 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-06 00:19:08,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379593062] [2021-06-06 00:19:08,411 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-06 00:19:08,411 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:19:08,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-06 00:19:08,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600 [2021-06-06 00:19:08,412 INFO L87 Difference]: Start difference. First operand 229 states and 506 transitions. Second operand has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 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) [2021-06-06 00:19:09,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:19:09,505 INFO L93 Difference]: Finished difference Result 588 states and 1219 transitions. [2021-06-06 00:19:09,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-06 00:19:09,505 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 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 27 [2021-06-06 00:19:09,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:19:09,508 INFO L225 Difference]: With dead ends: 588 [2021-06-06 00:19:09,508 INFO L226 Difference]: Without dead ends: 534 [2021-06-06 00:19:09,509 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 656 ImplicationChecksByTransitivity, 1141.1ms TimeCoverageRelationStatistics Valid=348, Invalid=1908, Unknown=0, NotChecked=0, Total=2256 [2021-06-06 00:19:09,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 534 states. [2021-06-06 00:19:09,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 534 to 248. [2021-06-06 00:19:09,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 247 states have (on average 2.210526315789474) internal successors, (546), 247 states have internal predecessors, (546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:19:09,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 546 transitions. [2021-06-06 00:19:09,520 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 546 transitions. Word has length 27 [2021-06-06 00:19:09,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:19:09,520 INFO L482 AbstractCegarLoop]: Abstraction has 248 states and 546 transitions. [2021-06-06 00:19:09,520 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 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) [2021-06-06 00:19:09,520 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 546 transitions. [2021-06-06 00:19:09,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-06 00:19:09,521 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:19:09,522 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:19:09,740 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2021-06-06 00:19:09,741 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:19:09,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:19:09,741 INFO L82 PathProgramCache]: Analyzing trace with hash 1644513465, now seen corresponding path program 12 times [2021-06-06 00:19:09,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:19:09,741 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349992080] [2021-06-06 00:19:09,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:19:09,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:19:09,953 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:19:09,954 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:19:09,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349992080] [2021-06-06 00:19:09,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349992080] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:19:09,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96347828] [2021-06-06 00:19:09,954 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:19:09,983 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-06 00:19:09,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:19:09,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-06 00:19:09,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:19:10,435 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:19:10,435 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [96347828] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:19:10,435 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:19:10,435 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-06 00:19:10,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649203343] [2021-06-06 00:19:10,436 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-06 00:19:10,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:19:10,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-06 00:19:10,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=505, Unknown=0, NotChecked=0, Total=600 [2021-06-06 00:19:10,436 INFO L87 Difference]: Start difference. First operand 248 states and 546 transitions. Second operand has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 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) [2021-06-06 00:19:11,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:19:11,527 INFO L93 Difference]: Finished difference Result 592 states and 1236 transitions. [2021-06-06 00:19:11,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-06 00:19:11,528 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 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 27 [2021-06-06 00:19:11,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:19:11,530 INFO L225 Difference]: With dead ends: 592 [2021-06-06 00:19:11,530 INFO L226 Difference]: Without dead ends: 559 [2021-06-06 00:19:11,531 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 722 ImplicationChecksByTransitivity, 1116.8ms TimeCoverageRelationStatistics Valid=425, Invalid=2125, Unknown=0, NotChecked=0, Total=2550 [2021-06-06 00:19:11,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 559 states. [2021-06-06 00:19:11,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 559 to 272. [2021-06-06 00:19:11,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 271 states have (on average 2.206642066420664) internal successors, (598), 271 states have internal predecessors, (598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:19:11,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 598 transitions. [2021-06-06 00:19:11,539 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 598 transitions. Word has length 27 [2021-06-06 00:19:11,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:19:11,540 INFO L482 AbstractCegarLoop]: Abstraction has 272 states and 598 transitions. [2021-06-06 00:19:11,540 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 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) [2021-06-06 00:19:11,540 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 598 transitions. [2021-06-06 00:19:11,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-06 00:19:11,541 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:19:11,541 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:19:11,758 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:19:11,758 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:19:11,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:19:11,758 INFO L82 PathProgramCache]: Analyzing trace with hash 1281656179, now seen corresponding path program 13 times [2021-06-06 00:19:11,759 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:19:11,759 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223927358] [2021-06-06 00:19:11,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:19:11,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:19:11,998 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:19:11,998 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:19:11,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223927358] [2021-06-06 00:19:11,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223927358] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:19:11,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [210163991] [2021-06-06 00:19:11,998 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:19:12,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:19:12,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-06 00:19:12,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:19:12,509 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:19:12,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [210163991] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:19:12,510 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:19:12,510 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-06 00:19:12,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467596321] [2021-06-06 00:19:12,512 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-06 00:19:12,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:19:12,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-06 00:19:12,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=509, Unknown=0, NotChecked=0, Total=600 [2021-06-06 00:19:12,513 INFO L87 Difference]: Start difference. First operand 272 states and 598 transitions. Second operand has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 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) [2021-06-06 00:19:13,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:19:13,960 INFO L93 Difference]: Finished difference Result 679 states and 1420 transitions. [2021-06-06 00:19:13,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-06 00:19:13,961 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 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 27 [2021-06-06 00:19:13,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:19:13,963 INFO L225 Difference]: With dead ends: 679 [2021-06-06 00:19:13,963 INFO L226 Difference]: Without dead ends: 616 [2021-06-06 00:19:13,964 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 828 ImplicationChecksByTransitivity, 1503.9ms TimeCoverageRelationStatistics Valid=435, Invalid=2427, Unknown=0, NotChecked=0, Total=2862 [2021-06-06 00:19:13,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 616 states. [2021-06-06 00:19:13,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 616 to 280. [2021-06-06 00:19:13,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 279 states have (on average 2.2007168458781363) internal successors, (614), 279 states have internal predecessors, (614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:19:13,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 614 transitions. [2021-06-06 00:19:13,973 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 614 transitions. Word has length 27 [2021-06-06 00:19:13,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:19:13,973 INFO L482 AbstractCegarLoop]: Abstraction has 280 states and 614 transitions. [2021-06-06 00:19:13,973 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 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) [2021-06-06 00:19:13,973 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 614 transitions. [2021-06-06 00:19:13,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-06 00:19:13,974 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:19:13,974 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:19:14,184 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable84 [2021-06-06 00:19:14,185 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:19:14,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:19:14,185 INFO L82 PathProgramCache]: Analyzing trace with hash 383310963, now seen corresponding path program 14 times [2021-06-06 00:19:14,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:19:14,185 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980993571] [2021-06-06 00:19:14,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:19:14,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:19:14,378 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:19:14,379 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:19:14,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980993571] [2021-06-06 00:19:14,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980993571] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:19:14,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1093508641] [2021-06-06 00:19:14,379 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:19:14,419 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:19:14,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:19:14,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-06 00:19:14,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:19:14,873 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:19:14,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1093508641] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:19:14,873 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:19:14,873 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-06 00:19:14,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2216912] [2021-06-06 00:19:14,874 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-06 00:19:14,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:19:14,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-06 00:19:14,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=509, Unknown=0, NotChecked=0, Total=600 [2021-06-06 00:19:14,875 INFO L87 Difference]: Start difference. First operand 280 states and 614 transitions. Second operand has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 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) [2021-06-06 00:19:16,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:19:16,694 INFO L93 Difference]: Finished difference Result 744 states and 1546 transitions. [2021-06-06 00:19:16,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-06 00:19:16,695 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 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 27 [2021-06-06 00:19:16,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:19:16,697 INFO L225 Difference]: With dead ends: 744 [2021-06-06 00:19:16,697 INFO L226 Difference]: Without dead ends: 704 [2021-06-06 00:19:16,698 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1191 ImplicationChecksByTransitivity, 1768.9ms TimeCoverageRelationStatistics Valid=710, Invalid=3322, Unknown=0, NotChecked=0, Total=4032 [2021-06-06 00:19:16,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 704 states. [2021-06-06 00:19:16,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 704 to 291. [2021-06-06 00:19:16,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 290 states have (on average 2.2103448275862068) internal successors, (641), 290 states have internal predecessors, (641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:19:16,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 641 transitions. [2021-06-06 00:19:16,709 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 641 transitions. Word has length 27 [2021-06-06 00:19:16,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:19:16,709 INFO L482 AbstractCegarLoop]: Abstraction has 291 states and 641 transitions. [2021-06-06 00:19:16,709 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 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) [2021-06-06 00:19:16,709 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 641 transitions. [2021-06-06 00:19:16,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-06 00:19:16,710 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:19:16,710 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:19:16,933 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:19:16,933 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:19:16,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:19:16,933 INFO L82 PathProgramCache]: Analyzing trace with hash 113919671, now seen corresponding path program 15 times [2021-06-06 00:19:16,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:19:16,934 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317458419] [2021-06-06 00:19:16,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:19:16,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:19:17,055 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:19:17,055 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:19:17,055 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317458419] [2021-06-06 00:19:17,055 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317458419] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:19:17,055 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1675510599] [2021-06-06 00:19:17,055 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:19:17,079 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-06 00:19:17,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:19:17,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-06 00:19:17,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:19:17,348 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:19:17,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1675510599] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:19:17,349 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:19:17,349 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2021-06-06 00:19:17,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498145528] [2021-06-06 00:19:17,349 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-06 00:19:17,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:19:17,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-06 00:19:17,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-06-06 00:19:17,350 INFO L87 Difference]: Start difference. First operand 291 states and 641 transitions. Second operand has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 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) [2021-06-06 00:19:18,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:19:18,222 INFO L93 Difference]: Finished difference Result 662 states and 1432 transitions. [2021-06-06 00:19:18,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-06 00:19:18,223 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 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 27 [2021-06-06 00:19:18,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:19:18,225 INFO L225 Difference]: With dead ends: 662 [2021-06-06 00:19:18,225 INFO L226 Difference]: Without dead ends: 662 [2021-06-06 00:19:18,225 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 510 ImplicationChecksByTransitivity, 882.3ms TimeCoverageRelationStatistics Valid=438, Invalid=1632, Unknown=0, NotChecked=0, Total=2070 [2021-06-06 00:19:18,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 662 states. [2021-06-06 00:19:18,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 662 to 340. [2021-06-06 00:19:18,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 339 states have (on average 2.2359882005899707) internal successors, (758), 339 states have internal predecessors, (758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:19:18,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 758 transitions. [2021-06-06 00:19:18,235 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 758 transitions. Word has length 27 [2021-06-06 00:19:18,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:19:18,235 INFO L482 AbstractCegarLoop]: Abstraction has 340 states and 758 transitions. [2021-06-06 00:19:18,235 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 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) [2021-06-06 00:19:18,235 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 758 transitions. [2021-06-06 00:19:18,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-06 00:19:18,236 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:19:18,236 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:19:18,455 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:19:18,455 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:19:18,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:19:18,456 INFO L82 PathProgramCache]: Analyzing trace with hash 1553365309, now seen corresponding path program 16 times [2021-06-06 00:19:18,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:19:18,456 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839595717] [2021-06-06 00:19:18,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:19:18,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:19:18,679 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:19:18,679 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:19:18,679 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839595717] [2021-06-06 00:19:18,680 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839595717] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:19:18,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [452634917] [2021-06-06 00:19:18,680 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:19:18,707 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:19:18,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:19:18,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-06 00:19:18,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:19:19,174 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:19:19,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [452634917] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:19:19,175 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:19:19,175 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-06 00:19:19,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827232961] [2021-06-06 00:19:19,175 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-06 00:19:19,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:19:19,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-06 00:19:19,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2021-06-06 00:19:19,175 INFO L87 Difference]: Start difference. First operand 340 states and 758 transitions. Second operand has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 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) [2021-06-06 00:19:21,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:19:21,241 INFO L93 Difference]: Finished difference Result 1105 states and 2323 transitions. [2021-06-06 00:19:21,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-06 00:19:21,241 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 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 27 [2021-06-06 00:19:21,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:19:21,245 INFO L225 Difference]: With dead ends: 1105 [2021-06-06 00:19:21,245 INFO L226 Difference]: Without dead ends: 1038 [2021-06-06 00:19:21,246 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1695 ImplicationChecksByTransitivity, 1969.8ms TimeCoverageRelationStatistics Valid=688, Invalid=4424, Unknown=0, NotChecked=0, Total=5112 [2021-06-06 00:19:21,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1038 states. [2021-06-06 00:19:21,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1038 to 406. [2021-06-06 00:19:21,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 405 states have (on average 2.3061728395061727) internal successors, (934), 405 states have internal predecessors, (934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:19:21,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 934 transitions. [2021-06-06 00:19:21,258 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 934 transitions. Word has length 27 [2021-06-06 00:19:21,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:19:21,259 INFO L482 AbstractCegarLoop]: Abstraction has 406 states and 934 transitions. [2021-06-06 00:19:21,259 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 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) [2021-06-06 00:19:21,259 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 934 transitions. [2021-06-06 00:19:21,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-06 00:19:21,260 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:19:21,260 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:19:21,483 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:19:21,483 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:19:21,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:19:21,483 INFO L82 PathProgramCache]: Analyzing trace with hash -525801667, now seen corresponding path program 17 times [2021-06-06 00:19:21,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:19:21,484 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57995325] [2021-06-06 00:19:21,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:19:21,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:19:21,605 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:19:21,606 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:19:21,606 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57995325] [2021-06-06 00:19:21,606 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [57995325] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:19:21,606 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [722743650] [2021-06-06 00:19:21,606 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:19:21,628 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-06 00:19:21,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:19:21,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-06 00:19:21,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:19:21,916 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:19:21,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [722743650] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:19:21,917 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:19:21,917 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2021-06-06 00:19:21,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114564432] [2021-06-06 00:19:21,917 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-06 00:19:21,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:19:21,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-06 00:19:21,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2021-06-06 00:19:21,918 INFO L87 Difference]: Start difference. First operand 406 states and 934 transitions. Second operand has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 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) [2021-06-06 00:19:23,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:19:23,013 INFO L93 Difference]: Finished difference Result 820 states and 1742 transitions. [2021-06-06 00:19:23,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-06 00:19:23,014 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 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 27 [2021-06-06 00:19:23,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:19:23,016 INFO L225 Difference]: With dead ends: 820 [2021-06-06 00:19:23,017 INFO L226 Difference]: Without dead ends: 793 [2021-06-06 00:19:23,017 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 700 ImplicationChecksByTransitivity, 1055.5ms TimeCoverageRelationStatistics Valid=547, Invalid=2003, Unknown=0, NotChecked=0, Total=2550 [2021-06-06 00:19:23,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 793 states. [2021-06-06 00:19:23,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 793 to 370. [2021-06-06 00:19:23,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 369 states have (on average 2.2086720867208673) internal successors, (815), 369 states have internal predecessors, (815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:19:23,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 815 transitions. [2021-06-06 00:19:23,028 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 815 transitions. Word has length 27 [2021-06-06 00:19:23,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:19:23,028 INFO L482 AbstractCegarLoop]: Abstraction has 370 states and 815 transitions. [2021-06-06 00:19:23,028 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 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) [2021-06-06 00:19:23,028 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 815 transitions. [2021-06-06 00:19:23,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-06 00:19:23,029 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:19:23,029 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:19:23,245 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2021-06-06 00:19:23,245 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:19:23,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:19:23,245 INFO L82 PathProgramCache]: Analyzing trace with hash -879273425, now seen corresponding path program 18 times [2021-06-06 00:19:23,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:19:23,245 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824420594] [2021-06-06 00:19:23,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:19:23,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:19:23,307 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:19:23,307 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:19:23,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824420594] [2021-06-06 00:19:23,307 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824420594] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:19:23,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470730255] [2021-06-06 00:19:23,307 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:19:23,347 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-06 00:19:23,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:19:23,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-06 00:19:23,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:19:23,550 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:19:23,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [470730255] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:19:23,550 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:19:23,550 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12] total 19 [2021-06-06 00:19:23,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345047171] [2021-06-06 00:19:23,551 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-06 00:19:23,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:19:23,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-06 00:19:23,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2021-06-06 00:19:23,551 INFO L87 Difference]: Start difference. First operand 370 states and 815 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:19:24,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:19:24,196 INFO L93 Difference]: Finished difference Result 790 states and 1683 transitions. [2021-06-06 00:19:24,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-06 00:19:24,197 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-06 00:19:24,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:19:24,198 INFO L225 Difference]: With dead ends: 790 [2021-06-06 00:19:24,199 INFO L226 Difference]: Without dead ends: 786 [2021-06-06 00:19:24,199 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 667 ImplicationChecksByTransitivity, 649.7ms TimeCoverageRelationStatistics Valid=534, Invalid=1818, Unknown=0, NotChecked=0, Total=2352 [2021-06-06 00:19:24,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 786 states. [2021-06-06 00:19:24,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 786 to 458. [2021-06-06 00:19:24,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 458 states, 457 states have (on average 2.2603938730853392) internal successors, (1033), 457 states have internal predecessors, (1033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:19:24,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 458 states to 458 states and 1033 transitions. [2021-06-06 00:19:24,210 INFO L78 Accepts]: Start accepts. Automaton has 458 states and 1033 transitions. Word has length 27 [2021-06-06 00:19:24,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:19:24,211 INFO L482 AbstractCegarLoop]: Abstraction has 458 states and 1033 transitions. [2021-06-06 00:19:24,211 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:19:24,211 INFO L276 IsEmpty]: Start isEmpty. Operand 458 states and 1033 transitions. [2021-06-06 00:19:24,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-06 00:19:24,212 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:19:24,212 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:19:24,434 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2021-06-06 00:19:24,434 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:19:24,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:19:24,434 INFO L82 PathProgramCache]: Analyzing trace with hash -335260507, now seen corresponding path program 19 times [2021-06-06 00:19:24,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:19:24,435 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620694891] [2021-06-06 00:19:24,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:19:24,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:19:24,520 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:19:24,521 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:19:24,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620694891] [2021-06-06 00:19:24,521 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620694891] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:19:24,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1959768858] [2021-06-06 00:19:24,521 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:19:24,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:19:24,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-06 00:19:24,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:19:24,845 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:19:24,846 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1959768858] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:19:24,846 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:19:24,846 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-06 00:19:24,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283272388] [2021-06-06 00:19:24,846 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-06 00:19:24,846 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:19:24,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-06 00:19:24,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=446, Unknown=0, NotChecked=0, Total=552 [2021-06-06 00:19:24,847 INFO L87 Difference]: Start difference. First operand 458 states and 1033 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 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) [2021-06-06 00:19:25,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:19:25,636 INFO L93 Difference]: Finished difference Result 890 states and 1856 transitions. [2021-06-06 00:19:25,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-06 00:19:25,636 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 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 29 [2021-06-06 00:19:25,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:19:25,638 INFO L225 Difference]: With dead ends: 890 [2021-06-06 00:19:25,639 INFO L226 Difference]: Without dead ends: 890 [2021-06-06 00:19:25,639 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 816 ImplicationChecksByTransitivity, 773.1ms TimeCoverageRelationStatistics Valid=775, Invalid=2417, Unknown=0, NotChecked=0, Total=3192 [2021-06-06 00:19:25,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 890 states. [2021-06-06 00:19:25,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 890 to 490. [2021-06-06 00:19:25,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 490 states, 489 states have (on average 2.276073619631902) internal successors, (1113), 489 states have internal predecessors, (1113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:19:25,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 490 states to 490 states and 1113 transitions. [2021-06-06 00:19:25,651 INFO L78 Accepts]: Start accepts. Automaton has 490 states and 1113 transitions. Word has length 29 [2021-06-06 00:19:25,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:19:25,651 INFO L482 AbstractCegarLoop]: Abstraction has 490 states and 1113 transitions. [2021-06-06 00:19:25,651 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 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) [2021-06-06 00:19:25,651 INFO L276 IsEmpty]: Start isEmpty. Operand 490 states and 1113 transitions. [2021-06-06 00:19:25,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-06 00:19:25,652 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:19:25,652 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:19:25,872 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:19:25,873 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:19:25,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:19:25,873 INFO L82 PathProgramCache]: Analyzing trace with hash -2063984225, now seen corresponding path program 20 times [2021-06-06 00:19:25,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:19:25,873 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507927059] [2021-06-06 00:19:25,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:19:25,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:19:25,926 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:19:25,926 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:19:25,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507927059] [2021-06-06 00:19:25,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507927059] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:19:25,927 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975544505] [2021-06-06 00:19:25,927 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:19:25,958 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:19:25,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:19:25,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-06 00:19:25,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:19:26,136 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:19:26,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1975544505] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:19:26,137 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:19:26,137 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 12] total 18 [2021-06-06 00:19:26,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315686492] [2021-06-06 00:19:26,137 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-06 00:19:26,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:19:26,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-06 00:19:26,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2021-06-06 00:19:26,138 INFO L87 Difference]: Start difference. First operand 490 states and 1113 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 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) [2021-06-06 00:19:27,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:19:27,100 INFO L93 Difference]: Finished difference Result 726 states and 1556 transitions. [2021-06-06 00:19:27,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-06 00:19:27,100 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-06 00:19:27,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:19:27,102 INFO L225 Difference]: With dead ends: 726 [2021-06-06 00:19:27,102 INFO L226 Difference]: Without dead ends: 722 [2021-06-06 00:19:27,103 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1225 ImplicationChecksByTransitivity, 912.8ms TimeCoverageRelationStatistics Valid=1000, Invalid=3032, Unknown=0, NotChecked=0, Total=4032 [2021-06-06 00:19:27,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 722 states. [2021-06-06 00:19:27,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 722 to 458. [2021-06-06 00:19:27,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 458 states, 457 states have (on average 2.25382932166302) internal successors, (1030), 457 states have internal predecessors, (1030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:19:27,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 458 states to 458 states and 1030 transitions. [2021-06-06 00:19:27,111 INFO L78 Accepts]: Start accepts. Automaton has 458 states and 1030 transitions. Word has length 29 [2021-06-06 00:19:27,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:19:27,111 INFO L482 AbstractCegarLoop]: Abstraction has 458 states and 1030 transitions. [2021-06-06 00:19:27,112 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 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) [2021-06-06 00:19:27,112 INFO L276 IsEmpty]: Start isEmpty. Operand 458 states and 1030 transitions. [2021-06-06 00:19:27,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-06 00:19:27,113 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:19:27,113 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:19:27,335 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2021-06-06 00:19:27,335 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:19:27,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:19:27,336 INFO L82 PathProgramCache]: Analyzing trace with hash 2078249141, now seen corresponding path program 21 times [2021-06-06 00:19:27,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:19:27,336 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713334850] [2021-06-06 00:19:27,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:19:27,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:19:27,510 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:19:27,511 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:19:27,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713334850] [2021-06-06 00:19:27,511 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713334850] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:19:27,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1302336705] [2021-06-06 00:19:27,511 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:19:27,539 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-06 00:19:27,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:19:27,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-06 00:19:27,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:19:27,873 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:19:27,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1302336705] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:19:27,873 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:19:27,873 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 27 [2021-06-06 00:19:27,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708802618] [2021-06-06 00:19:27,874 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-06 00:19:27,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:19:27,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-06 00:19:27,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=683, Unknown=0, NotChecked=0, Total=756 [2021-06-06 00:19:27,875 INFO L87 Difference]: Start difference. First operand 458 states and 1030 transitions. Second operand has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:19:29,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:19:29,558 INFO L93 Difference]: Finished difference Result 705 states and 1525 transitions. [2021-06-06 00:19:29,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-06 00:19:29,559 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-06 00:19:29,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:19:29,561 INFO L225 Difference]: With dead ends: 705 [2021-06-06 00:19:29,561 INFO L226 Difference]: Without dead ends: 684 [2021-06-06 00:19:29,562 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 994 ImplicationChecksByTransitivity, 1634.8ms TimeCoverageRelationStatistics Valid=434, Invalid=3598, Unknown=0, NotChecked=0, Total=4032 [2021-06-06 00:19:29,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 684 states. [2021-06-06 00:19:29,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 684 to 473. [2021-06-06 00:19:29,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 473 states, 472 states have (on average 2.264830508474576) internal successors, (1069), 472 states have internal predecessors, (1069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:19:29,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 473 states to 473 states and 1069 transitions. [2021-06-06 00:19:29,572 INFO L78 Accepts]: Start accepts. Automaton has 473 states and 1069 transitions. Word has length 29 [2021-06-06 00:19:29,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:19:29,572 INFO L482 AbstractCegarLoop]: Abstraction has 473 states and 1069 transitions. [2021-06-06 00:19:29,572 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:19:29,572 INFO L276 IsEmpty]: Start isEmpty. Operand 473 states and 1069 transitions. [2021-06-06 00:19:29,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-06 00:19:29,573 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:19:29,573 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:19:29,795 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:19:29,795 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:19:29,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:19:29,796 INFO L82 PathProgramCache]: Analyzing trace with hash -1384293639, now seen corresponding path program 22 times [2021-06-06 00:19:29,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:19:29,796 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19038316] [2021-06-06 00:19:29,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:19:29,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:19:29,991 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:19:29,991 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:19:29,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19038316] [2021-06-06 00:19:29,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [19038316] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:19:29,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1848491414] [2021-06-06 00:19:29,991 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-06 00:19:30,015 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:19:30,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:19:30,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-06 00:19:30,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:19:30,615 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:19:30,615 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1848491414] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:19:30,615 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:19:30,615 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 28 [2021-06-06 00:19:30,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504013436] [2021-06-06 00:19:30,616 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-06 00:19:30,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:19:30,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-06 00:19:30,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=738, Unknown=0, NotChecked=0, Total=812 [2021-06-06 00:19:30,617 INFO L87 Difference]: Start difference. First operand 473 states and 1069 transitions. Second operand has 29 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:19:32,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:19:32,428 INFO L93 Difference]: Finished difference Result 761 states and 1640 transitions. [2021-06-06 00:19:32,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-06 00:19:32,428 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-06 00:19:32,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:19:32,430 INFO L225 Difference]: With dead ends: 761 [2021-06-06 00:19:32,430 INFO L226 Difference]: Without dead ends: 749 [2021-06-06 00:19:32,431 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 783 ImplicationChecksByTransitivity, 1810.5ms TimeCoverageRelationStatistics Valid=354, Invalid=3186, Unknown=0, NotChecked=0, Total=3540 [2021-06-06 00:19:32,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 749 states. [2021-06-06 00:19:32,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 749 to 517. [2021-06-06 00:19:32,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 517 states, 516 states have (on average 2.294573643410853) internal successors, (1184), 516 states have internal predecessors, (1184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:19:32,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 517 states to 517 states and 1184 transitions. [2021-06-06 00:19:32,441 INFO L78 Accepts]: Start accepts. Automaton has 517 states and 1184 transitions. Word has length 29 [2021-06-06 00:19:32,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:19:32,441 INFO L482 AbstractCegarLoop]: Abstraction has 517 states and 1184 transitions. [2021-06-06 00:19:32,441 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:19:32,441 INFO L276 IsEmpty]: Start isEmpty. Operand 517 states and 1184 transitions. [2021-06-06 00:19:32,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-06 00:19:32,442 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:19:32,442 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:19:32,664 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:19:32,664 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:19:32,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:19:32,665 INFO L82 PathProgramCache]: Analyzing trace with hash 1179903925, now seen corresponding path program 23 times [2021-06-06 00:19:32,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:19:32,665 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741225894] [2021-06-06 00:19:32,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:19:32,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:19:32,888 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:19:32,888 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:19:32,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741225894] [2021-06-06 00:19:32,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741225894] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:19:32,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452957488] [2021-06-06 00:19:32,889 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-06 00:19:32,917 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-06 00:19:32,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:19:32,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-06 00:19:32,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:19:33,318 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:19:33,319 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1452957488] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:19:33,319 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:19:33,319 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 25 [2021-06-06 00:19:33,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102175855] [2021-06-06 00:19:33,319 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-06 00:19:33,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:19:33,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-06 00:19:33,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=552, Unknown=0, NotChecked=0, Total=650 [2021-06-06 00:19:33,320 INFO L87 Difference]: Start difference. First operand 517 states and 1184 transitions. Second operand has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 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) [2021-06-06 00:19:35,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:19:35,081 INFO L93 Difference]: Finished difference Result 1009 states and 2157 transitions. [2021-06-06 00:19:35,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-06 00:19:35,082 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 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 29 [2021-06-06 00:19:35,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:19:35,085 INFO L225 Difference]: With dead ends: 1009 [2021-06-06 00:19:35,085 INFO L226 Difference]: Without dead ends: 975 [2021-06-06 00:19:35,086 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1048 ImplicationChecksByTransitivity, 1646.9ms TimeCoverageRelationStatistics Valid=640, Invalid=3142, Unknown=0, NotChecked=0, Total=3782 [2021-06-06 00:19:35,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 975 states. [2021-06-06 00:19:35,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 975 to 489. [2021-06-06 00:19:35,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 489 states, 488 states have (on average 2.2684426229508197) internal successors, (1107), 488 states have internal predecessors, (1107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:19:35,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 489 states to 489 states and 1107 transitions. [2021-06-06 00:19:35,103 INFO L78 Accepts]: Start accepts. Automaton has 489 states and 1107 transitions. Word has length 29 [2021-06-06 00:19:35,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:19:35,103 INFO L482 AbstractCegarLoop]: Abstraction has 489 states and 1107 transitions. [2021-06-06 00:19:35,104 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 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) [2021-06-06 00:19:35,104 INFO L276 IsEmpty]: Start isEmpty. Operand 489 states and 1107 transitions. [2021-06-06 00:19:35,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-06 00:19:35,105 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:19:35,105 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:19:35,327 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:19:35,327 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:19:35,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:19:35,327 INFO L82 PathProgramCache]: Analyzing trace with hash -985517533, now seen corresponding path program 24 times [2021-06-06 00:19:35,327 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:19:35,327 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183155806] [2021-06-06 00:19:35,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:19:35,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:19:35,556 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:19:35,556 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:19:35,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183155806] [2021-06-06 00:19:35,557 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [183155806] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:19:35,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1531046787] [2021-06-06 00:19:35,557 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:19:35,587 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-06 00:19:35,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:19:35,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-06 00:19:35,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:19:36,157 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:19:36,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1531046787] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:19:36,158 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:19:36,158 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 28 [2021-06-06 00:19:36,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340292153] [2021-06-06 00:19:36,158 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-06 00:19:36,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:19:36,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-06 00:19:36,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=690, Unknown=0, NotChecked=0, Total=812 [2021-06-06 00:19:36,159 INFO L87 Difference]: Start difference. First operand 489 states and 1107 transitions. Second operand has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 28 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:19:37,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:19:37,463 INFO L93 Difference]: Finished difference Result 1174 states and 2556 transitions. [2021-06-06 00:19:37,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-06 00:19:37,464 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 28 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-06 00:19:37,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:19:37,466 INFO L225 Difference]: With dead ends: 1174 [2021-06-06 00:19:37,466 INFO L226 Difference]: Without dead ends: 1105 [2021-06-06 00:19:37,467 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 982 ImplicationChecksByTransitivity, 1393.5ms TimeCoverageRelationStatistics Valid=495, Invalid=2811, Unknown=0, NotChecked=0, Total=3306 [2021-06-06 00:19:37,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1105 states. [2021-06-06 00:19:37,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1105 to 560. [2021-06-06 00:19:37,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 560 states, 559 states have (on average 2.2772808586762077) internal successors, (1273), 559 states have internal predecessors, (1273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:19:37,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 560 states to 560 states and 1273 transitions. [2021-06-06 00:19:37,476 INFO L78 Accepts]: Start accepts. Automaton has 560 states and 1273 transitions. Word has length 31 [2021-06-06 00:19:37,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:19:37,476 INFO L482 AbstractCegarLoop]: Abstraction has 560 states and 1273 transitions. [2021-06-06 00:19:37,476 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 28 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:19:37,477 INFO L276 IsEmpty]: Start isEmpty. Operand 560 states and 1273 transitions. [2021-06-06 00:19:37,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-06 00:19:37,478 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:19:37,478 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:19:37,692 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable189,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:19:37,693 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:19:37,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:19:37,693 INFO L82 PathProgramCache]: Analyzing trace with hash -1484862347, now seen corresponding path program 25 times [2021-06-06 00:19:37,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:19:37,693 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353016394] [2021-06-06 00:19:37,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:19:37,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:19:37,911 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:19:37,911 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:19:37,911 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353016394] [2021-06-06 00:19:37,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1353016394] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:19:37,911 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1858242392] [2021-06-06 00:19:37,911 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:19:37,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:19:37,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-06 00:19:37,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:19:38,449 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:19:38,449 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1858242392] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:19:38,449 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:19:38,449 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 28 [2021-06-06 00:19:38,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797914204] [2021-06-06 00:19:38,450 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-06 00:19:38,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:19:38,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-06 00:19:38,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=697, Unknown=0, NotChecked=0, Total=812 [2021-06-06 00:19:38,451 INFO L87 Difference]: Start difference. First operand 560 states and 1273 transitions. Second operand has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 28 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:19:39,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:19:39,735 INFO L93 Difference]: Finished difference Result 1108 states and 2432 transitions. [2021-06-06 00:19:39,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-06 00:19:39,736 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 28 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-06 00:19:39,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:19:39,740 INFO L225 Difference]: With dead ends: 1108 [2021-06-06 00:19:39,740 INFO L226 Difference]: Without dead ends: 1051 [2021-06-06 00:19:39,741 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 868 ImplicationChecksByTransitivity, 1344.7ms TimeCoverageRelationStatistics Valid=432, Invalid=2538, Unknown=0, NotChecked=0, Total=2970 [2021-06-06 00:19:39,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1051 states. [2021-06-06 00:19:39,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1051 to 584. [2021-06-06 00:19:39,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 584 states, 583 states have (on average 2.2658662092624358) internal successors, (1321), 583 states have internal predecessors, (1321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:19:39,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 584 states to 584 states and 1321 transitions. [2021-06-06 00:19:39,751 INFO L78 Accepts]: Start accepts. Automaton has 584 states and 1321 transitions. Word has length 31 [2021-06-06 00:19:39,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:19:39,752 INFO L482 AbstractCegarLoop]: Abstraction has 584 states and 1321 transitions. [2021-06-06 00:19:39,752 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 28 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:19:39,752 INFO L276 IsEmpty]: Start isEmpty. Operand 584 states and 1321 transitions. [2021-06-06 00:19:39,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-06 00:19:39,753 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:19:39,753 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:19:39,975 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable205 [2021-06-06 00:19:39,975 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:19:39,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:19:39,975 INFO L82 PathProgramCache]: Analyzing trace with hash 1890433653, now seen corresponding path program 26 times [2021-06-06 00:19:39,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:19:39,976 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123424329] [2021-06-06 00:19:39,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:19:39,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:19:40,170 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:19:40,170 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:19:40,170 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123424329] [2021-06-06 00:19:40,170 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123424329] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:19:40,170 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122589105] [2021-06-06 00:19:40,170 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-06 00:19:40,194 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:19:40,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:19:40,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-06 00:19:40,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:19:40,788 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:19:40,789 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2122589105] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:19:40,789 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:19:40,789 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 28 [2021-06-06 00:19:40,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133790352] [2021-06-06 00:19:40,789 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-06 00:19:40,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:19:40,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-06 00:19:40,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=702, Unknown=0, NotChecked=0, Total=812 [2021-06-06 00:19:40,790 INFO L87 Difference]: Start difference. First operand 584 states and 1321 transitions. Second operand has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 28 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:19:42,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:19:42,393 INFO L93 Difference]: Finished difference Result 1217 states and 2662 transitions. [2021-06-06 00:19:42,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-06 00:19:42,393 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 28 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-06 00:19:42,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:19:42,397 INFO L225 Difference]: With dead ends: 1217 [2021-06-06 00:19:42,397 INFO L226 Difference]: Without dead ends: 1175 [2021-06-06 00:19:42,398 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1267 ImplicationChecksByTransitivity, 1678.8ms TimeCoverageRelationStatistics Valid=672, Invalid=3618, Unknown=0, NotChecked=0, Total=4290 [2021-06-06 00:19:42,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1175 states. [2021-06-06 00:19:42,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1175 to 651. [2021-06-06 00:19:42,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 651 states, 650 states have (on average 2.272307692307692) internal successors, (1477), 650 states have internal predecessors, (1477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:19:42,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 651 states to 651 states and 1477 transitions. [2021-06-06 00:19:42,410 INFO L78 Accepts]: Start accepts. Automaton has 651 states and 1477 transitions. Word has length 31 [2021-06-06 00:19:42,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:19:42,410 INFO L482 AbstractCegarLoop]: Abstraction has 651 states and 1477 transitions. [2021-06-06 00:19:42,410 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 28 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:19:42,410 INFO L276 IsEmpty]: Start isEmpty. Operand 651 states and 1477 transitions. [2021-06-06 00:19:42,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-06 00:19:42,411 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:19:42,411 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:19:42,621 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable219,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:19:42,621 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:19:42,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:19:42,621 INFO L82 PathProgramCache]: Analyzing trace with hash 1975277999, now seen corresponding path program 27 times [2021-06-06 00:19:42,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:19:42,621 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062941173] [2021-06-06 00:19:42,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:19:42,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:19:42,874 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:19:42,874 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:19:42,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062941173] [2021-06-06 00:19:42,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062941173] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:19:42,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875215817] [2021-06-06 00:19:42,875 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-06 00:19:42,913 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-06 00:19:42,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:19:42,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-06 00:19:42,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:19:43,452 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:19:43,453 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1875215817] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:19:43,453 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:19:43,453 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 28 [2021-06-06 00:19:43,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34918367] [2021-06-06 00:19:43,453 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-06 00:19:43,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:19:43,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-06 00:19:43,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=704, Unknown=0, NotChecked=0, Total=812 [2021-06-06 00:19:43,454 INFO L87 Difference]: Start difference. First operand 651 states and 1477 transitions. Second operand has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 28 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:19:45,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:19:45,064 INFO L93 Difference]: Finished difference Result 1268 states and 2780 transitions. [2021-06-06 00:19:45,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-06 00:19:45,065 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 28 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-06 00:19:45,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:19:45,068 INFO L225 Difference]: With dead ends: 1268 [2021-06-06 00:19:45,068 INFO L226 Difference]: Without dead ends: 1199 [2021-06-06 00:19:45,068 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1001 ImplicationChecksByTransitivity, 1648.6ms TimeCoverageRelationStatistics Valid=518, Invalid=3022, Unknown=0, NotChecked=0, Total=3540 [2021-06-06 00:19:45,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1199 states. [2021-06-06 00:19:45,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1199 to 655. [2021-06-06 00:19:45,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 655 states, 654 states have (on average 2.270642201834862) internal successors, (1485), 654 states have internal predecessors, (1485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:19:45,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 655 states to 655 states and 1485 transitions. [2021-06-06 00:19:45,080 INFO L78 Accepts]: Start accepts. Automaton has 655 states and 1485 transitions. Word has length 31 [2021-06-06 00:19:45,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:19:45,081 INFO L482 AbstractCegarLoop]: Abstraction has 655 states and 1485 transitions. [2021-06-06 00:19:45,081 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 28 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:19:45,081 INFO L276 IsEmpty]: Start isEmpty. Operand 655 states and 1485 transitions. [2021-06-06 00:19:45,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-06 00:19:45,082 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:19:45,082 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:19:45,296 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable236 [2021-06-06 00:19:45,297 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:19:45,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:19:45,297 INFO L82 PathProgramCache]: Analyzing trace with hash 1055606703, now seen corresponding path program 28 times [2021-06-06 00:19:45,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:19:45,297 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992631524] [2021-06-06 00:19:45,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:19:45,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:19:45,489 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:19:45,489 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:19:45,489 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992631524] [2021-06-06 00:19:45,489 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992631524] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:19:45,489 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1293396460] [2021-06-06 00:19:45,489 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:19:45,516 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:19:45,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:19:45,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-06 00:19:45,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:19:46,066 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:19:46,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1293396460] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:19:46,066 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:19:46,066 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 28 [2021-06-06 00:19:46,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505856058] [2021-06-06 00:19:46,066 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-06 00:19:46,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:19:46,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-06 00:19:46,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=707, Unknown=0, NotChecked=0, Total=812 [2021-06-06 00:19:46,067 INFO L87 Difference]: Start difference. First operand 655 states and 1485 transitions. Second operand has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 28 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:19:47,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:19:47,925 INFO L93 Difference]: Finished difference Result 1427 states and 3120 transitions. [2021-06-06 00:19:47,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-06 00:19:47,925 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 28 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-06 00:19:47,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:19:47,929 INFO L225 Difference]: With dead ends: 1427 [2021-06-06 00:19:47,929 INFO L226 Difference]: Without dead ends: 1385 [2021-06-06 00:19:47,929 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1468 ImplicationChecksByTransitivity, 1911.1ms TimeCoverageRelationStatistics Valid=819, Invalid=4151, Unknown=0, NotChecked=0, Total=4970 [2021-06-06 00:19:47,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1385 states. [2021-06-06 00:19:47,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1385 to 664. [2021-06-06 00:19:47,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 664 states, 663 states have (on average 2.277526395173454) internal successors, (1510), 663 states have internal predecessors, (1510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:19:47,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 664 states to 664 states and 1510 transitions. [2021-06-06 00:19:47,941 INFO L78 Accepts]: Start accepts. Automaton has 664 states and 1510 transitions. Word has length 31 [2021-06-06 00:19:47,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:19:47,941 INFO L482 AbstractCegarLoop]: Abstraction has 664 states and 1510 transitions. [2021-06-06 00:19:47,941 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 28 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:19:47,941 INFO L276 IsEmpty]: Start isEmpty. Operand 664 states and 1510 transitions. [2021-06-06 00:19:47,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-06 00:19:47,942 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:19:47,942 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:19:48,165 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable251,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:19:48,165 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:19:48,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:19:48,165 INFO L82 PathProgramCache]: Analyzing trace with hash 766958067, now seen corresponding path program 29 times [2021-06-06 00:19:48,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:19:48,165 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526180110] [2021-06-06 00:19:48,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:19:48,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:19:48,359 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:19:48,359 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:19:48,359 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526180110] [2021-06-06 00:19:48,359 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [526180110] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:19:48,359 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1188880980] [2021-06-06 00:19:48,359 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-06 00:19:48,383 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-06 00:19:48,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:19:48,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-06 00:19:48,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:19:48,837 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:19:48,837 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1188880980] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:19:48,837 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:19:48,837 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 28 [2021-06-06 00:19:48,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305058461] [2021-06-06 00:19:48,838 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-06 00:19:48,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:19:48,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-06 00:19:48,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=705, Unknown=0, NotChecked=0, Total=812 [2021-06-06 00:19:48,838 INFO L87 Difference]: Start difference. First operand 664 states and 1510 transitions. Second operand has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 28 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:19:51,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:19:51,682 INFO L93 Difference]: Finished difference Result 1966 states and 4209 transitions. [2021-06-06 00:19:51,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-06 00:19:51,683 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 28 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-06 00:19:51,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:19:51,689 INFO L225 Difference]: With dead ends: 1966 [2021-06-06 00:19:51,689 INFO L226 Difference]: Without dead ends: 1908 [2021-06-06 00:19:51,690 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2733 ImplicationChecksByTransitivity, 2667.4ms TimeCoverageRelationStatistics Valid=1278, Invalid=6912, Unknown=0, NotChecked=0, Total=8190 [2021-06-06 00:19:51,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1908 states. [2021-06-06 00:19:51,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1908 to 774. [2021-06-06 00:19:51,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 774 states, 773 states have (on average 2.2923673997412677) internal successors, (1772), 773 states have internal predecessors, (1772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:19:51,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 774 states to 774 states and 1772 transitions. [2021-06-06 00:19:51,708 INFO L78 Accepts]: Start accepts. Automaton has 774 states and 1772 transitions. Word has length 31 [2021-06-06 00:19:51,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:19:51,708 INFO L482 AbstractCegarLoop]: Abstraction has 774 states and 1772 transitions. [2021-06-06 00:19:51,708 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 28 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:19:51,708 INFO L276 IsEmpty]: Start isEmpty. Operand 774 states and 1772 transitions. [2021-06-06 00:19:51,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-06 00:19:51,710 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:19:51,710 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:19:51,916 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable266 [2021-06-06 00:19:51,917 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:19:51,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:19:51,917 INFO L82 PathProgramCache]: Analyzing trace with hash 497566775, now seen corresponding path program 30 times [2021-06-06 00:19:51,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:19:51,917 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361291117] [2021-06-06 00:19:51,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:19:51,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:19:52,086 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:19:52,086 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:19:52,086 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361291117] [2021-06-06 00:19:52,086 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361291117] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:19:52,086 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1106950057] [2021-06-06 00:19:52,086 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:19:52,125 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-06 00:19:52,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:19:52,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-06 00:19:52,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:19:52,611 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:19:52,611 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1106950057] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:19:52,612 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:19:52,612 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 25 [2021-06-06 00:19:52,612 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047081398] [2021-06-06 00:19:52,612 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-06 00:19:52,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:19:52,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-06 00:19:52,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=550, Unknown=0, NotChecked=0, Total=650 [2021-06-06 00:19:52,612 INFO L87 Difference]: Start difference. First operand 774 states and 1772 transitions. Second operand has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 25 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:19:53,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:19:53,938 INFO L93 Difference]: Finished difference Result 1633 states and 3659 transitions. [2021-06-06 00:19:53,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-06 00:19:53,939 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 25 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-06 00:19:53,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:19:53,942 INFO L225 Difference]: With dead ends: 1633 [2021-06-06 00:19:53,942 INFO L226 Difference]: Without dead ends: 1633 [2021-06-06 00:19:53,942 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 862 ImplicationChecksByTransitivity, 1427.0ms TimeCoverageRelationStatistics Valid=646, Invalid=2660, Unknown=0, NotChecked=0, Total=3306 [2021-06-06 00:19:53,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1633 states. [2021-06-06 00:19:53,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1633 to 814. [2021-06-06 00:19:53,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 814 states, 813 states have (on average 2.2976629766297663) internal successors, (1868), 813 states have internal predecessors, (1868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:19:53,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 814 states to 814 states and 1868 transitions. [2021-06-06 00:19:53,958 INFO L78 Accepts]: Start accepts. Automaton has 814 states and 1868 transitions. Word has length 31 [2021-06-06 00:19:53,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:19:53,958 INFO L482 AbstractCegarLoop]: Abstraction has 814 states and 1868 transitions. [2021-06-06 00:19:53,959 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 25 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:19:53,959 INFO L276 IsEmpty]: Start isEmpty. Operand 814 states and 1868 transitions. [2021-06-06 00:19:53,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-06 00:19:53,961 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:19:53,961 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:19:54,176 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable281,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:19:54,177 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:19:54,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:19:54,177 INFO L82 PathProgramCache]: Analyzing trace with hash 1094746873, now seen corresponding path program 31 times [2021-06-06 00:19:54,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:19:54,177 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581645747] [2021-06-06 00:19:54,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:19:54,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:19:54,465 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:19:54,465 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:19:54,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581645747] [2021-06-06 00:19:54,466 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581645747] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:19:54,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [387477781] [2021-06-06 00:19:54,466 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-06 00:19:54,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:19:54,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-06 00:19:54,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:19:54,825 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:19:54,825 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [387477781] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:19:54,825 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:19:54,825 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-06-06 00:19:54,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808530495] [2021-06-06 00:19:54,826 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-06 00:19:54,826 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:19:54,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-06 00:19:54,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=583, Unknown=0, NotChecked=0, Total=650 [2021-06-06 00:19:54,826 INFO L87 Difference]: Start difference. First operand 814 states and 1868 transitions. Second operand has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 26 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:19:58,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:19:58,037 INFO L93 Difference]: Finished difference Result 1582 states and 3436 transitions. [2021-06-06 00:19:58,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-06-06 00:19:58,037 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 26 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-06 00:19:58,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:19:58,040 INFO L225 Difference]: With dead ends: 1582 [2021-06-06 00:19:58,040 INFO L226 Difference]: Without dead ends: 1525 [2021-06-06 00:19:58,041 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2531 ImplicationChecksByTransitivity, 2900.4ms TimeCoverageRelationStatistics Valid=908, Invalid=7464, Unknown=0, NotChecked=0, Total=8372 [2021-06-06 00:19:58,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1525 states. [2021-06-06 00:19:58,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1525 to 860. [2021-06-06 00:19:58,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 860 states, 859 states have (on average 2.2980209545983703) internal successors, (1974), 859 states have internal predecessors, (1974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:19:58,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 860 states to 860 states and 1974 transitions. [2021-06-06 00:19:58,057 INFO L78 Accepts]: Start accepts. Automaton has 860 states and 1974 transitions. Word has length 31 [2021-06-06 00:19:58,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:19:58,057 INFO L482 AbstractCegarLoop]: Abstraction has 860 states and 1974 transitions. [2021-06-06 00:19:58,057 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 26 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:19:58,057 INFO L276 IsEmpty]: Start isEmpty. Operand 860 states and 1974 transitions. [2021-06-06 00:19:58,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-06 00:19:58,059 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:19:58,059 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:19:58,272 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable296,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:19:58,273 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:19:58,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:19:58,273 INFO L82 PathProgramCache]: Analyzing trace with hash 175075577, now seen corresponding path program 32 times [2021-06-06 00:19:58,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:19:58,273 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067867720] [2021-06-06 00:19:58,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:19:58,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:19:58,503 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:19:58,503 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:19:58,503 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067867720] [2021-06-06 00:19:58,503 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067867720] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:19:58,503 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1514223341] [2021-06-06 00:19:58,503 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:19:58,525 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:19:58,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:19:58,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-06 00:19:58,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:19:59,108 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:19:59,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1514223341] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:19:59,109 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:19:59,109 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 28 [2021-06-06 00:19:59,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321909790] [2021-06-06 00:19:59,109 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-06 00:19:59,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:19:59,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-06 00:19:59,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=709, Unknown=0, NotChecked=0, Total=812 [2021-06-06 00:19:59,110 INFO L87 Difference]: Start difference. First operand 860 states and 1974 transitions. Second operand has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 28 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:20:02,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:20:02,580 INFO L93 Difference]: Finished difference Result 1889 states and 4109 transitions. [2021-06-06 00:20:02,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-06-06 00:20:02,580 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 28 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-06 00:20:02,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:20:02,583 INFO L225 Difference]: With dead ends: 1889 [2021-06-06 00:20:02,584 INFO L226 Difference]: Without dead ends: 1838 [2021-06-06 00:20:02,584 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3198 ImplicationChecksByTransitivity, 3366.3ms TimeCoverageRelationStatistics Valid=1421, Invalid=7891, Unknown=0, NotChecked=0, Total=9312 [2021-06-06 00:20:02,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1838 states. [2021-06-06 00:20:02,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1838 to 929. [2021-06-06 00:20:02,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 929 states, 928 states have (on average 2.3168103448275863) internal successors, (2150), 928 states have internal predecessors, (2150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:20:02,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 929 states to 929 states and 2150 transitions. [2021-06-06 00:20:02,603 INFO L78 Accepts]: Start accepts. Automaton has 929 states and 2150 transitions. Word has length 31 [2021-06-06 00:20:02,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:20:02,603 INFO L482 AbstractCegarLoop]: Abstraction has 929 states and 2150 transitions. [2021-06-06 00:20:02,603 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 28 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:20:02,603 INFO L276 IsEmpty]: Start isEmpty. Operand 929 states and 2150 transitions. [2021-06-06 00:20:02,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-06 00:20:02,605 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:20:02,605 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:20:02,824 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable303 [2021-06-06 00:20:02,825 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:20:02,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:20:02,825 INFO L82 PathProgramCache]: Analyzing trace with hash -1294394819, now seen corresponding path program 33 times [2021-06-06 00:20:02,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:20:02,825 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033895647] [2021-06-06 00:20:02,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:20:02,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:20:02,995 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:20:02,995 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:20:02,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033895647] [2021-06-06 00:20:02,996 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033895647] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:20:02,996 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2118653379] [2021-06-06 00:20:02,996 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-06 00:20:03,027 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-06 00:20:03,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:20:03,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-06 00:20:03,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:20:03,423 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:20:03,424 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2118653379] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:20:03,424 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:20:03,424 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-06 00:20:03,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830303804] [2021-06-06 00:20:03,424 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-06 00:20:03,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:20:03,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-06 00:20:03,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2021-06-06 00:20:03,425 INFO L87 Difference]: Start difference. First operand 929 states and 2150 transitions. Second operand has 25 states, 25 states have (on average 2.28) internal successors, (57), 24 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:20:04,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:20:04,833 INFO L93 Difference]: Finished difference Result 1635 states and 3656 transitions. [2021-06-06 00:20:04,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-06 00:20:04,834 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.28) internal successors, (57), 24 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-06 00:20:04,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:20:04,836 INFO L225 Difference]: With dead ends: 1635 [2021-06-06 00:20:04,836 INFO L226 Difference]: Without dead ends: 1635 [2021-06-06 00:20:04,837 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 855 ImplicationChecksByTransitivity, 1429.9ms TimeCoverageRelationStatistics Valid=631, Invalid=2675, Unknown=0, NotChecked=0, Total=3306 [2021-06-06 00:20:04,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1635 states. [2021-06-06 00:20:04,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1635 to 995. [2021-06-06 00:20:04,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 995 states, 994 states have (on average 2.3158953722334004) internal successors, (2302), 994 states have internal predecessors, (2302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:20:04,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 995 states to 995 states and 2302 transitions. [2021-06-06 00:20:04,849 INFO L78 Accepts]: Start accepts. Automaton has 995 states and 2302 transitions. Word has length 31 [2021-06-06 00:20:04,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:20:04,849 INFO L482 AbstractCegarLoop]: Abstraction has 995 states and 2302 transitions. [2021-06-06 00:20:04,849 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.28) internal successors, (57), 24 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:20:04,850 INFO L276 IsEmpty]: Start isEmpty. Operand 995 states and 2302 transitions. [2021-06-06 00:20:04,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-06 00:20:04,851 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:20:04,851 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:20:05,064 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable317,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:20:05,064 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:20:05,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:20:05,065 INFO L82 PathProgramCache]: Analyzing trace with hash 797857409, now seen corresponding path program 34 times [2021-06-06 00:20:05,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:20:05,065 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272584944] [2021-06-06 00:20:05,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:20:05,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:20:05,276 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:20:05,276 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:20:05,276 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272584944] [2021-06-06 00:20:05,276 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272584944] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:20:05,276 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [923042008] [2021-06-06 00:20:05,276 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:20:05,300 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:20:05,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:20:05,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-06 00:20:05,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:20:05,851 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:20:05,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [923042008] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:20:05,851 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:20:05,851 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 27 [2021-06-06 00:20:05,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094174959] [2021-06-06 00:20:05,851 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-06 00:20:05,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:20:05,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-06 00:20:05,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=655, Unknown=0, NotChecked=0, Total=756 [2021-06-06 00:20:05,852 INFO L87 Difference]: Start difference. First operand 995 states and 2302 transitions. Second operand has 28 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 27 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:20:09,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:20:09,133 INFO L93 Difference]: Finished difference Result 2696 states and 5900 transitions. [2021-06-06 00:20:09,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-06 00:20:09,134 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 27 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-06 00:20:09,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:20:09,137 INFO L225 Difference]: With dead ends: 2696 [2021-06-06 00:20:09,137 INFO L226 Difference]: Without dead ends: 2642 [2021-06-06 00:20:09,138 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2427 ImplicationChecksByTransitivity, 3044.2ms TimeCoverageRelationStatistics Valid=1212, Invalid=6444, Unknown=0, NotChecked=0, Total=7656 [2021-06-06 00:20:09,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2642 states. [2021-06-06 00:20:09,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2642 to 1189. [2021-06-06 00:20:09,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1189 states, 1188 states have (on average 2.3526936026936025) internal successors, (2795), 1188 states have internal predecessors, (2795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:20:09,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1189 states to 1189 states and 2795 transitions. [2021-06-06 00:20:09,158 INFO L78 Accepts]: Start accepts. Automaton has 1189 states and 2795 transitions. Word has length 31 [2021-06-06 00:20:09,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:20:09,158 INFO L482 AbstractCegarLoop]: Abstraction has 1189 states and 2795 transitions. [2021-06-06 00:20:09,158 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 27 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:20:09,158 INFO L276 IsEmpty]: Start isEmpty. Operand 1189 states and 2795 transitions. [2021-06-06 00:20:09,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-06 00:20:09,160 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:20:09,160 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:20:09,370 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable333 [2021-06-06 00:20:09,370 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:20:09,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:20:09,371 INFO L82 PathProgramCache]: Analyzing trace with hash 67491499, now seen corresponding path program 35 times [2021-06-06 00:20:09,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:20:09,371 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956170811] [2021-06-06 00:20:09,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:20:09,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:20:09,524 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 7 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:20:09,524 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:20:09,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956170811] [2021-06-06 00:20:09,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956170811] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:20:09,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [39780931] [2021-06-06 00:20:09,525 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:20:09,560 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-06 00:20:09,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:20:09,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-06 00:20:09,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:20:09,762 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 11 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:20:09,763 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [39780931] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:20:09,763 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:20:09,763 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 22 [2021-06-06 00:20:09,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435907318] [2021-06-06 00:20:09,764 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-06 00:20:09,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:20:09,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-06 00:20:09,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2021-06-06 00:20:09,765 INFO L87 Difference]: Start difference. First operand 1189 states and 2795 transitions. Second operand has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:20:11,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:20:11,858 INFO L93 Difference]: Finished difference Result 2304 states and 5171 transitions. [2021-06-06 00:20:11,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-06-06 00:20:11,859 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-06 00:20:11,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:20:11,862 INFO L225 Difference]: With dead ends: 2304 [2021-06-06 00:20:11,862 INFO L226 Difference]: Without dead ends: 2208 [2021-06-06 00:20:11,863 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2449 ImplicationChecksByTransitivity, 1799.0ms TimeCoverageRelationStatistics Valid=1219, Invalid=6263, Unknown=0, NotChecked=0, Total=7482 [2021-06-06 00:20:11,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2208 states. [2021-06-06 00:20:11,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2208 to 1478. [2021-06-06 00:20:11,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1478 states, 1477 states have (on average 2.360866621530129) internal successors, (3487), 1477 states have internal predecessors, (3487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:20:11,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1478 states to 1478 states and 3487 transitions. [2021-06-06 00:20:11,888 INFO L78 Accepts]: Start accepts. Automaton has 1478 states and 3487 transitions. Word has length 31 [2021-06-06 00:20:11,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:20:11,888 INFO L482 AbstractCegarLoop]: Abstraction has 1478 states and 3487 transitions. [2021-06-06 00:20:11,889 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:20:11,889 INFO L276 IsEmpty]: Start isEmpty. Operand 1478 states and 3487 transitions. [2021-06-06 00:20:11,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-06 00:20:11,891 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:20:11,891 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:20:12,112 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable349,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:20:12,113 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:20:12,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:20:12,113 INFO L82 PathProgramCache]: Analyzing trace with hash 735083257, now seen corresponding path program 36 times [2021-06-06 00:20:12,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:20:12,113 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395442151] [2021-06-06 00:20:12,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:20:12,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:20:12,304 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:20:12,304 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:20:12,304 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395442151] [2021-06-06 00:20:12,304 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395442151] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:20:12,304 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1503695570] [2021-06-06 00:20:12,304 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:20:12,333 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-06 00:20:12,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:20:12,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-06 00:20:12,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:20:12,829 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:20:12,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1503695570] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:20:12,830 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:20:12,830 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 28 [2021-06-06 00:20:12,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925451786] [2021-06-06 00:20:12,830 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-06 00:20:12,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:20:12,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-06 00:20:12,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=706, Unknown=0, NotChecked=0, Total=812 [2021-06-06 00:20:12,830 INFO L87 Difference]: Start difference. First operand 1478 states and 3487 transitions. Second operand has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 28 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:20:13,478 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 32 [2021-06-06 00:20:15,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:20:15,200 INFO L93 Difference]: Finished difference Result 2856 states and 6422 transitions. [2021-06-06 00:20:15,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-06 00:20:15,200 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 28 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-06 00:20:15,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:20:15,205 INFO L225 Difference]: With dead ends: 2856 [2021-06-06 00:20:15,205 INFO L226 Difference]: Without dead ends: 2771 [2021-06-06 00:20:15,206 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2134 ImplicationChecksByTransitivity, 2340.5ms TimeCoverageRelationStatistics Valid=852, Invalid=5468, Unknown=0, NotChecked=0, Total=6320 [2021-06-06 00:20:15,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2771 states. [2021-06-06 00:20:15,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2771 to 1636. [2021-06-06 00:20:15,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1636 states, 1635 states have (on average 2.3559633027522935) internal successors, (3852), 1635 states have internal predecessors, (3852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:20:15,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1636 states to 1636 states and 3852 transitions. [2021-06-06 00:20:15,235 INFO L78 Accepts]: Start accepts. Automaton has 1636 states and 3852 transitions. Word has length 31 [2021-06-06 00:20:15,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:20:15,235 INFO L482 AbstractCegarLoop]: Abstraction has 1636 states and 3852 transitions. [2021-06-06 00:20:15,235 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 28 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:20:15,236 INFO L276 IsEmpty]: Start isEmpty. Operand 1636 states and 3852 transitions. [2021-06-06 00:20:15,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-06 00:20:15,238 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:20:15,238 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:20:15,460 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable357 [2021-06-06 00:20:15,461 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:20:15,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:20:15,461 INFO L82 PathProgramCache]: Analyzing trace with hash 1903077501, now seen corresponding path program 37 times [2021-06-06 00:20:15,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:20:15,461 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571236018] [2021-06-06 00:20:15,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:20:15,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:20:15,720 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:20:15,720 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:20:15,720 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571236018] [2021-06-06 00:20:15,721 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571236018] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:20:15,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [889432680] [2021-06-06 00:20:15,721 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-06 00:20:15,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:20:15,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-06 00:20:15,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:20:16,402 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:20:16,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [889432680] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:20:16,402 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:20:16,402 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 28 [2021-06-06 00:20:16,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123041440] [2021-06-06 00:20:16,402 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-06 00:20:16,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:20:16,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-06 00:20:16,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=708, Unknown=0, NotChecked=0, Total=812 [2021-06-06 00:20:16,403 INFO L87 Difference]: Start difference. First operand 1636 states and 3852 transitions. Second operand has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 28 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:20:20,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:20:20,363 INFO L93 Difference]: Finished difference Result 3900 states and 8693 transitions. [2021-06-06 00:20:20,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-06-06 00:20:20,363 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 28 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-06 00:20:20,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:20:20,369 INFO L225 Difference]: With dead ends: 3900 [2021-06-06 00:20:20,369 INFO L226 Difference]: Without dead ends: 3784 [2021-06-06 00:20:20,370 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4357 ImplicationChecksByTransitivity, 3655.8ms TimeCoverageRelationStatistics Valid=1538, Invalid=10452, Unknown=0, NotChecked=0, Total=11990 [2021-06-06 00:20:20,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3784 states. [2021-06-06 00:20:20,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3784 to 1899. [2021-06-06 00:20:20,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1899 states, 1898 states have (on average 2.403582718651212) internal successors, (4562), 1898 states have internal predecessors, (4562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:20:20,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1899 states to 1899 states and 4562 transitions. [2021-06-06 00:20:20,405 INFO L78 Accepts]: Start accepts. Automaton has 1899 states and 4562 transitions. Word has length 31 [2021-06-06 00:20:20,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:20:20,405 INFO L482 AbstractCegarLoop]: Abstraction has 1899 states and 4562 transitions. [2021-06-06 00:20:20,406 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 28 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:20:20,406 INFO L276 IsEmpty]: Start isEmpty. Operand 1899 states and 4562 transitions. [2021-06-06 00:20:20,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-06 00:20:20,408 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:20:20,408 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:20:20,631 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable374 [2021-06-06 00:20:20,631 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:20:20,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:20:20,631 INFO L82 PathProgramCache]: Analyzing trace with hash 983406205, now seen corresponding path program 38 times [2021-06-06 00:20:20,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:20:20,631 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026958417] [2021-06-06 00:20:20,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:20:20,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:20:20,860 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:20:20,860 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:20:20,860 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026958417] [2021-06-06 00:20:20,860 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026958417] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:20:20,860 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635421780] [2021-06-06 00:20:20,860 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:20:20,883 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:20:20,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:20:20,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-06 00:20:20,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:20:21,442 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:20:21,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [635421780] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:20:21,443 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:20:21,443 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 28 [2021-06-06 00:20:21,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304715993] [2021-06-06 00:20:21,443 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-06 00:20:21,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:20:21,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-06 00:20:21,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=711, Unknown=0, NotChecked=0, Total=812 [2021-06-06 00:20:21,443 INFO L87 Difference]: Start difference. First operand 1899 states and 4562 transitions. Second operand has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 28 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:20:24,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:20:24,873 INFO L93 Difference]: Finished difference Result 3505 states and 7977 transitions. [2021-06-06 00:20:24,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-06-06 00:20:24,874 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 28 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-06 00:20:24,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:20:24,879 INFO L225 Difference]: With dead ends: 3505 [2021-06-06 00:20:24,879 INFO L226 Difference]: Without dead ends: 3426 [2021-06-06 00:20:24,880 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2945 ImplicationChecksByTransitivity, 3286.6ms TimeCoverageRelationStatistics Valid=1212, Invalid=7530, Unknown=0, NotChecked=0, Total=8742 [2021-06-06 00:20:24,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3426 states. [2021-06-06 00:20:24,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3426 to 1879. [2021-06-06 00:20:24,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1879 states, 1878 states have (on average 2.3998935037273696) internal successors, (4507), 1878 states have internal predecessors, (4507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:20:24,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1879 states to 1879 states and 4507 transitions. [2021-06-06 00:20:24,917 INFO L78 Accepts]: Start accepts. Automaton has 1879 states and 4507 transitions. Word has length 31 [2021-06-06 00:20:24,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:20:24,917 INFO L482 AbstractCegarLoop]: Abstraction has 1879 states and 4507 transitions. [2021-06-06 00:20:24,917 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 28 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:20:24,917 INFO L276 IsEmpty]: Start isEmpty. Operand 1879 states and 4507 transitions. [2021-06-06 00:20:24,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-06 00:20:24,920 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:20:24,920 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:20:25,132 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable388 [2021-06-06 00:20:25,133 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:20:25,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:20:25,133 INFO L82 PathProgramCache]: Analyzing trace with hash -486064191, now seen corresponding path program 39 times [2021-06-06 00:20:25,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:20:25,133 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116066277] [2021-06-06 00:20:25,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:20:25,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:20:25,284 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:20:25,285 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:20:25,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116066277] [2021-06-06 00:20:25,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116066277] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:20:25,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659546440] [2021-06-06 00:20:25,285 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:20:25,310 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-06 00:20:25,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:20:25,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-06 00:20:25,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:20:25,685 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:20:25,685 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1659546440] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:20:25,685 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:20:25,685 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-06 00:20:25,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42387198] [2021-06-06 00:20:25,686 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-06 00:20:25,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:20:25,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-06 00:20:25,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=508, Unknown=0, NotChecked=0, Total=600 [2021-06-06 00:20:25,686 INFO L87 Difference]: Start difference. First operand 1879 states and 4507 transitions. Second operand has 25 states, 25 states have (on average 2.28) internal successors, (57), 24 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:20:27,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:20:27,346 INFO L93 Difference]: Finished difference Result 3076 states and 7034 transitions. [2021-06-06 00:20:27,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-06 00:20:27,347 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.28) internal successors, (57), 24 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-06 00:20:27,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:20:27,349 INFO L225 Difference]: With dead ends: 3076 [2021-06-06 00:20:27,349 INFO L226 Difference]: Without dead ends: 3052 [2021-06-06 00:20:27,350 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1177 ImplicationChecksByTransitivity, 1605.3ms TimeCoverageRelationStatistics Valid=823, Invalid=3337, Unknown=0, NotChecked=0, Total=4160 [2021-06-06 00:20:27,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3052 states. [2021-06-06 00:20:27,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3052 to 1766. [2021-06-06 00:20:27,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1766 states, 1765 states have (on average 2.3507082152974506) internal successors, (4149), 1765 states have internal predecessors, (4149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:20:27,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1766 states to 1766 states and 4149 transitions. [2021-06-06 00:20:27,371 INFO L78 Accepts]: Start accepts. Automaton has 1766 states and 4149 transitions. Word has length 31 [2021-06-06 00:20:27,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:20:27,371 INFO L482 AbstractCegarLoop]: Abstraction has 1766 states and 4149 transitions. [2021-06-06 00:20:27,371 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.28) internal successors, (57), 24 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:20:27,371 INFO L276 IsEmpty]: Start isEmpty. Operand 1766 states and 4149 transitions. [2021-06-06 00:20:27,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-06 00:20:27,373 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:20:27,373 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:20:27,573 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable403 [2021-06-06 00:20:27,573 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:20:27,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:20:27,574 INFO L82 PathProgramCache]: Analyzing trace with hash 2101275627, now seen corresponding path program 40 times [2021-06-06 00:20:27,574 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:20:27,574 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563926434] [2021-06-06 00:20:27,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:20:27,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:20:27,668 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 12 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:20:27,669 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:20:27,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563926434] [2021-06-06 00:20:27,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563926434] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:20:27,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203283711] [2021-06-06 00:20:27,669 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:20:27,698 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:20:27,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:20:27,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-06 00:20:27,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:20:28,000 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 8 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:20:28,000 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [203283711] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:20:28,000 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:20:28,000 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 23 [2021-06-06 00:20:28,000 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34723178] [2021-06-06 00:20:28,000 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-06 00:20:28,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:20:28,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-06 00:20:28,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=449, Unknown=0, NotChecked=0, Total=552 [2021-06-06 00:20:28,001 INFO L87 Difference]: Start difference. First operand 1766 states and 4149 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 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) [2021-06-06 00:20:29,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:20:29,040 INFO L93 Difference]: Finished difference Result 2592 states and 5918 transitions. [2021-06-06 00:20:29,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-06 00:20:29,041 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 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 31 [2021-06-06 00:20:29,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:20:29,043 INFO L225 Difference]: With dead ends: 2592 [2021-06-06 00:20:29,043 INFO L226 Difference]: Without dead ends: 2588 [2021-06-06 00:20:29,044 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1218 ImplicationChecksByTransitivity, 938.9ms TimeCoverageRelationStatistics Valid=776, Invalid=3256, Unknown=0, NotChecked=0, Total=4032 [2021-06-06 00:20:29,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2588 states. [2021-06-06 00:20:29,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2588 to 1706. [2021-06-06 00:20:29,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1706 states, 1705 states have (on average 2.3530791788856305) internal successors, (4012), 1705 states have internal predecessors, (4012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:20:29,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1706 states to 1706 states and 4012 transitions. [2021-06-06 00:20:29,071 INFO L78 Accepts]: Start accepts. Automaton has 1706 states and 4012 transitions. Word has length 31 [2021-06-06 00:20:29,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:20:29,071 INFO L482 AbstractCegarLoop]: Abstraction has 1706 states and 4012 transitions. [2021-06-06 00:20:29,071 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 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) [2021-06-06 00:20:29,071 INFO L276 IsEmpty]: Start isEmpty. Operand 1706 states and 4012 transitions. [2021-06-06 00:20:29,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-06 00:20:29,073 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:20:29,073 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:20:29,295 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable420,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:20:29,295 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:20:29,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:20:29,295 INFO L82 PathProgramCache]: Analyzing trace with hash 1605471457, now seen corresponding path program 41 times [2021-06-06 00:20:29,296 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:20:29,296 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125860368] [2021-06-06 00:20:29,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:20:29,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:20:29,400 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:20:29,400 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:20:29,401 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125860368] [2021-06-06 00:20:29,401 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125860368] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:20:29,401 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [177357601] [2021-06-06 00:20:29,401 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:20:29,439 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-06 00:20:29,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:20:29,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-06 00:20:29,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:20:29,817 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:20:29,818 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [177357601] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:20:29,818 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:20:29,818 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 27 [2021-06-06 00:20:29,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059826733] [2021-06-06 00:20:29,818 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-06 00:20:29,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:20:29,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-06 00:20:29,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=623, Unknown=0, NotChecked=0, Total=756 [2021-06-06 00:20:29,819 INFO L87 Difference]: Start difference. First operand 1706 states and 4012 transitions. Second operand has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 27 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:20:31,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:20:31,038 INFO L93 Difference]: Finished difference Result 3118 states and 6999 transitions. [2021-06-06 00:20:31,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-06 00:20:31,038 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 27 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-06 00:20:31,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:20:31,040 INFO L225 Difference]: With dead ends: 3118 [2021-06-06 00:20:31,040 INFO L226 Difference]: Without dead ends: 3109 [2021-06-06 00:20:31,041 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1404 ImplicationChecksByTransitivity, 1167.2ms TimeCoverageRelationStatistics Valid=1134, Invalid=3836, Unknown=0, NotChecked=0, Total=4970 [2021-06-06 00:20:31,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3109 states. [2021-06-06 00:20:31,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3109 to 1341. [2021-06-06 00:20:31,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1341 states, 1340 states have (on average 2.2753731343283583) internal successors, (3049), 1340 states have internal predecessors, (3049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:20:31,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1341 states to 1341 states and 3049 transitions. [2021-06-06 00:20:31,065 INFO L78 Accepts]: Start accepts. Automaton has 1341 states and 3049 transitions. Word has length 33 [2021-06-06 00:20:31,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:20:31,065 INFO L482 AbstractCegarLoop]: Abstraction has 1341 states and 3049 transitions. [2021-06-06 00:20:31,065 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 27 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:20:31,065 INFO L276 IsEmpty]: Start isEmpty. Operand 1341 states and 3049 transitions. [2021-06-06 00:20:31,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-06 00:20:31,067 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:20:31,067 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:20:31,289 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable434 [2021-06-06 00:20:31,289 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:20:31,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:20:31,289 INFO L82 PathProgramCache]: Analyzing trace with hash -755955681, now seen corresponding path program 42 times [2021-06-06 00:20:31,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:20:31,289 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155995852] [2021-06-06 00:20:31,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:20:31,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:20:31,349 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 21 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:20:31,349 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:20:31,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155995852] [2021-06-06 00:20:31,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1155995852] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:20:31,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [630245273] [2021-06-06 00:20:31,350 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:20:31,384 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-06 00:20:31,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:20:31,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-06 00:20:31,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:20:31,668 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:20:31,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [630245273] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:20:31,669 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:20:31,669 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 15] total 22 [2021-06-06 00:20:31,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226302672] [2021-06-06 00:20:31,669 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-06 00:20:31,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:20:31,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-06 00:20:31,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2021-06-06 00:20:31,669 INFO L87 Difference]: Start difference. First operand 1341 states and 3049 transitions. Second operand has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 22 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:20:33,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:20:33,211 INFO L93 Difference]: Finished difference Result 1686 states and 3705 transitions. [2021-06-06 00:20:33,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-06 00:20:33,211 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 22 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-06 00:20:33,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:20:33,212 INFO L225 Difference]: With dead ends: 1686 [2021-06-06 00:20:33,212 INFO L226 Difference]: Without dead ends: 1682 [2021-06-06 00:20:33,213 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2275 ImplicationChecksByTransitivity, 1486.3ms TimeCoverageRelationStatistics Valid=1570, Invalid=5236, Unknown=0, NotChecked=0, Total=6806 [2021-06-06 00:20:33,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1682 states. [2021-06-06 00:20:33,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1682 to 953. [2021-06-06 00:20:33,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 953 states, 952 states have (on average 2.277310924369748) internal successors, (2168), 952 states have internal predecessors, (2168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:20:33,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 953 states to 953 states and 2168 transitions. [2021-06-06 00:20:33,223 INFO L78 Accepts]: Start accepts. Automaton has 953 states and 2168 transitions. Word has length 33 [2021-06-06 00:20:33,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:20:33,223 INFO L482 AbstractCegarLoop]: Abstraction has 953 states and 2168 transitions. [2021-06-06 00:20:33,223 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 22 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:20:33,223 INFO L276 IsEmpty]: Start isEmpty. Operand 953 states and 2168 transitions. [2021-06-06 00:20:33,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-06 00:20:33,224 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:20:33,224 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:20:33,424 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable447,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:20:33,425 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:20:33,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:20:33,425 INFO L82 PathProgramCache]: Analyzing trace with hash 1705903345, now seen corresponding path program 43 times [2021-06-06 00:20:33,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:20:33,425 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787638901] [2021-06-06 00:20:33,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:20:33,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:20:33,666 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:20:33,667 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:20:33,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787638901] [2021-06-06 00:20:33,667 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787638901] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:20:33,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [888088523] [2021-06-06 00:20:33,667 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:20:33,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:20:33,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-06 00:20:33,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:20:34,285 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:20:34,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [888088523] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:20:34,285 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:20:34,285 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-06 00:20:34,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160029977] [2021-06-06 00:20:34,285 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-06 00:20:34,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:20:34,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-06 00:20:34,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=976, Unknown=0, NotChecked=0, Total=1056 [2021-06-06 00:20:34,286 INFO L87 Difference]: Start difference. First operand 953 states and 2168 transitions. Second operand has 33 states, 33 states have (on average 1.878787878787879) internal successors, (62), 32 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:20:36,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:20:36,456 INFO L93 Difference]: Finished difference Result 1262 states and 2779 transitions. [2021-06-06 00:20:36,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-06 00:20:36,457 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.878787878787879) internal successors, (62), 32 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-06 00:20:36,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:20:36,458 INFO L225 Difference]: With dead ends: 1262 [2021-06-06 00:20:36,458 INFO L226 Difference]: Without dead ends: 1211 [2021-06-06 00:20:36,464 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1035 ImplicationChecksByTransitivity, 2229.2ms TimeCoverageRelationStatistics Valid=429, Invalid=4401, Unknown=0, NotChecked=0, Total=4830 [2021-06-06 00:20:36,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1211 states. [2021-06-06 00:20:36,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1211 to 997. [2021-06-06 00:20:36,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 997 states, 996 states have (on average 2.2710843373493974) internal successors, (2262), 996 states have internal predecessors, (2262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:20:36,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 997 states to 997 states and 2262 transitions. [2021-06-06 00:20:36,473 INFO L78 Accepts]: Start accepts. Automaton has 997 states and 2262 transitions. Word has length 33 [2021-06-06 00:20:36,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:20:36,473 INFO L482 AbstractCegarLoop]: Abstraction has 997 states and 2262 transitions. [2021-06-06 00:20:36,473 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.878787878787879) internal successors, (62), 32 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:20:36,473 INFO L276 IsEmpty]: Start isEmpty. Operand 997 states and 2262 transitions. [2021-06-06 00:20:36,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-06 00:20:36,474 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:20:36,474 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:20:36,674 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable460,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:20:36,675 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:20:36,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:20:36,675 INFO L82 PathProgramCache]: Analyzing trace with hash -660596615, now seen corresponding path program 44 times [2021-06-06 00:20:36,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:20:36,675 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173752863] [2021-06-06 00:20:36,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:20:36,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:20:36,952 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:20:36,952 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:20:36,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173752863] [2021-06-06 00:20:36,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173752863] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:20:36,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1359605427] [2021-06-06 00:20:36,952 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:20:36,982 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:20:36,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:20:36,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-06 00:20:36,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:20:37,545 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:20:37,546 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1359605427] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:20:37,546 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:20:37,546 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-06 00:20:37,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496267981] [2021-06-06 00:20:37,546 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-06 00:20:37,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:20:37,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-06 00:20:37,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=969, Unknown=0, NotChecked=0, Total=1056 [2021-06-06 00:20:37,546 INFO L87 Difference]: Start difference. First operand 997 states and 2262 transitions. Second operand has 33 states, 33 states have (on average 1.878787878787879) internal successors, (62), 32 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:20:40,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:20:40,666 INFO L93 Difference]: Finished difference Result 1563 states and 3372 transitions. [2021-06-06 00:20:40,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-06-06 00:20:40,667 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.878787878787879) internal successors, (62), 32 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-06 00:20:40,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:20:40,668 INFO L225 Difference]: With dead ends: 1563 [2021-06-06 00:20:40,668 INFO L226 Difference]: Without dead ends: 1473 [2021-06-06 00:20:40,669 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2530 ImplicationChecksByTransitivity, 2914.8ms TimeCoverageRelationStatistics Valid=718, Invalid=8024, Unknown=0, NotChecked=0, Total=8742 [2021-06-06 00:20:40,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1473 states. [2021-06-06 00:20:40,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1473 to 1042. [2021-06-06 00:20:40,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1042 states, 1041 states have (on average 2.2632084534101824) internal successors, (2356), 1041 states have internal predecessors, (2356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:20:40,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1042 states to 1042 states and 2356 transitions. [2021-06-06 00:20:40,678 INFO L78 Accepts]: Start accepts. Automaton has 1042 states and 2356 transitions. Word has length 33 [2021-06-06 00:20:40,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:20:40,678 INFO L482 AbstractCegarLoop]: Abstraction has 1042 states and 2356 transitions. [2021-06-06 00:20:40,678 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.878787878787879) internal successors, (62), 32 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:20:40,678 INFO L276 IsEmpty]: Start isEmpty. Operand 1042 states and 2356 transitions. [2021-06-06 00:20:40,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-06 00:20:40,679 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:20:40,680 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:20:40,892 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable478 [2021-06-06 00:20:40,892 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:20:40,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:20:40,892 INFO L82 PathProgramCache]: Analyzing trace with hash 1395928629, now seen corresponding path program 45 times [2021-06-06 00:20:40,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:20:40,892 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748323093] [2021-06-06 00:20:40,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:20:40,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:20:41,134 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:20:41,134 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:20:41,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748323093] [2021-06-06 00:20:41,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748323093] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:20:41,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1518901572] [2021-06-06 00:20:41,134 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:20:41,165 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-06 00:20:41,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:20:41,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-06 00:20:41,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:20:41,708 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 6 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:20:41,708 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1518901572] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:20:41,708 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:20:41,709 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-06 00:20:41,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947596669] [2021-06-06 00:20:41,709 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-06 00:20:41,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:20:41,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-06 00:20:41,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=968, Unknown=0, NotChecked=0, Total=1056 [2021-06-06 00:20:41,709 INFO L87 Difference]: Start difference. First operand 1042 states and 2356 transitions. Second operand has 33 states, 33 states have (on average 1.878787878787879) internal successors, (62), 32 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:20:45,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:20:45,128 INFO L93 Difference]: Finished difference Result 1689 states and 3627 transitions. [2021-06-06 00:20:45,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2021-06-06 00:20:45,129 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.878787878787879) internal successors, (62), 32 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-06 00:20:45,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:20:45,130 INFO L225 Difference]: With dead ends: 1689 [2021-06-06 00:20:45,130 INFO L226 Difference]: Without dead ends: 1674 [2021-06-06 00:20:45,131 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3180 ImplicationChecksByTransitivity, 3082.9ms TimeCoverageRelationStatistics Valid=809, Invalid=9697, Unknown=0, NotChecked=0, Total=10506 [2021-06-06 00:20:45,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1674 states. [2021-06-06 00:20:45,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1674 to 1087. [2021-06-06 00:20:45,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1087 states, 1086 states have (on average 2.2808471454880292) internal successors, (2477), 1086 states have internal predecessors, (2477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:20:45,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1087 states to 1087 states and 2477 transitions. [2021-06-06 00:20:45,141 INFO L78 Accepts]: Start accepts. Automaton has 1087 states and 2477 transitions. Word has length 33 [2021-06-06 00:20:45,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:20:45,141 INFO L482 AbstractCegarLoop]: Abstraction has 1087 states and 2477 transitions. [2021-06-06 00:20:45,141 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.878787878787879) internal successors, (62), 32 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:20:45,141 INFO L276 IsEmpty]: Start isEmpty. Operand 1087 states and 2477 transitions. [2021-06-06 00:20:45,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-06 00:20:45,143 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:20:45,143 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:20:45,344 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable494,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:20:45,345 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:20:45,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:20:45,346 INFO L82 PathProgramCache]: Analyzing trace with hash -2066614151, now seen corresponding path program 46 times [2021-06-06 00:20:45,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:20:45,347 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669826206] [2021-06-06 00:20:45,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:20:45,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:20:45,573 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:20:45,573 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:20:45,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669826206] [2021-06-06 00:20:45,573 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669826206] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:20:45,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1928235480] [2021-06-06 00:20:45,573 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:20:45,597 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:20:45,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:20:45,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-06 00:20:45,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:20:46,153 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:20:46,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1928235480] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:20:46,153 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:20:46,153 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-06-06 00:20:46,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307772053] [2021-06-06 00:20:46,153 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-06 00:20:46,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:20:46,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-06 00:20:46,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=934, Unknown=0, NotChecked=0, Total=1056 [2021-06-06 00:20:46,154 INFO L87 Difference]: Start difference. First operand 1087 states and 2477 transitions. Second operand has 33 states, 33 states have (on average 1.8484848484848484) internal successors, (61), 32 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:20:48,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:20:48,243 INFO L93 Difference]: Finished difference Result 1528 states and 3365 transitions. [2021-06-06 00:20:48,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-06 00:20:48,243 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.8484848484848484) internal successors, (61), 32 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-06 00:20:48,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:20:48,244 INFO L225 Difference]: With dead ends: 1528 [2021-06-06 00:20:48,244 INFO L226 Difference]: Without dead ends: 1519 [2021-06-06 00:20:48,245 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2034 ImplicationChecksByTransitivity, 1960.6ms TimeCoverageRelationStatistics Valid=674, Invalid=5806, Unknown=0, NotChecked=0, Total=6480 [2021-06-06 00:20:48,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1519 states. [2021-06-06 00:20:48,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1519 to 1171. [2021-06-06 00:20:48,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1171 states, 1170 states have (on average 2.288034188034188) internal successors, (2677), 1170 states have internal predecessors, (2677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:20:48,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1171 states to 1171 states and 2677 transitions. [2021-06-06 00:20:48,256 INFO L78 Accepts]: Start accepts. Automaton has 1171 states and 2677 transitions. Word has length 33 [2021-06-06 00:20:48,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:20:48,256 INFO L482 AbstractCegarLoop]: Abstraction has 1171 states and 2677 transitions. [2021-06-06 00:20:48,256 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.8484848484848484) internal successors, (61), 32 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:20:48,256 INFO L276 IsEmpty]: Start isEmpty. Operand 1171 states and 2677 transitions. [2021-06-06 00:20:48,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-06 00:20:48,258 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:20:48,258 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:20:48,458 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable508,47 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:20:48,458 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:20:48,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:20:48,458 INFO L82 PathProgramCache]: Analyzing trace with hash 2099610557, now seen corresponding path program 47 times [2021-06-06 00:20:48,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:20:48,459 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200462986] [2021-06-06 00:20:48,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:20:48,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:20:48,694 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:20:48,694 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:20:48,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200462986] [2021-06-06 00:20:48,695 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1200462986] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:20:48,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [289606515] [2021-06-06 00:20:48,695 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-06 00:20:48,727 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-06 00:20:48,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:20:48,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-06 00:20:48,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:20:49,329 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:20:49,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [289606515] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:20:49,331 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:20:49,331 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-06 00:20:49,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439996285] [2021-06-06 00:20:49,331 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-06 00:20:49,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:20:49,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-06 00:20:49,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=972, Unknown=0, NotChecked=0, Total=1056 [2021-06-06 00:20:49,332 INFO L87 Difference]: Start difference. First operand 1171 states and 2677 transitions. Second operand has 33 states, 33 states have (on average 1.878787878787879) internal successors, (62), 32 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:20:53,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:20:53,820 INFO L93 Difference]: Finished difference Result 1919 states and 4191 transitions. [2021-06-06 00:20:53,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-06-06 00:20:53,820 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.878787878787879) internal successors, (62), 32 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-06 00:20:53,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:20:53,822 INFO L225 Difference]: With dead ends: 1919 [2021-06-06 00:20:53,822 INFO L226 Difference]: Without dead ends: 1913 [2021-06-06 00:20:53,822 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2979 ImplicationChecksByTransitivity, 4007.4ms TimeCoverageRelationStatistics Valid=1082, Invalid=9630, Unknown=0, NotChecked=0, Total=10712 [2021-06-06 00:20:53,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1913 states. [2021-06-06 00:20:53,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1913 to 1267. [2021-06-06 00:20:53,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1267 states, 1266 states have (on average 2.3183254344391786) internal successors, (2935), 1266 states have internal predecessors, (2935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:20:53,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1267 states to 1267 states and 2935 transitions. [2021-06-06 00:20:53,836 INFO L78 Accepts]: Start accepts. Automaton has 1267 states and 2935 transitions. Word has length 33 [2021-06-06 00:20:53,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:20:53,836 INFO L482 AbstractCegarLoop]: Abstraction has 1267 states and 2935 transitions. [2021-06-06 00:20:53,836 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.878787878787879) internal successors, (62), 32 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:20:53,836 INFO L276 IsEmpty]: Start isEmpty. Operand 1267 states and 2935 transitions. [2021-06-06 00:20:53,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-06 00:20:53,837 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:20:53,837 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:20:54,059 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable523,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:20:54,059 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:20:54,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:20:54,059 INFO L82 PathProgramCache]: Analyzing trace with hash -1545287769, now seen corresponding path program 48 times [2021-06-06 00:20:54,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:20:54,059 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343040828] [2021-06-06 00:20:54,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:20:54,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:20:54,290 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:20:54,290 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:20:54,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343040828] [2021-06-06 00:20:54,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343040828] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:20:54,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2120677967] [2021-06-06 00:20:54,290 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-06 00:20:54,326 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-06 00:20:54,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:20:54,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-06 00:20:54,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:20:55,008 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 6 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:20:55,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2120677967] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:20:55,008 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:20:55,008 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-06 00:20:55,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570358902] [2021-06-06 00:20:55,008 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-06 00:20:55,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:20:55,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-06 00:20:55,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=969, Unknown=0, NotChecked=0, Total=1056 [2021-06-06 00:20:55,009 INFO L87 Difference]: Start difference. First operand 1267 states and 2935 transitions. Second operand has 33 states, 33 states have (on average 1.8181818181818181) internal successors, (60), 32 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:20:57,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:20:57,398 INFO L93 Difference]: Finished difference Result 1626 states and 3636 transitions. [2021-06-06 00:20:57,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-06 00:20:57,398 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.8181818181818181) internal successors, (60), 32 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-06 00:20:57,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:20:57,400 INFO L225 Difference]: With dead ends: 1626 [2021-06-06 00:20:57,400 INFO L226 Difference]: Without dead ends: 1611 [2021-06-06 00:20:57,401 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1215 ImplicationChecksByTransitivity, 2382.1ms TimeCoverageRelationStatistics Valid=560, Invalid=4552, Unknown=0, NotChecked=0, Total=5112 [2021-06-06 00:20:57,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1611 states. [2021-06-06 00:20:57,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1611 to 1287. [2021-06-06 00:20:57,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1287 states, 1286 states have (on average 2.3195956454121305) internal successors, (2983), 1286 states have internal predecessors, (2983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:20:57,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1287 states to 1287 states and 2983 transitions. [2021-06-06 00:20:57,415 INFO L78 Accepts]: Start accepts. Automaton has 1287 states and 2983 transitions. Word has length 33 [2021-06-06 00:20:57,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:20:57,415 INFO L482 AbstractCegarLoop]: Abstraction has 1287 states and 2983 transitions. [2021-06-06 00:20:57,415 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.8181818181818181) internal successors, (60), 32 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:20:57,415 INFO L276 IsEmpty]: Start isEmpty. Operand 1287 states and 2983 transitions. [2021-06-06 00:20:57,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-06 00:20:57,416 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:20:57,416 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:20:57,617 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable539,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:20:57,617 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:20:57,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:20:57,617 INFO L82 PathProgramCache]: Analyzing trace with hash 497583413, now seen corresponding path program 49 times [2021-06-06 00:20:57,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:20:57,617 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295111962] [2021-06-06 00:20:57,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:20:57,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:20:57,886 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:20:57,886 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:20:57,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295111962] [2021-06-06 00:20:57,887 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295111962] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:20:57,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2038180763] [2021-06-06 00:20:57,887 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:20:57,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:20:57,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-06 00:20:57,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:20:58,217 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:20:58,217 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2038180763] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:20:58,217 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:20:58,218 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 12] total 27 [2021-06-06 00:20:58,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569867456] [2021-06-06 00:20:58,218 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-06 00:20:58,218 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:20:58,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-06 00:20:58,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=617, Unknown=0, NotChecked=0, Total=702 [2021-06-06 00:20:58,218 INFO L87 Difference]: Start difference. First operand 1287 states and 2983 transitions. Second operand has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 27 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:20:59,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:20:59,917 INFO L93 Difference]: Finished difference Result 1934 states and 4341 transitions. [2021-06-06 00:20:59,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-06 00:20:59,918 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 27 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-06 00:20:59,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:20:59,920 INFO L225 Difference]: With dead ends: 1934 [2021-06-06 00:20:59,920 INFO L226 Difference]: Without dead ends: 1918 [2021-06-06 00:20:59,920 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 873 ImplicationChecksByTransitivity, 1640.4ms TimeCoverageRelationStatistics Valid=491, Invalid=3049, Unknown=0, NotChecked=0, Total=3540 [2021-06-06 00:20:59,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1918 states. [2021-06-06 00:20:59,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1918 to 1287. [2021-06-06 00:20:59,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1287 states, 1286 states have (on average 2.3149300155520995) internal successors, (2977), 1286 states have internal predecessors, (2977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:20:59,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1287 states to 1287 states and 2977 transitions. [2021-06-06 00:20:59,934 INFO L78 Accepts]: Start accepts. Automaton has 1287 states and 2977 transitions. Word has length 33 [2021-06-06 00:20:59,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:20:59,934 INFO L482 AbstractCegarLoop]: Abstraction has 1287 states and 2977 transitions. [2021-06-06 00:20:59,934 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 27 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:20:59,934 INFO L276 IsEmpty]: Start isEmpty. Operand 1287 states and 2977 transitions. [2021-06-06 00:20:59,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-06 00:20:59,936 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:20:59,936 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:21:00,152 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable561,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:21:00,152 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:21:00,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:21:00,153 INFO L82 PathProgramCache]: Analyzing trace with hash 1527671729, now seen corresponding path program 50 times [2021-06-06 00:21:00,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:21:00,153 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132313943] [2021-06-06 00:21:00,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:21:00,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:21:00,415 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:21:00,416 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:21:00,416 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132313943] [2021-06-06 00:21:00,416 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132313943] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:21:00,416 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1953830656] [2021-06-06 00:21:00,416 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-06 00:21:00,439 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:21:00,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:21:00,440 WARN L261 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-06 00:21:00,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:21:01,250 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:21:01,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1953830656] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:21:01,251 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:21:01,251 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 33 [2021-06-06 00:21:01,251 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551212242] [2021-06-06 00:21:01,251 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-06 00:21:01,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:21:01,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-06 00:21:01,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1013, Unknown=0, NotChecked=0, Total=1122 [2021-06-06 00:21:01,252 INFO L87 Difference]: Start difference. First operand 1287 states and 2977 transitions. Second operand has 34 states, 34 states have (on average 1.8235294117647058) internal successors, (62), 33 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:21:03,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:21:03,432 INFO L93 Difference]: Finished difference Result 1543 states and 3469 transitions. [2021-06-06 00:21:03,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-06 00:21:03,433 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.8235294117647058) internal successors, (62), 33 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-06 00:21:03,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:21:03,434 INFO L225 Difference]: With dead ends: 1543 [2021-06-06 00:21:03,434 INFO L226 Difference]: Without dead ends: 1491 [2021-06-06 00:21:03,435 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1299 ImplicationChecksByTransitivity, 2300.9ms TimeCoverageRelationStatistics Valid=481, Invalid=4489, Unknown=0, NotChecked=0, Total=4970 [2021-06-06 00:21:03,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1491 states. [2021-06-06 00:21:03,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1491 to 1288. [2021-06-06 00:21:03,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1288 states, 1287 states have (on average 2.312354312354312) internal successors, (2976), 1287 states have internal predecessors, (2976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:21:03,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1288 states to 1288 states and 2976 transitions. [2021-06-06 00:21:03,454 INFO L78 Accepts]: Start accepts. Automaton has 1288 states and 2976 transitions. Word has length 33 [2021-06-06 00:21:03,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:21:03,454 INFO L482 AbstractCegarLoop]: Abstraction has 1288 states and 2976 transitions. [2021-06-06 00:21:03,455 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 1.8235294117647058) internal successors, (62), 33 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:21:03,455 INFO L276 IsEmpty]: Start isEmpty. Operand 1288 states and 2976 transitions. [2021-06-06 00:21:03,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-06 00:21:03,456 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:21:03,456 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:21:03,656 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable569 [2021-06-06 00:21:03,656 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:21:03,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:21:03,657 INFO L82 PathProgramCache]: Analyzing trace with hash 1040701503, now seen corresponding path program 51 times [2021-06-06 00:21:03,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:21:03,657 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820237569] [2021-06-06 00:21:03,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:21:03,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:21:03,930 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:21:03,931 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:21:03,931 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820237569] [2021-06-06 00:21:03,931 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [820237569] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:21:03,931 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1214265896] [2021-06-06 00:21:03,931 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:21:03,962 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-06 00:21:03,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:21:03,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-06 00:21:03,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:21:04,640 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 2 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:21:04,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1214265896] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:21:04,640 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:21:04,640 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-06 00:21:04,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515102088] [2021-06-06 00:21:04,640 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-06 00:21:04,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:21:04,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-06 00:21:04,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=975, Unknown=0, NotChecked=0, Total=1056 [2021-06-06 00:21:04,641 INFO L87 Difference]: Start difference. First operand 1288 states and 2976 transitions. Second operand has 33 states, 33 states have (on average 1.878787878787879) internal successors, (62), 32 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:21:08,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:21:08,653 INFO L93 Difference]: Finished difference Result 1720 states and 3833 transitions. [2021-06-06 00:21:08,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-06-06 00:21:08,653 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.878787878787879) internal successors, (62), 32 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-06 00:21:08,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:21:08,655 INFO L225 Difference]: With dead ends: 1720 [2021-06-06 00:21:08,655 INFO L226 Difference]: Without dead ends: 1654 [2021-06-06 00:21:08,655 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2654 ImplicationChecksByTransitivity, 3827.8ms TimeCoverageRelationStatistics Valid=647, Invalid=8665, Unknown=0, NotChecked=0, Total=9312 [2021-06-06 00:21:08,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1654 states. [2021-06-06 00:21:08,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1654 to 1395. [2021-06-06 00:21:08,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1395 states, 1394 states have (on average 2.317790530846485) internal successors, (3231), 1394 states have internal predecessors, (3231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:21:08,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1395 states to 1395 states and 3231 transitions. [2021-06-06 00:21:08,668 INFO L78 Accepts]: Start accepts. Automaton has 1395 states and 3231 transitions. Word has length 33 [2021-06-06 00:21:08,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:21:08,668 INFO L482 AbstractCegarLoop]: Abstraction has 1395 states and 3231 transitions. [2021-06-06 00:21:08,668 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.878787878787879) internal successors, (62), 32 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:21:08,668 INFO L276 IsEmpty]: Start isEmpty. Operand 1395 states and 3231 transitions. [2021-06-06 00:21:08,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-06 00:21:08,669 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:21:08,669 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:21:08,869 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable586 [2021-06-06 00:21:08,870 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:21:08,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:21:08,870 INFO L82 PathProgramCache]: Analyzing trace with hash -1325798457, now seen corresponding path program 52 times [2021-06-06 00:21:08,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:21:08,870 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748298897] [2021-06-06 00:21:08,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:21:08,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:21:09,154 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:21:09,154 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:21:09,154 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748298897] [2021-06-06 00:21:09,154 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748298897] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:21:09,154 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2103583332] [2021-06-06 00:21:09,154 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:21:09,184 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:21:09,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:21:09,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-06 00:21:09,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:21:09,796 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 2 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:21:09,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2103583332] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:21:09,797 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:21:09,797 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-06 00:21:09,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376137023] [2021-06-06 00:21:09,797 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-06 00:21:09,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:21:09,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-06 00:21:09,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=973, Unknown=0, NotChecked=0, Total=1056 [2021-06-06 00:21:09,798 INFO L87 Difference]: Start difference. First operand 1395 states and 3231 transitions. Second operand has 33 states, 33 states have (on average 1.878787878787879) internal successors, (62), 32 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:21:15,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:21:15,517 INFO L93 Difference]: Finished difference Result 1758 states and 3924 transitions. [2021-06-06 00:21:15,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2021-06-06 00:21:15,517 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.878787878787879) internal successors, (62), 32 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-06 00:21:15,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:21:15,519 INFO L225 Difference]: With dead ends: 1758 [2021-06-06 00:21:15,519 INFO L226 Difference]: Without dead ends: 1734 [2021-06-06 00:21:15,519 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4515 ImplicationChecksByTransitivity, 5407.6ms TimeCoverageRelationStatistics Valid=947, Invalid=13095, Unknown=0, NotChecked=0, Total=14042 [2021-06-06 00:21:15,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1734 states. [2021-06-06 00:21:15,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1734 to 1409. [2021-06-06 00:21:15,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1409 states, 1408 states have (on average 2.321022727272727) internal successors, (3268), 1408 states have internal predecessors, (3268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:21:15,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1409 states to 1409 states and 3268 transitions. [2021-06-06 00:21:15,533 INFO L78 Accepts]: Start accepts. Automaton has 1409 states and 3268 transitions. Word has length 33 [2021-06-06 00:21:15,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:21:15,534 INFO L482 AbstractCegarLoop]: Abstraction has 1409 states and 3268 transitions. [2021-06-06 00:21:15,534 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.878787878787879) internal successors, (62), 32 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:21:15,534 INFO L276 IsEmpty]: Start isEmpty. Operand 1409 states and 3268 transitions. [2021-06-06 00:21:15,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-06 00:21:15,536 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:21:15,536 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:21:15,758 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable613 [2021-06-06 00:21:15,758 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:21:15,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:21:15,758 INFO L82 PathProgramCache]: Analyzing trace with hash -1454541045, now seen corresponding path program 53 times [2021-06-06 00:21:15,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:21:15,758 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165042707] [2021-06-06 00:21:15,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:21:15,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:21:16,002 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:21:16,002 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:21:16,002 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165042707] [2021-06-06 00:21:16,002 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165042707] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:21:16,002 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151988941] [2021-06-06 00:21:16,002 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:21:16,029 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-06 00:21:16,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:21:16,030 WARN L261 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-06 00:21:16,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:21:16,710 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:21:16,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1151988941] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:21:16,710 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:21:16,710 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-06-06 00:21:16,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085704842] [2021-06-06 00:21:16,710 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-06 00:21:16,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:21:16,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-06 00:21:16,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=941, Unknown=0, NotChecked=0, Total=1056 [2021-06-06 00:21:16,711 INFO L87 Difference]: Start difference. First operand 1409 states and 3268 transitions. Second operand has 33 states, 33 states have (on average 1.8484848484848484) internal successors, (61), 32 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:21:19,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:21:19,516 INFO L93 Difference]: Finished difference Result 2073 states and 4601 transitions. [2021-06-06 00:21:19,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-06-06 00:21:19,516 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.8484848484848484) internal successors, (61), 32 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-06 00:21:19,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:21:19,518 INFO L225 Difference]: With dead ends: 2073 [2021-06-06 00:21:19,519 INFO L226 Difference]: Without dead ends: 2070 [2021-06-06 00:21:19,519 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2117 ImplicationChecksByTransitivity, 2818.5ms TimeCoverageRelationStatistics Valid=756, Invalid=6216, Unknown=0, NotChecked=0, Total=6972 [2021-06-06 00:21:19,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2070 states. [2021-06-06 00:21:19,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2070 to 1510. [2021-06-06 00:21:19,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1510 states, 1509 states have (on average 2.3459244532803183) internal successors, (3540), 1509 states have internal predecessors, (3540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:21:19,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1510 states to 1510 states and 3540 transitions. [2021-06-06 00:21:19,534 INFO L78 Accepts]: Start accepts. Automaton has 1510 states and 3540 transitions. Word has length 33 [2021-06-06 00:21:19,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:21:19,534 INFO L482 AbstractCegarLoop]: Abstraction has 1510 states and 3540 transitions. [2021-06-06 00:21:19,535 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.8484848484848484) internal successors, (61), 32 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:21:19,535 INFO L276 IsEmpty]: Start isEmpty. Operand 1510 states and 3540 transitions. [2021-06-06 00:21:19,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-06 00:21:19,536 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:21:19,536 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:21:19,736 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable641 [2021-06-06 00:21:19,737 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:21:19,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:21:19,737 INFO L82 PathProgramCache]: Analyzing trace with hash 121030207, now seen corresponding path program 54 times [2021-06-06 00:21:19,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:21:19,737 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207716754] [2021-06-06 00:21:19,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:21:19,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:21:20,100 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:21:20,100 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:21:20,100 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207716754] [2021-06-06 00:21:20,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207716754] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:21:20,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333630704] [2021-06-06 00:21:20,101 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-06 00:21:20,134 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-06 00:21:20,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:21:20,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-06 00:21:20,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:21:20,705 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:21:20,705 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [333630704] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:21:20,705 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:21:20,705 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 27 [2021-06-06 00:21:20,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035757278] [2021-06-06 00:21:20,706 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-06 00:21:20,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:21:20,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-06 00:21:20,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=658, Unknown=0, NotChecked=0, Total=756 [2021-06-06 00:21:20,706 INFO L87 Difference]: Start difference. First operand 1510 states and 3540 transitions. Second operand has 28 states, 28 states have (on average 2.107142857142857) internal successors, (59), 27 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:21:23,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:21:23,398 INFO L93 Difference]: Finished difference Result 2367 states and 5373 transitions. [2021-06-06 00:21:23,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-06 00:21:23,398 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.107142857142857) internal successors, (59), 27 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-06 00:21:23,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:21:23,400 INFO L225 Difference]: With dead ends: 2367 [2021-06-06 00:21:23,400 INFO L226 Difference]: Without dead ends: 2333 [2021-06-06 00:21:23,400 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1224 ImplicationChecksByTransitivity, 2700.9ms TimeCoverageRelationStatistics Valid=589, Invalid=3833, Unknown=0, NotChecked=0, Total=4422 [2021-06-06 00:21:23,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2333 states. [2021-06-06 00:21:23,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2333 to 1622. [2021-06-06 00:21:23,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1622 states, 1621 states have (on average 2.338679827267119) internal successors, (3791), 1621 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) [2021-06-06 00:21:23,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1622 states to 1622 states and 3791 transitions. [2021-06-06 00:21:23,417 INFO L78 Accepts]: Start accepts. Automaton has 1622 states and 3791 transitions. Word has length 33 [2021-06-06 00:21:23,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:21:23,417 INFO L482 AbstractCegarLoop]: Abstraction has 1622 states and 3791 transitions. [2021-06-06 00:21:23,417 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.107142857142857) internal successors, (59), 27 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:21:23,417 INFO L276 IsEmpty]: Start isEmpty. Operand 1622 states and 3791 transitions. [2021-06-06 00:21:23,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-06 00:21:23,419 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:21:23,419 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:21:23,619 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable652 [2021-06-06 00:21:23,619 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:21:23,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:21:23,620 INFO L82 PathProgramCache]: Analyzing trace with hash -167618429, now seen corresponding path program 55 times [2021-06-06 00:21:23,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:21:23,620 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179832905] [2021-06-06 00:21:23,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:21:23,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:21:23,908 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:21:23,908 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:21:23,908 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179832905] [2021-06-06 00:21:23,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179832905] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:21:23,908 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405786733] [2021-06-06 00:21:23,908 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:21:23,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:21:23,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-06 00:21:23,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:21:24,508 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:21:24,508 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1405786733] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:21:24,508 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:21:24,508 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 27 [2021-06-06 00:21:24,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154050050] [2021-06-06 00:21:24,509 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-06 00:21:24,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:21:24,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-06 00:21:24,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=664, Unknown=0, NotChecked=0, Total=756 [2021-06-06 00:21:24,509 INFO L87 Difference]: Start difference. First operand 1622 states and 3791 transitions. Second operand has 28 states, 28 states have (on average 2.107142857142857) internal successors, (59), 27 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:21:27,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:21:27,810 INFO L93 Difference]: Finished difference Result 2788 states and 6296 transitions. [2021-06-06 00:21:27,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-06 00:21:27,810 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.107142857142857) internal successors, (59), 27 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-06 00:21:27,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:21:27,813 INFO L225 Difference]: With dead ends: 2788 [2021-06-06 00:21:27,813 INFO L226 Difference]: Without dead ends: 2754 [2021-06-06 00:21:27,813 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1575 ImplicationChecksByTransitivity, 3080.0ms TimeCoverageRelationStatistics Valid=761, Invalid=4939, Unknown=0, NotChecked=0, Total=5700 [2021-06-06 00:21:27,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2754 states. [2021-06-06 00:21:27,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2754 to 1754. [2021-06-06 00:21:27,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1754 states, 1753 states have (on average 2.3462635482030803) internal successors, (4113), 1753 states have internal predecessors, (4113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:21:27,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1754 states to 1754 states and 4113 transitions. [2021-06-06 00:21:27,833 INFO L78 Accepts]: Start accepts. Automaton has 1754 states and 4113 transitions. Word has length 33 [2021-06-06 00:21:27,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:21:27,833 INFO L482 AbstractCegarLoop]: Abstraction has 1754 states and 4113 transitions. [2021-06-06 00:21:27,833 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.107142857142857) internal successors, (59), 27 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:21:27,833 INFO L276 IsEmpty]: Start isEmpty. Operand 1754 states and 4113 transitions. [2021-06-06 00:21:27,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-06 00:21:27,835 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:21:27,835 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:21:28,035 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable671,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:21:28,036 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:21:28,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:21:28,036 INFO L82 PathProgramCache]: Analyzing trace with hash 534308859, now seen corresponding path program 56 times [2021-06-06 00:21:28,036 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:21:28,036 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325765862] [2021-06-06 00:21:28,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:21:28,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:21:28,321 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:21:28,322 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:21:28,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325765862] [2021-06-06 00:21:28,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325765862] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:21:28,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [479636932] [2021-06-06 00:21:28,322 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:21:28,347 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:21:28,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:21:28,348 WARN L261 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-06 00:21:28,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:21:29,056 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:21:29,056 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [479636932] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:21:29,056 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:21:29,056 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-06-06 00:21:29,057 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776777578] [2021-06-06 00:21:29,057 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-06 00:21:29,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:21:29,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-06 00:21:29,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=959, Unknown=0, NotChecked=0, Total=1056 [2021-06-06 00:21:29,057 INFO L87 Difference]: Start difference. First operand 1754 states and 4113 transitions. Second operand has 33 states, 33 states have (on average 1.8484848484848484) internal successors, (61), 32 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:21:31,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:21:31,115 INFO L93 Difference]: Finished difference Result 2147 states and 4872 transitions. [2021-06-06 00:21:31,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-06 00:21:31,115 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.8484848484848484) internal successors, (61), 32 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-06 00:21:31,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:21:31,117 INFO L225 Difference]: With dead ends: 2147 [2021-06-06 00:21:31,117 INFO L226 Difference]: Without dead ends: 2126 [2021-06-06 00:21:31,118 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1086 ImplicationChecksByTransitivity, 1985.2ms TimeCoverageRelationStatistics Valid=340, Invalid=4082, Unknown=0, NotChecked=0, Total=4422 [2021-06-06 00:21:31,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2126 states. [2021-06-06 00:21:31,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2126 to 1806. [2021-06-06 00:21:31,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1806 states, 1805 states have (on average 2.3473684210526318) internal successors, (4237), 1805 states have internal predecessors, (4237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:21:31,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1806 states to 1806 states and 4237 transitions. [2021-06-06 00:21:31,134 INFO L78 Accepts]: Start accepts. Automaton has 1806 states and 4237 transitions. Word has length 33 [2021-06-06 00:21:31,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:21:31,134 INFO L482 AbstractCegarLoop]: Abstraction has 1806 states and 4237 transitions. [2021-06-06 00:21:31,134 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.8484848484848484) internal successors, (61), 32 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:21:31,134 INFO L276 IsEmpty]: Start isEmpty. Operand 1806 states and 4237 transitions. [2021-06-06 00:21:31,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-06 00:21:31,136 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:21:31,136 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:21:31,337 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable692,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:21:31,337 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:21:31,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:21:31,338 INFO L82 PathProgramCache]: Analyzing trace with hash 1630351679, now seen corresponding path program 57 times [2021-06-06 00:21:31,338 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:21:31,338 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147427217] [2021-06-06 00:21:31,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:21:31,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:21:31,625 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:21:31,625 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:21:31,625 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147427217] [2021-06-06 00:21:31,625 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147427217] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:21:31,625 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999634908] [2021-06-06 00:21:31,625 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:21:31,659 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-06 00:21:31,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:21:31,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-06 00:21:31,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:21:32,383 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 2 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:21:32,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1999634908] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:21:32,384 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:21:32,384 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-06 00:21:32,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489129210] [2021-06-06 00:21:32,384 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-06 00:21:32,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:21:32,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-06 00:21:32,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=938, Unknown=0, NotChecked=0, Total=1056 [2021-06-06 00:21:32,385 INFO L87 Difference]: Start difference. First operand 1806 states and 4237 transitions. Second operand has 33 states, 33 states have (on average 1.878787878787879) internal successors, (62), 32 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:21:34,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:21:34,952 INFO L93 Difference]: Finished difference Result 2353 states and 5326 transitions. [2021-06-06 00:21:34,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-06 00:21:34,953 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.878787878787879) internal successors, (62), 32 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-06 00:21:34,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:21:34,955 INFO L225 Difference]: With dead ends: 2353 [2021-06-06 00:21:34,955 INFO L226 Difference]: Without dead ends: 2311 [2021-06-06 00:21:34,955 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1812 ImplicationChecksByTransitivity, 2688.9ms TimeCoverageRelationStatistics Valid=799, Invalid=5521, Unknown=0, NotChecked=0, Total=6320 [2021-06-06 00:21:34,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2311 states. [2021-06-06 00:21:34,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2311 to 1865. [2021-06-06 00:21:34,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1865 states, 1864 states have (on average 2.342811158798283) internal successors, (4367), 1864 states have internal predecessors, (4367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:21:34,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1865 states to 1865 states and 4367 transitions. [2021-06-06 00:21:34,973 INFO L78 Accepts]: Start accepts. Automaton has 1865 states and 4367 transitions. Word has length 33 [2021-06-06 00:21:34,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:21:34,974 INFO L482 AbstractCegarLoop]: Abstraction has 1865 states and 4367 transitions. [2021-06-06 00:21:34,974 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.878787878787879) internal successors, (62), 32 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:21:34,974 INFO L276 IsEmpty]: Start isEmpty. Operand 1865 states and 4367 transitions. [2021-06-06 00:21:34,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-06 00:21:34,976 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:21:34,976 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:21:35,199 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable708,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:21:35,199 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:21:35,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:21:35,199 INFO L82 PathProgramCache]: Analyzing trace with hash -385362437, now seen corresponding path program 58 times [2021-06-06 00:21:35,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:21:35,200 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015721344] [2021-06-06 00:21:35,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:21:35,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:21:35,503 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:21:35,503 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:21:35,503 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015721344] [2021-06-06 00:21:35,503 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015721344] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:21:35,503 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [870182990] [2021-06-06 00:21:35,503 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:21:35,527 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:21:35,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:21:35,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-06 00:21:35,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:21:36,068 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:21:36,068 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [870182990] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:21:36,068 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:21:36,068 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 29 [2021-06-06 00:21:36,068 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112580632] [2021-06-06 00:21:36,068 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-06 00:21:36,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:21:36,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-06 00:21:36,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=756, Unknown=0, NotChecked=0, Total=870 [2021-06-06 00:21:36,069 INFO L87 Difference]: Start difference. First operand 1865 states and 4367 transitions. Second operand has 30 states, 30 states have (on average 2.033333333333333) internal successors, (61), 29 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:21:38,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:21:38,813 INFO L93 Difference]: Finished difference Result 3037 states and 6913 transitions. [2021-06-06 00:21:38,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-06 00:21:38,813 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.033333333333333) internal successors, (61), 29 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-06 00:21:38,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:21:38,816 INFO L225 Difference]: With dead ends: 3037 [2021-06-06 00:21:38,816 INFO L226 Difference]: Without dead ends: 2970 [2021-06-06 00:21:38,817 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1449 ImplicationChecksByTransitivity, 2748.8ms TimeCoverageRelationStatistics Valid=826, Invalid=4576, Unknown=0, NotChecked=0, Total=5402 [2021-06-06 00:21:38,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2970 states. [2021-06-06 00:21:38,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2970 to 1932. [2021-06-06 00:21:38,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1932 states, 1931 states have (on average 2.335059554634904) internal successors, (4509), 1931 states have internal predecessors, (4509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:21:38,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1932 states to 1932 states and 4509 transitions. [2021-06-06 00:21:38,840 INFO L78 Accepts]: Start accepts. Automaton has 1932 states and 4509 transitions. Word has length 33 [2021-06-06 00:21:38,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:21:38,840 INFO L482 AbstractCegarLoop]: Abstraction has 1932 states and 4509 transitions. [2021-06-06 00:21:38,840 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.033333333333333) internal successors, (61), 29 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:21:38,840 INFO L276 IsEmpty]: Start isEmpty. Operand 1932 states and 4509 transitions. [2021-06-06 00:21:38,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-06 00:21:38,842 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:21:38,842 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:21:39,042 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable730 [2021-06-06 00:21:39,042 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:21:39,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:21:39,043 INFO L82 PathProgramCache]: Analyzing trace with hash 237419395, now seen corresponding path program 59 times [2021-06-06 00:21:39,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:21:39,043 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343261173] [2021-06-06 00:21:39,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:21:39,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:21:39,232 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:21:39,233 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:21:39,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343261173] [2021-06-06 00:21:39,233 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343261173] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:21:39,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [827061785] [2021-06-06 00:21:39,233 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 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 [2021-06-06 00:21:39,261 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-06 00:21:39,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:21:39,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-06 00:21:39,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:21:39,812 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:21:39,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [827061785] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:21:39,813 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:21:39,813 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 28 [2021-06-06 00:21:39,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835500701] [2021-06-06 00:21:39,813 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-06 00:21:39,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:21:39,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-06 00:21:39,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=711, Unknown=0, NotChecked=0, Total=812 [2021-06-06 00:21:39,813 INFO L87 Difference]: Start difference. First operand 1932 states and 4509 transitions. Second operand has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:21:42,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:21:42,628 INFO L93 Difference]: Finished difference Result 3720 states and 8375 transitions. [2021-06-06 00:21:42,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-06 00:21:42,628 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-06 00:21:42,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:21:42,631 INFO L225 Difference]: With dead ends: 3720 [2021-06-06 00:21:42,631 INFO L226 Difference]: Without dead ends: 3639 [2021-06-06 00:21:42,632 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1483 ImplicationChecksByTransitivity, 2608.2ms TimeCoverageRelationStatistics Valid=944, Invalid=4908, Unknown=0, NotChecked=0, Total=5852 [2021-06-06 00:21:42,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3639 states. [2021-06-06 00:21:42,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3639 to 2060. [2021-06-06 00:21:42,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2060 states, 2059 states have (on average 2.329286061194755) internal successors, (4796), 2059 states have internal predecessors, (4796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:21:42,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2060 states to 2060 states and 4796 transitions. [2021-06-06 00:21:42,655 INFO L78 Accepts]: Start accepts. Automaton has 2060 states and 4796 transitions. Word has length 33 [2021-06-06 00:21:42,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:21:42,655 INFO L482 AbstractCegarLoop]: Abstraction has 2060 states and 4796 transitions. [2021-06-06 00:21:42,656 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:21:42,656 INFO L276 IsEmpty]: Start isEmpty. Operand 2060 states and 4796 transitions. [2021-06-06 00:21:42,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-06 00:21:42,658 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:21:42,658 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:21:42,858 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable748,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:21:42,858 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:21:42,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:21:42,859 INFO L82 PathProgramCache]: Analyzing trace with hash 174645243, now seen corresponding path program 60 times [2021-06-06 00:21:42,859 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:21:42,859 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542484694] [2021-06-06 00:21:42,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:21:42,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:21:43,115 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:21:43,115 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:21:43,115 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542484694] [2021-06-06 00:21:43,115 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542484694] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:21:43,115 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609120605] [2021-06-06 00:21:43,115 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:21:43,139 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-06 00:21:43,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:21:43,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-06 00:21:43,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:21:43,698 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:21:43,698 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [609120605] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:21:43,698 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:21:43,699 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 31 [2021-06-06 00:21:43,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786164485] [2021-06-06 00:21:43,699 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-06 00:21:43,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:21:43,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-06 00:21:43,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=903, Unknown=0, NotChecked=0, Total=992 [2021-06-06 00:21:43,699 INFO L87 Difference]: Start difference. First operand 2060 states and 4796 transitions. Second operand has 32 states, 32 states have (on average 1.9375) internal successors, (62), 31 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:21:46,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:21:46,879 INFO L93 Difference]: Finished difference Result 3836 states and 8664 transitions. [2021-06-06 00:21:46,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-06 00:21:46,879 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.9375) internal successors, (62), 31 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-06 00:21:46,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:21:46,882 INFO L225 Difference]: With dead ends: 3836 [2021-06-06 00:21:46,883 INFO L226 Difference]: Without dead ends: 3773 [2021-06-06 00:21:46,883 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2003 ImplicationChecksByTransitivity, 3048.3ms TimeCoverageRelationStatistics Valid=1036, Invalid=6620, Unknown=0, NotChecked=0, Total=7656 [2021-06-06 00:21:46,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3773 states. [2021-06-06 00:21:46,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3773 to 2341. [2021-06-06 00:21:46,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2341 states, 2340 states have (on average 2.345726495726496) internal successors, (5489), 2340 states have internal predecessors, (5489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:21:46,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2341 states to 2341 states and 5489 transitions. [2021-06-06 00:21:46,914 INFO L78 Accepts]: Start accepts. Automaton has 2341 states and 5489 transitions. Word has length 33 [2021-06-06 00:21:46,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:21:46,914 INFO L482 AbstractCegarLoop]: Abstraction has 2341 states and 5489 transitions. [2021-06-06 00:21:46,914 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.9375) internal successors, (62), 31 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:21:46,914 INFO L276 IsEmpty]: Start isEmpty. Operand 2341 states and 5489 transitions. [2021-06-06 00:21:46,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-06 00:21:46,916 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:21:46,916 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:21:47,117 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable765 [2021-06-06 00:21:47,117 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:21:47,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:21:47,117 INFO L82 PathProgramCache]: Analyzing trace with hash 42093407, now seen corresponding path program 61 times [2021-06-06 00:21:47,118 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:21:47,118 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124601083] [2021-06-06 00:21:47,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:21:47,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:21:47,357 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:21:47,357 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:21:47,357 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124601083] [2021-06-06 00:21:47,357 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124601083] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:21:47,357 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1507906430] [2021-06-06 00:21:47,357 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:21:47,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:21:47,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-06 00:21:47,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:21:48,065 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:21:48,065 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1507906430] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:21:48,065 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:21:48,065 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 32 [2021-06-06 00:21:48,065 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373431768] [2021-06-06 00:21:48,066 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-06 00:21:48,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:21:48,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-06 00:21:48,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=912, Unknown=0, NotChecked=0, Total=1056 [2021-06-06 00:21:48,066 INFO L87 Difference]: Start difference. First operand 2341 states and 5489 transitions. Second operand has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:21:49,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:21:49,681 INFO L93 Difference]: Finished difference Result 3299 states and 7593 transitions. [2021-06-06 00:21:49,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-06 00:21:49,681 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-06 00:21:49,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:21:49,684 INFO L225 Difference]: With dead ends: 3299 [2021-06-06 00:21:49,684 INFO L226 Difference]: Without dead ends: 3247 [2021-06-06 00:21:49,685 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1402 ImplicationChecksByTransitivity, 1718.9ms TimeCoverageRelationStatistics Valid=669, Invalid=4023, Unknown=0, NotChecked=0, Total=4692 [2021-06-06 00:21:49,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3247 states. [2021-06-06 00:21:49,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3247 to 2377. [2021-06-06 00:21:49,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2377 states, 2376 states have (on average 2.3434343434343434) internal successors, (5568), 2376 states have internal predecessors, (5568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:21:49,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2377 states to 2377 states and 5568 transitions. [2021-06-06 00:21:49,711 INFO L78 Accepts]: Start accepts. Automaton has 2377 states and 5568 transitions. Word has length 35 [2021-06-06 00:21:49,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:21:49,711 INFO L482 AbstractCegarLoop]: Abstraction has 2377 states and 5568 transitions. [2021-06-06 00:21:49,711 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:21:49,712 INFO L276 IsEmpty]: Start isEmpty. Operand 2377 states and 5568 transitions. [2021-06-06 00:21:49,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-06 00:21:49,714 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:21:49,714 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:21:49,914 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable783 [2021-06-06 00:21:49,914 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:21:49,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:21:49,915 INFO L82 PathProgramCache]: Analyzing trace with hash 1208064305, now seen corresponding path program 62 times [2021-06-06 00:21:49,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:21:49,915 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498033834] [2021-06-06 00:21:49,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:21:49,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:21:50,145 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:21:50,146 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:21:50,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498033834] [2021-06-06 00:21:50,146 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498033834] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:21:50,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1772872091] [2021-06-06 00:21:50,146 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:21:50,170 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:21:50,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:21:50,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-06 00:21:50,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:21:50,714 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:21:50,714 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1772872091] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:21:50,714 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:21:50,714 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 32 [2021-06-06 00:21:50,714 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810484219] [2021-06-06 00:21:50,714 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-06 00:21:50,714 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:21:50,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-06 00:21:50,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=921, Unknown=0, NotChecked=0, Total=1056 [2021-06-06 00:21:50,715 INFO L87 Difference]: Start difference. First operand 2377 states and 5568 transitions. Second operand has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:21:52,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:21:52,274 INFO L93 Difference]: Finished difference Result 3241 states and 7484 transitions. [2021-06-06 00:21:52,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-06 00:21:52,274 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-06 00:21:52,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:21:52,277 INFO L225 Difference]: With dead ends: 3241 [2021-06-06 00:21:52,277 INFO L226 Difference]: Without dead ends: 3193 [2021-06-06 00:21:52,278 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1247 ImplicationChecksByTransitivity, 1537.9ms TimeCoverageRelationStatistics Valid=571, Invalid=3589, Unknown=0, NotChecked=0, Total=4160 [2021-06-06 00:21:52,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3193 states. [2021-06-06 00:21:52,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3193 to 2387. [2021-06-06 00:21:52,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2387 states, 2386 states have (on average 2.341994970662196) internal successors, (5588), 2386 states have internal predecessors, (5588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:21:52,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2387 states to 2387 states and 5588 transitions. [2021-06-06 00:21:52,302 INFO L78 Accepts]: Start accepts. Automaton has 2387 states and 5588 transitions. Word has length 35 [2021-06-06 00:21:52,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:21:52,302 INFO L482 AbstractCegarLoop]: Abstraction has 2387 states and 5588 transitions. [2021-06-06 00:21:52,302 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:21:52,302 INFO L276 IsEmpty]: Start isEmpty. Operand 2387 states and 5588 transitions. [2021-06-06 00:21:52,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-06 00:21:52,305 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:21:52,305 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:21:52,505 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable802,63 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:21:52,505 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:21:52,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:21:52,505 INFO L82 PathProgramCache]: Analyzing trace with hash 1268866609, now seen corresponding path program 63 times [2021-06-06 00:21:52,506 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:21:52,506 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765352993] [2021-06-06 00:21:52,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:21:52,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:21:52,711 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:21:52,711 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:21:52,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765352993] [2021-06-06 00:21:52,711 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765352993] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:21:52,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1744775372] [2021-06-06 00:21:52,711 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:21:52,741 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-06 00:21:52,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:21:52,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-06 00:21:52,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:21:53,296 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:21:53,296 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1744775372] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:21:53,296 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:21:53,296 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 32 [2021-06-06 00:21:53,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411936623] [2021-06-06 00:21:53,297 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-06 00:21:53,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:21:53,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-06 00:21:53,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=931, Unknown=0, NotChecked=0, Total=1056 [2021-06-06 00:21:53,297 INFO L87 Difference]: Start difference. First operand 2387 states and 5588 transitions. Second operand has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:21:55,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:21:55,381 INFO L93 Difference]: Finished difference Result 3451 states and 7906 transitions. [2021-06-06 00:21:55,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-06 00:21:55,381 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-06 00:21:55,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:21:55,384 INFO L225 Difference]: With dead ends: 3451 [2021-06-06 00:21:55,384 INFO L226 Difference]: Without dead ends: 3409 [2021-06-06 00:21:55,385 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1794 ImplicationChecksByTransitivity, 2111.2ms TimeCoverageRelationStatistics Valid=923, Invalid=5083, Unknown=0, NotChecked=0, Total=6006 [2021-06-06 00:21:55,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3409 states. [2021-06-06 00:21:55,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3409 to 2419. [2021-06-06 00:21:55,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2419 states, 2418 states have (on average 2.339950372208437) internal successors, (5658), 2418 states have internal predecessors, (5658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:21:55,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2419 states to 2419 states and 5658 transitions. [2021-06-06 00:21:55,430 INFO L78 Accepts]: Start accepts. Automaton has 2419 states and 5658 transitions. Word has length 35 [2021-06-06 00:21:55,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:21:55,430 INFO L482 AbstractCegarLoop]: Abstraction has 2419 states and 5658 transitions. [2021-06-06 00:21:55,430 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:21:55,430 INFO L276 IsEmpty]: Start isEmpty. Operand 2419 states and 5658 transitions. [2021-06-06 00:21:55,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-06 00:21:55,434 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:21:55,434 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:21:55,653 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable822,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:21:55,653 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:21:55,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:21:55,654 INFO L82 PathProgramCache]: Analyzing trace with hash 2098249707, now seen corresponding path program 64 times [2021-06-06 00:21:55,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:21:55,654 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936120696] [2021-06-06 00:21:55,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:21:55,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:21:55,895 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:21:55,896 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:21:55,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936120696] [2021-06-06 00:21:55,896 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1936120696] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:21:55,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [11639921] [2021-06-06 00:21:55,896 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:21:55,920 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:21:55,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:21:55,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-06 00:21:55,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:21:56,522 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:21:56,523 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [11639921] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:21:56,523 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:21:56,523 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 32 [2021-06-06 00:21:56,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580459852] [2021-06-06 00:21:56,523 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-06 00:21:56,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:21:56,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-06 00:21:56,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=930, Unknown=0, NotChecked=0, Total=1056 [2021-06-06 00:21:56,524 INFO L87 Difference]: Start difference. First operand 2419 states and 5658 transitions. Second operand has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:21:58,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:21:58,375 INFO L93 Difference]: Finished difference Result 3327 states and 7665 transitions. [2021-06-06 00:21:58,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-06 00:21:58,376 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-06 00:21:58,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:21:58,378 INFO L225 Difference]: With dead ends: 3327 [2021-06-06 00:21:58,378 INFO L226 Difference]: Without dead ends: 3273 [2021-06-06 00:21:58,379 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1394 ImplicationChecksByTransitivity, 1966.2ms TimeCoverageRelationStatistics Valid=674, Invalid=4156, Unknown=0, NotChecked=0, Total=4830 [2021-06-06 00:21:58,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3273 states. [2021-06-06 00:21:58,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3273 to 2423. [2021-06-06 00:21:58,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2423 states, 2422 states have (on average 2.3393889347646573) internal successors, (5666), 2422 states have internal predecessors, (5666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:21:58,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2423 states to 2423 states and 5666 transitions. [2021-06-06 00:21:58,405 INFO L78 Accepts]: Start accepts. Automaton has 2423 states and 5666 transitions. Word has length 35 [2021-06-06 00:21:58,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:21:58,405 INFO L482 AbstractCegarLoop]: Abstraction has 2423 states and 5666 transitions. [2021-06-06 00:21:58,405 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:21:58,405 INFO L276 IsEmpty]: Start isEmpty. Operand 2423 states and 5666 transitions. [2021-06-06 00:21:58,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-06 00:21:58,408 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:21:58,408 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:21:58,614 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable840 [2021-06-06 00:21:58,615 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:21:58,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:21:58,615 INFO L82 PathProgramCache]: Analyzing trace with hash -2135915285, now seen corresponding path program 65 times [2021-06-06 00:21:58,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:21:58,615 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694490853] [2021-06-06 00:21:58,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:21:58,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:21:58,901 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:21:58,901 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:21:58,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694490853] [2021-06-06 00:21:58,901 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694490853] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:21:58,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1347521390] [2021-06-06 00:21:58,901 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:21:58,933 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-06 00:21:58,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:21:58,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-06 00:21:58,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:21:59,621 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:21:59,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1347521390] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:21:59,627 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:21:59,627 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 32 [2021-06-06 00:21:59,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989225621] [2021-06-06 00:21:59,627 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-06 00:21:59,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:21:59,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-06 00:21:59,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=937, Unknown=0, NotChecked=0, Total=1056 [2021-06-06 00:21:59,628 INFO L87 Difference]: Start difference. First operand 2423 states and 5666 transitions. Second operand has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:22:02,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:22:02,055 INFO L93 Difference]: Finished difference Result 3537 states and 8101 transitions. [2021-06-06 00:22:02,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-06 00:22:02,055 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-06 00:22:02,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:22:02,058 INFO L225 Difference]: With dead ends: 3537 [2021-06-06 00:22:02,058 INFO L226 Difference]: Without dead ends: 3495 [2021-06-06 00:22:02,059 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1962 ImplicationChecksByTransitivity, 2586.5ms TimeCoverageRelationStatistics Valid=1079, Invalid=5563, Unknown=0, NotChecked=0, Total=6642 [2021-06-06 00:22:02,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3495 states. [2021-06-06 00:22:02,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3495 to 2421. [2021-06-06 00:22:02,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2421 states, 2420 states have (on average 2.3396694214876033) internal successors, (5662), 2420 states have internal predecessors, (5662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:22:02,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2421 states to 2421 states and 5662 transitions. [2021-06-06 00:22:02,082 INFO L78 Accepts]: Start accepts. Automaton has 2421 states and 5662 transitions. Word has length 35 [2021-06-06 00:22:02,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:22:02,082 INFO L482 AbstractCegarLoop]: Abstraction has 2421 states and 5662 transitions. [2021-06-06 00:22:02,082 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:22:02,082 INFO L276 IsEmpty]: Start isEmpty. Operand 2421 states and 5662 transitions. [2021-06-06 00:22:02,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-06 00:22:02,084 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:22:02,084 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:22:02,284 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable858 [2021-06-06 00:22:02,284 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:22:02,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:22:02,285 INFO L82 PathProgramCache]: Analyzing trace with hash -354380241, now seen corresponding path program 66 times [2021-06-06 00:22:02,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:22:02,285 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412419140] [2021-06-06 00:22:02,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:22:02,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:22:02,493 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:22:02,494 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:22:02,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412419140] [2021-06-06 00:22:02,494 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412419140] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:22:02,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491914573] [2021-06-06 00:22:02,494 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-06 00:22:02,519 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-06 00:22:02,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:22:02,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-06 00:22:02,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:22:03,094 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:22:03,094 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1491914573] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:22:03,094 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:22:03,094 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 32 [2021-06-06 00:22:03,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446724723] [2021-06-06 00:22:03,094 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-06 00:22:03,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:22:03,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-06 00:22:03,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=935, Unknown=0, NotChecked=0, Total=1056 [2021-06-06 00:22:03,095 INFO L87 Difference]: Start difference. First operand 2421 states and 5662 transitions. Second operand has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:22:06,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:22:06,353 INFO L93 Difference]: Finished difference Result 3760 states and 8574 transitions. [2021-06-06 00:22:06,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-06-06 00:22:06,353 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-06 00:22:06,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:22:06,357 INFO L225 Difference]: With dead ends: 3760 [2021-06-06 00:22:06,357 INFO L226 Difference]: Without dead ends: 3718 [2021-06-06 00:22:06,358 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3241 ImplicationChecksByTransitivity, 3078.6ms TimeCoverageRelationStatistics Valid=1483, Invalid=8219, Unknown=0, NotChecked=0, Total=9702 [2021-06-06 00:22:06,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3718 states. [2021-06-06 00:22:06,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3718 to 2453. [2021-06-06 00:22:06,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2453 states, 2452 states have (on average 2.33931484502447) internal successors, (5736), 2452 states have internal predecessors, (5736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:22:06,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2453 states to 2453 states and 5736 transitions. [2021-06-06 00:22:06,413 INFO L78 Accepts]: Start accepts. Automaton has 2453 states and 5736 transitions. Word has length 35 [2021-06-06 00:22:06,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:22:06,413 INFO L482 AbstractCegarLoop]: Abstraction has 2453 states and 5736 transitions. [2021-06-06 00:22:06,413 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:22:06,413 INFO L276 IsEmpty]: Start isEmpty. Operand 2453 states and 5736 transitions. [2021-06-06 00:22:06,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-06 00:22:06,416 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:22:06,416 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:22:06,624 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable879,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:22:06,625 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:22:06,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:22:06,625 INFO L82 PathProgramCache]: Analyzing trace with hash -643028877, now seen corresponding path program 67 times [2021-06-06 00:22:06,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:22:06,625 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569348856] [2021-06-06 00:22:06,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:22:06,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:22:06,846 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:22:06,846 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:22:06,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569348856] [2021-06-06 00:22:06,846 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569348856] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:22:06,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671795907] [2021-06-06 00:22:06,846 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-06 00:22:06,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:22:06,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-06 00:22:06,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:22:07,482 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:22:07,483 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1671795907] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:22:07,483 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:22:07,483 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 32 [2021-06-06 00:22:07,483 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923212558] [2021-06-06 00:22:07,483 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-06 00:22:07,483 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:22:07,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-06 00:22:07,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=932, Unknown=0, NotChecked=0, Total=1056 [2021-06-06 00:22:07,484 INFO L87 Difference]: Start difference. First operand 2453 states and 5736 transitions. Second operand has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:22:11,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:22:11,370 INFO L93 Difference]: Finished difference Result 4092 states and 9200 transitions. [2021-06-06 00:22:11,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-06-06 00:22:11,371 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-06 00:22:11,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:22:11,375 INFO L225 Difference]: With dead ends: 4092 [2021-06-06 00:22:11,375 INFO L226 Difference]: Without dead ends: 4052 [2021-06-06 00:22:11,376 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4119 ImplicationChecksByTransitivity, 3646.0ms TimeCoverageRelationStatistics Valid=1844, Invalid=10146, Unknown=0, NotChecked=0, Total=11990 [2021-06-06 00:22:11,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4052 states. [2021-06-06 00:22:11,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4052 to 2489. [2021-06-06 00:22:11,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2489 states, 2488 states have (on average 2.3392282958199355) internal successors, (5820), 2488 states have internal predecessors, (5820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:22:11,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2489 states to 2489 states and 5820 transitions. [2021-06-06 00:22:11,410 INFO L78 Accepts]: Start accepts. Automaton has 2489 states and 5820 transitions. Word has length 35 [2021-06-06 00:22:11,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:22:11,410 INFO L482 AbstractCegarLoop]: Abstraction has 2489 states and 5820 transitions. [2021-06-06 00:22:11,410 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:22:11,410 INFO L276 IsEmpty]: Start isEmpty. Operand 2489 states and 5820 transitions. [2021-06-06 00:22:11,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-06 00:22:11,413 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:22:11,413 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:22:11,617 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable898,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:22:11,617 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:22:11,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:22:11,618 INFO L82 PathProgramCache]: Analyzing trace with hash 268401591, now seen corresponding path program 68 times [2021-06-06 00:22:11,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:22:11,618 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055652567] [2021-06-06 00:22:11,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:22:11,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:22:11,821 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:22:11,821 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:22:11,821 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055652567] [2021-06-06 00:22:11,821 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055652567] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:22:11,822 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [643068043] [2021-06-06 00:22:11,822 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-06 00:22:11,847 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:22:11,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:22:11,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-06 00:22:11,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:22:12,413 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:22:12,413 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [643068043] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:22:12,413 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:22:12,413 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 32 [2021-06-06 00:22:12,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7106579] [2021-06-06 00:22:12,414 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-06 00:22:12,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:22:12,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-06 00:22:12,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=930, Unknown=0, NotChecked=0, Total=1056 [2021-06-06 00:22:12,414 INFO L87 Difference]: Start difference. First operand 2489 states and 5820 transitions. Second operand has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:22:16,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:22:16,406 INFO L93 Difference]: Finished difference Result 4809 states and 10645 transitions. [2021-06-06 00:22:16,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-06-06 00:22:16,406 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-06 00:22:16,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:22:16,410 INFO L225 Difference]: With dead ends: 4809 [2021-06-06 00:22:16,410 INFO L226 Difference]: Without dead ends: 4769 [2021-06-06 00:22:16,411 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3487 ImplicationChecksByTransitivity, 3438.0ms TimeCoverageRelationStatistics Valid=1613, Invalid=9099, Unknown=0, NotChecked=0, Total=10712 [2021-06-06 00:22:16,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4769 states. [2021-06-06 00:22:16,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4769 to 2561. [2021-06-06 00:22:16,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2561 states, 2560 states have (on average 2.346875) internal successors, (6008), 2560 states have internal predecessors, (6008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:22:16,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2561 states to 2561 states and 6008 transitions. [2021-06-06 00:22:16,439 INFO L78 Accepts]: Start accepts. Automaton has 2561 states and 6008 transitions. Word has length 35 [2021-06-06 00:22:16,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:22:16,439 INFO L482 AbstractCegarLoop]: Abstraction has 2561 states and 6008 transitions. [2021-06-06 00:22:16,440 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:22:16,440 INFO L276 IsEmpty]: Start isEmpty. Operand 2561 states and 6008 transitions. [2021-06-06 00:22:16,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-06 00:22:16,441 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:22:16,441 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:22:16,642 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable922,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:22:16,642 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:22:16,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:22:16,642 INFO L82 PathProgramCache]: Analyzing trace with hash -461964319, now seen corresponding path program 69 times [2021-06-06 00:22:16,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:22:16,642 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146340461] [2021-06-06 00:22:16,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:22:16,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:22:16,801 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 9 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:22:16,801 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:22:16,801 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146340461] [2021-06-06 00:22:16,802 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [146340461] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:22:16,802 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960523153] [2021-06-06 00:22:16,802 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:22:16,828 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-06-06 00:22:16,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:22:16,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-06 00:22:16,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:22:17,240 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 12 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:22:17,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [960523153] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:22:17,241 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:22:17,241 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2021-06-06 00:22:17,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688688991] [2021-06-06 00:22:17,241 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-06 00:22:17,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:22:17,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-06 00:22:17,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=684, Unknown=0, NotChecked=0, Total=812 [2021-06-06 00:22:17,241 INFO L87 Difference]: Start difference. First operand 2561 states and 6008 transitions. Second operand has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:22:18,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:22:18,790 INFO L93 Difference]: Finished difference Result 3689 states and 8571 transitions. [2021-06-06 00:22:18,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-06 00:22:18,790 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-06 00:22:18,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:22:18,793 INFO L225 Difference]: With dead ends: 3689 [2021-06-06 00:22:18,794 INFO L226 Difference]: Without dead ends: 3687 [2021-06-06 00:22:18,794 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 883 ImplicationChecksByTransitivity, 1374.9ms TimeCoverageRelationStatistics Valid=607, Invalid=3299, Unknown=0, NotChecked=0, Total=3906 [2021-06-06 00:22:18,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3687 states. [2021-06-06 00:22:18,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3687 to 2760. [2021-06-06 00:22:18,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2760 states, 2759 states have (on average 2.3599130119608556) internal successors, (6511), 2759 states have internal predecessors, (6511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:22:18,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2760 states to 2760 states and 6511 transitions. [2021-06-06 00:22:18,825 INFO L78 Accepts]: Start accepts. Automaton has 2760 states and 6511 transitions. Word has length 35 [2021-06-06 00:22:18,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:22:18,825 INFO L482 AbstractCegarLoop]: Abstraction has 2760 states and 6511 transitions. [2021-06-06 00:22:18,825 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:22:18,826 INFO L276 IsEmpty]: Start isEmpty. Operand 2760 states and 6511 transitions. [2021-06-06 00:22:18,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-06 00:22:18,828 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:22:18,828 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:22:19,028 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable940,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:22:19,029 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:22:19,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:22:19,029 INFO L82 PathProgramCache]: Analyzing trace with hash 2016394933, now seen corresponding path program 70 times [2021-06-06 00:22:19,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:22:19,029 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516468323] [2021-06-06 00:22:19,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:22:19,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:22:19,299 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:22:19,300 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:22:19,300 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516468323] [2021-06-06 00:22:19,300 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516468323] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:22:19,300 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1913131738] [2021-06-06 00:22:19,300 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:22:19,323 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:22:19,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:22:19,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-06 00:22:19,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:22:19,920 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:22:19,920 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1913131738] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:22:19,920 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:22:19,920 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 32 [2021-06-06 00:22:19,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315260620] [2021-06-06 00:22:19,920 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-06 00:22:19,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:22:19,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-06 00:22:19,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=932, Unknown=0, NotChecked=0, Total=1056 [2021-06-06 00:22:19,921 INFO L87 Difference]: Start difference. First operand 2760 states and 6511 transitions. Second operand has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:22:23,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:22:23,489 INFO L93 Difference]: Finished difference Result 3976 states and 9161 transitions. [2021-06-06 00:22:23,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-06-06 00:22:23,490 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-06 00:22:23,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:22:23,493 INFO L225 Difference]: With dead ends: 3976 [2021-06-06 00:22:23,493 INFO L226 Difference]: Without dead ends: 3916 [2021-06-06 00:22:23,493 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3668 ImplicationChecksByTransitivity, 3379.2ms TimeCoverageRelationStatistics Valid=1313, Invalid=9193, Unknown=0, NotChecked=0, Total=10506 [2021-06-06 00:22:23,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3916 states. [2021-06-06 00:22:23,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3916 to 2774. [2021-06-06 00:22:23,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2774 states, 2773 states have (on average 2.3609808871258564) internal successors, (6547), 2773 states have internal predecessors, (6547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:22:23,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2774 states to 2774 states and 6547 transitions. [2021-06-06 00:22:23,520 INFO L78 Accepts]: Start accepts. Automaton has 2774 states and 6547 transitions. Word has length 35 [2021-06-06 00:22:23,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:22:23,520 INFO L482 AbstractCegarLoop]: Abstraction has 2774 states and 6547 transitions. [2021-06-06 00:22:23,521 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:22:23,521 INFO L276 IsEmpty]: Start isEmpty. Operand 2774 states and 6547 transitions. [2021-06-06 00:22:23,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-06 00:22:23,523 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:22:23,523 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:22:23,723 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable956 [2021-06-06 00:22:23,723 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:22:23,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:22:23,724 INFO L82 PathProgramCache]: Analyzing trace with hash 2077197237, now seen corresponding path program 71 times [2021-06-06 00:22:23,724 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:22:23,724 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456098526] [2021-06-06 00:22:23,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:22:23,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:22:24,008 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:22:24,008 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:22:24,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456098526] [2021-06-06 00:22:24,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [456098526] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:22:24,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [975261012] [2021-06-06 00:22:24,008 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:22:24,037 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-06 00:22:24,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:22:24,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-06 00:22:24,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:22:24,640 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:22:24,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [975261012] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:22:24,641 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:22:24,641 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 32 [2021-06-06 00:22:24,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193136853] [2021-06-06 00:22:24,641 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-06 00:22:24,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:22:24,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-06 00:22:24,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=939, Unknown=0, NotChecked=0, Total=1056 [2021-06-06 00:22:24,641 INFO L87 Difference]: Start difference. First operand 2774 states and 6547 transitions. Second operand has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:22:28,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:22:28,030 INFO L93 Difference]: Finished difference Result 4131 states and 9524 transitions. [2021-06-06 00:22:28,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-06-06 00:22:28,031 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-06 00:22:28,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:22:28,035 INFO L225 Difference]: With dead ends: 4131 [2021-06-06 00:22:28,035 INFO L226 Difference]: Without dead ends: 4089 [2021-06-06 00:22:28,035 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3041 ImplicationChecksByTransitivity, 3256.2ms TimeCoverageRelationStatistics Valid=1423, Invalid=7889, Unknown=0, NotChecked=0, Total=9312 [2021-06-06 00:22:28,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4089 states. [2021-06-06 00:22:28,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4089 to 2805. [2021-06-06 00:22:28,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2805 states, 2804 states have (on average 2.361626248216833) internal successors, (6622), 2804 states have internal predecessors, (6622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:22:28,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2805 states to 2805 states and 6622 transitions. [2021-06-06 00:22:28,063 INFO L78 Accepts]: Start accepts. Automaton has 2805 states and 6622 transitions. Word has length 35 [2021-06-06 00:22:28,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:22:28,064 INFO L482 AbstractCegarLoop]: Abstraction has 2805 states and 6622 transitions. [2021-06-06 00:22:28,064 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:22:28,064 INFO L276 IsEmpty]: Start isEmpty. Operand 2805 states and 6622 transitions. [2021-06-06 00:22:28,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-06 00:22:28,066 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:22:28,066 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:22:28,266 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable977,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:22:28,266 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:22:28,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:22:28,267 INFO L82 PathProgramCache]: Analyzing trace with hash -1617056775, now seen corresponding path program 72 times [2021-06-06 00:22:28,267 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:22:28,267 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53595635] [2021-06-06 00:22:28,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:22:28,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:22:28,452 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:22:28,452 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:22:28,452 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53595635] [2021-06-06 00:22:28,452 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [53595635] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:22:28,452 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647869830] [2021-06-06 00:22:28,452 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:22:28,478 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-06 00:22:28,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:22:28,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-06 00:22:28,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:22:28,903 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:22:28,904 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [647869830] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:22:28,904 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:22:28,904 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2021-06-06 00:22:28,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662171999] [2021-06-06 00:22:28,904 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-06 00:22:28,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:22:28,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-06 00:22:28,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=706, Unknown=0, NotChecked=0, Total=812 [2021-06-06 00:22:28,904 INFO L87 Difference]: Start difference. First operand 2805 states and 6622 transitions. Second operand has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:22:30,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:22:30,690 INFO L93 Difference]: Finished difference Result 3500 states and 8075 transitions. [2021-06-06 00:22:30,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-06 00:22:30,690 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-06 00:22:30,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:22:30,693 INFO L225 Difference]: With dead ends: 3500 [2021-06-06 00:22:30,693 INFO L226 Difference]: Without dead ends: 3500 [2021-06-06 00:22:30,693 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1286 ImplicationChecksByTransitivity, 1735.2ms TimeCoverageRelationStatistics Valid=849, Invalid=3981, Unknown=0, NotChecked=0, Total=4830 [2021-06-06 00:22:30,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3500 states. [2021-06-06 00:22:30,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3500 to 2817. [2021-06-06 00:22:30,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2817 states, 2816 states have (on average 2.3597301136363638) internal successors, (6645), 2816 states have internal predecessors, (6645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:22:30,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2817 states to 2817 states and 6645 transitions. [2021-06-06 00:22:30,723 INFO L78 Accepts]: Start accepts. Automaton has 2817 states and 6645 transitions. Word has length 35 [2021-06-06 00:22:30,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:22:30,723 INFO L482 AbstractCegarLoop]: Abstraction has 2817 states and 6645 transitions. [2021-06-06 00:22:30,723 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:22:30,723 INFO L276 IsEmpty]: Start isEmpty. Operand 2817 states and 6645 transitions. [2021-06-06 00:22:30,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-06 00:22:30,725 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:22:30,725 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:22:30,928 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable998 [2021-06-06 00:22:30,929 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:22:30,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:22:30,929 INFO L82 PathProgramCache]: Analyzing trace with hash -1905705411, now seen corresponding path program 73 times [2021-06-06 00:22:30,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:22:30,929 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102205279] [2021-06-06 00:22:30,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:22:30,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:22:31,110 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:22:31,111 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:22:31,111 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102205279] [2021-06-06 00:22:31,111 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102205279] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:22:31,111 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1677805477] [2021-06-06 00:22:31,111 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:22:31,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:22:31,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-06 00:22:31,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:22:31,604 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:22:31,605 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1677805477] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:22:31,605 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:22:31,605 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2021-06-06 00:22:31,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138428329] [2021-06-06 00:22:31,605 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-06 00:22:31,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:22:31,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-06 00:22:31,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=705, Unknown=0, NotChecked=0, Total=812 [2021-06-06 00:22:31,605 INFO L87 Difference]: Start difference. First operand 2817 states and 6645 transitions. Second operand has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:22:33,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:22:33,586 INFO L93 Difference]: Finished difference Result 3661 states and 8422 transitions. [2021-06-06 00:22:33,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-06 00:22:33,587 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-06 00:22:33,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:22:33,590 INFO L225 Difference]: With dead ends: 3661 [2021-06-06 00:22:33,590 INFO L226 Difference]: Without dead ends: 3661 [2021-06-06 00:22:33,591 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1445 ImplicationChecksByTransitivity, 1924.7ms TimeCoverageRelationStatistics Valid=939, Invalid=4463, Unknown=0, NotChecked=0, Total=5402 [2021-06-06 00:22:33,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3661 states. [2021-06-06 00:22:33,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3661 to 2821. [2021-06-06 00:22:33,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2821 states, 2820 states have (on average 2.3613475177304966) internal successors, (6659), 2820 states have internal predecessors, (6659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:22:33,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2821 states to 2821 states and 6659 transitions. [2021-06-06 00:22:33,619 INFO L78 Accepts]: Start accepts. Automaton has 2821 states and 6659 transitions. Word has length 35 [2021-06-06 00:22:33,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:22:33,619 INFO L482 AbstractCegarLoop]: Abstraction has 2821 states and 6659 transitions. [2021-06-06 00:22:33,619 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:22:33,619 INFO L276 IsEmpty]: Start isEmpty. Operand 2821 states and 6659 transitions. [2021-06-06 00:22:33,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-06 00:22:33,621 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:22:33,621 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:22:33,821 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1014,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:22:33,822 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:22:33,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:22:33,822 INFO L82 PathProgramCache]: Analyzing trace with hash -994274943, now seen corresponding path program 74 times [2021-06-06 00:22:33,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:22:33,822 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071473936] [2021-06-06 00:22:33,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:22:33,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:22:34,037 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:22:34,037 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:22:34,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071473936] [2021-06-06 00:22:34,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071473936] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:22:34,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1434446331] [2021-06-06 00:22:34,037 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:22:34,061 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:22:34,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:22:34,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-06 00:22:34,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:22:34,477 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:22:34,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1434446331] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:22:34,478 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:22:34,478 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2021-06-06 00:22:34,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534336086] [2021-06-06 00:22:34,478 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-06 00:22:34,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:22:34,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-06 00:22:34,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=700, Unknown=0, NotChecked=0, Total=812 [2021-06-06 00:22:34,478 INFO L87 Difference]: Start difference. First operand 2821 states and 6659 transitions. Second operand has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:22:36,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:22:36,309 INFO L93 Difference]: Finished difference Result 4400 states and 10185 transitions. [2021-06-06 00:22:36,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-06 00:22:36,310 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-06 00:22:36,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:22:36,313 INFO L225 Difference]: With dead ends: 4400 [2021-06-06 00:22:36,314 INFO L226 Difference]: Without dead ends: 4400 [2021-06-06 00:22:36,314 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1319 ImplicationChecksByTransitivity, 1824.1ms TimeCoverageRelationStatistics Valid=887, Invalid=4225, Unknown=0, NotChecked=0, Total=5112 [2021-06-06 00:22:36,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4400 states. [2021-06-06 00:22:36,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4400 to 2832. [2021-06-06 00:22:36,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2832 states, 2831 states have (on average 2.362062875309078) internal successors, (6687), 2831 states have internal predecessors, (6687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:22:36,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2832 states to 2832 states and 6687 transitions. [2021-06-06 00:22:36,344 INFO L78 Accepts]: Start accepts. Automaton has 2832 states and 6687 transitions. Word has length 35 [2021-06-06 00:22:36,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:22:36,344 INFO L482 AbstractCegarLoop]: Abstraction has 2832 states and 6687 transitions. [2021-06-06 00:22:36,345 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:22:36,345 INFO L276 IsEmpty]: Start isEmpty. Operand 2832 states and 6687 transitions. [2021-06-06 00:22:36,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-06 00:22:36,359 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:22:36,359 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:22:36,559 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1033 [2021-06-06 00:22:36,559 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:22:36,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:22:36,560 INFO L82 PathProgramCache]: Analyzing trace with hash -22956363, now seen corresponding path program 75 times [2021-06-06 00:22:36,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:22:36,560 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640490015] [2021-06-06 00:22:36,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:22:36,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:22:36,828 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:22:36,828 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:22:36,828 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640490015] [2021-06-06 00:22:36,828 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640490015] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:22:36,828 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1797030323] [2021-06-06 00:22:36,828 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:22:36,862 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-06 00:22:36,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:22:36,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-06 00:22:36,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:22:37,444 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:22:37,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1797030323] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:22:37,445 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:22:37,445 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 31 [2021-06-06 00:22:37,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565087569] [2021-06-06 00:22:37,445 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-06 00:22:37,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:22:37,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-06 00:22:37,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=872, Unknown=0, NotChecked=0, Total=992 [2021-06-06 00:22:37,445 INFO L87 Difference]: Start difference. First operand 2832 states and 6687 transitions. Second operand has 32 states, 32 states have (on average 2.03125) internal successors, (65), 31 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:22:40,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:22:40,590 INFO L93 Difference]: Finished difference Result 4002 states and 9232 transitions. [2021-06-06 00:22:40,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-06-06 00:22:40,591 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.03125) internal successors, (65), 31 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-06 00:22:40,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:22:40,605 INFO L225 Difference]: With dead ends: 4002 [2021-06-06 00:22:40,605 INFO L226 Difference]: Without dead ends: 3948 [2021-06-06 00:22:40,605 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2853 ImplicationChecksByTransitivity, 2999.6ms TimeCoverageRelationStatistics Valid=1083, Invalid=7473, Unknown=0, NotChecked=0, Total=8556 [2021-06-06 00:22:40,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3948 states. [2021-06-06 00:22:40,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3948 to 2856. [2021-06-06 00:22:40,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2856 states, 2855 states have (on average 2.360420315236427) internal successors, (6739), 2855 states have internal predecessors, (6739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:22:40,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2856 states to 2856 states and 6739 transitions. [2021-06-06 00:22:40,633 INFO L78 Accepts]: Start accepts. Automaton has 2856 states and 6739 transitions. Word has length 35 [2021-06-06 00:22:40,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:22:40,633 INFO L482 AbstractCegarLoop]: Abstraction has 2856 states and 6739 transitions. [2021-06-06 00:22:40,633 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.03125) internal successors, (65), 31 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:22:40,633 INFO L276 IsEmpty]: Start isEmpty. Operand 2856 states and 6739 transitions. [2021-06-06 00:22:40,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-06 00:22:40,635 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:22:40,635 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:22:40,836 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1052,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:22:40,836 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:22:40,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:22:40,836 INFO L82 PathProgramCache]: Analyzing trace with hash -44282443, now seen corresponding path program 76 times [2021-06-06 00:22:40,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:22:40,837 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942442467] [2021-06-06 00:22:40,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:22:40,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:22:41,075 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:22:41,075 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:22:41,075 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942442467] [2021-06-06 00:22:41,075 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942442467] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:22:41,075 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870922462] [2021-06-06 00:22:41,075 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-06 00:22:41,099 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:22:41,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:22:41,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-06 00:22:41,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:22:41,645 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:22:41,645 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1870922462] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:22:41,645 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:22:41,645 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 31 [2021-06-06 00:22:41,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423923570] [2021-06-06 00:22:41,645 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-06 00:22:41,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:22:41,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-06 00:22:41,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=872, Unknown=0, NotChecked=0, Total=992 [2021-06-06 00:22:41,646 INFO L87 Difference]: Start difference. First operand 2856 states and 6739 transitions. Second operand has 32 states, 32 states have (on average 2.03125) internal successors, (65), 31 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:22:44,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:22:44,290 INFO L93 Difference]: Finished difference Result 3842 states and 8918 transitions. [2021-06-06 00:22:44,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-06 00:22:44,290 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.03125) internal successors, (65), 31 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-06 00:22:44,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:22:44,294 INFO L225 Difference]: With dead ends: 3842 [2021-06-06 00:22:44,294 INFO L226 Difference]: Without dead ends: 3770 [2021-06-06 00:22:44,295 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1845 ImplicationChecksByTransitivity, 2621.9ms TimeCoverageRelationStatistics Valid=887, Invalid=5119, Unknown=0, NotChecked=0, Total=6006 [2021-06-06 00:22:44,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3770 states. [2021-06-06 00:22:44,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3770 to 2860. [2021-06-06 00:22:44,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2860 states, 2859 states have (on average 2.3585169639734174) internal successors, (6743), 2859 states have internal predecessors, (6743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:22:44,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2860 states to 2860 states and 6743 transitions. [2021-06-06 00:22:44,327 INFO L78 Accepts]: Start accepts. Automaton has 2860 states and 6743 transitions. Word has length 35 [2021-06-06 00:22:44,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:22:44,327 INFO L482 AbstractCegarLoop]: Abstraction has 2860 states and 6743 transitions. [2021-06-06 00:22:44,327 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.03125) internal successors, (65), 31 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:22:44,327 INFO L276 IsEmpty]: Start isEmpty. Operand 2860 states and 6743 transitions. [2021-06-06 00:22:44,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-06 00:22:44,330 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:22:44,330 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:22:44,530 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1071,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:22:44,530 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:22:44,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:22:44,531 INFO L82 PathProgramCache]: Analyzing trace with hash 1833180341, now seen corresponding path program 77 times [2021-06-06 00:22:44,531 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:22:44,531 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841963447] [2021-06-06 00:22:44,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:22:44,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:22:44,700 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:22:44,700 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:22:44,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841963447] [2021-06-06 00:22:44,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841963447] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:22:44,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [991753894] [2021-06-06 00:22:44,700 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:22:44,725 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-06 00:22:44,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:22:44,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-06 00:22:44,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:22:45,127 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:22:45,127 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [991753894] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:22:45,127 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:22:45,128 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2021-06-06 00:22:45,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664877058] [2021-06-06 00:22:45,128 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-06 00:22:45,128 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:22:45,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-06 00:22:45,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=702, Unknown=0, NotChecked=0, Total=812 [2021-06-06 00:22:45,128 INFO L87 Difference]: Start difference. First operand 2860 states and 6743 transitions. Second operand has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:22:46,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:22:46,906 INFO L93 Difference]: Finished difference Result 5084 states and 11781 transitions. [2021-06-06 00:22:46,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-06 00:22:46,906 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-06 00:22:46,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:22:46,911 INFO L225 Difference]: With dead ends: 5084 [2021-06-06 00:22:46,911 INFO L226 Difference]: Without dead ends: 5084 [2021-06-06 00:22:46,912 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1111 ImplicationChecksByTransitivity, 1666.2ms TimeCoverageRelationStatistics Valid=771, Invalid=3651, Unknown=0, NotChecked=0, Total=4422 [2021-06-06 00:22:46,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5084 states. [2021-06-06 00:22:46,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5084 to 3004. [2021-06-06 00:22:46,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3004 states, 3003 states have (on average 2.3533133533133532) internal successors, (7067), 3003 states have internal predecessors, (7067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:22:46,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3004 states to 3004 states and 7067 transitions. [2021-06-06 00:22:46,949 INFO L78 Accepts]: Start accepts. Automaton has 3004 states and 7067 transitions. Word has length 35 [2021-06-06 00:22:46,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:22:46,949 INFO L482 AbstractCegarLoop]: Abstraction has 3004 states and 7067 transitions. [2021-06-06 00:22:46,949 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:22:46,949 INFO L276 IsEmpty]: Start isEmpty. Operand 3004 states and 7067 transitions. [2021-06-06 00:22:46,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-06 00:22:46,963 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:22:46,964 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:22:47,164 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1093 [2021-06-06 00:22:47,164 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:22:47,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:22:47,164 INFO L82 PathProgramCache]: Analyzing trace with hash 846119997, now seen corresponding path program 78 times [2021-06-06 00:22:47,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:22:47,165 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492188695] [2021-06-06 00:22:47,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:22:47,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:22:47,312 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-06 00:22:47,312 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:22:47,312 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492188695] [2021-06-06 00:22:47,312 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492188695] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:22:47,313 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080979223] [2021-06-06 00:22:47,313 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:22:47,338 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-06 00:22:47,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:22:47,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-06 00:22:47,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:22:47,513 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 2 proven. 47 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:22:47,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1080979223] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:22:47,513 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:22:47,513 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 26 [2021-06-06 00:22:47,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588129801] [2021-06-06 00:22:47,513 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-06 00:22:47,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:22:47,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-06 00:22:47,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=552, Unknown=0, NotChecked=0, Total=650 [2021-06-06 00:22:47,514 INFO L87 Difference]: Start difference. First operand 3004 states and 7067 transitions. Second operand has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 26 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:22:48,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:22:48,568 INFO L93 Difference]: Finished difference Result 4189 states and 9617 transitions. [2021-06-06 00:22:48,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-06 00:22:48,569 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 26 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-06 00:22:48,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:22:48,573 INFO L225 Difference]: With dead ends: 4189 [2021-06-06 00:22:48,573 INFO L226 Difference]: Without dead ends: 4153 [2021-06-06 00:22:48,574 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 690 ImplicationChecksByTransitivity, 902.0ms TimeCoverageRelationStatistics Valid=521, Invalid=2341, Unknown=0, NotChecked=0, Total=2862 [2021-06-06 00:22:48,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4153 states. [2021-06-06 00:22:48,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4153 to 2873. [2021-06-06 00:22:48,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2873 states, 2872 states have (on average 2.3467966573816157) internal successors, (6740), 2872 states have internal predecessors, (6740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:22:48,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2873 states to 2873 states and 6740 transitions. [2021-06-06 00:22:48,615 INFO L78 Accepts]: Start accepts. Automaton has 2873 states and 6740 transitions. Word has length 35 [2021-06-06 00:22:48,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:22:48,615 INFO L482 AbstractCegarLoop]: Abstraction has 2873 states and 6740 transitions. [2021-06-06 00:22:48,615 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 26 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:22:48,615 INFO L276 IsEmpty]: Start isEmpty. Operand 2873 states and 6740 transitions. [2021-06-06 00:22:48,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-06 00:22:48,619 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:22:48,619 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:22:48,831 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1110 [2021-06-06 00:22:48,831 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:22:48,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:22:48,831 INFO L82 PathProgramCache]: Analyzing trace with hash -1809722061, now seen corresponding path program 79 times [2021-06-06 00:22:48,831 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:22:48,831 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230208388] [2021-06-06 00:22:48,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:22:48,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:22:49,066 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:22:49,066 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:22:49,067 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230208388] [2021-06-06 00:22:49,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230208388] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:22:49,067 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1648234427] [2021-06-06 00:22:49,067 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:22:49,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:22:49,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-06 00:22:49,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:22:49,702 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:22:49,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1648234427] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:22:49,702 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:22:49,702 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 31 [2021-06-06 00:22:49,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331939255] [2021-06-06 00:22:49,703 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-06 00:22:49,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:22:49,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-06 00:22:49,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=875, Unknown=0, NotChecked=0, Total=992 [2021-06-06 00:22:49,703 INFO L87 Difference]: Start difference. First operand 2873 states and 6740 transitions. Second operand has 32 states, 32 states have (on average 2.03125) internal successors, (65), 31 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:22:53,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:22:53,254 INFO L93 Difference]: Finished difference Result 4270 states and 9783 transitions. [2021-06-06 00:22:53,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-06-06 00:22:53,254 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.03125) internal successors, (65), 31 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-06 00:22:53,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:22:53,258 INFO L225 Difference]: With dead ends: 4270 [2021-06-06 00:22:53,258 INFO L226 Difference]: Without dead ends: 4222 [2021-06-06 00:22:53,259 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3551 ImplicationChecksByTransitivity, 3521.3ms TimeCoverageRelationStatistics Valid=1575, Invalid=8727, Unknown=0, NotChecked=0, Total=10302 [2021-06-06 00:22:53,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4222 states. [2021-06-06 00:22:53,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4222 to 2879. [2021-06-06 00:22:53,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2879 states, 2878 states have (on average 2.3467685892981236) internal successors, (6754), 2878 states have internal predecessors, (6754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:22:53,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2879 states to 2879 states and 6754 transitions. [2021-06-06 00:22:53,287 INFO L78 Accepts]: Start accepts. Automaton has 2879 states and 6754 transitions. Word has length 35 [2021-06-06 00:22:53,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:22:53,287 INFO L482 AbstractCegarLoop]: Abstraction has 2879 states and 6754 transitions. [2021-06-06 00:22:53,287 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.03125) internal successors, (65), 31 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:22:53,287 INFO L276 IsEmpty]: Start isEmpty. Operand 2879 states and 6754 transitions. [2021-06-06 00:22:53,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-06 00:22:53,290 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:22:53,290 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:22:53,506 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1116,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:22:53,506 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:22:53,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:22:53,506 INFO L82 PathProgramCache]: Analyzing trace with hash -1249714381, now seen corresponding path program 80 times [2021-06-06 00:22:53,506 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:22:53,506 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731567299] [2021-06-06 00:22:53,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:22:53,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:22:53,713 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:22:53,713 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:22:53,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731567299] [2021-06-06 00:22:53,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731567299] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:22:53,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [584950073] [2021-06-06 00:22:53,713 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:22:53,751 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:22:53,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:22:53,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-06 00:22:53,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:22:54,301 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:22:54,302 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [584950073] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:22:54,302 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:22:54,302 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 31 [2021-06-06 00:22:54,302 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716979839] [2021-06-06 00:22:54,302 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-06 00:22:54,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:22:54,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-06 00:22:54,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=872, Unknown=0, NotChecked=0, Total=992 [2021-06-06 00:22:54,303 INFO L87 Difference]: Start difference. First operand 2879 states and 6754 transitions. Second operand has 32 states, 32 states have (on average 2.03125) internal successors, (65), 31 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:22:57,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:22:57,170 INFO L93 Difference]: Finished difference Result 5077 states and 11546 transitions. [2021-06-06 00:22:57,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-06 00:22:57,170 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.03125) internal successors, (65), 31 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-06 00:22:57,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:22:57,175 INFO L225 Difference]: With dead ends: 5077 [2021-06-06 00:22:57,176 INFO L226 Difference]: Without dead ends: 4993 [2021-06-06 00:22:57,176 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2361 ImplicationChecksByTransitivity, 2827.7ms TimeCoverageRelationStatistics Valid=1052, Invalid=6258, Unknown=0, NotChecked=0, Total=7310 [2021-06-06 00:22:57,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4993 states. [2021-06-06 00:22:57,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4993 to 3061. [2021-06-06 00:22:57,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3061 states, 3060 states have (on average 2.3532679738562092) internal successors, (7201), 3060 states have internal predecessors, (7201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:22:57,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3061 states to 3061 states and 7201 transitions. [2021-06-06 00:22:57,220 INFO L78 Accepts]: Start accepts. Automaton has 3061 states and 7201 transitions. Word has length 35 [2021-06-06 00:22:57,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:22:57,220 INFO L482 AbstractCegarLoop]: Abstraction has 3061 states and 7201 transitions. [2021-06-06 00:22:57,220 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.03125) internal successors, (65), 31 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:22:57,221 INFO L276 IsEmpty]: Start isEmpty. Operand 3061 states and 7201 transitions. [2021-06-06 00:22:57,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-06 00:22:57,225 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:22:57,225 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:22:57,426 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1136 [2021-06-06 00:22:57,426 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:22:57,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:22:57,427 INFO L82 PathProgramCache]: Analyzing trace with hash -366524553, now seen corresponding path program 81 times [2021-06-06 00:22:57,427 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:22:57,427 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711371221] [2021-06-06 00:22:57,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:22:57,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:22:57,642 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:22:57,642 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:22:57,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711371221] [2021-06-06 00:22:57,642 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711371221] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:22:57,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1357094305] [2021-06-06 00:22:57,642 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:22:57,669 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-06-06 00:22:57,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:22:57,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-06 00:22:57,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:22:58,277 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:22:58,277 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1357094305] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:22:58,277 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:22:58,277 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 31 [2021-06-06 00:22:58,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514298128] [2021-06-06 00:22:58,277 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-06 00:22:58,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:22:58,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-06 00:22:58,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=872, Unknown=0, NotChecked=0, Total=992 [2021-06-06 00:22:58,278 INFO L87 Difference]: Start difference. First operand 3061 states and 7201 transitions. Second operand has 32 states, 32 states have (on average 2.03125) internal successors, (65), 31 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:23:01,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:23:01,781 INFO L93 Difference]: Finished difference Result 5205 states and 11840 transitions. [2021-06-06 00:23:01,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-06 00:23:01,781 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.03125) internal successors, (65), 31 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-06 00:23:01,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:23:01,786 INFO L225 Difference]: With dead ends: 5205 [2021-06-06 00:23:01,786 INFO L226 Difference]: Without dead ends: 5157 [2021-06-06 00:23:01,786 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2893 ImplicationChecksByTransitivity, 3297.2ms TimeCoverageRelationStatistics Valid=1325, Invalid=7417, Unknown=0, NotChecked=0, Total=8742 [2021-06-06 00:23:01,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5157 states. [2021-06-06 00:23:01,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5157 to 3104. [2021-06-06 00:23:01,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3104 states, 3103 states have (on average 2.350306155333548) internal successors, (7293), 3103 states have internal predecessors, (7293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:23:01,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3104 states to 3104 states and 7293 transitions. [2021-06-06 00:23:01,828 INFO L78 Accepts]: Start accepts. Automaton has 3104 states and 7293 transitions. Word has length 35 [2021-06-06 00:23:01,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:23:01,828 INFO L482 AbstractCegarLoop]: Abstraction has 3104 states and 7293 transitions. [2021-06-06 00:23:01,829 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.03125) internal successors, (65), 31 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:23:01,829 INFO L276 IsEmpty]: Start isEmpty. Operand 3104 states and 7293 transitions. [2021-06-06 00:23:01,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-06 00:23:01,832 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:23:01,832 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:23:02,054 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1154 [2021-06-06 00:23:02,054 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:23:02,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:23:02,055 INFO L82 PathProgramCache]: Analyzing trace with hash 1433047865, now seen corresponding path program 82 times [2021-06-06 00:23:02,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:23:02,055 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6833431] [2021-06-06 00:23:02,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:23:02,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:23:02,341 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:23:02,342 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:23:02,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6833431] [2021-06-06 00:23:02,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6833431] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:23:02,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1443818487] [2021-06-06 00:23:02,342 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:23:02,365 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:23:02,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:23:02,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-06 00:23:02,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:23:02,978 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:23:02,979 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1443818487] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:23:02,979 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:23:02,979 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 32 [2021-06-06 00:23:02,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608646190] [2021-06-06 00:23:02,979 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-06 00:23:02,979 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:23:02,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-06 00:23:02,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=934, Unknown=0, NotChecked=0, Total=1056 [2021-06-06 00:23:02,979 INFO L87 Difference]: Start difference. First operand 3104 states and 7293 transitions. Second operand has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:23:07,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:23:07,703 INFO L93 Difference]: Finished difference Result 4625 states and 10559 transitions. [2021-06-06 00:23:07,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2021-06-06 00:23:07,704 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-06 00:23:07,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:23:07,708 INFO L225 Difference]: With dead ends: 4625 [2021-06-06 00:23:07,708 INFO L226 Difference]: Without dead ends: 4559 [2021-06-06 00:23:07,709 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5744 ImplicationChecksByTransitivity, 4484.2ms TimeCoverageRelationStatistics Valid=2007, Invalid=13493, Unknown=0, NotChecked=0, Total=15500 [2021-06-06 00:23:07,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4559 states. [2021-06-06 00:23:07,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4559 to 3124. [2021-06-06 00:23:07,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3124 states, 3123 states have (on average 2.3519052193403778) internal successors, (7345), 3123 states have internal predecessors, (7345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:23:07,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3124 states to 3124 states and 7345 transitions. [2021-06-06 00:23:07,741 INFO L78 Accepts]: Start accepts. Automaton has 3124 states and 7345 transitions. Word has length 35 [2021-06-06 00:23:07,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:23:07,741 INFO L482 AbstractCegarLoop]: Abstraction has 3124 states and 7345 transitions. [2021-06-06 00:23:07,741 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:23:07,741 INFO L276 IsEmpty]: Start isEmpty. Operand 3124 states and 7345 transitions. [2021-06-06 00:23:07,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-06 00:23:07,744 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:23:07,744 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:23:07,944 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1174,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:23:07,944 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:23:07,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:23:07,945 INFO L82 PathProgramCache]: Analyzing trace with hash -1902771911, now seen corresponding path program 83 times [2021-06-06 00:23:07,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:23:07,945 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093261770] [2021-06-06 00:23:07,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:23:07,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:23:08,250 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:23:08,250 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:23:08,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093261770] [2021-06-06 00:23:08,250 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2093261770] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:23:08,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1580242245] [2021-06-06 00:23:08,250 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-06 00:23:08,275 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-06 00:23:08,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:23:08,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-06 00:23:08,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:23:08,856 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:23:08,856 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1580242245] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:23:08,856 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:23:08,856 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 32 [2021-06-06 00:23:08,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551296850] [2021-06-06 00:23:08,856 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-06 00:23:08,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:23:08,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-06 00:23:08,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=937, Unknown=0, NotChecked=0, Total=1056 [2021-06-06 00:23:08,857 INFO L87 Difference]: Start difference. First operand 3124 states and 7345 transitions. Second operand has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:23:12,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:23:12,743 INFO L93 Difference]: Finished difference Result 4367 states and 10055 transitions. [2021-06-06 00:23:12,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-06-06 00:23:12,744 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-06 00:23:12,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:23:12,748 INFO L225 Difference]: With dead ends: 4367 [2021-06-06 00:23:12,748 INFO L226 Difference]: Without dead ends: 4331 [2021-06-06 00:23:12,748 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3566 ImplicationChecksByTransitivity, 3808.5ms TimeCoverageRelationStatistics Valid=1380, Invalid=9126, Unknown=0, NotChecked=0, Total=10506 [2021-06-06 00:23:12,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4331 states. [2021-06-06 00:23:12,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4331 to 3128. [2021-06-06 00:23:12,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3128 states, 3127 states have (on average 2.351455068755996) internal successors, (7353), 3127 states have internal predecessors, (7353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:23:12,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3128 states to 3128 states and 7353 transitions. [2021-06-06 00:23:12,780 INFO L78 Accepts]: Start accepts. Automaton has 3128 states and 7353 transitions. Word has length 35 [2021-06-06 00:23:12,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:23:12,780 INFO L482 AbstractCegarLoop]: Abstraction has 3128 states and 7353 transitions. [2021-06-06 00:23:12,780 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:23:12,780 INFO L276 IsEmpty]: Start isEmpty. Operand 3128 states and 7353 transitions. [2021-06-06 00:23:12,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-06 00:23:12,783 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:23:12,783 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:23:12,983 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1195,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:23:12,983 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:23:12,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:23:12,983 INFO L82 PathProgramCache]: Analyzing trace with hash 1493850169, now seen corresponding path program 84 times [2021-06-06 00:23:12,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:23:12,984 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902765047] [2021-06-06 00:23:12,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:23:12,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:23:13,260 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:23:13,260 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:23:13,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902765047] [2021-06-06 00:23:13,260 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902765047] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:23:13,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [560670078] [2021-06-06 00:23:13,260 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 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 [2021-06-06 00:23:13,286 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-06 00:23:13,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:23:13,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-06 00:23:13,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:23:13,920 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:23:13,920 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [560670078] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:23:13,920 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:23:13,920 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 32 [2021-06-06 00:23:13,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094901106] [2021-06-06 00:23:13,921 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-06 00:23:13,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:23:13,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-06 00:23:13,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=941, Unknown=0, NotChecked=0, Total=1056 [2021-06-06 00:23:13,921 INFO L87 Difference]: Start difference. First operand 3128 states and 7353 transitions. Second operand has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:23:19,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:23:19,259 INFO L93 Difference]: Finished difference Result 4790 states and 10902 transitions. [2021-06-06 00:23:19,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2021-06-06 00:23:19,260 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-06 00:23:19,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:23:19,264 INFO L225 Difference]: With dead ends: 4790 [2021-06-06 00:23:19,264 INFO L226 Difference]: Without dead ends: 4748 [2021-06-06 00:23:19,265 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6035 ImplicationChecksByTransitivity, 5138.2ms TimeCoverageRelationStatistics Valid=2422, Invalid=14090, Unknown=0, NotChecked=0, Total=16512 [2021-06-06 00:23:19,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4748 states. [2021-06-06 00:23:19,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4748 to 3140. [2021-06-06 00:23:19,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3140 states, 3139 states have (on average 2.352341510035043) internal successors, (7384), 3139 states have internal predecessors, (7384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:23:19,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3140 states to 3140 states and 7384 transitions. [2021-06-06 00:23:19,295 INFO L78 Accepts]: Start accepts. Automaton has 3140 states and 7384 transitions. Word has length 35 [2021-06-06 00:23:19,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:23:19,295 INFO L482 AbstractCegarLoop]: Abstraction has 3140 states and 7384 transitions. [2021-06-06 00:23:19,295 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:23:19,295 INFO L276 IsEmpty]: Start isEmpty. Operand 3140 states and 7384 transitions. [2021-06-06 00:23:19,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-06 00:23:19,298 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:23:19,298 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:23:19,498 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1217 [2021-06-06 00:23:19,499 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:23:19,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:23:19,499 INFO L82 PathProgramCache]: Analyzing trace with hash 2094563453, now seen corresponding path program 85 times [2021-06-06 00:23:19,499 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:23:19,499 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663364799] [2021-06-06 00:23:19,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:23:19,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:23:19,692 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 1 proven. 48 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:23:19,692 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:23:19,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663364799] [2021-06-06 00:23:19,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663364799] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:23:19,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1798878949] [2021-06-06 00:23:19,692 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 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 [2021-06-06 00:23:19,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:23:19,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-06 00:23:19,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:23:20,163 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:23:20,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1798878949] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:23:20,164 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:23:20,164 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2021-06-06 00:23:20,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974606125] [2021-06-06 00:23:20,164 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-06 00:23:20,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:23:20,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-06 00:23:20,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=705, Unknown=0, NotChecked=0, Total=812 [2021-06-06 00:23:20,165 INFO L87 Difference]: Start difference. First operand 3140 states and 7384 transitions. Second operand has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:23:22,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:23:22,257 INFO L93 Difference]: Finished difference Result 3894 states and 8946 transitions. [2021-06-06 00:23:22,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-06 00:23:22,258 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-06 00:23:22,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:23:22,261 INFO L225 Difference]: With dead ends: 3894 [2021-06-06 00:23:22,261 INFO L226 Difference]: Without dead ends: 3894 [2021-06-06 00:23:22,262 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1440 ImplicationChecksByTransitivity, 1944.2ms TimeCoverageRelationStatistics Valid=1006, Invalid=4396, Unknown=0, NotChecked=0, Total=5402 [2021-06-06 00:23:22,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3894 states. [2021-06-06 00:23:22,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3894 to 3148. [2021-06-06 00:23:22,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3148 states, 3147 states have (on average 2.3511280584683827) internal successors, (7399), 3147 states have internal predecessors, (7399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:23:22,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3148 states to 3148 states and 7399 transitions. [2021-06-06 00:23:22,294 INFO L78 Accepts]: Start accepts. Automaton has 3148 states and 7399 transitions. Word has length 35 [2021-06-06 00:23:22,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:23:22,294 INFO L482 AbstractCegarLoop]: Abstraction has 3148 states and 7399 transitions. [2021-06-06 00:23:22,294 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:23:22,294 INFO L276 IsEmpty]: Start isEmpty. Operand 3148 states and 7399 transitions. [2021-06-06 00:23:22,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-06 00:23:22,296 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:23:22,297 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:23:22,497 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1235 [2021-06-06 00:23:22,497 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:23:22,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:23:22,497 INFO L82 PathProgramCache]: Analyzing trace with hash -1577622011, now seen corresponding path program 86 times [2021-06-06 00:23:22,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:23:22,498 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606404980] [2021-06-06 00:23:22,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:23:22,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:23:22,694 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 1 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:23:22,694 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:23:22,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606404980] [2021-06-06 00:23:22,694 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606404980] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:23:22,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [852722775] [2021-06-06 00:23:22,695 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-06 00:23:22,724 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:23:22,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:23:22,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-06 00:23:22,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:23:23,142 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:23:23,142 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [852722775] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:23:23,142 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:23:23,142 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 27 [2021-06-06 00:23:23,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102590294] [2021-06-06 00:23:23,142 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-06 00:23:23,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:23:23,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-06 00:23:23,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=651, Unknown=0, NotChecked=0, Total=756 [2021-06-06 00:23:23,143 INFO L87 Difference]: Start difference. First operand 3148 states and 7399 transitions. Second operand has 28 states, 28 states have (on average 2.3214285714285716) internal successors, (65), 27 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:23:25,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:23:25,117 INFO L93 Difference]: Finished difference Result 4657 states and 10723 transitions. [2021-06-06 00:23:25,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-06 00:23:25,117 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.3214285714285716) internal successors, (65), 27 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-06 00:23:25,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:23:25,121 INFO L225 Difference]: With dead ends: 4657 [2021-06-06 00:23:25,121 INFO L226 Difference]: Without dead ends: 4654 [2021-06-06 00:23:25,121 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1328 ImplicationChecksByTransitivity, 1847.8ms TimeCoverageRelationStatistics Valid=896, Invalid=4216, Unknown=0, NotChecked=0, Total=5112 [2021-06-06 00:23:25,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4654 states. [2021-06-06 00:23:25,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4654 to 3187. [2021-06-06 00:23:25,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3187 states, 3186 states have (on average 2.349968612680477) internal successors, (7487), 3186 states have internal predecessors, (7487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:23:25,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3187 states to 3187 states and 7487 transitions. [2021-06-06 00:23:25,154 INFO L78 Accepts]: Start accepts. Automaton has 3187 states and 7487 transitions. Word has length 35 [2021-06-06 00:23:25,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:23:25,154 INFO L482 AbstractCegarLoop]: Abstraction has 3187 states and 7487 transitions. [2021-06-06 00:23:25,154 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.3214285714285716) internal successors, (65), 27 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:23:25,154 INFO L276 IsEmpty]: Start isEmpty. Operand 3187 states and 7487 transitions. [2021-06-06 00:23:25,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-06 00:23:25,156 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:23:25,157 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:23:25,359 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1257 [2021-06-06 00:23:25,359 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:23:25,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:23:25,359 INFO L82 PathProgramCache]: Analyzing trace with hash -2070250695, now seen corresponding path program 87 times [2021-06-06 00:23:25,359 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:23:25,359 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937766223] [2021-06-06 00:23:25,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:23:25,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:23:25,513 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:23:25,513 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:23:25,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937766223] [2021-06-06 00:23:25,514 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937766223] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:23:25,514 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1483012981] [2021-06-06 00:23:25,514 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 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 [2021-06-06 00:23:25,539 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-06 00:23:25,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:23:25,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-06 00:23:25,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:23:25,972 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:23:25,972 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1483012981] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:23:25,972 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:23:25,972 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2021-06-06 00:23:25,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327756429] [2021-06-06 00:23:25,973 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-06 00:23:25,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:23:25,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-06 00:23:25,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=690, Unknown=0, NotChecked=0, Total=812 [2021-06-06 00:23:25,973 INFO L87 Difference]: Start difference. First operand 3187 states and 7487 transitions. Second operand has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:23:27,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:23:27,606 INFO L93 Difference]: Finished difference Result 5710 states and 13179 transitions. [2021-06-06 00:23:27,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-06 00:23:27,607 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-06 00:23:27,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:23:27,613 INFO L225 Difference]: With dead ends: 5710 [2021-06-06 00:23:27,613 INFO L226 Difference]: Without dead ends: 5686 [2021-06-06 00:23:27,614 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1243 ImplicationChecksByTransitivity, 1494.1ms TimeCoverageRelationStatistics Valid=857, Invalid=3835, Unknown=0, NotChecked=0, Total=4692 [2021-06-06 00:23:27,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5686 states. [2021-06-06 00:23:27,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5686 to 4202. [2021-06-06 00:23:27,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4202 states, 4201 states have (on average 2.379909545346346) internal successors, (9998), 4201 states have internal predecessors, (9998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:23:27,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4202 states to 4202 states and 9998 transitions. [2021-06-06 00:23:27,675 INFO L78 Accepts]: Start accepts. Automaton has 4202 states and 9998 transitions. Word has length 35 [2021-06-06 00:23:27,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:23:27,675 INFO L482 AbstractCegarLoop]: Abstraction has 4202 states and 9998 transitions. [2021-06-06 00:23:27,675 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:23:27,675 INFO L276 IsEmpty]: Start isEmpty. Operand 4202 states and 9998 transitions. [2021-06-06 00:23:27,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-06 00:23:27,679 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:23:27,679 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:23:27,880 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1276 [2021-06-06 00:23:27,880 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:23:27,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:23:27,880 INFO L82 PathProgramCache]: Analyzing trace with hash 739863609, now seen corresponding path program 88 times [2021-06-06 00:23:27,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:23:27,880 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459146235] [2021-06-06 00:23:27,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:23:27,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:23:28,116 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:23:28,117 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:23:28,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459146235] [2021-06-06 00:23:28,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459146235] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:23:28,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875855033] [2021-06-06 00:23:28,117 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 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 [2021-06-06 00:23:28,140 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:23:28,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:23:28,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-06 00:23:28,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:23:28,738 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:23:28,738 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1875855033] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:23:28,738 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:23:28,738 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 31 [2021-06-06 00:23:28,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416975872] [2021-06-06 00:23:28,739 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-06 00:23:28,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:23:28,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-06 00:23:28,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=874, Unknown=0, NotChecked=0, Total=992 [2021-06-06 00:23:28,739 INFO L87 Difference]: Start difference. First operand 4202 states and 9998 transitions. Second operand has 32 states, 32 states have (on average 2.03125) internal successors, (65), 31 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:23:32,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:23:32,843 INFO L93 Difference]: Finished difference Result 7108 states and 16347 transitions. [2021-06-06 00:23:32,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-06-06 00:23:32,843 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.03125) internal successors, (65), 31 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-06 00:23:32,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:23:32,849 INFO L225 Difference]: With dead ends: 7108 [2021-06-06 00:23:32,849 INFO L226 Difference]: Without dead ends: 7017 [2021-06-06 00:23:32,850 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4316 ImplicationChecksByTransitivity, 3623.3ms TimeCoverageRelationStatistics Valid=1552, Invalid=10658, Unknown=0, NotChecked=0, Total=12210 [2021-06-06 00:23:32,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7017 states. [2021-06-06 00:23:32,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7017 to 4409. [2021-06-06 00:23:32,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4409 states, 4408 states have (on average 2.3940562613430125) internal successors, (10553), 4408 states have internal predecessors, (10553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:23:32,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4409 states to 4409 states and 10553 transitions. [2021-06-06 00:23:32,908 INFO L78 Accepts]: Start accepts. Automaton has 4409 states and 10553 transitions. Word has length 35 [2021-06-06 00:23:32,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:23:32,908 INFO L482 AbstractCegarLoop]: Abstraction has 4409 states and 10553 transitions. [2021-06-06 00:23:32,908 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.03125) internal successors, (65), 31 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:23:32,908 INFO L276 IsEmpty]: Start isEmpty. Operand 4409 states and 10553 transitions. [2021-06-06 00:23:32,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-06 00:23:32,912 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:23:32,912 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:23:33,112 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1293,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:23:33,113 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:23:33,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:23:33,113 INFO L82 PathProgramCache]: Analyzing trace with hash -179807687, now seen corresponding path program 89 times [2021-06-06 00:23:33,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:23:33,113 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448107015] [2021-06-06 00:23:33,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:23:33,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:23:33,327 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:23:33,328 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:23:33,328 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448107015] [2021-06-06 00:23:33,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448107015] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:23:33,328 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [447910552] [2021-06-06 00:23:33,328 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 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 [2021-06-06 00:23:33,369 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-06 00:23:33,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:23:33,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-06 00:23:33,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:23:33,720 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:23:33,720 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [447910552] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:23:33,721 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:23:33,721 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14] total 29 [2021-06-06 00:23:33,721 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731899815] [2021-06-06 00:23:33,721 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-06 00:23:33,721 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:23:33,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-06 00:23:33,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=735, Unknown=0, NotChecked=0, Total=812 [2021-06-06 00:23:33,721 INFO L87 Difference]: Start difference. First operand 4409 states and 10553 transitions. Second operand has 29 states, 29 states have (on average 2.2758620689655173) internal successors, (66), 29 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) [2021-06-06 00:23:38,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:23:38,068 INFO L93 Difference]: Finished difference Result 6487 states and 15070 transitions. [2021-06-06 00:23:38,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-06-06 00:23:38,068 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.2758620689655173) internal successors, (66), 29 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 35 [2021-06-06 00:23:38,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:23:38,075 INFO L225 Difference]: With dead ends: 6487 [2021-06-06 00:23:38,075 INFO L226 Difference]: Without dead ends: 6433 [2021-06-06 00:23:38,075 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3538 ImplicationChecksByTransitivity, 3772.4ms TimeCoverageRelationStatistics Valid=1209, Invalid=10347, Unknown=0, NotChecked=0, Total=11556 [2021-06-06 00:23:38,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6433 states. [2021-06-06 00:23:38,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6433 to 4475. [2021-06-06 00:23:38,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4475 states, 4474 states have (on average 2.388913723737148) internal successors, (10688), 4474 states have internal predecessors, (10688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:23:38,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4475 states to 4475 states and 10688 transitions. [2021-06-06 00:23:38,138 INFO L78 Accepts]: Start accepts. Automaton has 4475 states and 10688 transitions. Word has length 35 [2021-06-06 00:23:38,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:23:38,138 INFO L482 AbstractCegarLoop]: Abstraction has 4475 states and 10688 transitions. [2021-06-06 00:23:38,138 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.2758620689655173) internal successors, (66), 29 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) [2021-06-06 00:23:38,138 INFO L276 IsEmpty]: Start isEmpty. Operand 4475 states and 10688 transitions. [2021-06-06 00:23:38,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-06 00:23:38,142 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:23:38,142 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:23:38,342 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1316,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:23:38,343 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:23:38,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:23:38,343 INFO L82 PathProgramCache]: Analyzing trace with hash -724083655, now seen corresponding path program 90 times [2021-06-06 00:23:38,343 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:23:38,343 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562832732] [2021-06-06 00:23:38,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:23:38,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:23:38,625 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-06 00:23:38,625 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:23:38,625 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562832732] [2021-06-06 00:23:38,625 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562832732] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:23:38,625 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [875120443] [2021-06-06 00:23:38,625 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 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 [2021-06-06 00:23:38,652 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-06 00:23:38,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:23:38,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-06 00:23:38,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:23:39,037 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:23:39,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [875120443] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:23:39,037 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:23:39,037 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2021-06-06 00:23:39,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174060563] [2021-06-06 00:23:39,037 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-06 00:23:39,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:23:39,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-06 00:23:39,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=687, Unknown=0, NotChecked=0, Total=812 [2021-06-06 00:23:39,038 INFO L87 Difference]: Start difference. First operand 4475 states and 10688 transitions. Second operand has 29 states, 29 states have (on average 2.206896551724138) internal successors, (64), 28 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:23:40,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:23:40,455 INFO L93 Difference]: Finished difference Result 6393 states and 14863 transitions. [2021-06-06 00:23:40,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-06 00:23:40,455 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.206896551724138) internal successors, (64), 28 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-06 00:23:40,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:23:40,463 INFO L225 Difference]: With dead ends: 6393 [2021-06-06 00:23:40,464 INFO L226 Difference]: Without dead ends: 6357 [2021-06-06 00:23:40,464 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1134 ImplicationChecksByTransitivity, 1436.5ms TimeCoverageRelationStatistics Valid=825, Invalid=3465, Unknown=0, NotChecked=0, Total=4290 [2021-06-06 00:23:40,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6357 states. [2021-06-06 00:23:40,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6357 to 4465. [2021-06-06 00:23:40,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4465 states, 4464 states have (on average 2.3875448028673834) internal successors, (10658), 4464 states have internal predecessors, (10658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:23:40,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4465 states to 4465 states and 10658 transitions. [2021-06-06 00:23:40,566 INFO L78 Accepts]: Start accepts. Automaton has 4465 states and 10658 transitions. Word has length 35 [2021-06-06 00:23:40,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:23:40,566 INFO L482 AbstractCegarLoop]: Abstraction has 4465 states and 10658 transitions. [2021-06-06 00:23:40,567 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.206896551724138) internal successors, (64), 28 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:23:40,567 INFO L276 IsEmpty]: Start isEmpty. Operand 4465 states and 10658 transitions. [2021-06-06 00:23:40,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-06 00:23:40,570 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:23:40,570 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:23:40,770 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1325 [2021-06-06 00:23:40,771 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:23:40,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:23:40,771 INFO L82 PathProgramCache]: Analyzing trace with hash 756997177, now seen corresponding path program 91 times [2021-06-06 00:23:40,771 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:23:40,771 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169367761] [2021-06-06 00:23:40,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:23:40,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:23:40,922 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 2 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:23:40,922 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:23:40,922 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169367761] [2021-06-06 00:23:40,922 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169367761] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:23:40,922 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [558371739] [2021-06-06 00:23:40,922 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 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 [2021-06-06 00:23:40,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:23:40,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-06 00:23:40,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:23:41,541 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:23:41,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [558371739] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:23:41,541 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:23:41,542 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 29 [2021-06-06 00:23:41,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453645872] [2021-06-06 00:23:41,542 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-06 00:23:41,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:23:41,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-06 00:23:41,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=742, Unknown=0, NotChecked=0, Total=870 [2021-06-06 00:23:41,543 INFO L87 Difference]: Start difference. First operand 4465 states and 10658 transitions. Second operand has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 29 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:23:42,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:23:42,881 INFO L93 Difference]: Finished difference Result 5425 states and 12731 transitions. [2021-06-06 00:23:42,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-06 00:23:42,881 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 29 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-06 00:23:42,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:23:42,886 INFO L225 Difference]: With dead ends: 5425 [2021-06-06 00:23:42,886 INFO L226 Difference]: Without dead ends: 5407 [2021-06-06 00:23:42,886 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1128 ImplicationChecksByTransitivity, 1462.7ms TimeCoverageRelationStatistics Valid=797, Invalid=3363, Unknown=0, NotChecked=0, Total=4160 [2021-06-06 00:23:42,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5407 states. [2021-06-06 00:23:42,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5407 to 4211. [2021-06-06 00:23:42,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4211 states, 4210 states have (on average 2.3767220902612824) internal successors, (10006), 4210 states have internal predecessors, (10006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:23:42,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4211 states to 4211 states and 10006 transitions. [2021-06-06 00:23:42,932 INFO L78 Accepts]: Start accepts. Automaton has 4211 states and 10006 transitions. Word has length 35 [2021-06-06 00:23:42,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:23:42,932 INFO L482 AbstractCegarLoop]: Abstraction has 4211 states and 10006 transitions. [2021-06-06 00:23:42,932 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 29 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:23:42,932 INFO L276 IsEmpty]: Start isEmpty. Operand 4211 states and 10006 transitions. [2021-06-06 00:23:42,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-06 00:23:42,935 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:23:42,936 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:23:43,136 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1340,92 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:23:43,136 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:23:43,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:23:43,136 INFO L82 PathProgramCache]: Analyzing trace with hash 938061735, now seen corresponding path program 92 times [2021-06-06 00:23:43,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:23:43,136 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731149022] [2021-06-06 00:23:43,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:23:43,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:23:43,245 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:23:43,245 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:23:43,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731149022] [2021-06-06 00:23:43,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731149022] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:23:43,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [246864569] [2021-06-06 00:23:43,245 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 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 [2021-06-06 00:23:43,294 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:23:43,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:23:43,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-06 00:23:43,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:23:43,759 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 9 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:23:43,760 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [246864569] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:23:43,760 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:23:43,760 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 26 [2021-06-06 00:23:43,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107287486] [2021-06-06 00:23:43,760 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-06 00:23:43,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:23:43,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-06 00:23:43,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=585, Unknown=0, NotChecked=0, Total=702 [2021-06-06 00:23:43,761 INFO L87 Difference]: Start difference. First operand 4211 states and 10006 transitions. Second operand has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:23:44,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:23:44,718 INFO L93 Difference]: Finished difference Result 4658 states and 10935 transitions. [2021-06-06 00:23:44,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-06 00:23:44,718 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-06 00:23:44,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:23:44,722 INFO L225 Difference]: With dead ends: 4658 [2021-06-06 00:23:44,722 INFO L226 Difference]: Without dead ends: 4654 [2021-06-06 00:23:44,722 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 793 ImplicationChecksByTransitivity, 1058.4ms TimeCoverageRelationStatistics Valid=548, Invalid=2644, Unknown=0, NotChecked=0, Total=3192 [2021-06-06 00:23:44,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4654 states. [2021-06-06 00:23:44,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4654 to 4228. [2021-06-06 00:23:44,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4228 states, 4227 states have (on average 2.3763898746155667) internal successors, (10045), 4227 states have internal predecessors, (10045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:23:44,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4228 states to 4228 states and 10045 transitions. [2021-06-06 00:23:44,762 INFO L78 Accepts]: Start accepts. Automaton has 4228 states and 10045 transitions. Word has length 35 [2021-06-06 00:23:44,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:23:44,762 INFO L482 AbstractCegarLoop]: Abstraction has 4228 states and 10045 transitions. [2021-06-06 00:23:44,762 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:23:44,762 INFO L276 IsEmpty]: Start isEmpty. Operand 4228 states and 10045 transitions. [2021-06-06 00:23:44,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-06 00:23:44,765 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:23:44,765 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:23:44,966 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 93 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1363 [2021-06-06 00:23:44,966 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:23:44,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:23:44,966 INFO L82 PathProgramCache]: Analyzing trace with hash -817736003, now seen corresponding path program 93 times [2021-06-06 00:23:44,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:23:44,966 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569247567] [2021-06-06 00:23:44,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:23:44,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:23:45,253 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:23:45,253 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:23:45,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569247567] [2021-06-06 00:23:45,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569247567] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:23:45,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1881137675] [2021-06-06 00:23:45,253 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 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 [2021-06-06 00:23:45,278 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-06 00:23:45,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:23:45,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-06 00:23:45,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:23:45,951 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:23:45,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1881137675] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:23:45,951 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:23:45,951 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 32 [2021-06-06 00:23:45,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744882242] [2021-06-06 00:23:45,951 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-06 00:23:45,951 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:23:45,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-06 00:23:45,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=936, Unknown=0, NotChecked=0, Total=1056 [2021-06-06 00:23:45,952 INFO L87 Difference]: Start difference. First operand 4228 states and 10045 transitions. Second operand has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:23:51,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:23:51,834 INFO L93 Difference]: Finished difference Result 7630 states and 17556 transitions. [2021-06-06 00:23:51,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2021-06-06 00:23:51,834 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-06 00:23:51,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:23:51,841 INFO L225 Difference]: With dead ends: 7630 [2021-06-06 00:23:51,841 INFO L226 Difference]: Without dead ends: 7551 [2021-06-06 00:23:51,843 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7268 ImplicationChecksByTransitivity, 5282.7ms TimeCoverageRelationStatistics Valid=2403, Invalid=16779, Unknown=0, NotChecked=0, Total=19182 [2021-06-06 00:23:51,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7551 states. [2021-06-06 00:23:51,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7551 to 4786. [2021-06-06 00:23:51,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4786 states, 4785 states have (on average 2.400208986415883) internal successors, (11485), 4785 states have internal predecessors, (11485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:23:51,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4786 states to 4786 states and 11485 transitions. [2021-06-06 00:23:51,923 INFO L78 Accepts]: Start accepts. Automaton has 4786 states and 11485 transitions. Word has length 35 [2021-06-06 00:23:51,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:23:51,923 INFO L482 AbstractCegarLoop]: Abstraction has 4786 states and 11485 transitions. [2021-06-06 00:23:51,923 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:23:51,923 INFO L276 IsEmpty]: Start isEmpty. Operand 4786 states and 11485 transitions. [2021-06-06 00:23:51,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-06 00:23:51,926 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:23:51,926 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:23:52,127 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1383,94 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:23:52,127 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:23:52,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:23:52,127 INFO L82 PathProgramCache]: Analyzing trace with hash -756933699, now seen corresponding path program 94 times [2021-06-06 00:23:52,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:23:52,127 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100826247] [2021-06-06 00:23:52,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:23:52,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:23:52,387 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:23:52,387 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:23:52,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100826247] [2021-06-06 00:23:52,387 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100826247] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:23:52,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1857797823] [2021-06-06 00:23:52,388 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 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 [2021-06-06 00:23:52,411 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:23:52,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:23:52,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-06 00:23:52,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:23:53,037 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:23:53,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1857797823] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:23:53,037 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:23:53,037 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 32 [2021-06-06 00:23:53,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676870352] [2021-06-06 00:23:53,037 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-06 00:23:53,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:23:53,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-06 00:23:53,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=943, Unknown=0, NotChecked=0, Total=1056 [2021-06-06 00:23:53,038 INFO L87 Difference]: Start difference. First operand 4786 states and 11485 transitions. Second operand has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:23:58,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:23:58,081 INFO L93 Difference]: Finished difference Result 7197 states and 16708 transitions. [2021-06-06 00:23:58,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2021-06-06 00:23:58,082 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-06 00:23:58,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:23:58,089 INFO L225 Difference]: With dead ends: 7197 [2021-06-06 00:23:58,089 INFO L226 Difference]: Without dead ends: 7141 [2021-06-06 00:23:58,090 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4854 ImplicationChecksByTransitivity, 4669.4ms TimeCoverageRelationStatistics Valid=1899, Invalid=12143, Unknown=0, NotChecked=0, Total=14042 [2021-06-06 00:23:58,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7141 states. [2021-06-06 00:23:58,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7141 to 4905. [2021-06-06 00:23:58,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4905 states, 4904 states have (on average 2.4074225122349104) internal successors, (11806), 4904 states have internal predecessors, (11806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:23:58,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4905 states to 4905 states and 11806 transitions. [2021-06-06 00:23:58,162 INFO L78 Accepts]: Start accepts. Automaton has 4905 states and 11806 transitions. Word has length 35 [2021-06-06 00:23:58,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:23:58,162 INFO L482 AbstractCegarLoop]: Abstraction has 4905 states and 11806 transitions. [2021-06-06 00:23:58,162 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:23:58,162 INFO L276 IsEmpty]: Start isEmpty. Operand 4905 states and 11806 transitions. [2021-06-06 00:23:58,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-06 00:23:58,166 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:23:58,166 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:23:58,366 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1405,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:23:58,366 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:23:58,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:23:58,367 INFO L82 PathProgramCache]: Analyzing trace with hash -156220415, now seen corresponding path program 95 times [2021-06-06 00:23:58,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:23:58,367 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322686405] [2021-06-06 00:23:58,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:23:58,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:23:58,602 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 5 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:23:58,602 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:23:58,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322686405] [2021-06-06 00:23:58,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322686405] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:23:58,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928736433] [2021-06-06 00:23:58,602 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-06 00:23:58,630 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-06 00:23:58,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:23:58,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-06 00:23:58,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:23:59,101 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:23:59,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [928736433] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:23:59,101 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:23:59,101 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2021-06-06 00:23:59,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148215544] [2021-06-06 00:23:59,101 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-06 00:23:59,101 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:23:59,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-06 00:23:59,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=700, Unknown=0, NotChecked=0, Total=812 [2021-06-06 00:23:59,102 INFO L87 Difference]: Start difference. First operand 4905 states and 11806 transitions. Second operand has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:24:01,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:24:01,328 INFO L93 Difference]: Finished difference Result 6702 states and 15725 transitions. [2021-06-06 00:24:01,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-06 00:24:01,328 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-06 00:24:01,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:24:01,334 INFO L225 Difference]: With dead ends: 6702 [2021-06-06 00:24:01,334 INFO L226 Difference]: Without dead ends: 6678 [2021-06-06 00:24:01,334 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1802 ImplicationChecksByTransitivity, 2203.3ms TimeCoverageRelationStatistics Valid=1165, Invalid=4997, Unknown=0, NotChecked=0, Total=6162 [2021-06-06 00:24:01,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6678 states. [2021-06-06 00:24:01,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6678 to 3663. [2021-06-06 00:24:01,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3663 states, 3662 states have (on average 2.367012561441835) internal successors, (8668), 3662 states have internal predecessors, (8668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:24:01,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3663 states to 3663 states and 8668 transitions. [2021-06-06 00:24:01,378 INFO L78 Accepts]: Start accepts. Automaton has 3663 states and 8668 transitions. Word has length 35 [2021-06-06 00:24:01,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:24:01,378 INFO L482 AbstractCegarLoop]: Abstraction has 3663 states and 8668 transitions. [2021-06-06 00:24:01,378 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:24:01,378 INFO L276 IsEmpty]: Start isEmpty. Operand 3663 states and 8668 transitions. [2021-06-06 00:24:01,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-06 00:24:01,381 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:24:01,381 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:24:01,581 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1425,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:24:01,581 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:24:01,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:24:01,581 INFO L82 PathProgramCache]: Analyzing trace with hash 1416553917, now seen corresponding path program 96 times [2021-06-06 00:24:01,582 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:24:01,582 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965443584] [2021-06-06 00:24:01,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:24:01,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:24:01,794 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-06 00:24:01,795 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:24:01,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965443584] [2021-06-06 00:24:01,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965443584] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:24:01,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [3365304] [2021-06-06 00:24:01,795 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 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 [2021-06-06 00:24:01,819 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-06 00:24:01,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:24:01,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-06 00:24:01,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:24:02,393 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:24:02,393 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [3365304] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:24:02,393 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:24:02,393 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 30 [2021-06-06 00:24:02,393 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100165010] [2021-06-06 00:24:02,394 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-06 00:24:02,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:24:02,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-06 00:24:02,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=818, Unknown=0, NotChecked=0, Total=930 [2021-06-06 00:24:02,394 INFO L87 Difference]: Start difference. First operand 3663 states and 8668 transitions. Second operand has 31 states, 31 states have (on average 2.064516129032258) internal successors, (64), 30 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:24:05,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:24:05,611 INFO L93 Difference]: Finished difference Result 5512 states and 12685 transitions. [2021-06-06 00:24:05,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-06 00:24:05,611 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.064516129032258) internal successors, (64), 30 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-06 00:24:05,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:24:05,617 INFO L225 Difference]: With dead ends: 5512 [2021-06-06 00:24:05,617 INFO L226 Difference]: Without dead ends: 5461 [2021-06-06 00:24:05,618 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2673 ImplicationChecksByTransitivity, 3121.4ms TimeCoverageRelationStatistics Valid=1101, Invalid=7089, Unknown=0, NotChecked=0, Total=8190 [2021-06-06 00:24:05,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5461 states. [2021-06-06 00:24:05,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5461 to 3678. [2021-06-06 00:24:05,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3678 states, 3677 states have (on average 2.361435953222736) internal successors, (8683), 3677 states have internal predecessors, (8683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:24:05,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3678 states to 3678 states and 8683 transitions. [2021-06-06 00:24:05,658 INFO L78 Accepts]: Start accepts. Automaton has 3678 states and 8683 transitions. Word has length 35 [2021-06-06 00:24:05,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:24:05,658 INFO L482 AbstractCegarLoop]: Abstraction has 3678 states and 8683 transitions. [2021-06-06 00:24:05,658 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.064516129032258) internal successors, (64), 30 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:24:05,658 INFO L276 IsEmpty]: Start isEmpty. Operand 3678 states and 8683 transitions. [2021-06-06 00:24:05,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-06 00:24:05,660 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:24:05,660 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:24:05,861 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1439 [2021-06-06 00:24:05,861 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:24:05,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:24:05,861 INFO L82 PathProgramCache]: Analyzing trace with hash -756433177, now seen corresponding path program 97 times [2021-06-06 00:24:05,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:24:05,861 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283121249] [2021-06-06 00:24:05,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:24:05,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:24:06,022 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 13 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:24:06,023 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:24:06,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283121249] [2021-06-06 00:24:06,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283121249] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:24:06,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972861197] [2021-06-06 00:24:06,023 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 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 [2021-06-06 00:24:06,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:24:06,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-06 00:24:06,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:24:06,490 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 9 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:24:06,490 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [972861197] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:24:06,490 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:24:06,490 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 26 [2021-06-06 00:24:06,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216810660] [2021-06-06 00:24:06,491 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-06 00:24:06,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:24:06,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-06 00:24:06,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=584, Unknown=0, NotChecked=0, Total=702 [2021-06-06 00:24:06,491 INFO L87 Difference]: Start difference. First operand 3678 states and 8683 transitions. Second operand has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:24:07,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:24:07,992 INFO L93 Difference]: Finished difference Result 4687 states and 10833 transitions. [2021-06-06 00:24:07,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-06 00:24:07,993 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-06 00:24:07,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:24:07,997 INFO L225 Difference]: With dead ends: 4687 [2021-06-06 00:24:07,998 INFO L226 Difference]: Without dead ends: 4675 [2021-06-06 00:24:07,998 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1089 ImplicationChecksByTransitivity, 1368.2ms TimeCoverageRelationStatistics Valid=697, Invalid=3335, Unknown=0, NotChecked=0, Total=4032 [2021-06-06 00:24:08,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4675 states. [2021-06-06 00:24:08,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4675 to 3716. [2021-06-06 00:24:08,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3716 states, 3715 states have (on average 2.364199192462988) internal successors, (8783), 3715 states have internal predecessors, (8783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:24:08,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3716 states to 3716 states and 8783 transitions. [2021-06-06 00:24:08,035 INFO L78 Accepts]: Start accepts. Automaton has 3716 states and 8783 transitions. Word has length 35 [2021-06-06 00:24:08,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:24:08,035 INFO L482 AbstractCegarLoop]: Abstraction has 3716 states and 8783 transitions. [2021-06-06 00:24:08,035 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:24:08,035 INFO L276 IsEmpty]: Start isEmpty. Operand 3716 states and 8783 transitions. [2021-06-06 00:24:08,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-06 00:24:08,038 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:24:08,038 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:24:08,238 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1458 [2021-06-06 00:24:08,239 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:24:08,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:24:08,239 INFO L82 PathProgramCache]: Analyzing trace with hash -869656803, now seen corresponding path program 98 times [2021-06-06 00:24:08,239 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:24:08,239 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351453403] [2021-06-06 00:24:08,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:24:08,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:24:08,349 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:24:08,349 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:24:08,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351453403] [2021-06-06 00:24:08,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351453403] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:24:08,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [72938298] [2021-06-06 00:24:08,349 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 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 [2021-06-06 00:24:08,372 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:24:08,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:24:08,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-06 00:24:08,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:24:08,625 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:24:08,625 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [72938298] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:24:08,625 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:24:08,625 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 29 [2021-06-06 00:24:08,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149400248] [2021-06-06 00:24:08,625 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-06 00:24:08,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:24:08,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-06 00:24:08,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=700, Unknown=0, NotChecked=0, Total=870 [2021-06-06 00:24:08,626 INFO L87 Difference]: Start difference. First operand 3716 states and 8783 transitions. Second operand has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 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) [2021-06-06 00:24:10,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:24:10,033 INFO L93 Difference]: Finished difference Result 5434 states and 12387 transitions. [2021-06-06 00:24:10,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-06 00:24:10,034 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 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 37 [2021-06-06 00:24:10,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:24:10,039 INFO L225 Difference]: With dead ends: 5434 [2021-06-06 00:24:10,039 INFO L226 Difference]: Without dead ends: 5434 [2021-06-06 00:24:10,040 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2268 ImplicationChecksByTransitivity, 1262.7ms TimeCoverageRelationStatistics Valid=2085, Invalid=5925, Unknown=0, NotChecked=0, Total=8010 [2021-06-06 00:24:10,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5434 states. [2021-06-06 00:24:10,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5434 to 4658. [2021-06-06 00:24:10,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4658 states, 4657 states have (on average 2.3474339703671894) internal successors, (10932), 4657 states have internal predecessors, (10932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:24:10,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4658 states to 4658 states and 10932 transitions. [2021-06-06 00:24:10,085 INFO L78 Accepts]: Start accepts. Automaton has 4658 states and 10932 transitions. Word has length 37 [2021-06-06 00:24:10,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:24:10,085 INFO L482 AbstractCegarLoop]: Abstraction has 4658 states and 10932 transitions. [2021-06-06 00:24:10,085 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 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) [2021-06-06 00:24:10,085 INFO L276 IsEmpty]: Start isEmpty. Operand 4658 states and 10932 transitions. [2021-06-06 00:24:10,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-06 00:24:10,089 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:24:10,089 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:24:10,289 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1473,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:24:10,289 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:24:10,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:24:10,290 INFO L82 PathProgramCache]: Analyzing trace with hash -1373714529, now seen corresponding path program 99 times [2021-06-06 00:24:10,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:24:10,290 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207046809] [2021-06-06 00:24:10,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:24:10,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:24:10,353 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 31 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:24:10,353 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:24:10,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207046809] [2021-06-06 00:24:10,353 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207046809] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:24:10,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247730590] [2021-06-06 00:24:10,353 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 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 [2021-06-06 00:24:10,397 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-06-06 00:24:10,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:24:10,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-06 00:24:10,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:24:10,674 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 31 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:24:10,674 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [247730590] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:24:10,674 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:24:10,674 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 16] total 24 [2021-06-06 00:24:10,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576445323] [2021-06-06 00:24:10,674 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-06 00:24:10,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:24:10,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-06 00:24:10,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=471, Unknown=0, NotChecked=0, Total=600 [2021-06-06 00:24:10,675 INFO L87 Difference]: Start difference. First operand 4658 states and 10932 transitions. Second operand has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:24:12,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:24:12,897 INFO L93 Difference]: Finished difference Result 5175 states and 11919 transitions. [2021-06-06 00:24:12,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2021-06-06 00:24:12,897 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-06 00:24:12,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:24:12,902 INFO L225 Difference]: With dead ends: 5175 [2021-06-06 00:24:12,902 INFO L226 Difference]: Without dead ends: 5171 [2021-06-06 00:24:12,903 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4929 ImplicationChecksByTransitivity, 2068.1ms TimeCoverageRelationStatistics Valid=3112, Invalid=10228, Unknown=0, NotChecked=0, Total=13340 [2021-06-06 00:24:12,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5171 states. [2021-06-06 00:24:12,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5171 to 4602. [2021-06-06 00:24:12,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4602 states, 4601 states have (on average 2.344925016300804) internal successors, (10789), 4601 states have internal predecessors, (10789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:24:12,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4602 states to 4602 states and 10789 transitions. [2021-06-06 00:24:12,948 INFO L78 Accepts]: Start accepts. Automaton has 4602 states and 10789 transitions. Word has length 37 [2021-06-06 00:24:12,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:24:12,948 INFO L482 AbstractCegarLoop]: Abstraction has 4602 states and 10789 transitions. [2021-06-06 00:24:12,948 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:24:12,948 INFO L276 IsEmpty]: Start isEmpty. Operand 4602 states and 10789 transitions. [2021-06-06 00:24:12,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-06 00:24:12,952 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:24:12,952 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:24:13,152 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1482,100 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:24:13,152 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:24:13,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:24:13,153 INFO L82 PathProgramCache]: Analyzing trace with hash 1156107053, now seen corresponding path program 100 times [2021-06-06 00:24:13,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:24:13,153 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853231721] [2021-06-06 00:24:13,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:24:13,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:24:13,602 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:24:13,602 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:24:13,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853231721] [2021-06-06 00:24:13,603 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853231721] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:24:13,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2095705875] [2021-06-06 00:24:13,603 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 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 [2021-06-06 00:24:13,626 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:24:13,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:24:13,627 WARN L261 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 54 conjunts are in the unsatisfiable core [2021-06-06 00:24:13,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:24:14,412 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:24:14,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2095705875] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:24:14,412 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:24:14,412 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 35 [2021-06-06 00:24:14,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161737983] [2021-06-06 00:24:14,413 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-06 00:24:14,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:24:14,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-06 00:24:14,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=1131, Unknown=0, NotChecked=0, Total=1260 [2021-06-06 00:24:14,413 INFO L87 Difference]: Start difference. First operand 4602 states and 10789 transitions. Second operand has 36 states, 36 states have (on average 1.8888888888888888) internal successors, (68), 35 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:24:15,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:24:15,949 INFO L93 Difference]: Finished difference Result 5204 states and 12036 transitions. [2021-06-06 00:24:15,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-06 00:24:15,949 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.8888888888888888) internal successors, (68), 35 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-06 00:24:15,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:24:15,954 INFO L225 Difference]: With dead ends: 5204 [2021-06-06 00:24:15,954 INFO L226 Difference]: Without dead ends: 5150 [2021-06-06 00:24:15,955 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 861 ImplicationChecksByTransitivity, 1974.5ms TimeCoverageRelationStatistics Valid=371, Invalid=3051, Unknown=0, NotChecked=0, Total=3422 [2021-06-06 00:24:15,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5150 states. [2021-06-06 00:24:15,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5150 to 4618. [2021-06-06 00:24:15,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4618 states, 4617 states have (on average 2.342863331167425) internal successors, (10817), 4617 states have internal predecessors, (10817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:24:16,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4618 states to 4618 states and 10817 transitions. [2021-06-06 00:24:16,001 INFO L78 Accepts]: Start accepts. Automaton has 4618 states and 10817 transitions. Word has length 37 [2021-06-06 00:24:16,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:24:16,001 INFO L482 AbstractCegarLoop]: Abstraction has 4618 states and 10817 transitions. [2021-06-06 00:24:16,001 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.8888888888888888) internal successors, (68), 35 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:24:16,002 INFO L276 IsEmpty]: Start isEmpty. Operand 4618 states and 10817 transitions. [2021-06-06 00:24:16,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-06 00:24:16,005 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:24:16,005 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:24:16,206 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1490,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:24:16,206 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:24:16,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:24:16,206 INFO L82 PathProgramCache]: Analyzing trace with hash -1012654923, now seen corresponding path program 101 times [2021-06-06 00:24:16,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:24:16,206 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557125383] [2021-06-06 00:24:16,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:24:16,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:24:16,477 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:24:16,477 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:24:16,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557125383] [2021-06-06 00:24:16,477 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557125383] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:24:16,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1267751672] [2021-06-06 00:24:16,477 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 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 [2021-06-06 00:24:16,504 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-06 00:24:16,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:24:16,504 WARN L261 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-06 00:24:16,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:24:17,153 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:24:17,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1267751672] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:24:17,153 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:24:17,154 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 37 [2021-06-06 00:24:17,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311417097] [2021-06-06 00:24:17,154 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-06 00:24:17,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:24:17,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-06 00:24:17,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=1268, Unknown=0, NotChecked=0, Total=1406 [2021-06-06 00:24:17,154 INFO L87 Difference]: Start difference. First operand 4618 states and 10817 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) [2021-06-06 00:24:20,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:24:20,220 INFO L93 Difference]: Finished difference Result 5242 states and 12110 transitions. [2021-06-06 00:24:20,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-06 00:24:20,220 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 37 [2021-06-06 00:24:20,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:24:20,225 INFO L225 Difference]: With dead ends: 5242 [2021-06-06 00:24:20,225 INFO L226 Difference]: Without dead ends: 5242 [2021-06-06 00:24:20,226 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2412 ImplicationChecksByTransitivity, 2828.9ms TimeCoverageRelationStatistics Valid=966, Invalid=7406, Unknown=0, NotChecked=0, Total=8372 [2021-06-06 00:24:20,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5242 states. [2021-06-06 00:24:20,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5242 to 4659. [2021-06-06 00:24:20,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4659 states, 4658 states have (on average 2.343924431086303) internal successors, (10918), 4658 states have internal predecessors, (10918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:24:20,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4659 states to 4659 states and 10918 transitions. [2021-06-06 00:24:20,275 INFO L78 Accepts]: Start accepts. Automaton has 4659 states and 10918 transitions. Word has length 37 [2021-06-06 00:24:20,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:24:20,275 INFO L482 AbstractCegarLoop]: Abstraction has 4659 states and 10918 transitions. [2021-06-06 00:24:20,275 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) [2021-06-06 00:24:20,275 INFO L276 IsEmpty]: Start isEmpty. Operand 4659 states and 10918 transitions. [2021-06-06 00:24:20,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-06 00:24:20,279 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:24:20,279 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:24:20,480 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1513 [2021-06-06 00:24:20,483 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:24:20,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:24:20,483 INFO L82 PathProgramCache]: Analyzing trace with hash -376851599, now seen corresponding path program 102 times [2021-06-06 00:24:20,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:24:20,483 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568613893] [2021-06-06 00:24:20,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:24:20,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:24:20,801 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:24:20,801 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:24:20,801 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568613893] [2021-06-06 00:24:20,801 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568613893] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:24:20,801 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354870806] [2021-06-06 00:24:20,801 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-06 00:24:20,828 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-06 00:24:20,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:24:20,828 WARN L261 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-06 00:24:20,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:24:21,625 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:24:21,625 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1354870806] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:24:21,625 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:24:21,625 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2021-06-06 00:24:21,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832281380] [2021-06-06 00:24:21,625 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-06 00:24:21,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:24:21,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-06 00:24:21,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1214, Unknown=0, NotChecked=0, Total=1332 [2021-06-06 00:24:21,626 INFO L87 Difference]: Start difference. First operand 4659 states and 10918 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) [2021-06-06 00:24:24,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:24:24,348 INFO L93 Difference]: Finished difference Result 5461 states and 12630 transitions. [2021-06-06 00:24:24,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-06 00:24:24,349 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 37 [2021-06-06 00:24:24,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:24:24,354 INFO L225 Difference]: With dead ends: 5461 [2021-06-06 00:24:24,354 INFO L226 Difference]: Without dead ends: 5461 [2021-06-06 00:24:24,354 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1750 ImplicationChecksByTransitivity, 2782.2ms TimeCoverageRelationStatistics Valid=635, Invalid=5845, Unknown=0, NotChecked=0, Total=6480 [2021-06-06 00:24:24,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5461 states. [2021-06-06 00:24:24,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5461 to 4679. [2021-06-06 00:24:24,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4679 states, 4678 states have (on average 2.344164172723386) internal successors, (10966), 4678 states have internal predecessors, (10966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:24:24,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4679 states to 4679 states and 10966 transitions. [2021-06-06 00:24:24,407 INFO L78 Accepts]: Start accepts. Automaton has 4679 states and 10966 transitions. Word has length 37 [2021-06-06 00:24:24,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:24:24,407 INFO L482 AbstractCegarLoop]: Abstraction has 4679 states and 10966 transitions. [2021-06-06 00:24:24,407 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) [2021-06-06 00:24:24,407 INFO L276 IsEmpty]: Start isEmpty. Operand 4679 states and 10966 transitions. [2021-06-06 00:24:24,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-06 00:24:24,414 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:24:24,414 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:24:24,620 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1532,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:24:24,621 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:24:24,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:24:24,621 INFO L82 PathProgramCache]: Analyzing trace with hash 719191221, now seen corresponding path program 103 times [2021-06-06 00:24:24,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:24:24,621 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559120368] [2021-06-06 00:24:24,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:24:24,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:24:24,896 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:24:24,897 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:24:24,897 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559120368] [2021-06-06 00:24:24,897 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559120368] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:24:24,897 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1707291475] [2021-06-06 00:24:24,897 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-06 00:24:24,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:24:24,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 40 conjunts are in the unsatisfiable core [2021-06-06 00:24:24,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:24:25,616 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:24:25,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1707291475] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:24:25,616 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:24:25,616 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2021-06-06 00:24:25,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112371492] [2021-06-06 00:24:25,616 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-06 00:24:25,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:24:25,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-06 00:24:25,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=1207, Unknown=0, NotChecked=0, Total=1332 [2021-06-06 00:24:25,617 INFO L87 Difference]: Start difference. First operand 4679 states and 10966 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) [2021-06-06 00:24:28,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:24:28,580 INFO L93 Difference]: Finished difference Result 5286 states and 12264 transitions. [2021-06-06 00:24:28,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-06 00:24:28,580 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 37 [2021-06-06 00:24:28,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:24:28,585 INFO L225 Difference]: With dead ends: 5286 [2021-06-06 00:24:28,586 INFO L226 Difference]: Without dead ends: 5286 [2021-06-06 00:24:28,586 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1815 ImplicationChecksByTransitivity, 2729.7ms TimeCoverageRelationStatistics Valid=699, Invalid=6273, Unknown=0, NotChecked=0, Total=6972 [2021-06-06 00:24:28,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5286 states. [2021-06-06 00:24:28,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5286 to 4683. [2021-06-06 00:24:28,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4683 states, 4682 states have (on average 2.344724476719351) internal successors, (10978), 4682 states have internal predecessors, (10978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:24:28,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4683 states to 4683 states and 10978 transitions. [2021-06-06 00:24:28,639 INFO L78 Accepts]: Start accepts. Automaton has 4683 states and 10978 transitions. Word has length 37 [2021-06-06 00:24:28,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:24:28,639 INFO L482 AbstractCegarLoop]: Abstraction has 4683 states and 10978 transitions. [2021-06-06 00:24:28,639 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) [2021-06-06 00:24:28,639 INFO L276 IsEmpty]: Start isEmpty. Operand 4683 states and 10978 transitions. [2021-06-06 00:24:28,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-06 00:24:28,643 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:24:28,643 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:24:28,843 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1551 [2021-06-06 00:24:28,844 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:24:28,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:24:28,844 INFO L82 PathProgramCache]: Analyzing trace with hash 1551615737, now seen corresponding path program 104 times [2021-06-06 00:24:28,844 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:24:28,844 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126213250] [2021-06-06 00:24:28,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:24:28,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:24:29,173 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:24:29,173 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:24:29,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126213250] [2021-06-06 00:24:29,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126213250] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:24:29,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1336069978] [2021-06-06 00:24:29,174 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 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 [2021-06-06 00:24:29,197 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:24:29,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:24:29,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-06 00:24:29,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:24:29,702 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 8 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:24:29,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1336069978] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:24:29,702 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:24:29,702 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 35 [2021-06-06 00:24:29,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619260522] [2021-06-06 00:24:29,702 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-06 00:24:29,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:24:29,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-06 00:24:29,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1157, Unknown=0, NotChecked=0, Total=1260 [2021-06-06 00:24:29,703 INFO L87 Difference]: Start difference. First operand 4683 states and 10978 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) [2021-06-06 00:24:36,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:24:36,062 INFO L93 Difference]: Finished difference Result 6084 states and 13860 transitions. [2021-06-06 00:24:36,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 130 states. [2021-06-06 00:24:36,063 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 37 [2021-06-06 00:24:36,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:24:36,068 INFO L225 Difference]: With dead ends: 6084 [2021-06-06 00:24:36,068 INFO L226 Difference]: Without dead ends: 6042 [2021-06-06 00:24:36,069 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7850 ImplicationChecksByTransitivity, 5615.5ms TimeCoverageRelationStatistics Valid=1871, Invalid=21081, Unknown=0, NotChecked=0, Total=22952 [2021-06-06 00:24:36,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6042 states. [2021-06-06 00:24:36,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6042 to 4770. [2021-06-06 00:24:36,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4770 states, 4769 states have (on average 2.3514363598238623) internal successors, (11214), 4769 states have internal predecessors, (11214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:24:36,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4770 states to 4770 states and 11214 transitions. [2021-06-06 00:24:36,126 INFO L78 Accepts]: Start accepts. Automaton has 4770 states and 11214 transitions. Word has length 37 [2021-06-06 00:24:36,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:24:36,126 INFO L482 AbstractCegarLoop]: Abstraction has 4770 states and 11214 transitions. [2021-06-06 00:24:36,126 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) [2021-06-06 00:24:36,126 INFO L276 IsEmpty]: Start isEmpty. Operand 4770 states and 11214 transitions. [2021-06-06 00:24:36,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-06 00:24:36,130 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:24:36,130 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:24:36,330 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1568 [2021-06-06 00:24:36,331 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:24:36,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:24:36,331 INFO L82 PathProgramCache]: Analyzing trace with hash 1422873149, now seen corresponding path program 105 times [2021-06-06 00:24:36,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:24:36,331 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238595246] [2021-06-06 00:24:36,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:24:36,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:24:36,593 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:24:36,593 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:24:36,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238595246] [2021-06-06 00:24:36,593 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238595246] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:24:36,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2111122552] [2021-06-06 00:24:36,594 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 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 [2021-06-06 00:24:36,618 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-06 00:24:36,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:24:36,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-06 00:24:36,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:24:37,202 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 8 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:24:37,202 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2111122552] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:24:37,202 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:24:37,202 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 35 [2021-06-06 00:24:37,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613165717] [2021-06-06 00:24:37,202 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-06 00:24:37,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:24:37,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-06 00:24:37,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1143, Unknown=0, NotChecked=0, Total=1260 [2021-06-06 00:24:37,203 INFO L87 Difference]: Start difference. First operand 4770 states and 11214 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) [2021-06-06 00:24:41,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:24:41,797 INFO L93 Difference]: Finished difference Result 6513 states and 14860 transitions. [2021-06-06 00:24:41,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2021-06-06 00:24:41,797 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 37 [2021-06-06 00:24:41,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:24:41,803 INFO L225 Difference]: With dead ends: 6513 [2021-06-06 00:24:41,803 INFO L226 Difference]: Without dead ends: 6447 [2021-06-06 00:24:41,804 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4973 ImplicationChecksByTransitivity, 4208.0ms TimeCoverageRelationStatistics Valid=1486, Invalid=12794, Unknown=0, NotChecked=0, Total=14280 [2021-06-06 00:24:41,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6447 states. [2021-06-06 00:24:41,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6447 to 4842. [2021-06-06 00:24:41,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4842 states, 4841 states have (on average 2.3462094608551953) internal successors, (11358), 4841 states have internal predecessors, (11358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:24:41,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4842 states to 4842 states and 11358 transitions. [2021-06-06 00:24:41,856 INFO L78 Accepts]: Start accepts. Automaton has 4842 states and 11358 transitions. Word has length 37 [2021-06-06 00:24:41,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:24:41,856 INFO L482 AbstractCegarLoop]: Abstraction has 4842 states and 11358 transitions. [2021-06-06 00:24:41,856 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) [2021-06-06 00:24:41,856 INFO L276 IsEmpty]: Start isEmpty. Operand 4842 states and 11358 transitions. [2021-06-06 00:24:41,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-06 00:24:41,860 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:24:41,860 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:24:42,060 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1588 [2021-06-06 00:24:42,060 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:24:42,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:24:42,061 INFO L82 PathProgramCache]: Analyzing trace with hash -196919433, now seen corresponding path program 106 times [2021-06-06 00:24:42,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:24:42,061 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043023858] [2021-06-06 00:24:42,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:24:42,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:24:42,363 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:24:42,364 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:24:42,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043023858] [2021-06-06 00:24:42,364 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043023858] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:24:42,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2015222325] [2021-06-06 00:24:42,364 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 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 [2021-06-06 00:24:42,389 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:24:42,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:24:42,390 WARN L261 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-06 00:24:42,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:24:43,048 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:24:43,048 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2015222325] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:24:43,048 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:24:43,048 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 30 [2021-06-06 00:24:43,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644854599] [2021-06-06 00:24:43,048 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-06 00:24:43,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:24:43,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-06 00:24:43,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=827, Unknown=0, NotChecked=0, Total=930 [2021-06-06 00:24:43,049 INFO L87 Difference]: Start difference. First operand 4842 states and 11358 transitions. Second operand has 31 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 30 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:24:45,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:24:45,080 INFO L93 Difference]: Finished difference Result 5247 states and 12151 transitions. [2021-06-06 00:24:45,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-06 00:24:45,081 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 30 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-06 00:24:45,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:24:45,086 INFO L225 Difference]: With dead ends: 5247 [2021-06-06 00:24:45,086 INFO L226 Difference]: Without dead ends: 5247 [2021-06-06 00:24:45,086 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1042 ImplicationChecksByTransitivity, 2060.5ms TimeCoverageRelationStatistics Valid=444, Invalid=3588, Unknown=0, NotChecked=0, Total=4032 [2021-06-06 00:24:45,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5247 states. [2021-06-06 00:24:45,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5247 to 4860. [2021-06-06 00:24:45,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4860 states, 4859 states have (on average 2.3461617616793577) internal successors, (11400), 4859 states have internal predecessors, (11400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:24:45,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4860 states to 4860 states and 11400 transitions. [2021-06-06 00:24:45,161 INFO L78 Accepts]: Start accepts. Automaton has 4860 states and 11400 transitions. Word has length 37 [2021-06-06 00:24:45,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:24:45,161 INFO L482 AbstractCegarLoop]: Abstraction has 4860 states and 11400 transitions. [2021-06-06 00:24:45,161 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 30 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:24:45,161 INFO L276 IsEmpty]: Start isEmpty. Operand 4860 states and 11400 transitions. [2021-06-06 00:24:45,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-06 00:24:45,165 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:24:45,165 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:24:45,365 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1608,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:24:45,366 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:24:45,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:24:45,366 INFO L82 PathProgramCache]: Analyzing trace with hash 1929285887, now seen corresponding path program 107 times [2021-06-06 00:24:45,366 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:24:45,366 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692986923] [2021-06-06 00:24:45,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:24:45,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:24:45,732 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:24:45,732 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:24:45,733 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692986923] [2021-06-06 00:24:45,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692986923] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:24:45,733 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [711711672] [2021-06-06 00:24:45,733 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-06 00:24:45,760 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-06 00:24:45,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:24:45,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-06 00:24:45,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:24:46,496 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:24:46,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [711711672] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:24:46,496 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:24:46,496 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 30 [2021-06-06 00:24:46,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464238792] [2021-06-06 00:24:46,497 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-06 00:24:46,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:24:46,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-06 00:24:46,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=838, Unknown=0, NotChecked=0, Total=930 [2021-06-06 00:24:46,497 INFO L87 Difference]: Start difference. First operand 4860 states and 11400 transitions. Second operand has 31 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 30 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:24:49,151 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 52 [2021-06-06 00:24:49,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:24:49,710 INFO L93 Difference]: Finished difference Result 5227 states and 12121 transitions. [2021-06-06 00:24:49,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-06 00:24:49,710 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 30 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-06 00:24:49,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:24:49,715 INFO L225 Difference]: With dead ends: 5227 [2021-06-06 00:24:49,715 INFO L226 Difference]: Without dead ends: 5227 [2021-06-06 00:24:49,716 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1578 ImplicationChecksByTransitivity, 3128.3ms TimeCoverageRelationStatistics Valid=669, Invalid=5183, Unknown=0, NotChecked=0, Total=5852 [2021-06-06 00:24:49,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5227 states. [2021-06-06 00:24:49,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5227 to 4864. [2021-06-06 00:24:49,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4864 states, 4863 states have (on average 2.346699568167798) internal successors, (11412), 4863 states have internal predecessors, (11412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:24:49,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4864 states to 4864 states and 11412 transitions. [2021-06-06 00:24:49,779 INFO L78 Accepts]: Start accepts. Automaton has 4864 states and 11412 transitions. Word has length 37 [2021-06-06 00:24:49,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:24:49,780 INFO L482 AbstractCegarLoop]: Abstraction has 4864 states and 11412 transitions. [2021-06-06 00:24:49,780 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 30 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:24:49,780 INFO L276 IsEmpty]: Start isEmpty. Operand 4864 states and 11412 transitions. [2021-06-06 00:24:49,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-06 00:24:49,784 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:24:49,784 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:24:49,984 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1629,108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:24:49,984 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:24:49,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:24:49,985 INFO L82 PathProgramCache]: Analyzing trace with hash -1533256893, now seen corresponding path program 108 times [2021-06-06 00:24:49,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:24:49,985 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513673361] [2021-06-06 00:24:49,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:24:49,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:24:50,288 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:24:50,289 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:24:50,289 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513673361] [2021-06-06 00:24:50,289 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513673361] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:24:50,289 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1073673086] [2021-06-06 00:24:50,289 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 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 [2021-06-06 00:24:50,315 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-06 00:24:50,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:24:50,316 WARN L261 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-06 00:24:50,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:24:51,051 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:24:51,051 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1073673086] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:24:51,051 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:24:51,051 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 30 [2021-06-06 00:24:51,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24520227] [2021-06-06 00:24:51,051 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-06 00:24:51,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:24:51,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-06 00:24:51,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=830, Unknown=0, NotChecked=0, Total=930 [2021-06-06 00:24:51,052 INFO L87 Difference]: Start difference. First operand 4864 states and 11412 transitions. Second operand has 31 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 30 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:24:53,957 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 49 [2021-06-06 00:24:54,147 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 43 [2021-06-06 00:24:54,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:24:54,336 INFO L93 Difference]: Finished difference Result 5273 states and 12215 transitions. [2021-06-06 00:24:54,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-06 00:24:54,349 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 30 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-06 00:24:54,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:24:54,353 INFO L225 Difference]: With dead ends: 5273 [2021-06-06 00:24:54,353 INFO L226 Difference]: Without dead ends: 5273 [2021-06-06 00:24:54,353 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1911 ImplicationChecksByTransitivity, 3253.4ms TimeCoverageRelationStatistics Valid=786, Invalid=5856, Unknown=0, NotChecked=0, Total=6642 [2021-06-06 00:24:54,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5273 states. [2021-06-06 00:24:54,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5273 to 4870. [2021-06-06 00:24:54,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4870 states, 4869 states have (on average 2.347915383035531) internal successors, (11432), 4869 states have internal predecessors, (11432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:24:54,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4870 states to 4870 states and 11432 transitions. [2021-06-06 00:24:54,400 INFO L78 Accepts]: Start accepts. Automaton has 4870 states and 11432 transitions. Word has length 37 [2021-06-06 00:24:54,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:24:54,400 INFO L482 AbstractCegarLoop]: Abstraction has 4870 states and 11432 transitions. [2021-06-06 00:24:54,400 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 30 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:24:54,400 INFO L276 IsEmpty]: Start isEmpty. Operand 4870 states and 11432 transitions. [2021-06-06 00:24:54,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-06 00:24:54,404 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:24:54,404 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:24:54,604 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 109 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1650 [2021-06-06 00:24:54,604 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:24:54,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:24:54,605 INFO L82 PathProgramCache]: Analyzing trace with hash -1661999481, now seen corresponding path program 109 times [2021-06-06 00:24:54,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:24:54,605 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627909195] [2021-06-06 00:24:54,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:24:54,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:24:54,922 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:24:54,922 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:24:54,922 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627909195] [2021-06-06 00:24:54,922 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627909195] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:24:54,922 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [649100952] [2021-06-06 00:24:54,922 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 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 [2021-06-06 00:24:54,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:24:54,948 WARN L261 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-06 00:24:54,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:24:55,711 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:24:55,711 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [649100952] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:24:55,711 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:24:55,711 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 30 [2021-06-06 00:24:55,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228335463] [2021-06-06 00:24:55,711 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-06 00:24:55,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:24:55,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-06 00:24:55,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=814, Unknown=0, NotChecked=0, Total=930 [2021-06-06 00:24:55,712 INFO L87 Difference]: Start difference. First operand 4870 states and 11432 transitions. Second operand has 31 states, 31 states have (on average 1.8709677419354838) internal successors, (58), 30 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:24:59,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:24:59,273 INFO L93 Difference]: Finished difference Result 5834 states and 13420 transitions. [2021-06-06 00:24:59,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-06-06 00:24:59,274 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8709677419354838) internal successors, (58), 30 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-06 00:24:59,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:24:59,278 INFO L225 Difference]: With dead ends: 5834 [2021-06-06 00:24:59,278 INFO L226 Difference]: Without dead ends: 5834 [2021-06-06 00:24:59,279 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2240 ImplicationChecksByTransitivity, 3494.3ms TimeCoverageRelationStatistics Valid=930, Invalid=6552, Unknown=0, NotChecked=0, Total=7482 [2021-06-06 00:24:59,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5834 states. [2021-06-06 00:24:59,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5834 to 4915. [2021-06-06 00:24:59,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4915 states, 4914 states have (on average 2.349409849409849) internal successors, (11545), 4914 states have internal predecessors, (11545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:24:59,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4915 states to 4915 states and 11545 transitions. [2021-06-06 00:24:59,328 INFO L78 Accepts]: Start accepts. Automaton has 4915 states and 11545 transitions. Word has length 37 [2021-06-06 00:24:59,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:24:59,329 INFO L482 AbstractCegarLoop]: Abstraction has 4915 states and 11545 transitions. [2021-06-06 00:24:59,329 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.8709677419354838) internal successors, (58), 30 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:24:59,329 INFO L276 IsEmpty]: Start isEmpty. Operand 4915 states and 11545 transitions. [2021-06-06 00:24:59,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-06 00:24:59,333 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:24:59,333 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:24:59,533 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1670,110 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:24:59,534 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:24:59,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:24:59,534 INFO L82 PathProgramCache]: Analyzing trace with hash -1011930511, now seen corresponding path program 110 times [2021-06-06 00:24:59,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:24:59,534 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498070435] [2021-06-06 00:24:59,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:24:59,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:24:59,871 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:24:59,872 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:24:59,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498070435] [2021-06-06 00:24:59,872 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498070435] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:24:59,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [376945358] [2021-06-06 00:24:59,872 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-06 00:24:59,896 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:24:59,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:24:59,897 WARN L261 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-06 00:24:59,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:25:00,545 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:25:00,546 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [376945358] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:25:00,546 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:25:00,546 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 31 [2021-06-06 00:25:00,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088452607] [2021-06-06 00:25:00,546 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-06 00:25:00,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:25:00,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-06 00:25:00,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=888, Unknown=0, NotChecked=0, Total=992 [2021-06-06 00:25:00,546 INFO L87 Difference]: Start difference. First operand 4915 states and 11545 transitions. Second operand has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:25:03,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:25:03,907 INFO L93 Difference]: Finished difference Result 5198 states and 12074 transitions. [2021-06-06 00:25:03,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-06-06 00:25:03,907 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-06 00:25:03,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:25:03,912 INFO L225 Difference]: With dead ends: 5198 [2021-06-06 00:25:03,912 INFO L226 Difference]: Without dead ends: 5194 [2021-06-06 00:25:03,912 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1577 ImplicationChecksByTransitivity, 3118.3ms TimeCoverageRelationStatistics Valid=695, Invalid=5467, Unknown=0, NotChecked=0, Total=6162 [2021-06-06 00:25:03,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5194 states. [2021-06-06 00:25:03,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5194 to 4902. [2021-06-06 00:25:03,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4902 states, 4901 states have (on average 2.3472760661089573) internal successors, (11504), 4901 states have internal predecessors, (11504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:25:03,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4902 states to 4902 states and 11504 transitions. [2021-06-06 00:25:03,972 INFO L78 Accepts]: Start accepts. Automaton has 4902 states and 11504 transitions. Word has length 37 [2021-06-06 00:25:03,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:25:03,973 INFO L482 AbstractCegarLoop]: Abstraction has 4902 states and 11504 transitions. [2021-06-06 00:25:03,973 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:25:03,973 INFO L276 IsEmpty]: Start isEmpty. Operand 4902 states and 11504 transitions. [2021-06-06 00:25:03,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-06 00:25:03,978 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:25:03,978 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:25:04,180 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1695 [2021-06-06 00:25:04,180 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:25:04,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:25:04,180 INFO L82 PathProgramCache]: Analyzing trace with hash 783554167, now seen corresponding path program 111 times [2021-06-06 00:25:04,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:25:04,180 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380760931] [2021-06-06 00:25:04,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:25:04,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:25:04,463 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:25:04,464 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:25:04,464 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380760931] [2021-06-06 00:25:04,464 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380760931] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:25:04,464 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [19231725] [2021-06-06 00:25:04,464 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 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 [2021-06-06 00:25:04,491 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-06 00:25:04,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:25:04,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-06 00:25:04,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:25:04,897 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 14 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:25:04,898 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [19231725] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:25:04,898 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:25:04,898 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 15] total 32 [2021-06-06 00:25:04,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078538755] [2021-06-06 00:25:04,898 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-06 00:25:04,898 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:25:04,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-06 00:25:04,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=906, Unknown=0, NotChecked=0, Total=992 [2021-06-06 00:25:04,898 INFO L87 Difference]: Start difference. First operand 4902 states and 11504 transitions. Second operand has 32 states, 32 states have (on average 2.15625) internal successors, (69), 32 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) [2021-06-06 00:25:08,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:25:08,364 INFO L93 Difference]: Finished difference Result 6564 states and 15090 transitions. [2021-06-06 00:25:08,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-06-06 00:25:08,364 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.15625) internal successors, (69), 32 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 37 [2021-06-06 00:25:08,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:25:08,371 INFO L225 Difference]: With dead ends: 6564 [2021-06-06 00:25:08,371 INFO L226 Difference]: Without dead ends: 6360 [2021-06-06 00:25:08,371 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2172 ImplicationChecksByTransitivity, 2890.0ms TimeCoverageRelationStatistics Valid=758, Invalid=7432, Unknown=0, NotChecked=0, Total=8190 [2021-06-06 00:25:08,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6360 states. [2021-06-06 00:25:08,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6360 to 5277. [2021-06-06 00:25:08,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5277 states, 5276 states have (on average 2.3421152388172857) internal successors, (12357), 5276 states have internal predecessors, (12357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:25:08,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5277 states to 5277 states and 12357 transitions. [2021-06-06 00:25:08,441 INFO L78 Accepts]: Start accepts. Automaton has 5277 states and 12357 transitions. Word has length 37 [2021-06-06 00:25:08,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:25:08,441 INFO L482 AbstractCegarLoop]: Abstraction has 5277 states and 12357 transitions. [2021-06-06 00:25:08,442 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.15625) internal successors, (69), 32 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) [2021-06-06 00:25:08,442 INFO L276 IsEmpty]: Start isEmpty. Operand 5277 states and 12357 transitions. [2021-06-06 00:25:08,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-06 00:25:08,446 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:25:08,446 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:25:08,646 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1715 [2021-06-06 00:25:08,646 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:25:08,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:25:08,647 INFO L82 PathProgramCache]: Analyzing trace with hash -136117129, now seen corresponding path program 112 times [2021-06-06 00:25:08,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:25:08,647 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94304338] [2021-06-06 00:25:08,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:25:08,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:25:08,947 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:25:08,947 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:25:08,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94304338] [2021-06-06 00:25:08,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94304338] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:25:08,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1386996853] [2021-06-06 00:25:08,947 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 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 [2021-06-06 00:25:08,974 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:25:08,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:25:08,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-06 00:25:08,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:25:09,559 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:25:09,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1386996853] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:25:09,559 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:25:09,559 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 31 [2021-06-06 00:25:09,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056580316] [2021-06-06 00:25:09,560 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-06 00:25:09,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:25:09,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-06 00:25:09,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=882, Unknown=0, NotChecked=0, Total=992 [2021-06-06 00:25:09,560 INFO L87 Difference]: Start difference. First operand 5277 states and 12357 transitions. Second operand has 32 states, 32 states have (on average 2.09375) internal successors, (67), 31 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) [2021-06-06 00:25:12,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:25:12,265 INFO L93 Difference]: Finished difference Result 7190 states and 16637 transitions. [2021-06-06 00:25:12,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-06 00:25:12,265 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.09375) internal successors, (67), 31 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 37 [2021-06-06 00:25:12,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:25:12,272 INFO L225 Difference]: With dead ends: 7190 [2021-06-06 00:25:12,272 INFO L226 Difference]: Without dead ends: 7127 [2021-06-06 00:25:12,273 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1531 ImplicationChecksByTransitivity, 2517.5ms TimeCoverageRelationStatistics Valid=766, Invalid=4784, Unknown=0, NotChecked=0, Total=5550 [2021-06-06 00:25:12,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7127 states. [2021-06-06 00:25:12,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7127 to 5386. [2021-06-06 00:25:12,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5386 states, 5385 states have (on average 2.337418755803157) internal successors, (12587), 5385 states have internal predecessors, (12587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:25:12,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5386 states to 5386 states and 12587 transitions. [2021-06-06 00:25:12,333 INFO L78 Accepts]: Start accepts. Automaton has 5386 states and 12587 transitions. Word has length 37 [2021-06-06 00:25:12,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:25:12,333 INFO L482 AbstractCegarLoop]: Abstraction has 5386 states and 12587 transitions. [2021-06-06 00:25:12,333 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.09375) internal successors, (67), 31 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) [2021-06-06 00:25:12,333 INFO L276 IsEmpty]: Start isEmpty. Operand 5386 states and 12587 transitions. [2021-06-06 00:25:12,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-06 00:25:12,338 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:25:12,338 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:25:12,538 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1730 [2021-06-06 00:25:12,539 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:25:12,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:25:12,539 INFO L82 PathProgramCache]: Analyzing trace with hash 1645417915, now seen corresponding path program 113 times [2021-06-06 00:25:12,539 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:25:12,539 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917125303] [2021-06-06 00:25:12,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:25:12,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:25:12,799 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:25:12,799 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:25:12,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917125303] [2021-06-06 00:25:12,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917125303] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:25:12,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311811334] [2021-06-06 00:25:12,799 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-06 00:25:12,826 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-06 00:25:12,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:25:12,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-06 00:25:12,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:25:13,453 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:25:13,454 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1311811334] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:25:13,454 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:25:13,454 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 31 [2021-06-06 00:25:13,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156402551] [2021-06-06 00:25:13,454 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-06 00:25:13,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:25:13,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-06 00:25:13,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=882, Unknown=0, NotChecked=0, Total=992 [2021-06-06 00:25:13,454 INFO L87 Difference]: Start difference. First operand 5386 states and 12587 transitions. Second operand has 32 states, 32 states have (on average 2.09375) internal successors, (67), 31 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) [2021-06-06 00:25:16,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:25:16,777 INFO L93 Difference]: Finished difference Result 7812 states and 17955 transitions. [2021-06-06 00:25:16,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-06-06 00:25:16,778 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.09375) internal successors, (67), 31 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 37 [2021-06-06 00:25:16,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:25:16,785 INFO L225 Difference]: With dead ends: 7812 [2021-06-06 00:25:16,786 INFO L226 Difference]: Without dead ends: 7773 [2021-06-06 00:25:16,786 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2156 ImplicationChecksByTransitivity, 3157.5ms TimeCoverageRelationStatistics Valid=993, Invalid=6147, Unknown=0, NotChecked=0, Total=7140 [2021-06-06 00:25:16,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7773 states. [2021-06-06 00:25:16,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7773 to 5464. [2021-06-06 00:25:16,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5464 states, 5463 states have (on average 2.33479773018488) internal successors, (12755), 5463 states have internal predecessors, (12755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:25:16,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5464 states to 5464 states and 12755 transitions. [2021-06-06 00:25:16,856 INFO L78 Accepts]: Start accepts. Automaton has 5464 states and 12755 transitions. Word has length 37 [2021-06-06 00:25:16,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:25:16,856 INFO L482 AbstractCegarLoop]: Abstraction has 5464 states and 12755 transitions. [2021-06-06 00:25:16,856 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.09375) internal successors, (67), 31 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) [2021-06-06 00:25:16,856 INFO L276 IsEmpty]: Start isEmpty. Operand 5464 states and 12755 transitions. [2021-06-06 00:25:16,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-06 00:25:16,861 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:25:16,861 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:25:17,061 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1754 [2021-06-06 00:25:17,062 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:25:17,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:25:17,062 INFO L82 PathProgramCache]: Analyzing trace with hash 1356769279, now seen corresponding path program 114 times [2021-06-06 00:25:17,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:25:17,062 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807275463] [2021-06-06 00:25:17,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:25:17,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:25:17,385 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:25:17,385 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:25:17,385 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807275463] [2021-06-06 00:25:17,385 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807275463] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:25:17,385 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [985875308] [2021-06-06 00:25:17,385 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-06 00:25:17,412 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-06 00:25:17,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:25:17,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-06 00:25:17,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:25:18,001 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:25:18,002 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [985875308] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:25:18,002 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:25:18,002 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 17] total 32 [2021-06-06 00:25:18,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066559223] [2021-06-06 00:25:18,002 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-06 00:25:18,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:25:18,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-06 00:25:18,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=905, Unknown=0, NotChecked=0, Total=1056 [2021-06-06 00:25:18,002 INFO L87 Difference]: Start difference. First operand 5464 states and 12755 transitions. Second operand has 33 states, 33 states have (on average 2.0303030303030303) internal successors, (67), 32 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) [2021-06-06 00:25:22,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:25:22,239 INFO L93 Difference]: Finished difference Result 7788 states and 17905 transitions. [2021-06-06 00:25:22,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-06-06 00:25:22,239 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0303030303030303) internal successors, (67), 32 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 37 [2021-06-06 00:25:22,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:25:22,246 INFO L225 Difference]: With dead ends: 7788 [2021-06-06 00:25:22,246 INFO L226 Difference]: Without dead ends: 7746 [2021-06-06 00:25:22,247 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2989 ImplicationChecksByTransitivity, 3897.0ms TimeCoverageRelationStatistics Valid=1316, Invalid=7614, Unknown=0, NotChecked=0, Total=8930 [2021-06-06 00:25:22,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7746 states. [2021-06-06 00:25:22,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7746 to 5484. [2021-06-06 00:25:22,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5484 states, 5483 states have (on average 2.335400328287434) internal successors, (12805), 5483 states have internal predecessors, (12805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:25:22,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5484 states to 5484 states and 12805 transitions. [2021-06-06 00:25:22,311 INFO L78 Accepts]: Start accepts. Automaton has 5484 states and 12805 transitions. Word has length 37 [2021-06-06 00:25:22,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:25:22,311 INFO L482 AbstractCegarLoop]: Abstraction has 5484 states and 12805 transitions. [2021-06-06 00:25:22,311 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.0303030303030303) internal successors, (67), 32 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) [2021-06-06 00:25:22,311 INFO L276 IsEmpty]: Start isEmpty. Operand 5484 states and 12805 transitions. [2021-06-06 00:25:22,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-06 00:25:22,316 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:25:22,316 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:25:22,516 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1774,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:25:22,516 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:25:22,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:25:22,516 INFO L82 PathProgramCache]: Analyzing trace with hash -1945861701, now seen corresponding path program 115 times [2021-06-06 00:25:22,516 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:25:22,516 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159649181] [2021-06-06 00:25:22,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:25:22,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:25:22,748 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:25:22,748 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:25:22,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159649181] [2021-06-06 00:25:22,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1159649181] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:25:22,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [305743019] [2021-06-06 00:25:22,748 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 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 [2021-06-06 00:25:22,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:25:22,775 WARN L261 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-06 00:25:22,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:25:23,409 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:25:23,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [305743019] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:25:23,409 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:25:23,409 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19] total 35 [2021-06-06 00:25:23,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239255655] [2021-06-06 00:25:23,409 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-06 00:25:23,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:25:23,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-06 00:25:23,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1149, Unknown=0, NotChecked=0, Total=1260 [2021-06-06 00:25:23,410 INFO L87 Difference]: Start difference. First operand 5484 states and 12805 transitions. Second operand has 36 states, 36 states have (on average 1.9166666666666667) internal successors, (69), 35 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) [2021-06-06 00:25:26,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:25:26,076 INFO L93 Difference]: Finished difference Result 5965 states and 13762 transitions. [2021-06-06 00:25:26,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-06 00:25:26,077 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9166666666666667) internal successors, (69), 35 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 37 [2021-06-06 00:25:26,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:25:26,084 INFO L225 Difference]: With dead ends: 5965 [2021-06-06 00:25:26,084 INFO L226 Difference]: Without dead ends: 5935 [2021-06-06 00:25:26,085 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1952 ImplicationChecksByTransitivity, 2419.8ms TimeCoverageRelationStatistics Valid=658, Invalid=6148, Unknown=0, NotChecked=0, Total=6806 [2021-06-06 00:25:26,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5935 states. [2021-06-06 00:25:26,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5935 to 5492. [2021-06-06 00:25:26,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5492 states, 5491 states have (on average 2.3352759060280457) internal successors, (12823), 5491 states have internal predecessors, (12823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:25:26,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5492 states to 5492 states and 12823 transitions. [2021-06-06 00:25:26,150 INFO L78 Accepts]: Start accepts. Automaton has 5492 states and 12823 transitions. Word has length 37 [2021-06-06 00:25:26,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:25:26,150 INFO L482 AbstractCegarLoop]: Abstraction has 5492 states and 12823 transitions. [2021-06-06 00:25:26,150 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.9166666666666667) internal successors, (69), 35 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) [2021-06-06 00:25:26,150 INFO L276 IsEmpty]: Start isEmpty. Operand 5492 states and 12823 transitions. [2021-06-06 00:25:26,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-06 00:25:26,155 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:25:26,155 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:25:26,356 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1794 [2021-06-06 00:25:26,356 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:25:26,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:25:26,357 INFO L82 PathProgramCache]: Analyzing trace with hash -1113437185, now seen corresponding path program 116 times [2021-06-06 00:25:26,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:25:26,357 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528837967] [2021-06-06 00:25:26,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:25:26,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:25:26,612 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:25:26,612 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:25:26,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528837967] [2021-06-06 00:25:26,612 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528837967] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:25:26,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1409134353] [2021-06-06 00:25:26,612 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 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 [2021-06-06 00:25:26,637 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:25:26,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:25:26,638 WARN L261 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-06 00:25:26,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:25:27,319 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:25:27,319 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1409134353] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:25:27,319 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:25:27,319 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19] total 35 [2021-06-06 00:25:27,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990956693] [2021-06-06 00:25:27,319 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-06 00:25:27,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:25:27,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-06 00:25:27,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1143, Unknown=0, NotChecked=0, Total=1260 [2021-06-06 00:25:27,320 INFO L87 Difference]: Start difference. First operand 5492 states and 12823 transitions. Second operand has 36 states, 36 states have (on average 1.9166666666666667) internal successors, (69), 35 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) [2021-06-06 00:25:30,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:25:30,471 INFO L93 Difference]: Finished difference Result 5816 states and 13464 transitions. [2021-06-06 00:25:30,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-06-06 00:25:30,472 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9166666666666667) internal successors, (69), 35 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 37 [2021-06-06 00:25:30,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:25:30,477 INFO L225 Difference]: With dead ends: 5816 [2021-06-06 00:25:30,477 INFO L226 Difference]: Without dead ends: 5798 [2021-06-06 00:25:30,478 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2285 ImplicationChecksByTransitivity, 2934.7ms TimeCoverageRelationStatistics Valid=700, Invalid=7132, Unknown=0, NotChecked=0, Total=7832 [2021-06-06 00:25:30,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5798 states. [2021-06-06 00:25:30,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5798 to 5502. [2021-06-06 00:25:30,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5502 states, 5501 states have (on average 2.335393564806399) internal successors, (12847), 5501 states have internal predecessors, (12847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:25:30,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5502 states to 5502 states and 12847 transitions. [2021-06-06 00:25:30,534 INFO L78 Accepts]: Start accepts. Automaton has 5502 states and 12847 transitions. Word has length 37 [2021-06-06 00:25:30,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:25:30,534 INFO L482 AbstractCegarLoop]: Abstraction has 5502 states and 12847 transitions. [2021-06-06 00:25:30,534 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.9166666666666667) internal successors, (69), 35 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) [2021-06-06 00:25:30,534 INFO L276 IsEmpty]: Start isEmpty. Operand 5502 states and 12847 transitions. [2021-06-06 00:25:30,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-06 00:25:30,541 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:25:30,541 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:25:30,766 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 117 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1808 [2021-06-06 00:25:30,766 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:25:30,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:25:30,766 INFO L82 PathProgramCache]: Analyzing trace with hash -1242179773, now seen corresponding path program 117 times [2021-06-06 00:25:30,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:25:30,767 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550489425] [2021-06-06 00:25:30,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:25:30,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:25:30,993 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:25:30,993 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:25:30,993 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550489425] [2021-06-06 00:25:30,993 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550489425] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:25:30,993 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492609285] [2021-06-06 00:25:30,993 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 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 [2021-06-06 00:25:31,020 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-06 00:25:31,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:25:31,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-06 00:25:31,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:25:31,567 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 4 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:25:31,567 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1492609285] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:25:31,567 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:25:31,567 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 34 [2021-06-06 00:25:31,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532874923] [2021-06-06 00:25:31,567 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-06 00:25:31,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:25:31,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-06 00:25:31,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=1096, Unknown=0, NotChecked=0, Total=1190 [2021-06-06 00:25:31,568 INFO L87 Difference]: Start difference. First operand 5502 states and 12847 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) [2021-06-06 00:25:44,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:25:44,089 INFO L93 Difference]: Finished difference Result 7773 states and 17514 transitions. [2021-06-06 00:25:44,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 221 states. [2021-06-06 00:25:44,089 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 37 [2021-06-06 00:25:44,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:25:44,096 INFO L225 Difference]: With dead ends: 7773 [2021-06-06 00:25:44,096 INFO L226 Difference]: Without dead ends: 7761 [2021-06-06 00:25:44,098 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 235 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22159 ImplicationChecksByTransitivity, 11003.1ms TimeCoverageRelationStatistics Valid=4256, Invalid=51676, Unknown=0, NotChecked=0, Total=55932 [2021-06-06 00:25:44,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7761 states. [2021-06-06 00:25:44,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7761 to 5514. [2021-06-06 00:25:44,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5514 states, 5513 states have (on average 2.3359332486849267) internal successors, (12878), 5513 states have internal predecessors, (12878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:25:44,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5514 states to 5514 states and 12878 transitions. [2021-06-06 00:25:44,164 INFO L78 Accepts]: Start accepts. Automaton has 5514 states and 12878 transitions. Word has length 37 [2021-06-06 00:25:44,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:25:44,165 INFO L482 AbstractCegarLoop]: Abstraction has 5514 states and 12878 transitions. [2021-06-06 00:25:44,165 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) [2021-06-06 00:25:44,165 INFO L276 IsEmpty]: Start isEmpty. Operand 5514 states and 12878 transitions. [2021-06-06 00:25:44,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-06 00:25:44,169 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:25:44,169 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:25:44,370 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1823,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:25:44,370 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:25:44,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:25:44,370 INFO L82 PathProgramCache]: Analyzing trace with hash -592110803, now seen corresponding path program 118 times [2021-06-06 00:25:44,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:25:44,370 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109018766] [2021-06-06 00:25:44,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:25:44,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:25:44,595 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:25:44,596 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:25:44,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109018766] [2021-06-06 00:25:44,596 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1109018766] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:25:44,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1710421021] [2021-06-06 00:25:44,596 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 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 [2021-06-06 00:25:44,621 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:25:44,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:25:44,622 WARN L261 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-06 00:25:44,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:25:45,329 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:25:45,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1710421021] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:25:45,329 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:25:45,329 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19] total 35 [2021-06-06 00:25:45,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969938219] [2021-06-06 00:25:45,329 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-06 00:25:45,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:25:45,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-06 00:25:45,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1138, Unknown=0, NotChecked=0, Total=1260 [2021-06-06 00:25:45,330 INFO L87 Difference]: Start difference. First operand 5514 states and 12878 transitions. Second operand has 36 states, 36 states have (on average 1.8611111111111112) internal successors, (67), 35 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) [2021-06-06 00:25:48,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:25:48,067 INFO L93 Difference]: Finished difference Result 5766 states and 13384 transitions. [2021-06-06 00:25:48,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-06 00:25:48,068 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.8611111111111112) internal successors, (67), 35 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 37 [2021-06-06 00:25:48,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:25:48,073 INFO L225 Difference]: With dead ends: 5766 [2021-06-06 00:25:48,073 INFO L226 Difference]: Without dead ends: 5766 [2021-06-06 00:25:48,073 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1341 ImplicationChecksByTransitivity, 2695.9ms TimeCoverageRelationStatistics Valid=572, Invalid=4978, Unknown=0, NotChecked=0, Total=5550 [2021-06-06 00:25:48,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5766 states. [2021-06-06 00:25:48,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5766 to 5511. [2021-06-06 00:25:48,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5511 states, 5510 states have (on average 2.3364791288566242) internal successors, (12874), 5510 states have internal predecessors, (12874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:25:48,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5511 states to 5511 states and 12874 transitions. [2021-06-06 00:25:48,128 INFO L78 Accepts]: Start accepts. Automaton has 5511 states and 12874 transitions. Word has length 37 [2021-06-06 00:25:48,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:25:48,128 INFO L482 AbstractCegarLoop]: Abstraction has 5511 states and 12874 transitions. [2021-06-06 00:25:48,128 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.8611111111111112) internal successors, (67), 35 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) [2021-06-06 00:25:48,128 INFO L276 IsEmpty]: Start isEmpty. Operand 5511 states and 12874 transitions. [2021-06-06 00:25:48,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-06 00:25:48,133 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:25:48,133 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:25:48,333 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1847 [2021-06-06 00:25:48,333 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:25:48,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:25:48,334 INFO L82 PathProgramCache]: Analyzing trace with hash 1231736695, now seen corresponding path program 119 times [2021-06-06 00:25:48,334 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:25:48,334 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443009125] [2021-06-06 00:25:48,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:25:48,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:25:48,571 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:25:48,572 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:25:48,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443009125] [2021-06-06 00:25:48,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443009125] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:25:48,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [630046219] [2021-06-06 00:25:48,572 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 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 [2021-06-06 00:25:48,600 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-06 00:25:48,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:25:48,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-06 00:25:48,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:25:49,355 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:25:49,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [630046219] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:25:49,355 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:25:49,355 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-06 00:25:49,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478888633] [2021-06-06 00:25:49,355 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-06 00:25:49,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:25:49,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-06 00:25:49,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=1241, Unknown=0, NotChecked=0, Total=1332 [2021-06-06 00:25:49,356 INFO L87 Difference]: Start difference. First operand 5511 states and 12874 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) [2021-06-06 00:25:53,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:25:53,826 INFO L93 Difference]: Finished difference Result 6342 states and 14521 transitions. [2021-06-06 00:25:53,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-06-06 00:25:53,826 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 37 [2021-06-06 00:25:53,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:25:53,832 INFO L225 Difference]: With dead ends: 6342 [2021-06-06 00:25:53,832 INFO L226 Difference]: Without dead ends: 6285 [2021-06-06 00:25:53,833 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3248 ImplicationChecksByTransitivity, 4039.4ms TimeCoverageRelationStatistics Valid=895, Invalid=10877, Unknown=0, NotChecked=0, Total=11772 [2021-06-06 00:25:53,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6285 states. [2021-06-06 00:25:53,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6285 to 5541. [2021-06-06 00:25:53,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5541 states, 5540 states have (on average 2.334657039711191) internal successors, (12934), 5540 states have internal predecessors, (12934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:25:53,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5541 states to 5541 states and 12934 transitions. [2021-06-06 00:25:53,895 INFO L78 Accepts]: Start accepts. Automaton has 5541 states and 12934 transitions. Word has length 37 [2021-06-06 00:25:53,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:25:53,895 INFO L482 AbstractCegarLoop]: Abstraction has 5541 states and 12934 transitions. [2021-06-06 00:25:53,895 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) [2021-06-06 00:25:53,895 INFO L276 IsEmpty]: Start isEmpty. Operand 5541 states and 12934 transitions. [2021-06-06 00:25:53,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-06 00:25:53,901 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:25:53,901 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:25:54,101 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1861 [2021-06-06 00:25:54,101 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:25:54,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:25:54,101 INFO L82 PathProgramCache]: Analyzing trace with hash 1935418623, now seen corresponding path program 120 times [2021-06-06 00:25:54,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:25:54,102 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864429615] [2021-06-06 00:25:54,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:25:54,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:25:54,376 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:25:54,376 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:25:54,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864429615] [2021-06-06 00:25:54,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864429615] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:25:54,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1592658517] [2021-06-06 00:25:54,376 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 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 [2021-06-06 00:25:54,403 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-06 00:25:54,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:25:54,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-06 00:25:54,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:25:54,929 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 4 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:25:54,929 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1592658517] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:25:54,929 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:25:54,929 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 35 [2021-06-06 00:25:54,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146736804] [2021-06-06 00:25:54,929 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-06 00:25:54,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:25:54,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-06 00:25:54,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=1160, Unknown=0, NotChecked=0, Total=1260 [2021-06-06 00:25:54,930 INFO L87 Difference]: Start difference. First operand 5541 states and 12934 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) [2021-06-06 00:26:09,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:26:09,949 INFO L93 Difference]: Finished difference Result 8099 states and 18208 transitions. [2021-06-06 00:26:09,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 286 states. [2021-06-06 00:26:09,949 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 37 [2021-06-06 00:26:09,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:26:09,956 INFO L225 Difference]: With dead ends: 8099 [2021-06-06 00:26:09,956 INFO L226 Difference]: Without dead ends: 8087 [2021-06-06 00:26:09,959 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 300 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37586 ImplicationChecksByTransitivity, 13374.9ms TimeCoverageRelationStatistics Valid=6402, Invalid=84500, Unknown=0, NotChecked=0, Total=90902 [2021-06-06 00:26:09,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8087 states. [2021-06-06 00:26:10,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8087 to 5547. [2021-06-06 00:26:10,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5547 states, 5546 states have (on average 2.3348359177785794) internal successors, (12949), 5546 states have internal predecessors, (12949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:10,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5547 states to 5547 states and 12949 transitions. [2021-06-06 00:26:10,023 INFO L78 Accepts]: Start accepts. Automaton has 5547 states and 12949 transitions. Word has length 37 [2021-06-06 00:26:10,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:26:10,023 INFO L482 AbstractCegarLoop]: Abstraction has 5547 states and 12949 transitions. [2021-06-06 00:26:10,023 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) [2021-06-06 00:26:10,023 INFO L276 IsEmpty]: Start isEmpty. Operand 5547 states and 12949 transitions. [2021-06-06 00:26:10,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-06 00:26:10,028 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:26:10,028 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:26:10,229 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1881 [2021-06-06 00:26:10,230 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:26:10,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:26:10,230 INFO L82 PathProgramCache]: Analyzing trace with hash -1709479703, now seen corresponding path program 121 times [2021-06-06 00:26:10,230 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:26:10,230 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671516975] [2021-06-06 00:26:10,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:26:10,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:26:10,507 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:26:10,507 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:26:10,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671516975] [2021-06-06 00:26:10,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671516975] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:26:10,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [675978770] [2021-06-06 00:26:10,507 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 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 [2021-06-06 00:26:10,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:26:10,533 WARN L261 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-06 00:26:10,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:26:11,269 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 5 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:26:11,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [675978770] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:26:11,270 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:26:11,270 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 35 [2021-06-06 00:26:11,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476225194] [2021-06-06 00:26:11,270 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-06 00:26:11,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:26:11,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-06 00:26:11,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1143, Unknown=0, NotChecked=0, Total=1260 [2021-06-06 00:26:11,271 INFO L87 Difference]: Start difference. First operand 5547 states and 12949 transitions. Second operand has 36 states, 36 states have (on average 1.8611111111111112) internal successors, (67), 35 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) [2021-06-06 00:26:14,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:26:14,810 INFO L93 Difference]: Finished difference Result 6293 states and 14448 transitions. [2021-06-06 00:26:14,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-06-06 00:26:14,810 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.8611111111111112) internal successors, (67), 35 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 37 [2021-06-06 00:26:14,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:26:14,816 INFO L225 Difference]: With dead ends: 6293 [2021-06-06 00:26:14,816 INFO L226 Difference]: Without dead ends: 6284 [2021-06-06 00:26:14,817 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2326 ImplicationChecksByTransitivity, 3179.6ms TimeCoverageRelationStatistics Valid=749, Invalid=7623, Unknown=0, NotChecked=0, Total=8372 [2021-06-06 00:26:14,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6284 states. [2021-06-06 00:26:14,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6284 to 5583. [2021-06-06 00:26:14,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5583 states, 5582 states have (on average 2.3350053744177712) internal successors, (13034), 5582 states have internal predecessors, (13034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:14,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5583 states to 5583 states and 13034 transitions. [2021-06-06 00:26:14,887 INFO L78 Accepts]: Start accepts. Automaton has 5583 states and 13034 transitions. Word has length 37 [2021-06-06 00:26:14,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:26:14,888 INFO L482 AbstractCegarLoop]: Abstraction has 5583 states and 13034 transitions. [2021-06-06 00:26:14,888 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.8611111111111112) internal successors, (67), 35 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) [2021-06-06 00:26:14,888 INFO L276 IsEmpty]: Start isEmpty. Operand 5583 states and 13034 transitions. [2021-06-06 00:26:14,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-06 00:26:14,893 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:26:14,893 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:26:15,093 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1910 [2021-06-06 00:26:15,093 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:26:15,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:26:15,094 INFO L82 PathProgramCache]: Analyzing trace with hash 956173311, now seen corresponding path program 122 times [2021-06-06 00:26:15,094 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:26:15,094 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628510560] [2021-06-06 00:26:15,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:26:15,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:26:15,339 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:26:15,340 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:26:15,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628510560] [2021-06-06 00:26:15,340 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628510560] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:26:15,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180009514] [2021-06-06 00:26:15,340 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 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 [2021-06-06 00:26:15,365 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:26:15,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:26:15,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-06 00:26:15,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:26:15,925 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:26:15,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [180009514] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:26:15,925 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:26:15,925 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 31 [2021-06-06 00:26:15,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587625169] [2021-06-06 00:26:15,925 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-06 00:26:15,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:26:15,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-06 00:26:15,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=839, Unknown=0, NotChecked=0, Total=992 [2021-06-06 00:26:15,926 INFO L87 Difference]: Start difference. First operand 5583 states and 13034 transitions. Second operand has 32 states, 32 states have (on average 2.09375) internal successors, (67), 31 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) [2021-06-06 00:26:16,863 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 32 [2021-06-06 00:26:19,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:26:19,700 INFO L93 Difference]: Finished difference Result 7671 states and 17703 transitions. [2021-06-06 00:26:19,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-06 00:26:19,701 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.09375) internal successors, (67), 31 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 37 [2021-06-06 00:26:19,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:26:19,707 INFO L225 Difference]: With dead ends: 7671 [2021-06-06 00:26:19,707 INFO L226 Difference]: Without dead ends: 7636 [2021-06-06 00:26:19,708 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2881 ImplicationChecksByTransitivity, 3562.4ms TimeCoverageRelationStatistics Valid=1319, Invalid=6871, Unknown=0, NotChecked=0, Total=8190 [2021-06-06 00:26:19,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7636 states. [2021-06-06 00:26:19,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7636 to 5598. [2021-06-06 00:26:19,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5598 states, 5597 states have (on average 2.3353582276219402) internal successors, (13071), 5597 states have internal predecessors, (13071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:19,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5598 states to 5598 states and 13071 transitions. [2021-06-06 00:26:19,768 INFO L78 Accepts]: Start accepts. Automaton has 5598 states and 13071 transitions. Word has length 37 [2021-06-06 00:26:19,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:26:19,768 INFO L482 AbstractCegarLoop]: Abstraction has 5598 states and 13071 transitions. [2021-06-06 00:26:19,768 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.09375) internal successors, (67), 31 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) [2021-06-06 00:26:19,768 INFO L276 IsEmpty]: Start isEmpty. Operand 5598 states and 13071 transitions. [2021-06-06 00:26:19,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-06 00:26:19,772 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:26:19,772 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:26:19,972 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1928,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:26:19,973 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:26:19,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:26:19,973 INFO L82 PathProgramCache]: Analyzing trace with hash -1447643043, now seen corresponding path program 123 times [2021-06-06 00:26:19,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:26:19,973 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502500809] [2021-06-06 00:26:19,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:26:19,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:26:20,170 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 11 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:26:20,170 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:26:20,170 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502500809] [2021-06-06 00:26:20,170 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502500809] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:26:20,170 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [639927143] [2021-06-06 00:26:20,170 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 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 [2021-06-06 00:26:20,198 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-06-06 00:26:20,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:26:20,199 WARN L261 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-06 00:26:20,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:26:20,619 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 9 proven. 50 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-06 00:26:20,619 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [639927143] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:26:20,619 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:26:20,619 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 29 [2021-06-06 00:26:20,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715351748] [2021-06-06 00:26:20,620 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-06 00:26:20,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:26:20,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-06 00:26:20,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=705, Unknown=0, NotChecked=0, Total=870 [2021-06-06 00:26:20,620 INFO L87 Difference]: Start difference. First operand 5598 states and 13071 transitions. Second operand has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:21,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:26:21,250 INFO L93 Difference]: Finished difference Result 6845 states and 15895 transitions. [2021-06-06 00:26:21,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-06 00:26:21,250 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-06 00:26:21,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:26:21,257 INFO L225 Difference]: With dead ends: 6845 [2021-06-06 00:26:21,257 INFO L226 Difference]: Without dead ends: 6841 [2021-06-06 00:26:21,257 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 673 ImplicationChecksByTransitivity, 813.6ms TimeCoverageRelationStatistics Valid=406, Invalid=1664, Unknown=0, NotChecked=0, Total=2070 [2021-06-06 00:26:21,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6841 states. [2021-06-06 00:26:21,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6841 to 5631. [2021-06-06 00:26:21,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5631 states, 5630 states have (on average 2.3408525754884546) internal successors, (13179), 5630 states have internal predecessors, (13179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:21,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5631 states to 5631 states and 13179 transitions. [2021-06-06 00:26:21,334 INFO L78 Accepts]: Start accepts. Automaton has 5631 states and 13179 transitions. Word has length 37 [2021-06-06 00:26:21,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:26:21,334 INFO L482 AbstractCegarLoop]: Abstraction has 5631 states and 13179 transitions. [2021-06-06 00:26:21,334 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:21,334 INFO L276 IsEmpty]: Start isEmpty. Operand 5631 states and 13179 transitions. [2021-06-06 00:26:21,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-06 00:26:21,338 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:26:21,338 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:26:21,539 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1950 [2021-06-06 00:26:21,539 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:26:21,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:26:21,539 INFO L82 PathProgramCache]: Analyzing trace with hash 2142478777, now seen corresponding path program 124 times [2021-06-06 00:26:21,540 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:26:21,540 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498682053] [2021-06-06 00:26:21,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:26:21,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:26:21,791 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:26:21,791 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:26:21,791 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498682053] [2021-06-06 00:26:21,791 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498682053] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:26:21,791 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [652733910] [2021-06-06 00:26:21,791 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 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 [2021-06-06 00:26:21,818 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:26:21,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:26:21,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-06 00:26:21,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:26:22,373 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:26:22,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [652733910] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:26:22,374 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:26:22,374 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 17] total 32 [2021-06-06 00:26:22,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385498691] [2021-06-06 00:26:22,374 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-06 00:26:22,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:26:22,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-06 00:26:22,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=923, Unknown=0, NotChecked=0, Total=1056 [2021-06-06 00:26:22,374 INFO L87 Difference]: Start difference. First operand 5631 states and 13179 transitions. Second operand has 33 states, 33 states have (on average 2.0303030303030303) internal successors, (67), 32 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) [2021-06-06 00:26:26,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:26:26,046 INFO L93 Difference]: Finished difference Result 8549 states and 19665 transitions. [2021-06-06 00:26:26,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-06 00:26:26,046 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0303030303030303) internal successors, (67), 32 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 37 [2021-06-06 00:26:26,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:26:26,053 INFO L225 Difference]: With dead ends: 8549 [2021-06-06 00:26:26,053 INFO L226 Difference]: Without dead ends: 8498 [2021-06-06 00:26:26,053 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2073 ImplicationChecksByTransitivity, 3417.4ms TimeCoverageRelationStatistics Valid=959, Invalid=5683, Unknown=0, NotChecked=0, Total=6642 [2021-06-06 00:26:26,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8498 states. [2021-06-06 00:26:26,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8498 to 5868. [2021-06-06 00:26:26,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5868 states, 5867 states have (on average 2.3441281745355376) internal successors, (13753), 5867 states have internal predecessors, (13753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:26,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5868 states to 5868 states and 13753 transitions. [2021-06-06 00:26:26,122 INFO L78 Accepts]: Start accepts. Automaton has 5868 states and 13753 transitions. Word has length 37 [2021-06-06 00:26:26,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:26:26,122 INFO L482 AbstractCegarLoop]: Abstraction has 5868 states and 13753 transitions. [2021-06-06 00:26:26,122 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.0303030303030303) internal successors, (67), 32 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) [2021-06-06 00:26:26,122 INFO L276 IsEmpty]: Start isEmpty. Operand 5868 states and 13753 transitions. [2021-06-06 00:26:26,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-06 00:26:26,126 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:26:26,127 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:26:26,327 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1967,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:26:26,327 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:26:26,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:26:26,327 INFO L82 PathProgramCache]: Analyzing trace with hash 1847263995, now seen corresponding path program 125 times [2021-06-06 00:26:26,327 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:26:26,328 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442912379] [2021-06-06 00:26:26,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:26:26,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:26:26,649 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:26:26,650 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:26:26,650 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442912379] [2021-06-06 00:26:26,650 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442912379] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:26:26,650 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1920017962] [2021-06-06 00:26:26,650 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 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 [2021-06-06 00:26:26,677 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-06 00:26:26,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:26:26,678 WARN L261 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-06 00:26:26,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:26:27,451 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:26:27,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1920017962] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:26:27,451 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:26:27,451 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2021-06-06 00:26:27,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269419427] [2021-06-06 00:26:27,451 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-06 00:26:27,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:26:27,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-06 00:26:27,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=1211, Unknown=0, NotChecked=0, Total=1332 [2021-06-06 00:26:27,452 INFO L87 Difference]: Start difference. First operand 5868 states and 13753 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) [2021-06-06 00:26:29,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:26:29,554 INFO L93 Difference]: Finished difference Result 6341 states and 14705 transitions. [2021-06-06 00:26:29,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-06 00:26:29,555 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 37 [2021-06-06 00:26:29,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:26:29,561 INFO L225 Difference]: With dead ends: 6341 [2021-06-06 00:26:29,561 INFO L226 Difference]: Without dead ends: 6287 [2021-06-06 00:26:29,561 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1402 ImplicationChecksByTransitivity, 2389.0ms TimeCoverageRelationStatistics Valid=431, Invalid=4971, Unknown=0, NotChecked=0, Total=5402 [2021-06-06 00:26:29,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6287 states. [2021-06-06 00:26:29,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6287 to 6016. [2021-06-06 00:26:29,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6016 states, 6015 states have (on average 2.342975893599335) internal successors, (14093), 6015 states have internal predecessors, (14093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:29,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6016 states to 6016 states and 14093 transitions. [2021-06-06 00:26:29,622 INFO L78 Accepts]: Start accepts. Automaton has 6016 states and 14093 transitions. Word has length 37 [2021-06-06 00:26:29,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:26:29,622 INFO L482 AbstractCegarLoop]: Abstraction has 6016 states and 14093 transitions. [2021-06-06 00:26:29,622 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) [2021-06-06 00:26:29,622 INFO L276 IsEmpty]: Start isEmpty. Operand 6016 states and 14093 transitions. [2021-06-06 00:26:29,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-06 00:26:29,627 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:26:29,627 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:26:29,828 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1989 [2021-06-06 00:26:29,829 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:26:29,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:26:29,829 INFO L82 PathProgramCache]: Analyzing trace with hash -321497981, now seen corresponding path program 126 times [2021-06-06 00:26:29,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:26:29,829 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108554697] [2021-06-06 00:26:29,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:26:29,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:26:30,172 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:26:30,172 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:26:30,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108554697] [2021-06-06 00:26:30,172 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108554697] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:26:30,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [713742509] [2021-06-06 00:26:30,173 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 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 [2021-06-06 00:26:30,200 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-06 00:26:30,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:26:30,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-06 00:26:30,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:26:30,937 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:26:30,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [713742509] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:26:30,937 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:26:30,937 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-06 00:26:30,937 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735421513] [2021-06-06 00:26:30,937 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-06 00:26:30,937 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:26:30,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-06 00:26:30,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=1244, Unknown=0, NotChecked=0, Total=1332 [2021-06-06 00:26:30,938 INFO L87 Difference]: Start difference. First operand 6016 states and 14093 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) [2021-06-06 00:26:35,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:26:35,442 INFO L93 Difference]: Finished difference Result 6444 states and 14954 transitions. [2021-06-06 00:26:35,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-06-06 00:26:35,443 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 37 [2021-06-06 00:26:35,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:26:35,449 INFO L225 Difference]: With dead ends: 6444 [2021-06-06 00:26:35,449 INFO L226 Difference]: Without dead ends: 6408 [2021-06-06 00:26:35,450 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2669 ImplicationChecksByTransitivity, 4355.2ms TimeCoverageRelationStatistics Valid=738, Invalid=9564, Unknown=0, NotChecked=0, Total=10302 [2021-06-06 00:26:35,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6408 states. [2021-06-06 00:26:35,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6408 to 6108. [2021-06-06 00:26:35,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6108 states, 6107 states have (on average 2.3430489602095954) internal successors, (14309), 6107 states have internal predecessors, (14309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:35,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6108 states to 6108 states and 14309 transitions. [2021-06-06 00:26:35,517 INFO L78 Accepts]: Start accepts. Automaton has 6108 states and 14309 transitions. Word has length 37 [2021-06-06 00:26:35,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:26:35,517 INFO L482 AbstractCegarLoop]: Abstraction has 6108 states and 14309 transitions. [2021-06-06 00:26:35,517 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) [2021-06-06 00:26:35,517 INFO L276 IsEmpty]: Start isEmpty. Operand 6108 states and 14309 transitions. [2021-06-06 00:26:35,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-06 00:26:35,522 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:26:35,522 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:26:35,724 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2002 [2021-06-06 00:26:35,725 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:26:35,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:26:35,725 INFO L82 PathProgramCache]: Analyzing trace with hash 510926535, now seen corresponding path program 127 times [2021-06-06 00:26:35,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:26:35,725 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613698053] [2021-06-06 00:26:35,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:26:35,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:26:36,042 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:26:36,042 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:26:36,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613698053] [2021-06-06 00:26:36,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613698053] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:26:36,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712346273] [2021-06-06 00:26:36,043 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 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 [2021-06-06 00:26:36,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:26:36,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-06 00:26:36,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:26:36,815 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:26:36,816 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1712346273] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:26:36,816 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:26:36,816 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-06 00:26:36,816 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963956195] [2021-06-06 00:26:36,816 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-06 00:26:36,816 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:26:36,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-06 00:26:36,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=1242, Unknown=0, NotChecked=0, Total=1332 [2021-06-06 00:26:36,817 INFO L87 Difference]: Start difference. First operand 6108 states and 14309 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) [2021-06-06 00:26:41,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:26:41,721 INFO L93 Difference]: Finished difference Result 6490 states and 15036 transitions. [2021-06-06 00:26:41,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-06-06 00:26:41,722 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 37 [2021-06-06 00:26:41,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:26:41,728 INFO L225 Difference]: With dead ends: 6490 [2021-06-06 00:26:41,728 INFO L226 Difference]: Without dead ends: 6421 [2021-06-06 00:26:41,729 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3060 ImplicationChecksByTransitivity, 4633.1ms TimeCoverageRelationStatistics Valid=882, Invalid=10460, Unknown=0, NotChecked=0, Total=11342 [2021-06-06 00:26:41,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6421 states. [2021-06-06 00:26:41,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6421 to 6086. [2021-06-06 00:26:41,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6086 states, 6085 states have (on average 2.341988496302383) internal successors, (14251), 6085 states have internal predecessors, (14251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:41,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6086 states to 6086 states and 14251 transitions. [2021-06-06 00:26:41,795 INFO L78 Accepts]: Start accepts. Automaton has 6086 states and 14251 transitions. Word has length 37 [2021-06-06 00:26:41,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:26:41,795 INFO L482 AbstractCegarLoop]: Abstraction has 6086 states and 14251 transitions. [2021-06-06 00:26:41,795 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) [2021-06-06 00:26:41,795 INFO L276 IsEmpty]: Start isEmpty. Operand 6086 states and 14251 transitions. [2021-06-06 00:26:41,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-06 00:26:41,801 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:26:41,801 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:26:42,001 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2021,128 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:26:42,002 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:26:42,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:26:42,002 INFO L82 PathProgramCache]: Analyzing trace with hash -1467229701, now seen corresponding path program 128 times [2021-06-06 00:26:42,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:26:42,002 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638924599] [2021-06-06 00:26:42,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:26:42,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:26:42,287 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:26:42,287 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:26:42,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638924599] [2021-06-06 00:26:42,288 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1638924599] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:26:42,288 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [792318834] [2021-06-06 00:26:42,288 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 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 [2021-06-06 00:26:42,318 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:26:42,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:26:42,319 WARN L261 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-06 00:26:42,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:26:43,114 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:26:43,115 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [792318834] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:26:43,115 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:26:43,115 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2021-06-06 00:26:43,115 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952917246] [2021-06-06 00:26:43,115 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-06 00:26:43,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:26:43,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-06 00:26:43,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1213, Unknown=0, NotChecked=0, Total=1332 [2021-06-06 00:26:43,116 INFO L87 Difference]: Start difference. First operand 6086 states and 14251 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) [2021-06-06 00:26:46,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:26:46,381 INFO L93 Difference]: Finished difference Result 6707 states and 15582 transitions. [2021-06-06 00:26:46,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-06-06 00:26:46,382 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 37 [2021-06-06 00:26:46,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:26:46,387 INFO L225 Difference]: With dead ends: 6707 [2021-06-06 00:26:46,387 INFO L226 Difference]: Without dead ends: 6707 [2021-06-06 00:26:46,388 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2481 ImplicationChecksByTransitivity, 3186.8ms TimeCoverageRelationStatistics Valid=745, Invalid=7627, Unknown=0, NotChecked=0, Total=8372 [2021-06-06 00:26:46,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6707 states. [2021-06-06 00:26:46,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6707 to 6194. [2021-06-06 00:26:46,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6194 states, 6193 states have (on average 2.3437752300984984) internal successors, (14515), 6193 states have internal predecessors, (14515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:46,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6194 states to 6194 states and 14515 transitions. [2021-06-06 00:26:46,451 INFO L78 Accepts]: Start accepts. Automaton has 6194 states and 14515 transitions. Word has length 37 [2021-06-06 00:26:46,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:26:46,451 INFO L482 AbstractCegarLoop]: Abstraction has 6194 states and 14515 transitions. [2021-06-06 00:26:46,451 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) [2021-06-06 00:26:46,451 INFO L276 IsEmpty]: Start isEmpty. Operand 6194 states and 14515 transitions. [2021-06-06 00:26:46,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-06 00:26:46,456 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:26:46,456 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:26:46,656 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2048 [2021-06-06 00:26:46,656 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:26:46,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:26:46,657 INFO L82 PathProgramCache]: Analyzing trace with hash -371186881, now seen corresponding path program 129 times [2021-06-06 00:26:46,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:26:46,657 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299196188] [2021-06-06 00:26:46,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:26:46,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:26:46,940 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:26:46,940 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:26:46,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299196188] [2021-06-06 00:26:46,940 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299196188] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:26:46,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1681057272] [2021-06-06 00:26:46,940 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 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 [2021-06-06 00:26:46,966 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-06 00:26:46,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:26:46,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-06 00:26:46,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:26:47,632 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 2 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:26:47,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1681057272] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:26:47,633 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:26:47,633 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-06 00:26:47,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993642054] [2021-06-06 00:26:47,633 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-06 00:26:47,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:26:47,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-06 00:26:47,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=1238, Unknown=0, NotChecked=0, Total=1332 [2021-06-06 00:26:47,633 INFO L87 Difference]: Start difference. First operand 6194 states and 14515 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) [2021-06-06 00:26:51,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:26:51,723 INFO L93 Difference]: Finished difference Result 6899 states and 15927 transitions. [2021-06-06 00:26:51,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-06-06 00:26:51,724 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 37 [2021-06-06 00:26:51,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:26:51,730 INFO L225 Difference]: With dead ends: 6899 [2021-06-06 00:26:51,730 INFO L226 Difference]: Without dead ends: 6848 [2021-06-06 00:26:51,731 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2881 ImplicationChecksByTransitivity, 3793.9ms TimeCoverageRelationStatistics Valid=676, Invalid=9626, Unknown=0, NotChecked=0, Total=10302 [2021-06-06 00:26:51,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6848 states. [2021-06-06 00:26:51,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6848 to 6222. [2021-06-06 00:26:51,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6222 states, 6221 states have (on average 2.344639125542517) internal successors, (14586), 6221 states have internal predecessors, (14586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:51,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6222 states to 6222 states and 14586 transitions. [2021-06-06 00:26:51,794 INFO L78 Accepts]: Start accepts. Automaton has 6222 states and 14586 transitions. Word has length 37 [2021-06-06 00:26:51,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:26:51,794 INFO L482 AbstractCegarLoop]: Abstraction has 6222 states and 14586 transitions. [2021-06-06 00:26:51,794 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) [2021-06-06 00:26:51,794 INFO L276 IsEmpty]: Start isEmpty. Operand 6222 states and 14586 transitions. [2021-06-06 00:26:51,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-06 00:26:51,799 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:26:51,799 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:26:52,007 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2070 [2021-06-06 00:26:52,007 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:26:52,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:26:52,007 INFO L82 PathProgramCache]: Analyzing trace with hash 461237635, now seen corresponding path program 130 times [2021-06-06 00:26:52,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:26:52,007 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968651088] [2021-06-06 00:26:52,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:26:52,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:26:52,298 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:26:52,299 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:26:52,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968651088] [2021-06-06 00:26:52,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968651088] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:26:52,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [687894668] [2021-06-06 00:26:52,299 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 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 [2021-06-06 00:26:52,324 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:26:52,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:26:52,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-06 00:26:52,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:26:53,066 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:26:53,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [687894668] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:26:53,066 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:26:53,066 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-06 00:26:53,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474674870] [2021-06-06 00:26:53,067 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-06 00:26:53,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:26:53,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-06 00:26:53,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=1241, Unknown=0, NotChecked=0, Total=1332 [2021-06-06 00:26:53,067 INFO L87 Difference]: Start difference. First operand 6222 states and 14586 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) [2021-06-06 00:26:58,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:26:58,930 INFO L93 Difference]: Finished difference Result 6675 states and 15477 transitions. [2021-06-06 00:26:58,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2021-06-06 00:26:58,930 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 37 [2021-06-06 00:26:58,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:26:58,937 INFO L225 Difference]: With dead ends: 6675 [2021-06-06 00:26:58,937 INFO L226 Difference]: Without dead ends: 6603 [2021-06-06 00:26:58,938 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4586 ImplicationChecksByTransitivity, 5474.3ms TimeCoverageRelationStatistics Valid=1103, Invalid=14397, Unknown=0, NotChecked=0, Total=15500 [2021-06-06 00:26:58,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6603 states. [2021-06-06 00:26:58,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6603 to 6260. [2021-06-06 00:26:59,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6260 states, 6259 states have (on average 2.3447835117430897) internal successors, (14676), 6259 states have internal predecessors, (14676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:59,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6260 states to 6260 states and 14676 transitions. [2021-06-06 00:26:59,009 INFO L78 Accepts]: Start accepts. Automaton has 6260 states and 14676 transitions. Word has length 37 [2021-06-06 00:26:59,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:26:59,010 INFO L482 AbstractCegarLoop]: Abstraction has 6260 states and 14676 transitions. [2021-06-06 00:26:59,010 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) [2021-06-06 00:26:59,010 INFO L276 IsEmpty]: Start isEmpty. Operand 6260 states and 14676 transitions. [2021-06-06 00:26:59,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-06 00:26:59,015 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:26:59,015 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:26:59,216 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2096,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:26:59,216 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:26:59,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:26:59,216 INFO L82 PathProgramCache]: Analyzing trace with hash -1488555781, now seen corresponding path program 131 times [2021-06-06 00:26:59,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:26:59,216 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724422658] [2021-06-06 00:26:59,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:26:59,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:26:59,525 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:26:59,525 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:26:59,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724422658] [2021-06-06 00:26:59,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724422658] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:26:59,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [993754814] [2021-06-06 00:26:59,526 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 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 [2021-06-06 00:26:59,553 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-06 00:26:59,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:26:59,554 WARN L261 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-06 00:26:59,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:27:00,331 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:27:00,332 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [993754814] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:27:00,332 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:27:00,332 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20] total 37 [2021-06-06 00:27:00,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731290500] [2021-06-06 00:27:00,332 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-06 00:27:00,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:27:00,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-06 00:27:00,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1264, Unknown=0, NotChecked=0, Total=1406 [2021-06-06 00:27:00,333 INFO L87 Difference]: Start difference. First operand 6260 states and 14676 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) [2021-06-06 00:27:02,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:27:02,812 INFO L93 Difference]: Finished difference Result 6797 states and 15791 transitions. [2021-06-06 00:27:02,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-06 00:27:02,812 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 37 [2021-06-06 00:27:02,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:27:02,819 INFO L225 Difference]: With dead ends: 6797 [2021-06-06 00:27:02,819 INFO L226 Difference]: Without dead ends: 6755 [2021-06-06 00:27:02,819 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2041 ImplicationChecksByTransitivity, 2580.1ms TimeCoverageRelationStatistics Valid=725, Invalid=6415, Unknown=0, NotChecked=0, Total=7140 [2021-06-06 00:27:02,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6755 states. [2021-06-06 00:27:02,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6755 to 6340. [2021-06-06 00:27:02,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6340 states, 6339 states have (on average 2.3420097807225115) internal successors, (14846), 6339 states have internal predecessors, (14846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:27:02,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6340 states to 6340 states and 14846 transitions. [2021-06-06 00:27:02,891 INFO L78 Accepts]: Start accepts. Automaton has 6340 states and 14846 transitions. Word has length 37 [2021-06-06 00:27:02,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:27:02,891 INFO L482 AbstractCegarLoop]: Abstraction has 6340 states and 14846 transitions. [2021-06-06 00:27:02,891 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) [2021-06-06 00:27:02,891 INFO L276 IsEmpty]: Start isEmpty. Operand 6340 states and 14846 transitions. [2021-06-06 00:27:02,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-06 00:27:02,897 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:27:02,897 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:27:03,097 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2116 [2021-06-06 00:27:03,098 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:27:03,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:27:03,098 INFO L82 PathProgramCache]: Analyzing trace with hash -784873853, now seen corresponding path program 132 times [2021-06-06 00:27:03,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:27:03,098 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265049533] [2021-06-06 00:27:03,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:27:03,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:27:03,386 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:27:03,386 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:27:03,386 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265049533] [2021-06-06 00:27:03,386 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265049533] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:27:03,386 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [850909464] [2021-06-06 00:27:03,386 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 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 [2021-06-06 00:27:03,412 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-06 00:27:03,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:27:03,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-06 00:27:03,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:27:04,088 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:27:04,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [850909464] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:27:04,088 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:27:04,088 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-06 00:27:04,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247236784] [2021-06-06 00:27:04,088 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-06 00:27:04,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:27:04,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-06 00:27:04,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=1236, Unknown=0, NotChecked=0, Total=1332 [2021-06-06 00:27:04,089 INFO L87 Difference]: Start difference. First operand 6340 states and 14846 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) [2021-06-06 00:27:19,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:27:19,580 INFO L93 Difference]: Finished difference Result 8496 states and 19273 transitions. [2021-06-06 00:27:19,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 250 states. [2021-06-06 00:27:19,581 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 37 [2021-06-06 00:27:19,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:27:19,588 INFO L225 Difference]: With dead ends: 8496 [2021-06-06 00:27:19,589 INFO L226 Difference]: Without dead ends: 8484 [2021-06-06 00:27:19,592 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 268 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28541 ImplicationChecksByTransitivity, 14261.8ms TimeCoverageRelationStatistics Valid=5449, Invalid=67181, Unknown=0, NotChecked=0, Total=72630 [2021-06-06 00:27:19,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8484 states. [2021-06-06 00:27:19,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8484 to 6370. [2021-06-06 00:27:19,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6370 states, 6369 states have (on average 2.342282932956508) internal successors, (14918), 6369 states have internal predecessors, (14918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:27:19,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6370 states to 6370 states and 14918 transitions. [2021-06-06 00:27:19,695 INFO L78 Accepts]: Start accepts. Automaton has 6370 states and 14918 transitions. Word has length 37 [2021-06-06 00:27:19,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:27:19,695 INFO L482 AbstractCegarLoop]: Abstraction has 6370 states and 14918 transitions. [2021-06-06 00:27:19,695 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) [2021-06-06 00:27:19,695 INFO L276 IsEmpty]: Start isEmpty. Operand 6370 states and 14918 transitions. [2021-06-06 00:27:19,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-06 00:27:19,701 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:27:19,701 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:27:19,901 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2132,133 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:27:19,902 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:27:19,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:27:19,902 INFO L82 PathProgramCache]: Analyzing trace with hash -134804883, now seen corresponding path program 133 times [2021-06-06 00:27:19,902 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:27:19,902 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890995990] [2021-06-06 00:27:19,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:27:19,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:27:20,191 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:27:20,191 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:27:20,192 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890995990] [2021-06-06 00:27:20,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890995990] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:27:20,192 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [177520658] [2021-06-06 00:27:20,192 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 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 [2021-06-06 00:27:20,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:27:20,218 WARN L261 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-06 00:27:20,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:27:20,992 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 5 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:27:20,993 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [177520658] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:27:20,993 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:27:20,993 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 35 [2021-06-06 00:27:20,993 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057193142] [2021-06-06 00:27:20,993 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-06 00:27:20,993 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:27:20,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-06 00:27:20,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=1134, Unknown=0, NotChecked=0, Total=1260 [2021-06-06 00:27:20,993 INFO L87 Difference]: Start difference. First operand 6370 states and 14918 transitions. Second operand has 36 states, 36 states have (on average 1.8611111111111112) internal successors, (67), 35 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) [2021-06-06 00:27:23,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:27:23,585 INFO L93 Difference]: Finished difference Result 6909 states and 15987 transitions. [2021-06-06 00:27:23,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-06 00:27:23,585 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.8611111111111112) internal successors, (67), 35 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 37 [2021-06-06 00:27:23,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:27:23,592 INFO L225 Difference]: With dead ends: 6909 [2021-06-06 00:27:23,592 INFO L226 Difference]: Without dead ends: 6891 [2021-06-06 00:27:23,592 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1614 ImplicationChecksByTransitivity, 2423.3ms TimeCoverageRelationStatistics Valid=553, Invalid=5299, Unknown=0, NotChecked=0, Total=5852 [2021-06-06 00:27:23,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6891 states. [2021-06-06 00:27:23,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6891 to 6452. [2021-06-06 00:27:23,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6452 states, 6451 states have (on average 2.3432026042474035) internal successors, (15116), 6451 states have internal predecessors, (15116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:27:23,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6452 states to 6452 states and 15116 transitions. [2021-06-06 00:27:23,658 INFO L78 Accepts]: Start accepts. Automaton has 6452 states and 15116 transitions. Word has length 37 [2021-06-06 00:27:23,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:27:23,659 INFO L482 AbstractCegarLoop]: Abstraction has 6452 states and 15116 transitions. [2021-06-06 00:27:23,659 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.8611111111111112) internal successors, (67), 35 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) [2021-06-06 00:27:23,659 INFO L276 IsEmpty]: Start isEmpty. Operand 6452 states and 15116 transitions. [2021-06-06 00:27:23,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-06 00:27:23,664 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:27:23,664 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:27:23,864 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2167 [2021-06-06 00:27:23,864 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:27:23,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:27:23,865 INFO L82 PathProgramCache]: Analyzing trace with hash 1908066299, now seen corresponding path program 134 times [2021-06-06 00:27:23,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:27:23,865 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894526775] [2021-06-06 00:27:23,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:27:23,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:27:24,177 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:27:24,177 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:27:24,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894526775] [2021-06-06 00:27:24,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894526775] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:27:24,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [16450271] [2021-06-06 00:27:24,177 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 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 [2021-06-06 00:27:24,202 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:27:24,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:27:24,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-06 00:27:24,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:27:24,944 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:27:24,944 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [16450271] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:27:24,944 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:27:24,944 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 33 [2021-06-06 00:27:24,944 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510464515] [2021-06-06 00:27:24,944 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-06 00:27:24,944 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:27:24,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-06 00:27:24,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1004, Unknown=0, NotChecked=0, Total=1122 [2021-06-06 00:27:24,945 INFO L87 Difference]: Start difference. First operand 6452 states and 15116 transitions. Second operand has 34 states, 34 states have (on average 2.0294117647058822) internal successors, (69), 33 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) [2021-06-06 00:27:29,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:27:29,186 INFO L93 Difference]: Finished difference Result 8689 states and 20145 transitions. [2021-06-06 00:27:29,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-06-06 00:27:29,186 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.0294117647058822) internal successors, (69), 33 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 37 [2021-06-06 00:27:29,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:27:29,194 INFO L225 Difference]: With dead ends: 8689 [2021-06-06 00:27:29,195 INFO L226 Difference]: Without dead ends: 8655 [2021-06-06 00:27:29,195 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3911 ImplicationChecksByTransitivity, 4054.4ms TimeCoverageRelationStatistics Valid=1429, Invalid=10781, Unknown=0, NotChecked=0, Total=12210 [2021-06-06 00:27:29,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8655 states. [2021-06-06 00:27:29,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8655 to 6530. [2021-06-06 00:27:29,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6530 states, 6529 states have (on average 2.342165722162659) internal successors, (15292), 6529 states have internal predecessors, (15292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:27:29,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6530 states to 6530 states and 15292 transitions. [2021-06-06 00:27:29,271 INFO L78 Accepts]: Start accepts. Automaton has 6530 states and 15292 transitions. Word has length 37 [2021-06-06 00:27:29,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:27:29,271 INFO L482 AbstractCegarLoop]: Abstraction has 6530 states and 15292 transitions. [2021-06-06 00:27:29,271 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.0294117647058822) internal successors, (69), 33 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) [2021-06-06 00:27:29,271 INFO L276 IsEmpty]: Start isEmpty. Operand 6530 states and 15292 transitions. [2021-06-06 00:27:29,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-06 00:27:29,277 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:27:29,277 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:27:29,477 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2185,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:27:29,477 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:27:29,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:27:29,477 INFO L82 PathProgramCache]: Analyzing trace with hash -605365953, now seen corresponding path program 135 times [2021-06-06 00:27:29,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:27:29,478 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968698194] [2021-06-06 00:27:29,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:27:29,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:27:29,753 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:27:29,753 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:27:29,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968698194] [2021-06-06 00:27:29,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968698194] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:27:29,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1766638349] [2021-06-06 00:27:29,753 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-06 00:27:29,779 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-06 00:27:29,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:27:29,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-06 00:27:29,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:27:30,174 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:27:30,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1766638349] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:27:30,175 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:27:30,175 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 14] total 31 [2021-06-06 00:27:30,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246550992] [2021-06-06 00:27:30,175 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-06 00:27:30,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:27:30,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-06 00:27:30,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=850, Unknown=0, NotChecked=0, Total=930 [2021-06-06 00:27:30,175 INFO L87 Difference]: Start difference. First operand 6530 states and 15292 transitions. Second operand has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 31 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:27:34,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:27:34,432 INFO L93 Difference]: Finished difference Result 8866 states and 20480 transitions. [2021-06-06 00:27:34,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-06-06 00:27:34,433 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 31 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-06 00:27:34,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:27:34,441 INFO L225 Difference]: With dead ends: 8866 [2021-06-06 00:27:34,442 INFO L226 Difference]: Without dead ends: 8800 [2021-06-06 00:27:34,442 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3379 ImplicationChecksByTransitivity, 3435.2ms TimeCoverageRelationStatistics Valid=1022, Invalid=10534, Unknown=0, NotChecked=0, Total=11556 [2021-06-06 00:27:34,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8800 states. [2021-06-06 00:27:34,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8800 to 6612. [2021-06-06 00:27:34,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6612 states, 6611 states have (on average 2.341249432763576) internal successors, (15478), 6611 states have internal predecessors, (15478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:27:34,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6612 states to 6612 states and 15478 transitions. [2021-06-06 00:27:34,526 INFO L78 Accepts]: Start accepts. Automaton has 6612 states and 15478 transitions. Word has length 37 [2021-06-06 00:27:34,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:27:34,526 INFO L482 AbstractCegarLoop]: Abstraction has 6612 states and 15478 transitions. [2021-06-06 00:27:34,526 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 31 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:27:34,526 INFO L276 IsEmpty]: Start isEmpty. Operand 6612 states and 15478 transitions. [2021-06-06 00:27:34,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-06 00:27:34,533 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:27:34,533 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:27:34,733 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2209 [2021-06-06 00:27:34,733 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:27:34,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:27:34,734 INFO L82 PathProgramCache]: Analyzing trace with hash -1064850861, now seen corresponding path program 136 times [2021-06-06 00:27:34,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:27:34,734 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288810714] [2021-06-06 00:27:34,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:27:34,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:27:35,004 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:27:35,004 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:27:35,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288810714] [2021-06-06 00:27:35,004 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288810714] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:27:35,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295704074] [2021-06-06 00:27:35,004 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 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 [2021-06-06 00:27:35,031 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:27:35,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:27:35,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-06 00:27:35,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:27:35,486 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:27:35,486 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1295704074] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:27:35,487 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:27:35,487 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 14] total 31 [2021-06-06 00:27:35,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221805772] [2021-06-06 00:27:35,487 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-06 00:27:35,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:27:35,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-06 00:27:35,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=850, Unknown=0, NotChecked=0, Total=930 [2021-06-06 00:27:35,487 INFO L87 Difference]: Start difference. First operand 6612 states and 15478 transitions. Second operand has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 31 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:27:40,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:27:40,710 INFO L93 Difference]: Finished difference Result 10348 states and 23647 transitions. [2021-06-06 00:27:40,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-06-06 00:27:40,710 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 31 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-06 00:27:40,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:27:40,719 INFO L225 Difference]: With dead ends: 10348 [2021-06-06 00:27:40,719 INFO L226 Difference]: Without dead ends: 10305 [2021-06-06 00:27:40,720 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4756 ImplicationChecksByTransitivity, 4378.8ms TimeCoverageRelationStatistics Valid=1422, Invalid=13830, Unknown=0, NotChecked=0, Total=15252 [2021-06-06 00:27:40,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10305 states. [2021-06-06 00:27:40,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10305 to 6781. [2021-06-06 00:27:40,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6781 states, 6780 states have (on average 2.344395280235988) internal successors, (15895), 6780 states have internal predecessors, (15895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:27:40,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6781 states to 6781 states and 15895 transitions. [2021-06-06 00:27:40,805 INFO L78 Accepts]: Start accepts. Automaton has 6781 states and 15895 transitions. Word has length 37 [2021-06-06 00:27:40,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:27:40,805 INFO L482 AbstractCegarLoop]: Abstraction has 6781 states and 15895 transitions. [2021-06-06 00:27:40,805 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 31 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:27:40,805 INFO L276 IsEmpty]: Start isEmpty. Operand 6781 states and 15895 transitions. [2021-06-06 00:27:40,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-06 00:27:40,811 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:27:40,811 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:27:41,011 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2218,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:27:41,011 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:27:41,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:27:41,011 INFO L82 PathProgramCache]: Analyzing trace with hash 535237559, now seen corresponding path program 137 times [2021-06-06 00:27:41,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:27:41,012 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21941697] [2021-06-06 00:27:41,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:27:41,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:27:41,287 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:27:41,287 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:27:41,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21941697] [2021-06-06 00:27:41,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21941697] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:27:41,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [649058004] [2021-06-06 00:27:41,287 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 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 [2021-06-06 00:27:41,314 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-06 00:27:41,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:27:41,315 WARN L261 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-06 00:27:41,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:27:42,047 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:27:42,048 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [649058004] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:27:42,048 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:27:42,048 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 37 [2021-06-06 00:27:42,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726031742] [2021-06-06 00:27:42,048 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-06 00:27:42,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:27:42,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-06 00:27:42,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=1254, Unknown=0, NotChecked=0, Total=1406 [2021-06-06 00:27:42,048 INFO L87 Difference]: Start difference. First operand 6781 states and 15895 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) [2021-06-06 00:27:44,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:27:44,526 INFO L93 Difference]: Finished difference Result 7588 states and 17601 transitions. [2021-06-06 00:27:44,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-06 00:27:44,526 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 37 [2021-06-06 00:27:44,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:27:44,534 INFO L225 Difference]: With dead ends: 7588 [2021-06-06 00:27:44,535 INFO L226 Difference]: Without dead ends: 7588 [2021-06-06 00:27:44,535 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2433 ImplicationChecksByTransitivity, 2411.5ms TimeCoverageRelationStatistics Valid=839, Invalid=7171, Unknown=0, NotChecked=0, Total=8010 [2021-06-06 00:27:44,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7588 states. [2021-06-06 00:27:44,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7588 to 6907. [2021-06-06 00:27:44,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6907 states, 6906 states have (on average 2.347958297132928) internal successors, (16215), 6906 states have internal predecessors, (16215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:27:44,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6907 states to 6907 states and 16215 transitions. [2021-06-06 00:27:44,614 INFO L78 Accepts]: Start accepts. Automaton has 6907 states and 16215 transitions. Word has length 37 [2021-06-06 00:27:44,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:27:44,614 INFO L482 AbstractCegarLoop]: Abstraction has 6907 states and 16215 transitions. [2021-06-06 00:27:44,614 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) [2021-06-06 00:27:44,614 INFO L276 IsEmpty]: Start isEmpty. Operand 6907 states and 16215 transitions. [2021-06-06 00:27:44,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-06 00:27:44,620 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:27:44,620 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:27:44,820 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2228 [2021-06-06 00:27:44,820 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:27:44,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:27:44,821 INFO L82 PathProgramCache]: Analyzing trace with hash 596039863, now seen corresponding path program 138 times [2021-06-06 00:27:44,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:27:44,821 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107910198] [2021-06-06 00:27:44,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:27:44,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:27:45,106 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:27:45,107 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:27:45,107 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107910198] [2021-06-06 00:27:45,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107910198] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:27:45,107 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701242367] [2021-06-06 00:27:45,107 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 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 [2021-06-06 00:27:45,133 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-06 00:27:45,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:27:45,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-06 00:27:45,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:27:45,785 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:27:45,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [701242367] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:27:45,785 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:27:45,785 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 33 [2021-06-06 00:27:45,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118043369] [2021-06-06 00:27:45,785 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-06 00:27:45,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:27:45,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-06 00:27:45,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1004, Unknown=0, NotChecked=0, Total=1122 [2021-06-06 00:27:45,786 INFO L87 Difference]: Start difference. First operand 6907 states and 16215 transitions. Second operand has 34 states, 34 states have (on average 2.0294117647058822) internal successors, (69), 33 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) [2021-06-06 00:27:50,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:27:50,989 INFO L93 Difference]: Finished difference Result 9465 states and 21940 transitions. [2021-06-06 00:27:50,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2021-06-06 00:27:50,990 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.0294117647058822) internal successors, (69), 33 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 37 [2021-06-06 00:27:50,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:27:50,997 INFO L225 Difference]: With dead ends: 9465 [2021-06-06 00:27:50,997 INFO L226 Difference]: Without dead ends: 9404 [2021-06-06 00:27:50,998 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4905 ImplicationChecksByTransitivity, 4841.3ms TimeCoverageRelationStatistics Valid=1741, Invalid=13021, Unknown=0, NotChecked=0, Total=14762 [2021-06-06 00:27:51,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9404 states. [2021-06-06 00:27:51,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9404 to 7012. [2021-06-06 00:27:51,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7012 states, 7011 states have (on average 2.3451718727713593) internal successors, (16442), 7011 states have internal predecessors, (16442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:27:51,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7012 states to 7012 states and 16442 transitions. [2021-06-06 00:27:51,074 INFO L78 Accepts]: Start accepts. Automaton has 7012 states and 16442 transitions. Word has length 37 [2021-06-06 00:27:51,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:27:51,074 INFO L482 AbstractCegarLoop]: Abstraction has 7012 states and 16442 transitions. [2021-06-06 00:27:51,074 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.0294117647058822) internal successors, (69), 33 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) [2021-06-06 00:27:51,075 INFO L276 IsEmpty]: Start isEmpty. Operand 7012 states and 16442 transitions. [2021-06-06 00:27:51,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-06 00:27:51,080 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:27:51,081 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:27:51,281 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2247 [2021-06-06 00:27:51,281 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:27:51,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:27:51,281 INFO L82 PathProgramCache]: Analyzing trace with hash -1294610557, now seen corresponding path program 139 times [2021-06-06 00:27:51,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:27:51,281 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932270301] [2021-06-06 00:27:51,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:27:51,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:27:51,548 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:27:51,549 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:27:51,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932270301] [2021-06-06 00:27:51,549 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932270301] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:27:51,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1775725610] [2021-06-06 00:27:51,549 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 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 [2021-06-06 00:27:51,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:27:51,575 WARN L261 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 55 conjunts are in the unsatisfiable core [2021-06-06 00:27:51,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:27:52,259 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:27:52,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1775725610] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:27:52,259 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:27:52,259 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-06-06 00:27:52,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444115887] [2021-06-06 00:27:52,259 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-06 00:27:52,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:27:52,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-06 00:27:52,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=1036, Unknown=0, NotChecked=0, Total=1190 [2021-06-06 00:27:52,260 INFO L87 Difference]: Start difference. First operand 7012 states and 16442 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) [2021-06-06 00:27:56,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:27:56,808 INFO L93 Difference]: Finished difference Result 12834 states and 29277 transitions. [2021-06-06 00:27:56,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2021-06-06 00:27:56,808 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 37 [2021-06-06 00:27:56,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:27:56,821 INFO L225 Difference]: With dead ends: 12834 [2021-06-06 00:27:56,821 INFO L226 Difference]: Without dead ends: 12677 [2021-06-06 00:27:56,822 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6069 ImplicationChecksByTransitivity, 4291.6ms TimeCoverageRelationStatistics Valid=2193, Invalid=14319, Unknown=0, NotChecked=0, Total=16512 [2021-06-06 00:27:56,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12677 states. [2021-06-06 00:27:56,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12677 to 7393. [2021-06-06 00:27:56,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7393 states, 7392 states have (on average 2.354707792207792) internal successors, (17406), 7392 states have internal predecessors, (17406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:27:56,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7393 states to 7393 states and 17406 transitions. [2021-06-06 00:27:56,927 INFO L78 Accepts]: Start accepts. Automaton has 7393 states and 17406 transitions. Word has length 37 [2021-06-06 00:27:56,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:27:56,927 INFO L482 AbstractCegarLoop]: Abstraction has 7393 states and 17406 transitions. [2021-06-06 00:27:56,927 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) [2021-06-06 00:27:56,927 INFO L276 IsEmpty]: Start isEmpty. Operand 7393 states and 17406 transitions. [2021-06-06 00:27:56,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-06 00:27:56,933 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:27:56,933 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:27:57,133 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2268 [2021-06-06 00:27:57,134 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:27:57,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:27:57,134 INFO L82 PathProgramCache]: Analyzing trace with hash 889571579, now seen corresponding path program 140 times [2021-06-06 00:27:57,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:27:57,134 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284402456] [2021-06-06 00:27:57,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:27:57,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:27:57,402 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:27:57,402 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:27:57,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284402456] [2021-06-06 00:27:57,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284402456] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:27:57,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [26365057] [2021-06-06 00:27:57,402 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 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 [2021-06-06 00:27:57,428 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:27:57,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:27:57,428 WARN L261 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-06 00:27:57,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:27:58,240 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:27:58,240 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [26365057] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:27:58,240 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:27:58,240 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20] total 37 [2021-06-06 00:27:58,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084116554] [2021-06-06 00:27:58,241 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-06 00:27:58,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:27:58,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-06 00:27:58,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1264, Unknown=0, NotChecked=0, Total=1406 [2021-06-06 00:27:58,241 INFO L87 Difference]: Start difference. First operand 7393 states and 17406 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) [2021-06-06 00:28:02,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:28:02,228 INFO L93 Difference]: Finished difference Result 10016 states and 23322 transitions. [2021-06-06 00:28:02,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-06 00:28:02,229 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 37 [2021-06-06 00:28:02,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:28:02,237 INFO L225 Difference]: With dead ends: 10016 [2021-06-06 00:28:02,237 INFO L226 Difference]: Without dead ends: 9961 [2021-06-06 00:28:02,237 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2343 ImplicationChecksByTransitivity, 3886.0ms TimeCoverageRelationStatistics Valid=960, Invalid=7050, Unknown=0, NotChecked=0, Total=8010 [2021-06-06 00:28:02,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9961 states. [2021-06-06 00:28:02,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9961 to 7444. [2021-06-06 00:28:02,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7444 states, 7443 states have (on average 2.3526803708182187) internal successors, (17511), 7443 states have internal predecessors, (17511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:02,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7444 states to 7444 states and 17511 transitions. [2021-06-06 00:28:02,316 INFO L78 Accepts]: Start accepts. Automaton has 7444 states and 17511 transitions. Word has length 37 [2021-06-06 00:28:02,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:28:02,316 INFO L482 AbstractCegarLoop]: Abstraction has 7444 states and 17511 transitions. [2021-06-06 00:28:02,317 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) [2021-06-06 00:28:02,317 INFO L276 IsEmpty]: Start isEmpty. Operand 7444 states and 17511 transitions. [2021-06-06 00:28:02,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-06 00:28:02,322 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:28:02,322 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:28:02,522 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2285,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:28:02,523 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:28:02,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:28:02,523 INFO L82 PathProgramCache]: Analyzing trace with hash 1449579259, now seen corresponding path program 141 times [2021-06-06 00:28:02,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:28:02,523 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128878042] [2021-06-06 00:28:02,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:28:02,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:28:02,849 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:28:02,849 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:28:02,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128878042] [2021-06-06 00:28:02,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [128878042] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:28:02,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1128417765] [2021-06-06 00:28:02,849 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 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 [2021-06-06 00:28:02,875 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-06 00:28:02,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:28:02,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-06 00:28:02,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:28:03,239 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:28:03,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1128417765] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:28:03,239 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:28:03,239 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 14] total 32 [2021-06-06 00:28:03,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135285993] [2021-06-06 00:28:03,239 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-06 00:28:03,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:28:03,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-06 00:28:03,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=892, Unknown=0, NotChecked=0, Total=992 [2021-06-06 00:28:03,240 INFO L87 Difference]: Start difference. First operand 7444 states and 17511 transitions. Second operand has 32 states, 32 states have (on average 2.1875) internal successors, (70), 32 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:06,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:28:06,332 INFO L93 Difference]: Finished difference Result 10247 states and 23785 transitions. [2021-06-06 00:28:06,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-06-06 00:28:06,333 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.1875) internal successors, (70), 32 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-06 00:28:06,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:28:06,342 INFO L225 Difference]: With dead ends: 10247 [2021-06-06 00:28:06,342 INFO L226 Difference]: Without dead ends: 10170 [2021-06-06 00:28:06,343 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2081 ImplicationChecksByTransitivity, 2812.5ms TimeCoverageRelationStatistics Valid=893, Invalid=6589, Unknown=0, NotChecked=0, Total=7482 [2021-06-06 00:28:06,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10170 states. [2021-06-06 00:28:06,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10170 to 7464. [2021-06-06 00:28:06,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7464 states, 7463 states have (on average 2.352405198981643) internal successors, (17556), 7463 states have internal predecessors, (17556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:06,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7464 states to 7464 states and 17556 transitions. [2021-06-06 00:28:06,433 INFO L78 Accepts]: Start accepts. Automaton has 7464 states and 17556 transitions. Word has length 37 [2021-06-06 00:28:06,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:28:06,433 INFO L482 AbstractCegarLoop]: Abstraction has 7464 states and 17556 transitions. [2021-06-06 00:28:06,433 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.1875) internal successors, (70), 32 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:06,433 INFO L276 IsEmpty]: Start isEmpty. Operand 7464 states and 17556 transitions. [2021-06-06 00:28:06,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-06 00:28:06,439 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:28:06,440 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:28:06,640 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2307 [2021-06-06 00:28:06,640 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:28:06,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:28:06,641 INFO L82 PathProgramCache]: Analyzing trace with hash 380397771, now seen corresponding path program 142 times [2021-06-06 00:28:06,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:28:06,641 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539362403] [2021-06-06 00:28:06,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:28:06,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:28:06,956 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:28:06,956 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:28:06,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539362403] [2021-06-06 00:28:06,956 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539362403] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:28:06,957 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1945592360] [2021-06-06 00:28:06,957 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 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 [2021-06-06 00:28:06,982 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:28:06,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:28:06,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-06 00:28:06,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:28:07,592 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:28:07,592 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1945592360] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:28:07,592 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:28:07,592 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 31 [2021-06-06 00:28:07,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546465525] [2021-06-06 00:28:07,593 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-06 00:28:07,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:28:07,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-06 00:28:07,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=872, Unknown=0, NotChecked=0, Total=992 [2021-06-06 00:28:07,593 INFO L87 Difference]: Start difference. First operand 7464 states and 17556 transitions. Second operand has 32 states, 32 states have (on average 2.09375) internal successors, (67), 31 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) [2021-06-06 00:28:10,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:28:10,565 INFO L93 Difference]: Finished difference Result 11331 states and 26458 transitions. [2021-06-06 00:28:10,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-06 00:28:10,566 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.09375) internal successors, (67), 31 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 37 [2021-06-06 00:28:10,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:28:10,577 INFO L225 Difference]: With dead ends: 11331 [2021-06-06 00:28:10,577 INFO L226 Difference]: Without dead ends: 11256 [2021-06-06 00:28:10,577 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2151 ImplicationChecksByTransitivity, 2971.0ms TimeCoverageRelationStatistics Valid=1062, Invalid=6078, Unknown=0, NotChecked=0, Total=7140 [2021-06-06 00:28:10,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11256 states. [2021-06-06 00:28:10,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11256 to 8172. [2021-06-06 00:28:10,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8172 states, 8171 states have (on average 2.3583404724023986) internal successors, (19270), 8171 states have internal predecessors, (19270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:10,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8172 states to 8172 states and 19270 transitions. [2021-06-06 00:28:10,676 INFO L78 Accepts]: Start accepts. Automaton has 8172 states and 19270 transitions. Word has length 37 [2021-06-06 00:28:10,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:28:10,676 INFO L482 AbstractCegarLoop]: Abstraction has 8172 states and 19270 transitions. [2021-06-06 00:28:10,676 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.09375) internal successors, (67), 31 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) [2021-06-06 00:28:10,676 INFO L276 IsEmpty]: Start isEmpty. Operand 8172 states and 19270 transitions. [2021-06-06 00:28:10,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-06 00:28:10,682 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:28:10,682 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:28:10,883 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2316 [2021-06-06 00:28:10,883 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:28:10,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:28:10,883 INFO L82 PathProgramCache]: Analyzing trace with hash -1713251961, now seen corresponding path program 143 times [2021-06-06 00:28:10,883 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:28:10,883 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723978975] [2021-06-06 00:28:10,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:28:10,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:28:11,167 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:28:11,167 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:28:11,167 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723978975] [2021-06-06 00:28:11,167 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [723978975] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:28:11,167 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [262979788] [2021-06-06 00:28:11,167 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 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 [2021-06-06 00:28:11,194 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-06 00:28:11,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:28:11,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-06 00:28:11,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:28:11,776 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:28:11,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [262979788] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:28:11,776 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:28:11,776 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 17] total 32 [2021-06-06 00:28:11,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170931799] [2021-06-06 00:28:11,776 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-06 00:28:11,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:28:11,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-06 00:28:11,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=938, Unknown=0, NotChecked=0, Total=1056 [2021-06-06 00:28:11,777 INFO L87 Difference]: Start difference. First operand 8172 states and 19270 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) [2021-06-06 00:28:15,157 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 35 [2021-06-06 00:28:16,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:28:16,677 INFO L93 Difference]: Finished difference Result 11271 states and 26216 transitions. [2021-06-06 00:28:16,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-06-06 00:28:16,678 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 37 [2021-06-06 00:28:16,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:28:16,688 INFO L225 Difference]: With dead ends: 11271 [2021-06-06 00:28:16,689 INFO L226 Difference]: Without dead ends: 11205 [2021-06-06 00:28:16,689 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2992 ImplicationChecksByTransitivity, 4597.5ms TimeCoverageRelationStatistics Valid=1180, Invalid=8326, Unknown=0, NotChecked=0, Total=9506 [2021-06-06 00:28:16,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11205 states. [2021-06-06 00:28:16,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11205 to 8408. [2021-06-06 00:28:16,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8408 states, 8407 states have (on average 2.3495896276912096) internal successors, (19753), 8407 states have internal predecessors, (19753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:16,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8408 states to 8408 states and 19753 transitions. [2021-06-06 00:28:16,791 INFO L78 Accepts]: Start accepts. Automaton has 8408 states and 19753 transitions. Word has length 37 [2021-06-06 00:28:16,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:28:16,791 INFO L482 AbstractCegarLoop]: Abstraction has 8408 states and 19753 transitions. [2021-06-06 00:28:16,791 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) [2021-06-06 00:28:16,791 INFO L276 IsEmpty]: Start isEmpty. Operand 8408 states and 19753 transitions. [2021-06-06 00:28:16,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-06 00:28:16,798 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:28:16,798 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:28:17,004 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2336,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:28:17,005 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:28:17,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:28:17,005 INFO L82 PathProgramCache]: Analyzing trace with hash -787483265, now seen corresponding path program 144 times [2021-06-06 00:28:17,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:28:17,005 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403890606] [2021-06-06 00:28:17,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:28:17,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:28:17,350 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:28:17,351 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:28:17,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403890606] [2021-06-06 00:28:17,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403890606] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:28:17,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [297340236] [2021-06-06 00:28:17,351 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 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 [2021-06-06 00:28:17,377 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-06 00:28:17,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:28:17,378 WARN L261 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-06 00:28:17,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:28:18,250 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:28:18,250 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [297340236] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:28:18,250 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:28:18,250 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2021-06-06 00:28:18,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783717511] [2021-06-06 00:28:18,250 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-06 00:28:18,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:28:18,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-06 00:28:18,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=1208, Unknown=0, NotChecked=0, Total=1332 [2021-06-06 00:28:18,250 INFO L87 Difference]: Start difference. First operand 8408 states and 19753 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) [2021-06-06 00:28:21,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:28:21,083 INFO L93 Difference]: Finished difference Result 9319 states and 21711 transitions. [2021-06-06 00:28:21,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-06 00:28:21,084 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 37 [2021-06-06 00:28:21,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:28:21,092 INFO L225 Difference]: With dead ends: 9319 [2021-06-06 00:28:21,092 INFO L226 Difference]: Without dead ends: 9265 [2021-06-06 00:28:21,093 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1958 ImplicationChecksByTransitivity, 2772.9ms TimeCoverageRelationStatistics Valid=595, Invalid=6211, Unknown=0, NotChecked=0, Total=6806 [2021-06-06 00:28:21,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9265 states. [2021-06-06 00:28:21,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9265 to 8562. [2021-06-06 00:28:21,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8562 states, 8561 states have (on average 2.3510103959817776) internal successors, (20127), 8561 states have internal predecessors, (20127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:21,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8562 states to 8562 states and 20127 transitions. [2021-06-06 00:28:21,182 INFO L78 Accepts]: Start accepts. Automaton has 8562 states and 20127 transitions. Word has length 37 [2021-06-06 00:28:21,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:28:21,182 INFO L482 AbstractCegarLoop]: Abstraction has 8562 states and 20127 transitions. [2021-06-06 00:28:21,182 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) [2021-06-06 00:28:21,182 INFO L276 IsEmpty]: Start isEmpty. Operand 8562 states and 20127 transitions. [2021-06-06 00:28:21,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-06 00:28:21,189 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:28:21,189 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:28:21,389 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2356 [2021-06-06 00:28:21,390 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:28:21,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:28:21,390 INFO L82 PathProgramCache]: Analyzing trace with hash 1338722055, now seen corresponding path program 145 times [2021-06-06 00:28:21,390 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:28:21,390 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650816832] [2021-06-06 00:28:21,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:28:21,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:28:21,724 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:28:21,724 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:28:21,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650816832] [2021-06-06 00:28:21,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650816832] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:28:21,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635444641] [2021-06-06 00:28:21,724 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 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 [2021-06-06 00:28:21,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:28:21,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-06 00:28:21,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:28:22,551 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 4 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:28:22,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [635444641] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:28:22,551 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:28:22,551 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-06 00:28:22,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763713888] [2021-06-06 00:28:22,552 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-06 00:28:22,552 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:28:22,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-06 00:28:22,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=1238, Unknown=0, NotChecked=0, Total=1332 [2021-06-06 00:28:22,552 INFO L87 Difference]: Start difference. First operand 8562 states and 20127 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) [2021-06-06 00:28:29,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:28:29,208 INFO L93 Difference]: Finished difference Result 9415 states and 21837 transitions. [2021-06-06 00:28:29,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2021-06-06 00:28:29,208 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 37 [2021-06-06 00:28:29,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:28:29,217 INFO L225 Difference]: With dead ends: 9415 [2021-06-06 00:28:29,217 INFO L226 Difference]: Without dead ends: 9370 [2021-06-06 00:28:29,217 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5155 ImplicationChecksByTransitivity, 5940.0ms TimeCoverageRelationStatistics Valid=927, Invalid=15329, Unknown=0, NotChecked=0, Total=16256 [2021-06-06 00:28:29,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9370 states. [2021-06-06 00:28:29,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9370 to 8678. [2021-06-06 00:28:29,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8678 states, 8677 states have (on average 2.355076639391495) internal successors, (20435), 8677 states have internal predecessors, (20435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:29,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8678 states to 8678 states and 20435 transitions. [2021-06-06 00:28:29,301 INFO L78 Accepts]: Start accepts. Automaton has 8678 states and 20435 transitions. Word has length 37 [2021-06-06 00:28:29,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:28:29,301 INFO L482 AbstractCegarLoop]: Abstraction has 8678 states and 20435 transitions. [2021-06-06 00:28:29,301 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) [2021-06-06 00:28:29,302 INFO L276 IsEmpty]: Start isEmpty. Operand 8678 states and 20435 transitions. [2021-06-06 00:28:29,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-06 00:28:29,308 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:28:29,308 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:28:29,508 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2374,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:28:29,509 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:28:29,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:28:29,509 INFO L82 PathProgramCache]: Analyzing trace with hash -2123820725, now seen corresponding path program 146 times [2021-06-06 00:28:29,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:28:29,509 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500753078] [2021-06-06 00:28:29,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:28:29,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:28:29,849 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:28:29,849 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:28:29,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500753078] [2021-06-06 00:28:29,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500753078] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:28:29,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1989902646] [2021-06-06 00:28:29,850 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 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 [2021-06-06 00:28:29,873 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:28:29,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:28:29,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-06 00:28:29,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:28:30,530 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:28:30,531 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1989902646] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:28:30,531 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:28:30,531 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 35 [2021-06-06 00:28:30,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525318013] [2021-06-06 00:28:30,531 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-06 00:28:30,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:28:30,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-06 00:28:30,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=1170, Unknown=0, NotChecked=0, Total=1260 [2021-06-06 00:28:30,531 INFO L87 Difference]: Start difference. First operand 8678 states and 20435 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) [2021-06-06 00:28:37,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:28:37,266 INFO L93 Difference]: Finished difference Result 9447 states and 21893 transitions. [2021-06-06 00:28:37,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2021-06-06 00:28:37,267 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 37 [2021-06-06 00:28:37,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:28:37,275 INFO L225 Difference]: With dead ends: 9447 [2021-06-06 00:28:37,275 INFO L226 Difference]: Without dead ends: 9429 [2021-06-06 00:28:37,276 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4655 ImplicationChecksByTransitivity, 5800.6ms TimeCoverageRelationStatistics Valid=962, Invalid=14290, Unknown=0, NotChecked=0, Total=15252 [2021-06-06 00:28:37,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9429 states. [2021-06-06 00:28:37,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9429 to 8687. [2021-06-06 00:28:37,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8687 states, 8686 states have (on average 2.354823854478471) internal successors, (20454), 8686 states have internal predecessors, (20454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:37,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8687 states to 8687 states and 20454 transitions. [2021-06-06 00:28:37,371 INFO L78 Accepts]: Start accepts. Automaton has 8687 states and 20454 transitions. Word has length 37 [2021-06-06 00:28:37,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:28:37,371 INFO L482 AbstractCegarLoop]: Abstraction has 8687 states and 20454 transitions. [2021-06-06 00:28:37,371 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) [2021-06-06 00:28:37,371 INFO L276 IsEmpty]: Start isEmpty. Operand 8687 states and 20454 transitions. [2021-06-06 00:28:37,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-06 00:28:37,379 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:28:37,379 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:28:37,579 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2406 [2021-06-06 00:28:37,579 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:28:37,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:28:37,580 INFO L82 PathProgramCache]: Analyzing trace with hash 2042403983, now seen corresponding path program 147 times [2021-06-06 00:28:37,580 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:28:37,580 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016041314] [2021-06-06 00:28:37,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:28:37,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:28:37,976 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:28:37,977 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:28:37,977 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016041314] [2021-06-06 00:28:37,977 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016041314] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:28:37,977 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [393898649] [2021-06-06 00:28:37,977 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-06 00:28:38,004 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-06 00:28:38,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:28:38,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-06 00:28:38,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:28:38,414 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 14 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:28:38,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [393898649] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:28:38,414 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:28:38,414 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 15] total 32 [2021-06-06 00:28:38,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325792327] [2021-06-06 00:28:38,414 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-06 00:28:38,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:28:38,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-06 00:28:38,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=902, Unknown=0, NotChecked=0, Total=992 [2021-06-06 00:28:38,415 INFO L87 Difference]: Start difference. First operand 8687 states and 20454 transitions. Second operand has 32 states, 32 states have (on average 2.09375) internal successors, (67), 32 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) [2021-06-06 00:28:43,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:28:43,906 INFO L93 Difference]: Finished difference Result 10286 states and 23827 transitions. [2021-06-06 00:28:43,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2021-06-06 00:28:43,906 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.09375) internal successors, (67), 32 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 37 [2021-06-06 00:28:43,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:28:43,916 INFO L225 Difference]: With dead ends: 10286 [2021-06-06 00:28:43,916 INFO L226 Difference]: Without dead ends: 10163 [2021-06-06 00:28:43,917 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4593 ImplicationChecksByTransitivity, 4645.1ms TimeCoverageRelationStatistics Valid=1527, Invalid=14223, Unknown=0, NotChecked=0, Total=15750 [2021-06-06 00:28:43,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10163 states. [2021-06-06 00:28:44,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10163 to 8213. [2021-06-06 00:28:44,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8213 states, 8212 states have (on average 2.32501217730151) internal successors, (19093), 8212 states have internal predecessors, (19093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:44,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8213 states to 8213 states and 19093 transitions. [2021-06-06 00:28:44,023 INFO L78 Accepts]: Start accepts. Automaton has 8213 states and 19093 transitions. Word has length 37 [2021-06-06 00:28:44,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:28:44,023 INFO L482 AbstractCegarLoop]: Abstraction has 8213 states and 19093 transitions. [2021-06-06 00:28:44,023 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.09375) internal successors, (67), 32 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) [2021-06-06 00:28:44,023 INFO L276 IsEmpty]: Start isEmpty. Operand 8213 states and 19093 transitions. [2021-06-06 00:28:44,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-06 00:28:44,030 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:28:44,030 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:28:44,230 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2437,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:28:44,230 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:28:44,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:28:44,231 INFO L82 PathProgramCache]: Analyzing trace with hash -726680961, now seen corresponding path program 148 times [2021-06-06 00:28:44,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:28:44,231 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678241284] [2021-06-06 00:28:44,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:28:44,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:28:44,569 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:28:44,569 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:28:44,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678241284] [2021-06-06 00:28:44,569 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678241284] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:28:44,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1412858040] [2021-06-06 00:28:44,570 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 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 [2021-06-06 00:28:44,594 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:28:44,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:28:44,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-06 00:28:44,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:28:45,242 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:28:45,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1412858040] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:28:45,242 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:28:45,242 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 33 [2021-06-06 00:28:45,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79542712] [2021-06-06 00:28:45,242 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-06 00:28:45,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:28:45,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-06 00:28:45,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1006, Unknown=0, NotChecked=0, Total=1122 [2021-06-06 00:28:45,243 INFO L87 Difference]: Start difference. First operand 8213 states and 19093 transitions. Second operand has 34 states, 34 states have (on average 2.0294117647058822) internal successors, (69), 33 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) [2021-06-06 00:28:48,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:28:48,263 INFO L93 Difference]: Finished difference Result 10792 states and 24889 transitions. [2021-06-06 00:28:48,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-06-06 00:28:48,263 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.0294117647058822) internal successors, (69), 33 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 37 [2021-06-06 00:28:48,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:28:48,273 INFO L225 Difference]: With dead ends: 10792 [2021-06-06 00:28:48,273 INFO L226 Difference]: Without dead ends: 10724 [2021-06-06 00:28:48,274 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2275 ImplicationChecksByTransitivity, 2901.4ms TimeCoverageRelationStatistics Valid=745, Invalid=7087, Unknown=0, NotChecked=0, Total=7832 [2021-06-06 00:28:48,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10724 states. [2021-06-06 00:28:48,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10724 to 8396. [2021-06-06 00:28:48,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8396 states, 8395 states have (on average 2.321262656343061) internal successors, (19487), 8395 states have internal predecessors, (19487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:48,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8396 states to 8396 states and 19487 transitions. [2021-06-06 00:28:48,371 INFO L78 Accepts]: Start accepts. Automaton has 8396 states and 19487 transitions. Word has length 37 [2021-06-06 00:28:48,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:28:48,371 INFO L482 AbstractCegarLoop]: Abstraction has 8396 states and 19487 transitions. [2021-06-06 00:28:48,371 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.0294117647058822) internal successors, (69), 33 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) [2021-06-06 00:28:48,371 INFO L276 IsEmpty]: Start isEmpty. Operand 8396 states and 19487 transitions. [2021-06-06 00:28:48,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-06 00:28:48,378 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:28:48,378 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:28:48,579 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2454 [2021-06-06 00:28:48,579 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:28:48,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:28:48,579 INFO L82 PathProgramCache]: Analyzing trace with hash 1054854083, now seen corresponding path program 149 times [2021-06-06 00:28:48,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:28:48,579 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606980744] [2021-06-06 00:28:48,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:28:48,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:28:48,915 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:28:48,915 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:28:48,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606980744] [2021-06-06 00:28:48,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606980744] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:28:48,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [200671080] [2021-06-06 00:28:48,915 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-06 00:28:48,943 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-06 00:28:48,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:28:48,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-06 00:28:48,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:28:49,644 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:28:49,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [200671080] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:28:49,644 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:28:49,644 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 33 [2021-06-06 00:28:49,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742281385] [2021-06-06 00:28:49,644 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-06 00:28:49,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:28:49,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-06 00:28:49,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1006, Unknown=0, NotChecked=0, Total=1122 [2021-06-06 00:28:49,645 INFO L87 Difference]: Start difference. First operand 8396 states and 19487 transitions. Second operand has 34 states, 34 states have (on average 2.0294117647058822) internal successors, (69), 33 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) [2021-06-06 00:28:53,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:28:53,692 INFO L93 Difference]: Finished difference Result 11349 states and 26070 transitions. [2021-06-06 00:28:53,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-06-06 00:28:53,692 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.0294117647058822) internal successors, (69), 33 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 37 [2021-06-06 00:28:53,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:28:53,703 INFO L225 Difference]: With dead ends: 11349 [2021-06-06 00:28:53,703 INFO L226 Difference]: Without dead ends: 11303 [2021-06-06 00:28:53,704 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2793 ImplicationChecksByTransitivity, 3641.0ms TimeCoverageRelationStatistics Valid=959, Invalid=8547, Unknown=0, NotChecked=0, Total=9506 [2021-06-06 00:28:53,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11303 states. [2021-06-06 00:28:53,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11303 to 8676. [2021-06-06 00:28:53,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8676 states, 8675 states have (on average 2.31700288184438) internal successors, (20100), 8675 states have internal predecessors, (20100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:53,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8676 states to 8676 states and 20100 transitions. [2021-06-06 00:28:53,804 INFO L78 Accepts]: Start accepts. Automaton has 8676 states and 20100 transitions. Word has length 37 [2021-06-06 00:28:53,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:28:53,805 INFO L482 AbstractCegarLoop]: Abstraction has 8676 states and 20100 transitions. [2021-06-06 00:28:53,805 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.0294117647058822) internal successors, (69), 33 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) [2021-06-06 00:28:53,805 INFO L276 IsEmpty]: Start isEmpty. Operand 8676 states and 20100 transitions. [2021-06-06 00:28:53,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-06 00:28:53,812 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:28:53,812 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:28:54,012 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2477 [2021-06-06 00:28:54,012 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:28:54,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:28:54,012 INFO L82 PathProgramCache]: Analyzing trace with hash 766205447, now seen corresponding path program 150 times [2021-06-06 00:28:54,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:28:54,013 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683154215] [2021-06-06 00:28:54,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:28:54,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:28:54,320 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:28:54,321 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:28:54,321 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683154215] [2021-06-06 00:28:54,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683154215] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:28:54,321 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376915859] [2021-06-06 00:28:54,321 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 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 [2021-06-06 00:28:54,347 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-06 00:28:54,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:28:54,348 WARN L261 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 54 conjunts are in the unsatisfiable core [2021-06-06 00:28:54,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:28:55,258 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:28:55,258 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1376915859] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:28:55,258 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:28:55,258 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 38 [2021-06-06 00:28:55,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739308413] [2021-06-06 00:28:55,258 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-06 00:28:55,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:28:55,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-06 00:28:55,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=1316, Unknown=0, NotChecked=0, Total=1482 [2021-06-06 00:28:55,259 INFO L87 Difference]: Start difference. First operand 8676 states and 20100 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) [2021-06-06 00:29:01,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:29:01,082 INFO L93 Difference]: Finished difference Result 12806 states and 29266 transitions. [2021-06-06 00:29:01,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2021-06-06 00:29:01,082 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 37 [2021-06-06 00:29:01,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:29:01,095 INFO L225 Difference]: With dead ends: 12806 [2021-06-06 00:29:01,095 INFO L226 Difference]: Without dead ends: 12763 [2021-06-06 00:29:01,095 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5274 ImplicationChecksByTransitivity, 5616.8ms TimeCoverageRelationStatistics Valid=1929, Invalid=13323, Unknown=0, NotChecked=0, Total=15252 [2021-06-06 00:29:01,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12763 states. [2021-06-06 00:29:01,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12763 to 8944. [2021-06-06 00:29:01,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8944 states, 8943 states have (on average 2.3187968243318795) internal successors, (20737), 8943 states have internal predecessors, (20737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:01,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8944 states to 8944 states and 20737 transitions. [2021-06-06 00:29:01,211 INFO L78 Accepts]: Start accepts. Automaton has 8944 states and 20737 transitions. Word has length 37 [2021-06-06 00:29:01,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:29:01,211 INFO L482 AbstractCegarLoop]: Abstraction has 8944 states and 20737 transitions. [2021-06-06 00:29:01,211 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) [2021-06-06 00:29:01,211 INFO L276 IsEmpty]: Start isEmpty. Operand 8944 states and 20737 transitions. [2021-06-06 00:29:01,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-06 00:29:01,218 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:29:01,219 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:29:01,419 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2499 [2021-06-06 00:29:01,419 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:29:01,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:29:01,419 INFO L82 PathProgramCache]: Analyzing trace with hash 1506799643, now seen corresponding path program 151 times [2021-06-06 00:29:01,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:29:01,419 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051075035] [2021-06-06 00:29:01,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:29:01,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:29:01,728 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:29:01,728 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:29:01,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051075035] [2021-06-06 00:29:01,728 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051075035] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:29:01,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [468378111] [2021-06-06 00:29:01,728 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:29:01,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:29:01,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-06 00:29:01,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:29:02,459 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:29:02,459 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [468378111] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:29:02,459 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:29:02,459 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 33 [2021-06-06 00:29:02,459 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480007502] [2021-06-06 00:29:02,459 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-06 00:29:02,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:29:02,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-06 00:29:02,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1007, Unknown=0, NotChecked=0, Total=1122 [2021-06-06 00:29:02,460 INFO L87 Difference]: Start difference. First operand 8944 states and 20737 transitions. Second operand has 34 states, 34 states have (on average 2.0294117647058822) internal successors, (69), 33 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) [2021-06-06 00:29:08,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:29:08,050 INFO L93 Difference]: Finished difference Result 13828 states and 31463 transitions. [2021-06-06 00:29:08,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-06-06 00:29:08,050 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.0294117647058822) internal successors, (69), 33 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 37 [2021-06-06 00:29:08,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:29:08,064 INFO L225 Difference]: With dead ends: 13828 [2021-06-06 00:29:08,064 INFO L226 Difference]: Without dead ends: 13763 [2021-06-06 00:29:08,066 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5053 ImplicationChecksByTransitivity, 4863.0ms TimeCoverageRelationStatistics Valid=1672, Invalid=13828, Unknown=0, NotChecked=0, Total=15500 [2021-06-06 00:29:08,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13763 states. [2021-06-06 00:29:08,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13763 to 9228. [2021-06-06 00:29:08,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9228 states, 9227 states have (on average 2.318630107293812) internal successors, (21394), 9227 states have internal predecessors, (21394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:08,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9228 states to 9228 states and 21394 transitions. [2021-06-06 00:29:08,207 INFO L78 Accepts]: Start accepts. Automaton has 9228 states and 21394 transitions. Word has length 37 [2021-06-06 00:29:08,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:29:08,207 INFO L482 AbstractCegarLoop]: Abstraction has 9228 states and 21394 transitions. [2021-06-06 00:29:08,207 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.0294117647058822) internal successors, (69), 33 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) [2021-06-06 00:29:08,207 INFO L276 IsEmpty]: Start isEmpty. Operand 9228 states and 21394 transitions. [2021-06-06 00:29:08,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-06 00:29:08,215 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:29:08,215 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:29:08,415 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2517 [2021-06-06 00:29:08,416 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:29:08,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:29:08,416 INFO L82 PathProgramCache]: Analyzing trace with hash -2038707397, now seen corresponding path program 152 times [2021-06-06 00:29:08,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:29:08,416 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516735534] [2021-06-06 00:29:08,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:29:08,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:29:08,699 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:29:08,699 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:29:08,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516735534] [2021-06-06 00:29:08,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516735534] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:29:08,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1107238899] [2021-06-06 00:29:08,699 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:29:08,724 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:29:08,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:29:08,725 WARN L261 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-06 00:29:08,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:29:09,487 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:29:09,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1107238899] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:29:09,487 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:29:09,487 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2021-06-06 00:29:09,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039593570] [2021-06-06 00:29:09,487 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-06 00:29:09,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:29:09,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-06 00:29:09,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=1189, Unknown=0, NotChecked=0, Total=1332 [2021-06-06 00:29:09,488 INFO L87 Difference]: Start difference. First operand 9228 states and 21394 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) [2021-06-06 00:29:12,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:29:12,783 INFO L93 Difference]: Finished difference Result 12038 states and 27683 transitions. [2021-06-06 00:29:12,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-06-06 00:29:12,783 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 37 [2021-06-06 00:29:12,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:29:12,793 INFO L225 Difference]: With dead ends: 12038 [2021-06-06 00:29:12,794 INFO L226 Difference]: Without dead ends: 11974 [2021-06-06 00:29:12,794 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2973 ImplicationChecksByTransitivity, 3309.8ms TimeCoverageRelationStatistics Valid=891, Invalid=8421, Unknown=0, NotChecked=0, Total=9312 [2021-06-06 00:29:12,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11974 states. [2021-06-06 00:29:12,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11974 to 9402. [2021-06-06 00:29:12,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9402 states, 9401 states have (on average 2.3177321561536006) internal successors, (21789), 9401 states have internal predecessors, (21789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:12,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9402 states to 9402 states and 21789 transitions. [2021-06-06 00:29:12,897 INFO L78 Accepts]: Start accepts. Automaton has 9402 states and 21789 transitions. Word has length 37 [2021-06-06 00:29:12,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:29:12,897 INFO L482 AbstractCegarLoop]: Abstraction has 9402 states and 21789 transitions. [2021-06-06 00:29:12,897 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) [2021-06-06 00:29:12,897 INFO L276 IsEmpty]: Start isEmpty. Operand 9402 states and 21789 transitions. [2021-06-06 00:29:12,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-06 00:29:12,905 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:29:12,905 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:29:13,105 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2538,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:29:13,106 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:29:13,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:29:13,106 INFO L82 PathProgramCache]: Analyzing trace with hash -1185168001, now seen corresponding path program 153 times [2021-06-06 00:29:13,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:29:13,106 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740010199] [2021-06-06 00:29:13,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:29:13,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:29:13,436 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:29:13,436 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:29:13,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740010199] [2021-06-06 00:29:13,436 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740010199] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:29:13,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473668176] [2021-06-06 00:29:13,436 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:29:13,462 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-06 00:29:13,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:29:13,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-06 00:29:13,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:29:13,856 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:29:13,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1473668176] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:29:13,857 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:29:13,857 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 14] total 32 [2021-06-06 00:29:13,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363931736] [2021-06-06 00:29:13,857 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-06 00:29:13,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:29:13,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-06 00:29:13,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=882, Unknown=0, NotChecked=0, Total=992 [2021-06-06 00:29:13,857 INFO L87 Difference]: Start difference. First operand 9402 states and 21789 transitions. Second operand has 32 states, 32 states have (on average 2.1875) internal successors, (70), 32 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:16,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:29:16,884 INFO L93 Difference]: Finished difference Result 13606 states and 31169 transitions. [2021-06-06 00:29:16,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-06-06 00:29:16,884 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.1875) internal successors, (70), 32 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-06 00:29:16,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:29:16,898 INFO L225 Difference]: With dead ends: 13606 [2021-06-06 00:29:16,899 INFO L226 Difference]: Without dead ends: 13480 [2021-06-06 00:29:16,899 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1885 ImplicationChecksByTransitivity, 2760.2ms TimeCoverageRelationStatistics Valid=981, Invalid=5991, Unknown=0, NotChecked=0, Total=6972 [2021-06-06 00:29:16,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13480 states. [2021-06-06 00:29:17,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13480 to 9857. [2021-06-06 00:29:17,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9857 states, 9856 states have (on average 2.3118912337662336) internal successors, (22786), 9856 states have internal predecessors, (22786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:17,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9857 states to 9857 states and 22786 transitions. [2021-06-06 00:29:17,039 INFO L78 Accepts]: Start accepts. Automaton has 9857 states and 22786 transitions. Word has length 37 [2021-06-06 00:29:17,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:29:17,039 INFO L482 AbstractCegarLoop]: Abstraction has 9857 states and 22786 transitions. [2021-06-06 00:29:17,039 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.1875) internal successors, (70), 32 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:17,039 INFO L276 IsEmpty]: Start isEmpty. Operand 9857 states and 22786 transitions. [2021-06-06 00:29:17,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-06 00:29:17,047 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:29:17,047 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:29:17,248 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2555,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:29:17,248 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:29:17,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:29:17,248 INFO L82 PathProgramCache]: Analyzing trace with hash -1157338053, now seen corresponding path program 154 times [2021-06-06 00:29:17,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:29:17,249 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973123535] [2021-06-06 00:29:17,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:29:17,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:29:17,609 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:29:17,609 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:29:17,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973123535] [2021-06-06 00:29:17,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973123535] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:29:17,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1817950332] [2021-06-06 00:29:17,609 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:29:17,640 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:29:17,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:29:17,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-06 00:29:17,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:29:18,354 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:29:18,354 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1817950332] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:29:18,354 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:29:18,354 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 17] total 35 [2021-06-06 00:29:18,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52281534] [2021-06-06 00:29:18,354 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-06 00:29:18,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:29:18,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-06 00:29:18,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1146, Unknown=0, NotChecked=0, Total=1260 [2021-06-06 00:29:18,355 INFO L87 Difference]: Start difference. First operand 9857 states and 22786 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) [2021-06-06 00:29:24,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:29:24,343 INFO L93 Difference]: Finished difference Result 14288 states and 32546 transitions. [2021-06-06 00:29:24,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2021-06-06 00:29:24,344 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 37 [2021-06-06 00:29:24,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:29:24,358 INFO L225 Difference]: With dead ends: 14288 [2021-06-06 00:29:24,358 INFO L226 Difference]: Without dead ends: 14228 [2021-06-06 00:29:24,359 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4640 ImplicationChecksByTransitivity, 5306.5ms TimeCoverageRelationStatistics Valid=1717, Invalid=13289, Unknown=0, NotChecked=0, Total=15006 [2021-06-06 00:29:24,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14228 states. [2021-06-06 00:29:24,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14228 to 10307. [2021-06-06 00:29:24,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10307 states, 10306 states have (on average 2.3123423248593054) internal successors, (23831), 10306 states have internal predecessors, (23831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:24,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10307 states to 10307 states and 23831 transitions. [2021-06-06 00:29:24,496 INFO L78 Accepts]: Start accepts. Automaton has 10307 states and 23831 transitions. Word has length 37 [2021-06-06 00:29:24,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:29:24,496 INFO L482 AbstractCegarLoop]: Abstraction has 10307 states and 23831 transitions. [2021-06-06 00:29:24,496 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) [2021-06-06 00:29:24,496 INFO L276 IsEmpty]: Start isEmpty. Operand 10307 states and 23831 transitions. [2021-06-06 00:29:24,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-06 00:29:24,505 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:29:24,505 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:29:24,705 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2563 [2021-06-06 00:29:24,705 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:29:24,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:29:24,706 INFO L82 PathProgramCache]: Analyzing trace with hash -1911324613, now seen corresponding path program 155 times [2021-06-06 00:29:24,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:29:24,706 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857309795] [2021-06-06 00:29:24,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:29:24,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:29:24,982 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 2 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:29:24,983 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:29:24,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857309795] [2021-06-06 00:29:24,983 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857309795] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:29:24,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [613843400] [2021-06-06 00:29:24,983 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:29:25,011 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-06 00:29:25,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:29:25,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-06 00:29:25,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:29:25,403 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:29:25,403 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [613843400] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:29:25,403 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:29:25,403 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 14] total 31 [2021-06-06 00:29:25,403 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437149107] [2021-06-06 00:29:25,403 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-06 00:29:25,403 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:29:25,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-06 00:29:25,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=829, Unknown=0, NotChecked=0, Total=930 [2021-06-06 00:29:25,404 INFO L87 Difference]: Start difference. First operand 10307 states and 23831 transitions. Second operand has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 31 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:28,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:29:28,500 INFO L93 Difference]: Finished difference Result 14681 states and 33701 transitions. [2021-06-06 00:29:28,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-06 00:29:28,500 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 31 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-06 00:29:28,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:29:28,515 INFO L225 Difference]: With dead ends: 14681 [2021-06-06 00:29:28,515 INFO L226 Difference]: Without dead ends: 14530 [2021-06-06 00:29:28,516 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2161 ImplicationChecksByTransitivity, 2731.2ms TimeCoverageRelationStatistics Valid=1147, Invalid=6685, Unknown=0, NotChecked=0, Total=7832 [2021-06-06 00:29:28,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14530 states. [2021-06-06 00:29:28,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14530 to 10928. [2021-06-06 00:29:28,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10928 states, 10927 states have (on average 2.315914706689851) internal successors, (25306), 10927 states have internal predecessors, (25306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:28,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10928 states to 10928 states and 25306 transitions. [2021-06-06 00:29:28,653 INFO L78 Accepts]: Start accepts. Automaton has 10928 states and 25306 transitions. Word has length 37 [2021-06-06 00:29:28,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:29:28,653 INFO L482 AbstractCegarLoop]: Abstraction has 10928 states and 25306 transitions. [2021-06-06 00:29:28,653 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 31 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:28,654 INFO L276 IsEmpty]: Start isEmpty. Operand 10928 states and 25306 transitions. [2021-06-06 00:29:28,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-06 00:29:28,663 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:29:28,663 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:29:28,863 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 156 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2584 [2021-06-06 00:29:28,863 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:29:28,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:29:28,864 INFO L82 PathProgramCache]: Analyzing trace with hash 855717531, now seen corresponding path program 156 times [2021-06-06 00:29:28,864 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:29:28,864 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886321098] [2021-06-06 00:29:28,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:29:28,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:29:29,105 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:29:29,105 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:29:29,105 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886321098] [2021-06-06 00:29:29,105 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886321098] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:29:29,105 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643370609] [2021-06-06 00:29:29,105 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:29:29,136 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-06 00:29:29,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:29:29,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-06 00:29:29,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:29:29,840 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:29:29,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1643370609] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:29:29,841 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:29:29,841 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 36 [2021-06-06 00:29:29,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642476411] [2021-06-06 00:29:29,841 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-06 00:29:29,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:29:29,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-06 00:29:29,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=1165, Unknown=0, NotChecked=0, Total=1332 [2021-06-06 00:29:29,841 INFO L87 Difference]: Start difference. First operand 10928 states and 25306 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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) [2021-06-06 00:29:32,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:29:32,019 INFO L93 Difference]: Finished difference Result 14325 states and 32936 transitions. [2021-06-06 00:29:32,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-06 00:29:32,020 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 39 [2021-06-06 00:29:32,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:29:32,034 INFO L225 Difference]: With dead ends: 14325 [2021-06-06 00:29:32,034 INFO L226 Difference]: Without dead ends: 14232 [2021-06-06 00:29:32,035 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1923 ImplicationChecksByTransitivity, 2092.7ms TimeCoverageRelationStatistics Valid=872, Invalid=5448, Unknown=0, NotChecked=0, Total=6320 [2021-06-06 00:29:32,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14232 states. [2021-06-06 00:29:32,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14232 to 11014. [2021-06-06 00:29:32,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11014 states, 11013 states have (on average 2.315990193407791) internal successors, (25506), 11013 states have internal predecessors, (25506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:32,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11014 states to 11014 states and 25506 transitions. [2021-06-06 00:29:32,233 INFO L78 Accepts]: Start accepts. Automaton has 11014 states and 25506 transitions. Word has length 39 [2021-06-06 00:29:32,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:29:32,233 INFO L482 AbstractCegarLoop]: Abstraction has 11014 states and 25506 transitions. [2021-06-06 00:29:32,233 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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) [2021-06-06 00:29:32,233 INFO L276 IsEmpty]: Start isEmpty. Operand 11014 states and 25506 transitions. [2021-06-06 00:29:32,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-06 00:29:32,242 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:29:32,242 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:29:32,442 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2593,157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:29:32,443 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:29:32,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:29:32,443 INFO L82 PathProgramCache]: Analyzing trace with hash 367286253, now seen corresponding path program 157 times [2021-06-06 00:29:32,443 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:29:32,443 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298192351] [2021-06-06 00:29:32,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:29:32,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:29:32,703 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:29:32,703 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:29:32,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298192351] [2021-06-06 00:29:32,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [298192351] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:29:32,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [674044141] [2021-06-06 00:29:32,703 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:29:32,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:29:32,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-06 00:29:32,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:29:33,371 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:29:33,372 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [674044141] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:29:33,372 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:29:33,372 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 36 [2021-06-06 00:29:33,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211519958] [2021-06-06 00:29:33,372 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-06 00:29:33,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:29:33,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-06 00:29:33,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=1176, Unknown=0, NotChecked=0, Total=1332 [2021-06-06 00:29:33,373 INFO L87 Difference]: Start difference. First operand 11014 states and 25506 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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) [2021-06-06 00:29:35,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:29:35,542 INFO L93 Difference]: Finished difference Result 14246 states and 32789 transitions. [2021-06-06 00:29:35,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-06 00:29:35,542 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 39 [2021-06-06 00:29:35,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:29:35,555 INFO L225 Difference]: With dead ends: 14246 [2021-06-06 00:29:35,555 INFO L226 Difference]: Without dead ends: 14165 [2021-06-06 00:29:35,555 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1693 ImplicationChecksByTransitivity, 1968.9ms TimeCoverageRelationStatistics Valid=732, Invalid=4818, Unknown=0, NotChecked=0, Total=5550 [2021-06-06 00:29:35,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14165 states. [2021-06-06 00:29:35,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14165 to 11038. [2021-06-06 00:29:35,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11038 states, 11037 states have (on average 2.315484280148591) internal successors, (25556), 11037 states have internal predecessors, (25556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:35,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11038 states to 11038 states and 25556 transitions. [2021-06-06 00:29:35,687 INFO L78 Accepts]: Start accepts. Automaton has 11038 states and 25556 transitions. Word has length 39 [2021-06-06 00:29:35,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:29:35,687 INFO L482 AbstractCegarLoop]: Abstraction has 11038 states and 25556 transitions. [2021-06-06 00:29:35,687 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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) [2021-06-06 00:29:35,688 INFO L276 IsEmpty]: Start isEmpty. Operand 11038 states and 25556 transitions. [2021-06-06 00:29:35,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-06 00:29:35,697 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:29:35,697 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:29:35,897 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2615,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:29:35,898 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:29:35,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:29:35,898 INFO L82 PathProgramCache]: Analyzing trace with hash 2065380333, now seen corresponding path program 158 times [2021-06-06 00:29:35,898 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:29:35,898 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022324392] [2021-06-06 00:29:35,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:29:35,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:29:36,137 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:29:36,137 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:29:36,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022324392] [2021-06-06 00:29:36,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022324392] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:29:36,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318966371] [2021-06-06 00:29:36,137 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 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 [2021-06-06 00:29:36,162 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:29:36,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:29:36,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-06 00:29:36,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:29:36,811 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:29:36,811 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1318966371] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:29:36,811 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:29:36,811 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 36 [2021-06-06 00:29:36,811 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518517459] [2021-06-06 00:29:36,811 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-06 00:29:36,811 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:29:36,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-06 00:29:36,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=1192, Unknown=0, NotChecked=0, Total=1332 [2021-06-06 00:29:36,812 INFO L87 Difference]: Start difference. First operand 11038 states and 25556 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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) [2021-06-06 00:29:39,260 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 23 [2021-06-06 00:29:39,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:29:39,962 INFO L93 Difference]: Finished difference Result 14589 states and 33530 transitions. [2021-06-06 00:29:39,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-06 00:29:39,963 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 39 [2021-06-06 00:29:39,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:29:39,977 INFO L225 Difference]: With dead ends: 14589 [2021-06-06 00:29:39,978 INFO L226 Difference]: Without dead ends: 14547 [2021-06-06 00:29:39,978 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2420 ImplicationChecksByTransitivity, 2884.3ms TimeCoverageRelationStatistics Valid=1213, Invalid=6797, Unknown=0, NotChecked=0, Total=8010 [2021-06-06 00:29:39,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14547 states. [2021-06-06 00:29:40,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14547 to 11114. [2021-06-06 00:29:40,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11114 states, 11113 states have (on average 2.315666336722757) internal successors, (25734), 11113 states have internal predecessors, (25734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:40,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11114 states to 11114 states and 25734 transitions. [2021-06-06 00:29:40,120 INFO L78 Accepts]: Start accepts. Automaton has 11114 states and 25734 transitions. Word has length 39 [2021-06-06 00:29:40,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:29:40,120 INFO L482 AbstractCegarLoop]: Abstraction has 11114 states and 25734 transitions. [2021-06-06 00:29:40,120 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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) [2021-06-06 00:29:40,121 INFO L276 IsEmpty]: Start isEmpty. Operand 11114 states and 25734 transitions. [2021-06-06 00:29:40,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-06 00:29:40,130 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:29:40,130 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:29:40,330 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2637 [2021-06-06 00:29:40,331 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:29:40,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:29:40,331 INFO L82 PathProgramCache]: Analyzing trace with hash 1136965671, now seen corresponding path program 159 times [2021-06-06 00:29:40,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:29:40,331 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483056144] [2021-06-06 00:29:40,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:29:40,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:29:40,604 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:29:40,604 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:29:40,604 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483056144] [2021-06-06 00:29:40,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483056144] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:29:40,604 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1584108998] [2021-06-06 00:29:40,604 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 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 [2021-06-06 00:29:40,631 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-06 00:29:40,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:29:40,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-06 00:29:40,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:29:41,360 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:29:41,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1584108998] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:29:41,360 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:29:41,360 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 36 [2021-06-06 00:29:41,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723653824] [2021-06-06 00:29:41,360 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-06 00:29:41,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:29:41,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-06 00:29:41,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=1187, Unknown=0, NotChecked=0, Total=1332 [2021-06-06 00:29:41,361 INFO L87 Difference]: Start difference. First operand 11114 states and 25734 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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) [2021-06-06 00:29:43,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:29:43,942 INFO L93 Difference]: Finished difference Result 14390 states and 33112 transitions. [2021-06-06 00:29:43,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-06 00:29:43,942 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 39 [2021-06-06 00:29:43,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:29:43,957 INFO L225 Difference]: With dead ends: 14390 [2021-06-06 00:29:43,957 INFO L226 Difference]: Without dead ends: 14297 [2021-06-06 00:29:43,958 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1847 ImplicationChecksByTransitivity, 2419.5ms TimeCoverageRelationStatistics Valid=852, Invalid=5468, Unknown=0, NotChecked=0, Total=6320 [2021-06-06 00:29:43,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14297 states. [2021-06-06 00:29:44,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14297 to 11118. [2021-06-06 00:29:44,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11118 states, 11117 states have (on average 2.3155527570387693) internal successors, (25742), 11117 states have internal predecessors, (25742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:44,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11118 states to 11118 states and 25742 transitions. [2021-06-06 00:29:44,146 INFO L78 Accepts]: Start accepts. Automaton has 11118 states and 25742 transitions. Word has length 39 [2021-06-06 00:29:44,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:29:44,146 INFO L482 AbstractCegarLoop]: Abstraction has 11118 states and 25742 transitions. [2021-06-06 00:29:44,146 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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) [2021-06-06 00:29:44,146 INFO L276 IsEmpty]: Start isEmpty. Operand 11118 states and 25742 transitions. [2021-06-06 00:29:44,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-06 00:29:44,156 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:29:44,156 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:29:44,356 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2660,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:29:44,356 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:29:44,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:29:44,357 INFO L82 PathProgramCache]: Analyzing trace with hash -1459907545, now seen corresponding path program 160 times [2021-06-06 00:29:44,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:29:44,357 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561926756] [2021-06-06 00:29:44,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:29:44,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:29:44,617 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:29:44,617 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:29:44,617 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561926756] [2021-06-06 00:29:44,617 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561926756] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:29:44,617 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1662933071] [2021-06-06 00:29:44,617 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 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 [2021-06-06 00:29:44,645 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:29:44,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:29:44,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-06 00:29:44,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:29:45,416 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:29:45,416 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1662933071] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:29:45,416 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:29:45,416 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 36 [2021-06-06 00:29:45,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284166339] [2021-06-06 00:29:45,417 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-06 00:29:45,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:29:45,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-06 00:29:45,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=1199, Unknown=0, NotChecked=0, Total=1332 [2021-06-06 00:29:45,417 INFO L87 Difference]: Start difference. First operand 11118 states and 25742 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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) [2021-06-06 00:29:48,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:29:48,824 INFO L93 Difference]: Finished difference Result 14835 states and 34081 transitions. [2021-06-06 00:29:48,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-06-06 00:29:48,824 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 39 [2021-06-06 00:29:48,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:29:48,838 INFO L225 Difference]: With dead ends: 14835 [2021-06-06 00:29:48,839 INFO L226 Difference]: Without dead ends: 14793 [2021-06-06 00:29:48,839 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2604 ImplicationChecksByTransitivity, 3233.0ms TimeCoverageRelationStatistics Valid=1393, Invalid=7349, Unknown=0, NotChecked=0, Total=8742 [2021-06-06 00:29:48,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14793 states. [2021-06-06 00:29:48,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14793 to 11122. [2021-06-06 00:29:48,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11122 states, 11121 states have (on average 2.315439259059437) internal successors, (25750), 11121 states have internal predecessors, (25750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:48,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11122 states to 11122 states and 25750 transitions. [2021-06-06 00:29:48,986 INFO L78 Accepts]: Start accepts. Automaton has 11122 states and 25750 transitions. Word has length 39 [2021-06-06 00:29:48,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:29:48,986 INFO L482 AbstractCegarLoop]: Abstraction has 11122 states and 25750 transitions. [2021-06-06 00:29:48,986 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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) [2021-06-06 00:29:48,986 INFO L276 IsEmpty]: Start isEmpty. Operand 11122 states and 25750 transitions. [2021-06-06 00:29:48,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-06 00:29:48,996 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:29:48,996 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:29:49,196 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2684 [2021-06-06 00:29:49,196 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:29:49,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:29:49,197 INFO L82 PathProgramCache]: Analyzing trace with hash 1198285931, now seen corresponding path program 161 times [2021-06-06 00:29:49,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:29:49,197 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500346158] [2021-06-06 00:29:49,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:29:49,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:29:49,439 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:29:49,440 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:29:49,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500346158] [2021-06-06 00:29:49,440 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [500346158] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:29:49,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612864932] [2021-06-06 00:29:49,440 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 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 [2021-06-06 00:29:49,466 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-06 00:29:49,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:29:49,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-06 00:29:49,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:29:50,230 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:29:50,230 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1612864932] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:29:50,230 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:29:50,230 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 36 [2021-06-06 00:29:50,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167600316] [2021-06-06 00:29:50,230 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-06 00:29:50,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:29:50,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-06 00:29:50,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=1197, Unknown=0, NotChecked=0, Total=1332 [2021-06-06 00:29:50,231 INFO L87 Difference]: Start difference. First operand 11122 states and 25750 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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) [2021-06-06 00:29:54,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:29:54,661 INFO L93 Difference]: Finished difference Result 15432 states and 35365 transitions. [2021-06-06 00:29:54,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-06-06 00:29:54,661 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 39 [2021-06-06 00:29:54,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:29:54,677 INFO L225 Difference]: With dead ends: 15432 [2021-06-06 00:29:54,677 INFO L226 Difference]: Without dead ends: 15390 [2021-06-06 00:29:54,678 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4288 ImplicationChecksByTransitivity, 4099.5ms TimeCoverageRelationStatistics Valid=1894, Invalid=10762, Unknown=0, NotChecked=0, Total=12656 [2021-06-06 00:29:54,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15390 states. [2021-06-06 00:29:54,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15390 to 11226. [2021-06-06 00:29:54,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11226 states, 11225 states have (on average 2.31554565701559) internal successors, (25992), 11225 states have internal predecessors, (25992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:54,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11226 states to 11226 states and 25992 transitions. [2021-06-06 00:29:54,831 INFO L78 Accepts]: Start accepts. Automaton has 11226 states and 25992 transitions. Word has length 39 [2021-06-06 00:29:54,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:29:54,831 INFO L482 AbstractCegarLoop]: Abstraction has 11226 states and 25992 transitions. [2021-06-06 00:29:54,831 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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) [2021-06-06 00:29:54,831 INFO L276 IsEmpty]: Start isEmpty. Operand 11226 states and 25992 transitions. [2021-06-06 00:29:54,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-06 00:29:54,841 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:29:54,841 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:29:55,052 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2705,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:29:55,053 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:29:55,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:29:55,053 INFO L82 PathProgramCache]: Analyzing trace with hash -1315146321, now seen corresponding path program 162 times [2021-06-06 00:29:55,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:29:55,053 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142431979] [2021-06-06 00:29:55,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:29:55,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:29:55,295 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:29:55,295 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:29:55,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142431979] [2021-06-06 00:29:55,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142431979] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:29:55,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457186445] [2021-06-06 00:29:55,295 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 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 [2021-06-06 00:29:55,322 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-06 00:29:55,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:29:55,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-06 00:29:55,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:29:56,091 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:29:56,091 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [457186445] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:29:56,092 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:29:56,092 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 36 [2021-06-06 00:29:56,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989122824] [2021-06-06 00:29:56,092 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-06 00:29:56,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:29:56,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-06 00:29:56,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=1194, Unknown=0, NotChecked=0, Total=1332 [2021-06-06 00:29:56,092 INFO L87 Difference]: Start difference. First operand 11226 states and 25992 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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) [2021-06-06 00:30:01,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:30:01,059 INFO L93 Difference]: Finished difference Result 15857 states and 36251 transitions. [2021-06-06 00:30:01,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2021-06-06 00:30:01,060 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 39 [2021-06-06 00:30:01,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:30:01,074 INFO L225 Difference]: With dead ends: 15857 [2021-06-06 00:30:01,074 INFO L226 Difference]: Without dead ends: 15815 [2021-06-06 00:30:01,075 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5462 ImplicationChecksByTransitivity, 4447.8ms TimeCoverageRelationStatistics Valid=2226, Invalid=13274, Unknown=0, NotChecked=0, Total=15500 [2021-06-06 00:30:01,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15815 states. [2021-06-06 00:30:01,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15815 to 11354. [2021-06-06 00:30:01,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11354 states, 11353 states have (on average 2.3170968026072405) internal successors, (26306), 11353 states have internal predecessors, (26306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:30:01,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11354 states to 11354 states and 26306 transitions. [2021-06-06 00:30:01,216 INFO L78 Accepts]: Start accepts. Automaton has 11354 states and 26306 transitions. Word has length 39 [2021-06-06 00:30:01,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:30:01,216 INFO L482 AbstractCegarLoop]: Abstraction has 11354 states and 26306 transitions. [2021-06-06 00:30:01,217 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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) [2021-06-06 00:30:01,217 INFO L276 IsEmpty]: Start isEmpty. Operand 11354 states and 26306 transitions. [2021-06-06 00:30:01,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-06 00:30:01,225 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:30:01,225 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:30:01,426 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2731 [2021-06-06 00:30:01,426 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:30:01,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:30:01,426 INFO L82 PathProgramCache]: Analyzing trace with hash -1603794957, now seen corresponding path program 163 times [2021-06-06 00:30:01,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:30:01,426 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690596583] [2021-06-06 00:30:01,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:30:01,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:30:01,754 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:30:01,754 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:30:01,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690596583] [2021-06-06 00:30:01,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690596583] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:30:01,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524807088] [2021-06-06 00:30:01,755 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 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 [2021-06-06 00:30:01,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:30:01,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-06 00:30:01,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:30:02,657 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:30:02,658 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1524807088] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:30:02,658 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:30:02,658 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 36 [2021-06-06 00:30:02,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377439450] [2021-06-06 00:30:02,658 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-06 00:30:02,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:30:02,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-06 00:30:02,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1190, Unknown=0, NotChecked=0, Total=1332 [2021-06-06 00:30:02,658 INFO L87 Difference]: Start difference. First operand 11354 states and 26306 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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) [2021-06-06 00:30:08,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:30:08,597 INFO L93 Difference]: Finished difference Result 16704 states and 38033 transitions. [2021-06-06 00:30:08,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2021-06-06 00:30:08,597 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 39 [2021-06-06 00:30:08,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:30:08,614 INFO L225 Difference]: With dead ends: 16704 [2021-06-06 00:30:08,614 INFO L226 Difference]: Without dead ends: 16655 [2021-06-06 00:30:08,615 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6247 ImplicationChecksByTransitivity, 5369.1ms TimeCoverageRelationStatistics Valid=2587, Invalid=15235, Unknown=0, NotChecked=0, Total=17822 [2021-06-06 00:30:08,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16655 states. [2021-06-06 00:30:08,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16655 to 11527. [2021-06-06 00:30:08,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11527 states, 11526 states have (on average 2.318931112267916) internal successors, (26728), 11526 states have internal predecessors, (26728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:30:08,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11527 states to 11527 states and 26728 transitions. [2021-06-06 00:30:08,785 INFO L78 Accepts]: Start accepts. Automaton has 11527 states and 26728 transitions. Word has length 39 [2021-06-06 00:30:08,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:30:08,785 INFO L482 AbstractCegarLoop]: Abstraction has 11527 states and 26728 transitions. [2021-06-06 00:30:08,786 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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) [2021-06-06 00:30:08,786 INFO L276 IsEmpty]: Start isEmpty. Operand 11527 states and 26728 transitions. [2021-06-06 00:30:08,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-06 00:30:08,798 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:30:08,798 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:30:09,012 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2755 [2021-06-06 00:30:09,013 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:30:09,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:30:09,013 INFO L82 PathProgramCache]: Analyzing trace with hash -692364489, now seen corresponding path program 164 times [2021-06-06 00:30:09,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:30:09,013 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299573905] [2021-06-06 00:30:09,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:30:09,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:30:09,328 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:30:09,328 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:30:09,328 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299573905] [2021-06-06 00:30:09,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299573905] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:30:09,328 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [129299066] [2021-06-06 00:30:09,328 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 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 [2021-06-06 00:30:09,354 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:30:09,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:30:09,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-06 00:30:09,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... Received shutdown request... [2021-06-06 00:31:21,203 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2777 [2021-06-06 00:31:21,204 WARN L547 AbstractCegarLoop]: Verification canceled [2021-06-06 00:31:21,205 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-06 00:31:21,207 WARN L196 ceAbstractionStarter]: Timeout [2021-06-06 00:31:21,207 INFO L202 PluginConnector]: Adding new model nonblocking-counter-alt2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.06 12:31:21 BasicIcfg [2021-06-06 00:31:21,207 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-06 00:31:21,207 INFO L168 Benchmark]: Toolchain (without parser) took 746843.34 ms. Allocated memory was 341.8 MB in the beginning and 3.4 GB in the end (delta: 3.0 GB). Free memory was 321.4 MB in the beginning and 1.3 GB in the end (delta: -969.3 MB). Peak memory consumption was 2.1 GB. Max. memory is 16.0 GB. [2021-06-06 00:31:21,207 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 341.8 MB. Free memory is still 322.5 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-06-06 00:31:21,207 INFO L168 Benchmark]: Boogie Procedure Inliner took 27.00 ms. Allocated memory is still 341.8 MB. Free memory was 321.3 MB in the beginning and 319.9 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-06 00:31:21,208 INFO L168 Benchmark]: Boogie Preprocessor took 13.47 ms. Allocated memory is still 341.8 MB. Free memory was 319.9 MB in the beginning and 318.9 MB in the end (delta: 934.3 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-06 00:31:21,208 INFO L168 Benchmark]: RCFGBuilder took 277.88 ms. Allocated memory is still 341.8 MB. Free memory was 318.9 MB in the beginning and 307.5 MB in the end (delta: 11.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.0 GB. [2021-06-06 00:31:21,208 INFO L168 Benchmark]: TraceAbstraction took 746520.48 ms. Allocated memory was 341.8 MB in the beginning and 3.4 GB in the end (delta: 3.0 GB). Free memory was 307.0 MB in the beginning and 1.3 GB in the end (delta: -983.8 MB). Peak memory consumption was 2.1 GB. Max. memory is 16.0 GB. [2021-06-06 00:31:21,208 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 0.12 ms. Allocated memory is still 341.8 MB. Free memory is still 322.5 MB. There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 27.00 ms. Allocated memory is still 341.8 MB. Free memory was 321.3 MB in the beginning and 319.9 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 13.47 ms. Allocated memory is still 341.8 MB. Free memory was 319.9 MB in the beginning and 318.9 MB in the end (delta: 934.3 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 277.88 ms. Allocated memory is still 341.8 MB. Free memory was 318.9 MB in the beginning and 307.5 MB in the end (delta: 11.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.0 GB. * TraceAbstraction took 746520.48 ms. Allocated memory was 341.8 MB in the beginning and 3.4 GB in the end (delta: 3.0 GB). Free memory was 307.0 MB in the beginning and 1.3 GB in the end (delta: -983.8 MB). Peak memory consumption was 2.1 GB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 51]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was analyzing trace of length 40 with TraceHistMax 6,while TraceCheckSpWp was constructing forward predicates,while ExplicitLhsPolynomialRelations was build 0 of 1 xjuncts. - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 5 procedures, 32 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 746390.8ms, OverallIterations: 166, TraceHistogramMax: 6, EmptinessCheckTime: 627.9ms, AutomataDifference: 497928.7ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 15.8ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 6393 SDtfs, 47769 SDslu, 100866 SDs, 0 SdLazy, 260600 SolverSat, 16320 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 103399.1ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 17246 GetRequests, 3255 SyntacticMatches, 191 SemanticMatches, 13800 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 454627 ImplicationChecksByTransitivity, 467346.5ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=11527occurred in iteration=165, InterpolantAutomatonStates: 10321, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 8128.7ms AutomataMinimizationTime, 165 MinimizatonAttempts, 212945 StatesRemovedByMinimization, 165 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 533.2ms SsaConstructionTime, 2256.4ms SatisfiabilityAnalysisTime, 127897.7ms InterpolantComputationTime, 11094 NumberOfCodeBlocks, 11094 NumberOfCodeBlocksAsserted, 771 NumberOfCheckSat, 10766 ConstructedInterpolants, 0 QuantifiedInterpolants, 179406 SizeOfPredicates, 718 NumberOfNonLiveVariables, 12442 ConjunctsInSsa, 5374 ConjunctsInUnsatCore, 328 InterpolantComputations, 2 PerfectInterpolantSequences, 505/15371 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