/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/mult-equiv.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-29289db [2021-06-05 05:37:43,890 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 05:37:43,892 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 05:37:43,929 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-05 05:37:43,983 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-06-05 05:37:44,019 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 05:37:44,020 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 05:37:44,020 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 05:37:44,020 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 05:37:44,022 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 05:37:44,023 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 05:37:44,023 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 05:37:44,023 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 05:37:44,023 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 05:37:44,023 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 05:37:44,024 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 05:37:44,024 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 05:37:44,024 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 05:37:44,024 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 05:37:44,025 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 05:37:44,025 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 05:37:44,025 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 05:37:44,025 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 05:37:44,025 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 05:37:44,025 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 05:37:44,025 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 05:37:44,025 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 05:37:44,026 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 05:37:44,026 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 05:37:44,026 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 05:37:44,026 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 05:37:44,026 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 05:37:44,026 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 05:37:44,026 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 05:37:44,026 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 05:37:44,027 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 05:37:44,027 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 05:37:44,320 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 05:37:44,336 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 05:37:44,338 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 05:37:44,339 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-05 05:37:44,340 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-05 05:37:44,341 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/mult-equiv.wvr.bpl [2021-06-05 05:37:44,341 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/mult-equiv.wvr.bpl' [2021-06-05 05:37:44,609 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 05:37:44,610 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-05 05:37:44,612 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 05:37:44,612 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 05:37:44,612 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 05:37:44,626 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "mult-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:37:44" (1/1) ... [2021-06-05 05:37:44,632 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "mult-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:37:44" (1/1) ... [2021-06-05 05:37:44,639 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 05:37:44,641 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 05:37:44,641 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 05:37:44,642 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 05:37:44,648 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "mult-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:37:44" (1/1) ... [2021-06-05 05:37:44,648 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "mult-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:37:44" (1/1) ... [2021-06-05 05:37:44,649 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "mult-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:37:44" (1/1) ... [2021-06-05 05:37:44,649 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "mult-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:37:44" (1/1) ... [2021-06-05 05:37:44,652 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "mult-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:37:44" (1/1) ... [2021-06-05 05:37:44,654 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "mult-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:37:44" (1/1) ... [2021-06-05 05:37:44,654 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "mult-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:37:44" (1/1) ... [2021-06-05 05:37:44,655 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 05:37:44,656 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 05:37:44,656 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 05:37:44,656 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 05:37:44,657 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "mult-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:37:44" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 05:37:44,743 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-05 05:37:44,743 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-05 05:37:44,744 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-05 05:37:44,744 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-05 05:37:44,744 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-05 05:37:44,744 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-05 05:37:44,744 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-05 05:37:44,744 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 05:37:44,744 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 05:37:44,745 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-06-05 05:37:44,745 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-06-05 05:37:44,745 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-06-05 05:37:44,746 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-05 05:37:44,898 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 05:37:44,898 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-05 05:37:44,899 INFO L202 PluginConnector]: Adding new model mult-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 05:37:44 BoogieIcfgContainer [2021-06-05 05:37:44,900 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 05:37:44,901 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 05:37:44,901 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 05:37:44,903 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 05:37:44,904 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "mult-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:37:44" (1/2) ... [2021-06-05 05:37:44,904 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@419baf4f and model type mult-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 05:37:44, skipping insertion in model container [2021-06-05 05:37:44,904 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "mult-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 05:37:44" (2/2) ... [2021-06-05 05:37:44,905 INFO L111 eAbstractionObserver]: Analyzing ICFG mult-equiv.wvr.bpl [2021-06-05 05:37:44,910 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 05:37:44,910 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 05:37:44,911 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 05:37:44,911 INFO L510 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 05:37:44,939 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-06-05 05:37:44,954 INFO L255 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-06-05 05:37:44,969 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 05:37:44,969 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 05:37:44,970 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 05:37:44,970 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 05:37:44,970 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 05:37:44,970 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 05:37:44,980 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 05:37:44,981 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-05 05:37:44,988 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 33 places, 26 transitions, 76 flow [2021-06-05 05:37:45,009 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 111 states, 109 states have (on average 2.853211009174312) internal successors, (311), 110 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:37:45,011 INFO L276 IsEmpty]: Start isEmpty. Operand has 111 states, 109 states have (on average 2.853211009174312) internal successors, (311), 110 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:37:45,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 05:37:45,017 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:37:45,018 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:37:45,018 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:37:45,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:37:45,022 INFO L82 PathProgramCache]: Analyzing trace with hash -2116175235, now seen corresponding path program 1 times [2021-06-05 05:37:45,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:37:45,029 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578878373] [2021-06-05 05:37:45,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:37:45,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:37:45,206 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:37:45,207 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:37:45,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578878373] [2021-06-05 05:37:45,207 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578878373] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 05:37:45,208 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 05:37:45,208 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-05 05:37:45,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416664957] [2021-06-05 05:37:45,211 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 05:37:45,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:37:45,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 05:37:45,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 05:37:45,243 INFO L87 Difference]: Start difference. First operand has 111 states, 109 states have (on average 2.853211009174312) internal successors, (311), 110 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:37:45,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:37:45,302 INFO L93 Difference]: Finished difference Result 214 states and 614 transitions. [2021-06-05 05:37:45,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 05:37:45,303 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 05:37:45,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:37:45,314 INFO L225 Difference]: With dead ends: 214 [2021-06-05 05:37:45,315 INFO L226 Difference]: Without dead ends: 199 [2021-06-05 05:37:45,316 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 35.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 05:37:45,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-06-05 05:37:45,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 146. [2021-06-05 05:37:45,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 2.8689655172413793) internal successors, (416), 145 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:37:45,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 416 transitions. [2021-06-05 05:37:45,388 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 416 transitions. Word has length 15 [2021-06-05 05:37:45,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:37:45,388 INFO L482 AbstractCegarLoop]: Abstraction has 146 states and 416 transitions. [2021-06-05 05:37:45,389 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:37:45,389 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 416 transitions. [2021-06-05 05:37:45,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 05:37:45,390 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:37:45,391 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:37:45,391 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 05:37:45,391 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:37:45,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:37:45,392 INFO L82 PathProgramCache]: Analyzing trace with hash 655800031, now seen corresponding path program 1 times [2021-06-05 05:37:45,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:37:45,392 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921116929] [2021-06-05 05:37:45,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:37:45,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:37:45,499 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:37:45,499 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:37:45,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921116929] [2021-06-05 05:37:45,500 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921116929] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:37:45,500 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1331763242] [2021-06-05 05:37:45,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:37:45,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:37:45,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 3 conjunts are in the unsatisfiable core [2021-06-05 05:37:45,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:37:45,623 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:37:45,623 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1331763242] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:37:45,623 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:37:45,624 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 5 [2021-06-05 05:37:45,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919528040] [2021-06-05 05:37:45,625 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 05:37:45,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:37:45,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 05:37:45,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-06-05 05:37:45,626 INFO L87 Difference]: Start difference. First operand 146 states and 416 transitions. Second operand has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:37:45,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:37:45,703 INFO L93 Difference]: Finished difference Result 365 states and 1020 transitions. [2021-06-05 05:37:45,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 05:37:45,703 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 05:37:45,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:37:45,707 INFO L225 Difference]: With dead ends: 365 [2021-06-05 05:37:45,707 INFO L226 Difference]: Without dead ends: 365 [2021-06-05 05:37:45,707 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 49.4ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 05:37:45,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2021-06-05 05:37:45,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 179. [2021-06-05 05:37:45,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 178 states have (on average 3.00561797752809) internal successors, (535), 178 states have internal predecessors, (535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:37:45,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 535 transitions. [2021-06-05 05:37:45,723 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 535 transitions. Word has length 17 [2021-06-05 05:37:45,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:37:45,724 INFO L482 AbstractCegarLoop]: Abstraction has 179 states and 535 transitions. [2021-06-05 05:37:45,724 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:37:45,724 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 535 transitions. [2021-06-05 05:37:45,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 05:37:45,726 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:37:45,726 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:37:45,948 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-06-05 05:37:45,949 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:37:45,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:37:45,950 INFO L82 PathProgramCache]: Analyzing trace with hash -2126444319, now seen corresponding path program 1 times [2021-06-05 05:37:45,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:37:45,950 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094501672] [2021-06-05 05:37:45,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:37:45,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:37:46,001 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:37:46,001 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:37:46,002 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094501672] [2021-06-05 05:37:46,002 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094501672] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 05:37:46,005 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 05:37:46,005 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 05:37:46,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859469978] [2021-06-05 05:37:46,006 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 05:37:46,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:37:46,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 05:37:46,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-05 05:37:46,011 INFO L87 Difference]: Start difference. First operand 179 states and 535 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:37:46,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:37:46,061 INFO L93 Difference]: Finished difference Result 237 states and 680 transitions. [2021-06-05 05:37:46,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 05:37:46,065 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 05:37:46,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:37:46,070 INFO L225 Difference]: With dead ends: 237 [2021-06-05 05:37:46,070 INFO L226 Difference]: Without dead ends: 237 [2021-06-05 05:37:46,070 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.3ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-05 05:37:46,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2021-06-05 05:37:46,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 188. [2021-06-05 05:37:46,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 187 states have (on average 2.9893048128342246) internal successors, (559), 187 states have internal predecessors, (559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:37:46,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 559 transitions. [2021-06-05 05:37:46,092 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 559 transitions. Word has length 17 [2021-06-05 05:37:46,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:37:46,093 INFO L482 AbstractCegarLoop]: Abstraction has 188 states and 559 transitions. [2021-06-05 05:37:46,093 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:37:46,093 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 559 transitions. [2021-06-05 05:37:46,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 05:37:46,098 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:37:46,098 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:37:46,098 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-05 05:37:46,098 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:37:46,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:37:46,099 INFO L82 PathProgramCache]: Analyzing trace with hash 1369482973, now seen corresponding path program 2 times [2021-06-05 05:37:46,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:37:46,100 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294443275] [2021-06-05 05:37:46,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:37:46,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:37:46,159 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:37:46,160 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:37:46,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294443275] [2021-06-05 05:37:46,160 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294443275] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 05:37:46,160 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 05:37:46,160 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 05:37:46,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680266393] [2021-06-05 05:37:46,161 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 05:37:46,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:37:46,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 05:37:46,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 05:37:46,165 INFO L87 Difference]: Start difference. First operand 188 states and 559 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:37:46,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:37:46,223 INFO L93 Difference]: Finished difference Result 293 states and 808 transitions. [2021-06-05 05:37:46,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 05:37:46,223 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 05:37:46,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:37:46,225 INFO L225 Difference]: With dead ends: 293 [2021-06-05 05:37:46,225 INFO L226 Difference]: Without dead ends: 293 [2021-06-05 05:37:46,225 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 19.4ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 05:37:46,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2021-06-05 05:37:46,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 164. [2021-06-05 05:37:46,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 163 states have (on average 2.932515337423313) internal successors, (478), 163 states have internal predecessors, (478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:37:46,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 478 transitions. [2021-06-05 05:37:46,233 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 478 transitions. Word has length 17 [2021-06-05 05:37:46,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:37:46,234 INFO L482 AbstractCegarLoop]: Abstraction has 164 states and 478 transitions. [2021-06-05 05:37:46,234 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:37:46,234 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 478 transitions. [2021-06-05 05:37:46,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 05:37:46,235 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:37:46,235 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:37:46,235 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-05 05:37:46,235 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:37:46,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:37:46,236 INFO L82 PathProgramCache]: Analyzing trace with hash 984474203, now seen corresponding path program 1 times [2021-06-05 05:37:46,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:37:46,236 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610367303] [2021-06-05 05:37:46,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:37:46,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:37:46,341 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:37:46,341 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:37:46,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610367303] [2021-06-05 05:37:46,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610367303] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:37:46,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1039117332] [2021-06-05 05:37:46,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:37:46,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:37:46,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 3 conjunts are in the unsatisfiable core [2021-06-05 05:37:46,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:37:46,452 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:37:46,452 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1039117332] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:37:46,452 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:37:46,452 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 5 [2021-06-05 05:37:46,452 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982619759] [2021-06-05 05:37:46,453 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 05:37:46,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:37:46,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 05:37:46,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-06-05 05:37:46,454 INFO L87 Difference]: Start difference. First operand 164 states and 478 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:37:46,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:37:46,512 INFO L93 Difference]: Finished difference Result 348 states and 971 transitions. [2021-06-05 05:37:46,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 05:37:46,513 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 05:37:46,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:37:46,515 INFO L225 Difference]: With dead ends: 348 [2021-06-05 05:37:46,515 INFO L226 Difference]: Without dead ends: 348 [2021-06-05 05:37:46,515 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 26.7ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 05:37:46,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2021-06-05 05:37:46,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 170. [2021-06-05 05:37:46,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 169 states have (on average 2.964497041420118) internal successors, (501), 169 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:37:46,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 501 transitions. [2021-06-05 05:37:46,530 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 501 transitions. Word has length 17 [2021-06-05 05:37:46,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:37:46,531 INFO L482 AbstractCegarLoop]: Abstraction has 170 states and 501 transitions. [2021-06-05 05:37:46,531 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:37:46,532 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 501 transitions. [2021-06-05 05:37:46,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 05:37:46,535 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:37:46,535 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:37:46,759 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:37:46,760 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:37:46,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:37:46,760 INFO L82 PathProgramCache]: Analyzing trace with hash -427193509, now seen corresponding path program 3 times [2021-06-05 05:37:46,760 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:37:46,761 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951349927] [2021-06-05 05:37:46,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:37:46,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:37:46,784 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:37:46,784 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:37:46,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951349927] [2021-06-05 05:37:46,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951349927] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 05:37:46,786 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 05:37:46,788 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 05:37:46,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989545325] [2021-06-05 05:37:46,789 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 05:37:46,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:37:46,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 05:37:46,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 05:37:46,793 INFO L87 Difference]: Start difference. First operand 170 states and 501 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:37:46,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:37:46,832 INFO L93 Difference]: Finished difference Result 204 states and 542 transitions. [2021-06-05 05:37:46,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 05:37:46,833 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 05:37:46,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:37:46,834 INFO L225 Difference]: With dead ends: 204 [2021-06-05 05:37:46,834 INFO L226 Difference]: Without dead ends: 174 [2021-06-05 05:37:46,834 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.7ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 05:37:46,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-06-05 05:37:46,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 155. [2021-06-05 05:37:46,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 2.779220779220779) internal successors, (428), 154 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:37:46,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 428 transitions. [2021-06-05 05:37:46,839 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 428 transitions. Word has length 17 [2021-06-05 05:37:46,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:37:46,839 INFO L482 AbstractCegarLoop]: Abstraction has 155 states and 428 transitions. [2021-06-05 05:37:46,839 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:37:46,839 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 428 transitions. [2021-06-05 05:37:46,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:37:46,840 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:37:46,840 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:37:46,840 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-06-05 05:37:46,840 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:37:46,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:37:46,841 INFO L82 PathProgramCache]: Analyzing trace with hash 1972981309, now seen corresponding path program 1 times [2021-06-05 05:37:46,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:37:46,841 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543540045] [2021-06-05 05:37:46,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:37:46,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:37:46,873 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:37:46,873 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:37:46,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543540045] [2021-06-05 05:37:46,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543540045] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:37:46,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651573279] [2021-06-05 05:37:46,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:37:46,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:37:46,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-05 05:37:46,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:37:46,960 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:37:46,960 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1651573279] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:37:46,960 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:37:46,960 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2021-06-05 05:37:46,960 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92513464] [2021-06-05 05:37:46,961 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 05:37:46,961 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:37:46,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 05:37:46,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 05:37:46,961 INFO L87 Difference]: Start difference. First operand 155 states and 428 transitions. Second operand has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:37:47,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:37:47,049 INFO L93 Difference]: Finished difference Result 284 states and 786 transitions. [2021-06-05 05:37:47,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 05:37:47,050 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 05:37:47,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:37:47,051 INFO L225 Difference]: With dead ends: 284 [2021-06-05 05:37:47,051 INFO L226 Difference]: Without dead ends: 284 [2021-06-05 05:37:47,052 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 40.8ms TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-06-05 05:37:47,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2021-06-05 05:37:47,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 216. [2021-06-05 05:37:47,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 215 states have (on average 2.827906976744186) internal successors, (608), 215 states have internal predecessors, (608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:37:47,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 608 transitions. [2021-06-05 05:37:47,058 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 608 transitions. Word has length 19 [2021-06-05 05:37:47,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:37:47,058 INFO L482 AbstractCegarLoop]: Abstraction has 216 states and 608 transitions. [2021-06-05 05:37:47,058 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:37:47,058 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 608 transitions. [2021-06-05 05:37:47,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:37:47,059 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:37:47,059 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:37:47,281 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:37:47,282 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:37:47,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:37:47,282 INFO L82 PathProgramCache]: Analyzing trace with hash 179262851, now seen corresponding path program 1 times [2021-06-05 05:37:47,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:37:47,282 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690895972] [2021-06-05 05:37:47,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:37:47,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:37:47,356 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:37:47,356 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:37:47,356 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690895972] [2021-06-05 05:37:47,356 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690895972] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:37:47,356 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1642337681] [2021-06-05 05:37:47,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:37:47,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:37:47,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 05:37:47,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:37:47,466 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:37:47,467 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1642337681] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:37:47,467 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:37:47,467 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-06-05 05:37:47,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913700762] [2021-06-05 05:37:47,467 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 05:37:47,467 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:37:47,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 05:37:47,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-05 05:37:47,468 INFO L87 Difference]: Start difference. First operand 216 states and 608 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:37:47,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:37:47,505 INFO L93 Difference]: Finished difference Result 348 states and 985 transitions. [2021-06-05 05:37:47,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 05:37:47,506 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 05:37:47,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:37:47,508 INFO L225 Difference]: With dead ends: 348 [2021-06-05 05:37:47,508 INFO L226 Difference]: Without dead ends: 327 [2021-06-05 05:37:47,508 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 16 SyntacticMatches, 4 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 39.0ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-05 05:37:47,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2021-06-05 05:37:47,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 250. [2021-06-05 05:37:47,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 249 states have (on average 2.895582329317269) internal successors, (721), 249 states have internal predecessors, (721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:37:47,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 721 transitions. [2021-06-05 05:37:47,515 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 721 transitions. Word has length 19 [2021-06-05 05:37:47,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:37:47,515 INFO L482 AbstractCegarLoop]: Abstraction has 250 states and 721 transitions. [2021-06-05 05:37:47,515 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:37:47,515 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 721 transitions. [2021-06-05 05:37:47,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:37:47,516 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:37:47,516 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:37:47,735 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:37:47,735 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:37:47,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:37:47,736 INFO L82 PathProgramCache]: Analyzing trace with hash -701176209, now seen corresponding path program 2 times [2021-06-05 05:37:47,736 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:37:47,736 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155107658] [2021-06-05 05:37:47,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:37:47,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:37:47,786 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:37:47,786 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:37:47,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155107658] [2021-06-05 05:37:47,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155107658] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:37:47,787 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1345862332] [2021-06-05 05:37:47,787 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:37:47,836 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:37:47,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:37:47,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 05:37:47,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:37:47,905 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:37:47,905 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1345862332] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:37:47,905 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:37:47,906 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-06-05 05:37:47,906 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659808983] [2021-06-05 05:37:47,906 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 05:37:47,906 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:37:47,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 05:37:47,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-05 05:37:47,907 INFO L87 Difference]: Start difference. First operand 250 states and 721 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:37:47,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:37:47,946 INFO L93 Difference]: Finished difference Result 521 states and 1486 transitions. [2021-06-05 05:37:47,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 05:37:47,947 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 05:37:47,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:37:47,949 INFO L225 Difference]: With dead ends: 521 [2021-06-05 05:37:47,950 INFO L226 Difference]: Without dead ends: 500 [2021-06-05 05:37:47,950 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 16 SyntacticMatches, 4 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 24.5ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-05 05:37:47,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 500 states. [2021-06-05 05:37:47,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 500 to 290. [2021-06-05 05:37:47,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 289 states have (on average 3.0069204152249136) internal successors, (869), 289 states have internal predecessors, (869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:37:47,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 869 transitions. [2021-06-05 05:37:47,961 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 869 transitions. Word has length 19 [2021-06-05 05:37:47,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:37:47,962 INFO L482 AbstractCegarLoop]: Abstraction has 290 states and 869 transitions. [2021-06-05 05:37:47,963 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:37:47,963 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 869 transitions. [2021-06-05 05:37:47,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:37:47,964 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:37:47,964 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:37:48,176 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:37:48,177 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:37:48,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:37:48,177 INFO L82 PathProgramCache]: Analyzing trace with hash -1410387015, now seen corresponding path program 3 times [2021-06-05 05:37:48,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:37:48,177 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073865717] [2021-06-05 05:37:48,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:37:48,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:37:48,257 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:37:48,257 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:37:48,257 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073865717] [2021-06-05 05:37:48,257 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073865717] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:37:48,257 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733589294] [2021-06-05 05:37:48,257 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:37:48,288 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 05:37:48,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:37:48,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 05:37:48,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:37:48,370 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:37:48,370 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1733589294] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:37:48,370 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:37:48,370 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-06-05 05:37:48,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842881053] [2021-06-05 05:37:48,371 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 05:37:48,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:37:48,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 05:37:48,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-05 05:37:48,371 INFO L87 Difference]: Start difference. First operand 290 states and 869 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:37:48,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:37:48,410 INFO L93 Difference]: Finished difference Result 528 states and 1543 transitions. [2021-06-05 05:37:48,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 05:37:48,411 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 05:37:48,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:37:48,414 INFO L225 Difference]: With dead ends: 528 [2021-06-05 05:37:48,414 INFO L226 Difference]: Without dead ends: 507 [2021-06-05 05:37:48,414 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 16 SyntacticMatches, 4 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 41.0ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-05 05:37:48,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 507 states. [2021-06-05 05:37:48,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 507 to 326. [2021-06-05 05:37:48,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 325 states have (on average 3.08) internal successors, (1001), 325 states have internal predecessors, (1001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:37:48,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 1001 transitions. [2021-06-05 05:37:48,425 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 1001 transitions. Word has length 19 [2021-06-05 05:37:48,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:37:48,425 INFO L482 AbstractCegarLoop]: Abstraction has 326 states and 1001 transitions. [2021-06-05 05:37:48,425 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:37:48,425 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 1001 transitions. [2021-06-05 05:37:48,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:37:48,426 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:37:48,427 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:37:48,642 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:37:48,642 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:37:48,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:37:48,642 INFO L82 PathProgramCache]: Analyzing trace with hash 1264041205, now seen corresponding path program 2 times [2021-06-05 05:37:48,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:37:48,642 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338777478] [2021-06-05 05:37:48,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:37:48,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:37:48,672 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:37:48,672 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:37:48,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338777478] [2021-06-05 05:37:48,672 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338777478] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:37:48,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228056407] [2021-06-05 05:37:48,673 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:37:48,698 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:37:48,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:37:48,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-05 05:37:48,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:37:48,756 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:37:48,756 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [228056407] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:37:48,756 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:37:48,756 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-06-05 05:37:48,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617664856] [2021-06-05 05:37:48,757 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 05:37:48,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:37:48,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 05:37:48,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-05 05:37:48,758 INFO L87 Difference]: Start difference. First operand 326 states and 1001 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:37:48,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:37:48,874 INFO L93 Difference]: Finished difference Result 686 states and 2051 transitions. [2021-06-05 05:37:48,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 05:37:48,875 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 05:37:48,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:37:48,881 INFO L225 Difference]: With dead ends: 686 [2021-06-05 05:37:48,881 INFO L226 Difference]: Without dead ends: 686 [2021-06-05 05:37:48,886 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 36.1ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-06-05 05:37:48,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 686 states. [2021-06-05 05:37:48,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 686 to 370. [2021-06-05 05:37:48,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 369 states have (on average 3.2466124661246614) internal successors, (1198), 369 states have internal predecessors, (1198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:37:48,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 1198 transitions. [2021-06-05 05:37:48,907 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 1198 transitions. Word has length 19 [2021-06-05 05:37:48,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:37:48,907 INFO L482 AbstractCegarLoop]: Abstraction has 370 states and 1198 transitions. [2021-06-05 05:37:48,907 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:37:48,907 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 1198 transitions. [2021-06-05 05:37:48,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:37:48,908 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:37:48,908 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:37:49,132 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:37:49,133 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:37:49,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:37:49,133 INFO L82 PathProgramCache]: Analyzing trace with hash 1749845309, now seen corresponding path program 3 times [2021-06-05 05:37:49,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:37:49,134 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320392651] [2021-06-05 05:37:49,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:37:49,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:37:49,156 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:37:49,156 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:37:49,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320392651] [2021-06-05 05:37:49,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1320392651] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:37:49,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1406778432] [2021-06-05 05:37:49,156 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:37:49,181 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 05:37:49,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:37:49,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-05 05:37:49,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:37:49,229 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:37:49,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1406778432] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:37:49,229 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:37:49,229 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-06-05 05:37:49,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082175281] [2021-06-05 05:37:49,229 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 05:37:49,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:37:49,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 05:37:49,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-05 05:37:49,230 INFO L87 Difference]: Start difference. First operand 370 states and 1198 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:37:49,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:37:49,359 INFO L93 Difference]: Finished difference Result 642 states and 2005 transitions. [2021-06-05 05:37:49,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 05:37:49,360 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 05:37:49,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:37:49,366 INFO L225 Difference]: With dead ends: 642 [2021-06-05 05:37:49,366 INFO L226 Difference]: Without dead ends: 642 [2021-06-05 05:37:49,367 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 27.0ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-06-05 05:37:49,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 642 states. [2021-06-05 05:37:49,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 642 to 388. [2021-06-05 05:37:49,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 388 states, 387 states have (on average 3.289405684754522) internal successors, (1273), 387 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) [2021-06-05 05:37:49,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 1273 transitions. [2021-06-05 05:37:49,382 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 1273 transitions. Word has length 19 [2021-06-05 05:37:49,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:37:49,383 INFO L482 AbstractCegarLoop]: Abstraction has 388 states and 1273 transitions. [2021-06-05 05:37:49,383 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:37:49,383 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 1273 transitions. [2021-06-05 05:37:49,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 05:37:49,384 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:37:49,384 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:37:49,603 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-06-05 05:37:49,604 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:37:49,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:37:49,604 INFO L82 PathProgramCache]: Analyzing trace with hash 768837147, now seen corresponding path program 4 times [2021-06-05 05:37:49,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:37:49,604 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641728653] [2021-06-05 05:37:49,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:37:49,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:37:49,666 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:37:49,666 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:37:49,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641728653] [2021-06-05 05:37:49,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641728653] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:37:49,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887814182] [2021-06-05 05:37:49,667 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:37:49,699 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:37:49,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:37:49,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 05:37:49,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:37:49,772 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:37:49,772 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1887814182] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:37:49,772 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:37:49,773 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-05 05:37:49,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631758130] [2021-06-05 05:37:49,774 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 05:37:49,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:37:49,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 05:37:49,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-06-05 05:37:49,775 INFO L87 Difference]: Start difference. First operand 388 states and 1273 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:37:49,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:37:49,826 INFO L93 Difference]: Finished difference Result 752 states and 2293 transitions. [2021-06-05 05:37:49,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 05:37:49,827 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 05:37:49,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:37:49,832 INFO L225 Difference]: With dead ends: 752 [2021-06-05 05:37:49,832 INFO L226 Difference]: Without dead ends: 731 [2021-06-05 05:37:49,832 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 17 SyntacticMatches, 5 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 34.6ms TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-06-05 05:37:49,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 731 states. [2021-06-05 05:37:49,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 731 to 468. [2021-06-05 05:37:49,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 468 states, 467 states have (on average 3.278372591006424) internal successors, (1531), 467 states have internal predecessors, (1531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:37:49,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 468 states to 468 states and 1531 transitions. [2021-06-05 05:37:49,847 INFO L78 Accepts]: Start accepts. Automaton has 468 states and 1531 transitions. Word has length 21 [2021-06-05 05:37:49,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:37:49,848 INFO L482 AbstractCegarLoop]: Abstraction has 468 states and 1531 transitions. [2021-06-05 05:37:49,848 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:37:49,848 INFO L276 IsEmpty]: Start isEmpty. Operand 468 states and 1531 transitions. [2021-06-05 05:37:49,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 05:37:49,849 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:37:49,849 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:37:50,065 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:37:50,065 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:37:50,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:37:50,065 INFO L82 PathProgramCache]: Analyzing trace with hash -1069401327, now seen corresponding path program 5 times [2021-06-05 05:37:50,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:37:50,066 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376094195] [2021-06-05 05:37:50,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:37:50,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:37:50,110 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:37:50,110 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:37:50,110 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376094195] [2021-06-05 05:37:50,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1376094195] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:37:50,110 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2066888521] [2021-06-05 05:37:50,110 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:37:50,154 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:37:50,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:37:50,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 05:37:50,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:37:50,215 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:37:50,215 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2066888521] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:37:50,215 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:37:50,215 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-05 05:37:50,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742339857] [2021-06-05 05:37:50,217 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 05:37:50,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:37:50,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 05:37:50,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-06-05 05:37:50,217 INFO L87 Difference]: Start difference. First operand 468 states and 1531 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:37:50,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:37:50,273 INFO L93 Difference]: Finished difference Result 738 states and 2318 transitions. [2021-06-05 05:37:50,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 05:37:50,273 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 05:37:50,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:37:50,277 INFO L225 Difference]: With dead ends: 738 [2021-06-05 05:37:50,277 INFO L226 Difference]: Without dead ends: 717 [2021-06-05 05:37:50,277 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 32.4ms TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-06-05 05:37:50,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 717 states. [2021-06-05 05:37:50,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 717 to 485. [2021-06-05 05:37:50,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 485 states, 484 states have (on average 3.3161157024793386) internal successors, (1605), 484 states have internal predecessors, (1605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:37:50,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 485 states to 485 states and 1605 transitions. [2021-06-05 05:37:50,293 INFO L78 Accepts]: Start accepts. Automaton has 485 states and 1605 transitions. Word has length 21 [2021-06-05 05:37:50,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:37:50,293 INFO L482 AbstractCegarLoop]: Abstraction has 485 states and 1605 transitions. [2021-06-05 05:37:50,293 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:37:50,293 INFO L276 IsEmpty]: Start isEmpty. Operand 485 states and 1605 transitions. [2021-06-05 05:37:50,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 05:37:50,295 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:37:50,295 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:37:50,508 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:37:50,509 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:37:50,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:37:50,509 INFO L82 PathProgramCache]: Analyzing trace with hash -1991189035, now seen corresponding path program 6 times [2021-06-05 05:37:50,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:37:50,509 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724127111] [2021-06-05 05:37:50,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:37:50,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:37:50,587 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:37:50,587 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:37:50,587 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724127111] [2021-06-05 05:37:50,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724127111] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:37:50,587 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479406925] [2021-06-05 05:37:50,587 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:37:50,625 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:37:50,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:37:50,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 05:37:50,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:37:50,704 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:37:50,704 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1479406925] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:37:50,704 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:37:50,704 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-05 05:37:50,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066377154] [2021-06-05 05:37:50,705 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 05:37:50,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:37:50,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 05:37:50,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-06-05 05:37:50,705 INFO L87 Difference]: Start difference. First operand 485 states and 1605 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:37:50,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:37:50,762 INFO L93 Difference]: Finished difference Result 608 states and 1958 transitions. [2021-06-05 05:37:50,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 05:37:50,763 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 05:37:50,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:37:50,766 INFO L225 Difference]: With dead ends: 608 [2021-06-05 05:37:50,766 INFO L226 Difference]: Without dead ends: 587 [2021-06-05 05:37:50,768 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 47.1ms TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-06-05 05:37:50,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 587 states. [2021-06-05 05:37:50,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 587 to 495. [2021-06-05 05:37:50,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 495 states, 494 states have (on average 3.3238866396761133) internal successors, (1642), 494 states have internal predecessors, (1642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:37:50,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 495 states to 495 states and 1642 transitions. [2021-06-05 05:37:50,795 INFO L78 Accepts]: Start accepts. Automaton has 495 states and 1642 transitions. Word has length 21 [2021-06-05 05:37:50,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:37:50,796 INFO L482 AbstractCegarLoop]: Abstraction has 495 states and 1642 transitions. [2021-06-05 05:37:50,796 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:37:50,796 INFO L276 IsEmpty]: Start isEmpty. Operand 495 states and 1642 transitions. [2021-06-05 05:37:50,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 05:37:50,797 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:37:50,798 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:37:51,020 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-06-05 05:37:51,020 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:37:51,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:37:51,021 INFO L82 PathProgramCache]: Analyzing trace with hash -239271515, now seen corresponding path program 4 times [2021-06-05 05:37:51,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:37:51,021 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858760062] [2021-06-05 05:37:51,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:37:51,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:37:51,047 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:37:51,048 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:37:51,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858760062] [2021-06-05 05:37:51,048 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [858760062] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:37:51,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1623653774] [2021-06-05 05:37:51,048 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:37:51,075 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:37:51,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:37:51,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-05 05:37:51,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:37:51,122 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:37:51,122 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1623653774] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 05:37:51,122 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-05 05:37:51,122 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-06-05 05:37:51,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631409570] [2021-06-05 05:37:51,123 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 05:37:51,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:37:51,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 05:37:51,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-06-05 05:37:51,123 INFO L87 Difference]: Start difference. First operand 495 states and 1642 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:37:51,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:37:51,189 INFO L93 Difference]: Finished difference Result 728 states and 2245 transitions. [2021-06-05 05:37:51,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 05:37:51,189 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 05:37:51,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:37:51,193 INFO L225 Difference]: With dead ends: 728 [2021-06-05 05:37:51,193 INFO L226 Difference]: Without dead ends: 696 [2021-06-05 05:37:51,193 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 36.9ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-06-05 05:37:51,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 696 states. [2021-06-05 05:37:51,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 696 to 583. [2021-06-05 05:37:51,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 583 states, 582 states have (on average 3.261168384879725) internal successors, (1898), 582 states have internal predecessors, (1898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:37:51,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 583 states to 583 states and 1898 transitions. [2021-06-05 05:37:51,210 INFO L78 Accepts]: Start accepts. Automaton has 583 states and 1898 transitions. Word has length 21 [2021-06-05 05:37:51,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:37:51,210 INFO L482 AbstractCegarLoop]: Abstraction has 583 states and 1898 transitions. [2021-06-05 05:37:51,210 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:37:51,210 INFO L276 IsEmpty]: Start isEmpty. Operand 583 states and 1898 transitions. [2021-06-05 05:37:51,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 05:37:51,212 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:37:51,212 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:37:51,429 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-06-05 05:37:51,430 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:37:51,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:37:51,430 INFO L82 PathProgramCache]: Analyzing trace with hash -2124383007, now seen corresponding path program 5 times [2021-06-05 05:37:51,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:37:51,430 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685567934] [2021-06-05 05:37:51,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:37:51,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:37:51,461 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:37:51,461 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:37:51,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685567934] [2021-06-05 05:37:51,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1685567934] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 05:37:51,461 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 05:37:51,461 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 05:37:51,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668061333] [2021-06-05 05:37:51,462 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 05:37:51,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:37:51,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 05:37:51,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 05:37:51,462 INFO L87 Difference]: Start difference. First operand 583 states and 1898 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:37:51,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:37:51,487 INFO L93 Difference]: Finished difference Result 673 states and 2107 transitions. [2021-06-05 05:37:51,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 05:37:51,488 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 05:37:51,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:37:51,491 INFO L225 Difference]: With dead ends: 673 [2021-06-05 05:37:51,491 INFO L226 Difference]: Without dead ends: 625 [2021-06-05 05:37:51,492 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.8ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 05:37:51,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 625 states. [2021-06-05 05:37:51,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 625 to 529. [2021-06-05 05:37:51,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 529 states, 528 states have (on average 3.2556818181818183) internal successors, (1719), 528 states have internal predecessors, (1719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:37:51,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 529 states to 529 states and 1719 transitions. [2021-06-05 05:37:51,509 INFO L78 Accepts]: Start accepts. Automaton has 529 states and 1719 transitions. Word has length 21 [2021-06-05 05:37:51,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:37:51,510 INFO L482 AbstractCegarLoop]: Abstraction has 529 states and 1719 transitions. [2021-06-05 05:37:51,510 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:37:51,510 INFO L276 IsEmpty]: Start isEmpty. Operand 529 states and 1719 transitions. [2021-06-05 05:37:51,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 05:37:51,511 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:37:51,511 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:37:51,511 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-06-05 05:37:51,512 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:37:51,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:37:51,512 INFO L82 PathProgramCache]: Analyzing trace with hash 1743968741, now seen corresponding path program 6 times [2021-06-05 05:37:51,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:37:51,512 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743509763] [2021-06-05 05:37:51,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:37:51,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:37:51,539 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:37:51,539 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:37:51,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743509763] [2021-06-05 05:37:51,539 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743509763] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:37:51,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819043935] [2021-06-05 05:37:51,539 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:37:51,579 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 05:37:51,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:37:51,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-05 05:37:51,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:37:51,618 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:37:51,619 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [819043935] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:37:51,619 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:37:51,619 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-06-05 05:37:51,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312844209] [2021-06-05 05:37:51,619 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 05:37:51,619 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:37:51,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 05:37:51,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-06-05 05:37:51,620 INFO L87 Difference]: Start difference. First operand 529 states and 1719 transitions. Second operand has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:37:51,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:37:51,703 INFO L93 Difference]: Finished difference Result 834 states and 2517 transitions. [2021-06-05 05:37:51,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 05:37:51,703 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 05:37:51,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:37:51,707 INFO L225 Difference]: With dead ends: 834 [2021-06-05 05:37:51,707 INFO L226 Difference]: Without dead ends: 804 [2021-06-05 05:37:51,708 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 24.7ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-06-05 05:37:51,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 804 states. [2021-06-05 05:37:51,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 804 to 598. [2021-06-05 05:37:51,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 598 states, 597 states have (on average 3.2981574539363483) internal successors, (1969), 597 states have internal predecessors, (1969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:37:51,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 598 states to 598 states and 1969 transitions. [2021-06-05 05:37:51,728 INFO L78 Accepts]: Start accepts. Automaton has 598 states and 1969 transitions. Word has length 21 [2021-06-05 05:37:51,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:37:51,728 INFO L482 AbstractCegarLoop]: Abstraction has 598 states and 1969 transitions. [2021-06-05 05:37:51,728 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:37:51,728 INFO L276 IsEmpty]: Start isEmpty. Operand 598 states and 1969 transitions. [2021-06-05 05:37:51,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 05:37:51,730 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:37:51,730 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:37:51,945 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-06-05 05:37:51,945 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:37:51,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:37:51,945 INFO L82 PathProgramCache]: Analyzing trace with hash 685016161, now seen corresponding path program 7 times [2021-06-05 05:37:51,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:37:51,945 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969967809] [2021-06-05 05:37:51,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:37:51,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:37:51,963 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:37:51,963 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:37:51,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969967809] [2021-06-05 05:37:51,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969967809] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:37:51,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [519429482] [2021-06-05 05:37:51,963 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:37:52,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:37:52,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-05 05:37:52,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:37:52,041 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:37:52,041 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [519429482] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 05:37:52,041 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-05 05:37:52,041 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2021-06-05 05:37:52,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265993291] [2021-06-05 05:37:52,041 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 05:37:52,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:37:52,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 05:37:52,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-06-05 05:37:52,042 INFO L87 Difference]: Start difference. First operand 598 states and 1969 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:37:52,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:37:52,112 INFO L93 Difference]: Finished difference Result 790 states and 2403 transitions. [2021-06-05 05:37:52,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 05:37:52,113 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 05:37:52,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:37:52,117 INFO L225 Difference]: With dead ends: 790 [2021-06-05 05:37:52,117 INFO L226 Difference]: Without dead ends: 782 [2021-06-05 05:37:52,117 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 27.7ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-06-05 05:37:52,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 782 states. [2021-06-05 05:37:52,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 782 to 591. [2021-06-05 05:37:52,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 591 states, 590 states have (on average 3.2711864406779663) internal successors, (1930), 590 states have internal predecessors, (1930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:37:52,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 591 states to 591 states and 1930 transitions. [2021-06-05 05:37:52,134 INFO L78 Accepts]: Start accepts. Automaton has 591 states and 1930 transitions. Word has length 21 [2021-06-05 05:37:52,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:37:52,134 INFO L482 AbstractCegarLoop]: Abstraction has 591 states and 1930 transitions. [2021-06-05 05:37:52,134 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:37:52,134 INFO L276 IsEmpty]: Start isEmpty. Operand 591 states and 1930 transitions. [2021-06-05 05:37:52,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 05:37:52,136 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:37:52,136 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:37:52,358 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:37:52,358 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:37:52,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:37:52,358 INFO L82 PathProgramCache]: Analyzing trace with hash 1433719009, now seen corresponding path program 8 times [2021-06-05 05:37:52,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:37:52,358 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501108082] [2021-06-05 05:37:52,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:37:52,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:37:52,400 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:37:52,400 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:37:52,401 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501108082] [2021-06-05 05:37:52,401 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501108082] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:37:52,401 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [580144947] [2021-06-05 05:37:52,401 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:37:52,436 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:37:52,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:37:52,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 05:37:52,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:37:52,501 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:37:52,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [580144947] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:37:52,501 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:37:52,501 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 8 [2021-06-05 05:37:52,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41066152] [2021-06-05 05:37:52,502 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 05:37:52,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:37:52,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 05:37:52,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-06-05 05:37:52,502 INFO L87 Difference]: Start difference. First operand 591 states and 1930 transitions. Second operand has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 8 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:37:52,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:37:52,637 INFO L93 Difference]: Finished difference Result 768 states and 2356 transitions. [2021-06-05 05:37:52,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 05:37:52,637 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 8 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 05:37:52,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:37:52,641 INFO L225 Difference]: With dead ends: 768 [2021-06-05 05:37:52,641 INFO L226 Difference]: Without dead ends: 732 [2021-06-05 05:37:52,641 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 93.3ms TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-06-05 05:37:52,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 732 states. [2021-06-05 05:37:52,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 732 to 589. [2021-06-05 05:37:52,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 589 states, 588 states have (on average 3.241496598639456) internal successors, (1906), 588 states have internal predecessors, (1906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:37:52,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 589 states to 589 states and 1906 transitions. [2021-06-05 05:37:52,658 INFO L78 Accepts]: Start accepts. Automaton has 589 states and 1906 transitions. Word has length 21 [2021-06-05 05:37:52,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:37:52,658 INFO L482 AbstractCegarLoop]: Abstraction has 589 states and 1906 transitions. [2021-06-05 05:37:52,658 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 8 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:37:52,658 INFO L276 IsEmpty]: Start isEmpty. Operand 589 states and 1906 transitions. [2021-06-05 05:37:52,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 05:37:52,660 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:37:52,660 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:37:52,884 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:37:52,884 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:37:52,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:37:52,884 INFO L82 PathProgramCache]: Analyzing trace with hash 1263605021, now seen corresponding path program 9 times [2021-06-05 05:37:52,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:37:52,885 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357317350] [2021-06-05 05:37:52,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:37:52,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:37:52,918 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:37:52,918 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:37:52,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357317350] [2021-06-05 05:37:52,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357317350] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:37:52,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1844865241] [2021-06-05 05:37:52,919 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:37:52,942 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:37:52,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:37:52,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 05:37:52,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:37:52,996 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:37:52,996 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1844865241] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:37:52,997 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:37:52,997 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-06-05 05:37:52,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217503382] [2021-06-05 05:37:52,997 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 05:37:52,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:37:52,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 05:37:52,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-06-05 05:37:52,998 INFO L87 Difference]: Start difference. First operand 589 states and 1906 transitions. Second operand has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:37:53,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:37:53,144 INFO L93 Difference]: Finished difference Result 1001 states and 3072 transitions. [2021-06-05 05:37:53,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 05:37:53,144 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 05:37:53,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:37:53,149 INFO L225 Difference]: With dead ends: 1001 [2021-06-05 05:37:53,149 INFO L226 Difference]: Without dead ends: 987 [2021-06-05 05:37:53,149 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 53.4ms TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-06-05 05:37:53,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 987 states. [2021-06-05 05:37:53,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 987 to 737. [2021-06-05 05:37:53,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 737 states, 736 states have (on average 3.2880434782608696) internal successors, (2420), 736 states have internal predecessors, (2420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:37:53,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 737 states to 737 states and 2420 transitions. [2021-06-05 05:37:53,168 INFO L78 Accepts]: Start accepts. Automaton has 737 states and 2420 transitions. Word has length 21 [2021-06-05 05:37:53,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:37:53,168 INFO L482 AbstractCegarLoop]: Abstraction has 737 states and 2420 transitions. [2021-06-05 05:37:53,168 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:37:53,168 INFO L276 IsEmpty]: Start isEmpty. Operand 737 states and 2420 transitions. [2021-06-05 05:37:53,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 05:37:53,170 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:37:53,170 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:37:53,384 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:37:53,385 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:37:53,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:37:53,385 INFO L82 PathProgramCache]: Analyzing trace with hash -585994983, now seen corresponding path program 10 times [2021-06-05 05:37:53,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:37:53,385 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786471615] [2021-06-05 05:37:53,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:37:53,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:37:53,424 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:37:53,425 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:37:53,425 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786471615] [2021-06-05 05:37:53,425 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786471615] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:37:53,425 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2030315922] [2021-06-05 05:37:53,425 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:37:53,473 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:37:53,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:37:53,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 05:37:53,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:37:53,535 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:37:53,535 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2030315922] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:37:53,535 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:37:53,535 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-06-05 05:37:53,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674879448] [2021-06-05 05:37:53,535 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 05:37:53,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:37:53,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 05:37:53,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-06-05 05:37:53,536 INFO L87 Difference]: Start difference. First operand 737 states and 2420 transitions. Second operand has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:37:53,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:37:53,639 INFO L93 Difference]: Finished difference Result 1120 states and 3472 transitions. [2021-06-05 05:37:53,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 05:37:53,640 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 05:37:53,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:37:53,644 INFO L225 Difference]: With dead ends: 1120 [2021-06-05 05:37:53,644 INFO L226 Difference]: Without dead ends: 1120 [2021-06-05 05:37:53,645 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 59.3ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-06-05 05:37:53,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1120 states. [2021-06-05 05:37:53,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1120 to 810. [2021-06-05 05:37:53,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 810 states, 809 states have (on average 3.3325092707045734) internal successors, (2696), 809 states have internal predecessors, (2696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:37:53,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 810 states to 810 states and 2696 transitions. [2021-06-05 05:37:53,667 INFO L78 Accepts]: Start accepts. Automaton has 810 states and 2696 transitions. Word has length 21 [2021-06-05 05:37:53,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:37:53,667 INFO L482 AbstractCegarLoop]: Abstraction has 810 states and 2696 transitions. [2021-06-05 05:37:53,667 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:37:53,667 INFO L276 IsEmpty]: Start isEmpty. Operand 810 states and 2696 transitions. [2021-06-05 05:37:53,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 05:37:53,669 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:37:53,669 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:37:53,884 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-06-05 05:37:53,885 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:37:53,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:37:53,885 INFO L82 PathProgramCache]: Analyzing trace with hash -245591027, now seen corresponding path program 11 times [2021-06-05 05:37:53,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:37:53,885 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235669746] [2021-06-05 05:37:53,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:37:53,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:37:53,908 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:37:53,908 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:37:53,908 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235669746] [2021-06-05 05:37:53,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [235669746] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:37:53,908 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [316980821] [2021-06-05 05:37:53,908 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:37:53,933 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 05:37:53,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:37:53,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 05:37:53,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:37:54,006 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:37:54,007 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [316980821] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:37:54,007 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:37:54,007 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 8 [2021-06-05 05:37:54,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798637843] [2021-06-05 05:37:54,007 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 05:37:54,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:37:54,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 05:37:54,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-06-05 05:37:54,008 INFO L87 Difference]: Start difference. First operand 810 states and 2696 transitions. Second operand has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:37:54,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:37:54,099 INFO L93 Difference]: Finished difference Result 1340 states and 4210 transitions. [2021-06-05 05:37:54,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 05:37:54,100 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 05:37:54,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:37:54,105 INFO L225 Difference]: With dead ends: 1340 [2021-06-05 05:37:54,106 INFO L226 Difference]: Without dead ends: 1332 [2021-06-05 05:37:54,106 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 52.9ms TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-06-05 05:37:54,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1332 states. [2021-06-05 05:37:54,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1332 to 992. [2021-06-05 05:37:54,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 992 states, 991 states have (on average 3.375378405650858) internal successors, (3345), 991 states have internal predecessors, (3345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:37:54,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 992 states to 992 states and 3345 transitions. [2021-06-05 05:37:54,130 INFO L78 Accepts]: Start accepts. Automaton has 992 states and 3345 transitions. Word has length 21 [2021-06-05 05:37:54,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:37:54,131 INFO L482 AbstractCegarLoop]: Abstraction has 992 states and 3345 transitions. [2021-06-05 05:37:54,131 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:37:54,131 INFO L276 IsEmpty]: Start isEmpty. Operand 992 states and 3345 transitions. [2021-06-05 05:37:54,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 05:37:54,133 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:37:54,133 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:37:54,348 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-06-05 05:37:54,349 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:37:54,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:37:54,349 INFO L82 PathProgramCache]: Analyzing trace with hash -1657258739, now seen corresponding path program 12 times [2021-06-05 05:37:54,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:37:54,349 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944731894] [2021-06-05 05:37:54,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:37:54,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:37:54,385 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:37:54,385 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:37:54,385 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944731894] [2021-06-05 05:37:54,385 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944731894] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:37:54,385 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [21175661] [2021-06-05 05:37:54,386 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:37:54,411 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:37:54,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:37:54,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 05:37:54,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:37:54,480 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:37:54,480 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [21175661] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:37:54,480 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:37:54,480 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2021-06-05 05:37:54,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335981592] [2021-06-05 05:37:54,481 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 05:37:54,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:37:54,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 05:37:54,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-06-05 05:37:54,481 INFO L87 Difference]: Start difference. First operand 992 states and 3345 transitions. Second operand has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:37:54,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:37:54,634 INFO L93 Difference]: Finished difference Result 1623 states and 5234 transitions. [2021-06-05 05:37:54,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 05:37:54,634 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 05:37:54,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:37:54,641 INFO L225 Difference]: With dead ends: 1623 [2021-06-05 05:37:54,641 INFO L226 Difference]: Without dead ends: 1615 [2021-06-05 05:37:54,641 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 74.4ms TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-06-05 05:37:54,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1615 states. [2021-06-05 05:37:54,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1615 to 1215. [2021-06-05 05:37:54,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1215 states, 1214 states have (on average 3.383031301482702) internal successors, (4107), 1214 states have internal predecessors, (4107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:37:54,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1215 states to 1215 states and 4107 transitions. [2021-06-05 05:37:54,670 INFO L78 Accepts]: Start accepts. Automaton has 1215 states and 4107 transitions. Word has length 21 [2021-06-05 05:37:54,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:37:54,670 INFO L482 AbstractCegarLoop]: Abstraction has 1215 states and 4107 transitions. [2021-06-05 05:37:54,670 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:37:54,670 INFO L276 IsEmpty]: Start isEmpty. Operand 1215 states and 4107 transitions. [2021-06-05 05:37:54,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 05:37:54,673 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:37:54,673 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:37:54,884 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-06-05 05:37:54,885 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:37:54,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:37:54,885 INFO L82 PathProgramCache]: Analyzing trace with hash -372466675, now seen corresponding path program 13 times [2021-06-05 05:37:54,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:37:54,885 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144262909] [2021-06-05 05:37:54,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:37:54,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:37:54,923 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:37:54,924 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:37:54,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144262909] [2021-06-05 05:37:54,924 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144262909] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:37:54,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1906423481] [2021-06-05 05:37:54,924 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:37:54,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:37:54,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 05:37:54,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:37:55,019 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:37:55,019 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1906423481] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:37:55,019 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:37:55,019 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 8 [2021-06-05 05:37:55,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221998305] [2021-06-05 05:37:55,019 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 05:37:55,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:37:55,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 05:37:55,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-06-05 05:37:55,020 INFO L87 Difference]: Start difference. First operand 1215 states and 4107 transitions. Second operand has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:37:55,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:37:55,164 INFO L93 Difference]: Finished difference Result 1527 states and 4890 transitions. [2021-06-05 05:37:55,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 05:37:55,165 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 05:37:55,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:37:55,177 INFO L225 Difference]: With dead ends: 1527 [2021-06-05 05:37:55,177 INFO L226 Difference]: Without dead ends: 1515 [2021-06-05 05:37:55,178 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 57.6ms TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-06-05 05:37:55,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1515 states. [2021-06-05 05:37:55,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1515 to 1211. [2021-06-05 05:37:55,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1211 states, 1210 states have (on average 3.3826446280991735) internal successors, (4093), 1210 states have internal predecessors, (4093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:37:55,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1211 states to 1211 states and 4093 transitions. [2021-06-05 05:37:55,220 INFO L78 Accepts]: Start accepts. Automaton has 1211 states and 4093 transitions. Word has length 21 [2021-06-05 05:37:55,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:37:55,220 INFO L482 AbstractCegarLoop]: Abstraction has 1211 states and 4093 transitions. [2021-06-05 05:37:55,221 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:37:55,221 INFO L276 IsEmpty]: Start isEmpty. Operand 1211 states and 4093 transitions. [2021-06-05 05:37:55,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 05:37:55,224 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:37:55,224 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:37:55,444 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-06-05 05:37:55,445 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:37:55,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:37:55,445 INFO L82 PathProgramCache]: Analyzing trace with hash 655355345, now seen corresponding path program 14 times [2021-06-05 05:37:55,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:37:55,445 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436808145] [2021-06-05 05:37:55,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:37:55,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:37:55,474 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:37:55,475 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:37:55,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436808145] [2021-06-05 05:37:55,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436808145] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:37:55,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538331771] [2021-06-05 05:37:55,475 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:37:55,500 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:37:55,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:37:55,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 05:37:55,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:37:55,564 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:37:55,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1538331771] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:37:55,564 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:37:55,564 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2021-06-05 05:37:55,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506719740] [2021-06-05 05:37:55,565 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 05:37:55,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:37:55,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 05:37:55,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-06-05 05:37:55,565 INFO L87 Difference]: Start difference. First operand 1211 states and 4093 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:37:55,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:37:55,749 INFO L93 Difference]: Finished difference Result 2197 states and 7082 transitions. [2021-06-05 05:37:55,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 05:37:55,750 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 05:37:55,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:37:55,755 INFO L225 Difference]: With dead ends: 2197 [2021-06-05 05:37:55,755 INFO L226 Difference]: Without dead ends: 2197 [2021-06-05 05:37:55,756 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 84.7ms TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2021-06-05 05:37:55,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2197 states. [2021-06-05 05:37:55,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2197 to 1448. [2021-06-05 05:37:55,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1448 states, 1447 states have (on average 3.4457498272287492) internal successors, (4986), 1447 states have internal predecessors, (4986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:37:55,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1448 states to 1448 states and 4986 transitions. [2021-06-05 05:37:55,791 INFO L78 Accepts]: Start accepts. Automaton has 1448 states and 4986 transitions. Word has length 21 [2021-06-05 05:37:55,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:37:55,791 INFO L482 AbstractCegarLoop]: Abstraction has 1448 states and 4986 transitions. [2021-06-05 05:37:55,791 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:37:55,791 INFO L276 IsEmpty]: Start isEmpty. Operand 1448 states and 4986 transitions. [2021-06-05 05:37:55,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 05:37:55,795 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:37:55,795 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:37:56,008 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-06-05 05:37:56,009 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:37:56,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:37:56,009 INFO L82 PathProgramCache]: Analyzing trace with hash 2086226193, now seen corresponding path program 15 times [2021-06-05 05:37:56,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:37:56,009 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976699458] [2021-06-05 05:37:56,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:37:56,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:37:56,031 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:37:56,031 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:37:56,031 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976699458] [2021-06-05 05:37:56,031 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976699458] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:37:56,031 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [705546139] [2021-06-05 05:37:56,031 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:37:56,057 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 05:37:56,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:37:56,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 05:37:56,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:37:56,114 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:37:56,114 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [705546139] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:37:56,114 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:37:56,115 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 8 [2021-06-05 05:37:56,115 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302781027] [2021-06-05 05:37:56,115 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 05:37:56,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:37:56,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 05:37:56,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-06-05 05:37:56,115 INFO L87 Difference]: Start difference. First operand 1448 states and 4986 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:37:56,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:37:56,305 INFO L93 Difference]: Finished difference Result 1739 states and 5729 transitions. [2021-06-05 05:37:56,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 05:37:56,306 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 05:37:56,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:37:56,309 INFO L225 Difference]: With dead ends: 1739 [2021-06-05 05:37:56,309 INFO L226 Difference]: Without dead ends: 1693 [2021-06-05 05:37:56,309 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 107.9ms TimeCoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2021-06-05 05:37:56,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1693 states. [2021-06-05 05:37:56,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1693 to 1505. [2021-06-05 05:37:56,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1505 states, 1504 states have (on average 3.4095744680851063) internal successors, (5128), 1504 states have internal predecessors, (5128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:37:56,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1505 states to 1505 states and 5128 transitions. [2021-06-05 05:37:56,336 INFO L78 Accepts]: Start accepts. Automaton has 1505 states and 5128 transitions. Word has length 21 [2021-06-05 05:37:56,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:37:56,336 INFO L482 AbstractCegarLoop]: Abstraction has 1505 states and 5128 transitions. [2021-06-05 05:37:56,337 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:37:56,337 INFO L276 IsEmpty]: Start isEmpty. Operand 1505 states and 5128 transitions. [2021-06-05 05:37:56,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 05:37:56,340 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:37:56,340 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:37:56,562 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:37:56,562 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:37:56,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:37:56,563 INFO L82 PathProgramCache]: Analyzing trace with hash -1917770029, now seen corresponding path program 7 times [2021-06-05 05:37:56,563 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:37:56,563 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386665486] [2021-06-05 05:37:56,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:37:56,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:37:56,607 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:37:56,607 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:37:56,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386665486] [2021-06-05 05:37:56,607 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386665486] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:37:56,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [950467923] [2021-06-05 05:37:56,607 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:37:56,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:37:56,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 05:37:56,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:37:56,687 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:37:56,687 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [950467923] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:37:56,687 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:37:56,687 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-05 05:37:56,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672873028] [2021-06-05 05:37:56,687 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 05:37:56,687 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:37:56,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 05:37:56,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-06-05 05:37:56,688 INFO L87 Difference]: Start difference. First operand 1505 states and 5128 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:37:56,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:37:56,731 INFO L93 Difference]: Finished difference Result 1808 states and 5991 transitions. [2021-06-05 05:37:56,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 05:37:56,731 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 05:37:56,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:37:56,735 INFO L225 Difference]: With dead ends: 1808 [2021-06-05 05:37:56,735 INFO L226 Difference]: Without dead ends: 1787 [2021-06-05 05:37:56,736 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 27.6ms TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-06-05 05:37:56,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1787 states. [2021-06-05 05:37:56,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1787 to 1518. [2021-06-05 05:37:56,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1518 states, 1517 states have (on average 3.4225444957152273) internal successors, (5192), 1517 states have internal predecessors, (5192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:37:56,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1518 states to 1518 states and 5192 transitions. [2021-06-05 05:37:56,786 INFO L78 Accepts]: Start accepts. Automaton has 1518 states and 5192 transitions. Word has length 21 [2021-06-05 05:37:56,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:37:56,786 INFO L482 AbstractCegarLoop]: Abstraction has 1518 states and 5192 transitions. [2021-06-05 05:37:56,786 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:37:56,786 INFO L276 IsEmpty]: Start isEmpty. Operand 1518 states and 5192 transitions. [2021-06-05 05:37:56,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 05:37:56,791 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:37:56,791 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:37:57,004 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-06-05 05:37:57,005 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:37:57,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:37:57,005 INFO L82 PathProgramCache]: Analyzing trace with hash 1455409559, now seen corresponding path program 8 times [2021-06-05 05:37:57,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:37:57,005 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268813150] [2021-06-05 05:37:57,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:37:57,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:37:57,066 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:37:57,066 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:37:57,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268813150] [2021-06-05 05:37:57,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268813150] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:37:57,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1544289264] [2021-06-05 05:37:57,066 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 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:37:57,090 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:37:57,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:37:57,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 05:37:57,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:37:57,140 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:37:57,141 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1544289264] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:37:57,141 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:37:57,141 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-05 05:37:57,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478884434] [2021-06-05 05:37:57,141 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 05:37:57,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:37:57,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 05:37:57,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-06-05 05:37:57,142 INFO L87 Difference]: Start difference. First operand 1518 states and 5192 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:37:57,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:37:57,199 INFO L93 Difference]: Finished difference Result 1722 states and 5770 transitions. [2021-06-05 05:37:57,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 05:37:57,200 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 05:37:57,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:37:57,204 INFO L225 Difference]: With dead ends: 1722 [2021-06-05 05:37:57,204 INFO L226 Difference]: Without dead ends: 1701 [2021-06-05 05:37:57,204 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 50.8ms TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-06-05 05:37:57,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1701 states. [2021-06-05 05:37:57,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1701 to 1528. [2021-06-05 05:37:57,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1528 states, 1527 states have (on average 3.4282907662082516) internal successors, (5235), 1527 states have internal predecessors, (5235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:37:57,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1528 states to 1528 states and 5235 transitions. [2021-06-05 05:37:57,235 INFO L78 Accepts]: Start accepts. Automaton has 1528 states and 5235 transitions. Word has length 21 [2021-06-05 05:37:57,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:37:57,235 INFO L482 AbstractCegarLoop]: Abstraction has 1528 states and 5235 transitions. [2021-06-05 05:37:57,236 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:37:57,236 INFO L276 IsEmpty]: Start isEmpty. Operand 1528 states and 5235 transitions. [2021-06-05 05:37:57,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 05:37:57,238 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:37:57,238 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:37:57,438 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-06-05 05:37:57,439 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:37:57,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:37:57,439 INFO L82 PathProgramCache]: Analyzing trace with hash -355017005, now seen corresponding path program 9 times [2021-06-05 05:37:57,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:37:57,439 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336027941] [2021-06-05 05:37:57,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:37:57,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:37:57,491 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:37:57,491 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:37:57,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336027941] [2021-06-05 05:37:57,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336027941] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:37:57,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972080637] [2021-06-05 05:37:57,491 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:37:57,513 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:37:57,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:37:57,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 05:37:57,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:37:57,587 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:37:57,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [972080637] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:37:57,587 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:37:57,587 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-05 05:37:57,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304392297] [2021-06-05 05:37:57,588 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 05:37:57,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:37:57,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 05:37:57,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-06-05 05:37:57,588 INFO L87 Difference]: Start difference. First operand 1528 states and 5235 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:37:57,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:37:57,641 INFO L93 Difference]: Finished difference Result 1802 states and 6001 transitions. [2021-06-05 05:37:57,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 05:37:57,642 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 05:37:57,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:37:57,646 INFO L225 Difference]: With dead ends: 1802 [2021-06-05 05:37:57,646 INFO L226 Difference]: Without dead ends: 1781 [2021-06-05 05:37:57,647 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 39.5ms TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-06-05 05:37:57,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1781 states. [2021-06-05 05:37:57,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1781 to 1544. [2021-06-05 05:37:57,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1544 states, 1543 states have (on average 3.436811406351264) internal successors, (5303), 1543 states have internal predecessors, (5303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:37:57,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1544 states to 1544 states and 5303 transitions. [2021-06-05 05:37:57,689 INFO L78 Accepts]: Start accepts. Automaton has 1544 states and 5303 transitions. Word has length 21 [2021-06-05 05:37:57,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:37:57,689 INFO L482 AbstractCegarLoop]: Abstraction has 1544 states and 5303 transitions. [2021-06-05 05:37:57,689 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:37:57,689 INFO L276 IsEmpty]: Start isEmpty. Operand 1544 states and 5303 transitions. [2021-06-05 05:37:57,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:37:57,692 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:37:57,692 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:37:57,907 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:37:57,907 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:37:57,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:37:57,908 INFO L82 PathProgramCache]: Analyzing trace with hash -343789315, now seen corresponding path program 10 times [2021-06-05 05:37:57,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:37:57,908 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271181684] [2021-06-05 05:37:57,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:37:57,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:37:57,944 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:37:57,944 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:37:57,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271181684] [2021-06-05 05:37:57,944 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1271181684] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:37:57,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1216763526] [2021-06-05 05:37:57,944 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:37:57,972 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:37:57,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:37:57,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 05:37:57,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:37:58,058 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:37:58,059 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1216763526] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:37:58,059 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:37:58,059 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 05:37:58,059 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975316381] [2021-06-05 05:37:58,059 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 05:37:58,059 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:37:58,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 05:37:58,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-06-05 05:37:58,060 INFO L87 Difference]: Start difference. First operand 1544 states and 5303 transitions. Second operand has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 10 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:37:58,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:37:58,259 INFO L93 Difference]: Finished difference Result 4383 states and 14962 transitions. [2021-06-05 05:37:58,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 05:37:58,260 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 10 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:37:58,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:37:58,273 INFO L225 Difference]: With dead ends: 4383 [2021-06-05 05:37:58,273 INFO L226 Difference]: Without dead ends: 4383 [2021-06-05 05:37:58,273 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 102.9ms TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:37:58,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4383 states. [2021-06-05 05:37:58,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4383 to 2776. [2021-06-05 05:37:58,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2776 states, 2775 states have (on average 3.546666666666667) internal successors, (9842), 2775 states have internal predecessors, (9842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:37:58,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2776 states to 2776 states and 9842 transitions. [2021-06-05 05:37:58,372 INFO L78 Accepts]: Start accepts. Automaton has 2776 states and 9842 transitions. Word has length 23 [2021-06-05 05:37:58,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:37:58,373 INFO L482 AbstractCegarLoop]: Abstraction has 2776 states and 9842 transitions. [2021-06-05 05:37:58,373 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 10 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:37:58,373 INFO L276 IsEmpty]: Start isEmpty. Operand 2776 states and 9842 transitions. [2021-06-05 05:37:58,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:37:58,378 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:37:58,378 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:37:58,592 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:37:58,593 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:37:58,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:37:58,593 INFO L82 PathProgramCache]: Analyzing trace with hash -1351897977, now seen corresponding path program 1 times [2021-06-05 05:37:58,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:37:58,593 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64497708] [2021-06-05 05:37:58,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:37:58,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:37:58,627 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:37:58,627 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:37:58,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64497708] [2021-06-05 05:37:58,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [64497708] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:37:58,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453814182] [2021-06-05 05:37:58,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:37:58,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:37:58,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 05:37:58,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:37:58,736 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:37:58,736 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [453814182] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:37:58,736 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:37:58,736 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 05:37:58,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041309400] [2021-06-05 05:37:58,736 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 05:37:58,736 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:37:58,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 05:37:58,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-06-05 05:37:58,737 INFO L87 Difference]: Start difference. First operand 2776 states and 9842 transitions. Second operand has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:37:58,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:37:58,915 INFO L93 Difference]: Finished difference Result 6576 states and 23416 transitions. [2021-06-05 05:37:58,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 05:37:58,915 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:37:58,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:37:58,935 INFO L225 Difference]: With dead ends: 6576 [2021-06-05 05:37:58,935 INFO L226 Difference]: Without dead ends: 6576 [2021-06-05 05:37:58,936 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 115.5ms TimeCoverageRelationStatistics Valid=102, Invalid=204, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:37:58,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6576 states. [2021-06-05 05:37:59,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6576 to 4642. [2021-06-05 05:37:59,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4642 states, 4641 states have (on average 3.6181857358327947) internal successors, (16792), 4641 states have internal predecessors, (16792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:37:59,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4642 states to 4642 states and 16792 transitions. [2021-06-05 05:37:59,054 INFO L78 Accepts]: Start accepts. Automaton has 4642 states and 16792 transitions. Word has length 23 [2021-06-05 05:37:59,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:37:59,054 INFO L482 AbstractCegarLoop]: Abstraction has 4642 states and 16792 transitions. [2021-06-05 05:37:59,054 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:37:59,054 INFO L276 IsEmpty]: Start isEmpty. Operand 4642 states and 16792 transitions. [2021-06-05 05:37:59,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:37:59,063 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:37:59,063 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:37:59,286 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-06-05 05:37:59,286 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:37:59,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:37:59,286 INFO L82 PathProgramCache]: Analyzing trace with hash -1067499911, now seen corresponding path program 11 times [2021-06-05 05:37:59,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:37:59,287 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295870730] [2021-06-05 05:37:59,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:37:59,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:37:59,315 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:37:59,315 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:37:59,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295870730] [2021-06-05 05:37:59,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295870730] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:37:59,316 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1803341369] [2021-06-05 05:37:59,316 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:37:59,339 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 05:37:59,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:37:59,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 05:37:59,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:37:59,425 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:37:59,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1803341369] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:37:59,426 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:37:59,426 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-06-05 05:37:59,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184361934] [2021-06-05 05:37:59,426 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 05:37:59,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:37:59,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 05:37:59,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-06-05 05:37:59,427 INFO L87 Difference]: Start difference. First operand 4642 states and 16792 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:37:59,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:37:59,600 INFO L93 Difference]: Finished difference Result 6297 states and 22107 transitions. [2021-06-05 05:37:59,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 05:37:59,601 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:37:59,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:37:59,641 INFO L225 Difference]: With dead ends: 6297 [2021-06-05 05:37:59,641 INFO L226 Difference]: Without dead ends: 6289 [2021-06-05 05:37:59,641 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 100.1ms TimeCoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2021-06-05 05:37:59,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6289 states. [2021-06-05 05:37:59,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6289 to 5484. [2021-06-05 05:37:59,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5484 states, 5483 states have (on average 3.6122560641984314) internal successors, (19806), 5483 states have internal predecessors, (19806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:37:59,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5484 states to 5484 states and 19806 transitions. [2021-06-05 05:37:59,752 INFO L78 Accepts]: Start accepts. Automaton has 5484 states and 19806 transitions. Word has length 23 [2021-06-05 05:37:59,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:37:59,752 INFO L482 AbstractCegarLoop]: Abstraction has 5484 states and 19806 transitions. [2021-06-05 05:37:59,752 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:37:59,752 INFO L276 IsEmpty]: Start isEmpty. Operand 5484 states and 19806 transitions. [2021-06-05 05:37:59,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:37:59,763 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:37:59,763 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:37:59,984 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:37:59,985 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:37:59,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:37:59,985 INFO L82 PathProgramCache]: Analyzing trace with hash 1815799673, now seen corresponding path program 2 times [2021-06-05 05:37:59,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:37:59,985 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173547989] [2021-06-05 05:37:59,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:37:59,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:38:00,019 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:38:00,019 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:38:00,019 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173547989] [2021-06-05 05:38:00,019 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173547989] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:38:00,019 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1030844173] [2021-06-05 05:38:00,019 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 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:38:00,042 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:38:00,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:38:00,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 05:38:00,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:38:00,125 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:38:00,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1030844173] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:38:00,125 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:38:00,125 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 05:38:00,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666089551] [2021-06-05 05:38:00,125 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 05:38:00,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:38:00,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 05:38:00,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-06-05 05:38:00,126 INFO L87 Difference]: Start difference. First operand 5484 states and 19806 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:38:00,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:38:00,335 INFO L93 Difference]: Finished difference Result 8906 states and 31694 transitions. [2021-06-05 05:38:00,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 05:38:00,335 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:38:00,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:38:00,349 INFO L225 Difference]: With dead ends: 8906 [2021-06-05 05:38:00,350 INFO L226 Difference]: Without dead ends: 8900 [2021-06-05 05:38:00,350 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 127.6ms TimeCoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:38:00,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8900 states. [2021-06-05 05:38:00,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8900 to 8072. [2021-06-05 05:38:00,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8072 states, 8071 states have (on average 3.62644034196506) internal successors, (29269), 8071 states have internal predecessors, (29269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:38:00,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8072 states to 8072 states and 29269 transitions. [2021-06-05 05:38:00,579 INFO L78 Accepts]: Start accepts. Automaton has 8072 states and 29269 transitions. Word has length 23 [2021-06-05 05:38:00,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:38:00,579 INFO L482 AbstractCegarLoop]: Abstraction has 8072 states and 29269 transitions. [2021-06-05 05:38:00,579 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:38:00,579 INFO L276 IsEmpty]: Start isEmpty. Operand 8072 states and 29269 transitions. [2021-06-05 05:38:00,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:38:00,597 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:38:00,597 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:38:00,811 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-06-05 05:38:00,811 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:38:00,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:38:00,812 INFO L82 PathProgramCache]: Analyzing trace with hash -1500610179, now seen corresponding path program 3 times [2021-06-05 05:38:00,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:38:00,812 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973401341] [2021-06-05 05:38:00,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:38:00,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:38:00,852 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:38:00,853 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:38:00,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973401341] [2021-06-05 05:38:00,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973401341] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:38:00,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [57591523] [2021-06-05 05:38:00,853 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 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:38:00,877 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:38:00,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:38:00,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 05:38:00,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:38:00,954 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:38:00,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [57591523] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:38:00,955 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:38:00,955 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 05:38:00,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331963086] [2021-06-05 05:38:00,955 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 05:38:00,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:38:00,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 05:38:00,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-06-05 05:38:00,956 INFO L87 Difference]: Start difference. First operand 8072 states and 29269 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:38:01,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:38:01,167 INFO L93 Difference]: Finished difference Result 12359 states and 43995 transitions. [2021-06-05 05:38:01,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 05:38:01,168 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:38:01,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:38:01,189 INFO L225 Difference]: With dead ends: 12359 [2021-06-05 05:38:01,189 INFO L226 Difference]: Without dead ends: 12359 [2021-06-05 05:38:01,189 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 116.1ms TimeCoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2021-06-05 05:38:01,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12359 states. [2021-06-05 05:38:01,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12359 to 11076. [2021-06-05 05:38:01,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11076 states, 11075 states have (on average 3.61941309255079) internal successors, (40085), 11075 states have internal predecessors, (40085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:38:01,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11076 states to 11076 states and 40085 transitions. [2021-06-05 05:38:01,492 INFO L78 Accepts]: Start accepts. Automaton has 11076 states and 40085 transitions. Word has length 23 [2021-06-05 05:38:01,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:38:01,492 INFO L482 AbstractCegarLoop]: Abstraction has 11076 states and 40085 transitions. [2021-06-05 05:38:01,492 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:38:01,492 INFO L276 IsEmpty]: Start isEmpty. Operand 11076 states and 40085 transitions. [2021-06-05 05:38:01,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:38:01,528 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:38:01,528 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:38:01,750 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:38:01,751 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:38:01,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:38:01,751 INFO L82 PathProgramCache]: Analyzing trace with hash -1194375559, now seen corresponding path program 12 times [2021-06-05 05:38:01,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:38:01,751 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213580003] [2021-06-05 05:38:01,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:38:01,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:38:01,833 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:38:01,834 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:38:01,834 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213580003] [2021-06-05 05:38:01,834 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213580003] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:38:01,834 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1039743117] [2021-06-05 05:38:01,834 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 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:38:01,856 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:38:01,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:38:01,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 05:38:01,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:38:01,938 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:38:01,939 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1039743117] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:38:01,939 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:38:01,939 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-06-05 05:38:01,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418738980] [2021-06-05 05:38:01,939 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 05:38:01,939 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:38:01,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 05:38:01,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-06-05 05:38:01,939 INFO L87 Difference]: Start difference. First operand 11076 states and 40085 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:38:02,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:38:02,107 INFO L93 Difference]: Finished difference Result 11482 states and 41093 transitions. [2021-06-05 05:38:02,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 05:38:02,107 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:38:02,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:38:02,129 INFO L225 Difference]: With dead ends: 11482 [2021-06-05 05:38:02,130 INFO L226 Difference]: Without dead ends: 11472 [2021-06-05 05:38:02,130 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 85.1ms TimeCoverageRelationStatistics Valid=80, Invalid=130, Unknown=0, NotChecked=0, Total=210 [2021-06-05 05:38:02,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11472 states. [2021-06-05 05:38:02,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11472 to 11074. [2021-06-05 05:38:02,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11074 states, 11073 states have (on average 3.6193443511243566) internal successors, (40077), 11073 states have internal predecessors, (40077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:38:02,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11074 states to 11074 states and 40077 transitions. [2021-06-05 05:38:02,399 INFO L78 Accepts]: Start accepts. Automaton has 11074 states and 40077 transitions. Word has length 23 [2021-06-05 05:38:02,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:38:02,400 INFO L482 AbstractCegarLoop]: Abstraction has 11074 states and 40077 transitions. [2021-06-05 05:38:02,400 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:38:02,400 INFO L276 IsEmpty]: Start isEmpty. Operand 11074 states and 40077 transitions. [2021-06-05 05:38:02,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:38:02,421 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:38:02,421 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:38:02,640 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-06-05 05:38:02,641 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:38:02,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:38:02,641 INFO L82 PathProgramCache]: Analyzing trace with hash 713885521, now seen corresponding path program 4 times [2021-06-05 05:38:02,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:38:02,641 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859030660] [2021-06-05 05:38:02,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:38:02,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:38:02,680 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:38:02,680 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:38:02,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859030660] [2021-06-05 05:38:02,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859030660] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:38:02,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [299816187] [2021-06-05 05:38:02,681 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:38:02,704 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:38:02,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:38:02,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 05:38:02,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:38:02,789 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:38:02,789 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [299816187] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:38:02,789 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:38:02,789 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 05:38:02,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417354778] [2021-06-05 05:38:02,790 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 05:38:02,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:38:02,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 05:38:02,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-06-05 05:38:02,791 INFO L87 Difference]: Start difference. First operand 11074 states and 40077 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:38:03,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:38:03,091 INFO L93 Difference]: Finished difference Result 16493 states and 59103 transitions. [2021-06-05 05:38:03,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 05:38:03,098 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:38:03,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:38:03,133 INFO L225 Difference]: With dead ends: 16493 [2021-06-05 05:38:03,134 INFO L226 Difference]: Without dead ends: 16493 [2021-06-05 05:38:03,134 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 101.7ms TimeCoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:38:03,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16493 states. [2021-06-05 05:38:03,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16493 to 7965. [2021-06-05 05:38:03,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7965 states, 7964 states have (on average 3.605474635861376) internal successors, (28714), 7964 states have internal predecessors, (28714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:38:03,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7965 states to 7965 states and 28714 transitions. [2021-06-05 05:38:03,374 INFO L78 Accepts]: Start accepts. Automaton has 7965 states and 28714 transitions. Word has length 23 [2021-06-05 05:38:03,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:38:03,374 INFO L482 AbstractCegarLoop]: Abstraction has 7965 states and 28714 transitions. [2021-06-05 05:38:03,374 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:38:03,374 INFO L276 IsEmpty]: Start isEmpty. Operand 7965 states and 28714 transitions. [2021-06-05 05:38:03,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:38:03,389 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:38:03,389 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:38:03,592 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-06-05 05:38:03,593 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:38:03,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:38:03,593 INFO L82 PathProgramCache]: Analyzing trace with hash 1264317309, now seen corresponding path program 13 times [2021-06-05 05:38:03,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:38:03,593 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227661864] [2021-06-05 05:38:03,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:38:03,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:38:03,620 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:38:03,620 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:38:03,620 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227661864] [2021-06-05 05:38:03,620 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227661864] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:38:03,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276209277] [2021-06-05 05:38:03,621 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:38:03,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:38:03,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 05:38:03,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:38:03,715 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:38:03,715 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1276209277] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:38:03,715 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:38:03,715 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-06-05 05:38:03,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497914798] [2021-06-05 05:38:03,716 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 05:38:03,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:38:03,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 05:38:03,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-06-05 05:38:03,716 INFO L87 Difference]: Start difference. First operand 7965 states and 28714 transitions. Second operand has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:38:03,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:38:03,973 INFO L93 Difference]: Finished difference Result 8444 states and 29934 transitions. [2021-06-05 05:38:03,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 05:38:03,973 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:38:03,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:38:03,986 INFO L225 Difference]: With dead ends: 8444 [2021-06-05 05:38:03,986 INFO L226 Difference]: Without dead ends: 8414 [2021-06-05 05:38:03,986 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 104.0ms TimeCoverageRelationStatistics Valid=106, Invalid=200, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:38:03,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8414 states. [2021-06-05 05:38:04,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8414 to 7984. [2021-06-05 05:38:04,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7984 states, 7983 states have (on average 3.5968933984717526) internal successors, (28714), 7983 states have internal predecessors, (28714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:38:04,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7984 states to 7984 states and 28714 transitions. [2021-06-05 05:38:04,187 INFO L78 Accepts]: Start accepts. Automaton has 7984 states and 28714 transitions. Word has length 23 [2021-06-05 05:38:04,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:38:04,188 INFO L482 AbstractCegarLoop]: Abstraction has 7984 states and 28714 transitions. [2021-06-05 05:38:04,188 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:38:04,188 INFO L276 IsEmpty]: Start isEmpty. Operand 7984 states and 28714 transitions. [2021-06-05 05:38:04,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:38:04,201 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:38:04,201 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:38:04,408 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-06-05 05:38:04,409 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:38:04,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:38:04,409 INFO L82 PathProgramCache]: Analyzing trace with hash -541652355, now seen corresponding path program 14 times [2021-06-05 05:38:04,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:38:04,409 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237422265] [2021-06-05 05:38:04,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:38:04,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:38:04,449 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:38:04,449 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:38:04,449 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237422265] [2021-06-05 05:38:04,449 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1237422265] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:38:04,449 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [426049414] [2021-06-05 05:38:04,449 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 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:38:04,475 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:38:04,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:38:04,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 05:38:04,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:38:04,558 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:38:04,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [426049414] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:38:04,558 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:38:04,558 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2021-06-05 05:38:04,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813319720] [2021-06-05 05:38:04,559 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 05:38:04,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:38:04,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 05:38:04,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-06-05 05:38:04,559 INFO L87 Difference]: Start difference. First operand 7984 states and 28714 transitions. Second operand has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:38:04,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:38:04,809 INFO L93 Difference]: Finished difference Result 8606 states and 30521 transitions. [2021-06-05 05:38:04,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 05:38:04,809 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:38:04,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:38:04,829 INFO L225 Difference]: With dead ends: 8606 [2021-06-05 05:38:04,829 INFO L226 Difference]: Without dead ends: 8543 [2021-06-05 05:38:04,830 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 98.9ms TimeCoverageRelationStatistics Valid=85, Invalid=187, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:38:04,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8543 states. [2021-06-05 05:38:05,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8543 to 8052. [2021-06-05 05:38:05,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8052 states, 8051 states have (on average 3.5914793193392125) internal successors, (28915), 8051 states have internal predecessors, (28915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:38:05,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8052 states to 8052 states and 28915 transitions. [2021-06-05 05:38:05,065 INFO L78 Accepts]: Start accepts. Automaton has 8052 states and 28915 transitions. Word has length 23 [2021-06-05 05:38:05,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:38:05,065 INFO L482 AbstractCegarLoop]: Abstraction has 8052 states and 28915 transitions. [2021-06-05 05:38:05,065 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:38:05,065 INFO L276 IsEmpty]: Start isEmpty. Operand 8052 states and 28915 transitions. [2021-06-05 05:38:05,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:38:05,077 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:38:05,077 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:38:05,278 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-06-05 05:38:05,278 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:38:05,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:38:05,278 INFO L82 PathProgramCache]: Analyzing trace with hash 732469559, now seen corresponding path program 5 times [2021-06-05 05:38:05,278 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:38:05,278 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142939251] [2021-06-05 05:38:05,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:38:05,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:38:05,358 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:38:05,358 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:38:05,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142939251] [2021-06-05 05:38:05,358 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142939251] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:38:05,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1258379048] [2021-06-05 05:38:05,358 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:38:05,382 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:38:05,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:38:05,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 05:38:05,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:38:05,470 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:38:05,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1258379048] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:38:05,470 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:38:05,470 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 05:38:05,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736696472] [2021-06-05 05:38:05,470 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 05:38:05,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:38:05,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 05:38:05,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-06-05 05:38:05,471 INFO L87 Difference]: Start difference. First operand 8052 states and 28915 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:38:05,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:38:05,622 INFO L93 Difference]: Finished difference Result 8205 states and 29288 transitions. [2021-06-05 05:38:05,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 05:38:05,622 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 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 [2021-06-05 05:38:05,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:38:05,637 INFO L225 Difference]: With dead ends: 8205 [2021-06-05 05:38:05,637 INFO L226 Difference]: Without dead ends: 8172 [2021-06-05 05:38:05,637 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 115.1ms TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-06-05 05:38:05,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8172 states. [2021-06-05 05:38:05,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8172 to 8077. [2021-06-05 05:38:05,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8077 states, 8076 states have (on average 3.5898959881129273) internal successors, (28992), 8076 states have internal predecessors, (28992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:38:05,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8077 states to 8077 states and 28992 transitions. [2021-06-05 05:38:05,809 INFO L78 Accepts]: Start accepts. Automaton has 8077 states and 28992 transitions. Word has length 23 [2021-06-05 05:38:05,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:38:05,809 INFO L482 AbstractCegarLoop]: Abstraction has 8077 states and 28992 transitions. [2021-06-05 05:38:05,809 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:38:05,809 INFO L276 IsEmpty]: Start isEmpty. Operand 8077 states and 28992 transitions. [2021-06-05 05:38:05,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:38:05,818 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:38:05,818 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:38:06,018 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-06-05 05:38:06,019 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:38:06,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:38:06,019 INFO L82 PathProgramCache]: Analyzing trace with hash -66570445, now seen corresponding path program 6 times [2021-06-05 05:38:06,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:38:06,019 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259942800] [2021-06-05 05:38:06,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:38:06,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:38:06,079 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:38:06,080 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:38:06,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259942800] [2021-06-05 05:38:06,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259942800] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:38:06,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2015681136] [2021-06-05 05:38:06,080 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:38:06,102 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:38:06,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:38:06,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 05:38:06,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:38:06,222 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:38:06,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2015681136] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:38:06,223 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:38:06,223 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 05:38:06,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691892367] [2021-06-05 05:38:06,223 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 05:38:06,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:38:06,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 05:38:06,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-06-05 05:38:06,223 INFO L87 Difference]: Start difference. First operand 8077 states and 28992 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:38:06,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:38:06,423 INFO L93 Difference]: Finished difference Result 10295 states and 36666 transitions. [2021-06-05 05:38:06,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 05:38:06,424 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:38:06,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:38:06,442 INFO L225 Difference]: With dead ends: 10295 [2021-06-05 05:38:06,442 INFO L226 Difference]: Without dead ends: 10247 [2021-06-05 05:38:06,442 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 126.2ms TimeCoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2021-06-05 05:38:06,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10247 states. [2021-06-05 05:38:06,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10247 to 8072. [2021-06-05 05:38:06,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8072 states, 8071 states have (on average 3.5903853301945237) internal successors, (28978), 8071 states have internal predecessors, (28978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:38:06,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8072 states to 8072 states and 28978 transitions. [2021-06-05 05:38:06,662 INFO L78 Accepts]: Start accepts. Automaton has 8072 states and 28978 transitions. Word has length 23 [2021-06-05 05:38:06,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:38:06,662 INFO L482 AbstractCegarLoop]: Abstraction has 8072 states and 28978 transitions. [2021-06-05 05:38:06,662 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:38:06,662 INFO L276 IsEmpty]: Start isEmpty. Operand 8072 states and 28978 transitions. [2021-06-05 05:38:06,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:38:06,673 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:38:06,673 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:38:06,876 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-06-05 05:38:06,877 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:38:06,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:38:06,877 INFO L82 PathProgramCache]: Analyzing trace with hash -147969501, now seen corresponding path program 7 times [2021-06-05 05:38:06,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:38:06,877 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202729046] [2021-06-05 05:38:06,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:38:06,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:38:06,965 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:38:06,966 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:38:06,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202729046] [2021-06-05 05:38:06,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202729046] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:38:06,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1196059864] [2021-06-05 05:38:06,966 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:38:06,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:38:07,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 05:38:07,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:38:07,137 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:38:07,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1196059864] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:38:07,137 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:38:07,137 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-06-05 05:38:07,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272318063] [2021-06-05 05:38:07,137 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 05:38:07,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:38:07,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 05:38:07,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2021-06-05 05:38:07,138 INFO L87 Difference]: Start difference. First operand 8072 states and 28978 transitions. Second operand has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:38:07,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:38:07,418 INFO L93 Difference]: Finished difference Result 10743 states and 38081 transitions. [2021-06-05 05:38:07,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 05:38:07,419 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:38:07,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:38:07,435 INFO L225 Difference]: With dead ends: 10743 [2021-06-05 05:38:07,436 INFO L226 Difference]: Without dead ends: 10695 [2021-06-05 05:38:07,436 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 190.4ms TimeCoverageRelationStatistics Valid=96, Invalid=246, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:38:07,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10695 states. [2021-06-05 05:38:07,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10695 to 8069. [2021-06-05 05:38:07,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8069 states, 8068 states have (on average 3.5909766980664353) internal successors, (28972), 8068 states have internal predecessors, (28972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:38:07,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8069 states to 8069 states and 28972 transitions. [2021-06-05 05:38:07,656 INFO L78 Accepts]: Start accepts. Automaton has 8069 states and 28972 transitions. Word has length 23 [2021-06-05 05:38:07,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:38:07,656 INFO L482 AbstractCegarLoop]: Abstraction has 8069 states and 28972 transitions. [2021-06-05 05:38:07,656 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:38:07,657 INFO L276 IsEmpty]: Start isEmpty. Operand 8069 states and 28972 transitions. [2021-06-05 05:38:07,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:38:07,667 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:38:07,667 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:38:07,884 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-06-05 05:38:07,885 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:38:07,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:38:07,885 INFO L82 PathProgramCache]: Analyzing trace with hash 265646431, now seen corresponding path program 8 times [2021-06-05 05:38:07,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:38:07,885 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333797770] [2021-06-05 05:38:07,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:38:07,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:38:07,962 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:38:07,963 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:38:07,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333797770] [2021-06-05 05:38:07,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333797770] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:38:07,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2128285589] [2021-06-05 05:38:07,963 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 [2021-06-05 05:38:08,001 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:38:08,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:38:08,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 05:38:08,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:38:08,147 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:38:08,147 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2128285589] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:38:08,147 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:38:08,147 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-06-05 05:38:08,147 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820741487] [2021-06-05 05:38:08,148 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 05:38:08,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:38:08,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 05:38:08,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-06-05 05:38:08,148 INFO L87 Difference]: Start difference. First operand 8069 states and 28972 transitions. Second operand has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:38:08,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:38:08,445 INFO L93 Difference]: Finished difference Result 10785 states and 38212 transitions. [2021-06-05 05:38:08,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 05:38:08,445 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:38:08,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:38:08,463 INFO L225 Difference]: With dead ends: 10785 [2021-06-05 05:38:08,463 INFO L226 Difference]: Without dead ends: 10737 [2021-06-05 05:38:08,464 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 236.6ms TimeCoverageRelationStatistics Valid=117, Invalid=303, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:38:08,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10737 states. [2021-06-05 05:38:08,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10737 to 8068. [2021-06-05 05:38:08,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8068 states, 8067 states have (on average 3.591421842072642) internal successors, (28972), 8067 states have internal predecessors, (28972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:38:08,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8068 states to 8068 states and 28972 transitions. [2021-06-05 05:38:08,621 INFO L78 Accepts]: Start accepts. Automaton has 8068 states and 28972 transitions. Word has length 23 [2021-06-05 05:38:08,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:38:08,621 INFO L482 AbstractCegarLoop]: Abstraction has 8068 states and 28972 transitions. [2021-06-05 05:38:08,621 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:38:08,621 INFO L276 IsEmpty]: Start isEmpty. Operand 8068 states and 28972 transitions. [2021-06-05 05:38:08,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:38:08,716 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:38:08,716 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:38:08,916 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-06-05 05:38:08,916 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:38:08,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:38:08,917 INFO L82 PathProgramCache]: Analyzing trace with hash -418348287, now seen corresponding path program 9 times [2021-06-05 05:38:08,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:38:08,917 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223093706] [2021-06-05 05:38:08,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:38:08,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:38:08,979 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:38:08,979 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:38:08,979 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223093706] [2021-06-05 05:38:08,980 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223093706] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:38:08,980 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [643663303] [2021-06-05 05:38:08,980 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 [2021-06-05 05:38:09,001 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 05:38:09,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:38:09,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 05:38:09,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:38:09,085 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:38:09,086 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [643663303] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:38:09,086 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:38:09,086 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 05:38:09,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913150032] [2021-06-05 05:38:09,086 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 05:38:09,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:38:09,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 05:38:09,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-06-05 05:38:09,087 INFO L87 Difference]: Start difference. First operand 8068 states and 28972 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:38:09,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:38:09,263 INFO L93 Difference]: Finished difference Result 8314 states and 29600 transitions. [2021-06-05 05:38:09,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 05:38:09,263 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:38:09,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:38:09,276 INFO L225 Difference]: With dead ends: 8314 [2021-06-05 05:38:09,276 INFO L226 Difference]: Without dead ends: 8255 [2021-06-05 05:38:09,276 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 112.1ms TimeCoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-06-05 05:38:09,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8255 states. [2021-06-05 05:38:09,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8255 to 8137. [2021-06-05 05:38:09,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8137 states, 8136 states have (on average 3.587266470009833) internal successors, (29186), 8136 states have internal predecessors, (29186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:38:09,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8137 states to 8137 states and 29186 transitions. [2021-06-05 05:38:09,386 INFO L78 Accepts]: Start accepts. Automaton has 8137 states and 29186 transitions. Word has length 23 [2021-06-05 05:38:09,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:38:09,386 INFO L482 AbstractCegarLoop]: Abstraction has 8137 states and 29186 transitions. [2021-06-05 05:38:09,386 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:38:09,386 INFO L276 IsEmpty]: Start isEmpty. Operand 8137 states and 29186 transitions. [2021-06-05 05:38:09,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:38:09,399 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:38:09,399 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:38:09,612 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-06-05 05:38:09,613 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:38:09,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:38:09,613 INFO L82 PathProgramCache]: Analyzing trace with hash -1217388291, now seen corresponding path program 10 times [2021-06-05 05:38:09,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:38:09,613 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589355102] [2021-06-05 05:38:09,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:38:09,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:38:09,677 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:38:09,678 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:38:09,678 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589355102] [2021-06-05 05:38:09,678 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589355102] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:38:09,678 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1103950861] [2021-06-05 05:38:09,678 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 [2021-06-05 05:38:09,713 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:38:09,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:38:09,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 05:38:09,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:38:09,829 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:38:09,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1103950861] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:38:09,829 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:38:09,829 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 05:38:09,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675531927] [2021-06-05 05:38:09,830 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 05:38:09,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:38:09,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 05:38:09,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-06-05 05:38:09,830 INFO L87 Difference]: Start difference. First operand 8137 states and 29186 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:38:10,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:38:10,108 INFO L93 Difference]: Finished difference Result 10367 states and 36899 transitions. [2021-06-05 05:38:10,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 05:38:10,109 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:38:10,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:38:10,131 INFO L225 Difference]: With dead ends: 10367 [2021-06-05 05:38:10,131 INFO L226 Difference]: Without dead ends: 10321 [2021-06-05 05:38:10,131 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 134.5ms TimeCoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2021-06-05 05:38:10,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10321 states. [2021-06-05 05:38:10,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10321 to 8140. [2021-06-05 05:38:10,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8140 states, 8139 states have (on average 3.5897530409141174) internal successors, (29217), 8139 states have internal predecessors, (29217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:38:10,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8140 states to 8140 states and 29217 transitions. [2021-06-05 05:38:10,273 INFO L78 Accepts]: Start accepts. Automaton has 8140 states and 29217 transitions. Word has length 23 [2021-06-05 05:38:10,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:38:10,273 INFO L482 AbstractCegarLoop]: Abstraction has 8140 states and 29217 transitions. [2021-06-05 05:38:10,274 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:38:10,274 INFO L276 IsEmpty]: Start isEmpty. Operand 8140 states and 29217 transitions. [2021-06-05 05:38:10,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:38:10,283 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:38:10,283 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:38:10,484 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:38:10,484 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:38:10,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:38:10,485 INFO L82 PathProgramCache]: Analyzing trace with hash -1298787347, now seen corresponding path program 11 times [2021-06-05 05:38:10,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:38:10,485 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723872464] [2021-06-05 05:38:10,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:38:10,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:38:10,547 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:38:10,547 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:38:10,547 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723872464] [2021-06-05 05:38:10,547 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [723872464] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:38:10,547 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25944056] [2021-06-05 05:38:10,548 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 [2021-06-05 05:38:10,570 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:38:10,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:38:10,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 05:38:10,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:38:10,696 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:38:10,697 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [25944056] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:38:10,697 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:38:10,697 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 05:38:10,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893437589] [2021-06-05 05:38:10,697 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 05:38:10,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:38:10,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 05:38:10,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-06-05 05:38:10,698 INFO L87 Difference]: Start difference. First operand 8140 states and 29217 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:38:10,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:38:10,950 INFO L93 Difference]: Finished difference Result 10852 states and 38322 transitions. [2021-06-05 05:38:10,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 05:38:10,950 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:38:10,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:38:10,967 INFO L225 Difference]: With dead ends: 10852 [2021-06-05 05:38:10,967 INFO L226 Difference]: Without dead ends: 10785 [2021-06-05 05:38:10,967 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 191.5ms TimeCoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:38:10,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10785 states. [2021-06-05 05:38:11,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10785 to 8157. [2021-06-05 05:38:11,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8157 states, 8156 states have (on average 3.5922020598332516) internal successors, (29298), 8156 states have internal predecessors, (29298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:38:11,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8157 states to 8157 states and 29298 transitions. [2021-06-05 05:38:11,147 INFO L78 Accepts]: Start accepts. Automaton has 8157 states and 29298 transitions. Word has length 23 [2021-06-05 05:38:11,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:38:11,147 INFO L482 AbstractCegarLoop]: Abstraction has 8157 states and 29298 transitions. [2021-06-05 05:38:11,147 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:38:11,147 INFO L276 IsEmpty]: Start isEmpty. Operand 8157 states and 29298 transitions. [2021-06-05 05:38:11,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:38:11,158 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:38:11,158 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:38:11,358 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2021-06-05 05:38:11,358 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:38:11,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:38:11,359 INFO L82 PathProgramCache]: Analyzing trace with hash 1071003837, now seen corresponding path program 12 times [2021-06-05 05:38:11,359 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:38:11,359 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372397192] [2021-06-05 05:38:11,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:38:11,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:38:11,440 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:38:11,440 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:38:11,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372397192] [2021-06-05 05:38:11,440 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372397192] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:38:11,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [931149001] [2021-06-05 05:38:11,440 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 [2021-06-05 05:38:11,462 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:38:11,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:38:11,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 05:38:11,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:38:11,533 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:38:11,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [931149001] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:38:11,533 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:38:11,533 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-06-05 05:38:11,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189192051] [2021-06-05 05:38:11,533 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 05:38:11,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:38:11,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 05:38:11,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-06-05 05:38:11,534 INFO L87 Difference]: Start difference. First operand 8157 states and 29298 transitions. Second operand has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:38:11,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:38:11,697 INFO L93 Difference]: Finished difference Result 8303 states and 29650 transitions. [2021-06-05 05:38:11,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 05:38:11,698 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:38:11,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:38:11,710 INFO L225 Difference]: With dead ends: 8303 [2021-06-05 05:38:11,710 INFO L226 Difference]: Without dead ends: 8248 [2021-06-05 05:38:11,710 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 107.1ms TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-06-05 05:38:11,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8248 states. [2021-06-05 05:38:11,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8248 to 8175. [2021-06-05 05:38:11,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8175 states, 8174 states have (on average 3.5910203082945924) internal successors, (29353), 8174 states have internal predecessors, (29353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:38:11,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8175 states to 8175 states and 29353 transitions. [2021-06-05 05:38:11,820 INFO L78 Accepts]: Start accepts. Automaton has 8175 states and 29353 transitions. Word has length 23 [2021-06-05 05:38:11,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:38:11,821 INFO L482 AbstractCegarLoop]: Abstraction has 8175 states and 29353 transitions. [2021-06-05 05:38:11,821 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:38:11,821 INFO L276 IsEmpty]: Start isEmpty. Operand 8175 states and 29353 transitions. [2021-06-05 05:38:11,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:38:11,830 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:38:11,831 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:38:12,031 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:38:12,031 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:38:12,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:38:12,031 INFO L82 PathProgramCache]: Analyzing trace with hash 271963833, now seen corresponding path program 13 times [2021-06-05 05:38:12,032 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:38:12,032 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399973910] [2021-06-05 05:38:12,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:38:12,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:38:12,105 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:38:12,105 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:38:12,105 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399973910] [2021-06-05 05:38:12,105 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399973910] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:38:12,105 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2138855478] [2021-06-05 05:38:12,105 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 [2021-06-05 05:38:12,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:38:12,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 05:38:12,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:38:12,211 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:38:12,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2138855478] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:38:12,211 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:38:12,211 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 05:38:12,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966918498] [2021-06-05 05:38:12,211 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 05:38:12,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:38:12,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 05:38:12,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-06-05 05:38:12,212 INFO L87 Difference]: Start difference. First operand 8175 states and 29353 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:38:12,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:38:12,390 INFO L93 Difference]: Finished difference Result 10332 states and 36818 transitions. [2021-06-05 05:38:12,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 05:38:12,391 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:38:12,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:38:12,409 INFO L225 Difference]: With dead ends: 10332 [2021-06-05 05:38:12,410 INFO L226 Difference]: Without dead ends: 10286 [2021-06-05 05:38:12,410 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 135.6ms TimeCoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2021-06-05 05:38:12,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10286 states. [2021-06-05 05:38:12,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10286 to 8171. [2021-06-05 05:38:12,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8171 states, 8170 states have (on average 3.591309669522644) internal successors, (29341), 8170 states have internal predecessors, (29341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:38:12,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8171 states to 8171 states and 29341 transitions. [2021-06-05 05:38:12,572 INFO L78 Accepts]: Start accepts. Automaton has 8171 states and 29341 transitions. Word has length 23 [2021-06-05 05:38:12,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:38:12,572 INFO L482 AbstractCegarLoop]: Abstraction has 8171 states and 29341 transitions. [2021-06-05 05:38:12,572 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:38:12,572 INFO L276 IsEmpty]: Start isEmpty. Operand 8171 states and 29341 transitions. [2021-06-05 05:38:12,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:38:12,582 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:38:12,582 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:38:12,782 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-06-05 05:38:12,783 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:38:12,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:38:12,783 INFO L82 PathProgramCache]: Analyzing trace with hash 11839967, now seen corresponding path program 14 times [2021-06-05 05:38:12,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:38:12,783 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034317542] [2021-06-05 05:38:12,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:38:12,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:38:12,879 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:38:12,879 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:38:12,879 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034317542] [2021-06-05 05:38:12,879 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034317542] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:38:12,880 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754419830] [2021-06-05 05:38:12,880 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:38:12,904 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:38:12,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:38:12,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 05:38:12,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:38:12,977 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:38:12,977 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [754419830] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:38:12,977 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:38:12,977 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-06-05 05:38:12,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244093889] [2021-06-05 05:38:12,977 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 05:38:12,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:38:12,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 05:38:12,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-06-05 05:38:12,978 INFO L87 Difference]: Start difference. First operand 8171 states and 29341 transitions. Second operand has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:38:13,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:38:13,131 INFO L93 Difference]: Finished difference Result 8275 states and 29573 transitions. [2021-06-05 05:38:13,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 05:38:13,132 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:38:13,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:38:13,146 INFO L225 Difference]: With dead ends: 8275 [2021-06-05 05:38:13,146 INFO L226 Difference]: Without dead ends: 8232 [2021-06-05 05:38:13,146 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 119.1ms TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-05 05:38:13,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8232 states. [2021-06-05 05:38:13,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8232 to 8175. [2021-06-05 05:38:13,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8175 states, 8174 states have (on average 3.5902862735502814) internal successors, (29347), 8174 states have internal predecessors, (29347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:38:13,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8175 states to 8175 states and 29347 transitions. [2021-06-05 05:38:13,299 INFO L78 Accepts]: Start accepts. Automaton has 8175 states and 29347 transitions. Word has length 23 [2021-06-05 05:38:13,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:38:13,299 INFO L482 AbstractCegarLoop]: Abstraction has 8175 states and 29347 transitions. [2021-06-05 05:38:13,299 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:38:13,299 INFO L276 IsEmpty]: Start isEmpty. Operand 8175 states and 29347 transitions. [2021-06-05 05:38:13,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:38:13,310 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:38:13,310 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:38:13,511 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2021-06-05 05:38:13,511 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:38:13,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:38:13,511 INFO L82 PathProgramCache]: Analyzing trace with hash 33595821, now seen corresponding path program 15 times [2021-06-05 05:38:13,511 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:38:13,512 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561343267] [2021-06-05 05:38:13,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:38:13,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:38:13,560 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:38:13,560 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:38:13,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561343267] [2021-06-05 05:38:13,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561343267] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:38:13,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [856099753] [2021-06-05 05:38:13,560 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:38:13,585 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 05:38:13,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:38:13,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 05:38:13,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:38:13,638 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:38:13,638 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [856099753] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:38:13,638 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:38:13,638 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-06-05 05:38:13,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854956958] [2021-06-05 05:38:13,638 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 05:38:13,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:38:13,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 05:38:13,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-06-05 05:38:13,639 INFO L87 Difference]: Start difference. First operand 8175 states and 29347 transitions. Second operand has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:38:13,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:38:13,819 INFO L93 Difference]: Finished difference Result 10463 states and 37022 transitions. [2021-06-05 05:38:13,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 05:38:13,820 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:38:13,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:38:13,838 INFO L225 Difference]: With dead ends: 10463 [2021-06-05 05:38:13,839 INFO L226 Difference]: Without dead ends: 10463 [2021-06-05 05:38:13,839 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 85.4ms TimeCoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-06-05 05:38:13,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10463 states. [2021-06-05 05:38:13,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10463 to 8533. [2021-06-05 05:38:13,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8533 states, 8532 states have (on average 3.587318330989217) internal successors, (30607), 8532 states have internal predecessors, (30607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:38:13,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8533 states to 8533 states and 30607 transitions. [2021-06-05 05:38:13,992 INFO L78 Accepts]: Start accepts. Automaton has 8533 states and 30607 transitions. Word has length 23 [2021-06-05 05:38:13,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:38:13,992 INFO L482 AbstractCegarLoop]: Abstraction has 8533 states and 30607 transitions. [2021-06-05 05:38:13,992 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:38:13,992 INFO L276 IsEmpty]: Start isEmpty. Operand 8533 states and 30607 transitions. [2021-06-05 05:38:14,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:38:14,003 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:38:14,003 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:38:14,203 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:38:14,203 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:38:14,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:38:14,204 INFO L82 PathProgramCache]: Analyzing trace with hash -108973523, now seen corresponding path program 16 times [2021-06-05 05:38:14,204 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:38:14,204 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123931894] [2021-06-05 05:38:14,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:38:14,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:38:14,260 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:38:14,260 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:38:14,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123931894] [2021-06-05 05:38:14,260 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123931894] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:38:14,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [133949476] [2021-06-05 05:38:14,260 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 [2021-06-05 05:38:14,299 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:38:14,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:38:14,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 05:38:14,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:38:14,383 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:38:14,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [133949476] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:38:14,384 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:38:14,384 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 05:38:14,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380599047] [2021-06-05 05:38:14,384 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 05:38:14,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:38:14,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 05:38:14,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2021-06-05 05:38:14,385 INFO L87 Difference]: Start difference. First operand 8533 states and 30607 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:38:14,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:38:14,683 INFO L93 Difference]: Finished difference Result 18599 states and 66456 transitions. [2021-06-05 05:38:14,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 05:38:14,684 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:38:14,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:38:14,731 INFO L225 Difference]: With dead ends: 18599 [2021-06-05 05:38:14,731 INFO L226 Difference]: Without dead ends: 18599 [2021-06-05 05:38:14,732 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 141.6ms TimeCoverageRelationStatistics Valid=100, Invalid=172, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:38:14,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18599 states. [2021-06-05 05:38:15,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18599 to 14058. [2021-06-05 05:38:15,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14058 states, 14057 states have (on average 3.598634132460696) internal successors, (50586), 14057 states have internal predecessors, (50586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:38:15,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14058 states to 14058 states and 50586 transitions. [2021-06-05 05:38:15,113 INFO L78 Accepts]: Start accepts. Automaton has 14058 states and 50586 transitions. Word has length 23 [2021-06-05 05:38:15,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:38:15,113 INFO L482 AbstractCegarLoop]: Abstraction has 14058 states and 50586 transitions. [2021-06-05 05:38:15,113 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:38:15,113 INFO L276 IsEmpty]: Start isEmpty. Operand 14058 states and 50586 transitions. [2021-06-05 05:38:15,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:38:15,131 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:38:15,131 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:38:15,331 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2021-06-05 05:38:15,331 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:38:15,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:38:15,332 INFO L82 PathProgramCache]: Analyzing trace with hash -1805708085, now seen corresponding path program 17 times [2021-06-05 05:38:15,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:38:15,332 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295436474] [2021-06-05 05:38:15,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:38:15,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:38:15,393 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:38:15,394 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:38:15,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295436474] [2021-06-05 05:38:15,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295436474] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:38:15,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992973099] [2021-06-05 05:38:15,394 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 [2021-06-05 05:38:15,418 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 05:38:15,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:38:15,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 05:38:15,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:38:15,477 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:38:15,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [992973099] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:38:15,478 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:38:15,478 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-06-05 05:38:15,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953302512] [2021-06-05 05:38:15,478 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 05:38:15,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:38:15,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 05:38:15,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-06-05 05:38:15,479 INFO L87 Difference]: Start difference. First operand 14058 states and 50586 transitions. Second operand has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:38:15,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:38:15,747 INFO L93 Difference]: Finished difference Result 14997 states and 53374 transitions. [2021-06-05 05:38:15,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 05:38:15,748 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:38:15,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:38:15,786 INFO L225 Difference]: With dead ends: 14997 [2021-06-05 05:38:15,786 INFO L226 Difference]: Without dead ends: 14997 [2021-06-05 05:38:15,787 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 100.1ms TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2021-06-05 05:38:15,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14997 states. [2021-06-05 05:38:16,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14997 to 14058. [2021-06-05 05:38:16,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14058 states, 14057 states have (on average 3.598634132460696) internal successors, (50586), 14057 states have internal predecessors, (50586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:38:16,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14058 states to 14058 states and 50586 transitions. [2021-06-05 05:38:16,062 INFO L78 Accepts]: Start accepts. Automaton has 14058 states and 50586 transitions. Word has length 23 [2021-06-05 05:38:16,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:38:16,062 INFO L482 AbstractCegarLoop]: Abstraction has 14058 states and 50586 transitions. [2021-06-05 05:38:16,062 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:38:16,062 INFO L276 IsEmpty]: Start isEmpty. Operand 14058 states and 50586 transitions. [2021-06-05 05:38:16,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:38:16,078 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:38:16,078 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:38:16,278 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:38:16,278 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:38:16,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:38:16,279 INFO L82 PathProgramCache]: Analyzing trace with hash -1550642503, now seen corresponding path program 18 times [2021-06-05 05:38:16,279 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:38:16,279 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790140986] [2021-06-05 05:38:16,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:38:16,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:38:16,333 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:38:16,333 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:38:16,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790140986] [2021-06-05 05:38:16,333 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1790140986] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:38:16,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [322208550] [2021-06-05 05:38:16,333 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 [2021-06-05 05:38:16,363 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:38:16,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:38:16,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 05:38:16,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:38:16,471 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:38:16,472 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [322208550] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:38:16,472 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:38:16,472 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 05:38:16,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311159933] [2021-06-05 05:38:16,472 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 05:38:16,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:38:16,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 05:38:16,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-06-05 05:38:16,473 INFO L87 Difference]: Start difference. First operand 14058 states and 50586 transitions. Second operand has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:38:16,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:38:16,849 INFO L93 Difference]: Finished difference Result 25256 states and 90164 transitions. [2021-06-05 05:38:16,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 05:38:16,850 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:38:16,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:38:16,925 INFO L225 Difference]: With dead ends: 25256 [2021-06-05 05:38:16,925 INFO L226 Difference]: Without dead ends: 25256 [2021-06-05 05:38:16,925 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 181.7ms TimeCoverageRelationStatistics Valid=126, Invalid=216, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:38:16,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25256 states. [2021-06-05 05:38:17,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25256 to 14108. [2021-06-05 05:38:17,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14108 states, 14107 states have (on average 3.5999149358474516) internal successors, (50784), 14107 states have internal predecessors, (50784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:38:17,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14108 states to 14108 states and 50784 transitions. [2021-06-05 05:38:17,327 INFO L78 Accepts]: Start accepts. Automaton has 14108 states and 50784 transitions. Word has length 23 [2021-06-05 05:38:17,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:38:17,327 INFO L482 AbstractCegarLoop]: Abstraction has 14108 states and 50784 transitions. [2021-06-05 05:38:17,327 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:38:17,327 INFO L276 IsEmpty]: Start isEmpty. Operand 14108 states and 50784 transitions. [2021-06-05 05:38:17,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:38:17,343 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:38:17,343 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:38:17,543 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-06-05 05:38:17,544 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:38:17,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:38:17,544 INFO L82 PathProgramCache]: Analyzing trace with hash -530911043, now seen corresponding path program 19 times [2021-06-05 05:38:17,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:38:17,544 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887441396] [2021-06-05 05:38:17,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:38:17,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:38:17,589 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:38:17,589 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:38:17,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887441396] [2021-06-05 05:38:17,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887441396] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:38:17,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [974691632] [2021-06-05 05:38:17,594 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 [2021-06-05 05:38:17,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:38:17,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 05:38:17,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:38:17,697 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:38:17,697 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [974691632] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:38:17,697 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:38:17,697 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 05:38:17,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124418733] [2021-06-05 05:38:17,698 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 05:38:17,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:38:17,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 05:38:17,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-06-05 05:38:17,698 INFO L87 Difference]: Start difference. First operand 14108 states and 50784 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:38:17,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:38:17,968 INFO L93 Difference]: Finished difference Result 21867 states and 76984 transitions. [2021-06-05 05:38:17,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 05:38:17,968 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:38:17,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:38:18,012 INFO L225 Difference]: With dead ends: 21867 [2021-06-05 05:38:18,012 INFO L226 Difference]: Without dead ends: 21867 [2021-06-05 05:38:18,012 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 150.8ms TimeCoverageRelationStatistics Valid=129, Invalid=213, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:38:18,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21867 states. [2021-06-05 05:38:18,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21867 to 14162. [2021-06-05 05:38:18,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14162 states, 14161 states have (on average 3.599957630110868) internal successors, (50979), 14161 states have internal predecessors, (50979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:38:18,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14162 states to 14162 states and 50979 transitions. [2021-06-05 05:38:18,351 INFO L78 Accepts]: Start accepts. Automaton has 14162 states and 50979 transitions. Word has length 23 [2021-06-05 05:38:18,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:38:18,351 INFO L482 AbstractCegarLoop]: Abstraction has 14162 states and 50979 transitions. [2021-06-05 05:38:18,351 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:38:18,351 INFO L276 IsEmpty]: Start isEmpty. Operand 14162 states and 50979 transitions. [2021-06-05 05:38:18,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:38:18,369 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:38:18,369 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:38:18,569 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-06-05 05:38:18,570 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:38:18,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:38:18,570 INFO L82 PathProgramCache]: Analyzing trace with hash 851877945, now seen corresponding path program 20 times [2021-06-05 05:38:18,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:38:18,570 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841505058] [2021-06-05 05:38:18,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:38:18,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:38:18,627 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:38:18,627 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:38:18,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841505058] [2021-06-05 05:38:18,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841505058] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:38:18,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [774909752] [2021-06-05 05:38:18,627 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 [2021-06-05 05:38:18,650 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:38:18,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:38:18,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 05:38:18,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:38:18,773 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:38:18,773 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [774909752] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:38:18,773 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:38:18,773 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 05:38:18,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706717287] [2021-06-05 05:38:18,774 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 05:38:18,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:38:18,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 05:38:18,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2021-06-05 05:38:18,774 INFO L87 Difference]: Start difference. First operand 14162 states and 50979 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:38:19,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:38:19,163 INFO L93 Difference]: Finished difference Result 27150 states and 96606 transitions. [2021-06-05 05:38:19,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 05:38:19,164 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:38:19,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:38:19,234 INFO L225 Difference]: With dead ends: 27150 [2021-06-05 05:38:19,234 INFO L226 Difference]: Without dead ends: 27144 [2021-06-05 05:38:19,234 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 233.8ms TimeCoverageRelationStatistics Valid=186, Invalid=320, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:38:19,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27144 states. [2021-06-05 05:38:19,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27144 to 14874. [2021-06-05 05:38:19,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14874 states, 14873 states have (on average 3.604921670140523) internal successors, (53616), 14873 states have internal predecessors, (53616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:38:19,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14874 states to 14874 states and 53616 transitions. [2021-06-05 05:38:19,637 INFO L78 Accepts]: Start accepts. Automaton has 14874 states and 53616 transitions. Word has length 23 [2021-06-05 05:38:19,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:38:19,637 INFO L482 AbstractCegarLoop]: Abstraction has 14874 states and 53616 transitions. [2021-06-05 05:38:19,637 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:38:19,637 INFO L276 IsEmpty]: Start isEmpty. Operand 14874 states and 53616 transitions. [2021-06-05 05:38:19,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:38:19,656 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:38:19,656 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:38:19,857 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:38:19,857 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:38:19,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:38:19,857 INFO L82 PathProgramCache]: Analyzing trace with hash 1871609405, now seen corresponding path program 21 times [2021-06-05 05:38:19,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:38:19,858 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510765659] [2021-06-05 05:38:19,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:38:19,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:38:19,909 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:38:19,910 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:38:19,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510765659] [2021-06-05 05:38:19,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510765659] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:38:19,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534679749] [2021-06-05 05:38:19,910 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 [2021-06-05 05:38:19,959 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 05:38:19,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:38:19,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 05:38:19,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:38:20,062 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:38:20,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1534679749] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:38:20,062 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:38:20,062 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 05:38:20,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488591110] [2021-06-05 05:38:20,063 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 05:38:20,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:38:20,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 05:38:20,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-06-05 05:38:20,063 INFO L87 Difference]: Start difference. First operand 14874 states and 53616 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:38:20,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:38:20,499 INFO L93 Difference]: Finished difference Result 22680 states and 79637 transitions. [2021-06-05 05:38:20,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 05:38:20,499 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 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 [2021-06-05 05:38:20,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:38:20,550 INFO L225 Difference]: With dead ends: 22680 [2021-06-05 05:38:20,551 INFO L226 Difference]: Without dead ends: 22680 [2021-06-05 05:38:20,551 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 272.5ms TimeCoverageRelationStatistics Valid=200, Invalid=352, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:38:20,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22680 states. [2021-06-05 05:38:20,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22680 to 14862. [2021-06-05 05:38:20,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14862 states, 14861 states have (on average 3.6048045219029676) internal successors, (53571), 14861 states have internal predecessors, (53571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:38:20,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14862 states to 14862 states and 53571 transitions. [2021-06-05 05:38:20,908 INFO L78 Accepts]: Start accepts. Automaton has 14862 states and 53571 transitions. Word has length 23 [2021-06-05 05:38:20,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:38:20,908 INFO L482 AbstractCegarLoop]: Abstraction has 14862 states and 53571 transitions. [2021-06-05 05:38:20,908 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:38:20,908 INFO L276 IsEmpty]: Start isEmpty. Operand 14862 states and 53571 transitions. [2021-06-05 05:38:20,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:38:20,926 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:38:20,926 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:38:21,127 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2021-06-05 05:38:21,127 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:38:21,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:38:21,128 INFO L82 PathProgramCache]: Analyzing trace with hash -1111272131, now seen corresponding path program 22 times [2021-06-05 05:38:21,128 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:38:21,128 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614797639] [2021-06-05 05:38:21,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:38:21,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:38:21,176 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:38:21,177 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:38:21,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614797639] [2021-06-05 05:38:21,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614797639] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:38:21,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [785449088] [2021-06-05 05:38:21,177 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 [2021-06-05 05:38:21,208 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:38:21,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:38:21,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 05:38:21,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:38:21,292 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:38:21,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [785449088] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:38:21,292 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:38:21,292 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 05:38:21,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190152370] [2021-06-05 05:38:21,293 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 05:38:21,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:38:21,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 05:38:21,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-06-05 05:38:21,293 INFO L87 Difference]: Start difference. First operand 14862 states and 53571 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:38:21,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:38:21,569 INFO L93 Difference]: Finished difference Result 19297 states and 68666 transitions. [2021-06-05 05:38:21,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 05:38:21,570 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:38:21,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:38:21,605 INFO L225 Difference]: With dead ends: 19297 [2021-06-05 05:38:21,606 INFO L226 Difference]: Without dead ends: 19297 [2021-06-05 05:38:21,606 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 154.4ms TimeCoverageRelationStatistics Valid=118, Invalid=224, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:38:21,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19297 states. [2021-06-05 05:38:21,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19297 to 14862. [2021-06-05 05:38:21,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14862 states, 14861 states have (on average 3.6048045219029676) internal successors, (53571), 14861 states have internal predecessors, (53571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:38:21,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14862 states to 14862 states and 53571 transitions. [2021-06-05 05:38:21,863 INFO L78 Accepts]: Start accepts. Automaton has 14862 states and 53571 transitions. Word has length 23 [2021-06-05 05:38:21,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:38:21,863 INFO L482 AbstractCegarLoop]: Abstraction has 14862 states and 53571 transitions. [2021-06-05 05:38:21,863 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:38:21,863 INFO L276 IsEmpty]: Start isEmpty. Operand 14862 states and 53571 transitions. [2021-06-05 05:38:21,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:38:21,881 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:38:21,881 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:38:22,082 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2021-06-05 05:38:22,082 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:38:22,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:38:22,082 INFO L82 PathProgramCache]: Analyzing trace with hash 1359329409, now seen corresponding path program 23 times [2021-06-05 05:38:22,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:38:22,082 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144942294] [2021-06-05 05:38:22,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:38:22,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:38:22,133 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:38:22,133 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:38:22,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144942294] [2021-06-05 05:38:22,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144942294] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:38:22,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1701209536] [2021-06-05 05:38:22,134 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 [2021-06-05 05:38:22,175 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:38:22,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:38:22,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 05:38:22,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:38:22,254 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:38:22,254 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1701209536] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:38:22,254 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:38:22,254 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 05:38:22,254 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846440990] [2021-06-05 05:38:22,254 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 05:38:22,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:38:22,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 05:38:22,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2021-06-05 05:38:22,255 INFO L87 Difference]: Start difference. First operand 14862 states and 53571 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:38:22,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:38:22,613 INFO L93 Difference]: Finished difference Result 33945 states and 122633 transitions. [2021-06-05 05:38:22,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 05:38:22,614 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:38:22,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:38:22,685 INFO L225 Difference]: With dead ends: 33945 [2021-06-05 05:38:22,685 INFO L226 Difference]: Without dead ends: 33935 [2021-06-05 05:38:22,686 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 125.2ms TimeCoverageRelationStatistics Valid=93, Invalid=147, Unknown=0, NotChecked=0, Total=240 [2021-06-05 05:38:22,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33935 states. [2021-06-05 05:38:23,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33935 to 26076. [2021-06-05 05:38:23,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26076 states, 26075 states have (on average 3.595091083413231) internal successors, (93742), 26075 states have internal predecessors, (93742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:38:23,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26076 states to 26076 states and 93742 transitions. [2021-06-05 05:38:23,181 INFO L78 Accepts]: Start accepts. Automaton has 26076 states and 93742 transitions. Word has length 23 [2021-06-05 05:38:23,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:38:23,182 INFO L482 AbstractCegarLoop]: Abstraction has 26076 states and 93742 transitions. [2021-06-05 05:38:23,182 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:38:23,182 INFO L276 IsEmpty]: Start isEmpty. Operand 26076 states and 93742 transitions. [2021-06-05 05:38:23,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:38:23,206 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:38:23,206 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:38:23,406 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-06-05 05:38:23,407 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:38:23,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:38:23,407 INFO L82 PathProgramCache]: Analyzing trace with hash -337405153, now seen corresponding path program 24 times [2021-06-05 05:38:23,407 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:38:23,408 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109433401] [2021-06-05 05:38:23,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:38:23,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:38:23,457 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:38:23,457 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:38:23,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109433401] [2021-06-05 05:38:23,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109433401] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:38:23,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1093835344] [2021-06-05 05:38:23,457 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 [2021-06-05 05:38:23,485 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:38:23,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:38:23,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 05:38:23,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:38:23,551 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:38:23,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1093835344] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:38:23,551 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:38:23,551 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 05:38:23,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945588452] [2021-06-05 05:38:23,552 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 05:38:23,552 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:38:23,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 05:38:23,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-06-05 05:38:23,552 INFO L87 Difference]: Start difference. First operand 26076 states and 93742 transitions. Second operand has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:38:23,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:38:23,807 INFO L93 Difference]: Finished difference Result 26734 states and 95761 transitions. [2021-06-05 05:38:23,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 05:38:23,808 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:38:23,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:38:23,856 INFO L225 Difference]: With dead ends: 26734 [2021-06-05 05:38:23,856 INFO L226 Difference]: Without dead ends: 26734 [2021-06-05 05:38:23,856 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 115.0ms TimeCoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:38:23,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26734 states. [2021-06-05 05:38:24,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26734 to 26088. [2021-06-05 05:38:24,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26088 states, 26087 states have (on average 3.5951240081266533) internal successors, (93786), 26087 states have internal predecessors, (93786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:38:24,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26088 states to 26088 states and 93786 transitions. [2021-06-05 05:38:24,288 INFO L78 Accepts]: Start accepts. Automaton has 26088 states and 93786 transitions. Word has length 23 [2021-06-05 05:38:24,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:38:24,288 INFO L482 AbstractCegarLoop]: Abstraction has 26088 states and 93786 transitions. [2021-06-05 05:38:24,288 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:38:24,288 INFO L276 IsEmpty]: Start isEmpty. Operand 26088 states and 93786 transitions. [2021-06-05 05:38:24,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:38:24,313 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:38:24,313 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:38:24,513 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:38:24,513 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:38:24,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:38:24,514 INFO L82 PathProgramCache]: Analyzing trace with hash 1911852527, now seen corresponding path program 15 times [2021-06-05 05:38:24,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:38:24,514 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170253543] [2021-06-05 05:38:24,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:38:24,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:38:24,552 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:38:24,552 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:38:24,552 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170253543] [2021-06-05 05:38:24,552 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170253543] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:38:24,552 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492547749] [2021-06-05 05:38:24,552 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:38:24,586 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:38:24,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:38:24,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 05:38:24,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:38:24,660 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:38:24,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [492547749] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:38:24,660 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:38:24,660 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-06-05 05:38:24,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199091598] [2021-06-05 05:38:24,660 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 05:38:24,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:38:24,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 05:38:24,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-06-05 05:38:24,661 INFO L87 Difference]: Start difference. First operand 26088 states and 93786 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:38:24,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:38:24,919 INFO L93 Difference]: Finished difference Result 27275 states and 97322 transitions. [2021-06-05 05:38:24,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 05:38:24,919 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:38:24,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:38:24,973 INFO L225 Difference]: With dead ends: 27275 [2021-06-05 05:38:24,973 INFO L226 Difference]: Without dead ends: 27223 [2021-06-05 05:38:24,974 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 111.1ms TimeCoverageRelationStatistics Valid=90, Invalid=150, Unknown=0, NotChecked=0, Total=240 [2021-06-05 05:38:24,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27223 states. [2021-06-05 05:38:25,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27223 to 26365. [2021-06-05 05:38:25,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26365 states, 26364 states have (on average 3.5933469883174025) internal successors, (94735), 26364 states have internal predecessors, (94735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:38:25,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26365 states to 26365 states and 94735 transitions. [2021-06-05 05:38:25,420 INFO L78 Accepts]: Start accepts. Automaton has 26365 states and 94735 transitions. Word has length 23 [2021-06-05 05:38:25,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:38:25,421 INFO L482 AbstractCegarLoop]: Abstraction has 26365 states and 94735 transitions. [2021-06-05 05:38:25,421 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:38:25,421 INFO L276 IsEmpty]: Start isEmpty. Operand 26365 states and 94735 transitions. [2021-06-05 05:38:25,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:38:25,446 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:38:25,446 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:38:25,646 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:38:25,646 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:38:25,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:38:25,647 INFO L82 PathProgramCache]: Analyzing trace with hash 1784976879, now seen corresponding path program 16 times [2021-06-05 05:38:25,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:38:25,647 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801365885] [2021-06-05 05:38:25,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:38:25,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:38:25,672 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:38:25,672 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:38:25,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801365885] [2021-06-05 05:38:25,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801365885] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:38:25,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1596560111] [2021-06-05 05:38:25,673 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 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 05:38:25,700 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:38:25,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:38:25,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 05:38:25,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:38:25,766 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:38:25,766 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1596560111] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:38:25,766 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:38:25,766 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-06-05 05:38:25,766 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667082248] [2021-06-05 05:38:25,766 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 05:38:25,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:38:25,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 05:38:25,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-06-05 05:38:25,767 INFO L87 Difference]: Start difference. First operand 26365 states and 94735 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:38:26,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:38:26,070 INFO L93 Difference]: Finished difference Result 26807 states and 95786 transitions. [2021-06-05 05:38:26,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 05:38:26,071 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:38:26,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:38:26,146 INFO L225 Difference]: With dead ends: 26807 [2021-06-05 05:38:26,146 INFO L226 Difference]: Without dead ends: 26797 [2021-06-05 05:38:26,147 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 103.8ms TimeCoverageRelationStatistics Valid=92, Invalid=180, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:38:26,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26797 states. [2021-06-05 05:38:26,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26797 to 26277. [2021-06-05 05:38:26,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26277 states, 26276 states have (on average 3.593811843507383) internal successors, (94431), 26276 states have internal predecessors, (94431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:38:26,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26277 states to 26277 states and 94431 transitions. [2021-06-05 05:38:26,691 INFO L78 Accepts]: Start accepts. Automaton has 26277 states and 94431 transitions. Word has length 23 [2021-06-05 05:38:26,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:38:26,691 INFO L482 AbstractCegarLoop]: Abstraction has 26277 states and 94431 transitions. [2021-06-05 05:38:26,691 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:38:26,691 INFO L276 IsEmpty]: Start isEmpty. Operand 26277 states and 94431 transitions. [2021-06-05 05:38:26,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:38:26,724 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:38:26,724 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:38:26,945 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:38:26,945 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:38:26,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:38:26,945 INFO L82 PathProgramCache]: Analyzing trace with hash -51297549, now seen corresponding path program 17 times [2021-06-05 05:38:26,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:38:26,946 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388433705] [2021-06-05 05:38:26,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:38:26,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:38:26,969 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:38:26,970 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:38:26,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388433705] [2021-06-05 05:38:26,970 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388433705] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:38:26,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [467952663] [2021-06-05 05:38:26,970 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:38:26,999 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:38:26,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:38:27,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 05:38:27,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:38:27,062 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:38:27,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [467952663] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:38:27,062 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:38:27,062 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-06-05 05:38:27,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084701330] [2021-06-05 05:38:27,063 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 05:38:27,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:38:27,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 05:38:27,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-06-05 05:38:27,063 INFO L87 Difference]: Start difference. First operand 26277 states and 94431 transitions. Second operand has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:38:27,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:38:27,445 INFO L93 Difference]: Finished difference Result 26602 states and 95215 transitions. [2021-06-05 05:38:27,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 05:38:27,446 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:38:27,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:38:27,495 INFO L225 Difference]: With dead ends: 26602 [2021-06-05 05:38:27,495 INFO L226 Difference]: Without dead ends: 26542 [2021-06-05 05:38:27,495 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 141.8ms TimeCoverageRelationStatistics Valid=117, Invalid=263, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:38:27,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26542 states. [2021-06-05 05:38:27,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26542 to 26119. [2021-06-05 05:38:28,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26119 states, 26118 states have (on average 3.5962937437782374) internal successors, (93928), 26118 states have internal predecessors, (93928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:38:28,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26119 states to 26119 states and 93928 transitions. [2021-06-05 05:38:28,071 INFO L78 Accepts]: Start accepts. Automaton has 26119 states and 93928 transitions. Word has length 23 [2021-06-05 05:38:28,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:38:28,071 INFO L482 AbstractCegarLoop]: Abstraction has 26119 states and 93928 transitions. [2021-06-05 05:38:28,071 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:38:28,071 INFO L276 IsEmpty]: Start isEmpty. Operand 26119 states and 93928 transitions. [2021-06-05 05:38:28,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:38:28,096 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:38:28,096 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:38:28,296 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:38:28,296 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:38:28,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:38:28,297 INFO L82 PathProgramCache]: Analyzing trace with hash 837128115, now seen corresponding path program 18 times [2021-06-05 05:38:28,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:38:28,297 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410494944] [2021-06-05 05:38:28,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:38:28,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:38:28,320 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:38:28,321 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:38:28,321 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410494944] [2021-06-05 05:38:28,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410494944] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:38:28,321 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1187660971] [2021-06-05 05:38:28,321 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 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:38:28,363 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:38:28,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:38:28,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 05:38:28,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:38:28,438 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:38:28,438 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1187660971] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:38:28,438 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:38:28,438 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-06-05 05:38:28,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718680067] [2021-06-05 05:38:28,438 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 05:38:28,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:38:28,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 05:38:28,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-06-05 05:38:28,439 INFO L87 Difference]: Start difference. First operand 26119 states and 93928 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:38:28,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:38:28,688 INFO L93 Difference]: Finished difference Result 26987 states and 96631 transitions. [2021-06-05 05:38:28,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 05:38:28,688 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:38:28,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:38:28,742 INFO L225 Difference]: With dead ends: 26987 [2021-06-05 05:38:28,742 INFO L226 Difference]: Without dead ends: 26963 [2021-06-05 05:38:28,742 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 103.4ms TimeCoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:38:28,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26963 states. [2021-06-05 05:38:29,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26963 to 26267. [2021-06-05 05:38:29,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26267 states, 26266 states have (on average 3.5969694662301075) internal successors, (94478), 26266 states have internal predecessors, (94478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:38:29,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26267 states to 26267 states and 94478 transitions. [2021-06-05 05:38:29,182 INFO L78 Accepts]: Start accepts. Automaton has 26267 states and 94478 transitions. Word has length 23 [2021-06-05 05:38:29,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:38:29,182 INFO L482 AbstractCegarLoop]: Abstraction has 26267 states and 94478 transitions. [2021-06-05 05:38:29,182 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:38:29,182 INFO L276 IsEmpty]: Start isEmpty. Operand 26267 states and 94478 transitions. [2021-06-05 05:38:29,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:38:29,208 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:38:29,208 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:38:29,408 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable85 [2021-06-05 05:38:29,408 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:38:29,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:38:29,409 INFO L82 PathProgramCache]: Analyzing trace with hash 710252467, now seen corresponding path program 19 times [2021-06-05 05:38:29,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:38:29,409 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606445539] [2021-06-05 05:38:29,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:38:29,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:38:29,434 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:38:29,435 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:38:29,435 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606445539] [2021-06-05 05:38:29,435 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606445539] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:38:29,435 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [412608958] [2021-06-05 05:38:29,435 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 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:38:29,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:38:29,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 05:38:29,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:38:29,533 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:38:29,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [412608958] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:38:29,533 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:38:29,533 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-06-05 05:38:29,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79761254] [2021-06-05 05:38:29,533 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 05:38:29,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:38:29,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 05:38:29,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-06-05 05:38:29,535 INFO L87 Difference]: Start difference. First operand 26267 states and 94478 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:38:29,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:38:29,842 INFO L93 Difference]: Finished difference Result 26543 states and 95133 transitions. [2021-06-05 05:38:29,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 05:38:29,842 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:38:29,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:38:29,898 INFO L225 Difference]: With dead ends: 26543 [2021-06-05 05:38:29,898 INFO L226 Difference]: Without dead ends: 26533 [2021-06-05 05:38:29,898 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 115.5ms TimeCoverageRelationStatistics Valid=102, Invalid=240, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:38:29,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26533 states. [2021-06-05 05:38:30,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26533 to 26261. [2021-06-05 05:38:30,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26261 states, 26260 states have (on average 3.596839299314547) internal successors, (94453), 26260 states have internal predecessors, (94453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:38:30,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26261 states to 26261 states and 94453 transitions. [2021-06-05 05:38:30,321 INFO L78 Accepts]: Start accepts. Automaton has 26261 states and 94453 transitions. Word has length 23 [2021-06-05 05:38:30,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:38:30,322 INFO L482 AbstractCegarLoop]: Abstraction has 26261 states and 94453 transitions. [2021-06-05 05:38:30,322 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:38:30,322 INFO L276 IsEmpty]: Start isEmpty. Operand 26261 states and 94453 transitions. [2021-06-05 05:38:30,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:38:30,347 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:38:30,347 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:38:30,548 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:38:30,549 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:38:30,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:38:30,549 INFO L82 PathProgramCache]: Analyzing trace with hash 1071393779, now seen corresponding path program 20 times [2021-06-05 05:38:30,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:38:30,549 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611126341] [2021-06-05 05:38:30,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:38:30,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:38:30,575 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:38:30,575 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:38:30,575 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611126341] [2021-06-05 05:38:30,575 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611126341] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:38:30,575 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667229747] [2021-06-05 05:38:30,575 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:38:30,616 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:38:30,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:38:30,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 05:38:30,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:38:30,683 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:38:30,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1667229747] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:38:30,683 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:38:30,683 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-06-05 05:38:30,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898554106] [2021-06-05 05:38:30,683 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 05:38:30,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:38:30,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 05:38:30,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-06-05 05:38:30,684 INFO L87 Difference]: Start difference. First operand 26261 states and 94453 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:38:30,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:38:30,961 INFO L93 Difference]: Finished difference Result 26792 states and 96145 transitions. [2021-06-05 05:38:30,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 05:38:30,961 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:38:30,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:38:31,035 INFO L225 Difference]: With dead ends: 26792 [2021-06-05 05:38:31,036 INFO L226 Difference]: Without dead ends: 26792 [2021-06-05 05:38:31,036 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 85.8ms TimeCoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2021-06-05 05:38:31,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26792 states. [2021-06-05 05:38:31,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26792 to 26250. [2021-06-05 05:38:31,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26250 states, 26249 states have (on average 3.595908415558688) internal successors, (94389), 26249 states have internal predecessors, (94389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:38:31,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26250 states to 26250 states and 94389 transitions. [2021-06-05 05:38:31,539 INFO L78 Accepts]: Start accepts. Automaton has 26250 states and 94389 transitions. Word has length 23 [2021-06-05 05:38:31,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:38:31,540 INFO L482 AbstractCegarLoop]: Abstraction has 26250 states and 94389 transitions. [2021-06-05 05:38:31,540 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:38:31,540 INFO L276 IsEmpty]: Start isEmpty. Operand 26250 states and 94389 transitions. [2021-06-05 05:38:31,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:38:31,564 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:38:31,564 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:38:31,765 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2021-06-05 05:38:31,765 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:38:31,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:38:31,765 INFO L82 PathProgramCache]: Analyzing trace with hash 1604402439, now seen corresponding path program 25 times [2021-06-05 05:38:31,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:38:31,765 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548055153] [2021-06-05 05:38:31,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:38:31,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:38:31,831 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:38:31,831 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:38:31,831 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548055153] [2021-06-05 05:38:31,831 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548055153] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:38:31,831 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496908961] [2021-06-05 05:38:31,831 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:38:31,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:38:31,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 05:38:31,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:38:31,942 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:38:31,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [496908961] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:38:31,942 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:38:31,942 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-06-05 05:38:31,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773885834] [2021-06-05 05:38:31,942 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 05:38:31,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:38:31,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 05:38:31,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-06-05 05:38:31,943 INFO L87 Difference]: Start difference. First operand 26250 states and 94389 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:38:32,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:38:32,204 INFO L93 Difference]: Finished difference Result 26475 states and 94952 transitions. [2021-06-05 05:38:32,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 05:38:32,205 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:38:32,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:38:32,280 INFO L225 Difference]: With dead ends: 26475 [2021-06-05 05:38:32,281 INFO L226 Difference]: Without dead ends: 26404 [2021-06-05 05:38:32,281 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 111.1ms TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-06-05 05:38:32,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26404 states. [2021-06-05 05:38:32,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26404 to 26284. [2021-06-05 05:38:32,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26284 states, 26283 states have (on average 3.595099493969486) internal successors, (94490), 26283 states have internal predecessors, (94490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:38:32,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26284 states to 26284 states and 94490 transitions. [2021-06-05 05:38:32,748 INFO L78 Accepts]: Start accepts. Automaton has 26284 states and 94490 transitions. Word has length 23 [2021-06-05 05:38:32,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:38:32,748 INFO L482 AbstractCegarLoop]: Abstraction has 26284 states and 94490 transitions. [2021-06-05 05:38:32,748 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:38:32,748 INFO L276 IsEmpty]: Start isEmpty. Operand 26284 states and 94490 transitions. [2021-06-05 05:38:32,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:38:32,773 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:38:32,773 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:38:32,973 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:38:32,973 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:38:32,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:38:32,974 INFO L82 PathProgramCache]: Analyzing trace with hash 805362435, now seen corresponding path program 26 times [2021-06-05 05:38:32,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:38:32,974 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998283341] [2021-06-05 05:38:32,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:38:32,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:38:33,055 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:38:33,055 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:38:33,056 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998283341] [2021-06-05 05:38:33,056 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998283341] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:38:33,056 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1553235476] [2021-06-05 05:38:33,056 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:38:33,089 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:38:33,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:38:33,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 05:38:33,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:38:33,179 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:38:33,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1553235476] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:38:33,179 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:38:33,179 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 05:38:33,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782015603] [2021-06-05 05:38:33,179 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 05:38:33,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:38:33,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 05:38:33,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-06-05 05:38:33,180 INFO L87 Difference]: Start difference. First operand 26284 states and 94490 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:38:33,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:38:33,475 INFO L93 Difference]: Finished difference Result 33195 states and 119238 transitions. [2021-06-05 05:38:33,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 05:38:33,475 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:38:33,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:38:33,543 INFO L225 Difference]: With dead ends: 33195 [2021-06-05 05:38:33,544 INFO L226 Difference]: Without dead ends: 33149 [2021-06-05 05:38:33,544 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 135.8ms TimeCoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-06-05 05:38:33,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33149 states. [2021-06-05 05:38:34,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33149 to 26274. [2021-06-05 05:38:34,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26274 states, 26273 states have (on average 3.5954782476306475) internal successors, (94464), 26273 states have internal predecessors, (94464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:38:34,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26274 states to 26274 states and 94464 transitions. [2021-06-05 05:38:34,120 INFO L78 Accepts]: Start accepts. Automaton has 26274 states and 94464 transitions. Word has length 23 [2021-06-05 05:38:34,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:38:34,121 INFO L482 AbstractCegarLoop]: Abstraction has 26274 states and 94464 transitions. [2021-06-05 05:38:34,121 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:38:34,121 INFO L276 IsEmpty]: Start isEmpty. Operand 26274 states and 94464 transitions. [2021-06-05 05:38:34,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:38:34,145 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:38:34,145 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:38:34,345 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2021-06-05 05:38:34,346 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:38:34,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:38:34,346 INFO L82 PathProgramCache]: Analyzing trace with hash 723963379, now seen corresponding path program 27 times [2021-06-05 05:38:34,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:38:34,346 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681744135] [2021-06-05 05:38:34,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:38:34,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:38:34,420 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:38:34,421 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:38:34,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681744135] [2021-06-05 05:38:34,421 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681744135] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:38:34,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770425650] [2021-06-05 05:38:34,421 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:38:34,449 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 05:38:34,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:38:34,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 05:38:34,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:38:34,567 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:38:34,568 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [770425650] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:38:34,568 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:38:34,568 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 05:38:34,568 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961994207] [2021-06-05 05:38:34,569 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 05:38:34,569 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:38:34,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 05:38:34,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-05 05:38:34,569 INFO L87 Difference]: Start difference. First operand 26274 states and 94464 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:38:35,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:38:35,322 INFO L93 Difference]: Finished difference Result 33827 states and 120954 transitions. [2021-06-05 05:38:35,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 05:38:35,322 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 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 [2021-06-05 05:38:35,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:38:35,391 INFO L225 Difference]: With dead ends: 33827 [2021-06-05 05:38:35,391 INFO L226 Difference]: Without dead ends: 33589 [2021-06-05 05:38:35,392 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 466.6ms TimeCoverageRelationStatistics Valid=257, Invalid=613, Unknown=0, NotChecked=0, Total=870 [2021-06-05 05:38:35,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33589 states. [2021-06-05 05:38:35,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33589 to 26278. [2021-06-05 05:38:35,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26278 states, 26277 states have (on average 3.59557788179777) internal successors, (94481), 26277 states have internal predecessors, (94481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:38:35,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26278 states to 26278 states and 94481 transitions. [2021-06-05 05:38:35,902 INFO L78 Accepts]: Start accepts. Automaton has 26278 states and 94481 transitions. Word has length 23 [2021-06-05 05:38:35,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:38:35,902 INFO L482 AbstractCegarLoop]: Abstraction has 26278 states and 94481 transitions. [2021-06-05 05:38:35,902 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:38:35,902 INFO L276 IsEmpty]: Start isEmpty. Operand 26278 states and 94481 transitions. [2021-06-05 05:38:35,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:38:35,927 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:38:35,927 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:38:36,128 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:38:36,128 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:38:36,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:38:36,128 INFO L82 PathProgramCache]: Analyzing trace with hash -1201212733, now seen corresponding path program 28 times [2021-06-05 05:38:36,128 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:38:36,129 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676832344] [2021-06-05 05:38:36,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:38:36,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:38:36,249 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:38:36,249 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:38:36,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676832344] [2021-06-05 05:38:36,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676832344] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:38:36,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040944055] [2021-06-05 05:38:36,249 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 [2021-06-05 05:38:36,272 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:38:36,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:38:36,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 05:38:36,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:38:36,325 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:38:36,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1040944055] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:38:36,326 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:38:36,326 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-06-05 05:38:36,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043231349] [2021-06-05 05:38:36,326 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 05:38:36,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:38:36,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 05:38:36,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-06-05 05:38:36,326 INFO L87 Difference]: Start difference. First operand 26278 states and 94481 transitions. Second operand has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:38:36,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:38:36,548 INFO L93 Difference]: Finished difference Result 26465 states and 94972 transitions. [2021-06-05 05:38:36,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 05:38:36,549 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:38:36,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:38:36,601 INFO L225 Difference]: With dead ends: 26465 [2021-06-05 05:38:36,601 INFO L226 Difference]: Without dead ends: 26406 [2021-06-05 05:38:36,601 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 93.5ms TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-06-05 05:38:36,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26406 states. [2021-06-05 05:38:36,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26406 to 26302. [2021-06-05 05:38:36,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26302 states, 26301 states have (on average 3.595262537546101) internal successors, (94559), 26301 states have internal predecessors, (94559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:38:37,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26302 states to 26302 states and 94559 transitions. [2021-06-05 05:38:37,051 INFO L78 Accepts]: Start accepts. Automaton has 26302 states and 94559 transitions. Word has length 23 [2021-06-05 05:38:37,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:38:37,052 INFO L482 AbstractCegarLoop]: Abstraction has 26302 states and 94559 transitions. [2021-06-05 05:38:37,052 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:38:37,052 INFO L276 IsEmpty]: Start isEmpty. Operand 26302 states and 94559 transitions. [2021-06-05 05:38:37,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:38:37,076 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:38:37,076 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:38:37,277 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:38:37,277 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:38:37,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:38:37,277 INFO L82 PathProgramCache]: Analyzing trace with hash -2000252737, now seen corresponding path program 29 times [2021-06-05 05:38:37,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:38:37,277 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972822221] [2021-06-05 05:38:37,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:38:37,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:38:37,356 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:38:37,356 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:38:37,356 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972822221] [2021-06-05 05:38:37,356 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972822221] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:38:37,356 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135930667] [2021-06-05 05:38:37,356 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:38:37,386 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 05:38:37,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:38:37,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 05:38:37,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:38:37,483 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:38:37,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2135930667] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:38:37,484 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:38:37,484 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-06-05 05:38:37,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499605252] [2021-06-05 05:38:37,484 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 05:38:37,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:38:37,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 05:38:37,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-06-05 05:38:37,485 INFO L87 Difference]: Start difference. First operand 26302 states and 94559 transitions. Second operand has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:38:37,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:38:37,802 INFO L93 Difference]: Finished difference Result 33157 states and 119124 transitions. [2021-06-05 05:38:37,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 05:38:37,803 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:38:37,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:38:37,871 INFO L225 Difference]: With dead ends: 33157 [2021-06-05 05:38:37,872 INFO L226 Difference]: Without dead ends: 33111 [2021-06-05 05:38:37,872 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 185.9ms TimeCoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-06-05 05:38:37,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33111 states. [2021-06-05 05:38:38,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33111 to 26299. [2021-06-05 05:38:38,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26299 states, 26298 states have (on average 3.595520571906609) internal successors, (94555), 26298 states have internal predecessors, (94555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:38:38,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26299 states to 26299 states and 94555 transitions. [2021-06-05 05:38:38,340 INFO L78 Accepts]: Start accepts. Automaton has 26299 states and 94555 transitions. Word has length 23 [2021-06-05 05:38:38,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:38:38,340 INFO L482 AbstractCegarLoop]: Abstraction has 26299 states and 94555 transitions. [2021-06-05 05:38:38,340 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:38:38,340 INFO L276 IsEmpty]: Start isEmpty. Operand 26299 states and 94555 transitions. [2021-06-05 05:38:38,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:38:38,364 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:38:38,364 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:38:38,564 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable97 [2021-06-05 05:38:38,565 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:38:38,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:38:38,565 INFO L82 PathProgramCache]: Analyzing trace with hash 2034590693, now seen corresponding path program 30 times [2021-06-05 05:38:38,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:38:38,565 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58357109] [2021-06-05 05:38:38,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:38:38,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:38:38,664 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:38:38,665 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:38:38,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58357109] [2021-06-05 05:38:38,665 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58357109] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:38:38,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1926501413] [2021-06-05 05:38:38,665 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:38:38,686 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:38:38,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:38:38,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 05:38:38,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:38:38,741 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:38:38,741 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1926501413] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:38:38,741 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:38:38,741 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-06-05 05:38:38,741 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655769662] [2021-06-05 05:38:38,741 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 05:38:38,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:38:38,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 05:38:38,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-06-05 05:38:38,742 INFO L87 Difference]: Start difference. First operand 26299 states and 94555 transitions. Second operand has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:38:38,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:38:38,941 INFO L93 Difference]: Finished difference Result 26430 states and 94880 transitions. [2021-06-05 05:38:38,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 05:38:38,942 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:38:38,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:38:38,999 INFO L225 Difference]: With dead ends: 26430 [2021-06-05 05:38:38,999 INFO L226 Difference]: Without dead ends: 26387 [2021-06-05 05:38:38,999 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 100.2ms TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-06-05 05:38:39,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26387 states. [2021-06-05 05:38:39,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26387 to 26303. [2021-06-05 05:38:39,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26303 states, 26302 states have (on average 3.595201885788153) internal successors, (94561), 26302 states have internal predecessors, (94561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:38:39,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26303 states to 26303 states and 94561 transitions. [2021-06-05 05:38:39,517 INFO L78 Accepts]: Start accepts. Automaton has 26303 states and 94561 transitions. Word has length 23 [2021-06-05 05:38:39,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:38:39,517 INFO L482 AbstractCegarLoop]: Abstraction has 26303 states and 94561 transitions. [2021-06-05 05:38:39,517 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:38:39,517 INFO L276 IsEmpty]: Start isEmpty. Operand 26303 states and 94561 transitions. [2021-06-05 05:38:39,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:38:39,541 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:38:39,541 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:38:39,741 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-06-05 05:38:39,741 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:38:39,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:38:39,742 INFO L82 PathProgramCache]: Analyzing trace with hash 2056346547, now seen corresponding path program 31 times [2021-06-05 05:38:39,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:38:39,742 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670475015] [2021-06-05 05:38:39,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:38:39,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:38:39,796 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:38:39,796 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:38:39,796 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670475015] [2021-06-05 05:38:39,796 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670475015] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:38:39,796 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731890118] [2021-06-05 05:38:39,796 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:38:39,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:38:39,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 05:38:39,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:38:39,877 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:38:39,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [731890118] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:38:39,878 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:38:39,878 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 05:38:39,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690089098] [2021-06-05 05:38:39,878 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 05:38:39,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:38:39,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 05:38:39,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-06-05 05:38:39,878 INFO L87 Difference]: Start difference. First operand 26303 states and 94561 transitions. Second operand has 12 states, 12 states have (on average 2.5) 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) [2021-06-05 05:38:40,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:38:40,123 INFO L93 Difference]: Finished difference Result 27397 states and 97838 transitions. [2021-06-05 05:38:40,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 05:38:40,123 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5) 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 23 [2021-06-05 05:38:40,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:38:40,177 INFO L225 Difference]: With dead ends: 27397 [2021-06-05 05:38:40,178 INFO L226 Difference]: Without dead ends: 27397 [2021-06-05 05:38:40,178 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 114.4ms TimeCoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:38:40,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27397 states. [2021-06-05 05:38:40,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27397 to 26148. [2021-06-05 05:38:40,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26148 states, 26147 states have (on average 3.595861857956936) internal successors, (94021), 26147 states have internal predecessors, (94021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:38:40,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26148 states to 26148 states and 94021 transitions. [2021-06-05 05:38:40,601 INFO L78 Accepts]: Start accepts. Automaton has 26148 states and 94021 transitions. Word has length 23 [2021-06-05 05:38:40,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:38:40,601 INFO L482 AbstractCegarLoop]: Abstraction has 26148 states and 94021 transitions. [2021-06-05 05:38:40,601 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.5) 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) [2021-06-05 05:38:40,601 INFO L276 IsEmpty]: Start isEmpty. Operand 26148 states and 94021 transitions. [2021-06-05 05:38:40,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:38:40,626 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:38:40,626 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:38:40,826 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:38:40,826 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:38:40,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:38:40,826 INFO L82 PathProgramCache]: Analyzing trace with hash 472108223, now seen corresponding path program 32 times [2021-06-05 05:38:40,827 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:38:40,827 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155791635] [2021-06-05 05:38:40,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:38:40,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:38:40,876 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:38:40,876 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:38:40,876 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155791635] [2021-06-05 05:38:40,876 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1155791635] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:38:40,876 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204894506] [2021-06-05 05:38:40,876 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:38:40,898 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:38:40,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:38:40,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 05:38:40,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:38:40,969 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:38:40,970 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1204894506] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:38:40,970 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:38:40,970 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2021-06-05 05:38:40,970 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109558033] [2021-06-05 05:38:40,970 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 05:38:40,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:38:40,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 05:38:40,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-06-05 05:38:40,970 INFO L87 Difference]: Start difference. First operand 26148 states and 94021 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:38:41,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:38:41,348 INFO L93 Difference]: Finished difference Result 42723 states and 155237 transitions. [2021-06-05 05:38:41,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 05:38:41,348 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:38:41,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:38:41,439 INFO L225 Difference]: With dead ends: 42723 [2021-06-05 05:38:41,439 INFO L226 Difference]: Without dead ends: 42723 [2021-06-05 05:38:41,439 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 171.0ms TimeCoverageRelationStatistics Valid=153, Invalid=267, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:38:41,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42723 states. [2021-06-05 05:38:41,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42723 to 21505. [2021-06-05 05:38:41,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21505 states, 21504 states have (on average 3.5904482886904763) internal successors, (77209), 21504 states have internal predecessors, (77209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:38:41,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21505 states to 21505 states and 77209 transitions. [2021-06-05 05:38:41,926 INFO L78 Accepts]: Start accepts. Automaton has 21505 states and 77209 transitions. Word has length 23 [2021-06-05 05:38:41,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:38:41,926 INFO L482 AbstractCegarLoop]: Abstraction has 21505 states and 77209 transitions. [2021-06-05 05:38:41,926 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:38:41,926 INFO L276 IsEmpty]: Start isEmpty. Operand 21505 states and 77209 transitions. [2021-06-05 05:38:41,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:38:41,948 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:38:41,948 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:38:42,148 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-06-05 05:38:42,149 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:38:42,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:38:42,149 INFO L82 PathProgramCache]: Analyzing trace with hash 1491839683, now seen corresponding path program 33 times [2021-06-05 05:38:42,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:38:42,149 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68543859] [2021-06-05 05:38:42,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:38:42,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:38:42,198 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:38:42,198 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:38:42,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68543859] [2021-06-05 05:38:42,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68543859] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:38:42,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [323450060] [2021-06-05 05:38:42,198 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:38:42,237 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:38:42,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:38:42,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 05:38:42,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:38:42,312 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:38:42,312 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [323450060] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:38:42,312 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:38:42,312 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2021-06-05 05:38:42,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168149624] [2021-06-05 05:38:42,312 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 05:38:42,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:38:42,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 05:38:42,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-06-05 05:38:42,313 INFO L87 Difference]: Start difference. First operand 21505 states and 77209 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:38:42,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:38:42,644 INFO L93 Difference]: Finished difference Result 32944 states and 119221 transitions. [2021-06-05 05:38:42,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 05:38:42,644 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:38:42,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:38:42,711 INFO L225 Difference]: With dead ends: 32944 [2021-06-05 05:38:42,711 INFO L226 Difference]: Without dead ends: 32944 [2021-06-05 05:38:42,712 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 170.1ms TimeCoverageRelationStatistics Valid=151, Invalid=269, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:38:42,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32944 states. [2021-06-05 05:38:43,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32944 to 25922. [2021-06-05 05:38:43,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25922 states, 25921 states have (on average 3.586397129740365) internal successors, (92963), 25921 states have internal predecessors, (92963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:38:43,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25922 states to 25922 states and 92963 transitions. [2021-06-05 05:38:43,164 INFO L78 Accepts]: Start accepts. Automaton has 25922 states and 92963 transitions. Word has length 23 [2021-06-05 05:38:43,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:38:43,164 INFO L482 AbstractCegarLoop]: Abstraction has 25922 states and 92963 transitions. [2021-06-05 05:38:43,164 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:38:43,164 INFO L276 IsEmpty]: Start isEmpty. Operand 25922 states and 92963 transitions. [2021-06-05 05:38:43,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:38:43,189 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:38:43,189 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:38:43,401 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:38:43,401 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:38:43,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:38:43,401 INFO L82 PathProgramCache]: Analyzing trace with hash -1489861369, now seen corresponding path program 34 times [2021-06-05 05:38:43,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:38:43,401 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825436517] [2021-06-05 05:38:43,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:38:43,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:38:43,485 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:38:43,485 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:38:43,485 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825436517] [2021-06-05 05:38:43,485 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825436517] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:38:43,485 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476272646] [2021-06-05 05:38:43,485 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:38:43,507 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:38:43,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:38:43,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 05:38:43,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:38:43,563 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:38:43,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [476272646] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:38:43,564 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:38:43,564 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-06-05 05:38:43,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668390435] [2021-06-05 05:38:43,564 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 05:38:43,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:38:43,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 05:38:43,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-06-05 05:38:43,564 INFO L87 Difference]: Start difference. First operand 25922 states and 92963 transitions. Second operand has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:38:43,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:38:43,783 INFO L93 Difference]: Finished difference Result 26059 states and 93304 transitions. [2021-06-05 05:38:43,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 05:38:43,784 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:38:43,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:38:43,835 INFO L225 Difference]: With dead ends: 26059 [2021-06-05 05:38:43,835 INFO L226 Difference]: Without dead ends: 26010 [2021-06-05 05:38:43,835 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 103.9ms TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-06-05 05:38:43,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26010 states. [2021-06-05 05:38:44,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26010 to 25935. [2021-06-05 05:38:44,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25935 states, 25934 states have (on average 3.5862188632682965) internal successors, (93005), 25934 states have internal predecessors, (93005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:38:44,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25935 states to 25935 states and 93005 transitions. [2021-06-05 05:38:44,434 INFO L78 Accepts]: Start accepts. Automaton has 25935 states and 93005 transitions. Word has length 23 [2021-06-05 05:38:44,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:38:44,435 INFO L482 AbstractCegarLoop]: Abstraction has 25935 states and 93005 transitions. [2021-06-05 05:38:44,435 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:38:44,435 INFO L276 IsEmpty]: Start isEmpty. Operand 25935 states and 93005 transitions. [2021-06-05 05:38:44,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:38:44,462 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:38:44,462 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:38:44,663 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2021-06-05 05:38:44,663 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:38:44,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:38:44,663 INFO L82 PathProgramCache]: Analyzing trace with hash 2006065923, now seen corresponding path program 35 times [2021-06-05 05:38:44,663 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:38:44,663 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333380446] [2021-06-05 05:38:44,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:38:44,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:38:44,750 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:38:44,750 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:38:44,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333380446] [2021-06-05 05:38:44,751 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333380446] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:38:44,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1987733734] [2021-06-05 05:38:44,751 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:38:44,786 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 05:38:44,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:38:44,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 05:38:44,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:38:44,884 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:38:44,884 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1987733734] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:38:44,884 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:38:44,884 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-06-05 05:38:44,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572142039] [2021-06-05 05:38:44,885 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 05:38:44,885 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:38:44,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 05:38:44,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-06-05 05:38:44,885 INFO L87 Difference]: Start difference. First operand 25935 states and 93005 transitions. Second operand has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:38:45,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:38:45,417 INFO L93 Difference]: Finished difference Result 32792 states and 117496 transitions. [2021-06-05 05:38:45,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 05:38:45,417 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:38:45,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:38:45,483 INFO L225 Difference]: With dead ends: 32792 [2021-06-05 05:38:45,483 INFO L226 Difference]: Without dead ends: 32673 [2021-06-05 05:38:45,483 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 290.6ms TimeCoverageRelationStatistics Valid=116, Invalid=264, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:38:45,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32673 states. [2021-06-05 05:38:46,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32673 to 25932. [2021-06-05 05:38:46,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25932 states, 25931 states have (on average 3.586363811654005) internal successors, (92998), 25931 states have internal predecessors, (92998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:38:46,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25932 states to 25932 states and 92998 transitions. [2021-06-05 05:38:46,171 INFO L78 Accepts]: Start accepts. Automaton has 25932 states and 92998 transitions. Word has length 23 [2021-06-05 05:38:46,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:38:46,171 INFO L482 AbstractCegarLoop]: Abstraction has 25932 states and 92998 transitions. [2021-06-05 05:38:46,171 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:38:46,171 INFO L276 IsEmpty]: Start isEmpty. Operand 25932 states and 92998 transitions. [2021-06-05 05:38:46,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:38:46,197 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:38:46,197 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:38:46,400 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:38:46,401 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:38:46,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:38:46,401 INFO L82 PathProgramCache]: Analyzing trace with hash 1745942057, now seen corresponding path program 36 times [2021-06-05 05:38:46,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:38:46,401 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578390305] [2021-06-05 05:38:46,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:38:46,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:38:46,490 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:38:46,490 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:38:46,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578390305] [2021-06-05 05:38:46,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1578390305] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:38:46,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196611623] [2021-06-05 05:38:46,491 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:38:46,512 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:38:46,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:38:46,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 05:38:46,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:38:46,569 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:38:46,569 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [196611623] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:38:46,569 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:38:46,569 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-06-05 05:38:46,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005961448] [2021-06-05 05:38:46,570 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 05:38:46,570 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:38:46,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 05:38:46,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-06-05 05:38:46,571 INFO L87 Difference]: Start difference. First operand 25932 states and 92998 transitions. Second operand has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:38:46,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:38:46,805 INFO L93 Difference]: Finished difference Result 26059 states and 93301 transitions. [2021-06-05 05:38:46,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 05:38:46,806 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:38:46,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:38:46,859 INFO L225 Difference]: With dead ends: 26059 [2021-06-05 05:38:46,859 INFO L226 Difference]: Without dead ends: 26016 [2021-06-05 05:38:46,859 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 105.6ms TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-05 05:38:46,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26016 states. [2021-06-05 05:38:47,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26016 to 25932. [2021-06-05 05:38:47,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25932 states, 25931 states have (on average 3.586363811654005) internal successors, (92998), 25931 states have internal predecessors, (92998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:38:47,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25932 states to 25932 states and 92998 transitions. [2021-06-05 05:38:47,405 INFO L78 Accepts]: Start accepts. Automaton has 25932 states and 92998 transitions. Word has length 23 [2021-06-05 05:38:47,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:38:47,405 INFO L482 AbstractCegarLoop]: Abstraction has 25932 states and 92998 transitions. [2021-06-05 05:38:47,405 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:38:47,405 INFO L276 IsEmpty]: Start isEmpty. Operand 25932 states and 92998 transitions. [2021-06-05 05:38:47,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:38:47,431 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:38:47,432 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:38:47,632 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2021-06-05 05:38:47,632 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:38:47,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:38:47,632 INFO L82 PathProgramCache]: Analyzing trace with hash 1767697911, now seen corresponding path program 37 times [2021-06-05 05:38:47,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:38:47,633 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073356115] [2021-06-05 05:38:47,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:38:47,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:38:47,704 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:38:47,704 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:38:47,704 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073356115] [2021-06-05 05:38:47,705 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073356115] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:38:47,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [963273185] [2021-06-05 05:38:47,705 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:38:47,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:38:47,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 05:38:47,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:38:47,786 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:38:47,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [963273185] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:38:47,787 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:38:47,787 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 05:38:47,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888745442] [2021-06-05 05:38:47,787 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 05:38:47,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:38:47,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 05:38:47,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-06-05 05:38:47,788 INFO L87 Difference]: Start difference. First operand 25932 states and 92998 transitions. Second operand has 12 states, 12 states have (on average 2.5) 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) [2021-06-05 05:38:48,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:38:48,137 INFO L93 Difference]: Finished difference Result 27582 states and 98159 transitions. [2021-06-05 05:38:48,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 05:38:48,137 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5) 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 23 [2021-06-05 05:38:48,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:38:48,213 INFO L225 Difference]: With dead ends: 27582 [2021-06-05 05:38:48,213 INFO L226 Difference]: Without dead ends: 27582 [2021-06-05 05:38:48,214 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 146.4ms TimeCoverageRelationStatistics Valid=94, Invalid=248, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:38:48,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27582 states. [2021-06-05 05:38:48,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27582 to 26354. [2021-06-05 05:38:48,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26354 states, 26353 states have (on average 3.585436193222783) internal successors, (94487), 26353 states have internal predecessors, (94487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:38:48,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26354 states to 26354 states and 94487 transitions. [2021-06-05 05:38:48,960 INFO L78 Accepts]: Start accepts. Automaton has 26354 states and 94487 transitions. Word has length 23 [2021-06-05 05:38:48,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:38:48,960 INFO L482 AbstractCegarLoop]: Abstraction has 26354 states and 94487 transitions. [2021-06-05 05:38:48,960 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.5) 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) [2021-06-05 05:38:48,960 INFO L276 IsEmpty]: Start isEmpty. Operand 26354 states and 94487 transitions. [2021-06-05 05:38:48,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:38:48,985 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:38:48,985 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:38:49,185 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:38:49,186 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:38:49,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:38:49,186 INFO L82 PathProgramCache]: Analyzing trace with hash 1625128567, now seen corresponding path program 38 times [2021-06-05 05:38:49,186 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:38:49,186 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848302756] [2021-06-05 05:38:49,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:38:49,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:38:49,234 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:38:49,234 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:38:49,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848302756] [2021-06-05 05:38:49,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848302756] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:38:49,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [441600122] [2021-06-05 05:38:49,234 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:38:49,256 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:38:49,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:38:49,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 05:38:49,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:38:49,322 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:38:49,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [441600122] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:38:49,323 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:38:49,323 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 05:38:49,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51317078] [2021-06-05 05:38:49,323 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 05:38:49,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:38:49,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 05:38:49,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-06-05 05:38:49,323 INFO L87 Difference]: Start difference. First operand 26354 states and 94487 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:38:49,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:38:49,639 INFO L93 Difference]: Finished difference Result 35465 states and 126867 transitions. [2021-06-05 05:38:49,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 05:38:49,640 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:38:49,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:38:49,852 INFO L225 Difference]: With dead ends: 35465 [2021-06-05 05:38:49,852 INFO L226 Difference]: Without dead ends: 35465 [2021-06-05 05:38:49,852 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 146.7ms TimeCoverageRelationStatistics Valid=125, Invalid=217, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:38:49,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35465 states. [2021-06-05 05:38:50,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35465 to 25981. [2021-06-05 05:38:50,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25981 states, 25980 states have (on average 3.5869515011547346) internal successors, (93189), 25980 states have internal predecessors, (93189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:38:50,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25981 states to 25981 states and 93189 transitions. [2021-06-05 05:38:50,390 INFO L78 Accepts]: Start accepts. Automaton has 25981 states and 93189 transitions. Word has length 23 [2021-06-05 05:38:50,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:38:50,390 INFO L482 AbstractCegarLoop]: Abstraction has 25981 states and 93189 transitions. [2021-06-05 05:38:50,390 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:38:50,390 INFO L276 IsEmpty]: Start isEmpty. Operand 25981 states and 93189 transitions. [2021-06-05 05:38:50,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:38:50,415 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:38:50,415 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:38:50,616 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-06-05 05:38:50,616 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:38:50,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:38:50,616 INFO L82 PathProgramCache]: Analyzing trace with hash 685163967, now seen corresponding path program 39 times [2021-06-05 05:38:50,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:38:50,616 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386044135] [2021-06-05 05:38:50,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:38:50,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:38:50,705 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:38:50,706 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:38:50,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386044135] [2021-06-05 05:38:50,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386044135] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:38:50,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [877583840] [2021-06-05 05:38:50,706 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:38:50,738 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 05:38:50,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:38:50,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 05:38:50,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:38:50,795 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:38:50,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [877583840] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:38:50,795 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:38:50,795 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-06-05 05:38:50,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260910617] [2021-06-05 05:38:50,796 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 05:38:50,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:38:50,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 05:38:50,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-06-05 05:38:50,796 INFO L87 Difference]: Start difference. First operand 25981 states and 93189 transitions. Second operand has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:38:51,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:38:51,032 INFO L93 Difference]: Finished difference Result 26050 states and 93338 transitions. [2021-06-05 05:38:51,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 05:38:51,032 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:38:51,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:38:51,084 INFO L225 Difference]: With dead ends: 26050 [2021-06-05 05:38:51,084 INFO L226 Difference]: Without dead ends: 26007 [2021-06-05 05:38:51,084 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 116.3ms TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 05:38:51,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26007 states. [2021-06-05 05:38:51,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26007 to 25986. [2021-06-05 05:38:51,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25986 states, 25985 states have (on average 3.586800076967481) internal successors, (93203), 25985 states have internal predecessors, (93203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:38:51,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25986 states to 25986 states and 93203 transitions. [2021-06-05 05:38:51,625 INFO L78 Accepts]: Start accepts. Automaton has 25986 states and 93203 transitions. Word has length 23 [2021-06-05 05:38:51,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:38:51,625 INFO L482 AbstractCegarLoop]: Abstraction has 25986 states and 93203 transitions. [2021-06-05 05:38:51,625 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:38:51,625 INFO L276 IsEmpty]: Start isEmpty. Operand 25986 states and 93203 transitions. [2021-06-05 05:38:51,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:38:51,818 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:38:51,818 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:38:52,028 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:38:52,029 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:38:52,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:38:52,029 INFO L82 PathProgramCache]: Analyzing trace with hash 706919821, now seen corresponding path program 40 times [2021-06-05 05:38:52,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:38:52,029 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888903207] [2021-06-05 05:38:52,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:38:52,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:38:52,092 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:38:52,093 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:38:52,093 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888903207] [2021-06-05 05:38:52,093 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888903207] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:38:52,093 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1477889430] [2021-06-05 05:38:52,093 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:38:52,113 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:38:52,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:38:52,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 05:38:52,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:38:52,163 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:38:52,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1477889430] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:38:52,164 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:38:52,164 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 05:38:52,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660815770] [2021-06-05 05:38:52,164 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 05:38:52,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:38:52,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 05:38:52,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-06-05 05:38:52,165 INFO L87 Difference]: Start difference. First operand 25986 states and 93203 transitions. Second operand has 12 states, 12 states have (on average 2.5) 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) [2021-06-05 05:38:52,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:38:52,459 INFO L93 Difference]: Finished difference Result 29926 states and 106677 transitions. [2021-06-05 05:38:52,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 05:38:52,459 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5) 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 23 [2021-06-05 05:38:52,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:38:52,520 INFO L225 Difference]: With dead ends: 29926 [2021-06-05 05:38:52,520 INFO L226 Difference]: Without dead ends: 29926 [2021-06-05 05:38:52,520 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 130.0ms TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:38:52,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29926 states. [2021-06-05 05:38:53,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29926 to 28815. [2021-06-05 05:38:53,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28815 states, 28814 states have (on average 3.58617338793642) internal successors, (103332), 28814 states have internal predecessors, (103332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:38:53,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28815 states to 28815 states and 103332 transitions. [2021-06-05 05:38:53,185 INFO L78 Accepts]: Start accepts. Automaton has 28815 states and 103332 transitions. Word has length 23 [2021-06-05 05:38:53,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:38:53,185 INFO L482 AbstractCegarLoop]: Abstraction has 28815 states and 103332 transitions. [2021-06-05 05:38:53,185 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.5) 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) [2021-06-05 05:38:53,185 INFO L276 IsEmpty]: Start isEmpty. Operand 28815 states and 103332 transitions. [2021-06-05 05:38:53,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:38:53,212 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:38:53,212 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:38:53,428 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:38:53,429 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:38:53,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:38:53,429 INFO L82 PathProgramCache]: Analyzing trace with hash -1807581121, now seen corresponding path program 41 times [2021-06-05 05:38:53,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:38:53,429 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066980694] [2021-06-05 05:38:53,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:38:53,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:38:53,463 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:38:53,463 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:38:53,463 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066980694] [2021-06-05 05:38:53,463 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066980694] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:38:53,463 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239826544] [2021-06-05 05:38:53,463 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:38:53,486 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 05:38:53,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:38:53,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 05:38:53,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:38:53,529 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:38:53,529 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1239826544] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:38:53,529 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:38:53,529 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-05 05:38:53,529 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653712063] [2021-06-05 05:38:53,529 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 05:38:53,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:38:53,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 05:38:53,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-06-05 05:38:53,530 INFO L87 Difference]: Start difference. First operand 28815 states and 103332 transitions. Second operand has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:38:53,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:38:53,832 INFO L93 Difference]: Finished difference Result 29526 states and 105293 transitions. [2021-06-05 05:38:53,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 05:38:53,832 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:38:53,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:38:53,895 INFO L225 Difference]: With dead ends: 29526 [2021-06-05 05:38:53,896 INFO L226 Difference]: Without dead ends: 29526 [2021-06-05 05:38:53,896 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 93.9ms TimeCoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-06-05 05:38:53,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29526 states. [2021-06-05 05:38:54,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29526 to 28856. [2021-06-05 05:38:54,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28856 states, 28855 states have (on average 3.585617743891873) internal successors, (103463), 28855 states have internal predecessors, (103463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:38:54,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28856 states to 28856 states and 103463 transitions. [2021-06-05 05:38:54,653 INFO L78 Accepts]: Start accepts. Automaton has 28856 states and 103463 transitions. Word has length 23 [2021-06-05 05:38:54,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:38:54,653 INFO L482 AbstractCegarLoop]: Abstraction has 28856 states and 103463 transitions. [2021-06-05 05:38:54,653 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:38:54,653 INFO L276 IsEmpty]: Start isEmpty. Operand 28856 states and 103463 transitions. [2021-06-05 05:38:54,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:38:54,681 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:38:54,681 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:38:54,881 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2021-06-05 05:38:54,882 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:38:54,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:38:54,882 INFO L82 PathProgramCache]: Analyzing trace with hash 817141951, now seen corresponding path program 16 times [2021-06-05 05:38:54,882 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:38:54,882 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928076105] [2021-06-05 05:38:54,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:38:54,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:38:54,956 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:38:54,957 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:38:54,957 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928076105] [2021-06-05 05:38:54,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928076105] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:38:54,957 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1216007422] [2021-06-05 05:38:54,957 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 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:38:54,983 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:38:54,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:38:54,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 05:38:54,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:38:55,035 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:38:55,036 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1216007422] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:38:55,036 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:38:55,036 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-05 05:38:55,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114392046] [2021-06-05 05:38:55,036 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 05:38:55,036 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:38:55,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 05:38:55,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-05 05:38:55,037 INFO L87 Difference]: Start difference. First operand 28856 states and 103463 transitions. Second operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:38:55,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:38:55,219 INFO L93 Difference]: Finished difference Result 29072 states and 104061 transitions. [2021-06-05 05:38:55,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 05:38:55,220 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:38:55,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:38:55,277 INFO L225 Difference]: With dead ends: 29072 [2021-06-05 05:38:55,277 INFO L226 Difference]: Without dead ends: 29019 [2021-06-05 05:38:55,277 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 20 SyntacticMatches, 5 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 55.4ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-05 05:38:55,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29019 states. [2021-06-05 05:38:55,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29019 to 28851. [2021-06-05 05:38:55,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28851 states, 28850 states have (on average 3.5844367417677643) internal successors, (103411), 28850 states have internal predecessors, (103411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:38:56,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28851 states to 28851 states and 103411 transitions. [2021-06-05 05:38:56,001 INFO L78 Accepts]: Start accepts. Automaton has 28851 states and 103411 transitions. Word has length 23 [2021-06-05 05:38:56,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:38:56,001 INFO L482 AbstractCegarLoop]: Abstraction has 28851 states and 103411 transitions. [2021-06-05 05:38:56,001 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:38:56,002 INFO L276 IsEmpty]: Start isEmpty. Operand 28851 states and 103411 transitions. [2021-06-05 05:38:56,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:38:56,036 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:38:56,036 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:38:56,236 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2021-06-05 05:38:56,237 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:38:56,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:38:56,237 INFO L82 PathProgramCache]: Analyzing trace with hash 2049439803, now seen corresponding path program 42 times [2021-06-05 05:38:56,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:38:56,237 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682301170] [2021-06-05 05:38:56,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:38:56,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:38:56,275 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:38:56,275 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:38:56,275 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682301170] [2021-06-05 05:38:56,275 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682301170] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:38:56,275 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700240023] [2021-06-05 05:38:56,276 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:38:56,309 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:38:56,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:38:56,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 05:38:56,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:38:56,384 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:38:56,385 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [700240023] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:38:56,385 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:38:56,385 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 05:38:56,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330332115] [2021-06-05 05:38:56,385 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 05:38:56,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:38:56,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 05:38:56,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-06-05 05:38:56,385 INFO L87 Difference]: Start difference. First operand 28851 states and 103411 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:38:56,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:38:56,694 INFO L93 Difference]: Finished difference Result 37800 states and 135115 transitions. [2021-06-05 05:38:56,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 05:38:56,694 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:38:56,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:38:56,779 INFO L225 Difference]: With dead ends: 37800 [2021-06-05 05:38:56,780 INFO L226 Difference]: Without dead ends: 37800 [2021-06-05 05:38:56,780 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 99.6ms TimeCoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2021-06-05 05:38:56,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37800 states. [2021-06-05 05:38:57,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37800 to 19949. [2021-06-05 05:38:57,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19949 states, 19948 states have (on average 3.5674754361339485) internal successors, (71164), 19948 states have internal predecessors, (71164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:38:57,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19949 states to 19949 states and 71164 transitions. [2021-06-05 05:38:57,360 INFO L78 Accepts]: Start accepts. Automaton has 19949 states and 71164 transitions. Word has length 23 [2021-06-05 05:38:57,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:38:57,360 INFO L482 AbstractCegarLoop]: Abstraction has 19949 states and 71164 transitions. [2021-06-05 05:38:57,360 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:38:57,360 INFO L276 IsEmpty]: Start isEmpty. Operand 19949 states and 71164 transitions. [2021-06-05 05:38:57,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:38:57,382 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:38:57,382 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:38:57,582 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:38:57,582 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:38:57,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:38:57,583 INFO L82 PathProgramCache]: Analyzing trace with hash -1759723389, now seen corresponding path program 43 times [2021-06-05 05:38:57,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:38:57,583 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950331239] [2021-06-05 05:38:57,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:38:57,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:38:57,613 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:38:57,613 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:38:57,613 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950331239] [2021-06-05 05:38:57,613 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950331239] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:38:57,613 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2948418] [2021-06-05 05:38:57,613 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:38:57,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:38:57,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 05:38:57,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:38:57,695 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:38:57,695 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2948418] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:38:57,695 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:38:57,696 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 05:38:57,696 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477785995] [2021-06-05 05:38:57,696 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 05:38:57,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:38:57,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 05:38:57,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-06-05 05:38:57,697 INFO L87 Difference]: Start difference. First operand 19949 states and 71164 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:38:58,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:38:58,112 INFO L93 Difference]: Finished difference Result 28786 states and 101970 transitions. [2021-06-05 05:38:58,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 05:38:58,113 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:38:58,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:38:58,166 INFO L225 Difference]: With dead ends: 28786 [2021-06-05 05:38:58,167 INFO L226 Difference]: Without dead ends: 28786 [2021-06-05 05:38:58,167 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 101.7ms TimeCoverageRelationStatistics Valid=93, Invalid=213, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:38:58,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28786 states. [2021-06-05 05:38:58,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28786 to 27373. [2021-06-05 05:38:58,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27373 states, 27372 states have (on average 3.5752228554727457) internal successors, (97861), 27372 states have internal predecessors, (97861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:38:58,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27373 states to 27373 states and 97861 transitions. [2021-06-05 05:38:58,734 INFO L78 Accepts]: Start accepts. Automaton has 27373 states and 97861 transitions. Word has length 23 [2021-06-05 05:38:58,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:38:58,734 INFO L482 AbstractCegarLoop]: Abstraction has 27373 states and 97861 transitions. [2021-06-05 05:38:58,734 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:38:58,734 INFO L276 IsEmpty]: Start isEmpty. Operand 27373 states and 97861 transitions. [2021-06-05 05:38:58,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:38:58,774 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:38:58,774 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:38:58,994 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:38:58,994 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:38:58,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:38:58,995 INFO L82 PathProgramCache]: Analyzing trace with hash 208892275, now seen corresponding path program 17 times [2021-06-05 05:38:58,995 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:38:58,995 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643445457] [2021-06-05 05:38:58,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:38:58,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:38:59,029 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:38:59,029 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:38:59,029 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643445457] [2021-06-05 05:38:59,029 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643445457] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:38:59,029 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786071015] [2021-06-05 05:38:59,029 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:38:59,062 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 05:38:59,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:38:59,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 05:38:59,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:38:59,108 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:38:59,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [786071015] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:38:59,108 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:38:59,109 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-05 05:38:59,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375106603] [2021-06-05 05:38:59,109 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 05:38:59,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:38:59,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 05:38:59,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-06-05 05:38:59,110 INFO L87 Difference]: Start difference. First operand 27373 states and 97861 transitions. Second operand has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:38:59,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:38:59,296 INFO L93 Difference]: Finished difference Result 27858 states and 99275 transitions. [2021-06-05 05:38:59,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 05:38:59,297 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:38:59,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:38:59,363 INFO L225 Difference]: With dead ends: 27858 [2021-06-05 05:38:59,363 INFO L226 Difference]: Without dead ends: 27777 [2021-06-05 05:38:59,363 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 29.1ms TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-06-05 05:38:59,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27777 states. [2021-06-05 05:38:59,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27777 to 27398. [2021-06-05 05:38:59,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27398 states, 27397 states have (on average 3.575135963791656) internal successors, (97948), 27397 states have internal predecessors, (97948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:38:59,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27398 states to 27398 states and 97948 transitions. [2021-06-05 05:38:59,991 INFO L78 Accepts]: Start accepts. Automaton has 27398 states and 97948 transitions. Word has length 23 [2021-06-05 05:38:59,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:38:59,991 INFO L482 AbstractCegarLoop]: Abstraction has 27398 states and 97948 transitions. [2021-06-05 05:38:59,991 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:38:59,991 INFO L276 IsEmpty]: Start isEmpty. Operand 27398 states and 97948 transitions. [2021-06-05 05:39:00,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:39:00,021 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:39:00,021 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:39:00,221 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:39:00,222 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:39:00,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:39:00,222 INFO L82 PathProgramCache]: Analyzing trace with hash 848779567, now seen corresponding path program 44 times [2021-06-05 05:39:00,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:39:00,222 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103587284] [2021-06-05 05:39:00,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:39:00,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:39:00,253 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:39:00,253 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:39:00,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103587284] [2021-06-05 05:39:00,254 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103587284] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:39:00,254 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614079261] [2021-06-05 05:39:00,254 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 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:39:00,276 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:39:00,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:39:00,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 05:39:00,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:39:00,330 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:39:00,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1614079261] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:39:00,331 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:39:00,331 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 05:39:00,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445178458] [2021-06-05 05:39:00,331 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 05:39:00,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:39:00,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 05:39:00,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-06-05 05:39:00,332 INFO L87 Difference]: Start difference. First operand 27398 states and 97948 transitions. Second operand has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:39:00,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:39:00,697 INFO L93 Difference]: Finished difference Result 38461 states and 138552 transitions. [2021-06-05 05:39:00,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 05:39:00,697 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:39:00,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:39:01,032 INFO L225 Difference]: With dead ends: 38461 [2021-06-05 05:39:01,032 INFO L226 Difference]: Without dead ends: 38461 [2021-06-05 05:39:01,033 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 116.8ms TimeCoverageRelationStatistics Valid=112, Invalid=230, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:39:01,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38461 states. [2021-06-05 05:39:01,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38461 to 24308. [2021-06-05 05:39:01,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24308 states, 24307 states have (on average 3.5794215658040893) internal successors, (87005), 24307 states have internal predecessors, (87005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:39:01,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24308 states to 24308 states and 87005 transitions. [2021-06-05 05:39:01,451 INFO L78 Accepts]: Start accepts. Automaton has 24308 states and 87005 transitions. Word has length 23 [2021-06-05 05:39:01,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:39:01,452 INFO L482 AbstractCegarLoop]: Abstraction has 24308 states and 87005 transitions. [2021-06-05 05:39:01,452 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:39:01,452 INFO L276 IsEmpty]: Start isEmpty. Operand 24308 states and 87005 transitions. [2021-06-05 05:39:01,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:39:01,478 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:39:01,478 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:39:01,678 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2021-06-05 05:39:01,679 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:39:01,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:39:01,679 INFO L82 PathProgramCache]: Analyzing trace with hash 1907900651, now seen corresponding path program 18 times [2021-06-05 05:39:01,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:39:01,679 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294531874] [2021-06-05 05:39:01,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:39:01,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:39:01,746 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:39:01,746 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:39:01,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294531874] [2021-06-05 05:39:01,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294531874] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:39:01,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1620932943] [2021-06-05 05:39:01,746 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:39:01,769 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:39:01,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:39:01,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 05:39:01,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:39:02,001 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:39:02,001 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1620932943] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:39:02,002 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:39:02,002 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-05 05:39:02,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519683926] [2021-06-05 05:39:02,002 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 05:39:02,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:39:02,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 05:39:02,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-05 05:39:02,002 INFO L87 Difference]: Start difference. First operand 24308 states and 87005 transitions. Second operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:39:02,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:39:02,153 INFO L93 Difference]: Finished difference Result 24924 states and 88837 transitions. [2021-06-05 05:39:02,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 05:39:02,153 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:39:02,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:39:02,203 INFO L225 Difference]: With dead ends: 24924 [2021-06-05 05:39:02,203 INFO L226 Difference]: Without dead ends: 24835 [2021-06-05 05:39:02,203 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 51.4ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-05 05:39:02,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24835 states. [2021-06-05 05:39:02,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24835 to 24301. [2021-06-05 05:39:02,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24301 states, 24300 states have (on average 3.579835390946502) internal successors, (86990), 24300 states have internal predecessors, (86990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:39:02,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24301 states to 24301 states and 86990 transitions. [2021-06-05 05:39:02,794 INFO L78 Accepts]: Start accepts. Automaton has 24301 states and 86990 transitions. Word has length 23 [2021-06-05 05:39:02,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:39:02,794 INFO L482 AbstractCegarLoop]: Abstraction has 24301 states and 86990 transitions. [2021-06-05 05:39:02,794 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:39:02,794 INFO L276 IsEmpty]: Start isEmpty. Operand 24301 states and 86990 transitions. [2021-06-05 05:39:02,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:39:02,827 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:39:02,827 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:39:03,027 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2021-06-05 05:39:03,028 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:39:03,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:39:03,028 INFO L82 PathProgramCache]: Analyzing trace with hash 2012461191, now seen corresponding path program 19 times [2021-06-05 05:39:03,028 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:39:03,028 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280821423] [2021-06-05 05:39:03,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:39:03,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:39:03,080 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 05:39:03,080 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:39:03,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280821423] [2021-06-05 05:39:03,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280821423] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:39:03,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832671478] [2021-06-05 05:39:03,081 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:39:03,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:39:03,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 05:39:03,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:39:03,147 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 05:39:03,147 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [832671478] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:39:03,147 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:39:03,147 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-05 05:39:03,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997727299] [2021-06-05 05:39:03,148 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 05:39:03,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:39:03,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 05:39:03,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-05 05:39:03,149 INFO L87 Difference]: Start difference. First operand 24301 states and 86990 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:39:03,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:39:03,295 INFO L93 Difference]: Finished difference Result 24748 states and 88285 transitions. [2021-06-05 05:39:03,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 05:39:03,296 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:39:03,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:39:03,349 INFO L225 Difference]: With dead ends: 24748 [2021-06-05 05:39:03,349 INFO L226 Difference]: Without dead ends: 24675 [2021-06-05 05:39:03,349 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 47.8ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-05 05:39:03,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24675 states. [2021-06-05 05:39:03,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24675 to 24351. [2021-06-05 05:39:03,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24351 states, 24350 states have (on average 3.5791786447638603) internal successors, (87153), 24350 states have internal predecessors, (87153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:39:04,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24351 states to 24351 states and 87153 transitions. [2021-06-05 05:39:04,015 INFO L78 Accepts]: Start accepts. Automaton has 24351 states and 87153 transitions. Word has length 23 [2021-06-05 05:39:04,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:39:04,015 INFO L482 AbstractCegarLoop]: Abstraction has 24351 states and 87153 transitions. [2021-06-05 05:39:04,015 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:39:04,015 INFO L276 IsEmpty]: Start isEmpty. Operand 24351 states and 87153 transitions. [2021-06-05 05:39:04,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:39:04,047 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:39:04,047 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:39:04,247 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2021-06-05 05:39:04,247 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:39:04,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:39:04,248 INFO L82 PathProgramCache]: Analyzing trace with hash 1545638063, now seen corresponding path program 20 times [2021-06-05 05:39:04,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:39:04,248 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861954875] [2021-06-05 05:39:04,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:39:04,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:39:04,303 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:39:04,303 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:39:04,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861954875] [2021-06-05 05:39:04,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [861954875] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:39:04,304 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [722611032] [2021-06-05 05:39:04,304 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:39:04,345 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:39:04,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:39:04,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 05:39:04,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:39:04,398 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:39:04,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [722611032] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:39:04,398 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:39:04,398 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-05 05:39:04,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883595141] [2021-06-05 05:39:04,398 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 05:39:04,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:39:04,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 05:39:04,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-05 05:39:04,399 INFO L87 Difference]: Start difference. First operand 24351 states and 87153 transitions. Second operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:39:04,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:39:04,622 INFO L93 Difference]: Finished difference Result 24905 states and 88675 transitions. [2021-06-05 05:39:04,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 05:39:04,623 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:39:04,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:39:04,680 INFO L225 Difference]: With dead ends: 24905 [2021-06-05 05:39:04,680 INFO L226 Difference]: Without dead ends: 24844 [2021-06-05 05:39:04,680 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 20 SyntacticMatches, 5 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 44.7ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-05 05:39:04,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24844 states. [2021-06-05 05:39:05,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24844 to 24401. [2021-06-05 05:39:05,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24401 states, 24400 states have (on average 3.5781147540983604) internal successors, (87306), 24400 states have internal predecessors, (87306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:39:05,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24401 states to 24401 states and 87306 transitions. [2021-06-05 05:39:05,397 INFO L78 Accepts]: Start accepts. Automaton has 24401 states and 87306 transitions. Word has length 23 [2021-06-05 05:39:05,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:39:05,397 INFO L482 AbstractCegarLoop]: Abstraction has 24401 states and 87306 transitions. [2021-06-05 05:39:05,397 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:39:05,397 INFO L276 IsEmpty]: Start isEmpty. Operand 24401 states and 87306 transitions. [2021-06-05 05:39:05,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:39:05,443 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:39:05,443 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:39:05,656 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-06-05 05:39:05,657 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:39:05,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:39:05,657 INFO L82 PathProgramCache]: Analyzing trace with hash 322190439, now seen corresponding path program 45 times [2021-06-05 05:39:05,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:39:05,657 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587458487] [2021-06-05 05:39:05,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:39:05,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:39:05,703 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:39:05,703 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:39:05,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587458487] [2021-06-05 05:39:05,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587458487] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:39:05,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [639963291] [2021-06-05 05:39:05,703 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:39:05,725 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 05:39:05,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:39:05,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 05:39:05,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:39:05,785 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:39:05,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [639963291] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:39:05,786 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:39:05,786 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 05:39:05,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310536857] [2021-06-05 05:39:05,786 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 05:39:05,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:39:05,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 05:39:05,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-06-05 05:39:05,786 INFO L87 Difference]: Start difference. First operand 24401 states and 87306 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:39:06,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:39:06,165 INFO L93 Difference]: Finished difference Result 66091 states and 236252 transitions. [2021-06-05 05:39:06,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 05:39:06,165 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:39:06,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:39:06,343 INFO L225 Difference]: With dead ends: 66091 [2021-06-05 05:39:06,343 INFO L226 Difference]: Without dead ends: 66077 [2021-06-05 05:39:06,343 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 85.7ms TimeCoverageRelationStatistics Valid=79, Invalid=131, Unknown=0, NotChecked=0, Total=210 [2021-06-05 05:39:06,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66077 states. [2021-06-05 05:39:08,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66077 to 64280. [2021-06-05 05:39:08,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64280 states, 64279 states have (on average 3.5925574448886883) internal successors, (230926), 64279 states have internal predecessors, (230926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:39:08,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64280 states to 64280 states and 230926 transitions. [2021-06-05 05:39:08,277 INFO L78 Accepts]: Start accepts. Automaton has 64280 states and 230926 transitions. Word has length 23 [2021-06-05 05:39:08,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:39:08,277 INFO L482 AbstractCegarLoop]: Abstraction has 64280 states and 230926 transitions. [2021-06-05 05:39:08,277 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:39:08,278 INFO L276 IsEmpty]: Start isEmpty. Operand 64280 states and 230926 transitions. [2021-06-05 05:39:08,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:39:08,340 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:39:08,340 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:39:08,541 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable126 [2021-06-05 05:39:08,541 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:39:08,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:39:08,542 INFO L82 PathProgramCache]: Analyzing trace with hash 749275825, now seen corresponding path program 21 times [2021-06-05 05:39:08,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:39:08,542 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166587756] [2021-06-05 05:39:08,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:39:08,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:39:08,666 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:39:08,667 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:39:08,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166587756] [2021-06-05 05:39:08,667 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166587756] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:39:08,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570329517] [2021-06-05 05:39:08,667 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 [2021-06-05 05:39:08,698 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:39:08,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:39:08,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 05:39:08,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:39:08,746 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:39:08,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1570329517] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:39:08,747 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:39:08,747 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-05 05:39:08,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088001233] [2021-06-05 05:39:08,747 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 05:39:08,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:39:08,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 05:39:08,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-05 05:39:08,747 INFO L87 Difference]: Start difference. First operand 64280 states and 230926 transitions. Second operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:39:09,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:39:09,113 INFO L93 Difference]: Finished difference Result 64761 states and 232372 transitions. [2021-06-05 05:39:09,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 05:39:09,114 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:39:09,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:39:09,643 INFO L225 Difference]: With dead ends: 64761 [2021-06-05 05:39:09,643 INFO L226 Difference]: Without dead ends: 64712 [2021-06-05 05:39:09,643 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 20 SyntacticMatches, 5 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 66.4ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-05 05:39:09,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64712 states. [2021-06-05 05:39:10,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64712 to 64330. [2021-06-05 05:39:10,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64330 states, 64329 states have (on average 3.592516594382005) internal successors, (231103), 64329 states have internal predecessors, (231103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:39:10,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64330 states to 64330 states and 231103 transitions. [2021-06-05 05:39:10,961 INFO L78 Accepts]: Start accepts. Automaton has 64330 states and 231103 transitions. Word has length 23 [2021-06-05 05:39:10,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:39:10,961 INFO L482 AbstractCegarLoop]: Abstraction has 64330 states and 231103 transitions. [2021-06-05 05:39:10,961 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:39:10,961 INFO L276 IsEmpty]: Start isEmpty. Operand 64330 states and 231103 transitions. [2021-06-05 05:39:11,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 05:39:11,022 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:39:11,022 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:39:11,223 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable127 [2021-06-05 05:39:11,223 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:39:11,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:39:11,223 INFO L82 PathProgramCache]: Analyzing trace with hash -854673189, now seen corresponding path program 21 times [2021-06-05 05:39:11,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:39:11,223 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702832935] [2021-06-05 05:39:11,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:39:11,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:39:11,261 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:39:11,261 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:39:11,261 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702832935] [2021-06-05 05:39:11,261 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702832935] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:39:11,261 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [542379923] [2021-06-05 05:39:11,261 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:39:11,283 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 05:39:11,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:39:11,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 05:39:11,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:39:11,339 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:39:11,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [542379923] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:39:11,339 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:39:11,339 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 05:39:11,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543632722] [2021-06-05 05:39:11,339 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 05:39:11,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:39:11,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 05:39:11,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-06-05 05:39:11,340 INFO L87 Difference]: Start difference. First operand 64330 states and 231103 transitions. Second operand has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:39:12,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:39:12,417 INFO L93 Difference]: Finished difference Result 123260 states and 445775 transitions. [2021-06-05 05:39:12,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 05:39:12,418 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 05:39:12,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:39:12,771 INFO L225 Difference]: With dead ends: 123260 [2021-06-05 05:39:12,771 INFO L226 Difference]: Without dead ends: 123260 [2021-06-05 05:39:12,771 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 118.7ms TimeCoverageRelationStatistics Valid=122, Invalid=258, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:39:12,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123260 states. [2021-06-05 05:39:14,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123260 to 75397. [2021-06-05 05:39:14,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75397 states, 75396 states have (on average 3.5951376730861053) internal successors, (271059), 75396 states have internal predecessors, (271059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:39:14,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75397 states to 75397 states and 271059 transitions. [2021-06-05 05:39:14,931 INFO L78 Accepts]: Start accepts. Automaton has 75397 states and 271059 transitions. Word has length 25 [2021-06-05 05:39:14,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:39:14,931 INFO L482 AbstractCegarLoop]: Abstraction has 75397 states and 271059 transitions. [2021-06-05 05:39:14,931 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:39:14,931 INFO L276 IsEmpty]: Start isEmpty. Operand 75397 states and 271059 transitions. [2021-06-05 05:39:15,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 05:39:15,043 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:39:15,043 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:39:15,244 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:39:15,244 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:39:15,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:39:15,244 INFO L82 PathProgramCache]: Analyzing trace with hash 1488955305, now seen corresponding path program 46 times [2021-06-05 05:39:15,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:39:15,245 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70032739] [2021-06-05 05:39:15,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:39:15,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:39:15,325 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:39:15,325 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:39:15,325 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70032739] [2021-06-05 05:39:15,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70032739] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:39:15,325 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1023545796] [2021-06-05 05:39:15,325 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:39:15,356 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:39:15,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:39:15,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 05:39:15,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:39:15,411 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:39:15,411 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1023545796] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:39:15,411 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:39:15,411 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-06-05 05:39:15,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434518669] [2021-06-05 05:39:15,411 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 05:39:15,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:39:15,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 05:39:15,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-06-05 05:39:15,412 INFO L87 Difference]: Start difference. First operand 75397 states and 271059 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:39:15,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:39:15,898 INFO L93 Difference]: Finished difference Result 76364 states and 274028 transitions. [2021-06-05 05:39:15,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 05:39:15,898 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 05:39:15,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:39:16,098 INFO L225 Difference]: With dead ends: 76364 [2021-06-05 05:39:16,099 INFO L226 Difference]: Without dead ends: 76324 [2021-06-05 05:39:16,099 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 74.1ms TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-06-05 05:39:16,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76324 states. [2021-06-05 05:39:17,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76324 to 75532. [2021-06-05 05:39:17,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75532 states, 75531 states have (on average 3.5951993221326344) internal successors, (271549), 75531 states have internal predecessors, (271549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:39:18,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75532 states to 75532 states and 271549 transitions. [2021-06-05 05:39:18,029 INFO L78 Accepts]: Start accepts. Automaton has 75532 states and 271549 transitions. Word has length 25 [2021-06-05 05:39:18,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:39:18,029 INFO L482 AbstractCegarLoop]: Abstraction has 75532 states and 271549 transitions. [2021-06-05 05:39:18,029 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:39:18,029 INFO L276 IsEmpty]: Start isEmpty. Operand 75532 states and 271549 transitions. [2021-06-05 05:39:18,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 05:39:18,127 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:39:18,127 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:39:18,327 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:39:18,327 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:39:18,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:39:18,328 INFO L82 PathProgramCache]: Analyzing trace with hash 608516245, now seen corresponding path program 47 times [2021-06-05 05:39:18,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:39:18,328 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594895788] [2021-06-05 05:39:18,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:39:18,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:39:18,383 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:39:18,383 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:39:18,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594895788] [2021-06-05 05:39:18,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594895788] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:39:18,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414612999] [2021-06-05 05:39:18,383 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:39:18,406 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 05:39:18,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:39:18,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 05:39:18,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:39:18,455 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:39:18,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1414612999] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:39:18,455 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:39:18,455 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-06-05 05:39:18,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044353718] [2021-06-05 05:39:18,455 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 05:39:18,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:39:18,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 05:39:18,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-06-05 05:39:18,455 INFO L87 Difference]: Start difference. First operand 75532 states and 271549 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:39:18,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:39:18,836 INFO L93 Difference]: Finished difference Result 77328 states and 277251 transitions. [2021-06-05 05:39:18,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 05:39:18,836 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 05:39:18,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:39:19,407 INFO L225 Difference]: With dead ends: 77328 [2021-06-05 05:39:19,407 INFO L226 Difference]: Without dead ends: 77263 [2021-06-05 05:39:19,407 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 50.8ms TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-06-05 05:39:19,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77263 states. [2021-06-05 05:39:20,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77263 to 75779. [2021-06-05 05:39:20,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75779 states, 75778 states have (on average 3.595476259600412) internal successors, (272458), 75778 states have internal predecessors, (272458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:39:20,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75779 states to 75779 states and 272458 transitions. [2021-06-05 05:39:20,940 INFO L78 Accepts]: Start accepts. Automaton has 75779 states and 272458 transitions. Word has length 25 [2021-06-05 05:39:20,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:39:20,940 INFO L482 AbstractCegarLoop]: Abstraction has 75779 states and 272458 transitions. [2021-06-05 05:39:20,941 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:39:20,941 INFO L276 IsEmpty]: Start isEmpty. Operand 75779 states and 272458 transitions. [2021-06-05 05:39:21,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 05:39:21,050 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:39:21,051 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:39:21,251 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:39:21,251 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:39:21,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:39:21,252 INFO L82 PathProgramCache]: Analyzing trace with hash -924915699, now seen corresponding path program 48 times [2021-06-05 05:39:21,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:39:21,252 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602884239] [2021-06-05 05:39:21,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:39:21,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:39:21,317 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:39:21,317 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:39:21,317 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602884239] [2021-06-05 05:39:21,317 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602884239] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:39:21,317 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5344183] [2021-06-05 05:39:21,318 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:39:21,395 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 05:39:21,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:39:21,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 05:39:21,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:39:21,461 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:39:21,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [5344183] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:39:21,461 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:39:21,461 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-05 05:39:21,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875857931] [2021-06-05 05:39:21,461 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 05:39:21,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:39:21,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 05:39:21,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-06-05 05:39:21,463 INFO L87 Difference]: Start difference. First operand 75779 states and 272458 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:39:21,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:39:21,964 INFO L93 Difference]: Finished difference Result 77024 states and 276140 transitions. [2021-06-05 05:39:21,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 05:39:21,965 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 05:39:21,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:39:22,580 INFO L225 Difference]: With dead ends: 77024 [2021-06-05 05:39:22,580 INFO L226 Difference]: Without dead ends: 76999 [2021-06-05 05:39:22,580 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 7 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 66.5ms TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-06-05 05:39:22,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76999 states. [2021-06-05 05:39:23,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76999 to 75956. [2021-06-05 05:39:23,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75956 states, 75955 states have (on average 3.595707984991113) internal successors, (273112), 75955 states have internal predecessors, (273112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:39:24,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75956 states to 75956 states and 273112 transitions. [2021-06-05 05:39:24,069 INFO L78 Accepts]: Start accepts. Automaton has 75956 states and 273112 transitions. Word has length 25 [2021-06-05 05:39:24,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:39:24,070 INFO L482 AbstractCegarLoop]: Abstraction has 75956 states and 273112 transitions. [2021-06-05 05:39:24,070 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:39:24,070 INFO L276 IsEmpty]: Start isEmpty. Operand 75956 states and 273112 transitions. [2021-06-05 05:39:24,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 05:39:24,170 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:39:24,170 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:39:24,370 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable131 [2021-06-05 05:39:24,371 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:39:24,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:39:24,371 INFO L82 PathProgramCache]: Analyzing trace with hash -1967521705, now seen corresponding path program 49 times [2021-06-05 05:39:24,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:39:24,371 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672509493] [2021-06-05 05:39:24,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:39:24,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:39:24,427 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:39:24,427 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:39:24,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672509493] [2021-06-05 05:39:24,427 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672509493] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:39:24,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731052178] [2021-06-05 05:39:24,427 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:39:24,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:39:24,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 05:39:24,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:39:24,504 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:39:24,505 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [731052178] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:39:24,505 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:39:24,505 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-05 05:39:24,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076089529] [2021-06-05 05:39:24,505 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 05:39:24,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:39:24,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 05:39:24,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-06-05 05:39:24,505 INFO L87 Difference]: Start difference. First operand 75956 states and 273112 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:39:24,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:39:24,903 INFO L93 Difference]: Finished difference Result 77120 states and 276543 transitions. [2021-06-05 05:39:24,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 05:39:24,904 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 05:39:24,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:39:25,550 INFO L225 Difference]: With dead ends: 77120 [2021-06-05 05:39:25,550 INFO L226 Difference]: Without dead ends: 77074 [2021-06-05 05:39:25,550 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 48.0ms TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-06-05 05:39:25,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77074 states. [2021-06-05 05:39:26,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77074 to 76028. [2021-06-05 05:39:26,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76028 states, 76027 states have (on average 3.596209241453694) internal successors, (273409), 76027 states have internal predecessors, (273409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:39:27,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76028 states to 76028 states and 273409 transitions. [2021-06-05 05:39:27,128 INFO L78 Accepts]: Start accepts. Automaton has 76028 states and 273409 transitions. Word has length 25 [2021-06-05 05:39:27,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:39:27,128 INFO L482 AbstractCegarLoop]: Abstraction has 76028 states and 273409 transitions. [2021-06-05 05:39:27,128 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:39:27,129 INFO L276 IsEmpty]: Start isEmpty. Operand 76028 states and 273409 transitions. [2021-06-05 05:39:27,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 05:39:27,244 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:39:27,244 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:39:27,444 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:39:27,445 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:39:27,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:39:27,445 INFO L82 PathProgramCache]: Analyzing trace with hash 1225531439, now seen corresponding path program 50 times [2021-06-05 05:39:27,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:39:27,445 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399419498] [2021-06-05 05:39:27,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:39:27,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:39:27,527 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:39:27,527 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:39:27,527 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399419498] [2021-06-05 05:39:27,527 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399419498] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:39:27,527 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [502796612] [2021-06-05 05:39:27,528 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:39:27,573 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:39:27,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:39:27,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 05:39:27,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:39:27,629 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:39:27,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [502796612] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:39:27,629 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:39:27,629 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-05 05:39:27,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938434912] [2021-06-05 05:39:27,630 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 05:39:27,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:39:27,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 05:39:27,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-05 05:39:27,630 INFO L87 Difference]: Start difference. First operand 76028 states and 273409 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:39:28,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:39:28,035 INFO L93 Difference]: Finished difference Result 77628 states and 278332 transitions. [2021-06-05 05:39:28,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 05:39:28,035 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 05:39:28,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:39:28,709 INFO L225 Difference]: With dead ends: 77628 [2021-06-05 05:39:28,709 INFO L226 Difference]: Without dead ends: 77580 [2021-06-05 05:39:28,709 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 69.6ms TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-05 05:39:28,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77580 states. [2021-06-05 05:39:29,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77580 to 76129. [2021-06-05 05:39:29,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76129 states, 76128 states have (on average 3.596876313577133) internal successors, (273823), 76128 states have internal predecessors, (273823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:39:30,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76129 states to 76129 states and 273823 transitions. [2021-06-05 05:39:30,186 INFO L78 Accepts]: Start accepts. Automaton has 76129 states and 273823 transitions. Word has length 25 [2021-06-05 05:39:30,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:39:30,186 INFO L482 AbstractCegarLoop]: Abstraction has 76129 states and 273823 transitions. [2021-06-05 05:39:30,186 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:39:30,186 INFO L276 IsEmpty]: Start isEmpty. Operand 76129 states and 273823 transitions. [2021-06-05 05:39:30,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 05:39:30,283 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:39:30,283 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:39:30,483 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2021-06-05 05:39:30,483 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:39:30,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:39:30,484 INFO L82 PathProgramCache]: Analyzing trace with hash -1862961165, now seen corresponding path program 51 times [2021-06-05 05:39:30,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:39:30,484 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116072443] [2021-06-05 05:39:30,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:39:30,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:39:30,560 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:39:30,560 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:39:30,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116072443] [2021-06-05 05:39:30,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116072443] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:39:30,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [906768518] [2021-06-05 05:39:30,560 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:39:30,590 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 05:39:30,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:39:30,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 05:39:30,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:39:30,637 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:39:30,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [906768518] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:39:30,640 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:39:30,640 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-06-05 05:39:30,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726666443] [2021-06-05 05:39:30,640 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 05:39:30,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:39:30,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 05:39:30,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-06-05 05:39:30,640 INFO L87 Difference]: Start difference. First operand 76129 states and 273823 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:39:31,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:39:31,029 INFO L93 Difference]: Finished difference Result 79341 states and 284167 transitions. [2021-06-05 05:39:31,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 05:39:31,029 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 05:39:31,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:39:31,707 INFO L225 Difference]: With dead ends: 79341 [2021-06-05 05:39:31,707 INFO L226 Difference]: Without dead ends: 79297 [2021-06-05 05:39:31,707 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 68.0ms TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-06-05 05:39:31,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79297 states. [2021-06-05 05:39:33,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79297 to 76278. [2021-06-05 05:39:33,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76278 states, 76277 states have (on average 3.598096411762392) internal successors, (274452), 76277 states have internal predecessors, (274452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:39:33,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76278 states to 76278 states and 274452 transitions. [2021-06-05 05:39:33,377 INFO L78 Accepts]: Start accepts. Automaton has 76278 states and 274452 transitions. Word has length 25 [2021-06-05 05:39:33,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:39:33,377 INFO L482 AbstractCegarLoop]: Abstraction has 76278 states and 274452 transitions. [2021-06-05 05:39:33,377 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:39:33,377 INFO L276 IsEmpty]: Start isEmpty. Operand 76278 states and 274452 transitions. [2021-06-05 05:39:33,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 05:39:33,515 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:39:33,515 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:39:33,715 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2021-06-05 05:39:33,716 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:39:33,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:39:33,716 INFO L82 PathProgramCache]: Analyzing trace with hash -1408824429, now seen corresponding path program 22 times [2021-06-05 05:39:33,716 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:39:33,716 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556395820] [2021-06-05 05:39:33,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:39:33,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:39:33,748 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:39:33,748 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:39:33,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556395820] [2021-06-05 05:39:33,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556395820] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:39:33,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [57888179] [2021-06-05 05:39:33,748 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:39:33,771 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:39:33,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:39:33,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 05:39:33,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:39:33,831 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:39:33,831 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [57888179] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:39:33,831 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:39:33,832 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 05:39:33,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809799050] [2021-06-05 05:39:33,832 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 05:39:33,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:39:33,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 05:39:33,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-06-05 05:39:33,832 INFO L87 Difference]: Start difference. First operand 76278 states and 274452 transitions. Second operand has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:39:34,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:39:34,934 INFO L93 Difference]: Finished difference Result 98993 states and 359845 transitions. [2021-06-05 05:39:34,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 05:39:34,949 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 05:39:34,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:39:35,246 INFO L225 Difference]: With dead ends: 98993 [2021-06-05 05:39:35,246 INFO L226 Difference]: Without dead ends: 98979 [2021-06-05 05:39:35,246 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 102.8ms TimeCoverageRelationStatistics Valid=109, Invalid=233, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:39:35,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98979 states. [2021-06-05 05:39:36,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98979 to 21029. [2021-06-05 05:39:36,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21029 states, 21028 states have (on average 3.6255468898611376) internal successors, (76238), 21028 states have internal predecessors, (76238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:39:36,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21029 states to 21029 states and 76238 transitions. [2021-06-05 05:39:36,125 INFO L78 Accepts]: Start accepts. Automaton has 21029 states and 76238 transitions. Word has length 25 [2021-06-05 05:39:36,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:39:36,125 INFO L482 AbstractCegarLoop]: Abstraction has 21029 states and 76238 transitions. [2021-06-05 05:39:36,126 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:39:36,126 INFO L276 IsEmpty]: Start isEmpty. Operand 21029 states and 76238 transitions. [2021-06-05 05:39:36,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 05:39:36,152 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:39:36,152 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:39:36,352 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2021-06-05 05:39:36,352 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:39:36,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:39:36,353 INFO L82 PathProgramCache]: Analyzing trace with hash -1278968941, now seen corresponding path program 23 times [2021-06-05 05:39:36,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:39:36,353 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219556180] [2021-06-05 05:39:36,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:39:36,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:39:36,391 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:39:36,391 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:39:36,391 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219556180] [2021-06-05 05:39:36,391 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219556180] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:39:36,391 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1937702410] [2021-06-05 05:39:36,391 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:39:36,824 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 05:39:36,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:39:36,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 05:39:36,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:39:36,907 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:39:36,907 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1937702410] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:39:36,907 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:39:36,907 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 05:39:36,907 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638437011] [2021-06-05 05:39:36,907 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 05:39:36,907 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:39:36,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 05:39:36,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-06-05 05:39:36,908 INFO L87 Difference]: Start difference. First operand 21029 states and 76238 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:39:37,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:39:37,299 INFO L93 Difference]: Finished difference Result 52085 states and 187899 transitions. [2021-06-05 05:39:37,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 05:39:37,300 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 05:39:37,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:39:37,427 INFO L225 Difference]: With dead ends: 52085 [2021-06-05 05:39:37,428 INFO L226 Difference]: Without dead ends: 52085 [2021-06-05 05:39:37,428 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 133.9ms TimeCoverageRelationStatistics Valid=122, Invalid=220, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:39:37,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52085 states. [2021-06-05 05:39:38,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52085 to 48537. [2021-06-05 05:39:38,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48537 states, 48536 states have (on average 3.635569474204714) internal successors, (176456), 48536 states have internal predecessors, (176456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:39:38,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48537 states to 48537 states and 176456 transitions. [2021-06-05 05:39:38,501 INFO L78 Accepts]: Start accepts. Automaton has 48537 states and 176456 transitions. Word has length 25 [2021-06-05 05:39:38,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:39:38,501 INFO L482 AbstractCegarLoop]: Abstraction has 48537 states and 176456 transitions. [2021-06-05 05:39:38,501 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:39:38,501 INFO L276 IsEmpty]: Start isEmpty. Operand 48537 states and 176456 transitions. [2021-06-05 05:39:38,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 05:39:38,554 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:39:38,554 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:39:38,754 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2021-06-05 05:39:38,755 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:39:38,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:39:38,755 INFO L82 PathProgramCache]: Analyzing trace with hash -793164837, now seen corresponding path program 24 times [2021-06-05 05:39:38,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:39:38,755 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038285072] [2021-06-05 05:39:38,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:39:38,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:39:38,786 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:39:38,786 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:39:38,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038285072] [2021-06-05 05:39:38,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038285072] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:39:38,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229227048] [2021-06-05 05:39:38,786 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:39:38,810 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 05:39:38,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:39:38,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 05:39:38,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:39:38,887 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:39:38,887 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [229227048] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:39:38,887 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:39:38,887 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 05:39:38,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977932599] [2021-06-05 05:39:38,887 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 05:39:38,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:39:38,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 05:39:38,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-06-05 05:39:38,888 INFO L87 Difference]: Start difference. First operand 48537 states and 176456 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:39:39,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:39:39,339 INFO L93 Difference]: Finished difference Result 60283 states and 218124 transitions. [2021-06-05 05:39:39,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 05:39:39,340 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 05:39:39,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:39:39,485 INFO L225 Difference]: With dead ends: 60283 [2021-06-05 05:39:39,485 INFO L226 Difference]: Without dead ends: 60283 [2021-06-05 05:39:39,486 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 114.6ms TimeCoverageRelationStatistics Valid=126, Invalid=294, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:39:39,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60283 states. [2021-06-05 05:39:40,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60283 to 48697. [2021-06-05 05:39:40,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48697 states, 48696 states have (on average 3.6408739937571872) internal successors, (177296), 48696 states have internal predecessors, (177296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:39:40,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48697 states to 48697 states and 177296 transitions. [2021-06-05 05:39:40,719 INFO L78 Accepts]: Start accepts. Automaton has 48697 states and 177296 transitions. Word has length 25 [2021-06-05 05:39:40,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:39:40,719 INFO L482 AbstractCegarLoop]: Abstraction has 48697 states and 177296 transitions. [2021-06-05 05:39:40,719 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:39:40,719 INFO L276 IsEmpty]: Start isEmpty. Operand 48697 states and 177296 transitions. [2021-06-05 05:39:40,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 05:39:40,786 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:39:40,787 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:39:40,987 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,98 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:39:40,987 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:39:40,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:39:40,987 INFO L82 PathProgramCache]: Analyzing trace with hash -1183569831, now seen corresponding path program 52 times [2021-06-05 05:39:40,987 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:39:40,988 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237574440] [2021-06-05 05:39:40,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:39:40,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:39:41,071 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:39:41,072 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:39:41,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237574440] [2021-06-05 05:39:41,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237574440] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:39:41,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1331231254] [2021-06-05 05:39:41,072 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 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:39:41,102 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:39:41,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:39:41,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 05:39:41,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:39:41,212 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:39:41,212 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1331231254] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:39:41,212 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:39:41,212 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 05:39:41,212 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440549610] [2021-06-05 05:39:41,213 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 05:39:41,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:39:41,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 05:39:41,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-06-05 05:39:41,213 INFO L87 Difference]: Start difference. First operand 48697 states and 177296 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:39:42,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:39:42,057 INFO L93 Difference]: Finished difference Result 49947 states and 180898 transitions. [2021-06-05 05:39:42,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 05:39:42,057 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 05:39:42,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:39:42,191 INFO L225 Difference]: With dead ends: 49947 [2021-06-05 05:39:42,191 INFO L226 Difference]: Without dead ends: 49819 [2021-06-05 05:39:42,191 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 168.2ms TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-06-05 05:39:42,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49819 states. [2021-06-05 05:39:42,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49819 to 48821. [2021-06-05 05:39:42,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48821 states, 48820 states have (on average 3.6405981155264238) internal successors, (177734), 48820 states have internal predecessors, (177734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:39:43,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48821 states to 48821 states and 177734 transitions. [2021-06-05 05:39:43,371 INFO L78 Accepts]: Start accepts. Automaton has 48821 states and 177734 transitions. Word has length 25 [2021-06-05 05:39:43,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:39:43,371 INFO L482 AbstractCegarLoop]: Abstraction has 48821 states and 177734 transitions. [2021-06-05 05:39:43,371 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:39:43,371 INFO L276 IsEmpty]: Start isEmpty. Operand 48821 states and 177734 transitions. [2021-06-05 05:39:43,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 05:39:43,466 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:39:43,466 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:39:43,666 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:39:43,666 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:39:43,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:39:43,667 INFO L82 PathProgramCache]: Analyzing trace with hash -735311471, now seen corresponding path program 53 times [2021-06-05 05:39:43,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:39:43,667 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718352051] [2021-06-05 05:39:43,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:39:43,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:39:43,744 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:39:43,744 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:39:43,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718352051] [2021-06-05 05:39:43,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718352051] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:39:43,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [693885684] [2021-06-05 05:39:43,744 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 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:39:43,769 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 05:39:43,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:39:43,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 05:39:43,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:39:43,882 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:39:43,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [693885684] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:39:43,882 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:39:43,882 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 05:39:43,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665770471] [2021-06-05 05:39:43,882 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 05:39:43,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:39:43,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 05:39:43,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2021-06-05 05:39:43,883 INFO L87 Difference]: Start difference. First operand 48821 states and 177734 transitions. Second operand has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:39:44,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:39:44,301 INFO L93 Difference]: Finished difference Result 49466 states and 179432 transitions. [2021-06-05 05:39:44,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 05:39:44,301 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 05:39:44,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:39:44,444 INFO L225 Difference]: With dead ends: 49466 [2021-06-05 05:39:44,445 INFO L226 Difference]: Without dead ends: 49403 [2021-06-05 05:39:44,445 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 152.5ms TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:39:44,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49403 states. [2021-06-05 05:39:45,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49403 to 48835. [2021-06-05 05:39:45,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48835 states, 48834 states have (on average 3.640312077650817) internal successors, (177771), 48834 states have internal predecessors, (177771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:39:45,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48835 states to 48835 states and 177771 transitions. [2021-06-05 05:39:45,506 INFO L78 Accepts]: Start accepts. Automaton has 48835 states and 177771 transitions. Word has length 25 [2021-06-05 05:39:45,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:39:45,506 INFO L482 AbstractCegarLoop]: Abstraction has 48835 states and 177771 transitions. [2021-06-05 05:39:45,506 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:39:45,506 INFO L276 IsEmpty]: Start isEmpty. Operand 48835 states and 177771 transitions. [2021-06-05 05:39:45,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 05:39:45,565 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:39:45,565 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:39:45,766 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2021-06-05 05:39:45,766 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:39:45,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:39:45,766 INFO L82 PathProgramCache]: Analyzing trace with hash -1650392959, now seen corresponding path program 54 times [2021-06-05 05:39:45,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:39:45,766 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090680454] [2021-06-05 05:39:45,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:39:45,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:39:45,847 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:39:45,847 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:39:45,847 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090680454] [2021-06-05 05:39:45,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090680454] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:39:45,847 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [574617975] [2021-06-05 05:39:45,847 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 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:39:45,870 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:39:45,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:39:45,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 05:39:45,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:39:45,988 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:39:45,988 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [574617975] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:39:45,988 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:39:45,988 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 05:39:45,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530332452] [2021-06-05 05:39:45,989 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 05:39:45,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:39:45,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 05:39:45,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-06-05 05:39:45,989 INFO L87 Difference]: Start difference. First operand 48835 states and 177771 transitions. Second operand has 16 states, 16 states have (on average 2.5) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:39:46,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:39:46,467 INFO L93 Difference]: Finished difference Result 50050 states and 181095 transitions. [2021-06-05 05:39:46,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 05:39:46,467 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 05:39:46,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:39:46,583 INFO L225 Difference]: With dead ends: 50050 [2021-06-05 05:39:46,583 INFO L226 Difference]: Without dead ends: 49977 [2021-06-05 05:39:46,584 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 186.0ms TimeCoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:39:46,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49977 states. [2021-06-05 05:39:47,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49977 to 48876. [2021-06-05 05:39:47,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48876 states, 48875 states have (on average 3.6402046035805626) internal successors, (177915), 48875 states have internal predecessors, (177915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:39:47,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48876 states to 48876 states and 177915 transitions. [2021-06-05 05:39:47,700 INFO L78 Accepts]: Start accepts. Automaton has 48876 states and 177915 transitions. Word has length 25 [2021-06-05 05:39:47,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:39:47,700 INFO L482 AbstractCegarLoop]: Abstraction has 48876 states and 177915 transitions. [2021-06-05 05:39:47,700 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:39:47,700 INFO L276 IsEmpty]: Start isEmpty. Operand 48876 states and 177915 transitions. [2021-06-05 05:39:47,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 05:39:47,757 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:39:47,757 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:39:47,958 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:39:47,958 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:39:47,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:39:47,958 INFO L82 PathProgramCache]: Analyzing trace with hash 697526461, now seen corresponding path program 55 times [2021-06-05 05:39:47,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:39:47,958 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703668775] [2021-06-05 05:39:47,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:39:47,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:39:48,023 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:39:48,024 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:39:48,024 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703668775] [2021-06-05 05:39:48,024 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703668775] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:39:48,024 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1803438042] [2021-06-05 05:39:48,024 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 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:39:48,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:39:48,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 05:39:48,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:39:48,166 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:39:48,166 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1803438042] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:39:48,166 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:39:48,166 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 05:39:48,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854100416] [2021-06-05 05:39:48,167 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 05:39:48,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:39:48,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 05:39:48,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-06-05 05:39:48,167 INFO L87 Difference]: Start difference. First operand 48876 states and 177915 transitions. Second operand has 16 states, 16 states have (on average 2.5) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:39:49,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:39:49,141 INFO L93 Difference]: Finished difference Result 49588 states and 179721 transitions. [2021-06-05 05:39:49,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 05:39:49,141 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 05:39:49,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:39:49,265 INFO L225 Difference]: With dead ends: 49588 [2021-06-05 05:39:49,265 INFO L226 Difference]: Without dead ends: 49563 [2021-06-05 05:39:49,265 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 225.9ms TimeCoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:39:49,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49563 states. [2021-06-05 05:39:49,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49563 to 48888. [2021-06-05 05:39:49,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48888 states, 48887 states have (on average 3.6404770184302575) internal successors, (177972), 48887 states have internal predecessors, (177972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:39:49,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48888 states to 48888 states and 177972 transitions. [2021-06-05 05:39:49,993 INFO L78 Accepts]: Start accepts. Automaton has 48888 states and 177972 transitions. Word has length 25 [2021-06-05 05:39:49,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:39:49,993 INFO L482 AbstractCegarLoop]: Abstraction has 48888 states and 177972 transitions. [2021-06-05 05:39:49,993 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:39:49,993 INFO L276 IsEmpty]: Start isEmpty. Operand 48888 states and 177972 transitions. [2021-06-05 05:39:50,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 05:39:50,456 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:39:50,456 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:39:50,668 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2021-06-05 05:39:50,669 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:39:50,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:39:50,669 INFO L82 PathProgramCache]: Analyzing trace with hash 982042531, now seen corresponding path program 56 times [2021-06-05 05:39:50,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:39:50,669 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884704991] [2021-06-05 05:39:50,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:39:50,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:39:50,749 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:39:50,749 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:39:50,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884704991] [2021-06-05 05:39:50,749 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884704991] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:39:50,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [861234460] [2021-06-05 05:39:50,749 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 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:39:50,772 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:39:50,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:39:50,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 05:39:50,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:39:50,885 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:39:50,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [861234460] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:39:50,886 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:39:50,886 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 05:39:50,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460204554] [2021-06-05 05:39:50,886 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 05:39:50,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:39:50,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 05:39:50,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-06-05 05:39:50,886 INFO L87 Difference]: Start difference. First operand 48888 states and 177972 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:39:51,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:39:51,260 INFO L93 Difference]: Finished difference Result 50065 states and 181714 transitions. [2021-06-05 05:39:51,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 05:39:51,265 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 05:39:51,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:39:51,391 INFO L225 Difference]: With dead ends: 50065 [2021-06-05 05:39:51,391 INFO L226 Difference]: Without dead ends: 49947 [2021-06-05 05:39:51,391 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 149.5ms TimeCoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2021-06-05 05:39:51,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49947 states. [2021-06-05 05:39:52,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49947 to 49035. [2021-06-05 05:39:52,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49035 states, 49034 states have (on average 3.640331198760044) internal successors, (178500), 49034 states have internal predecessors, (178500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:39:52,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49035 states to 49035 states and 178500 transitions. [2021-06-05 05:39:52,483 INFO L78 Accepts]: Start accepts. Automaton has 49035 states and 178500 transitions. Word has length 25 [2021-06-05 05:39:52,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:39:52,483 INFO L482 AbstractCegarLoop]: Abstraction has 49035 states and 178500 transitions. [2021-06-05 05:39:52,483 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:39:52,483 INFO L276 IsEmpty]: Start isEmpty. Operand 49035 states and 178500 transitions. [2021-06-05 05:39:52,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 05:39:52,541 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:39:52,541 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:39:52,741 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:39:52,742 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:39:52,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:39:52,742 INFO L82 PathProgramCache]: Analyzing trace with hash 1430300891, now seen corresponding path program 57 times [2021-06-05 05:39:52,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:39:52,742 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565815021] [2021-06-05 05:39:52,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:39:52,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:39:52,817 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:39:52,817 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:39:52,817 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565815021] [2021-06-05 05:39:52,817 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565815021] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:39:52,817 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1317608369] [2021-06-05 05:39:52,817 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 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:39:52,839 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:39:52,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:39:52,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 05:39:52,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:39:52,952 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:39:52,953 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1317608369] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:39:52,953 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:39:52,953 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 05:39:52,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217545479] [2021-06-05 05:39:52,953 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 05:39:52,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:39:52,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 05:39:52,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-06-05 05:39:52,953 INFO L87 Difference]: Start difference. First operand 49035 states and 178500 transitions. Second operand has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:39:53,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:39:53,422 INFO L93 Difference]: Finished difference Result 49758 states and 180665 transitions. [2021-06-05 05:39:53,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 05:39:53,423 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 05:39:53,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:39:53,539 INFO L225 Difference]: With dead ends: 49758 [2021-06-05 05:39:53,539 INFO L226 Difference]: Without dead ends: 49695 [2021-06-05 05:39:53,539 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 154.2ms TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-06-05 05:39:53,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49695 states. [2021-06-05 05:39:54,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49695 to 49053. [2021-06-05 05:39:54,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49053 states, 49052 states have (on average 3.640218543586398) internal successors, (178560), 49052 states have internal predecessors, (178560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:39:54,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49053 states to 49053 states and 178560 transitions. [2021-06-05 05:39:54,663 INFO L78 Accepts]: Start accepts. Automaton has 49053 states and 178560 transitions. Word has length 25 [2021-06-05 05:39:54,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:39:54,663 INFO L482 AbstractCegarLoop]: Abstraction has 49053 states and 178560 transitions. [2021-06-05 05:39:54,663 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:39:54,663 INFO L276 IsEmpty]: Start isEmpty. Operand 49053 states and 178560 transitions. [2021-06-05 05:39:54,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 05:39:54,722 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:39:54,722 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:39:54,923 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable150 [2021-06-05 05:39:54,924 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:39:54,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:39:54,924 INFO L82 PathProgramCache]: Analyzing trace with hash 515219403, now seen corresponding path program 58 times [2021-06-05 05:39:54,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:39:54,924 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022778665] [2021-06-05 05:39:54,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:39:54,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:39:54,988 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:39:54,989 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:39:54,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022778665] [2021-06-05 05:39:54,989 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022778665] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:39:54,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131758089] [2021-06-05 05:39:54,989 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:39:55,010 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:39:55,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:39:55,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 05:39:55,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:39:55,128 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:39:55,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [131758089] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:39:55,128 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:39:55,128 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 05:39:55,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999396415] [2021-06-05 05:39:55,128 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 05:39:55,128 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:39:55,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 05:39:55,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-06-05 05:39:55,129 INFO L87 Difference]: Start difference. First operand 49053 states and 178560 transitions. Second operand has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:39:55,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:39:55,985 INFO L93 Difference]: Finished difference Result 50900 states and 184438 transitions. [2021-06-05 05:39:55,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 05:39:55,986 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 05:39:55,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:39:56,099 INFO L225 Difference]: With dead ends: 50900 [2021-06-05 05:39:56,099 INFO L226 Difference]: Without dead ends: 50875 [2021-06-05 05:39:56,099 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 193.7ms TimeCoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:39:56,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50875 states. [2021-06-05 05:39:56,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50875 to 49168. [2021-06-05 05:39:56,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49168 states, 49167 states have (on average 3.642280391319381) internal successors, (179080), 49167 states have internal predecessors, (179080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:39:57,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49168 states to 49168 states and 179080 transitions. [2021-06-05 05:39:57,344 INFO L78 Accepts]: Start accepts. Automaton has 49168 states and 179080 transitions. Word has length 25 [2021-06-05 05:39:57,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:39:57,356 INFO L482 AbstractCegarLoop]: Abstraction has 49168 states and 179080 transitions. [2021-06-05 05:39:57,356 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:39:57,356 INFO L276 IsEmpty]: Start isEmpty. Operand 49168 states and 179080 transitions. [2021-06-05 05:39:57,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 05:39:57,425 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:39:57,425 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:39:57,626 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable153 [2021-06-05 05:39:57,626 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:39:57,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:39:57,626 INFO L82 PathProgramCache]: Analyzing trace with hash -434468137, now seen corresponding path program 59 times [2021-06-05 05:39:57,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:39:57,626 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651398954] [2021-06-05 05:39:57,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:39:57,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:39:57,655 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:39:57,655 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:39:57,655 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651398954] [2021-06-05 05:39:57,655 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651398954] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:39:57,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582962734] [2021-06-05 05:39:57,656 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 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:39:57,678 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:39:57,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:39:57,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 05:39:57,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:39:57,751 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:39:57,752 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [582962734] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:39:57,752 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:39:57,752 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 11 [2021-06-05 05:39:57,752 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399829293] [2021-06-05 05:39:57,752 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 05:39:57,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:39:57,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 05:39:57,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-06-05 05:39:57,752 INFO L87 Difference]: Start difference. First operand 49168 states and 179080 transitions. Second operand has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:39:58,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:39:58,265 INFO L93 Difference]: Finished difference Result 92519 states and 337531 transitions. [2021-06-05 05:39:58,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 05:39:58,265 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 05:39:58,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:39:58,513 INFO L225 Difference]: With dead ends: 92519 [2021-06-05 05:39:58,513 INFO L226 Difference]: Without dead ends: 92495 [2021-06-05 05:39:58,513 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 92.8ms TimeCoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-06-05 05:39:58,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92495 states. [2021-06-05 05:40:00,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92495 to 90624. [2021-06-05 05:40:00,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90624 states, 90623 states have (on average 3.6490736347284907) internal successors, (330690), 90623 states have internal predecessors, (330690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:40:01,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90624 states to 90624 states and 330690 transitions. [2021-06-05 05:40:01,112 INFO L78 Accepts]: Start accepts. Automaton has 90624 states and 330690 transitions. Word has length 25 [2021-06-05 05:40:01,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:40:01,112 INFO L482 AbstractCegarLoop]: Abstraction has 90624 states and 330690 transitions. [2021-06-05 05:40:01,112 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:40:01,112 INFO L276 IsEmpty]: Start isEmpty. Operand 90624 states and 330690 transitions. [2021-06-05 05:40:01,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 05:40:01,228 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:40:01,228 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:40:01,429 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2021-06-05 05:40:01,429 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:40:01,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:40:01,429 INFO L82 PathProgramCache]: Analyzing trace with hash 1866838691, now seen corresponding path program 60 times [2021-06-05 05:40:01,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:40:01,430 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520043512] [2021-06-05 05:40:01,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:40:01,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:40:01,462 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:40:01,463 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:40:01,463 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520043512] [2021-06-05 05:40:01,463 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520043512] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:40:01,463 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [769811655] [2021-06-05 05:40:01,463 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 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:40:01,491 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:40:01,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:40:01,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 05:40:01,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:40:01,577 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:40:01,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [769811655] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:40:01,578 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:40:01,578 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 12 [2021-06-05 05:40:01,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522536847] [2021-06-05 05:40:01,578 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 05:40:01,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:40:01,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 05:40:01,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-06-05 05:40:01,579 INFO L87 Difference]: Start difference. First operand 90624 states and 330690 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:40:02,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:40:02,400 INFO L93 Difference]: Finished difference Result 137171 states and 502327 transitions. [2021-06-05 05:40:02,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 05:40:02,401 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 05:40:02,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:40:03,337 INFO L225 Difference]: With dead ends: 137171 [2021-06-05 05:40:03,337 INFO L226 Difference]: Without dead ends: 137155 [2021-06-05 05:40:03,337 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 144.1ms TimeCoverageRelationStatistics Valid=119, Invalid=261, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:40:03,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137155 states. [2021-06-05 05:40:05,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137155 to 75753. [2021-06-05 05:40:05,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75753 states, 75752 states have (on average 3.641699229063259) internal successors, (275866), 75752 states have internal predecessors, (275866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:40:05,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75753 states to 75753 states and 275866 transitions. [2021-06-05 05:40:05,544 INFO L78 Accepts]: Start accepts. Automaton has 75753 states and 275866 transitions. Word has length 25 [2021-06-05 05:40:05,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:40:05,544 INFO L482 AbstractCegarLoop]: Abstraction has 75753 states and 275866 transitions. [2021-06-05 05:40:05,544 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:40:05,544 INFO L276 IsEmpty]: Start isEmpty. Operand 75753 states and 275866 transitions. [2021-06-05 05:40:05,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 05:40:05,664 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:40:05,664 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:40:05,864 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:40:05,864 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:40:05,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:40:05,865 INFO L82 PathProgramCache]: Analyzing trace with hash 2025324127, now seen corresponding path program 61 times [2021-06-05 05:40:05,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:40:05,865 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073316164] [2021-06-05 05:40:05,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:40:05,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:40:05,958 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:40:05,958 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:40:05,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073316164] [2021-06-05 05:40:05,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073316164] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:40:05,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [753576639] [2021-06-05 05:40:05,958 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 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:40:05,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:40:05,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 05:40:05,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:40:06,085 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:40:06,085 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [753576639] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:40:06,086 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:40:06,086 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 05:40:06,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905950449] [2021-06-05 05:40:06,087 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 05:40:06,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:40:06,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 05:40:06,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-06-05 05:40:06,088 INFO L87 Difference]: Start difference. First operand 75753 states and 275866 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:40:07,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:40:07,247 INFO L93 Difference]: Finished difference Result 76022 states and 276650 transitions. [2021-06-05 05:40:07,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 05:40:07,247 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 05:40:07,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:40:07,467 INFO L225 Difference]: With dead ends: 76022 [2021-06-05 05:40:07,467 INFO L226 Difference]: Without dead ends: 75973 [2021-06-05 05:40:07,467 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 151.3ms TimeCoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-06-05 05:40:07,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75973 states. [2021-06-05 05:40:08,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75973 to 75785. [2021-06-05 05:40:09,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75785 states, 75784 states have (on average 3.6417317639607303) internal successors, (275985), 75784 states have internal predecessors, (275985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:40:09,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75785 states to 75785 states and 275985 transitions. [2021-06-05 05:40:09,291 INFO L78 Accepts]: Start accepts. Automaton has 75785 states and 275985 transitions. Word has length 25 [2021-06-05 05:40:09,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:40:09,291 INFO L482 AbstractCegarLoop]: Abstraction has 75785 states and 275985 transitions. [2021-06-05 05:40:09,291 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:40:09,291 INFO L276 IsEmpty]: Start isEmpty. Operand 75785 states and 275985 transitions. [2021-06-05 05:40:09,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 05:40:09,402 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:40:09,402 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:40:09,602 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:40:09,602 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:40:09,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:40:09,603 INFO L82 PathProgramCache]: Analyzing trace with hash 1144885067, now seen corresponding path program 62 times [2021-06-05 05:40:09,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:40:09,603 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187561155] [2021-06-05 05:40:09,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:40:09,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:40:09,668 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:40:09,668 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:40:09,668 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187561155] [2021-06-05 05:40:09,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187561155] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:40:09,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [447920592] [2021-06-05 05:40:09,669 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 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:40:09,693 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:40:09,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:40:09,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 05:40:09,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:40:09,771 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:40:09,772 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [447920592] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:40:09,772 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:40:09,772 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 05:40:09,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732393812] [2021-06-05 05:40:09,772 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 05:40:09,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:40:09,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 05:40:09,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-06-05 05:40:09,772 INFO L87 Difference]: Start difference. First operand 75785 states and 275985 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:40:10,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:40:10,683 INFO L93 Difference]: Finished difference Result 76818 states and 279184 transitions. [2021-06-05 05:40:10,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 05:40:10,683 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 05:40:10,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:40:10,887 INFO L225 Difference]: With dead ends: 76818 [2021-06-05 05:40:10,887 INFO L226 Difference]: Without dead ends: 76793 [2021-06-05 05:40:10,887 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 121.4ms TimeCoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-06-05 05:40:10,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76793 states. [2021-06-05 05:40:12,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76793 to 75828. [2021-06-05 05:40:12,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75828 states, 75827 states have (on average 3.6418821791710076) internal successors, (276153), 75827 states have internal predecessors, (276153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:40:12,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75828 states to 75828 states and 276153 transitions. [2021-06-05 05:40:12,571 INFO L78 Accepts]: Start accepts. Automaton has 75828 states and 276153 transitions. Word has length 25 [2021-06-05 05:40:12,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:40:12,571 INFO L482 AbstractCegarLoop]: Abstraction has 75828 states and 276153 transitions. [2021-06-05 05:40:12,571 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:40:12,572 INFO L276 IsEmpty]: Start isEmpty. Operand 75828 states and 276153 transitions. [2021-06-05 05:40:12,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 05:40:12,681 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:40:12,681 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:40:12,884 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:40:12,885 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:40:12,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:40:12,885 INFO L82 PathProgramCache]: Analyzing trace with hash -1821384809, now seen corresponding path program 63 times [2021-06-05 05:40:12,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:40:12,885 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502273500] [2021-06-05 05:40:12,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:40:12,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:40:12,954 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:40:12,954 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:40:12,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502273500] [2021-06-05 05:40:12,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502273500] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:40:12,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [965362730] [2021-06-05 05:40:12,954 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 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:40:12,977 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:40:12,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:40:12,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 05:40:12,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:40:13,095 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:40:13,095 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [965362730] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:40:13,095 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:40:13,095 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 05:40:13,096 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204725425] [2021-06-05 05:40:13,096 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 05:40:13,096 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:40:13,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 05:40:13,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-06-05 05:40:13,096 INFO L87 Difference]: Start difference. First operand 75828 states and 276153 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:40:14,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:40:14,126 INFO L93 Difference]: Finished difference Result 76411 states and 277746 transitions. [2021-06-05 05:40:14,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 05:40:14,126 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 05:40:14,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:40:14,332 INFO L225 Difference]: With dead ends: 76411 [2021-06-05 05:40:14,332 INFO L226 Difference]: Without dead ends: 76386 [2021-06-05 05:40:14,332 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 155.8ms TimeCoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-05 05:40:14,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76386 states. [2021-06-05 05:40:15,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76386 to 75829. [2021-06-05 05:40:15,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75829 states, 75828 states have (on average 3.641966028380018) internal successors, (276163), 75828 states have internal predecessors, (276163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:40:16,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75829 states to 75829 states and 276163 transitions. [2021-06-05 05:40:16,066 INFO L78 Accepts]: Start accepts. Automaton has 75829 states and 276163 transitions. Word has length 25 [2021-06-05 05:40:16,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:40:16,066 INFO L482 AbstractCegarLoop]: Abstraction has 75829 states and 276163 transitions. [2021-06-05 05:40:16,066 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:40:16,066 INFO L276 IsEmpty]: Start isEmpty. Operand 75829 states and 276163 transitions. [2021-06-05 05:40:16,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 05:40:16,167 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:40:16,167 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:40:16,368 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,110 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:40:16,368 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:40:16,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:40:16,369 INFO L82 PathProgramCache]: Analyzing trace with hash -484157037, now seen corresponding path program 64 times [2021-06-05 05:40:16,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:40:16,369 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4671174] [2021-06-05 05:40:16,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:40:16,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:40:16,402 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:40:16,402 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:40:16,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4671174] [2021-06-05 05:40:16,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4671174] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:40:16,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [637111481] [2021-06-05 05:40:16,402 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 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:40:16,425 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:40:16,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:40:16,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 05:40:16,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:40:16,490 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:40:16,490 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [637111481] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:40:16,490 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:40:16,490 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 10 [2021-06-05 05:40:16,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900142475] [2021-06-05 05:40:16,491 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 05:40:16,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:40:16,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 05:40:16,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-06-05 05:40:16,491 INFO L87 Difference]: Start difference. First operand 75829 states and 276163 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:40:17,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:40:17,499 INFO L93 Difference]: Finished difference Result 81206 states and 294898 transitions. [2021-06-05 05:40:17,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 05:40:17,499 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 05:40:17,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:40:17,701 INFO L225 Difference]: With dead ends: 81206 [2021-06-05 05:40:17,701 INFO L226 Difference]: Without dead ends: 81196 [2021-06-05 05:40:17,701 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 83.2ms TimeCoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-06-05 05:40:17,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81196 states. [2021-06-05 05:40:19,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81196 to 77254. [2021-06-05 05:40:19,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77254 states, 77253 states have (on average 3.640311703105381) internal successors, (281225), 77253 states have internal predecessors, (281225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:40:19,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77254 states to 77254 states and 281225 transitions. [2021-06-05 05:40:19,398 INFO L78 Accepts]: Start accepts. Automaton has 77254 states and 281225 transitions. Word has length 25 [2021-06-05 05:40:19,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:40:19,398 INFO L482 AbstractCegarLoop]: Abstraction has 77254 states and 281225 transitions. [2021-06-05 05:40:19,398 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:40:19,399 INFO L276 IsEmpty]: Start isEmpty. Operand 77254 states and 281225 transitions. [2021-06-05 05:40:19,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 05:40:19,509 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:40:19,509 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:40:19,712 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable167 [2021-06-05 05:40:19,713 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:40:19,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:40:19,713 INFO L82 PathProgramCache]: Analyzing trace with hash 697625119, now seen corresponding path program 65 times [2021-06-05 05:40:19,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:40:19,713 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444615964] [2021-06-05 05:40:19,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:40:19,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:40:19,787 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:40:19,787 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:40:19,787 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444615964] [2021-06-05 05:40:19,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444615964] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:40:19,788 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1221072060] [2021-06-05 05:40:19,788 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 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:40:19,811 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 05:40:19,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:40:19,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 05:40:19,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:40:19,888 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:40:19,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1221072060] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:40:19,888 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:40:19,888 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 05:40:19,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145741129] [2021-06-05 05:40:19,888 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 05:40:19,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:40:19,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 05:40:19,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-06-05 05:40:19,889 INFO L87 Difference]: Start difference. First operand 77254 states and 281225 transitions. Second operand has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:40:20,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:40:20,810 INFO L93 Difference]: Finished difference Result 77680 states and 282481 transitions. [2021-06-05 05:40:20,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 05:40:20,825 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 25 [2021-06-05 05:40:20,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:40:21,079 INFO L225 Difference]: With dead ends: 77680 [2021-06-05 05:40:21,079 INFO L226 Difference]: Without dead ends: 77600 [2021-06-05 05:40:21,079 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 138.6ms TimeCoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-06-05 05:40:21,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77600 states. [2021-06-05 05:40:22,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77600 to 77302. [2021-06-05 05:40:22,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77302 states, 77301 states have (on average 3.6403280682009287) internal successors, (281401), 77301 states have internal predecessors, (281401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:40:22,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77302 states to 77302 states and 281401 transitions. [2021-06-05 05:40:22,753 INFO L78 Accepts]: Start accepts. Automaton has 77302 states and 281401 transitions. Word has length 25 [2021-06-05 05:40:22,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:40:22,753 INFO L482 AbstractCegarLoop]: Abstraction has 77302 states and 281401 transitions. [2021-06-05 05:40:22,753 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:40:22,753 INFO L276 IsEmpty]: Start isEmpty. Operand 77302 states and 281401 transitions. [2021-06-05 05:40:22,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 05:40:22,858 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:40:22,858 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:40:23,060 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable170 [2021-06-05 05:40:23,061 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:40:23,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:40:23,061 INFO L82 PathProgramCache]: Analyzing trace with hash -182813941, now seen corresponding path program 66 times [2021-06-05 05:40:23,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:40:23,061 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008113859] [2021-06-05 05:40:23,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:40:23,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:40:23,142 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:40:23,142 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:40:23,142 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008113859] [2021-06-05 05:40:23,142 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008113859] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:40:23,142 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [874034099] [2021-06-05 05:40:23,142 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 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:40:23,172 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:40:23,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:40:23,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 05:40:23,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:40:23,254 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:40:23,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [874034099] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:40:23,255 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:40:23,255 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 05:40:23,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280901015] [2021-06-05 05:40:23,255 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 05:40:23,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:40:23,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 05:40:23,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-06-05 05:40:23,256 INFO L87 Difference]: Start difference. First operand 77302 states and 281401 transitions. Second operand has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:40:23,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:40:23,764 INFO L93 Difference]: Finished difference Result 78459 states and 284976 transitions. [2021-06-05 05:40:23,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 05:40:23,764 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 25 [2021-06-05 05:40:23,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:40:24,500 INFO L225 Difference]: With dead ends: 78459 [2021-06-05 05:40:24,501 INFO L226 Difference]: Without dead ends: 78434 [2021-06-05 05:40:24,501 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 140.7ms TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-06-05 05:40:24,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78434 states. [2021-06-05 05:40:25,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78434 to 77307. [2021-06-05 05:40:25,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77307 states, 77306 states have (on average 3.640351331073914) internal successors, (281421), 77306 states have internal predecessors, (281421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:40:26,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77307 states to 77307 states and 281421 transitions. [2021-06-05 05:40:26,144 INFO L78 Accepts]: Start accepts. Automaton has 77307 states and 281421 transitions. Word has length 25 [2021-06-05 05:40:26,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:40:26,144 INFO L482 AbstractCegarLoop]: Abstraction has 77307 states and 281421 transitions. [2021-06-05 05:40:26,144 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:40:26,144 INFO L276 IsEmpty]: Start isEmpty. Operand 77307 states and 281421 transitions. [2021-06-05 05:40:26,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 05:40:26,259 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:40:26,259 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:40:26,459 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:40:26,460 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:40:26,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:40:26,460 INFO L82 PathProgramCache]: Analyzing trace with hash -780291045, now seen corresponding path program 67 times [2021-06-05 05:40:26,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:40:26,460 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324188852] [2021-06-05 05:40:26,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:40:26,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:40:26,550 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:40:26,550 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:40:26,550 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324188852] [2021-06-05 05:40:26,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324188852] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:40:26,550 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [342244409] [2021-06-05 05:40:26,550 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 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:40:26,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:40:26,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 05:40:26,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:40:26,673 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:40:26,674 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [342244409] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:40:26,674 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:40:26,674 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 05:40:26,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675271536] [2021-06-05 05:40:26,674 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 05:40:26,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:40:26,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 05:40:26,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-06-05 05:40:26,675 INFO L87 Difference]: Start difference. First operand 77307 states and 281421 transitions. Second operand has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:40:27,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:40:27,176 INFO L93 Difference]: Finished difference Result 77563 states and 282160 transitions. [2021-06-05 05:40:27,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 05:40:27,183 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 25 [2021-06-05 05:40:27,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:40:27,457 INFO L225 Difference]: With dead ends: 77563 [2021-06-05 05:40:27,458 INFO L226 Difference]: Without dead ends: 77530 [2021-06-05 05:40:27,458 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 138.6ms TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-06-05 05:40:28,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77530 states. [2021-06-05 05:40:29,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77530 to 77315. [2021-06-05 05:40:29,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77315 states, 77314 states have (on average 3.640336808340016) internal successors, (281449), 77314 states have internal predecessors, (281449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:40:29,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77315 states to 77315 states and 281449 transitions. [2021-06-05 05:40:29,727 INFO L78 Accepts]: Start accepts. Automaton has 77315 states and 281449 transitions. Word has length 25 [2021-06-05 05:40:29,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:40:29,727 INFO L482 AbstractCegarLoop]: Abstraction has 77315 states and 281449 transitions. [2021-06-05 05:40:29,727 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:40:29,727 INFO L276 IsEmpty]: Start isEmpty. Operand 77315 states and 281449 transitions. [2021-06-05 05:40:29,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 05:40:29,833 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:40:29,833 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:40:30,034 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable172 [2021-06-05 05:40:30,034 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:40:30,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:40:30,034 INFO L82 PathProgramCache]: Analyzing trace with hash -1817699061, now seen corresponding path program 68 times [2021-06-05 05:40:30,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:40:30,034 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556213074] [2021-06-05 05:40:30,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:40:30,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:40:30,123 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:40:30,124 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:40:30,124 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556213074] [2021-06-05 05:40:30,124 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556213074] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:40:30,124 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239254209] [2021-06-05 05:40:30,124 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 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:40:30,146 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:40:30,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:40:30,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 05:40:30,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:40:30,248 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:40:30,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1239254209] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:40:30,249 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:40:30,249 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 05:40:30,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965647841] [2021-06-05 05:40:30,249 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 05:40:30,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:40:30,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 05:40:30,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-06-05 05:40:30,249 INFO L87 Difference]: Start difference. First operand 77315 states and 281449 transitions. Second operand has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:40:30,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:40:30,774 INFO L93 Difference]: Finished difference Result 77659 states and 282390 transitions. [2021-06-05 05:40:30,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 05:40:30,775 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 05:40:30,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:40:30,966 INFO L225 Difference]: With dead ends: 77659 [2021-06-05 05:40:30,966 INFO L226 Difference]: Without dead ends: 77589 [2021-06-05 05:40:30,967 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 154.4ms TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-06-05 05:40:31,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77589 states. [2021-06-05 05:40:32,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77589 to 77279. [2021-06-05 05:40:32,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77279 states, 77278 states have (on average 3.63971634876679) internal successors, (281270), 77278 states have internal predecessors, (281270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:40:33,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77279 states to 77279 states and 281270 transitions. [2021-06-05 05:40:33,007 INFO L78 Accepts]: Start accepts. Automaton has 77279 states and 281270 transitions. Word has length 25 [2021-06-05 05:40:33,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:40:33,007 INFO L482 AbstractCegarLoop]: Abstraction has 77279 states and 281270 transitions. [2021-06-05 05:40:33,007 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:40:33,007 INFO L276 IsEmpty]: Start isEmpty. Operand 77279 states and 281270 transitions. [2021-06-05 05:40:33,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 05:40:33,122 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:40:33,123 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:40:33,323 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:40:33,323 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:40:33,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:40:33,323 INFO L82 PathProgramCache]: Analyzing trace with hash -376478069, now seen corresponding path program 69 times [2021-06-05 05:40:33,323 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:40:33,324 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586871405] [2021-06-05 05:40:33,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:40:33,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:40:33,428 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:40:33,428 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:40:33,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586871405] [2021-06-05 05:40:33,428 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [586871405] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:40:33,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1602217836] [2021-06-05 05:40:33,428 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 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:40:33,452 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 05:40:33,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:40:33,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 05:40:33,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:40:33,570 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:40:33,570 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1602217836] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:40:33,570 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:40:33,570 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 05:40:33,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65316661] [2021-06-05 05:40:33,570 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 05:40:33,570 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:40:33,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 05:40:33,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-06-05 05:40:33,571 INFO L87 Difference]: Start difference. First operand 77279 states and 281270 transitions. Second operand has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:40:34,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:40:34,236 INFO L93 Difference]: Finished difference Result 78113 states and 283706 transitions. [2021-06-05 05:40:34,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 05:40:34,237 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 05:40:34,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:40:34,932 INFO L225 Difference]: With dead ends: 78113 [2021-06-05 05:40:34,932 INFO L226 Difference]: Without dead ends: 78039 [2021-06-05 05:40:34,932 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 216.9ms TimeCoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:40:35,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78039 states. [2021-06-05 05:40:36,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78039 to 77471. [2021-06-05 05:40:36,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77471 states, 77470 states have (on average 3.638763392280883) internal successors, (281895), 77470 states have internal predecessors, (281895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:40:36,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77471 states to 77471 states and 281895 transitions. [2021-06-05 05:40:36,602 INFO L78 Accepts]: Start accepts. Automaton has 77471 states and 281895 transitions. Word has length 25 [2021-06-05 05:40:36,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:40:36,602 INFO L482 AbstractCegarLoop]: Abstraction has 77471 states and 281895 transitions. [2021-06-05 05:40:36,602 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:40:36,602 INFO L276 IsEmpty]: Start isEmpty. Operand 77471 states and 281895 transitions. [2021-06-05 05:40:36,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 05:40:36,711 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:40:36,711 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:40:36,911 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,116 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:40:36,912 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:40:36,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:40:36,912 INFO L82 PathProgramCache]: Analyzing trace with hash -181794737, now seen corresponding path program 70 times [2021-06-05 05:40:36,912 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:40:36,912 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628511265] [2021-06-05 05:40:36,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:40:36,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:40:37,074 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:40:37,074 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:40:37,074 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628511265] [2021-06-05 05:40:37,075 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628511265] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:40:37,075 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [207565638] [2021-06-05 05:40:37,075 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 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:40:37,109 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:40:37,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:40:37,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:40:37,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:40:37,238 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:40:37,238 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [207565638] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:40:37,238 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:40:37,238 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 05:40:37,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796442588] [2021-06-05 05:40:37,239 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 05:40:37,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:40:37,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 05:40:37,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-06-05 05:40:37,239 INFO L87 Difference]: Start difference. First operand 77471 states and 281895 transitions. Second operand has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:40:38,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:40:38,034 INFO L93 Difference]: Finished difference Result 77694 states and 282349 transitions. [2021-06-05 05:40:38,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 05:40:38,035 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 05:40:38,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:40:38,658 INFO L225 Difference]: With dead ends: 77694 [2021-06-05 05:40:38,658 INFO L226 Difference]: Without dead ends: 77515 [2021-06-05 05:40:38,658 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 268.4ms TimeCoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:40:38,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77515 states. [2021-06-05 05:40:39,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77515 to 77439. [2021-06-05 05:40:40,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77439 states, 77438 states have (on average 3.6384075001937033) internal successors, (281751), 77438 states have internal predecessors, (281751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:40:40,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77439 states to 77439 states and 281751 transitions. [2021-06-05 05:40:40,260 INFO L78 Accepts]: Start accepts. Automaton has 77439 states and 281751 transitions. Word has length 25 [2021-06-05 05:40:40,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:40:40,260 INFO L482 AbstractCegarLoop]: Abstraction has 77439 states and 281751 transitions. [2021-06-05 05:40:40,260 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:40:40,261 INFO L276 IsEmpty]: Start isEmpty. Operand 77439 states and 281751 transitions. [2021-06-05 05:40:40,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 05:40:40,363 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:40:40,363 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:40:40,563 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:40:40,563 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:40:40,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:40:40,564 INFO L82 PathProgramCache]: Analyzing trace with hash 1465003531, now seen corresponding path program 71 times [2021-06-05 05:40:40,564 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:40:40,564 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348268314] [2021-06-05 05:40:40,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:40:40,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:40:40,661 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:40:40,661 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:40:40,661 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348268314] [2021-06-05 05:40:40,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348268314] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:40:40,661 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [120818350] [2021-06-05 05:40:40,661 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 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:40:40,691 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:40:40,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:40:40,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 05:40:40,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:40:40,804 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:40:40,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [120818350] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:40:40,805 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:40:40,805 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 05:40:40,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337057186] [2021-06-05 05:40:40,805 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 05:40:40,805 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:40:40,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 05:40:40,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-06-05 05:40:40,806 INFO L87 Difference]: Start difference. First operand 77439 states and 281751 transitions. Second operand has 16 states, 16 states have (on average 2.5) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:40:42,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:40:42,047 INFO L93 Difference]: Finished difference Result 79339 states and 287695 transitions. [2021-06-05 05:40:42,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 05:40:42,048 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 05:40:42,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:40:42,344 INFO L225 Difference]: With dead ends: 79339 [2021-06-05 05:40:42,344 INFO L226 Difference]: Without dead ends: 79274 [2021-06-05 05:40:42,345 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 302.9ms TimeCoverageRelationStatistics Valid=115, Invalid=535, Unknown=0, NotChecked=0, Total=650 [2021-06-05 05:40:42,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79274 states. [2021-06-05 05:40:43,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79274 to 77568. [2021-06-05 05:40:43,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77568 states, 77567 states have (on average 3.638802583572911) internal successors, (282251), 77567 states have internal predecessors, (282251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:40:44,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77568 states to 77568 states and 282251 transitions. [2021-06-05 05:40:44,043 INFO L78 Accepts]: Start accepts. Automaton has 77568 states and 282251 transitions. Word has length 25 [2021-06-05 05:40:44,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:40:44,043 INFO L482 AbstractCegarLoop]: Abstraction has 77568 states and 282251 transitions. [2021-06-05 05:40:44,043 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:40:44,044 INFO L276 IsEmpty]: Start isEmpty. Operand 77568 states and 282251 transitions. [2021-06-05 05:40:44,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 05:40:44,146 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:40:44,146 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:40:44,347 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:40:44,347 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:40:44,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:40:44,347 INFO L82 PathProgramCache]: Analyzing trace with hash 53335819, now seen corresponding path program 72 times [2021-06-05 05:40:44,347 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:40:44,347 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154803380] [2021-06-05 05:40:44,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:40:44,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:40:44,463 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:40:44,463 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:40:44,463 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154803380] [2021-06-05 05:40:44,463 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154803380] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:40:44,463 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1493865772] [2021-06-05 05:40:44,463 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 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:40:44,490 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:40:44,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:40:44,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 05:40:44,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:40:44,622 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:40:44,623 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1493865772] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:40:44,623 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:40:44,623 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 05:40:44,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139463303] [2021-06-05 05:40:44,623 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:40:44,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:40:44,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:40:44,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:40:44,623 INFO L87 Difference]: Start difference. First operand 77568 states and 282251 transitions. Second operand has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:40:45,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:40:45,779 INFO L93 Difference]: Finished difference Result 94772 states and 343263 transitions. [2021-06-05 05:40:45,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 05:40:45,779 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 05:40:45,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:40:46,136 INFO L225 Difference]: With dead ends: 94772 [2021-06-05 05:40:46,136 INFO L226 Difference]: Without dead ends: 94731 [2021-06-05 05:40:46,137 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 268.5ms TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:40:46,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94731 states. [2021-06-05 05:40:47,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94731 to 77763. [2021-06-05 05:40:47,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77763 states, 77762 states have (on average 3.638486664437643) internal successors, (282936), 77762 states have internal predecessors, (282936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:40:47,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77763 states to 77763 states and 282936 transitions. [2021-06-05 05:40:47,979 INFO L78 Accepts]: Start accepts. Automaton has 77763 states and 282936 transitions. Word has length 25 [2021-06-05 05:40:47,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:40:47,979 INFO L482 AbstractCegarLoop]: Abstraction has 77763 states and 282936 transitions. [2021-06-05 05:40:47,980 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:40:47,980 INFO L276 IsEmpty]: Start isEmpty. Operand 77763 states and 282936 transitions. [2021-06-05 05:40:48,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 05:40:48,084 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:40:48,084 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:40:48,286 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable178 [2021-06-05 05:40:48,286 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:40:48,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:40:48,286 INFO L82 PathProgramCache]: Analyzing trace with hash 1031893263, now seen corresponding path program 73 times [2021-06-05 05:40:48,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:40:48,286 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591721544] [2021-06-05 05:40:48,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:40:48,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:40:48,401 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:40:48,401 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:40:48,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591721544] [2021-06-05 05:40:48,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1591721544] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:40:48,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [165278014] [2021-06-05 05:40:48,402 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 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:40:48,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:40:48,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 05:40:48,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:40:48,567 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:40:48,568 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [165278014] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:40:48,568 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:40:48,568 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 05:40:48,568 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476680730] [2021-06-05 05:40:48,568 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 05:40:48,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:40:48,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 05:40:48,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:40:48,568 INFO L87 Difference]: Start difference. First operand 77763 states and 282936 transitions. Second operand has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:40:49,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:40:49,798 INFO L93 Difference]: Finished difference Result 94989 states and 343844 transitions. [2021-06-05 05:40:49,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 05:40:49,798 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 05:40:49,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:40:50,032 INFO L225 Difference]: With dead ends: 94989 [2021-06-05 05:40:50,033 INFO L226 Difference]: Without dead ends: 94948 [2021-06-05 05:40:50,033 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 353.0ms TimeCoverageRelationStatistics Valid=140, Invalid=510, Unknown=0, NotChecked=0, Total=650 [2021-06-05 05:40:50,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94948 states. [2021-06-05 05:40:51,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94948 to 77792. [2021-06-05 05:40:51,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77792 states, 77791 states have (on average 3.638647144271188) internal successors, (283054), 77791 states have internal predecessors, (283054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:40:51,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77792 states to 77792 states and 283054 transitions. [2021-06-05 05:40:51,869 INFO L78 Accepts]: Start accepts. Automaton has 77792 states and 283054 transitions. Word has length 25 [2021-06-05 05:40:51,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:40:51,869 INFO L482 AbstractCegarLoop]: Abstraction has 77792 states and 283054 transitions. [2021-06-05 05:40:51,869 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:40:51,869 INFO L276 IsEmpty]: Start isEmpty. Operand 77792 states and 283054 transitions. [2021-06-05 05:40:52,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 05:40:52,365 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:40:52,365 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:40:52,587 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:40:52,588 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:40:52,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:40:52,588 INFO L82 PathProgramCache]: Analyzing trace with hash 232853259, now seen corresponding path program 74 times [2021-06-05 05:40:52,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:40:52,588 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854552843] [2021-06-05 05:40:52,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:40:52,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:40:52,702 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:40:52,703 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:40:52,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854552843] [2021-06-05 05:40:52,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854552843] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:40:52,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1954265931] [2021-06-05 05:40:52,703 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 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:40:52,724 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:40:52,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:40:52,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 05:40:52,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:40:52,886 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:40:52,886 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1954265931] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:40:52,886 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:40:52,886 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:40:52,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157518097] [2021-06-05 05:40:52,886 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:40:52,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:40:52,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:40:52,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:40:52,887 INFO L87 Difference]: Start difference. First operand 77792 states and 283054 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:40:54,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:40:54,199 INFO L93 Difference]: Finished difference Result 89830 states and 327389 transitions. [2021-06-05 05:40:54,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 05:40:54,200 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 05:40:54,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:40:54,427 INFO L225 Difference]: With dead ends: 89830 [2021-06-05 05:40:54,427 INFO L226 Difference]: Without dead ends: 89585 [2021-06-05 05:40:54,427 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 500 ImplicationChecksByTransitivity, 685.7ms TimeCoverageRelationStatistics Valid=384, Invalid=1422, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 05:40:54,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89585 states. [2021-06-05 05:40:56,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89585 to 77799. [2021-06-05 05:40:56,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77799 states, 77798 states have (on average 3.638962441193861) internal successors, (283104), 77798 states have internal predecessors, (283104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:40:56,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77799 states to 77799 states and 283104 transitions. [2021-06-05 05:40:56,538 INFO L78 Accepts]: Start accepts. Automaton has 77799 states and 283104 transitions. Word has length 25 [2021-06-05 05:40:56,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:40:56,538 INFO L482 AbstractCegarLoop]: Abstraction has 77799 states and 283104 transitions. [2021-06-05 05:40:56,538 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:40:56,538 INFO L276 IsEmpty]: Start isEmpty. Operand 77799 states and 283104 transitions. [2021-06-05 05:40:56,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 05:40:56,646 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:40:56,646 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:40:56,846 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:40:56,846 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:40:56,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:40:56,847 INFO L82 PathProgramCache]: Analyzing trace with hash 1883882647, now seen corresponding path program 75 times [2021-06-05 05:40:56,847 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:40:56,847 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522930763] [2021-06-05 05:40:56,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:40:56,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:40:56,948 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:40:56,948 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:40:56,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522930763] [2021-06-05 05:40:56,948 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522930763] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:40:56,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1490019524] [2021-06-05 05:40:56,948 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 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:40:56,972 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:40:56,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:40:56,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 05:40:56,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:40:57,109 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:40:57,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1490019524] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:40:57,109 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:40:57,109 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 05:40:57,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776728422] [2021-06-05 05:40:57,109 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 05:40:57,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:40:57,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 05:40:57,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2021-06-05 05:40:57,110 INFO L87 Difference]: Start difference. First operand 77799 states and 283104 transitions. Second operand has 16 states, 16 states have (on average 2.5) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:40:58,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:40:58,340 INFO L93 Difference]: Finished difference Result 94982 states and 344217 transitions. [2021-06-05 05:40:58,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 05:40:58,340 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 05:40:58,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:40:58,631 INFO L225 Difference]: With dead ends: 94982 [2021-06-05 05:40:58,632 INFO L226 Difference]: Without dead ends: 94949 [2021-06-05 05:40:58,632 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 325.7ms TimeCoverageRelationStatistics Valid=152, Invalid=448, Unknown=0, NotChecked=0, Total=600 [2021-06-05 05:40:58,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94949 states. [2021-06-05 05:40:59,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94949 to 77835. [2021-06-05 05:41:00,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77835 states, 77834 states have (on average 3.639579104247501) internal successors, (283283), 77834 states have internal predecessors, (283283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:41:00,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77835 states to 77835 states and 283283 transitions. [2021-06-05 05:41:00,297 INFO L78 Accepts]: Start accepts. Automaton has 77835 states and 283283 transitions. Word has length 25 [2021-06-05 05:41:00,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:41:00,298 INFO L482 AbstractCegarLoop]: Abstraction has 77835 states and 283283 transitions. [2021-06-05 05:41:00,298 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:41:00,298 INFO L276 IsEmpty]: Start isEmpty. Operand 77835 states and 283283 transitions. [2021-06-05 05:41:00,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 05:41:00,399 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:41:00,399 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:41:00,599 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,122 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:41:00,600 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:41:00,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:41:00,600 INFO L82 PathProgramCache]: Analyzing trace with hash -1432527205, now seen corresponding path program 76 times [2021-06-05 05:41:00,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:41:00,600 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124203773] [2021-06-05 05:41:00,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:41:00,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:41:00,690 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:41:00,690 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:41:00,690 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124203773] [2021-06-05 05:41:00,691 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124203773] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:41:00,691 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104082202] [2021-06-05 05:41:00,691 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 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:41:00,714 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:41:00,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:41:00,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 05:41:00,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:41:00,862 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:41:00,862 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [104082202] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:41:00,862 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:41:00,862 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 05:41:00,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683392518] [2021-06-05 05:41:00,862 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:41:00,862 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:41:00,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:41:00,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:41:00,863 INFO L87 Difference]: Start difference. First operand 77835 states and 283283 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:41:02,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:41:02,094 INFO L93 Difference]: Finished difference Result 95030 states and 344348 transitions. [2021-06-05 05:41:02,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 05:41:02,095 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 05:41:02,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:41:02,329 INFO L225 Difference]: With dead ends: 95030 [2021-06-05 05:41:02,329 INFO L226 Difference]: Without dead ends: 95001 [2021-06-05 05:41:02,329 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 344.6ms TimeCoverageRelationStatistics Valid=168, Invalid=482, Unknown=0, NotChecked=0, Total=650 [2021-06-05 05:41:02,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95001 states. [2021-06-05 05:41:03,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95001 to 77848. [2021-06-05 05:41:03,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77848 states, 77847 states have (on average 3.6396136010379334) internal successors, (283333), 77847 states have internal predecessors, (283333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:41:04,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77848 states to 77848 states and 283333 transitions. [2021-06-05 05:41:04,170 INFO L78 Accepts]: Start accepts. Automaton has 77848 states and 283333 transitions. Word has length 25 [2021-06-05 05:41:04,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:41:04,170 INFO L482 AbstractCegarLoop]: Abstraction has 77848 states and 283333 transitions. [2021-06-05 05:41:04,170 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:41:04,170 INFO L276 IsEmpty]: Start isEmpty. Operand 77848 states and 283333 transitions. [2021-06-05 05:41:04,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 05:41:04,273 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:41:04,273 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:41:04,475 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable188,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:41:04,476 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:41:04,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:41:04,476 INFO L82 PathProgramCache]: Analyzing trace with hash 2063400087, now seen corresponding path program 77 times [2021-06-05 05:41:04,476 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:41:04,477 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017564692] [2021-06-05 05:41:04,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:41:04,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:41:04,561 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:41:04,561 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:41:04,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017564692] [2021-06-05 05:41:04,561 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1017564692] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:41:04,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409851618] [2021-06-05 05:41:04,561 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 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:41:04,585 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:41:04,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:41:04,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 05:41:04,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:41:04,764 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:41:04,764 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [409851618] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:41:04,764 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:41:04,765 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 05:41:04,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594276762] [2021-06-05 05:41:04,765 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 05:41:04,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:41:04,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 05:41:04,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:41:04,765 INFO L87 Difference]: Start difference. First operand 77848 states and 283333 transitions. Second operand has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:41:06,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:41:06,288 INFO L93 Difference]: Finished difference Result 88722 states and 324271 transitions. [2021-06-05 05:41:06,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 05:41:06,289 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 05:41:06,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:41:06,518 INFO L225 Difference]: With dead ends: 88722 [2021-06-05 05:41:06,518 INFO L226 Difference]: Without dead ends: 88697 [2021-06-05 05:41:06,518 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 1006.7ms TimeCoverageRelationStatistics Valid=353, Invalid=1053, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 05:41:06,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88697 states. [2021-06-05 05:41:07,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88697 to 77835. [2021-06-05 05:41:08,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77835 states, 77834 states have (on average 3.639591952103194) internal successors, (283284), 77834 states have internal predecessors, (283284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:41:08,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77835 states to 77835 states and 283284 transitions. [2021-06-05 05:41:08,697 INFO L78 Accepts]: Start accepts. Automaton has 77835 states and 283284 transitions. Word has length 25 [2021-06-05 05:41:08,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:41:08,698 INFO L482 AbstractCegarLoop]: Abstraction has 77835 states and 283284 transitions. [2021-06-05 05:41:08,698 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:41:08,698 INFO L276 IsEmpty]: Start isEmpty. Operand 77835 states and 283284 transitions. [2021-06-05 05:41:08,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 05:41:08,848 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:41:08,848 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:41:09,052 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192,124 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:41:09,053 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:41:09,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:41:09,053 INFO L82 PathProgramCache]: Analyzing trace with hash 781968495, now seen corresponding path program 78 times [2021-06-05 05:41:09,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:41:09,053 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107743279] [2021-06-05 05:41:09,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:41:09,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:41:09,151 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:41:09,151 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:41:09,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107743279] [2021-06-05 05:41:09,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107743279] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:41:09,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2040709268] [2021-06-05 05:41:09,151 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:41:09,174 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:41:09,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:41:09,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 05:41:09,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:41:09,343 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:41:09,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2040709268] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:41:09,343 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:41:09,343 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 05:41:09,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972459703] [2021-06-05 05:41:09,343 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:41:09,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:41:09,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:41:09,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:41:09,344 INFO L87 Difference]: Start difference. First operand 77835 states and 283284 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:41:10,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:41:10,229 INFO L93 Difference]: Finished difference Result 94397 states and 342391 transitions. [2021-06-05 05:41:10,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 05:41:10,230 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 05:41:10,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:41:10,462 INFO L225 Difference]: With dead ends: 94397 [2021-06-05 05:41:10,462 INFO L226 Difference]: Without dead ends: 94360 [2021-06-05 05:41:10,463 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 263 ImplicationChecksByTransitivity, 460.0ms TimeCoverageRelationStatistics Valid=195, Invalid=617, Unknown=0, NotChecked=0, Total=812 [2021-06-05 05:41:10,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94360 states. [2021-06-05 05:41:12,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94360 to 77898. [2021-06-05 05:41:12,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77898 states, 77897 states have (on average 3.6398449234245223) internal successors, (283533), 77897 states have internal predecessors, (283533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:41:12,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77898 states to 77898 states and 283533 transitions. [2021-06-05 05:41:12,829 INFO L78 Accepts]: Start accepts. Automaton has 77898 states and 283533 transitions. Word has length 25 [2021-06-05 05:41:12,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:41:12,830 INFO L482 AbstractCegarLoop]: Abstraction has 77898 states and 283533 transitions. [2021-06-05 05:41:12,830 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:41:12,830 INFO L276 IsEmpty]: Start isEmpty. Operand 77898 states and 283533 transitions. [2021-06-05 05:41:12,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 05:41:12,965 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:41:12,965 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:41:13,180 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:41:13,181 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:41:13,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:41:13,181 INFO L82 PathProgramCache]: Analyzing trace with hash -17071509, now seen corresponding path program 79 times [2021-06-05 05:41:13,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:41:13,181 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515286653] [2021-06-05 05:41:13,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:41:13,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:41:13,296 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:41:13,296 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:41:13,296 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515286653] [2021-06-05 05:41:13,296 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515286653] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:41:13,297 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [659911606] [2021-06-05 05:41:13,297 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 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:41:13,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:41:13,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 05:41:13,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:41:13,563 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:41:13,563 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [659911606] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:41:13,563 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:41:13,563 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 05:41:13,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608432029] [2021-06-05 05:41:13,564 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 05:41:13,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:41:13,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 05:41:13,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:41:13,564 INFO L87 Difference]: Start difference. First operand 77898 states and 283533 transitions. Second operand has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:41:15,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:41:15,195 INFO L93 Difference]: Finished difference Result 106020 states and 385942 transitions. [2021-06-05 05:41:15,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 05:41:15,196 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 05:41:15,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:41:15,484 INFO L225 Difference]: With dead ends: 106020 [2021-06-05 05:41:15,484 INFO L226 Difference]: Without dead ends: 105968 [2021-06-05 05:41:15,484 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 431 ImplicationChecksByTransitivity, 738.0ms TimeCoverageRelationStatistics Valid=363, Invalid=1119, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 05:41:15,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105968 states. [2021-06-05 05:41:17,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105968 to 77888. [2021-06-05 05:41:17,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77888 states, 77887 states have (on average 3.639901395611591) internal successors, (283501), 77887 states have internal predecessors, (283501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:41:17,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77888 states to 77888 states and 283501 transitions. [2021-06-05 05:41:17,362 INFO L78 Accepts]: Start accepts. Automaton has 77888 states and 283501 transitions. Word has length 25 [2021-06-05 05:41:17,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:41:17,362 INFO L482 AbstractCegarLoop]: Abstraction has 77888 states and 283501 transitions. [2021-06-05 05:41:17,362 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:41:17,362 INFO L276 IsEmpty]: Start isEmpty. Operand 77888 states and 283501 transitions. [2021-06-05 05:41:17,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 05:41:17,471 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:41:17,471 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:41:17,671 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable200 [2021-06-05 05:41:17,672 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:41:17,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:41:17,672 INFO L82 PathProgramCache]: Analyzing trace with hash -98470565, now seen corresponding path program 80 times [2021-06-05 05:41:17,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:41:17,672 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882498123] [2021-06-05 05:41:17,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:41:17,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:41:17,756 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:41:17,756 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:41:17,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882498123] [2021-06-05 05:41:17,761 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882498123] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:41:17,762 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524738868] [2021-06-05 05:41:17,762 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 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:41:17,791 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:41:17,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:41:17,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 05:41:17,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:41:17,972 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:41:17,972 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [524738868] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:41:17,972 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:41:17,972 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 05:41:17,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710567404] [2021-06-05 05:41:17,972 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 05:41:17,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:41:17,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 05:41:17,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:41:17,973 INFO L87 Difference]: Start difference. First operand 77888 states and 283501 transitions. Second operand has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:41:19,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:41:19,510 INFO L93 Difference]: Finished difference Result 96396 states and 348721 transitions. [2021-06-05 05:41:19,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 05:41:19,511 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 05:41:19,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:41:19,757 INFO L225 Difference]: With dead ends: 96396 [2021-06-05 05:41:19,757 INFO L226 Difference]: Without dead ends: 96342 [2021-06-05 05:41:19,757 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 383 ImplicationChecksByTransitivity, 626.7ms TimeCoverageRelationStatistics Valid=302, Invalid=1030, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:41:19,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96342 states. [2021-06-05 05:41:21,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96342 to 77888. [2021-06-05 05:41:21,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77888 states, 77887 states have (on average 3.6401581778730727) internal successors, (283521), 77887 states have internal predecessors, (283521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:41:22,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77888 states to 77888 states and 283521 transitions. [2021-06-05 05:41:22,003 INFO L78 Accepts]: Start accepts. Automaton has 77888 states and 283521 transitions. Word has length 25 [2021-06-05 05:41:22,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:41:22,003 INFO L482 AbstractCegarLoop]: Abstraction has 77888 states and 283521 transitions. [2021-06-05 05:41:22,003 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:41:22,004 INFO L276 IsEmpty]: Start isEmpty. Operand 77888 states and 283521 transitions. [2021-06-05 05:41:22,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 05:41:22,107 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:41:22,107 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:41:22,307 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable204,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:41:22,307 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:41:22,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:41:22,308 INFO L82 PathProgramCache]: Analyzing trace with hash 1506823447, now seen corresponding path program 81 times [2021-06-05 05:41:22,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:41:22,308 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146352907] [2021-06-05 05:41:22,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:41:22,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:41:22,388 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:41:22,388 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:41:22,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146352907] [2021-06-05 05:41:22,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146352907] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:41:22,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413890930] [2021-06-05 05:41:22,388 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 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:41:22,424 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 05:41:22,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:41:22,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:41:22,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:41:22,585 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:41:22,585 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1413890930] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:41:22,585 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:41:22,585 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-06-05 05:41:22,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591658203] [2021-06-05 05:41:22,586 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 05:41:22,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:41:22,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 05:41:22,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-06-05 05:41:22,586 INFO L87 Difference]: Start difference. First operand 77888 states and 283521 transitions. Second operand has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:41:23,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:41:23,179 INFO L93 Difference]: Finished difference Result 85565 states and 309594 transitions. [2021-06-05 05:41:23,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 05:41:23,180 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 05:41:23,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:41:23,392 INFO L225 Difference]: With dead ends: 85565 [2021-06-05 05:41:23,392 INFO L226 Difference]: Without dead ends: 85370 [2021-06-05 05:41:23,392 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 225.9ms TimeCoverageRelationStatistics Valid=90, Invalid=290, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:41:23,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85370 states. [2021-06-05 05:41:25,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85370 to 78997. [2021-06-05 05:41:25,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78997 states, 78996 states have (on average 3.6391083092814824) internal successors, (287475), 78996 states have internal predecessors, (287475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:41:25,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78997 states to 78997 states and 287475 transitions. [2021-06-05 05:41:25,542 INFO L78 Accepts]: Start accepts. Automaton has 78997 states and 287475 transitions. Word has length 25 [2021-06-05 05:41:25,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:41:25,542 INFO L482 AbstractCegarLoop]: Abstraction has 78997 states and 287475 transitions. [2021-06-05 05:41:25,542 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:41:25,542 INFO L276 IsEmpty]: Start isEmpty. Operand 78997 states and 287475 transitions. [2021-06-05 05:41:25,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 05:41:25,648 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:41:25,648 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:41:25,849 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable208 [2021-06-05 05:41:25,849 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:41:25,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:41:25,849 INFO L82 PathProgramCache]: Analyzing trace with hash -1345964487, now seen corresponding path program 82 times [2021-06-05 05:41:25,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:41:25,849 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354554648] [2021-06-05 05:41:25,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:41:25,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:41:25,924 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:41:25,925 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:41:25,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354554648] [2021-06-05 05:41:25,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354554648] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:41:25,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1391292588] [2021-06-05 05:41:25,925 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 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:41:25,954 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:41:25,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:41:25,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:41:25,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:41:26,057 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:41:26,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1391292588] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:41:26,057 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:41:26,057 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2021-06-05 05:41:26,057 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436940732] [2021-06-05 05:41:26,058 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 05:41:26,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:41:26,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 05:41:26,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-06-05 05:41:26,058 INFO L87 Difference]: Start difference. First operand 78997 states and 287475 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:41:26,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:41:26,536 INFO L93 Difference]: Finished difference Result 79701 states and 289399 transitions. [2021-06-05 05:41:26,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 05:41:26,536 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 05:41:26,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:41:26,724 INFO L225 Difference]: With dead ends: 79701 [2021-06-05 05:41:26,724 INFO L226 Difference]: Without dead ends: 79594 [2021-06-05 05:41:26,725 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 129.7ms TimeCoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-06-05 05:41:26,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79594 states. [2021-06-05 05:41:28,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79594 to 79080. [2021-06-05 05:41:28,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79080 states, 79079 states have (on average 3.634719710669078) internal successors, (287430), 79079 states have internal predecessors, (287430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:41:28,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79080 states to 79080 states and 287430 transitions. [2021-06-05 05:41:28,830 INFO L78 Accepts]: Start accepts. Automaton has 79080 states and 287430 transitions. Word has length 25 [2021-06-05 05:41:28,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:41:28,830 INFO L482 AbstractCegarLoop]: Abstraction has 79080 states and 287430 transitions. [2021-06-05 05:41:28,830 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:41:28,830 INFO L276 IsEmpty]: Start isEmpty. Operand 79080 states and 287430 transitions. [2021-06-05 05:41:28,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 05:41:28,937 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:41:28,937 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:41:29,137 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable212 [2021-06-05 05:41:29,137 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:41:29,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:41:29,138 INFO L82 PathProgramCache]: Analyzing trace with hash 1425295639, now seen corresponding path program 83 times [2021-06-05 05:41:29,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:41:29,138 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477801898] [2021-06-05 05:41:29,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:41:29,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:41:29,199 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:41:29,199 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:41:29,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477801898] [2021-06-05 05:41:29,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477801898] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:41:29,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605308510] [2021-06-05 05:41:29,199 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 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:41:29,222 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:41:29,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:41:29,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 05:41:29,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:41:29,343 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:41:29,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [605308510] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:41:29,343 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:41:29,344 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-06-05 05:41:29,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505196944] [2021-06-05 05:41:29,344 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 05:41:29,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:41:29,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 05:41:29,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-06-05 05:41:29,344 INFO L87 Difference]: Start difference. First operand 79080 states and 287430 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:41:30,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:41:30,944 INFO L93 Difference]: Finished difference Result 93002 states and 336576 transitions. [2021-06-05 05:41:30,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 05:41:30,945 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 05:41:30,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:41:31,200 INFO L225 Difference]: With dead ends: 93002 [2021-06-05 05:41:31,200 INFO L226 Difference]: Without dead ends: 92906 [2021-06-05 05:41:31,200 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 533.7ms TimeCoverageRelationStatistics Valid=286, Invalid=1046, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:41:31,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92906 states. [2021-06-05 05:41:32,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92906 to 82584. [2021-06-05 05:41:32,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82584 states, 82583 states have (on average 3.6524829565406924) internal successors, (301633), 82583 states have internal predecessors, (301633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:41:32,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82584 states to 82584 states and 301633 transitions. [2021-06-05 05:41:32,939 INFO L78 Accepts]: Start accepts. Automaton has 82584 states and 301633 transitions. Word has length 25 [2021-06-05 05:41:32,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:41:32,939 INFO L482 AbstractCegarLoop]: Abstraction has 82584 states and 301633 transitions. [2021-06-05 05:41:32,939 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:41:32,939 INFO L276 IsEmpty]: Start isEmpty. Operand 82584 states and 301633 transitions. [2021-06-05 05:41:33,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 05:41:33,053 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:41:33,053 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:41:33,253 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2021-06-05 05:41:33,254 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:41:33,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:41:33,254 INFO L82 PathProgramCache]: Analyzing trace with hash 13627927, now seen corresponding path program 84 times [2021-06-05 05:41:33,254 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:41:33,254 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970231815] [2021-06-05 05:41:33,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:41:33,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:41:33,362 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:41:33,363 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:41:33,363 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970231815] [2021-06-05 05:41:33,363 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1970231815] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:41:33,363 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582195637] [2021-06-05 05:41:33,363 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 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:41:33,386 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 05:41:33,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:41:33,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 05:41:33,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:41:33,524 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:41:33,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [582195637] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:41:33,524 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:41:33,524 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 05:41:33,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97156855] [2021-06-05 05:41:33,524 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:41:33,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:41:33,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:41:33,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:41:33,525 INFO L87 Difference]: Start difference. First operand 82584 states and 301633 transitions. Second operand has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:41:34,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:41:34,708 INFO L93 Difference]: Finished difference Result 101778 states and 369627 transitions. [2021-06-05 05:41:34,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 05:41:34,708 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 05:41:34,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:41:34,970 INFO L225 Difference]: With dead ends: 101778 [2021-06-05 05:41:34,970 INFO L226 Difference]: Without dead ends: 101745 [2021-06-05 05:41:34,971 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 357.1ms TimeCoverageRelationStatistics Valid=152, Invalid=550, Unknown=0, NotChecked=0, Total=702 [2021-06-05 05:41:35,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101745 states. [2021-06-05 05:41:36,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101745 to 82622. [2021-06-05 05:41:36,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82622 states, 82621 states have (on average 3.6528485494002734) internal successors, (301802), 82621 states have internal predecessors, (301802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:41:37,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82622 states to 82622 states and 301802 transitions. [2021-06-05 05:41:37,462 INFO L78 Accepts]: Start accepts. Automaton has 82622 states and 301802 transitions. Word has length 25 [2021-06-05 05:41:37,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:41:37,462 INFO L482 AbstractCegarLoop]: Abstraction has 82622 states and 301802 transitions. [2021-06-05 05:41:37,463 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:41:37,463 INFO L276 IsEmpty]: Start isEmpty. Operand 82622 states and 301802 transitions. [2021-06-05 05:41:37,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 05:41:37,594 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:41:37,594 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:41:37,795 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable217,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:41:37,795 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:41:37,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:41:37,795 INFO L82 PathProgramCache]: Analyzing trace with hash 992185371, now seen corresponding path program 85 times [2021-06-05 05:41:37,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:41:37,796 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130880026] [2021-06-05 05:41:37,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:41:37,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:41:37,908 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:41:37,909 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:41:37,909 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130880026] [2021-06-05 05:41:37,909 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130880026] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:41:37,909 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1657803650] [2021-06-05 05:41:37,909 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 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:41:37,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:41:37,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 05:41:37,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:41:38,096 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:41:38,097 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1657803650] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:41:38,097 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:41:38,097 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 05:41:38,097 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037375909] [2021-06-05 05:41:38,097 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 05:41:38,097 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:41:38,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 05:41:38,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:41:38,097 INFO L87 Difference]: Start difference. First operand 82622 states and 301802 transitions. Second operand has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:41:39,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:41:39,004 INFO L93 Difference]: Finished difference Result 103177 states and 374373 transitions. [2021-06-05 05:41:39,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 05:41:39,005 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 05:41:39,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:41:39,279 INFO L225 Difference]: With dead ends: 103177 [2021-06-05 05:41:39,279 INFO L226 Difference]: Without dead ends: 103066 [2021-06-05 05:41:39,279 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 408.9ms TimeCoverageRelationStatistics Valid=195, Invalid=675, Unknown=0, NotChecked=0, Total=870 [2021-06-05 05:41:39,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103066 states. [2021-06-05 05:41:41,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103066 to 82700. [2021-06-05 05:41:41,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82700 states, 82699 states have (on average 3.653224343704277) internal successors, (302118), 82699 states have internal predecessors, (302118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:41:41,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82700 states to 82700 states and 302118 transitions. [2021-06-05 05:41:41,479 INFO L78 Accepts]: Start accepts. Automaton has 82700 states and 302118 transitions. Word has length 25 [2021-06-05 05:41:41,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:41:41,479 INFO L482 AbstractCegarLoop]: Abstraction has 82700 states and 302118 transitions. [2021-06-05 05:41:41,479 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:41:41,479 INFO L276 IsEmpty]: Start isEmpty. Operand 82700 states and 302118 transitions. [2021-06-05 05:41:41,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 05:41:41,596 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:41:41,596 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:41:41,796 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable221 [2021-06-05 05:41:41,797 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:41:41,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:41:41,797 INFO L82 PathProgramCache]: Analyzing trace with hash 193145367, now seen corresponding path program 86 times [2021-06-05 05:41:41,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:41:41,797 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825665762] [2021-06-05 05:41:41,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:41:41,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:41:41,903 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:41:41,903 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:41:41,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825665762] [2021-06-05 05:41:41,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825665762] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:41:41,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [300951575] [2021-06-05 05:41:41,903 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 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:41:41,930 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:41:41,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:41:41,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 05:41:41,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:41:42,099 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:41:42,100 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [300951575] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:41:42,100 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:41:42,100 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:41:42,100 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182920404] [2021-06-05 05:41:42,100 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:41:42,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:41:42,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:41:42,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=258, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:41:42,101 INFO L87 Difference]: Start difference. First operand 82700 states and 302118 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:41:43,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:41:43,456 INFO L93 Difference]: Finished difference Result 96794 states and 354161 transitions. [2021-06-05 05:41:43,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 05:41:43,456 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 05:41:43,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:41:43,747 INFO L225 Difference]: With dead ends: 96794 [2021-06-05 05:41:43,747 INFO L226 Difference]: Without dead ends: 96755 [2021-06-05 05:41:43,748 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 484.7ms TimeCoverageRelationStatistics Valid=269, Invalid=853, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 05:41:43,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96755 states. [2021-06-05 05:41:45,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96755 to 82707. [2021-06-05 05:41:45,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82707 states, 82706 states have (on average 3.6533987860614707) internal successors, (302158), 82706 states have internal predecessors, (302158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:41:45,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82707 states to 82707 states and 302158 transitions. [2021-06-05 05:41:45,637 INFO L78 Accepts]: Start accepts. Automaton has 82707 states and 302158 transitions. Word has length 25 [2021-06-05 05:41:45,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:41:45,637 INFO L482 AbstractCegarLoop]: Abstraction has 82707 states and 302158 transitions. [2021-06-05 05:41:45,637 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:41:45,637 INFO L276 IsEmpty]: Start isEmpty. Operand 82707 states and 302158 transitions. [2021-06-05 05:41:45,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 05:41:45,751 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:41:45,751 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:41:45,951 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable225 [2021-06-05 05:41:45,951 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:41:45,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:41:45,952 INFO L82 PathProgramCache]: Analyzing trace with hash -1088286225, now seen corresponding path program 87 times [2021-06-05 05:41:45,952 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:41:45,952 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981715331] [2021-06-05 05:41:45,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:41:45,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:41:46,059 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:41:46,060 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:41:46,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981715331] [2021-06-05 05:41:46,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981715331] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:41:46,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552060916] [2021-06-05 05:41:46,060 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 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:41:46,091 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 05:41:46,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:41:46,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 05:41:46,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:41:46,258 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:41:46,258 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [552060916] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:41:46,259 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:41:46,259 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 05:41:46,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982384001] [2021-06-05 05:41:46,259 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 05:41:46,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:41:46,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 05:41:46,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:41:46,259 INFO L87 Difference]: Start difference. First operand 82707 states and 302158 transitions. Second operand has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:41:46,710 WARN L205 SmtUtils]: Spent 410.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 29 [2021-06-05 05:41:47,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:41:47,719 INFO L93 Difference]: Finished difference Result 101984 states and 370229 transitions. [2021-06-05 05:41:47,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 05:41:47,719 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 05:41:47,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:41:47,993 INFO L225 Difference]: With dead ends: 101984 [2021-06-05 05:41:47,993 INFO L226 Difference]: Without dead ends: 101951 [2021-06-05 05:41:47,993 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 958.5ms TimeCoverageRelationStatistics Valid=236, Invalid=820, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 05:41:48,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101951 states. [2021-06-05 05:41:50,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101951 to 82749. [2021-06-05 05:41:50,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82749 states, 82748 states have (on average 3.6533209261855273) internal successors, (302305), 82748 states have internal predecessors, (302305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:41:50,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82749 states to 82749 states and 302305 transitions. [2021-06-05 05:41:50,319 INFO L78 Accepts]: Start accepts. Automaton has 82749 states and 302305 transitions. Word has length 25 [2021-06-05 05:41:50,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:41:50,319 INFO L482 AbstractCegarLoop]: Abstraction has 82749 states and 302305 transitions. [2021-06-05 05:41:50,319 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:41:50,319 INFO L276 IsEmpty]: Start isEmpty. Operand 82749 states and 302305 transitions. [2021-06-05 05:41:50,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 05:41:50,426 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:41:50,426 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:41:50,636 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable229,134 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:41:50,637 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:41:50,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:41:50,637 INFO L82 PathProgramCache]: Analyzing trace with hash -1887326229, now seen corresponding path program 88 times [2021-06-05 05:41:50,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:41:50,637 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784005018] [2021-06-05 05:41:50,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:41:50,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:41:50,724 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:41:50,724 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:41:50,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784005018] [2021-06-05 05:41:50,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784005018] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:41:50,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1769716576] [2021-06-05 05:41:50,724 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 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:41:50,748 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:41:50,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:41:50,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 05:41:50,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:41:50,912 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:41:50,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1769716576] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:41:50,912 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:41:50,912 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:41:50,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111686941] [2021-06-05 05:41:50,912 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:41:50,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:41:50,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:41:50,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=256, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:41:50,913 INFO L87 Difference]: Start difference. First operand 82749 states and 302305 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:41:52,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:41:52,429 INFO L93 Difference]: Finished difference Result 115207 states and 419837 transitions. [2021-06-05 05:41:52,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 05:41:52,436 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 05:41:52,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:41:52,792 INFO L225 Difference]: With dead ends: 115207 [2021-06-05 05:41:52,793 INFO L226 Difference]: Without dead ends: 115157 [2021-06-05 05:41:52,793 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 349 ImplicationChecksByTransitivity, 513.4ms TimeCoverageRelationStatistics Valid=278, Invalid=912, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 05:41:52,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115157 states. [2021-06-05 05:41:54,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115157 to 82759. [2021-06-05 05:41:54,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82759 states, 82758 states have (on average 3.653821986998236) internal successors, (302383), 82758 states have internal predecessors, (302383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:41:54,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82759 states to 82759 states and 302383 transitions. [2021-06-05 05:41:54,784 INFO L78 Accepts]: Start accepts. Automaton has 82759 states and 302383 transitions. Word has length 25 [2021-06-05 05:41:54,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:41:54,784 INFO L482 AbstractCegarLoop]: Abstraction has 82759 states and 302383 transitions. [2021-06-05 05:41:54,784 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:41:54,784 INFO L276 IsEmpty]: Start isEmpty. Operand 82759 states and 302383 transitions. [2021-06-05 05:41:54,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 05:41:54,902 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:41:54,902 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:41:55,102 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable233 [2021-06-05 05:41:55,102 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:41:55,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:41:55,103 INFO L82 PathProgramCache]: Analyzing trace with hash -1968725285, now seen corresponding path program 89 times [2021-06-05 05:41:55,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:41:55,103 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792842016] [2021-06-05 05:41:55,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:41:55,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:41:55,176 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:41:55,177 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:41:55,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792842016] [2021-06-05 05:41:55,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792842016] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:41:55,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [812301026] [2021-06-05 05:41:55,177 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 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:41:55,200 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:41:55,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:41:55,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 05:41:55,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:41:55,791 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:41:55,792 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [812301026] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:41:55,792 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:41:55,792 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:41:55,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604442757] [2021-06-05 05:41:55,792 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:41:55,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:41:55,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:41:55,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=253, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:41:55,793 INFO L87 Difference]: Start difference. First operand 82759 states and 302383 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:41:56,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:41:56,842 INFO L93 Difference]: Finished difference Result 101895 states and 369939 transitions. [2021-06-05 05:41:56,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 05:41:56,843 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 05:41:56,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:41:57,114 INFO L225 Difference]: With dead ends: 101895 [2021-06-05 05:41:57,114 INFO L226 Difference]: Without dead ends: 101841 [2021-06-05 05:41:57,115 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 447 ImplicationChecksByTransitivity, 951.3ms TimeCoverageRelationStatistics Valid=335, Invalid=1147, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 05:41:57,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101841 states. [2021-06-05 05:41:59,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101841 to 82803. [2021-06-05 05:41:59,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82803 states, 82802 states have (on average 3.6542112509359677) internal successors, (302576), 82802 states have internal predecessors, (302576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:41:59,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82803 states to 82803 states and 302576 transitions. [2021-06-05 05:41:59,442 INFO L78 Accepts]: Start accepts. Automaton has 82803 states and 302576 transitions. Word has length 25 [2021-06-05 05:41:59,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:41:59,442 INFO L482 AbstractCegarLoop]: Abstraction has 82803 states and 302576 transitions. [2021-06-05 05:41:59,442 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:41:59,442 INFO L276 IsEmpty]: Start isEmpty. Operand 82803 states and 302576 transitions. [2021-06-05 05:41:59,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 05:41:59,558 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:41:59,558 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:41:59,758 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable237 [2021-06-05 05:41:59,758 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:41:59,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:41:59,758 INFO L82 PathProgramCache]: Analyzing trace with hash 118188467, now seen corresponding path program 90 times [2021-06-05 05:41:59,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:41:59,758 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227214766] [2021-06-05 05:41:59,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:41:59,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:41:59,855 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:41:59,855 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:41:59,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227214766] [2021-06-05 05:41:59,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1227214766] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:41:59,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1762221687] [2021-06-05 05:41:59,855 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:41:59,878 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:41:59,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:41:59,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 05:41:59,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:42:00,077 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:42:00,077 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1762221687] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:42:00,077 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:42:00,077 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 05:42:00,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477060814] [2021-06-05 05:42:00,077 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 05:42:00,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:42:00,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 05:42:00,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:42:00,078 INFO L87 Difference]: Start difference. First operand 82803 states and 302576 transitions. Second operand has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:42:01,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:42:01,523 INFO L93 Difference]: Finished difference Result 100879 states and 366869 transitions. [2021-06-05 05:42:01,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 05:42:01,532 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 05:42:01,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:42:01,861 INFO L225 Difference]: With dead ends: 100879 [2021-06-05 05:42:01,861 INFO L226 Difference]: Without dead ends: 100846 [2021-06-05 05:42:01,862 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 509.0ms TimeCoverageRelationStatistics Valid=160, Invalid=652, Unknown=0, NotChecked=0, Total=812 [2021-06-05 05:42:01,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100846 states. [2021-06-05 05:42:03,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100846 to 82884. [2021-06-05 05:42:03,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82884 states, 82883 states have (on average 3.6542958145820013) internal successors, (302879), 82883 states have internal predecessors, (302879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:42:03,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82884 states to 82884 states and 302879 transitions. [2021-06-05 05:42:03,695 INFO L78 Accepts]: Start accepts. Automaton has 82884 states and 302879 transitions. Word has length 25 [2021-06-05 05:42:03,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:42:03,695 INFO L482 AbstractCegarLoop]: Abstraction has 82884 states and 302879 transitions. [2021-06-05 05:42:03,695 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:42:03,695 INFO L276 IsEmpty]: Start isEmpty. Operand 82884 states and 302879 transitions. [2021-06-05 05:42:03,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 05:42:03,811 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:42:03,811 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:42:04,011 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable241,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:42:04,011 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:42:04,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:42:04,012 INFO L82 PathProgramCache]: Analyzing trace with hash -680851537, now seen corresponding path program 91 times [2021-06-05 05:42:04,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:42:04,012 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541776554] [2021-06-05 05:42:04,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:42:04,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:42:04,117 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:42:04,117 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:42:04,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541776554] [2021-06-05 05:42:04,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541776554] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:42:04,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1661959066] [2021-06-05 05:42:04,117 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 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:42:04,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:42:04,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 05:42:04,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:42:04,330 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:42:04,330 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1661959066] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:42:04,330 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:42:04,330 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:42:04,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809988651] [2021-06-05 05:42:04,330 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:42:04,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:42:04,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:42:04,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:42:04,331 INFO L87 Difference]: Start difference. First operand 82884 states and 302879 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:42:05,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:42:05,862 INFO L93 Difference]: Finished difference Result 114377 states and 417122 transitions. [2021-06-05 05:42:05,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 05:42:05,862 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 05:42:05,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:42:06,177 INFO L225 Difference]: With dead ends: 114377 [2021-06-05 05:42:06,177 INFO L226 Difference]: Without dead ends: 114327 [2021-06-05 05:42:06,177 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 544.1ms TimeCoverageRelationStatistics Valid=226, Invalid=830, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 05:42:06,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114327 states. [2021-06-05 05:42:08,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114327 to 82862. [2021-06-05 05:42:08,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82862 states, 82861 states have (on average 3.6543609176814185) internal successors, (302804), 82861 states have internal predecessors, (302804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:42:08,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82862 states to 82862 states and 302804 transitions. [2021-06-05 05:42:08,751 INFO L78 Accepts]: Start accepts. Automaton has 82862 states and 302804 transitions. Word has length 25 [2021-06-05 05:42:08,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:42:08,751 INFO L482 AbstractCegarLoop]: Abstraction has 82862 states and 302804 transitions. [2021-06-05 05:42:08,751 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:42:08,752 INFO L276 IsEmpty]: Start isEmpty. Operand 82862 states and 302804 transitions. [2021-06-05 05:42:08,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 05:42:08,870 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:42:08,870 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:42:09,071 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable245 [2021-06-05 05:42:09,071 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:42:09,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:42:09,072 INFO L82 PathProgramCache]: Analyzing trace with hash -762250593, now seen corresponding path program 92 times [2021-06-05 05:42:09,072 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:42:09,072 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408206721] [2021-06-05 05:42:09,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:42:09,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:42:09,154 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:42:09,154 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:42:09,154 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408206721] [2021-06-05 05:42:09,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408206721] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:42:09,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1017196297] [2021-06-05 05:42:09,155 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 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:42:09,177 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:42:09,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:42:09,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 05:42:09,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:42:09,334 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:42:09,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1017196297] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:42:09,335 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:42:09,335 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:42:09,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224519106] [2021-06-05 05:42:09,335 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:42:09,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:42:09,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:42:09,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:42:09,335 INFO L87 Difference]: Start difference. First operand 82862 states and 302804 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:42:10,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:42:10,226 INFO L93 Difference]: Finished difference Result 104310 states and 378454 transitions. [2021-06-05 05:42:10,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 05:42:10,226 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 05:42:10,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:42:10,911 INFO L225 Difference]: With dead ends: 104310 [2021-06-05 05:42:10,911 INFO L226 Difference]: Without dead ends: 104256 [2021-06-05 05:42:10,911 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 288 ImplicationChecksByTransitivity, 407.5ms TimeCoverageRelationStatistics Valid=221, Invalid=771, Unknown=0, NotChecked=0, Total=992 [2021-06-05 05:42:11,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104256 states. [2021-06-05 05:42:12,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104256 to 82924. [2021-06-05 05:42:12,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82924 states, 82923 states have (on average 3.6555599773283647) internal successors, (303130), 82923 states have internal predecessors, (303130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:42:12,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82924 states to 82924 states and 303130 transitions. [2021-06-05 05:42:12,595 INFO L78 Accepts]: Start accepts. Automaton has 82924 states and 303130 transitions. Word has length 25 [2021-06-05 05:42:12,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:42:12,595 INFO L482 AbstractCegarLoop]: Abstraction has 82924 states and 303130 transitions. [2021-06-05 05:42:12,595 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:42:12,595 INFO L276 IsEmpty]: Start isEmpty. Operand 82924 states and 303130 transitions. [2021-06-05 05:42:12,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 05:42:12,709 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:42:12,709 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:42:12,909 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable249 [2021-06-05 05:42:12,910 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:42:12,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:42:12,910 INFO L82 PathProgramCache]: Analyzing trace with hash -348634661, now seen corresponding path program 93 times [2021-06-05 05:42:12,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:42:12,910 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861572736] [2021-06-05 05:42:12,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:42:12,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:42:12,992 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:42:12,992 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:42:12,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861572736] [2021-06-05 05:42:12,992 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861572736] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:42:12,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701186956] [2021-06-05 05:42:12,992 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 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:42:13,027 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:42:13,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:42:13,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 05:42:13,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:42:13,190 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:42:13,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [701186956] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:42:13,190 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:42:13,190 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:42:13,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812736901] [2021-06-05 05:42:13,190 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:42:13,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:42:13,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:42:13,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:42:13,191 INFO L87 Difference]: Start difference. First operand 82924 states and 303130 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:42:14,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:42:14,761 INFO L93 Difference]: Finished difference Result 104844 states and 380478 transitions. [2021-06-05 05:42:14,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 05:42:14,762 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 05:42:14,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:42:15,056 INFO L225 Difference]: With dead ends: 104844 [2021-06-05 05:42:15,056 INFO L226 Difference]: Without dead ends: 104794 [2021-06-05 05:42:15,056 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 409 ImplicationChecksByTransitivity, 574.6ms TimeCoverageRelationStatistics Valid=310, Invalid=1172, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 05:42:15,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104794 states. [2021-06-05 05:42:16,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104794 to 82938. [2021-06-05 05:42:16,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82938 states, 82937 states have (on average 3.656293331082629) internal successors, (303242), 82937 states have internal predecessors, (303242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:42:17,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82938 states to 82938 states and 303242 transitions. [2021-06-05 05:42:17,531 INFO L78 Accepts]: Start accepts. Automaton has 82938 states and 303242 transitions. Word has length 25 [2021-06-05 05:42:17,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:42:17,531 INFO L482 AbstractCegarLoop]: Abstraction has 82938 states and 303242 transitions. [2021-06-05 05:42:17,531 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:42:17,532 INFO L276 IsEmpty]: Start isEmpty. Operand 82938 states and 303242 transitions. [2021-06-05 05:42:17,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 05:42:17,678 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:42:17,678 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:42:17,878 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable253,140 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:42:17,878 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:42:17,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:42:17,879 INFO L82 PathProgramCache]: Analyzing trace with hash -540119201, now seen corresponding path program 94 times [2021-06-05 05:42:17,879 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:42:17,879 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503408061] [2021-06-05 05:42:17,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:42:17,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:42:17,947 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:42:17,947 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:42:17,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503408061] [2021-06-05 05:42:17,948 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503408061] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:42:17,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [953446370] [2021-06-05 05:42:17,948 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 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:42:17,985 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:42:17,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:42:17,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 05:42:17,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:42:18,115 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:42:18,115 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [953446370] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:42:18,115 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:42:18,115 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 05:42:18,115 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603332844] [2021-06-05 05:42:18,115 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 05:42:18,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:42:18,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 05:42:18,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2021-06-05 05:42:18,116 INFO L87 Difference]: Start difference. First operand 82938 states and 303242 transitions. Second operand has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:42:18,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:42:18,792 INFO L93 Difference]: Finished difference Result 83638 states and 305189 transitions. [2021-06-05 05:42:18,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 05:42:18,793 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 05:42:18,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:42:19,002 INFO L225 Difference]: With dead ends: 83638 [2021-06-05 05:42:19,002 INFO L226 Difference]: Without dead ends: 83581 [2021-06-05 05:42:19,002 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 213.4ms TimeCoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:42:19,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83581 states. [2021-06-05 05:42:20,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83581 to 83002. [2021-06-05 05:42:20,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83002 states, 83001 states have (on average 3.6559680003855375) internal successors, (303449), 83001 states have internal predecessors, (303449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:42:21,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83002 states to 83002 states and 303449 transitions. [2021-06-05 05:42:21,226 INFO L78 Accepts]: Start accepts. Automaton has 83002 states and 303449 transitions. Word has length 25 [2021-06-05 05:42:21,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:42:21,226 INFO L482 AbstractCegarLoop]: Abstraction has 83002 states and 303449 transitions. [2021-06-05 05:42:21,226 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:42:21,226 INFO L276 IsEmpty]: Start isEmpty. Operand 83002 states and 303449 transitions. [2021-06-05 05:42:21,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 05:42:21,343 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:42:21,343 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:42:21,544 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 141 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable257 [2021-06-05 05:42:21,544 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:42:21,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:42:21,544 INFO L82 PathProgramCache]: Analyzing trace with hash -1951786913, now seen corresponding path program 95 times [2021-06-05 05:42:21,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:42:21,545 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033661998] [2021-06-05 05:42:21,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:42:21,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:42:21,641 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:42:21,641 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:42:21,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033661998] [2021-06-05 05:42:21,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1033661998] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:42:21,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [82783391] [2021-06-05 05:42:21,641 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:42:21,667 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:42:21,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:42:21,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 05:42:21,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:42:21,788 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:42:21,788 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [82783391] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:42:21,788 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:42:21,788 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 05:42:21,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631467179] [2021-06-05 05:42:21,789 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 05:42:21,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:42:21,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 05:42:21,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-06-05 05:42:21,789 INFO L87 Difference]: Start difference. First operand 83002 states and 303449 transitions. Second operand has 16 states, 16 states have (on average 2.5) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:42:23,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:42:23,018 INFO L93 Difference]: Finished difference Result 101871 states and 370301 transitions. [2021-06-05 05:42:23,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 05:42:23,018 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 05:42:23,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:42:23,517 INFO L225 Difference]: With dead ends: 101871 [2021-06-05 05:42:23,517 INFO L226 Difference]: Without dead ends: 101820 [2021-06-05 05:42:23,517 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 228.9ms TimeCoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:42:23,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101820 states. [2021-06-05 05:42:25,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101820 to 83375. [2021-06-05 05:42:25,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83375 states, 83374 states have (on average 3.6553122076426705) internal successors, (304758), 83374 states have internal predecessors, (304758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:42:25,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83375 states to 83375 states and 304758 transitions. [2021-06-05 05:42:25,432 INFO L78 Accepts]: Start accepts. Automaton has 83375 states and 304758 transitions. Word has length 25 [2021-06-05 05:42:25,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:42:25,433 INFO L482 AbstractCegarLoop]: Abstraction has 83375 states and 304758 transitions. [2021-06-05 05:42:25,433 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:42:25,433 INFO L276 IsEmpty]: Start isEmpty. Operand 83375 states and 304758 transitions. [2021-06-05 05:42:25,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 05:42:25,547 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:42:25,547 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:42:25,747 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable260 [2021-06-05 05:42:25,747 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:42:25,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:42:25,748 INFO L82 PathProgramCache]: Analyzing trace with hash -973229469, now seen corresponding path program 96 times [2021-06-05 05:42:25,748 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:42:25,748 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176675381] [2021-06-05 05:42:25,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:42:25,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:42:25,865 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:42:25,865 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:42:25,865 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176675381] [2021-06-05 05:42:25,865 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176675381] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:42:25,865 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1798399921] [2021-06-05 05:42:25,865 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 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:42:25,888 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:42:25,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:42:25,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 05:42:25,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:42:26,038 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:42:26,038 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1798399921] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:42:26,039 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:42:26,039 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 05:42:26,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933947845] [2021-06-05 05:42:26,039 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:42:26,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:42:26,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:42:26,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:42:26,039 INFO L87 Difference]: Start difference. First operand 83375 states and 304758 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:42:27,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:42:27,373 INFO L93 Difference]: Finished difference Result 118493 states and 424280 transitions. [2021-06-05 05:42:27,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 05:42:27,374 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 05:42:27,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:42:27,702 INFO L225 Difference]: With dead ends: 118493 [2021-06-05 05:42:27,702 INFO L226 Difference]: Without dead ends: 118321 [2021-06-05 05:42:27,702 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 313.1ms TimeCoverageRelationStatistics Valid=114, Invalid=392, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:42:27,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118321 states. [2021-06-05 05:42:29,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118321 to 83375. [2021-06-05 05:42:29,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83375 states, 83374 states have (on average 3.6537769568450598) internal successors, (304630), 83374 states have internal predecessors, (304630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:42:30,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83375 states to 83375 states and 304630 transitions. [2021-06-05 05:42:30,281 INFO L78 Accepts]: Start accepts. Automaton has 83375 states and 304630 transitions. Word has length 25 [2021-06-05 05:42:30,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:42:30,281 INFO L482 AbstractCegarLoop]: Abstraction has 83375 states and 304630 transitions. [2021-06-05 05:42:30,281 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:42:30,281 INFO L276 IsEmpty]: Start isEmpty. Operand 83375 states and 304630 transitions. [2021-06-05 05:42:30,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 05:42:30,398 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:42:30,398 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:42:30,598 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable263,143 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:42:30,598 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:42:30,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:42:30,599 INFO L82 PathProgramCache]: Analyzing trace with hash -1772269473, now seen corresponding path program 97 times [2021-06-05 05:42:30,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:42:30,599 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931391204] [2021-06-05 05:42:30,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:42:30,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:42:30,704 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:42:30,704 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:42:30,704 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931391204] [2021-06-05 05:42:30,705 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931391204] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:42:30,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371772143] [2021-06-05 05:42:30,705 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:42:30,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:42:30,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 05:42:30,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:42:30,884 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:42:30,884 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1371772143] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:42:30,885 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:42:30,885 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 05:42:30,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754328851] [2021-06-05 05:42:30,885 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 05:42:30,885 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:42:30,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 05:42:30,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:42:30,885 INFO L87 Difference]: Start difference. First operand 83375 states and 304630 transitions. Second operand has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:42:32,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:42:32,615 INFO L93 Difference]: Finished difference Result 107765 states and 385439 transitions. [2021-06-05 05:42:32,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 05:42:32,616 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 05:42:32,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:42:32,908 INFO L225 Difference]: With dead ends: 107765 [2021-06-05 05:42:32,908 INFO L226 Difference]: Without dead ends: 107423 [2021-06-05 05:42:32,908 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 700.5ms TimeCoverageRelationStatistics Valid=428, Invalid=1294, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 05:42:33,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107423 states. [2021-06-05 05:42:34,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107423 to 83439. [2021-06-05 05:42:34,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83439 states, 83438 states have (on average 3.6545938301493326) internal successors, (304932), 83438 states have internal predecessors, (304932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:42:34,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83439 states to 83439 states and 304932 transitions. [2021-06-05 05:42:34,819 INFO L78 Accepts]: Start accepts. Automaton has 83439 states and 304932 transitions. Word has length 25 [2021-06-05 05:42:34,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:42:34,819 INFO L482 AbstractCegarLoop]: Abstraction has 83439 states and 304932 transitions. [2021-06-05 05:42:34,820 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:42:34,820 INFO L276 IsEmpty]: Start isEmpty. Operand 83439 states and 304932 transitions. [2021-06-05 05:42:34,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 05:42:34,934 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:42:34,934 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:42:35,136 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable266 [2021-06-05 05:42:35,137 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:42:35,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:42:35,137 INFO L82 PathProgramCache]: Analyzing trace with hash -305853537, now seen corresponding path program 98 times [2021-06-05 05:42:35,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:42:35,137 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691878502] [2021-06-05 05:42:35,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:42:35,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:42:35,204 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:42:35,204 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:42:35,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691878502] [2021-06-05 05:42:35,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691878502] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:42:35,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276289381] [2021-06-05 05:42:35,204 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 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:42:35,233 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:42:35,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:42:35,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 05:42:35,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:42:35,332 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:42:35,332 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1276289381] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:42:35,332 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:42:35,332 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 05:42:35,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231291299] [2021-06-05 05:42:35,333 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 05:42:35,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:42:35,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 05:42:35,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-06-05 05:42:35,333 INFO L87 Difference]: Start difference. First operand 83439 states and 304932 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) [2021-06-05 05:42:36,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:42:36,280 INFO L93 Difference]: Finished difference Result 85157 states and 310455 transitions. [2021-06-05 05:42:36,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 05:42:36,281 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 25 [2021-06-05 05:42:36,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:42:36,499 INFO L225 Difference]: With dead ends: 85157 [2021-06-05 05:42:36,499 INFO L226 Difference]: Without dead ends: 85092 [2021-06-05 05:42:36,499 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 145.6ms TimeCoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-05 05:42:36,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85092 states. [2021-06-05 05:42:38,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85092 to 84734. [2021-06-05 05:42:38,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84734 states, 84733 states have (on average 3.650643786954315) internal successors, (309330), 84733 states have internal predecessors, (309330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:42:38,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84734 states to 84734 states and 309330 transitions. [2021-06-05 05:42:38,394 INFO L78 Accepts]: Start accepts. Automaton has 84734 states and 309330 transitions. Word has length 25 [2021-06-05 05:42:38,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:42:38,394 INFO L482 AbstractCegarLoop]: Abstraction has 84734 states and 309330 transitions. [2021-06-05 05:42:38,394 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) [2021-06-05 05:42:38,394 INFO L276 IsEmpty]: Start isEmpty. Operand 84734 states and 309330 transitions. [2021-06-05 05:42:39,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 05:42:39,048 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:42:39,048 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:42:39,271 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable269 [2021-06-05 05:42:39,271 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:42:39,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:42:39,271 INFO L82 PathProgramCache]: Analyzing trace with hash -1461906909, now seen corresponding path program 99 times [2021-06-05 05:42:39,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:42:39,271 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272594019] [2021-06-05 05:42:39,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:42:39,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:42:39,348 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:42:39,348 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:42:39,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272594019] [2021-06-05 05:42:39,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [272594019] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:42:39,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [152044588] [2021-06-05 05:42:39,348 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:42:39,372 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 05:42:39,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:42:39,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 05:42:39,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:42:39,491 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:42:39,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [152044588] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:42:39,491 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:42:39,491 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 15 [2021-06-05 05:42:39,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587167951] [2021-06-05 05:42:39,491 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 05:42:39,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:42:39,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 05:42:39,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-06-05 05:42:39,492 INFO L87 Difference]: Start difference. First operand 84734 states and 309330 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:42:40,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:42:40,248 INFO L93 Difference]: Finished difference Result 87116 states and 316831 transitions. [2021-06-05 05:42:40,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 05:42:40,248 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 05:42:40,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:42:40,464 INFO L225 Difference]: With dead ends: 87116 [2021-06-05 05:42:40,464 INFO L226 Difference]: Without dead ends: 86937 [2021-06-05 05:42:40,464 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 272.9ms TimeCoverageRelationStatistics Valid=106, Invalid=446, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:42:40,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86937 states. [2021-06-05 05:42:42,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86937 to 84105. [2021-06-05 05:42:42,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84105 states, 84104 states have (on average 3.6505279178160372) internal successors, (307024), 84104 states have internal predecessors, (307024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:42:42,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84105 states to 84105 states and 307024 transitions. [2021-06-05 05:42:42,802 INFO L78 Accepts]: Start accepts. Automaton has 84105 states and 307024 transitions. Word has length 25 [2021-06-05 05:42:42,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:42:42,802 INFO L482 AbstractCegarLoop]: Abstraction has 84105 states and 307024 transitions. [2021-06-05 05:42:42,802 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:42:42,802 INFO L276 IsEmpty]: Start isEmpty. Operand 84105 states and 307024 transitions. [2021-06-05 05:42:42,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 05:42:42,929 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:42:42,929 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:42:43,129 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable270,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:42:43,130 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:42:43,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:42:43,130 INFO L82 PathProgramCache]: Analyzing trace with hash -426128515, now seen corresponding path program 100 times [2021-06-05 05:42:43,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:42:43,130 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159706979] [2021-06-05 05:42:43,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:42:43,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:42:43,210 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:42:43,211 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:42:43,211 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159706979] [2021-06-05 05:42:43,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159706979] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:42:43,211 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265858033] [2021-06-05 05:42:43,211 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 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:42:43,233 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:42:43,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:42:43,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 05:42:43,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:42:43,336 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:42:43,336 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [265858033] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:42:43,337 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:42:43,337 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 05:42:43,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482907834] [2021-06-05 05:42:43,337 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 05:42:43,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:42:43,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 05:42:43,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-06-05 05:42:43,337 INFO L87 Difference]: Start difference. First operand 84105 states and 307024 transitions. Second operand has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:42:43,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:42:43,908 INFO L93 Difference]: Finished difference Result 84705 states and 308613 transitions. [2021-06-05 05:42:43,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 05:42:43,908 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 05:42:43,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:42:44,118 INFO L225 Difference]: With dead ends: 84705 [2021-06-05 05:42:44,118 INFO L226 Difference]: Without dead ends: 84664 [2021-06-05 05:42:44,118 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 185.7ms TimeCoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:42:44,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84664 states. [2021-06-05 05:42:45,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84664 to 84321. [2021-06-05 05:42:46,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84321 states, 84320 states have (on average 3.6487073055028465) internal successors, (307659), 84320 states have internal predecessors, (307659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:42:46,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84321 states to 84321 states and 307659 transitions. [2021-06-05 05:42:46,279 INFO L78 Accepts]: Start accepts. Automaton has 84321 states and 307659 transitions. Word has length 25 [2021-06-05 05:42:46,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:42:46,279 INFO L482 AbstractCegarLoop]: Abstraction has 84321 states and 307659 transitions. [2021-06-05 05:42:46,279 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:42:46,279 INFO L276 IsEmpty]: Start isEmpty. Operand 84321 states and 307659 transitions. [2021-06-05 05:42:46,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 05:42:46,398 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:42:46,398 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:42:46,598 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable272,147 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:42:46,598 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:42:46,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:42:46,599 INFO L82 PathProgramCache]: Analyzing trace with hash -1484388057, now seen corresponding path program 101 times [2021-06-05 05:42:46,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:42:46,599 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45197461] [2021-06-05 05:42:46,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:42:46,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:42:46,697 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:42:46,697 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:42:46,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45197461] [2021-06-05 05:42:46,697 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45197461] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:42:46,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [906108219] [2021-06-05 05:42:46,698 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 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:42:46,722 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 05:42:46,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:42:46,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:42:46,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:42:46,842 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:42:46,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [906108219] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:42:46,842 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:42:46,842 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 05:42:46,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702622192] [2021-06-05 05:42:46,842 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 05:42:46,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:42:46,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 05:42:46,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-06-05 05:42:46,843 INFO L87 Difference]: Start difference. First operand 84321 states and 307659 transitions. Second operand has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:42:47,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:42:47,364 INFO L93 Difference]: Finished difference Result 84472 states and 308027 transitions. [2021-06-05 05:42:47,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 05:42:47,365 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 05:42:47,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:42:48,045 INFO L225 Difference]: With dead ends: 84472 [2021-06-05 05:42:48,046 INFO L226 Difference]: Without dead ends: 84409 [2021-06-05 05:42:48,046 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 223.7ms TimeCoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:42:48,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84409 states. [2021-06-05 05:42:49,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84409 to 84320. [2021-06-05 05:42:49,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84320 states, 84319 states have (on average 3.6487031392687297) internal successors, (307655), 84319 states have internal predecessors, (307655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:42:49,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84320 states to 84320 states and 307655 transitions. [2021-06-05 05:42:49,768 INFO L78 Accepts]: Start accepts. Automaton has 84320 states and 307655 transitions. Word has length 25 [2021-06-05 05:42:49,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:42:49,768 INFO L482 AbstractCegarLoop]: Abstraction has 84320 states and 307655 transitions. [2021-06-05 05:42:49,768 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:42:49,768 INFO L276 IsEmpty]: Start isEmpty. Operand 84320 states and 307655 transitions. [2021-06-05 05:42:49,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 05:42:49,882 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:42:49,882 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:42:50,082 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable273,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:42:50,082 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:42:50,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:42:50,083 INFO L82 PathProgramCache]: Analyzing trace with hash 1814796211, now seen corresponding path program 102 times [2021-06-05 05:42:50,083 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:42:50,083 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599990255] [2021-06-05 05:42:50,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:42:50,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:42:50,179 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:42:50,179 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:42:50,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599990255] [2021-06-05 05:42:50,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599990255] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:42:50,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [424080028] [2021-06-05 05:42:50,179 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:42:50,203 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:42:50,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:42:50,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:42:50,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:42:50,334 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:42:50,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [424080028] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:42:50,334 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:42:50,334 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 05:42:50,334 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174546047] [2021-06-05 05:42:50,334 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 05:42:50,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:42:50,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 05:42:50,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-06-05 05:42:50,335 INFO L87 Difference]: Start difference. First operand 84320 states and 307655 transitions. Second operand has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:42:51,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:42:51,454 INFO L93 Difference]: Finished difference Result 102467 states and 372249 transitions. [2021-06-05 05:42:51,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 05:42:51,455 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 05:42:51,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:42:51,742 INFO L225 Difference]: With dead ends: 102467 [2021-06-05 05:42:51,742 INFO L226 Difference]: Without dead ends: 102393 [2021-06-05 05:42:51,742 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 264.9ms TimeCoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:42:51,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102393 states. [2021-06-05 05:42:53,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102393 to 84329. [2021-06-05 05:42:53,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84329 states, 84328 states have (on average 3.648728773361161) internal successors, (307690), 84328 states have internal predecessors, (307690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:42:53,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84329 states to 84329 states and 307690 transitions. [2021-06-05 05:42:53,673 INFO L78 Accepts]: Start accepts. Automaton has 84329 states and 307690 transitions. Word has length 25 [2021-06-05 05:42:53,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:42:53,673 INFO L482 AbstractCegarLoop]: Abstraction has 84329 states and 307690 transitions. [2021-06-05 05:42:53,673 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:42:53,673 INFO L276 IsEmpty]: Start isEmpty. Operand 84329 states and 307690 transitions. [2021-06-05 05:42:53,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 05:42:53,791 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:42:53,791 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:42:53,991 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable274,149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:42:53,991 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:42:53,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:42:53,992 INFO L82 PathProgramCache]: Analyzing trace with hash 1015756207, now seen corresponding path program 103 times [2021-06-05 05:42:53,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:42:53,992 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447021582] [2021-06-05 05:42:53,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:42:53,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:42:54,092 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:42:54,092 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:42:54,092 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447021582] [2021-06-05 05:42:54,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447021582] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:42:54,092 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1252200199] [2021-06-05 05:42:54,092 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 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:42:54,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:42:54,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:42:54,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:42:54,700 WARN L205 SmtUtils]: Spent 422.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2021-06-05 05:42:54,742 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:42:54,742 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1252200199] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:42:54,742 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:42:54,742 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 05:42:54,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116391236] [2021-06-05 05:42:54,742 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:42:54,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:42:54,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:42:54,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:42:54,743 INFO L87 Difference]: Start difference. First operand 84329 states and 307690 transitions. Second operand has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:42:55,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:42:55,699 INFO L93 Difference]: Finished difference Result 114923 states and 419277 transitions. [2021-06-05 05:42:55,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 05:42:55,700 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 05:42:55,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:42:56,008 INFO L225 Difference]: With dead ends: 114923 [2021-06-05 05:42:56,008 INFO L226 Difference]: Without dead ends: 114877 [2021-06-05 05:42:56,009 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 867.1ms TimeCoverageRelationStatistics Valid=155, Invalid=495, Unknown=0, NotChecked=0, Total=650 [2021-06-05 05:42:56,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114877 states. [2021-06-05 05:42:58,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114877 to 84322. [2021-06-05 05:42:58,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84322 states, 84321 states have (on average 3.6487233310800393) internal successors, (307664), 84321 states have internal predecessors, (307664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:42:58,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84322 states to 84322 states and 307664 transitions. [2021-06-05 05:42:58,452 INFO L78 Accepts]: Start accepts. Automaton has 84322 states and 307664 transitions. Word has length 25 [2021-06-05 05:42:58,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:42:58,452 INFO L482 AbstractCegarLoop]: Abstraction has 84322 states and 307664 transitions. [2021-06-05 05:42:58,452 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:42:58,452 INFO L276 IsEmpty]: Start isEmpty. Operand 84322 states and 307664 transitions. [2021-06-05 05:42:58,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 05:42:58,575 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:42:58,575 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:42:58,775 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable277 [2021-06-05 05:42:58,776 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:42:58,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:42:58,776 INFO L82 PathProgramCache]: Analyzing trace with hash 777388195, now seen corresponding path program 104 times [2021-06-05 05:42:58,776 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:42:58,776 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148618178] [2021-06-05 05:42:58,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:42:58,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:42:58,869 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:42:58,869 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:42:58,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148618178] [2021-06-05 05:42:58,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148618178] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:42:58,870 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1474216526] [2021-06-05 05:42:58,870 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 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:42:58,892 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:42:58,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:42:58,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:42:58,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:42:58,998 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:42:58,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1474216526] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:42:58,999 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:42:58,999 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 05:42:58,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447861577] [2021-06-05 05:42:58,999 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 05:42:58,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:42:58,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 05:42:58,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-06-05 05:42:58,999 INFO L87 Difference]: Start difference. First operand 84322 states and 307664 transitions. Second operand has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:42:59,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:42:59,570 INFO L93 Difference]: Finished difference Result 84652 states and 308467 transitions. [2021-06-05 05:42:59,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 05:42:59,570 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 05:42:59,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:42:59,781 INFO L225 Difference]: With dead ends: 84652 [2021-06-05 05:42:59,781 INFO L226 Difference]: Without dead ends: 84561 [2021-06-05 05:42:59,781 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 188.8ms TimeCoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:43:00,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84561 states. [2021-06-05 05:43:01,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84561 to 84306. [2021-06-05 05:43:01,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84306 states, 84305 states have (on average 3.647316292034873) internal successors, (307487), 84305 states have internal predecessors, (307487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:43:01,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84306 states to 84306 states and 307487 transitions. [2021-06-05 05:43:01,873 INFO L78 Accepts]: Start accepts. Automaton has 84306 states and 307487 transitions. Word has length 25 [2021-06-05 05:43:01,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:43:01,873 INFO L482 AbstractCegarLoop]: Abstraction has 84306 states and 307487 transitions. [2021-06-05 05:43:01,873 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:43:01,873 INFO L276 IsEmpty]: Start isEmpty. Operand 84306 states and 307487 transitions. [2021-06-05 05:43:01,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 05:43:01,980 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:43:01,980 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:43:02,180 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable283,151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:43:02,180 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:43:02,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:43:02,181 INFO L82 PathProgramCache]: Analyzing trace with hash 664777499, now seen corresponding path program 105 times [2021-06-05 05:43:02,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:43:02,181 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207876254] [2021-06-05 05:43:02,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:43:02,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:43:02,287 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:43:02,287 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:43:02,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207876254] [2021-06-05 05:43:02,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207876254] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:43:02,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65087126] [2021-06-05 05:43:02,287 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 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:43:02,324 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:43:02,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:43:02,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:43:02,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:43:02,452 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:43:02,452 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [65087126] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:43:02,452 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:43:02,452 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-06-05 05:43:02,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451204405] [2021-06-05 05:43:02,453 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 05:43:02,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:43:02,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 05:43:02,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-06-05 05:43:02,453 INFO L87 Difference]: Start difference. First operand 84306 states and 307487 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) [2021-06-05 05:43:03,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:43:03,664 INFO L93 Difference]: Finished difference Result 103449 states and 375574 transitions. [2021-06-05 05:43:03,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 05:43:03,676 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 25 [2021-06-05 05:43:03,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:43:03,984 INFO L225 Difference]: With dead ends: 103449 [2021-06-05 05:43:03,984 INFO L226 Difference]: Without dead ends: 103317 [2021-06-05 05:43:03,984 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 252.6ms TimeCoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:43:04,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103317 states. [2021-06-05 05:43:05,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103317 to 85017. [2021-06-05 05:43:05,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85017 states, 85016 states have (on average 3.644808036134375) internal successors, (309867), 85016 states have internal predecessors, (309867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:43:05,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85017 states to 85017 states and 309867 transitions. [2021-06-05 05:43:05,997 INFO L78 Accepts]: Start accepts. Automaton has 85017 states and 309867 transitions. Word has length 25 [2021-06-05 05:43:05,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:43:05,997 INFO L482 AbstractCegarLoop]: Abstraction has 85017 states and 309867 transitions. [2021-06-05 05:43:05,997 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) [2021-06-05 05:43:05,997 INFO L276 IsEmpty]: Start isEmpty. Operand 85017 states and 309867 transitions. [2021-06-05 05:43:06,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 05:43:06,131 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:43:06,131 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:43:06,331 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable284,152 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:43:06,332 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:43:06,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:43:06,332 INFO L82 PathProgramCache]: Analyzing trace with hash -134262505, now seen corresponding path program 106 times [2021-06-05 05:43:06,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:43:06,332 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306596024] [2021-06-05 05:43:06,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:43:06,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:43:06,461 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:43:06,462 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:43:06,462 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306596024] [2021-06-05 05:43:06,462 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306596024] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:43:06,462 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484839500] [2021-06-05 05:43:06,462 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 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:43:06,490 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:43:06,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:43:06,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:43:06,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:43:06,633 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:43:06,634 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [484839500] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:43:06,634 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:43:06,634 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-06-05 05:43:06,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766704641] [2021-06-05 05:43:06,634 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 05:43:06,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:43:06,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 05:43:06,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-06-05 05:43:06,634 INFO L87 Difference]: Start difference. First operand 85017 states and 309867 transitions. Second operand has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:43:07,158 WARN L205 SmtUtils]: Spent 453.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2021-06-05 05:43:08,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:43:08,019 INFO L93 Difference]: Finished difference Result 116231 states and 423805 transitions. [2021-06-05 05:43:08,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 05:43:08,020 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 05:43:08,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:43:08,383 INFO L225 Difference]: With dead ends: 116231 [2021-06-05 05:43:08,383 INFO L226 Difference]: Without dead ends: 116185 [2021-06-05 05:43:08,383 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 852.3ms TimeCoverageRelationStatistics Valid=148, Invalid=404, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:43:08,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116185 states. [2021-06-05 05:43:10,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116185 to 85004. [2021-06-05 05:43:10,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85004 states, 85003 states have (on average 3.644706657412091) internal successors, (309811), 85003 states have internal predecessors, (309811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:43:10,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85004 states to 85004 states and 309811 transitions. [2021-06-05 05:43:10,902 INFO L78 Accepts]: Start accepts. Automaton has 85004 states and 309811 transitions. Word has length 25 [2021-06-05 05:43:10,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:43:10,902 INFO L482 AbstractCegarLoop]: Abstraction has 85004 states and 309811 transitions. [2021-06-05 05:43:10,903 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:43:10,903 INFO L276 IsEmpty]: Start isEmpty. Operand 85004 states and 309811 transitions. [2021-06-05 05:43:11,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 05:43:11,022 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:43:11,022 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:43:11,223 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable287 [2021-06-05 05:43:11,223 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:43:11,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:43:11,223 INFO L82 PathProgramCache]: Analyzing trace with hash -394386371, now seen corresponding path program 107 times [2021-06-05 05:43:11,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:43:11,223 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672730459] [2021-06-05 05:43:11,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:43:11,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:43:11,317 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:43:11,317 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:43:11,317 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672730459] [2021-06-05 05:43:11,317 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672730459] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:43:11,317 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2115750269] [2021-06-05 05:43:11,317 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 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:43:11,340 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:43:11,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:43:11,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:43:11,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:43:11,424 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:43:11,424 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2115750269] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:43:11,424 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:43:11,424 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 12 [2021-06-05 05:43:11,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866032791] [2021-06-05 05:43:11,425 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 05:43:11,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:43:11,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 05:43:11,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 05:43:11,425 INFO L87 Difference]: Start difference. First operand 85004 states and 309811 transitions. Second operand has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:43:11,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:43:11,940 INFO L93 Difference]: Finished difference Result 85225 states and 310318 transitions. [2021-06-05 05:43:11,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 05:43:11,940 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 05:43:11,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:43:12,673 INFO L225 Difference]: With dead ends: 85225 [2021-06-05 05:43:12,674 INFO L226 Difference]: Without dead ends: 85188 [2021-06-05 05:43:12,674 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 145.7ms TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-06-05 05:43:12,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85188 states. [2021-06-05 05:43:13,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85188 to 84839. [2021-06-05 05:43:14,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84839 states, 84838 states have (on average 3.645795516160211) internal successors, (309302), 84838 states have internal predecessors, (309302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:43:14,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84839 states to 84839 states and 309302 transitions. [2021-06-05 05:43:14,338 INFO L78 Accepts]: Start accepts. Automaton has 84839 states and 309302 transitions. Word has length 25 [2021-06-05 05:43:14,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:43:14,338 INFO L482 AbstractCegarLoop]: Abstraction has 84839 states and 309302 transitions. [2021-06-05 05:43:14,339 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:43:14,339 INFO L276 IsEmpty]: Start isEmpty. Operand 84839 states and 309302 transitions. [2021-06-05 05:43:14,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 05:43:14,467 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:43:14,467 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:43:14,668 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable293,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:43:14,668 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:43:14,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:43:14,668 INFO L82 PathProgramCache]: Analyzing trace with hash -372630517, now seen corresponding path program 108 times [2021-06-05 05:43:14,668 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:43:14,668 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142061712] [2021-06-05 05:43:14,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:43:14,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:43:14,758 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:43:14,758 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:43:14,758 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142061712] [2021-06-05 05:43:14,758 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142061712] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:43:14,758 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2025854836] [2021-06-05 05:43:14,758 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 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:43:14,781 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:43:14,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:43:14,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:43:14,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:43:14,860 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:43:14,860 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2025854836] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:43:14,860 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:43:14,861 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 12 [2021-06-05 05:43:14,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116220649] [2021-06-05 05:43:14,861 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 05:43:14,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:43:14,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 05:43:14,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-06-05 05:43:14,861 INFO L87 Difference]: Start difference. First operand 84839 states and 309302 transitions. Second operand has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:43:15,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:43:15,811 INFO L93 Difference]: Finished difference Result 84942 states and 309502 transitions. [2021-06-05 05:43:15,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 05:43:15,811 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 05:43:15,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:43:16,074 INFO L225 Difference]: With dead ends: 84942 [2021-06-05 05:43:16,075 INFO L226 Difference]: Without dead ends: 84847 [2021-06-05 05:43:16,075 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 147.6ms TimeCoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-06-05 05:43:16,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84847 states. [2021-06-05 05:43:17,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84847 to 84780. [2021-06-05 05:43:17,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84780 states, 84779 states have (on average 3.643850481841022) internal successors, (308922), 84779 states have internal predecessors, (308922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:43:17,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84780 states to 84780 states and 308922 transitions. [2021-06-05 05:43:17,816 INFO L78 Accepts]: Start accepts. Automaton has 84780 states and 308922 transitions. Word has length 25 [2021-06-05 05:43:17,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:43:17,816 INFO L482 AbstractCegarLoop]: Abstraction has 84780 states and 308922 transitions. [2021-06-05 05:43:17,816 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:43:17,816 INFO L276 IsEmpty]: Start isEmpty. Operand 84780 states and 308922 transitions. [2021-06-05 05:43:17,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 05:43:17,935 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:43:17,935 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:43:18,135 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable294,155 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:43:18,135 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:43:18,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:43:18,136 INFO L82 PathProgramCache]: Analyzing trace with hash 445651607, now seen corresponding path program 109 times [2021-06-05 05:43:18,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:43:18,136 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899577204] [2021-06-05 05:43:18,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:43:18,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:43:18,218 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:43:18,218 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:43:18,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899577204] [2021-06-05 05:43:18,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [899577204] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:43:18,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [976984644] [2021-06-05 05:43:18,218 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 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:43:18,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:43:18,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:43:18,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:43:18,398 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:43:18,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [976984644] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:43:18,398 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:43:18,398 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 05:43:18,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766992784] [2021-06-05 05:43:18,399 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 05:43:18,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:43:18,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 05:43:18,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:43:18,399 INFO L87 Difference]: Start difference. First operand 84780 states and 308922 transitions. Second operand has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:43:19,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:43:19,706 INFO L93 Difference]: Finished difference Result 98741 states and 357653 transitions. [2021-06-05 05:43:19,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 05:43:19,706 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 05:43:19,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:43:19,976 INFO L225 Difference]: With dead ends: 98741 [2021-06-05 05:43:19,976 INFO L226 Difference]: Without dead ends: 98669 [2021-06-05 05:43:19,976 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 306.6ms TimeCoverageRelationStatistics Valid=145, Invalid=557, Unknown=0, NotChecked=0, Total=702 [2021-06-05 05:43:20,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98669 states. [2021-06-05 05:43:21,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98669 to 86019. [2021-06-05 05:43:21,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86019 states, 86018 states have (on average 3.643783859192262) internal successors, (313431), 86018 states have internal predecessors, (313431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:43:21,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86019 states to 86019 states and 313431 transitions. [2021-06-05 05:43:21,996 INFO L78 Accepts]: Start accepts. Automaton has 86019 states and 313431 transitions. Word has length 25 [2021-06-05 05:43:21,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:43:21,996 INFO L482 AbstractCegarLoop]: Abstraction has 86019 states and 313431 transitions. [2021-06-05 05:43:21,996 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:43:21,996 INFO L276 IsEmpty]: Start isEmpty. Operand 86019 states and 313431 transitions. [2021-06-05 05:43:22,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 05:43:22,578 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:43:22,578 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:43:22,778 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable295,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:43:22,779 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:43:22,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:43:22,779 INFO L82 PathProgramCache]: Analyzing trace with hash -743631491, now seen corresponding path program 110 times [2021-06-05 05:43:22,779 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:43:22,779 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226364010] [2021-06-05 05:43:22,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:43:22,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:43:22,861 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:43:22,862 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:43:22,862 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226364010] [2021-06-05 05:43:22,862 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226364010] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:43:22,862 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243518252] [2021-06-05 05:43:22,862 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 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:43:22,885 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:43:22,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:43:22,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:43:22,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:43:22,987 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:43:22,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1243518252] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:43:22,987 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:43:22,987 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 05:43:22,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574773236] [2021-06-05 05:43:22,987 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 05:43:22,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:43:22,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 05:43:22,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-06-05 05:43:22,988 INFO L87 Difference]: Start difference. First operand 86019 states and 313431 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:43:23,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:43:23,550 INFO L93 Difference]: Finished difference Result 86639 states and 315121 transitions. [2021-06-05 05:43:23,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 05:43:23,550 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 05:43:23,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:43:23,760 INFO L225 Difference]: With dead ends: 86639 [2021-06-05 05:43:23,761 INFO L226 Difference]: Without dead ends: 86578 [2021-06-05 05:43:23,761 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 139.2ms TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-06-05 05:43:23,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86578 states. [2021-06-05 05:43:25,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86578 to 86023. [2021-06-05 05:43:25,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86023 states, 86022 states have (on average 3.6426960544976867) internal successors, (313352), 86022 states have internal predecessors, (313352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:43:26,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86023 states to 86023 states and 313352 transitions. [2021-06-05 05:43:26,128 INFO L78 Accepts]: Start accepts. Automaton has 86023 states and 313352 transitions. Word has length 25 [2021-06-05 05:43:26,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:43:26,128 INFO L482 AbstractCegarLoop]: Abstraction has 86023 states and 313352 transitions. [2021-06-05 05:43:26,128 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:43:26,128 INFO L276 IsEmpty]: Start isEmpty. Operand 86023 states and 313352 transitions. [2021-06-05 05:43:26,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 05:43:26,262 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:43:26,262 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:43:26,462 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable300 [2021-06-05 05:43:26,463 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:43:26,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:43:26,463 INFO L82 PathProgramCache]: Analyzing trace with hash -1565279795, now seen corresponding path program 25 times [2021-06-05 05:43:26,463 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:43:26,463 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553216442] [2021-06-05 05:43:26,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:43:26,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:43:26,496 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:43:26,496 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:43:26,496 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553216442] [2021-06-05 05:43:26,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553216442] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:43:26,496 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1633739408] [2021-06-05 05:43:26,496 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:43:26,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:43:26,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 05:43:26,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:43:26,586 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:43:26,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1633739408] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:43:26,587 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:43:26,587 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 05:43:26,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819654689] [2021-06-05 05:43:26,587 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 05:43:26,587 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:43:26,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 05:43:26,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-06-05 05:43:26,587 INFO L87 Difference]: Start difference. First operand 86023 states and 313352 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:43:27,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:43:27,494 INFO L93 Difference]: Finished difference Result 182520 states and 664068 transitions. [2021-06-05 05:43:27,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 05:43:27,494 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 05:43:27,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:43:28,925 INFO L225 Difference]: With dead ends: 182520 [2021-06-05 05:43:28,925 INFO L226 Difference]: Without dead ends: 182506 [2021-06-05 05:43:28,925 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 97.5ms TimeCoverageRelationStatistics Valid=99, Invalid=173, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:43:29,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182506 states. [2021-06-05 05:43:32,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182506 to 178615. [2021-06-05 05:43:32,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178615 states, 178614 states have (on average 3.650077821447367) internal successors, (651955), 178614 states have internal predecessors, (651955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:43:33,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178615 states to 178615 states and 651955 transitions. [2021-06-05 05:43:33,662 INFO L78 Accepts]: Start accepts. Automaton has 178615 states and 651955 transitions. Word has length 25 [2021-06-05 05:43:33,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:43:33,663 INFO L482 AbstractCegarLoop]: Abstraction has 178615 states and 651955 transitions. [2021-06-05 05:43:33,663 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:43:33,663 INFO L276 IsEmpty]: Start isEmpty. Operand 178615 states and 651955 transitions. [2021-06-05 05:43:33,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 05:43:33,945 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:43:33,945 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:43:34,146 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 158 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable301 [2021-06-05 05:43:34,146 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:43:34,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:43:34,146 INFO L82 PathProgramCache]: Analyzing trace with hash -1079475691, now seen corresponding path program 26 times [2021-06-05 05:43:34,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:43:34,146 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51618180] [2021-06-05 05:43:34,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:43:34,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:43:34,199 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:43:34,199 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:43:34,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51618180] [2021-06-05 05:43:34,200 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51618180] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:43:34,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [288107072] [2021-06-05 05:43:34,200 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 [2021-06-05 05:43:34,228 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:43:34,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:43:34,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 05:43:34,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:43:34,289 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:43:34,289 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [288107072] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:43:34,289 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:43:34,289 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 05:43:34,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957467186] [2021-06-05 05:43:34,289 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 05:43:34,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:43:34,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 05:43:34,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-06-05 05:43:34,290 INFO L87 Difference]: Start difference. First operand 178615 states and 651955 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:43:36,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:43:36,669 INFO L93 Difference]: Finished difference Result 310258 states and 1130711 transitions. [2021-06-05 05:43:36,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 05:43:36,672 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 05:43:36,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:43:37,784 INFO L225 Difference]: With dead ends: 310258 [2021-06-05 05:43:37,784 INFO L226 Difference]: Without dead ends: 310258 [2021-06-05 05:43:37,784 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 101.1ms TimeCoverageRelationStatistics Valid=93, Invalid=213, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:43:38,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310258 states. [2021-06-05 05:43:44,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310258 to 307681. [2021-06-05 05:43:44,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307681 states, 307680 states have (on average 3.6506727769110765) internal successors, (1123239), 307680 states have internal predecessors, (1123239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:43:46,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307681 states to 307681 states and 1123239 transitions. [2021-06-05 05:43:46,539 INFO L78 Accepts]: Start accepts. Automaton has 307681 states and 1123239 transitions. Word has length 25 [2021-06-05 05:43:46,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:43:46,539 INFO L482 AbstractCegarLoop]: Abstraction has 307681 states and 1123239 transitions. [2021-06-05 05:43:46,539 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:43:46,539 INFO L276 IsEmpty]: Start isEmpty. Operand 307681 states and 1123239 transitions. [2021-06-05 05:43:46,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 05:43:46,870 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:43:46,870 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:43:47,071 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable302 [2021-06-05 05:43:47,071 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:43:47,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:43:47,071 INFO L82 PathProgramCache]: Analyzing trace with hash -373421423, now seen corresponding path program 27 times [2021-06-05 05:43:47,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:43:47,071 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2926098] [2021-06-05 05:43:47,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:43:47,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:43:47,105 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:43:47,105 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:43:47,105 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2926098] [2021-06-05 05:43:47,105 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2926098] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:43:47,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1864318856] [2021-06-05 05:43:47,106 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 [2021-06-05 05:43:47,145 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:43:47,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:43:47,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 05:43:47,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:43:47,196 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:43:47,196 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1864318856] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:43:47,196 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:43:47,196 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-06-05 05:43:47,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277319863] [2021-06-05 05:43:47,197 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 05:43:47,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:43:47,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 05:43:47,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-06-05 05:43:47,197 INFO L87 Difference]: Start difference. First operand 307681 states and 1123239 transitions. Second operand has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:43:49,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:43:49,492 INFO L93 Difference]: Finished difference Result 315768 states and 1151589 transitions. [2021-06-05 05:43:49,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 05:43:49,492 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 05:43:49,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:43:51,160 INFO L225 Difference]: With dead ends: 315768 [2021-06-05 05:43:51,160 INFO L226 Difference]: Without dead ends: 315768 [2021-06-05 05:43:51,160 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 79.2ms TimeCoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2021-06-05 05:43:51,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315768 states. [2021-06-05 05:43:56,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315768 to 307781. [2021-06-05 05:43:57,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307781 states, 307780 states have (on average 3.6506400675807393) internal successors, (1123594), 307780 states have internal predecessors, (1123594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:43:59,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307781 states to 307781 states and 1123594 transitions. [2021-06-05 05:43:59,198 INFO L78 Accepts]: Start accepts. Automaton has 307781 states and 1123594 transitions. Word has length 25 [2021-06-05 05:43:59,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:43:59,198 INFO L482 AbstractCegarLoop]: Abstraction has 307781 states and 1123594 transitions. [2021-06-05 05:43:59,198 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:43:59,199 INFO L276 IsEmpty]: Start isEmpty. Operand 307781 states and 1123594 transitions. [2021-06-05 05:43:59,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 05:43:59,490 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:43:59,490 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:43:59,690 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable303,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:43:59,690 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:43:59,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:43:59,691 INFO L82 PathProgramCache]: Analyzing trace with hash 1675135705, now seen corresponding path program 28 times [2021-06-05 05:43:59,691 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:43:59,691 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604972851] [2021-06-05 05:43:59,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:43:59,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:43:59,727 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:43:59,728 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:43:59,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604972851] [2021-06-05 05:43:59,728 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604972851] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:43:59,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99514758] [2021-06-05 05:43:59,728 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 [2021-06-05 05:43:59,750 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:43:59,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:43:59,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 05:43:59,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:43:59,802 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:43:59,802 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [99514758] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:43:59,802 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:43:59,802 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 05:43:59,802 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469572254] [2021-06-05 05:43:59,802 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 05:43:59,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:43:59,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 05:43:59,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-06-05 05:43:59,803 INFO L87 Difference]: Start difference. First operand 307781 states and 1123594 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:44:03,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:44:03,265 INFO L93 Difference]: Finished difference Result 404675 states and 1471493 transitions. [2021-06-05 05:44:03,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 05:44:03,265 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 05:44:03,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:44:04,759 INFO L225 Difference]: With dead ends: 404675 [2021-06-05 05:44:04,759 INFO L226 Difference]: Without dead ends: 404675 [2021-06-05 05:44:04,759 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 71.2ms TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2021-06-05 05:44:05,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404675 states. [2021-06-05 05:44:12,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404675 to 328058. [2021-06-05 05:44:12,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328058 states, 328057 states have (on average 3.6505454844737346) internal successors, (1197587), 328057 states have internal predecessors, (1197587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:44:14,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328058 states to 328058 states and 1197587 transitions. [2021-06-05 05:44:14,187 INFO L78 Accepts]: Start accepts. Automaton has 328058 states and 1197587 transitions. Word has length 25 [2021-06-05 05:44:14,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:44:14,187 INFO L482 AbstractCegarLoop]: Abstraction has 328058 states and 1197587 transitions. [2021-06-05 05:44:14,187 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:44:14,187 INFO L276 IsEmpty]: Start isEmpty. Operand 328058 states and 1197587 transitions. [2021-06-05 05:44:15,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 05:44:15,500 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:44:15,500 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:44:15,700 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable304 [2021-06-05 05:44:15,700 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:44:15,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:44:15,700 INFO L82 PathProgramCache]: Analyzing trace with hash 910634069, now seen corresponding path program 29 times [2021-06-05 05:44:15,700 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:44:15,701 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518049018] [2021-06-05 05:44:15,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:44:15,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:44:15,737 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:44:15,737 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:44:15,737 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518049018] [2021-06-05 05:44:15,737 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518049018] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:44:15,737 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [28917946] [2021-06-05 05:44:15,737 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 [2021-06-05 05:44:15,761 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 05:44:15,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:44:15,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 05:44:15,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:44:15,815 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:44:15,815 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [28917946] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:44:15,815 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:44:15,815 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 05:44:15,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645601238] [2021-06-05 05:44:15,816 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 05:44:15,816 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:44:15,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 05:44:15,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-06-05 05:44:15,816 INFO L87 Difference]: Start difference. First operand 328058 states and 1197587 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:44:20,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:44:20,432 INFO L93 Difference]: Finished difference Result 638146 states and 2324169 transitions. [2021-06-05 05:44:20,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 05:44:20,432 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 05:44:20,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:44:24,954 INFO L225 Difference]: With dead ends: 638146 [2021-06-05 05:44:24,955 INFO L226 Difference]: Without dead ends: 638146 [2021-06-05 05:44:24,955 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 107.0ms TimeCoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:44:26,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 638146 states. [2021-06-05 05:44:39,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 638146 to 633057. [2021-06-05 05:44:40,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 633057 states, 633056 states have (on average 3.6415419804882982) internal successors, (2305300), 633056 states have internal predecessors, (2305300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:44:44,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 633057 states to 633057 states and 2305300 transitions. [2021-06-05 05:44:44,066 INFO L78 Accepts]: Start accepts. Automaton has 633057 states and 2305300 transitions. Word has length 25 [2021-06-05 05:44:44,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:44:44,066 INFO L482 AbstractCegarLoop]: Abstraction has 633057 states and 2305300 transitions. [2021-06-05 05:44:44,066 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:44:44,066 INFO L276 IsEmpty]: Start isEmpty. Operand 633057 states and 2305300 transitions. [2021-06-05 05:44:45,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 05:44:45,389 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:44:45,389 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:44:45,592 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable305,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:44:45,593 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:44:45,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:44:45,593 INFO L82 PathProgramCache]: Analyzing trace with hash 1396438173, now seen corresponding path program 30 times [2021-06-05 05:44:45,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:44:45,593 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772615093] [2021-06-05 05:44:45,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:44:45,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:44:45,628 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:44:45,629 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:44:45,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772615093] [2021-06-05 05:44:45,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772615093] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:44:45,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1855539740] [2021-06-05 05:44:45,629 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 [2021-06-05 05:44:45,652 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 05:44:45,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:44:45,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 05:44:45,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:44:45,701 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:44:45,701 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1855539740] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:44:45,701 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:44:45,701 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 05:44:45,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235055482] [2021-06-05 05:44:45,701 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 05:44:45,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:44:45,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 05:44:45,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-06-05 05:44:45,701 INFO L87 Difference]: Start difference. First operand 633057 states and 2305300 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:44:51,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:44:51,071 INFO L93 Difference]: Finished difference Result 745515 states and 2707335 transitions. [2021-06-05 05:44:51,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 05:44:51,072 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 05:44:51,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:44:54,719 INFO L225 Difference]: With dead ends: 745515 [2021-06-05 05:44:54,719 INFO L226 Difference]: Without dead ends: 745515 [2021-06-05 05:44:54,719 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 91.2ms TimeCoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:44:56,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 745515 states. [2021-06-05 05:45:10,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 745515 to 684267. [2021-06-05 05:45:11,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 684267 states, 684266 states have (on average 3.6362379542458636) internal successors, (2488154), 684266 states have internal predecessors, (2488154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:45:17,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 684267 states to 684267 states and 2488154 transitions. [2021-06-05 05:45:17,536 INFO L78 Accepts]: Start accepts. Automaton has 684267 states and 2488154 transitions. Word has length 25 [2021-06-05 05:45:17,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:45:17,536 INFO L482 AbstractCegarLoop]: Abstraction has 684267 states and 2488154 transitions. [2021-06-05 05:45:17,536 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:45:17,536 INFO L276 IsEmpty]: Start isEmpty. Operand 684267 states and 2488154 transitions. [2021-06-05 05:45:19,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 05:45:19,461 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:45:19,461 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:45:19,680 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable306,163 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:45:19,681 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:45:19,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:45:19,681 INFO L82 PathProgramCache]: Analyzing trace with hash 759971319, now seen corresponding path program 31 times [2021-06-05 05:45:19,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:45:19,681 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106224185] [2021-06-05 05:45:19,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:45:19,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:45:19,743 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:45:19,743 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:45:19,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106224185] [2021-06-05 05:45:19,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106224185] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:45:19,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261884462] [2021-06-05 05:45:19,744 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 [2021-06-05 05:45:19,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:45:19,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 05:45:19,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:45:19,826 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:45:19,826 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1261884462] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:45:19,826 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:45:19,826 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-06-05 05:45:19,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231055225] [2021-06-05 05:45:19,826 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 05:45:19,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:45:19,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 05:45:19,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-06-05 05:45:19,827 INFO L87 Difference]: Start difference. First operand 684267 states and 2488154 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:45:27,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:45:27,256 INFO L93 Difference]: Finished difference Result 688116 states and 2501277 transitions. [2021-06-05 05:45:27,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 05:45:27,256 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 05:45:27,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:45:32,638 INFO L225 Difference]: With dead ends: 688116 [2021-06-05 05:45:32,639 INFO L226 Difference]: Without dead ends: 688116 [2021-06-05 05:45:32,639 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 79.6ms TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-06-05 05:45:33,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 688116 states. [2021-06-05 05:45:49,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 688116 to 684289. [2021-06-05 05:45:51,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 684289 states, 684288 states have (on average 3.6362189604377106) internal successors, (2488221), 684288 states have internal predecessors, (2488221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:45:58,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 684289 states to 684289 states and 2488221 transitions. [2021-06-05 05:45:58,545 INFO L78 Accepts]: Start accepts. Automaton has 684289 states and 2488221 transitions. Word has length 25 [2021-06-05 05:45:58,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:45:58,560 INFO L482 AbstractCegarLoop]: Abstraction has 684289 states and 2488221 transitions. [2021-06-05 05:45:58,561 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:45:58,561 INFO L276 IsEmpty]: Start isEmpty. Operand 684289 states and 2488221 transitions. [2021-06-05 05:45:59,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 05:45:59,723 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:45:59,724 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:45:59,941 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable307 [2021-06-05 05:45:59,941 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:45:59,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:45:59,941 INFO L82 PathProgramCache]: Analyzing trace with hash -326436511, now seen corresponding path program 111 times [2021-06-05 05:45:59,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:45:59,941 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900701533] [2021-06-05 05:45:59,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:45:59,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:46:00,021 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:46:00,021 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:46:00,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900701533] [2021-06-05 05:46:00,021 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1900701533] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:46:00,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313176434] [2021-06-05 05:46:00,022 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:46:00,049 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 05:46:00,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:46:00,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 05:46:00,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:46:00,151 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:46:00,152 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [313176434] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:46:00,152 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:46:00,152 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 05:46:00,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415035025] [2021-06-05 05:46:00,152 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 05:46:00,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:46:00,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 05:46:00,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-06-05 05:46:00,153 INFO L87 Difference]: Start difference. First operand 684289 states and 2488221 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:46:07,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:46:07,892 INFO L93 Difference]: Finished difference Result 687113 states and 2497284 transitions. [2021-06-05 05:46:07,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 05:46:07,892 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 05:46:07,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:46:10,494 INFO L225 Difference]: With dead ends: 687113 [2021-06-05 05:46:10,495 INFO L226 Difference]: Without dead ends: 687038 [2021-06-05 05:46:10,495 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 207.6ms TimeCoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:46:12,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 687038 states. [2021-06-05 05:46:29,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 687038 to 684882. [2021-06-05 05:46:30,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 684882 states, 684881 states have (on average 3.6360594030203788) internal successors, (2490268), 684881 states have internal predecessors, (2490268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:46:35,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 684882 states to 684882 states and 2490268 transitions. [2021-06-05 05:46:35,510 INFO L78 Accepts]: Start accepts. Automaton has 684882 states and 2490268 transitions. Word has length 25 [2021-06-05 05:46:35,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:46:35,511 INFO L482 AbstractCegarLoop]: Abstraction has 684882 states and 2490268 transitions. [2021-06-05 05:46:35,511 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:46:35,511 INFO L276 IsEmpty]: Start isEmpty. Operand 684882 states and 2490268 transitions. [2021-06-05 05:46:36,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 05:46:36,138 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:46:36,138 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:46:36,338 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable308,165 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:46:36,338 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:46:36,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:46:36,339 INFO L82 PathProgramCache]: Analyzing trace with hash -1241517999, now seen corresponding path program 112 times [2021-06-05 05:46:36,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:46:36,340 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229004722] [2021-06-05 05:46:36,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:46:36,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:46:36,413 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:46:36,413 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:46:36,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229004722] [2021-06-05 05:46:36,413 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229004722] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:46:36,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [152976585] [2021-06-05 05:46:36,413 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:46:36,441 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:46:36,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:46:36,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 05:46:36,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:46:36,544 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:46:36,545 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [152976585] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:46:36,545 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:46:36,545 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 05:46:36,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29367537] [2021-06-05 05:46:36,545 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 05:46:36,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:46:36,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 05:46:36,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-05 05:46:36,545 INFO L87 Difference]: Start difference. First operand 684882 states and 2490268 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:46:42,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:46:42,800 INFO L93 Difference]: Finished difference Result 690033 states and 2507264 transitions. [2021-06-05 05:46:42,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 05:46:42,800 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 05:46:42,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:46:45,337 INFO L225 Difference]: With dead ends: 690033 [2021-06-05 05:46:45,337 INFO L226 Difference]: Without dead ends: 690008 [2021-06-05 05:46:45,337 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 302.8ms TimeCoverageRelationStatistics Valid=117, Invalid=435, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:46:46,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 690008 states. [2021-06-05 05:47:04,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 690008 to 685088. [2021-06-05 05:47:05,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 685088 states, 685087 states have (on average 3.6364344966405726) internal successors, (2491274), 685087 states have internal predecessors, (2491274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:47:10,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 685088 states to 685088 states and 2491274 transitions. [2021-06-05 05:47:10,528 INFO L78 Accepts]: Start accepts. Automaton has 685088 states and 2491274 transitions. Word has length 25 [2021-06-05 05:47:10,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:47:10,528 INFO L482 AbstractCegarLoop]: Abstraction has 685088 states and 2491274 transitions. [2021-06-05 05:47:10,528 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:47:10,528 INFO L276 IsEmpty]: Start isEmpty. Operand 685088 states and 2491274 transitions. [2021-06-05 05:47:11,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 05:47:11,152 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:47:11,152 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:47:11,352 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable311,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:47:11,352 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:47:11,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:47:11,352 INFO L82 PathProgramCache]: Analyzing trace with hash 2103761757, now seen corresponding path program 113 times [2021-06-05 05:47:11,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:47:11,353 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603040151] [2021-06-05 05:47:11,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:47:11,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:47:11,398 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:47:11,399 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:47:11,399 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603040151] [2021-06-05 05:47:11,399 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1603040151] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:47:11,399 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [314686246] [2021-06-05 05:47:11,399 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:47:11,421 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 05:47:11,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:47:11,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 05:47:11,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:47:11,496 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:47:11,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [314686246] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:47:11,497 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:47:11,497 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 10 [2021-06-05 05:47:11,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705916323] [2021-06-05 05:47:11,497 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 05:47:11,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:47:11,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 05:47:11,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-06-05 05:47:11,497 INFO L87 Difference]: Start difference. First operand 685088 states and 2491274 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:47:20,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:47:20,607 INFO L93 Difference]: Finished difference Result 1083545 states and 3960729 transitions. [2021-06-05 05:47:20,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 05:47:20,607 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 05:47:20,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:47:29,222 INFO L225 Difference]: With dead ends: 1083545 [2021-06-05 05:47:29,222 INFO L226 Difference]: Without dead ends: 1083519 [2021-06-05 05:47:29,222 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 119.6ms TimeCoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:47:31,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1083519 states. [2021-06-05 05:47:53,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1083519 to 953614. [2021-06-05 05:47:55,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 953614 states, 953613 states have (on average 3.6471136614119146) internal successors, (3477935), 953613 states have internal predecessors, (3477935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Received shutdown request... [2021-06-05 05:47:58,737 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable315 [2021-06-05 05:47:58,737 WARN L547 AbstractCegarLoop]: Verification canceled [2021-06-05 05:47:58,739 INFO L246 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-05 05:47:58,740 WARN L196 ceAbstractionStarter]: Timeout [2021-06-05 05:47:58,741 INFO L202 PluginConnector]: Adding new model mult-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.06 05:47:58 BasicIcfg [2021-06-05 05:47:58,741 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-05 05:47:58,741 INFO L168 Benchmark]: Toolchain (without parser) took 614130.96 ms. Allocated memory was 360.7 MB in the beginning and 16.0 GB in the end (delta: 15.6 GB). Free memory was 340.3 MB in the beginning and 8.8 GB in the end (delta: -8.5 GB). Peak memory consumption was 8.4 GB. Max. memory is 16.0 GB. [2021-06-05 05:47:58,741 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.15 ms. Allocated memory is still 360.7 MB. Free memory is still 341.5 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 05:47:58,741 INFO L168 Benchmark]: Boogie Procedure Inliner took 28.08 ms. Allocated memory is still 360.7 MB. Free memory was 340.3 MB in the beginning and 338.9 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-05 05:47:58,741 INFO L168 Benchmark]: Boogie Preprocessor took 14.67 ms. Allocated memory is still 360.7 MB. Free memory was 338.9 MB in the beginning and 337.9 MB in the end (delta: 999.2 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-05 05:47:58,741 INFO L168 Benchmark]: RCFGBuilder took 243.81 ms. Allocated memory is still 360.7 MB. Free memory was 337.9 MB in the beginning and 325.7 MB in the end (delta: 12.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.0 GB. [2021-06-05 05:47:58,741 INFO L168 Benchmark]: TraceAbstraction took 613839.65 ms. Allocated memory was 360.7 MB in the beginning and 16.0 GB in the end (delta: 15.6 GB). Free memory was 325.3 MB in the beginning and 8.8 GB in the end (delta: -8.5 GB). Peak memory consumption was 8.4 GB. Max. memory is 16.0 GB. [2021-06-05 05:47:58,742 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 0.15 ms. Allocated memory is still 360.7 MB. Free memory is still 341.5 MB. There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 28.08 ms. Allocated memory is still 360.7 MB. Free memory was 340.3 MB in the beginning and 338.9 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 14.67 ms. Allocated memory is still 360.7 MB. Free memory was 338.9 MB in the beginning and 337.9 MB in the end (delta: 999.2 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 243.81 ms. Allocated memory is still 360.7 MB. Free memory was 337.9 MB in the beginning and 325.7 MB in the end (delta: 12.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.0 GB. * TraceAbstraction took 613839.65 ms. Allocated memory was 360.7 MB in the beginning and 16.0 GB in the end (delta: 15.6 GB). Free memory was 325.3 MB in the beginning and 8.8 GB in the end (delta: -8.5 GB). Peak memory consumption was 8.4 GB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 53]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while ReachableStatesComputation was computing reachable states (487024 states constructedinput type DoubleDeckerAutomaton). - TimeoutResultAtElement [Line: 52]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while ReachableStatesComputation was computing reachable states (487024 states constructedinput type DoubleDeckerAutomaton). - TimeoutResultAtElement [Line: 52]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while ReachableStatesComputation was computing reachable states (487024 states constructedinput type DoubleDeckerAutomaton). - TimeoutResultAtElement [Line: 59]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while ReachableStatesComputation was computing reachable states (487024 states constructedinput type DoubleDeckerAutomaton). - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 39 locations, 4 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 613770.3ms, OverallIterations: 171, TraceHistogramMax: 3, EmptinessCheckTime: 18759.4ms, AutomataDifference: 193074.3ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 28.1ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 6583 SDtfs, 18213 SDslu, 31708 SDs, 0 SdLazy, 40648 SolverSat, 6068 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 20007.2ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 5989 GetRequests, 3080 SyntacticMatches, 311 SemanticMatches, 2598 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14374 ImplicationChecksByTransitivity, 31608.2ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=685088occurred in iteration=170, InterpolantAutomatonStates: 2543, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 334574.5ms AutomataMinimizationTime, 171 MinimizatonAttempts, 1187080 StatesRemovedByMinimization, 170 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 521.3ms SsaConstructionTime, 1749.8ms SatisfiabilityAnalysisTime, 26770.7ms InterpolantComputationTime, 7899 NumberOfCodeBlocks, 7892 NumberOfCodeBlocksAsserted, 560 NumberOfCheckSat, 7562 ConstructedInterpolants, 0 QuantifiedInterpolants, 55958 SizeOfPredicates, 266 NumberOfNonLiveVariables, 10162 ConjunctsInSsa, 2243 ConjunctsInUnsatCore, 337 InterpolantComputations, 7 PerfectInterpolantSequences, 305/2676 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