/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/bench/exp1x3.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-7cd14b8b9f04096d8ddfd3d9cd8a4ac590fe5404-7cd14b8 [2021-03-10 21:35:09,447 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-03-10 21:35:09,449 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-03-10 21:35:09,478 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-03-10 21:35:09,518 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 [2021-03-10 21:35:09,566 INFO L113 SettingsManager]: Loading preferences was successful [2021-03-10 21:35:09,566 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-03-10 21:35:09,566 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-03-10 21:35:09,566 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-03-10 21:35:09,567 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-03-10 21:35:09,567 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-03-10 21:35:09,567 INFO L138 SettingsManager]: * Use SBE=true [2021-03-10 21:35:09,567 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-03-10 21:35:09,568 INFO L138 SettingsManager]: * sizeof long=4 [2021-03-10 21:35:09,568 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-03-10 21:35:09,568 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-03-10 21:35:09,568 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-03-10 21:35:09,568 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-03-10 21:35:09,568 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-03-10 21:35:09,568 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-03-10 21:35:09,568 INFO L138 SettingsManager]: * sizeof long double=12 [2021-03-10 21:35:09,568 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-03-10 21:35:09,568 INFO L138 SettingsManager]: * Use constant arrays=true [2021-03-10 21:35:09,568 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-03-10 21:35:09,569 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-03-10 21:35:09,569 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-03-10 21:35:09,569 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-03-10 21:35:09,569 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-03-10 21:35:09,569 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-10 21:35:09,569 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-03-10 21:35:09,569 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-03-10 21:35:09,569 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-03-10 21:35:09,570 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-03-10 21:35:09,570 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-03-10 21:35:09,570 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-03-10 21:35:09,570 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-03-10 21:35:09,570 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-03-10 21:35:09,805 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-03-10 21:35:09,824 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-03-10 21:35:09,826 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-03-10 21:35:09,827 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-03-10 21:35:09,828 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-03-10 21:35:09,828 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/bench/exp1x3.wvr.bpl [2021-03-10 21:35:09,839 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/bench/exp1x3.wvr.bpl' [2021-03-10 21:35:09,861 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-03-10 21:35:09,865 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-03-10 21:35:09,866 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-03-10 21:35:09,866 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-03-10 21:35:09,866 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-03-10 21:35:09,874 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "exp1x3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 09:35:09" (1/1) ... [2021-03-10 21:35:09,878 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "exp1x3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 09:35:09" (1/1) ... [2021-03-10 21:35:09,890 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-03-10 21:35:09,890 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-03-10 21:35:09,891 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-03-10 21:35:09,891 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-03-10 21:35:09,896 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "exp1x3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 09:35:09" (1/1) ... [2021-03-10 21:35:09,896 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "exp1x3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 09:35:09" (1/1) ... [2021-03-10 21:35:09,897 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "exp1x3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 09:35:09" (1/1) ... [2021-03-10 21:35:09,897 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "exp1x3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 09:35:09" (1/1) ... [2021-03-10 21:35:09,898 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "exp1x3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 09:35:09" (1/1) ... [2021-03-10 21:35:09,899 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "exp1x3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 09:35:09" (1/1) ... [2021-03-10 21:35:09,900 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "exp1x3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 09:35:09" (1/1) ... [2021-03-10 21:35:09,900 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-03-10 21:35:09,901 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-03-10 21:35:09,901 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-03-10 21:35:09,902 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-03-10 21:35:09,903 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "exp1x3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 09:35:09" (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 [2021-03-10 21:35:09,963 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-03-10 21:35:09,963 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-03-10 21:35:09,963 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-03-10 21:35:09,963 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-03-10 21:35:09,963 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-03-10 21:35:09,963 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-03-10 21:35:09,964 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-03-10 21:35:09,964 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-03-10 21:35:09,964 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-03-10 21:35:09,964 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-03-10 21:35:10,087 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-03-10 21:35:10,087 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-03-10 21:35:10,089 INFO L202 PluginConnector]: Adding new model exp1x3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.03 09:35:10 BoogieIcfgContainer [2021-03-10 21:35:10,089 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-03-10 21:35:10,090 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-03-10 21:35:10,090 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-03-10 21:35:10,092 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-03-10 21:35:10,092 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "exp1x3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 09:35:09" (1/2) ... [2021-03-10 21:35:10,093 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b91561d and model type exp1x3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.03 09:35:10, skipping insertion in model container [2021-03-10 21:35:10,093 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "exp1x3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.03 09:35:10" (2/2) ... [2021-03-10 21:35:10,094 INFO L111 eAbstractionObserver]: Analyzing ICFG exp1x3.wvr.bpl [2021-03-10 21:35:10,101 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-03-10 21:35:10,101 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-03-10 21:35:10,109 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-03-10 21:35:10,110 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-03-10 21:35:10,155 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-03-10 21:35:10,167 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-03-10 21:35:10,179 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-10 21:35:10,179 INFO L377 AbstractCegarLoop]: Hoare is true [2021-03-10 21:35:10,179 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-10 21:35:10,179 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-10 21:35:10,179 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-10 21:35:10,179 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-10 21:35:10,179 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-10 21:35:10,179 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-10 21:35:10,185 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 24 places, 19 transitions, 54 flow [2021-03-10 21:35:10,193 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 31 states, 29 states have (on average 1.896551724137931) internal successors, (55), 30 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:10,194 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 29 states have (on average 1.896551724137931) internal successors, (55), 30 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:10,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-03-10 21:35:10,198 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:35:10,198 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:35:10,199 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:35:10,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:35:10,203 INFO L82 PathProgramCache]: Analyzing trace with hash -64585232, now seen corresponding path program 1 times [2021-03-10 21:35:10,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:35:10,209 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673371306] [2021-03-10 21:35:10,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:35:10,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:35:10,316 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:10,316 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673371306] [2021-03-10 21:35:10,317 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:35:10,317 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-03-10 21:35:10,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27764539] [2021-03-10 21:35:10,320 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-10 21:35:10,320 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:35:10,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-10 21:35:10,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-10 21:35:10,333 INFO L87 Difference]: Start difference. First operand has 31 states, 29 states have (on average 1.896551724137931) internal successors, (55), 30 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:10,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:35:10,391 INFO L93 Difference]: Finished difference Result 54 states and 102 transitions. [2021-03-10 21:35:10,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-10 21:35:10,392 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-03-10 21:35:10,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:35:10,398 INFO L225 Difference]: With dead ends: 54 [2021-03-10 21:35:10,398 INFO L226 Difference]: Without dead ends: 47 [2021-03-10 21:35:10,399 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-10 21:35:10,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-03-10 21:35:10,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 38. [2021-03-10 21:35:10,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.9189189189189189) internal successors, (71), 37 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:10,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 71 transitions. [2021-03-10 21:35:10,419 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 71 transitions. Word has length 11 [2021-03-10 21:35:10,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:35:10,419 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 71 transitions. [2021-03-10 21:35:10,419 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:10,419 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 71 transitions. [2021-03-10 21:35:10,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-03-10 21:35:10,420 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:35:10,420 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:35:10,420 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-03-10 21:35:10,420 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:35:10,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:35:10,421 INFO L82 PathProgramCache]: Analyzing trace with hash 732040690, now seen corresponding path program 1 times [2021-03-10 21:35:10,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:35:10,421 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274359075] [2021-03-10 21:35:10,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:35:10,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:35:10,459 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:10,460 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274359075] [2021-03-10 21:35:10,460 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1823389021] [2021-03-10 21:35:10,460 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 [2021-03-10 21:35:10,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:35:10,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 3 conjunts are in the unsatisfiable core [2021-03-10 21:35:10,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:35:10,553 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:10,554 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:35:10,554 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 5 [2021-03-10 21:35:10,554 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566788569] [2021-03-10 21:35:10,555 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-10 21:35:10,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:35:10,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-10 21:35:10,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-03-10 21:35:10,556 INFO L87 Difference]: Start difference. First operand 38 states and 71 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:10,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:35:10,596 INFO L93 Difference]: Finished difference Result 68 states and 120 transitions. [2021-03-10 21:35:10,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-03-10 21:35:10,596 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-03-10 21:35:10,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:35:10,597 INFO L225 Difference]: With dead ends: 68 [2021-03-10 21:35:10,597 INFO L226 Difference]: Without dead ends: 68 [2021-03-10 21:35:10,598 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 28.2ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:35:10,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-03-10 21:35:10,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 39. [2021-03-10 21:35:10,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.9736842105263157) internal successors, (75), 38 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:10,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 75 transitions. [2021-03-10 21:35:10,603 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 75 transitions. Word has length 13 [2021-03-10 21:35:10,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:35:10,603 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 75 transitions. [2021-03-10 21:35:10,603 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:10,603 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 75 transitions. [2021-03-10 21:35:10,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-03-10 21:35:10,604 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:35:10,604 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:35:10,819 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-03-10 21:35:10,819 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:35:10,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:35:10,820 INFO L82 PathProgramCache]: Analyzing trace with hash 1434845998, now seen corresponding path program 1 times [2021-03-10 21:35:10,820 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:35:10,820 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154416448] [2021-03-10 21:35:10,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:35:10,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:35:10,848 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:10,849 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154416448] [2021-03-10 21:35:10,849 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:35:10,849 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-03-10 21:35:10,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108094268] [2021-03-10 21:35:10,849 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-10 21:35:10,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:35:10,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-10 21:35:10,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-03-10 21:35:10,850 INFO L87 Difference]: Start difference. First operand 39 states and 75 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:10,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:35:10,868 INFO L93 Difference]: Finished difference Result 47 states and 84 transitions. [2021-03-10 21:35:10,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-03-10 21:35:10,868 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-03-10 21:35:10,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:35:10,869 INFO L225 Difference]: With dead ends: 47 [2021-03-10 21:35:10,869 INFO L226 Difference]: Without dead ends: 40 [2021-03-10 21:35:10,869 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.7ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-03-10 21:35:10,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-03-10 21:35:10,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 37. [2021-03-10 21:35:10,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.9166666666666667) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:10,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 69 transitions. [2021-03-10 21:35:10,872 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 69 transitions. Word has length 13 [2021-03-10 21:35:10,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:35:10,873 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 69 transitions. [2021-03-10 21:35:10,873 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:10,873 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 69 transitions. [2021-03-10 21:35:10,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-03-10 21:35:10,873 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:35:10,873 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:35:10,873 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-03-10 21:35:10,874 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:35:10,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:35:10,874 INFO L82 PathProgramCache]: Analyzing trace with hash 1306103410, now seen corresponding path program 2 times [2021-03-10 21:35:10,874 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:35:10,874 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472139868] [2021-03-10 21:35:10,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:35:10,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:35:10,900 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:10,900 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472139868] [2021-03-10 21:35:10,900 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:35:10,900 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-03-10 21:35:10,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680718122] [2021-03-10 21:35:10,900 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-10 21:35:10,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:35:10,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-10 21:35:10,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-03-10 21:35:10,901 INFO L87 Difference]: Start difference. First operand 37 states and 69 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:10,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:35:10,921 INFO L93 Difference]: Finished difference Result 44 states and 83 transitions. [2021-03-10 21:35:10,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-10 21:35:10,922 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-03-10 21:35:10,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:35:10,922 INFO L225 Difference]: With dead ends: 44 [2021-03-10 21:35:10,922 INFO L226 Difference]: Without dead ends: 44 [2021-03-10 21:35:10,923 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 10.6ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-03-10 21:35:10,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-03-10 21:35:10,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 40. [2021-03-10 21:35:10,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.9230769230769231) internal successors, (75), 39 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:10,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 75 transitions. [2021-03-10 21:35:10,926 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 75 transitions. Word has length 13 [2021-03-10 21:35:10,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:35:10,926 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 75 transitions. [2021-03-10 21:35:10,927 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:10,927 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 75 transitions. [2021-03-10 21:35:10,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:35:10,927 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:35:10,927 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:35:10,927 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-03-10 21:35:10,927 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:35:10,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:35:10,928 INFO L82 PathProgramCache]: Analyzing trace with hash -1806788944, now seen corresponding path program 1 times [2021-03-10 21:35:10,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:35:10,928 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768724969] [2021-03-10 21:35:10,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:35:10,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:35:10,964 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:10,965 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768724969] [2021-03-10 21:35:10,965 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1030617024] [2021-03-10 21:35:10,965 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 [2021-03-10 21:35:10,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:35:10,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:35:10,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:35:11,100 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:11,101 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:35:11,101 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4] total 4 [2021-03-10 21:35:11,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3082731] [2021-03-10 21:35:11,101 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-10 21:35:11,101 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:35:11,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-10 21:35:11,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-03-10 21:35:11,102 INFO L87 Difference]: Start difference. First operand 40 states and 75 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:11,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:35:11,133 INFO L93 Difference]: Finished difference Result 97 states and 185 transitions. [2021-03-10 21:35:11,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-10 21:35:11,133 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have 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 [2021-03-10 21:35:11,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:35:11,134 INFO L225 Difference]: With dead ends: 97 [2021-03-10 21:35:11,134 INFO L226 Difference]: Without dead ends: 90 [2021-03-10 21:35:11,134 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.1ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-03-10 21:35:11,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-03-10 21:35:11,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 66. [2021-03-10 21:35:11,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 2.0923076923076924) internal successors, (136), 65 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:11,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 136 transitions. [2021-03-10 21:35:11,140 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 136 transitions. Word has length 15 [2021-03-10 21:35:11,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:35:11,140 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 136 transitions. [2021-03-10 21:35:11,140 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:11,140 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 136 transitions. [2021-03-10 21:35:11,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:35:11,141 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:35:11,141 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:35:11,358 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:35:11,358 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:35:11,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:35:11,359 INFO L82 PathProgramCache]: Analyzing trace with hash 1307356592, now seen corresponding path program 2 times [2021-03-10 21:35:11,359 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:35:11,359 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027221876] [2021-03-10 21:35:11,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:35:11,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:35:11,402 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:35:11,402 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027221876] [2021-03-10 21:35:11,403 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:35:11,403 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-03-10 21:35:11,403 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322248378] [2021-03-10 21:35:11,403 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-10 21:35:11,403 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:35:11,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-10 21:35:11,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-03-10 21:35:11,404 INFO L87 Difference]: Start difference. First operand 66 states and 136 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 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) [2021-03-10 21:35:11,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:35:11,436 INFO L93 Difference]: Finished difference Result 115 states and 230 transitions. [2021-03-10 21:35:11,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-03-10 21:35:11,436 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 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 [2021-03-10 21:35:11,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:35:11,437 INFO L225 Difference]: With dead ends: 115 [2021-03-10 21:35:11,437 INFO L226 Difference]: Without dead ends: 108 [2021-03-10 21:35:11,438 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.3ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-03-10 21:35:11,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-03-10 21:35:11,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 83. [2021-03-10 21:35:11,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 2.1707317073170733) internal successors, (178), 82 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:11,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 178 transitions. [2021-03-10 21:35:11,444 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 178 transitions. Word has length 15 [2021-03-10 21:35:11,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:35:11,445 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 178 transitions. [2021-03-10 21:35:11,445 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 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) [2021-03-10 21:35:11,445 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 178 transitions. [2021-03-10 21:35:11,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:35:11,445 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:35:11,445 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:35:11,446 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-03-10 21:35:11,446 INFO L428 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:35:11,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:35:11,446 INFO L82 PathProgramCache]: Analyzing trace with hash 1128288690, now seen corresponding path program 3 times [2021-03-10 21:35:11,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:35:11,446 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197279065] [2021-03-10 21:35:11,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:35:11,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:35:11,506 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:11,506 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197279065] [2021-03-10 21:35:11,506 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141109455] [2021-03-10 21:35:11,506 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:35:11,529 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 21:35:11,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:35:11,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 5 conjunts are in the unsatisfiable core [2021-03-10 21:35:11,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:35:11,640 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:11,640 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:35:11,640 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-03-10 21:35:11,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497562058] [2021-03-10 21:35:11,641 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 21:35:11,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:35:11,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 21:35:11,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:35:11,641 INFO L87 Difference]: Start difference. First operand 83 states and 178 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 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) [2021-03-10 21:35:11,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:35:11,844 INFO L93 Difference]: Finished difference Result 164 states and 313 transitions. [2021-03-10 21:35:11,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 21:35:11,844 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 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 17 [2021-03-10 21:35:11,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:35:11,847 INFO L225 Difference]: With dead ends: 164 [2021-03-10 21:35:11,847 INFO L226 Difference]: Without dead ends: 164 [2021-03-10 21:35:11,847 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 132.0ms TimeCoverageRelationStatistics Valid=116, Invalid=304, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:35:11,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-03-10 21:35:11,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 80. [2021-03-10 21:35:11,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 2.1392405063291138) internal successors, (169), 79 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:11,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 169 transitions. [2021-03-10 21:35:11,864 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 169 transitions. Word has length 17 [2021-03-10 21:35:11,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:35:11,865 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 169 transitions. [2021-03-10 21:35:11,865 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 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) [2021-03-10 21:35:11,865 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 169 transitions. [2021-03-10 21:35:11,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:35:11,865 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:35:11,865 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:35:12,071 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:35:12,071 INFO L428 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:35:12,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:35:12,072 INFO L82 PathProgramCache]: Analyzing trace with hash -2080643090, now seen corresponding path program 4 times [2021-03-10 21:35:12,072 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:35:12,072 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329508586] [2021-03-10 21:35:12,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:35:12,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:35:12,111 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:12,111 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329508586] [2021-03-10 21:35:12,111 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035024363] [2021-03-10 21:35:12,111 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:35:12,137 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:35:12,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:35:12,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 5 conjunts are in the unsatisfiable core [2021-03-10 21:35:12,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:35:12,200 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:12,200 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:35:12,200 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-03-10 21:35:12,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652515938] [2021-03-10 21:35:12,200 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 21:35:12,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:35:12,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 21:35:12,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:35:12,201 INFO L87 Difference]: Start difference. First operand 80 states and 169 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 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) [2021-03-10 21:35:12,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:35:12,315 INFO L93 Difference]: Finished difference Result 167 states and 311 transitions. [2021-03-10 21:35:12,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:35:12,315 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 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 17 [2021-03-10 21:35:12,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:35:12,316 INFO L225 Difference]: With dead ends: 167 [2021-03-10 21:35:12,316 INFO L226 Difference]: Without dead ends: 153 [2021-03-10 21:35:12,316 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 75.7ms TimeCoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:35:12,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-03-10 21:35:12,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 104. [2021-03-10 21:35:12,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 2.1553398058252426) internal successors, (222), 103 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:12,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 222 transitions. [2021-03-10 21:35:12,321 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 222 transitions. Word has length 17 [2021-03-10 21:35:12,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:35:12,321 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 222 transitions. [2021-03-10 21:35:12,321 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 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) [2021-03-10 21:35:12,321 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 222 transitions. [2021-03-10 21:35:12,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:35:12,322 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:35:12,322 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:35:12,533 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:35:12,534 INFO L428 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:35:12,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:35:12,534 INFO L82 PathProgramCache]: Analyzing trace with hash 1781820862, now seen corresponding path program 5 times [2021-03-10 21:35:12,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:35:12,534 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491918801] [2021-03-10 21:35:12,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:35:12,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:35:12,576 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:12,576 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491918801] [2021-03-10 21:35:12,576 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1037669152] [2021-03-10 21:35:12,576 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:35:12,598 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 21:35:12,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:35:12,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 5 conjunts are in the unsatisfiable core [2021-03-10 21:35:12,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:35:12,685 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:12,685 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:35:12,685 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-03-10 21:35:12,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578837208] [2021-03-10 21:35:12,686 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 21:35:12,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:35:12,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 21:35:12,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:35:12,686 INFO L87 Difference]: Start difference. First operand 104 states and 222 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) [2021-03-10 21:35:12,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:35:12,807 INFO L93 Difference]: Finished difference Result 147 states and 286 transitions. [2021-03-10 21:35:12,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:35:12,808 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 17 [2021-03-10 21:35:12,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:35:12,808 INFO L225 Difference]: With dead ends: 147 [2021-03-10 21:35:12,808 INFO L226 Difference]: Without dead ends: 147 [2021-03-10 21:35:12,809 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 78.0ms TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:35:12,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-03-10 21:35:12,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 103. [2021-03-10 21:35:12,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 2.127450980392157) internal successors, (217), 102 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:12,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 217 transitions. [2021-03-10 21:35:12,816 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 217 transitions. Word has length 17 [2021-03-10 21:35:12,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:35:12,816 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 217 transitions. [2021-03-10 21:35:12,816 INFO L481 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) [2021-03-10 21:35:12,816 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 217 transitions. [2021-03-10 21:35:12,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:35:12,817 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:35:12,817 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:35:13,029 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:35:13,029 INFO L428 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:35:13,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:35:13,029 INFO L82 PathProgramCache]: Analyzing trace with hash 397922780, now seen corresponding path program 6 times [2021-03-10 21:35:13,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:35:13,029 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350668523] [2021-03-10 21:35:13,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:35:13,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:35:13,052 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:13,052 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350668523] [2021-03-10 21:35:13,052 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1488302514] [2021-03-10 21:35:13,052 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:35:13,078 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 21:35:13,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:35:13,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 5 conjunts are in the unsatisfiable core Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:35:13,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:35:13,149 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:13,149 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:35:13,149 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-03-10 21:35:13,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373435140] [2021-03-10 21:35:13,151 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 21:35:13,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:35:13,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 21:35:13,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:35:13,152 INFO L87 Difference]: Start difference. First operand 103 states and 217 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) [2021-03-10 21:35:13,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:35:13,224 INFO L93 Difference]: Finished difference Result 114 states and 233 transitions. [2021-03-10 21:35:13,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-10 21:35:13,225 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 17 [2021-03-10 21:35:13,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:35:13,226 INFO L225 Difference]: With dead ends: 114 [2021-03-10 21:35:13,226 INFO L226 Difference]: Without dead ends: 112 [2021-03-10 21:35:13,226 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 39.4ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:35:13,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-03-10 21:35:13,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 103. [2021-03-10 21:35:13,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 2.1176470588235294) internal successors, (216), 102 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:13,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 216 transitions. [2021-03-10 21:35:13,229 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 216 transitions. Word has length 17 [2021-03-10 21:35:13,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:35:13,229 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 216 transitions. [2021-03-10 21:35:13,230 INFO L481 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) [2021-03-10 21:35:13,230 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 216 transitions. [2021-03-10 21:35:13,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:35:13,230 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:35:13,230 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:35:13,443 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:35:13,443 INFO L428 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:35:13,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:35:13,444 INFO L82 PathProgramCache]: Analyzing trace with hash 613173682, now seen corresponding path program 7 times [2021-03-10 21:35:13,444 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:35:13,444 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754674841] [2021-03-10 21:35:13,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:35:13,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:35:13,479 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:13,479 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754674841] [2021-03-10 21:35:13,479 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [72431506] [2021-03-10 21:35:13,479 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 21:35:13,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:35:13,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 5 conjunts are in the unsatisfiable core [2021-03-10 21:35:13,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:35:13,569 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:13,569 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:35:13,569 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-03-10 21:35:13,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415719477] [2021-03-10 21:35:13,571 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 21:35:13,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:35:13,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 21:35:13,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:35:13,571 INFO L87 Difference]: Start difference. First operand 103 states and 216 transitions. Second operand has 8 states, 8 states have (on average 3.75) internal successors, (30), 7 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) [2021-03-10 21:35:13,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:35:13,672 INFO L93 Difference]: Finished difference Result 208 states and 409 transitions. [2021-03-10 21:35:13,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:35:13,673 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 7 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 17 [2021-03-10 21:35:13,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:35:13,674 INFO L225 Difference]: With dead ends: 208 [2021-03-10 21:35:13,674 INFO L226 Difference]: Without dead ends: 208 [2021-03-10 21:35:13,674 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 73.0ms TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:35:13,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-03-10 21:35:13,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 124. [2021-03-10 21:35:13,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 2.186991869918699) internal successors, (269), 123 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:13,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 269 transitions. [2021-03-10 21:35:13,678 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 269 transitions. Word has length 17 [2021-03-10 21:35:13,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:35:13,678 INFO L480 AbstractCegarLoop]: Abstraction has 124 states and 269 transitions. [2021-03-10 21:35:13,678 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 7 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) [2021-03-10 21:35:13,678 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 269 transitions. [2021-03-10 21:35:13,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:35:13,680 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:35:13,681 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:35:13,895 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:35:13,896 INFO L428 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:35:13,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:35:13,896 INFO L82 PathProgramCache]: Analyzing trace with hash 1315978990, now seen corresponding path program 8 times [2021-03-10 21:35:13,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:35:13,896 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656940868] [2021-03-10 21:35:13,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:35:13,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:35:13,920 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:13,920 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656940868] [2021-03-10 21:35:13,920 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1205173679] [2021-03-10 21:35:13,920 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:35:13,935 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:35:13,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:35:13,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 5 conjunts are in the unsatisfiable core [2021-03-10 21:35:13,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:35:13,984 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:13,985 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:35:13,985 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-03-10 21:35:13,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329015651] [2021-03-10 21:35:13,985 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 21:35:13,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:35:13,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 21:35:13,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:35:13,986 INFO L87 Difference]: Start difference. First operand 124 states and 269 transitions. Second operand has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:14,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:35:14,073 INFO L93 Difference]: Finished difference Result 145 states and 295 transitions. [2021-03-10 21:35:14,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:35:14,073 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:35:14,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:35:14,074 INFO L225 Difference]: With dead ends: 145 [2021-03-10 21:35:14,075 INFO L226 Difference]: Without dead ends: 142 [2021-03-10 21:35:14,075 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 44.5ms TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:35:14,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-03-10 21:35:14,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 121. [2021-03-10 21:35:14,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 2.191666666666667) internal successors, (263), 120 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:14,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 263 transitions. [2021-03-10 21:35:14,084 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 263 transitions. Word has length 17 [2021-03-10 21:35:14,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:35:14,084 INFO L480 AbstractCegarLoop]: Abstraction has 121 states and 263 transitions. [2021-03-10 21:35:14,084 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:14,084 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 263 transitions. [2021-03-10 21:35:14,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:35:14,084 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:35:14,084 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:35:14,287 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-03-10 21:35:14,287 INFO L428 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:35:14,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:35:14,288 INFO L82 PathProgramCache]: Analyzing trace with hash 51051130, now seen corresponding path program 9 times [2021-03-10 21:35:14,288 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:35:14,288 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769862426] [2021-03-10 21:35:14,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:35:14,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:35:14,317 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:14,317 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769862426] [2021-03-10 21:35:14,317 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1862296536] [2021-03-10 21:35:14,317 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:35:14,340 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 21:35:14,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:35:14,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 5 conjunts are in the unsatisfiable core [2021-03-10 21:35:14,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:35:14,390 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:14,390 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:35:14,390 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-03-10 21:35:14,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795353011] [2021-03-10 21:35:14,391 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 21:35:14,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:35:14,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 21:35:14,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:35:14,392 INFO L87 Difference]: Start difference. First operand 121 states and 263 transitions. Second operand has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:14,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:35:14,537 INFO L93 Difference]: Finished difference Result 165 states and 338 transitions. [2021-03-10 21:35:14,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:35:14,538 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:35:14,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:35:14,538 INFO L225 Difference]: With dead ends: 165 [2021-03-10 21:35:14,539 INFO L226 Difference]: Without dead ends: 165 [2021-03-10 21:35:14,539 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 72.6ms TimeCoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:35:14,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-03-10 21:35:14,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 123. [2021-03-10 21:35:14,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 122 states have (on average 2.19672131147541) internal successors, (268), 122 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:14,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 268 transitions. [2021-03-10 21:35:14,542 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 268 transitions. Word has length 17 [2021-03-10 21:35:14,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:35:14,542 INFO L480 AbstractCegarLoop]: Abstraction has 123 states and 268 transitions. [2021-03-10 21:35:14,542 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:14,542 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 268 transitions. [2021-03-10 21:35:14,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:35:14,542 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:35:14,542 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:35:14,757 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:35:14,757 INFO L428 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:35:14,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:35:14,757 INFO L82 PathProgramCache]: Analyzing trace with hash -1332846952, now seen corresponding path program 10 times [2021-03-10 21:35:14,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:35:14,758 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451987096] [2021-03-10 21:35:14,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:35:14,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:35:14,789 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:14,789 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451987096] [2021-03-10 21:35:14,789 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [168380887] [2021-03-10 21:35:14,789 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:35:14,802 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:35:14,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:35:14,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 5 conjunts are in the unsatisfiable core [2021-03-10 21:35:14,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:35:14,853 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:14,854 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:35:14,854 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-03-10 21:35:14,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276489413] [2021-03-10 21:35:14,854 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 21:35:14,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:35:14,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 21:35:14,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:35:14,855 INFO L87 Difference]: Start difference. First operand 123 states and 268 transitions. Second operand has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:14,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:35:14,943 INFO L93 Difference]: Finished difference Result 199 states and 385 transitions. [2021-03-10 21:35:14,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:35:14,944 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:35:14,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:35:14,945 INFO L225 Difference]: With dead ends: 199 [2021-03-10 21:35:14,945 INFO L226 Difference]: Without dead ends: 197 [2021-03-10 21:35:14,945 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 62.3ms TimeCoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:35:14,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-03-10 21:35:14,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 125. [2021-03-10 21:35:14,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 2.1774193548387095) internal successors, (270), 124 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:14,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 270 transitions. [2021-03-10 21:35:14,948 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 270 transitions. Word has length 17 [2021-03-10 21:35:14,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:35:14,948 INFO L480 AbstractCegarLoop]: Abstraction has 125 states and 270 transitions. [2021-03-10 21:35:14,948 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:14,948 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 270 transitions. [2021-03-10 21:35:14,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:35:14,949 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:35:14,949 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:35:15,163 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:35:15,163 INFO L428 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:35:15,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:35:15,164 INFO L82 PathProgramCache]: Analyzing trace with hash 1145142718, now seen corresponding path program 11 times [2021-03-10 21:35:15,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:35:15,164 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705783174] [2021-03-10 21:35:15,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:35:15,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:35:15,194 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:15,194 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705783174] [2021-03-10 21:35:15,194 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1605067795] [2021-03-10 21:35:15,195 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:35:15,217 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 21:35:15,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:35:15,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 5 conjunts are in the unsatisfiable core [2021-03-10 21:35:15,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:35:15,271 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:15,271 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:35:15,271 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-03-10 21:35:15,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705018003] [2021-03-10 21:35:15,271 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 21:35:15,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:35:15,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 21:35:15,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:35:15,272 INFO L87 Difference]: Start difference. First operand 125 states and 270 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) [2021-03-10 21:35:15,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:35:15,461 INFO L93 Difference]: Finished difference Result 174 states and 367 transitions. [2021-03-10 21:35:15,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 21:35:15,462 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 17 [2021-03-10 21:35:15,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:35:15,462 INFO L225 Difference]: With dead ends: 174 [2021-03-10 21:35:15,462 INFO L226 Difference]: Without dead ends: 174 [2021-03-10 21:35:15,464 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 129.1ms TimeCoverageRelationStatistics Valid=116, Invalid=304, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:35:15,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-03-10 21:35:15,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 131. [2021-03-10 21:35:15,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 130 states have (on average 2.1769230769230767) internal successors, (283), 130 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:15,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 283 transitions. [2021-03-10 21:35:15,467 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 283 transitions. Word has length 17 [2021-03-10 21:35:15,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:35:15,467 INFO L480 AbstractCegarLoop]: Abstraction has 131 states and 283 transitions. [2021-03-10 21:35:15,467 INFO L481 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) [2021-03-10 21:35:15,467 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 283 transitions. [2021-03-10 21:35:15,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:35:15,468 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:35:15,468 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:35:15,682 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-03-10 21:35:15,683 INFO L428 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:35:15,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:35:15,683 INFO L82 PathProgramCache]: Analyzing trace with hash -1839193218, now seen corresponding path program 12 times [2021-03-10 21:35:15,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:35:15,683 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835947848] [2021-03-10 21:35:15,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:35:15,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:35:15,706 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:15,706 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835947848] [2021-03-10 21:35:15,706 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950251489] [2021-03-10 21:35:15,706 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:35:15,721 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 21:35:15,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:35:15,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 5 conjunts are in the unsatisfiable core [2021-03-10 21:35:15,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:35:15,776 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:15,776 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:35:15,776 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-03-10 21:35:15,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145316192] [2021-03-10 21:35:15,776 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 21:35:15,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:35:15,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 21:35:15,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:35:15,777 INFO L87 Difference]: Start difference. First operand 131 states and 283 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) [2021-03-10 21:35:15,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:35:15,891 INFO L93 Difference]: Finished difference Result 205 states and 395 transitions. [2021-03-10 21:35:15,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:35:15,891 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 17 [2021-03-10 21:35:15,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:35:15,892 INFO L225 Difference]: With dead ends: 205 [2021-03-10 21:35:15,892 INFO L226 Difference]: Without dead ends: 199 [2021-03-10 21:35:15,892 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 79.9ms TimeCoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:35:15,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-03-10 21:35:15,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 135. [2021-03-10 21:35:15,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 2.1417910447761193) internal successors, (287), 134 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:15,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 287 transitions. [2021-03-10 21:35:15,895 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 287 transitions. Word has length 17 [2021-03-10 21:35:15,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:35:15,895 INFO L480 AbstractCegarLoop]: Abstraction has 135 states and 287 transitions. [2021-03-10 21:35:15,895 INFO L481 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) [2021-03-10 21:35:15,895 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 287 transitions. [2021-03-10 21:35:15,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:35:15,896 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:35:15,896 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:35:16,096 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-03-10 21:35:16,096 INFO L428 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:35:16,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:35:16,097 INFO L82 PathProgramCache]: Analyzing trace with hash 1030417008, now seen corresponding path program 13 times [2021-03-10 21:35:16,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:35:16,097 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602601801] [2021-03-10 21:35:16,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:35:16,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:35:16,130 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:16,130 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602601801] [2021-03-10 21:35:16,130 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481248003] [2021-03-10 21:35:16,130 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:35:16,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:35:16,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:35:16,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:35:16,259 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:16,259 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:35:16,259 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6] total 6 [2021-03-10 21:35:16,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55809033] [2021-03-10 21:35:16,260 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:35:16,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:35:16,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:35:16,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:35:16,260 INFO L87 Difference]: Start difference. First operand 135 states and 287 transitions. Second operand has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:16,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:35:16,322 INFO L93 Difference]: Finished difference Result 224 states and 457 transitions. [2021-03-10 21:35:16,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:35:16,322 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:35:16,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:35:16,323 INFO L225 Difference]: With dead ends: 224 [2021-03-10 21:35:16,323 INFO L226 Difference]: Without dead ends: 217 [2021-03-10 21:35:16,323 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 15 SyntacticMatches, 4 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 36.7ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:35:16,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2021-03-10 21:35:16,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 175. [2021-03-10 21:35:16,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 2.1954022988505746) internal successors, (382), 174 states have internal predecessors, (382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:16,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 382 transitions. [2021-03-10 21:35:16,326 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 382 transitions. Word has length 19 [2021-03-10 21:35:16,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:35:16,326 INFO L480 AbstractCegarLoop]: Abstraction has 175 states and 382 transitions. [2021-03-10 21:35:16,326 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:16,326 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 382 transitions. [2021-03-10 21:35:16,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:35:16,327 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:35:16,327 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:35:16,527 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-03-10 21:35:16,527 INFO L428 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:35:16,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:35:16,528 INFO L82 PathProgramCache]: Analyzing trace with hash -1048749968, now seen corresponding path program 14 times [2021-03-10 21:35:16,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:35:16,528 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569751949] [2021-03-10 21:35:16,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:35:16,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:35:16,573 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:35:16,573 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569751949] [2021-03-10 21:35:16,573 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978150504] [2021-03-10 21:35:16,574 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 21:35:16,586 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:35:16,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:35:16,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:35:16,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:35:16,700 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:16,700 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:35:16,700 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6] total 7 [2021-03-10 21:35:16,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587073502] [2021-03-10 21:35:16,700 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 21:35:16,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:35:16,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 21:35:16,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:35:16,703 INFO L87 Difference]: Start difference. First operand 175 states and 382 transitions. Second operand has 8 states, 8 states have (on average 3.75) internal successors, (30), 7 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) [2021-03-10 21:35:16,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:35:16,768 INFO L93 Difference]: Finished difference Result 276 states and 576 transitions. [2021-03-10 21:35:16,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-10 21:35:16,769 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 7 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:35:16,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:35:16,770 INFO L225 Difference]: With dead ends: 276 [2021-03-10 21:35:16,770 INFO L226 Difference]: Without dead ends: 262 [2021-03-10 21:35:16,770 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 4 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 63.8ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:35:16,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2021-03-10 21:35:16,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 193. [2021-03-10 21:35:16,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 192 states have (on average 2.2552083333333335) internal successors, (433), 192 states have internal predecessors, (433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:16,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 433 transitions. [2021-03-10 21:35:16,774 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 433 transitions. Word has length 19 [2021-03-10 21:35:16,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:35:16,774 INFO L480 AbstractCegarLoop]: Abstraction has 193 states and 433 transitions. [2021-03-10 21:35:16,774 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 7 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) [2021-03-10 21:35:16,774 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 433 transitions. [2021-03-10 21:35:16,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:35:16,774 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:35:16,774 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:35:16,987 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:35:16,987 INFO L428 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:35:16,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:35:16,987 INFO L82 PathProgramCache]: Analyzing trace with hash -588981648, now seen corresponding path program 15 times [2021-03-10 21:35:16,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:35:16,988 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92167495] [2021-03-10 21:35:16,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:35:16,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:35:17,036 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:35:17,036 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92167495] [2021-03-10 21:35:17,036 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [280133232] [2021-03-10 21:35:17,036 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:35:17,064 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 21:35:17,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:35:17,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:35:17,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:35:17,150 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:17,150 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:35:17,150 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6] total 6 [2021-03-10 21:35:17,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457842753] [2021-03-10 21:35:17,151 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:35:17,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:35:17,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:35:17,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:35:17,152 INFO L87 Difference]: Start difference. First operand 193 states and 433 transitions. Second operand has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 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) [2021-03-10 21:35:17,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:35:17,220 INFO L93 Difference]: Finished difference Result 276 states and 592 transitions. [2021-03-10 21:35:17,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:35:17,220 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 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 19 [2021-03-10 21:35:17,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:35:17,221 INFO L225 Difference]: With dead ends: 276 [2021-03-10 21:35:17,221 INFO L226 Difference]: Without dead ends: 269 [2021-03-10 21:35:17,221 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 15 SyntacticMatches, 4 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 53.1ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:35:17,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2021-03-10 21:35:17,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 223. [2021-03-10 21:35:17,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 222 states have (on average 2.279279279279279) internal successors, (506), 222 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:17,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 506 transitions. [2021-03-10 21:35:17,226 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 506 transitions. Word has length 19 [2021-03-10 21:35:17,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:35:17,227 INFO L480 AbstractCegarLoop]: Abstraction has 223 states and 506 transitions. [2021-03-10 21:35:17,227 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 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) [2021-03-10 21:35:17,227 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 506 transitions. [2021-03-10 21:35:17,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:35:17,227 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:35:17,227 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:35:17,443 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:35:17,444 INFO L428 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:35:17,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:35:17,444 INFO L82 PathProgramCache]: Analyzing trace with hash 1461933170, now seen corresponding path program 16 times [2021-03-10 21:35:17,444 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:35:17,444 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221324388] [2021-03-10 21:35:17,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:35:17,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:35:17,474 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:17,474 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221324388] [2021-03-10 21:35:17,474 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1399263303] [2021-03-10 21:35:17,475 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:35:17,498 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:35:17,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:35:17,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:35:17,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:35:17,583 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:17,583 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:35:17,583 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-03-10 21:35:17,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131776104] [2021-03-10 21:35:17,584 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:35:17,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:35:17,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:35:17,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:35:17,585 INFO L87 Difference]: Start difference. First operand 223 states and 506 transitions. Second operand has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 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) [2021-03-10 21:35:18,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:35:18,291 INFO L93 Difference]: Finished difference Result 437 states and 898 transitions. [2021-03-10 21:35:18,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-03-10 21:35:18,292 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 21:35:18,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:35:18,293 INFO L225 Difference]: With dead ends: 437 [2021-03-10 21:35:18,293 INFO L226 Difference]: Without dead ends: 437 [2021-03-10 21:35:18,294 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 381 ImplicationChecksByTransitivity, 445.0ms TimeCoverageRelationStatistics Valid=406, Invalid=1400, Unknown=0, NotChecked=0, Total=1806 [2021-03-10 21:35:18,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 437 states. [2021-03-10 21:35:18,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 437 to 183. [2021-03-10 21:35:18,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 2.2527472527472527) internal successors, (410), 182 states have internal predecessors, (410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:18,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 410 transitions. [2021-03-10 21:35:18,299 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 410 transitions. Word has length 21 [2021-03-10 21:35:18,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:35:18,299 INFO L480 AbstractCegarLoop]: Abstraction has 183 states and 410 transitions. [2021-03-10 21:35:18,299 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 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) [2021-03-10 21:35:18,299 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 410 transitions. [2021-03-10 21:35:18,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:35:18,299 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:35:18,299 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:35:18,514 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:35:18,514 INFO L428 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:35:18,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:35:18,514 INFO L82 PathProgramCache]: Analyzing trace with hash 1465011118, now seen corresponding path program 17 times [2021-03-10 21:35:18,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:35:18,515 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749213179] [2021-03-10 21:35:18,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:35:18,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:35:18,553 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:18,553 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749213179] [2021-03-10 21:35:18,553 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [82119097] [2021-03-10 21:35:18,553 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 21:35:18,567 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 21:35:18,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:35:18,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:35:18,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:35:18,639 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:18,639 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:35:18,639 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-03-10 21:35:18,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423727207] [2021-03-10 21:35:18,639 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:35:18,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:35:18,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:35:18,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:35:18,640 INFO L87 Difference]: Start difference. First operand 183 states and 410 transitions. Second operand has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 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) [2021-03-10 21:35:18,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:35:18,996 INFO L93 Difference]: Finished difference Result 414 states and 782 transitions. [2021-03-10 21:35:18,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-03-10 21:35:18,996 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 21:35:18,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:35:18,998 INFO L225 Difference]: With dead ends: 414 [2021-03-10 21:35:18,998 INFO L226 Difference]: Without dead ends: 382 [2021-03-10 21:35:18,998 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 240.5ms TimeCoverageRelationStatistics Valid=210, Invalid=846, Unknown=0, NotChecked=0, Total=1056 [2021-03-10 21:35:18,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2021-03-10 21:35:19,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 221. [2021-03-10 21:35:19,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 220 states have (on average 2.2409090909090907) internal successors, (493), 220 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:19,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 493 transitions. [2021-03-10 21:35:19,003 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 493 transitions. Word has length 21 [2021-03-10 21:35:19,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:35:19,003 INFO L480 AbstractCegarLoop]: Abstraction has 221 states and 493 transitions. [2021-03-10 21:35:19,003 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 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) [2021-03-10 21:35:19,003 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 493 transitions. [2021-03-10 21:35:19,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:35:19,003 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:35:19,003 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:35:19,211 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-03-10 21:35:19,211 INFO L428 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:35:19,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:35:19,211 INFO L82 PathProgramCache]: Analyzing trace with hash 2128550594, now seen corresponding path program 18 times [2021-03-10 21:35:19,211 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:35:19,212 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616916265] [2021-03-10 21:35:19,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:35:19,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:35:19,236 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:19,236 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616916265] [2021-03-10 21:35:19,236 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [161581339] [2021-03-10 21:35:19,236 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:35:19,270 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 21:35:19,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:35:19,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:35:19,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:35:19,341 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:19,341 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:35:19,341 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2021-03-10 21:35:19,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987065781] [2021-03-10 21:35:19,341 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:35:19,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:35:19,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:35:19,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:35:19,342 INFO L87 Difference]: Start difference. First operand 221 states and 493 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) [2021-03-10 21:35:19,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:35:19,656 INFO L93 Difference]: Finished difference Result 371 states and 719 transitions. [2021-03-10 21:35:19,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-10 21:35:19,656 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 [2021-03-10 21:35:19,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:35:19,658 INFO L225 Difference]: With dead ends: 371 [2021-03-10 21:35:19,658 INFO L226 Difference]: Without dead ends: 371 [2021-03-10 21:35:19,658 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 191.2ms TimeCoverageRelationStatistics Valid=173, Invalid=583, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:35:19,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2021-03-10 21:35:19,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 218. [2021-03-10 21:35:19,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 217 states have (on average 2.225806451612903) internal successors, (483), 217 states have internal predecessors, (483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:19,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 483 transitions. [2021-03-10 21:35:19,663 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 483 transitions. Word has length 21 [2021-03-10 21:35:19,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:35:19,663 INFO L480 AbstractCegarLoop]: Abstraction has 218 states and 483 transitions. [2021-03-10 21:35:19,663 INFO L481 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) [2021-03-10 21:35:19,663 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 483 transitions. [2021-03-10 21:35:19,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:35:19,663 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:35:19,663 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:35:19,880 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-03-10 21:35:19,880 INFO L428 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:35:19,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:35:19,881 INFO L82 PathProgramCache]: Analyzing trace with hash 744652512, now seen corresponding path program 19 times [2021-03-10 21:35:19,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:35:19,881 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148925478] [2021-03-10 21:35:19,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:35:19,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:35:19,915 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:19,916 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148925478] [2021-03-10 21:35:19,916 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [14206078] [2021-03-10 21:35:19,916 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:35:19,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:35:19,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:35:19,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:35:19,998 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:19,998 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:35:19,999 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2021-03-10 21:35:19,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118973206] [2021-03-10 21:35:19,999 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:35:19,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:35:19,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:35:19,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:35:19,999 INFO L87 Difference]: Start difference. First operand 218 states and 483 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) [2021-03-10 21:35:20,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:35:20,107 INFO L93 Difference]: Finished difference Result 238 states and 514 transitions. [2021-03-10 21:35:20,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:35:20,108 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 [2021-03-10 21:35:20,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:35:20,109 INFO L225 Difference]: With dead ends: 238 [2021-03-10 21:35:20,109 INFO L226 Difference]: Without dead ends: 236 [2021-03-10 21:35:20,109 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 59.5ms TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:35:20,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2021-03-10 21:35:20,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 218. [2021-03-10 21:35:20,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 217 states have (on average 2.2211981566820276) internal successors, (482), 217 states have internal predecessors, (482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:20,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 482 transitions. [2021-03-10 21:35:20,112 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 482 transitions. Word has length 21 [2021-03-10 21:35:20,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:35:20,112 INFO L480 AbstractCegarLoop]: Abstraction has 218 states and 482 transitions. [2021-03-10 21:35:20,113 INFO L481 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) [2021-03-10 21:35:20,113 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 482 transitions. [2021-03-10 21:35:20,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:35:20,113 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:35:20,113 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:35:20,327 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-03-10 21:35:20,327 INFO L428 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:35:20,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:35:20,327 INFO L82 PathProgramCache]: Analyzing trace with hash -157465486, now seen corresponding path program 20 times [2021-03-10 21:35:20,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:35:20,328 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995734905] [2021-03-10 21:35:20,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:35:20,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:35:20,354 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:20,354 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995734905] [2021-03-10 21:35:20,354 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491768686] [2021-03-10 21:35:20,354 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:35:20,368 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:35:20,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:35:20,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:35:20,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:35:20,446 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:20,446 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:35:20,446 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-03-10 21:35:20,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718974003] [2021-03-10 21:35:20,446 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:35:20,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:35:20,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:35:20,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:35:20,447 INFO L87 Difference]: Start difference. First operand 218 states and 482 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) [2021-03-10 21:35:20,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:35:20,725 INFO L93 Difference]: Finished difference Result 631 states and 1240 transitions. [2021-03-10 21:35:20,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-10 21:35:20,726 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 21:35:20,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:35:20,728 INFO L225 Difference]: With dead ends: 631 [2021-03-10 21:35:20,728 INFO L226 Difference]: Without dead ends: 631 [2021-03-10 21:35:20,728 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 179.2ms TimeCoverageRelationStatistics Valid=153, Invalid=549, Unknown=0, NotChecked=0, Total=702 [2021-03-10 21:35:20,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 631 states. [2021-03-10 21:35:20,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 631 to 263. [2021-03-10 21:35:20,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 262 states have (on average 2.267175572519084) internal successors, (594), 262 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:20,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 594 transitions. [2021-03-10 21:35:20,734 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 594 transitions. Word has length 21 [2021-03-10 21:35:20,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:35:20,734 INFO L480 AbstractCegarLoop]: Abstraction has 263 states and 594 transitions. [2021-03-10 21:35:20,734 INFO L481 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) [2021-03-10 21:35:20,734 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 594 transitions. [2021-03-10 21:35:20,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:35:20,734 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:35:20,735 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:35:20,949 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-03-10 21:35:20,949 INFO L428 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:35:20,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:35:20,949 INFO L82 PathProgramCache]: Analyzing trace with hash 545339822, now seen corresponding path program 21 times [2021-03-10 21:35:20,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:35:20,950 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517158236] [2021-03-10 21:35:20,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:35:20,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:35:20,980 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:20,980 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517158236] [2021-03-10 21:35:20,980 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903875377] [2021-03-10 21:35:20,980 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 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 [2021-03-10 21:35:20,994 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 21:35:20,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:35:20,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:35:20,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:35:21,073 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:21,074 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:35:21,074 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-03-10 21:35:21,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522540651] [2021-03-10 21:35:21,074 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:35:21,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:35:21,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:35:21,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:35:21,074 INFO L87 Difference]: Start difference. First operand 263 states and 594 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) [2021-03-10 21:35:21,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:35:21,332 INFO L93 Difference]: Finished difference Result 429 states and 858 transitions. [2021-03-10 21:35:21,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 21:35:21,332 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 21:35:21,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:35:21,333 INFO L225 Difference]: With dead ends: 429 [2021-03-10 21:35:21,333 INFO L226 Difference]: Without dead ends: 423 [2021-03-10 21:35:21,334 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 155.2ms TimeCoverageRelationStatistics Valid=133, Invalid=467, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:35:21,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2021-03-10 21:35:21,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 263. [2021-03-10 21:35:21,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 262 states have (on average 2.263358778625954) internal successors, (593), 262 states have internal predecessors, (593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:21,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 593 transitions. [2021-03-10 21:35:21,355 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 593 transitions. Word has length 21 [2021-03-10 21:35:21,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:35:21,356 INFO L480 AbstractCegarLoop]: Abstraction has 263 states and 593 transitions. [2021-03-10 21:35:21,356 INFO L481 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) [2021-03-10 21:35:21,356 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 593 transitions. [2021-03-10 21:35:21,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:35:21,357 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:35:21,357 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:35:21,571 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-03-10 21:35:21,571 INFO L428 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:35:21,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:35:21,571 INFO L82 PathProgramCache]: Analyzing trace with hash -719588038, now seen corresponding path program 22 times [2021-03-10 21:35:21,572 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:35:21,572 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984328149] [2021-03-10 21:35:21,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:35:21,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:35:21,594 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:35:21,594 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984328149] [2021-03-10 21:35:21,594 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [304311569] [2021-03-10 21:35:21,594 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:35:21,618 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:35:21,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:35:21,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:35:21,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:35:21,696 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:21,696 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:35:21,697 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-03-10 21:35:21,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062142980] [2021-03-10 21:35:21,697 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:35:21,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:35:21,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:35:21,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:35:21,698 INFO L87 Difference]: Start difference. First operand 263 states and 593 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) [2021-03-10 21:35:22,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:35:22,026 INFO L93 Difference]: Finished difference Result 520 states and 1042 transitions. [2021-03-10 21:35:22,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-10 21:35:22,026 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 21 [2021-03-10 21:35:22,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:35:22,027 INFO L225 Difference]: With dead ends: 520 [2021-03-10 21:35:22,028 INFO L226 Difference]: Without dead ends: 520 [2021-03-10 21:35:22,028 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 205.5ms TimeCoverageRelationStatistics Valid=182, Invalid=630, Unknown=0, NotChecked=0, Total=812 [2021-03-10 21:35:22,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2021-03-10 21:35:22,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 264. [2021-03-10 21:35:22,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 263 states have (on average 2.2623574144486693) internal successors, (595), 263 states have internal predecessors, (595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:22,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 595 transitions. [2021-03-10 21:35:22,032 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 595 transitions. Word has length 21 [2021-03-10 21:35:22,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:35:22,033 INFO L480 AbstractCegarLoop]: Abstraction has 264 states and 595 transitions. [2021-03-10 21:35:22,033 INFO L481 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) [2021-03-10 21:35:22,033 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 595 transitions. [2021-03-10 21:35:22,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:35:22,033 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:35:22,033 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:35:22,235 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:35:22,235 INFO L428 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:35:22,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:35:22,235 INFO L82 PathProgramCache]: Analyzing trace with hash -2103486120, now seen corresponding path program 23 times [2021-03-10 21:35:22,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:35:22,235 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784204664] [2021-03-10 21:35:22,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:35:22,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:35:22,260 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:35:22,260 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784204664] [2021-03-10 21:35:22,260 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1022652278] [2021-03-10 21:35:22,260 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:35:22,273 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-03-10 21:35:22,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:35:22,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:35:22,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:35:22,348 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:22,348 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:35:22,348 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-03-10 21:35:22,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545792182] [2021-03-10 21:35:22,348 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:35:22,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:35:22,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:35:22,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:35:22,349 INFO L87 Difference]: Start difference. First operand 264 states and 595 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) [2021-03-10 21:35:22,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:35:22,572 INFO L93 Difference]: Finished difference Result 475 states and 944 transitions. [2021-03-10 21:35:22,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 21:35:22,573 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 21 [2021-03-10 21:35:22,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:35:22,574 INFO L225 Difference]: With dead ends: 475 [2021-03-10 21:35:22,574 INFO L226 Difference]: Without dead ends: 471 [2021-03-10 21:35:22,574 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 136.2ms TimeCoverageRelationStatistics Valid=98, Invalid=364, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:35:22,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2021-03-10 21:35:22,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 266. [2021-03-10 21:35:22,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 265 states have (on average 2.2528301886792454) internal successors, (597), 265 states have internal predecessors, (597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:22,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 597 transitions. [2021-03-10 21:35:22,579 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 597 transitions. Word has length 21 [2021-03-10 21:35:22,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:35:22,579 INFO L480 AbstractCegarLoop]: Abstraction has 266 states and 597 transitions. [2021-03-10 21:35:22,579 INFO L481 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) [2021-03-10 21:35:22,579 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 597 transitions. [2021-03-10 21:35:22,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:35:22,580 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:35:22,580 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:35:22,780 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-03-10 21:35:22,780 INFO L428 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:35:22,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:35:22,781 INFO L82 PathProgramCache]: Analyzing trace with hash 374503550, now seen corresponding path program 24 times [2021-03-10 21:35:22,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:35:22,781 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540869015] [2021-03-10 21:35:22,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:35:22,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:35:22,810 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:22,810 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540869015] [2021-03-10 21:35:22,810 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [69599932] [2021-03-10 21:35:22,810 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:35:22,828 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 21:35:22,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:35:22,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:35:22,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:35:22,908 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:22,908 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:35:22,908 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-03-10 21:35:22,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418370232] [2021-03-10 21:35:22,909 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:35:22,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:35:22,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:35:22,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:35:22,909 INFO L87 Difference]: Start difference. First operand 266 states and 597 transitions. Second operand has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 11 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) [2021-03-10 21:35:23,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:35:23,290 INFO L93 Difference]: Finished difference Result 451 states and 913 transitions. [2021-03-10 21:35:23,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-03-10 21:35:23,290 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 11 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 [2021-03-10 21:35:23,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:35:23,291 INFO L225 Difference]: With dead ends: 451 [2021-03-10 21:35:23,291 INFO L226 Difference]: Without dead ends: 451 [2021-03-10 21:35:23,291 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 267.5ms TimeCoverageRelationStatistics Valid=221, Invalid=835, Unknown=0, NotChecked=0, Total=1056 [2021-03-10 21:35:23,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2021-03-10 21:35:23,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 250. [2021-03-10 21:35:23,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 249 states have (on average 2.216867469879518) internal successors, (552), 249 states have internal predecessors, (552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:23,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 552 transitions. [2021-03-10 21:35:23,295 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 552 transitions. Word has length 21 [2021-03-10 21:35:23,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:35:23,295 INFO L480 AbstractCegarLoop]: Abstraction has 250 states and 552 transitions. [2021-03-10 21:35:23,296 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 11 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) [2021-03-10 21:35:23,296 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 552 transitions. [2021-03-10 21:35:23,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:35:23,296 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:35:23,296 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:35:23,510 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:35:23,510 INFO L428 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:35:23,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:35:23,511 INFO L82 PathProgramCache]: Analyzing trace with hash 1685134910, now seen corresponding path program 25 times [2021-03-10 21:35:23,511 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:35:23,511 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273801097] [2021-03-10 21:35:23,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:35:23,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:35:23,540 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:23,542 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273801097] [2021-03-10 21:35:23,542 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817245020] [2021-03-10 21:35:23,542 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 21:35:23,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:35:23,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:35:23,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:35:23,628 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:23,629 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:35:23,629 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-03-10 21:35:23,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490340711] [2021-03-10 21:35:23,629 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:35:23,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:35:23,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:35:23,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:35:23,629 INFO L87 Difference]: Start difference. First operand 250 states and 552 transitions. Second operand has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 11 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) [2021-03-10 21:35:23,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:35:23,907 INFO L93 Difference]: Finished difference Result 408 states and 804 transitions. [2021-03-10 21:35:23,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 21:35:23,907 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 11 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 [2021-03-10 21:35:23,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:35:23,908 INFO L225 Difference]: With dead ends: 408 [2021-03-10 21:35:23,908 INFO L226 Difference]: Without dead ends: 402 [2021-03-10 21:35:23,910 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 159.4ms TimeCoverageRelationStatistics Valid=121, Invalid=479, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:35:23,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2021-03-10 21:35:23,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 254. [2021-03-10 21:35:23,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 253 states have (on average 2.205533596837945) internal successors, (558), 253 states have internal predecessors, (558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:23,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 558 transitions. [2021-03-10 21:35:23,914 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 558 transitions. Word has length 21 [2021-03-10 21:35:23,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:35:23,914 INFO L480 AbstractCegarLoop]: Abstraction has 254 states and 558 transitions. [2021-03-10 21:35:23,914 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 11 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) [2021-03-10 21:35:23,914 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 558 transitions. [2021-03-10 21:35:23,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:35:23,914 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:35:23,914 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:35:24,127 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-03-10 21:35:24,127 INFO L428 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:35:24,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:35:24,127 INFO L82 PathProgramCache]: Analyzing trace with hash 19311986, now seen corresponding path program 26 times [2021-03-10 21:35:24,128 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:35:24,128 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080509821] [2021-03-10 21:35:24,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:35:24,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:35:24,159 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:24,159 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080509821] [2021-03-10 21:35:24,159 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [444645018] [2021-03-10 21:35:24,159 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:35:24,172 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:35:24,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:35:24,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:35:24,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:35:24,259 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:24,259 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:35:24,259 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-03-10 21:35:24,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392446491] [2021-03-10 21:35:24,259 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:35:24,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:35:24,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:35:24,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:35:24,260 INFO L87 Difference]: Start difference. First operand 254 states and 558 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) [2021-03-10 21:35:24,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:35:24,650 INFO L93 Difference]: Finished difference Result 462 states and 931 transitions. [2021-03-10 21:35:24,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-03-10 21:35:24,650 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 21 [2021-03-10 21:35:24,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:35:24,651 INFO L225 Difference]: With dead ends: 462 [2021-03-10 21:35:24,651 INFO L226 Difference]: Without dead ends: 462 [2021-03-10 21:35:24,651 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 267.9ms TimeCoverageRelationStatistics Valid=221, Invalid=835, Unknown=0, NotChecked=0, Total=1056 [2021-03-10 21:35:24,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2021-03-10 21:35:24,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 243. [2021-03-10 21:35:24,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 242 states have (on average 2.1735537190082646) internal successors, (526), 242 states have internal predecessors, (526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:24,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 526 transitions. [2021-03-10 21:35:24,656 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 526 transitions. Word has length 21 [2021-03-10 21:35:24,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:35:24,656 INFO L480 AbstractCegarLoop]: Abstraction has 243 states and 526 transitions. [2021-03-10 21:35:24,656 INFO L481 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) [2021-03-10 21:35:24,656 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 526 transitions. [2021-03-10 21:35:24,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:35:24,656 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:35:24,656 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:35:24,870 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:35:24,871 INFO L428 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:35:24,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:35:24,871 INFO L82 PathProgramCache]: Analyzing trace with hash 1105347502, now seen corresponding path program 27 times [2021-03-10 21:35:24,871 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:35:24,871 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98065726] [2021-03-10 21:35:24,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:35:24,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:35:24,900 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:24,900 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98065726] [2021-03-10 21:35:24,900 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644341052] [2021-03-10 21:35:24,900 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:35:24,922 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 21:35:24,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:35:24,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:35:24,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:35:24,998 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:24,998 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:35:24,998 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-03-10 21:35:24,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290558144] [2021-03-10 21:35:24,998 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:35:24,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:35:24,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:35:24,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:35:24,999 INFO L87 Difference]: Start difference. First operand 243 states and 526 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) [2021-03-10 21:35:25,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:35:25,234 INFO L93 Difference]: Finished difference Result 331 states and 646 transitions. [2021-03-10 21:35:25,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 21:35:25,235 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 21 [2021-03-10 21:35:25,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:35:25,236 INFO L225 Difference]: With dead ends: 331 [2021-03-10 21:35:25,236 INFO L226 Difference]: Without dead ends: 322 [2021-03-10 21:35:25,236 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 164.5ms TimeCoverageRelationStatistics Valid=121, Invalid=479, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:35:25,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2021-03-10 21:35:25,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 228. [2021-03-10 21:35:25,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 227 states have (on average 2.185022026431718) internal successors, (496), 227 states have internal predecessors, (496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:25,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 496 transitions. [2021-03-10 21:35:25,240 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 496 transitions. Word has length 21 [2021-03-10 21:35:25,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:35:25,240 INFO L480 AbstractCegarLoop]: Abstraction has 228 states and 496 transitions. [2021-03-10 21:35:25,240 INFO L481 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) [2021-03-10 21:35:25,240 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 496 transitions. [2021-03-10 21:35:25,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:35:25,240 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:35:25,240 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:35:25,451 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-03-10 21:35:25,452 INFO L428 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:35:25,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:35:25,452 INFO L82 PathProgramCache]: Analyzing trace with hash -701741454, now seen corresponding path program 28 times [2021-03-10 21:35:25,452 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:35:25,452 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331243013] [2021-03-10 21:35:25,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:35:25,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:35:25,477 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:25,477 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331243013] [2021-03-10 21:35:25,477 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [806686099] [2021-03-10 21:35:25,477 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:35:25,489 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:35:25,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:35:25,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:35:25,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:35:25,552 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:25,552 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:35:25,552 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2021-03-10 21:35:25,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316692106] [2021-03-10 21:35:25,553 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:35:25,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:35:25,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:35:25,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:35:25,553 INFO L87 Difference]: Start difference. First operand 228 states and 496 transitions. Second operand has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 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) [2021-03-10 21:35:25,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:35:25,820 INFO L93 Difference]: Finished difference Result 389 states and 758 transitions. [2021-03-10 21:35:25,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-10 21:35:25,820 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 21:35:25,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:35:25,821 INFO L225 Difference]: With dead ends: 389 [2021-03-10 21:35:25,821 INFO L226 Difference]: Without dead ends: 389 [2021-03-10 21:35:25,821 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 182.6ms TimeCoverageRelationStatistics Valid=173, Invalid=583, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:35:25,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2021-03-10 21:35:25,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 228. [2021-03-10 21:35:25,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 227 states have (on average 2.1806167400881056) internal successors, (495), 227 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:25,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 495 transitions. [2021-03-10 21:35:25,825 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 495 transitions. Word has length 21 [2021-03-10 21:35:25,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:35:25,825 INFO L480 AbstractCegarLoop]: Abstraction has 228 states and 495 transitions. [2021-03-10 21:35:25,825 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 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) [2021-03-10 21:35:25,825 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 495 transitions. [2021-03-10 21:35:25,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:35:25,825 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:35:25,825 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:35:26,043 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:35:26,043 INFO L428 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:35:26,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:35:26,043 INFO L82 PathProgramCache]: Analyzing trace with hash 1063854, now seen corresponding path program 29 times [2021-03-10 21:35:26,044 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:35:26,044 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719252272] [2021-03-10 21:35:26,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:35:26,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:35:26,067 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:26,067 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719252272] [2021-03-10 21:35:26,067 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2065213179] [2021-03-10 21:35:26,067 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:35:26,080 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 21:35:26,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:35:26,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:35:26,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:35:26,148 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:26,148 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:35:26,148 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2021-03-10 21:35:26,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069308845] [2021-03-10 21:35:26,148 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:35:26,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:35:26,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:35:26,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:35:26,149 INFO L87 Difference]: Start difference. First operand 228 states and 495 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) [2021-03-10 21:35:26,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:35:26,328 INFO L93 Difference]: Finished difference Result 278 states and 563 transitions. [2021-03-10 21:35:26,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:35:26,328 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 21 [2021-03-10 21:35:26,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:35:26,329 INFO L225 Difference]: With dead ends: 278 [2021-03-10 21:35:26,329 INFO L226 Difference]: Without dead ends: 275 [2021-03-10 21:35:26,329 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 106.5ms TimeCoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:35:26,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2021-03-10 21:35:26,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 225. [2021-03-10 21:35:26,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 224 states have (on average 2.1830357142857144) internal successors, (489), 224 states have internal predecessors, (489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:26,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 489 transitions. [2021-03-10 21:35:26,332 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 489 transitions. Word has length 21 [2021-03-10 21:35:26,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:35:26,332 INFO L480 AbstractCegarLoop]: Abstraction has 225 states and 489 transitions. [2021-03-10 21:35:26,332 INFO L481 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) [2021-03-10 21:35:26,332 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 489 transitions. [2021-03-10 21:35:26,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:35:26,333 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:35:26,333 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:35:26,547 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-03-10 21:35:26,547 INFO L428 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:35:26,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:35:26,548 INFO L82 PathProgramCache]: Analyzing trace with hash -1263864006, now seen corresponding path program 30 times [2021-03-10 21:35:26,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:35:26,548 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572389905] [2021-03-10 21:35:26,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:35:26,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:35:26,577 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:26,577 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572389905] [2021-03-10 21:35:26,578 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308102859] [2021-03-10 21:35:26,578 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:35:26,591 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 21:35:26,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:35:26,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:35:26,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:35:26,653 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:26,654 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:35:26,654 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2021-03-10 21:35:26,654 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846303164] [2021-03-10 21:35:26,654 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:35:26,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:35:26,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:35:26,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:35:26,654 INFO L87 Difference]: Start difference. First operand 225 states and 489 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) [2021-03-10 21:35:26,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:35:26,928 INFO L93 Difference]: Finished difference Result 315 states and 641 transitions. [2021-03-10 21:35:26,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-10 21:35:26,928 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 [2021-03-10 21:35:26,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:35:26,929 INFO L225 Difference]: With dead ends: 315 [2021-03-10 21:35:26,929 INFO L226 Difference]: Without dead ends: 315 [2021-03-10 21:35:26,930 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 160.9ms TimeCoverageRelationStatistics Valid=152, Invalid=448, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:35:26,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2021-03-10 21:35:26,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 226. [2021-03-10 21:35:26,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 225 states have (on average 2.1822222222222223) internal successors, (491), 225 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:26,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 491 transitions. [2021-03-10 21:35:26,933 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 491 transitions. Word has length 21 [2021-03-10 21:35:26,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:35:26,933 INFO L480 AbstractCegarLoop]: Abstraction has 226 states and 491 transitions. [2021-03-10 21:35:26,933 INFO L481 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) [2021-03-10 21:35:26,933 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 491 transitions. [2021-03-10 21:35:26,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:35:26,933 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:35:26,933 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:35:27,139 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:35:27,139 INFO L428 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:35:27,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:35:27,139 INFO L82 PathProgramCache]: Analyzing trace with hash 1647205208, now seen corresponding path program 31 times [2021-03-10 21:35:27,139 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:35:27,140 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272903994] [2021-03-10 21:35:27,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:35:27,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:35:27,165 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:27,165 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272903994] [2021-03-10 21:35:27,165 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [724576603] [2021-03-10 21:35:27,165 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:35:27,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:35:27,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:35:27,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:35:27,237 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:27,238 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:35:27,238 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2021-03-10 21:35:27,238 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615784442] [2021-03-10 21:35:27,238 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:35:27,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:35:27,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:35:27,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:35:27,238 INFO L87 Difference]: Start difference. First operand 226 states and 491 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) [2021-03-10 21:35:27,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:35:27,438 INFO L93 Difference]: Finished difference Result 367 states and 714 transitions. [2021-03-10 21:35:27,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 21:35:27,439 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 [2021-03-10 21:35:27,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:35:27,440 INFO L225 Difference]: With dead ends: 367 [2021-03-10 21:35:27,440 INFO L226 Difference]: Without dead ends: 365 [2021-03-10 21:35:27,440 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 153.3ms TimeCoverageRelationStatistics Valid=135, Invalid=515, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:35:27,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2021-03-10 21:35:27,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 226. [2021-03-10 21:35:27,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 225 states have (on average 2.1777777777777776) internal successors, (490), 225 states have internal predecessors, (490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:27,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 490 transitions. [2021-03-10 21:35:27,443 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 490 transitions. Word has length 21 [2021-03-10 21:35:27,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:35:27,443 INFO L480 AbstractCegarLoop]: Abstraction has 226 states and 490 transitions. [2021-03-10 21:35:27,443 INFO L481 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) [2021-03-10 21:35:27,443 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 490 transitions. [2021-03-10 21:35:27,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:35:27,444 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:35:27,444 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:35:27,658 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-03-10 21:35:27,658 INFO L428 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:35:27,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:35:27,658 INFO L82 PathProgramCache]: Analyzing trace with hash -169772418, now seen corresponding path program 32 times [2021-03-10 21:35:27,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:35:27,659 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693366966] [2021-03-10 21:35:27,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:35:27,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:35:27,688 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:35:27,688 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693366966] [2021-03-10 21:35:27,688 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463171937] [2021-03-10 21:35:27,688 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:35:27,702 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:35:27,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:35:27,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:35:27,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:35:27,778 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:27,779 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:35:27,779 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-03-10 21:35:27,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404571128] [2021-03-10 21:35:27,779 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:35:27,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:35:27,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:35:27,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:35:27,780 INFO L87 Difference]: Start difference. First operand 226 states and 490 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) [2021-03-10 21:35:28,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:35:28,460 INFO L93 Difference]: Finished difference Result 472 states and 966 transitions. [2021-03-10 21:35:28,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-03-10 21:35:28,460 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 21 [2021-03-10 21:35:28,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:35:28,461 INFO L225 Difference]: With dead ends: 472 [2021-03-10 21:35:28,461 INFO L226 Difference]: Without dead ends: 472 [2021-03-10 21:35:28,462 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 793 ImplicationChecksByTransitivity, 469.3ms TimeCoverageRelationStatistics Valid=565, Invalid=2191, Unknown=0, NotChecked=0, Total=2756 [2021-03-10 21:35:28,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2021-03-10 21:35:28,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 230. [2021-03-10 21:35:28,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 229 states have (on average 2.1746724890829694) internal successors, (498), 229 states have internal predecessors, (498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:28,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 498 transitions. [2021-03-10 21:35:28,465 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 498 transitions. Word has length 21 [2021-03-10 21:35:28,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:35:28,465 INFO L480 AbstractCegarLoop]: Abstraction has 230 states and 498 transitions. [2021-03-10 21:35:28,465 INFO L481 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) [2021-03-10 21:35:28,465 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 498 transitions. [2021-03-10 21:35:28,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:35:28,466 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:35:28,466 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:35:28,671 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-03-10 21:35:28,671 INFO L428 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:35:28,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:35:28,672 INFO L82 PathProgramCache]: Analyzing trace with hash 1140858942, now seen corresponding path program 33 times [2021-03-10 21:35:28,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:35:28,672 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54373199] [2021-03-10 21:35:28,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:35:28,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:35:28,695 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:35:28,695 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54373199] [2021-03-10 21:35:28,695 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909803158] [2021-03-10 21:35:28,695 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 21:35:28,713 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 21:35:28,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:35:28,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:35:28,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:35:28,779 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:28,779 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:35:28,779 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-03-10 21:35:28,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178466783] [2021-03-10 21:35:28,779 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:35:28,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:35:28,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:35:28,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:35:28,780 INFO L87 Difference]: Start difference. First operand 230 states and 498 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) [2021-03-10 21:35:29,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:35:29,087 INFO L93 Difference]: Finished difference Result 418 states and 797 transitions. [2021-03-10 21:35:29,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-03-10 21:35:29,088 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 21 [2021-03-10 21:35:29,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:35:29,089 INFO L225 Difference]: With dead ends: 418 [2021-03-10 21:35:29,089 INFO L226 Difference]: Without dead ends: 398 [2021-03-10 21:35:29,089 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 224.4ms TimeCoverageRelationStatistics Valid=196, Invalid=860, Unknown=0, NotChecked=0, Total=1056 [2021-03-10 21:35:29,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2021-03-10 21:35:29,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 230. [2021-03-10 21:35:29,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 229 states have (on average 2.1572052401746724) internal successors, (494), 229 states have internal predecessors, (494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:29,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 494 transitions. [2021-03-10 21:35:29,092 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 494 transitions. Word has length 21 [2021-03-10 21:35:29,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:35:29,092 INFO L480 AbstractCegarLoop]: Abstraction has 230 states and 494 transitions. [2021-03-10 21:35:29,092 INFO L481 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) [2021-03-10 21:35:29,092 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 494 transitions. [2021-03-10 21:35:29,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:35:29,093 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:35:29,093 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:35:29,307 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-03-10 21:35:29,307 INFO L428 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:35:29,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:35:29,307 INFO L82 PathProgramCache]: Analyzing trace with hash -1900542150, now seen corresponding path program 34 times [2021-03-10 21:35:29,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:35:29,307 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034433401] [2021-03-10 21:35:29,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:35:29,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:35:29,335 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:29,335 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034433401] [2021-03-10 21:35:29,335 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1910115782] [2021-03-10 21:35:29,335 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:35:29,353 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:35:29,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:35:29,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:35:29,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:35:29,425 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:29,425 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:35:29,425 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-03-10 21:35:29,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246106918] [2021-03-10 21:35:29,425 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:35:29,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:35:29,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:35:29,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:35:29,426 INFO L87 Difference]: Start difference. First operand 230 states and 494 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) [2021-03-10 21:35:30,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:35:30,044 INFO L93 Difference]: Finished difference Result 394 states and 828 transitions. [2021-03-10 21:35:30,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-03-10 21:35:30,044 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 21 [2021-03-10 21:35:30,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:35:30,045 INFO L225 Difference]: With dead ends: 394 [2021-03-10 21:35:30,045 INFO L226 Difference]: Without dead ends: 392 [2021-03-10 21:35:30,046 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 456.4ms TimeCoverageRelationStatistics Valid=406, Invalid=1400, Unknown=0, NotChecked=0, Total=1806 [2021-03-10 21:35:30,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2021-03-10 21:35:30,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 227. [2021-03-10 21:35:30,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 226 states have (on average 2.1548672566371683) internal successors, (487), 226 states have internal predecessors, (487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:30,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 487 transitions. [2021-03-10 21:35:30,049 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 487 transitions. Word has length 21 [2021-03-10 21:35:30,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:35:30,049 INFO L480 AbstractCegarLoop]: Abstraction has 227 states and 487 transitions. [2021-03-10 21:35:30,049 INFO L481 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) [2021-03-10 21:35:30,049 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 487 transitions. [2021-03-10 21:35:30,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:35:30,049 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:35:30,049 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:35:30,250 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-03-10 21:35:30,250 INFO L428 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:35:30,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:35:30,250 INFO L82 PathProgramCache]: Analyzing trace with hash 913637562, now seen corresponding path program 35 times [2021-03-10 21:35:30,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:35:30,250 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142688573] [2021-03-10 21:35:30,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:35:30,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:35:30,280 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:30,280 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142688573] [2021-03-10 21:35:30,280 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1746029585] [2021-03-10 21:35:30,280 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 [2021-03-10 21:35:30,294 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 21:35:30,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:35:30,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:35:30,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:35:30,358 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:30,359 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:35:30,359 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-03-10 21:35:30,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118667430] [2021-03-10 21:35:30,359 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:35:30,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:35:30,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:35:30,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:35:30,359 INFO L87 Difference]: Start difference. First operand 227 states and 487 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) [2021-03-10 21:35:30,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:35:30,620 INFO L93 Difference]: Finished difference Result 340 states and 660 transitions. [2021-03-10 21:35:30,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-10 21:35:30,620 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 21 [2021-03-10 21:35:30,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:35:30,621 INFO L225 Difference]: With dead ends: 340 [2021-03-10 21:35:30,621 INFO L226 Difference]: Without dead ends: 330 [2021-03-10 21:35:30,622 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 218.8ms TimeCoverageRelationStatistics Valid=169, Invalid=701, Unknown=0, NotChecked=0, Total=870 [2021-03-10 21:35:30,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2021-03-10 21:35:30,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 227. [2021-03-10 21:35:30,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 226 states have (on average 2.1371681415929205) internal successors, (483), 226 states have internal predecessors, (483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:30,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 483 transitions. [2021-03-10 21:35:30,624 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 483 transitions. Word has length 21 [2021-03-10 21:35:30,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:35:30,624 INFO L480 AbstractCegarLoop]: Abstraction has 227 states and 483 transitions. [2021-03-10 21:35:30,624 INFO L481 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) [2021-03-10 21:35:30,625 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 483 transitions. [2021-03-10 21:35:30,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-03-10 21:35:30,625 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:35:30,625 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:35:30,831 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-03-10 21:35:30,831 INFO L428 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:35:30,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:35:30,831 INFO L82 PathProgramCache]: Analyzing trace with hash -459784912, now seen corresponding path program 36 times [2021-03-10 21:35:30,831 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:35:30,831 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587329547] [2021-03-10 21:35:30,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:35:30,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:35:30,864 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:30,864 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587329547] [2021-03-10 21:35:30,864 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1675840263] [2021-03-10 21:35:30,864 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 [2021-03-10 21:35:30,878 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 21:35:30,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:35:30,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:35:30,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:35:30,981 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:30,981 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:35:30,981 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 8] total 8 [2021-03-10 21:35:30,981 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861843796] [2021-03-10 21:35:30,981 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 21:35:30,981 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:35:30,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 21:35:30,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:35:30,981 INFO L87 Difference]: Start difference. First operand 227 states and 483 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) [2021-03-10 21:35:31,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:35:31,116 INFO L93 Difference]: Finished difference Result 364 states and 746 transitions. [2021-03-10 21:35:31,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 21:35:31,116 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 23 [2021-03-10 21:35:31,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:35:31,117 INFO L225 Difference]: With dead ends: 364 [2021-03-10 21:35:31,117 INFO L226 Difference]: Without dead ends: 357 [2021-03-10 21:35:31,118 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 5 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 69.1ms TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:35:31,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2021-03-10 21:35:31,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 296. [2021-03-10 21:35:31,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 295 states have (on average 2.1796610169491526) internal successors, (643), 295 states have internal predecessors, (643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:31,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 643 transitions. [2021-03-10 21:35:31,122 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 643 transitions. Word has length 23 [2021-03-10 21:35:31,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:35:31,122 INFO L480 AbstractCegarLoop]: Abstraction has 296 states and 643 transitions. [2021-03-10 21:35:31,123 INFO L481 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) [2021-03-10 21:35:31,123 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 643 transitions. [2021-03-10 21:35:31,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-03-10 21:35:31,123 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:35:31,123 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:35:31,326 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-03-10 21:35:31,327 INFO L428 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:35:31,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:35:31,327 INFO L82 PathProgramCache]: Analyzing trace with hash 1734689328, now seen corresponding path program 37 times [2021-03-10 21:35:31,327 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:35:31,327 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955314605] [2021-03-10 21:35:31,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:35:31,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:35:31,360 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:35:31,360 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955314605] [2021-03-10 21:35:31,360 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140349113] [2021-03-10 21:35:31,360 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 [2021-03-10 21:35:31,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:35:31,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:35:31,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:35:31,499 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:31,499 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:35:31,499 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 8] total 9 [2021-03-10 21:35:31,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246106823] [2021-03-10 21:35:31,500 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:35:31,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:35:31,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:35:31,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:35:31,500 INFO L87 Difference]: Start difference. First operand 296 states and 643 transitions. Second operand has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 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) [2021-03-10 21:35:31,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:35:31,635 INFO L93 Difference]: Finished difference Result 431 states and 902 transitions. [2021-03-10 21:35:31,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:35:31,636 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 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 [2021-03-10 21:35:31,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:35:31,639 INFO L225 Difference]: With dead ends: 431 [2021-03-10 21:35:31,639 INFO L226 Difference]: Without dead ends: 417 [2021-03-10 21:35:31,639 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 5 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 82.6ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:35:31,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2021-03-10 21:35:31,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 324. [2021-03-10 21:35:31,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 323 states have (on average 2.2321981424148607) internal successors, (721), 323 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) [2021-03-10 21:35:31,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 721 transitions. [2021-03-10 21:35:31,643 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 721 transitions. Word has length 23 [2021-03-10 21:35:31,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:35:31,643 INFO L480 AbstractCegarLoop]: Abstraction has 324 states and 721 transitions. [2021-03-10 21:35:31,643 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 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) [2021-03-10 21:35:31,643 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 721 transitions. [2021-03-10 21:35:31,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-03-10 21:35:31,643 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:35:31,643 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:35:31,858 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-03-10 21:35:31,858 INFO L428 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:35:31,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:35:31,858 INFO L82 PathProgramCache]: Analyzing trace with hash 1856120112, now seen corresponding path program 38 times [2021-03-10 21:35:31,858 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:35:31,858 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431761252] [2021-03-10 21:35:31,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:35:31,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:35:31,890 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:35:31,890 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431761252] [2021-03-10 21:35:31,890 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1974206075] [2021-03-10 21:35:31,890 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 [2021-03-10 21:35:31,910 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:35:31,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:35:31,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:35:31,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:35:32,108 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:32,109 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:35:32,109 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 8] total 10 [2021-03-10 21:35:32,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752250846] [2021-03-10 21:35:32,109 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:35:32,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:35:32,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:35:32,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:35:32,109 INFO L87 Difference]: Start difference. First operand 324 states and 721 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) [2021-03-10 21:35:32,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:35:32,294 INFO L93 Difference]: Finished difference Result 495 states and 1049 transitions. [2021-03-10 21:35:32,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:35:32,295 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 23 [2021-03-10 21:35:32,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:35:32,296 INFO L225 Difference]: With dead ends: 495 [2021-03-10 21:35:32,296 INFO L226 Difference]: Without dead ends: 481 [2021-03-10 21:35:32,296 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 103.4ms TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:35:32,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 481 states. [2021-03-10 21:35:32,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 481 to 356. [2021-03-10 21:35:32,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 356 states, 355 states have (on average 2.267605633802817) internal successors, (805), 355 states have internal predecessors, (805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:32,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 805 transitions. [2021-03-10 21:35:32,301 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 805 transitions. Word has length 23 [2021-03-10 21:35:32,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:35:32,301 INFO L480 AbstractCegarLoop]: Abstraction has 356 states and 805 transitions. [2021-03-10 21:35:32,301 INFO L481 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) [2021-03-10 21:35:32,301 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 805 transitions. [2021-03-10 21:35:32,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-03-10 21:35:32,301 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:35:32,301 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:35:32,514 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:35:32,514 INFO L428 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:35:32,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:35:32,514 INFO L82 PathProgramCache]: Analyzing trace with hash -1707980752, now seen corresponding path program 39 times [2021-03-10 21:35:32,515 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:35:32,515 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857029722] [2021-03-10 21:35:32,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:35:32,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:35:32,548 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:35:32,548 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857029722] [2021-03-10 21:35:32,548 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [39472203] [2021-03-10 21:35:32,548 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) [2021-03-10 21:35:32,569 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 21:35:32,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:35:32,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:35:32,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:35:32,689 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:32,689 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:35:32,690 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 8] total 8 [2021-03-10 21:35:32,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590467270] [2021-03-10 21:35:32,690 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 21:35:32,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:35:32,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 21:35:32,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:35:32,691 INFO L87 Difference]: Start difference. First operand 356 states and 805 transitions. Second operand has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 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) [2021-03-10 21:35:32,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:35:32,823 INFO L93 Difference]: Finished difference Result 482 states and 1047 transitions. [2021-03-10 21:35:32,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 21:35:32,823 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 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 [2021-03-10 21:35:32,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:35:32,824 INFO L225 Difference]: With dead ends: 482 [2021-03-10 21:35:32,824 INFO L226 Difference]: Without dead ends: 475 [2021-03-10 21:35:32,825 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 5 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 74.7ms TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:35:32,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2021-03-10 21:35:32,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 404. [2021-03-10 21:35:32,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 404 states, 403 states have (on average 2.2853598014888337) internal successors, (921), 403 states have internal predecessors, (921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:32,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 921 transitions. [2021-03-10 21:35:32,829 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 921 transitions. Word has length 23 [2021-03-10 21:35:32,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:35:32,829 INFO L480 AbstractCegarLoop]: Abstraction has 404 states and 921 transitions. [2021-03-10 21:35:32,829 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 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) [2021-03-10 21:35:32,829 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 921 transitions. [2021-03-10 21:35:32,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:35:32,830 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:35:32,830 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:35:33,035 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:35:33,035 INFO L428 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:35:33,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:35:33,035 INFO L82 PathProgramCache]: Analyzing trace with hash 942134834, now seen corresponding path program 40 times [2021-03-10 21:35:33,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:35:33,035 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142565755] [2021-03-10 21:35:33,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:35:33,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:35:33,088 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:33,088 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142565755] [2021-03-10 21:35:33,088 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [835260067] [2021-03-10 21:35:33,088 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 [2021-03-10 21:35:33,104 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:35:33,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:35:33,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:35:33,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:35:33,230 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:33,230 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:35:33,230 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 21:35:33,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963536711] [2021-03-10 21:35:33,230 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:35:33,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:35:33,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:35:33,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:35:33,231 INFO L87 Difference]: Start difference. First operand 404 states and 921 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) [2021-03-10 21:35:34,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:35:34,797 INFO L93 Difference]: Finished difference Result 869 states and 1808 transitions. [2021-03-10 21:35:34,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-03-10 21:35:34,797 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 [2021-03-10 21:35:34,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:35:34,800 INFO L225 Difference]: With dead ends: 869 [2021-03-10 21:35:34,800 INFO L226 Difference]: Without dead ends: 869 [2021-03-10 21:35:34,801 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1358 ImplicationChecksByTransitivity, 1147.9ms TimeCoverageRelationStatistics Valid=1023, Invalid=4233, Unknown=0, NotChecked=0, Total=5256 [2021-03-10 21:35:34,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 869 states. [2021-03-10 21:35:34,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 869 to 330. [2021-03-10 21:35:34,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 329 states have (on average 2.2674772036474162) internal successors, (746), 329 states have internal predecessors, (746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:34,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 746 transitions. [2021-03-10 21:35:34,806 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 746 transitions. Word has length 25 [2021-03-10 21:35:34,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:35:34,806 INFO L480 AbstractCegarLoop]: Abstraction has 330 states and 746 transitions. [2021-03-10 21:35:34,806 INFO L481 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) [2021-03-10 21:35:34,806 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 746 transitions. [2021-03-10 21:35:34,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:35:34,806 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:35:34,806 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:35:35,007 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:35:35,007 INFO L428 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:35:35,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:35:35,007 INFO L82 PathProgramCache]: Analyzing trace with hash -394924434, now seen corresponding path program 41 times [2021-03-10 21:35:35,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:35:35,007 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480210770] [2021-03-10 21:35:35,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:35:35,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:35:35,058 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:35,058 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480210770] [2021-03-10 21:35:35,058 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941550777] [2021-03-10 21:35:35,058 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:35:35,075 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 21:35:35,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:35:35,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:35:35,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:35:35,175 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:35,176 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:35:35,176 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 21:35:35,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196821301] [2021-03-10 21:35:35,176 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:35:35,176 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:35:35,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:35:35,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:35:35,176 INFO L87 Difference]: Start difference. First operand 330 states and 746 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) [2021-03-10 21:35:35,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:35:35,933 INFO L93 Difference]: Finished difference Result 766 states and 1462 transitions. [2021-03-10 21:35:35,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-03-10 21:35:35,933 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 [2021-03-10 21:35:35,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:35:35,935 INFO L225 Difference]: With dead ends: 766 [2021-03-10 21:35:35,935 INFO L226 Difference]: Without dead ends: 710 [2021-03-10 21:35:35,935 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 796 ImplicationChecksByTransitivity, 608.8ms TimeCoverageRelationStatistics Valid=540, Invalid=2430, Unknown=0, NotChecked=0, Total=2970 [2021-03-10 21:35:35,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 710 states. [2021-03-10 21:35:35,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 710 to 406. [2021-03-10 21:35:35,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 405 states have (on average 2.246913580246914) internal successors, (910), 405 states have internal predecessors, (910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:35,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 910 transitions. [2021-03-10 21:35:35,940 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 910 transitions. Word has length 25 [2021-03-10 21:35:35,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:35:35,940 INFO L480 AbstractCegarLoop]: Abstraction has 406 states and 910 transitions. [2021-03-10 21:35:35,941 INFO L481 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) [2021-03-10 21:35:35,941 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 910 transitions. [2021-03-10 21:35:35,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:35:35,941 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:35:35,941 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:35:36,155 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-03-10 21:35:36,156 INFO L428 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:35:36,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:35:36,156 INFO L82 PathProgramCache]: Analyzing trace with hash 1298777542, now seen corresponding path program 42 times [2021-03-10 21:35:36,156 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:35:36,156 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709486029] [2021-03-10 21:35:36,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:35:36,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:35:36,185 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:36,186 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709486029] [2021-03-10 21:35:36,186 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012586043] [2021-03-10 21:35:36,186 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 [2021-03-10 21:35:36,199 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 21:35:36,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:35:36,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:35:36,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:35:36,290 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:36,291 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:35:36,291 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 11 [2021-03-10 21:35:36,291 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510091902] [2021-03-10 21:35:36,291 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:35:36,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:35:36,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:35:36,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:35:36,291 INFO L87 Difference]: Start difference. First operand 406 states and 910 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) [2021-03-10 21:35:36,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:35:36,796 INFO L93 Difference]: Finished difference Result 728 states and 1423 transitions. [2021-03-10 21:35:36,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-03-10 21:35:36,796 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 [2021-03-10 21:35:36,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:35:36,798 INFO L225 Difference]: With dead ends: 728 [2021-03-10 21:35:36,798 INFO L226 Difference]: Without dead ends: 728 [2021-03-10 21:35:36,799 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 558 ImplicationChecksByTransitivity, 372.7ms TimeCoverageRelationStatistics Valid=340, Invalid=1552, Unknown=0, NotChecked=0, Total=1892 [2021-03-10 21:35:36,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 728 states. [2021-03-10 21:35:36,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 728 to 402. [2021-03-10 21:35:36,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 401 states have (on average 2.2369077306733165) internal successors, (897), 401 states have internal predecessors, (897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:36,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 897 transitions. [2021-03-10 21:35:36,804 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 897 transitions. Word has length 25 [2021-03-10 21:35:36,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:35:36,804 INFO L480 AbstractCegarLoop]: Abstraction has 402 states and 897 transitions. [2021-03-10 21:35:36,804 INFO L481 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) [2021-03-10 21:35:36,804 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 897 transitions. [2021-03-10 21:35:36,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:35:36,805 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:35:36,805 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:35:37,005 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:35:37,005 INFO L428 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:35:37,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:35:37,005 INFO L82 PathProgramCache]: Analyzing trace with hash -85120540, now seen corresponding path program 43 times [2021-03-10 21:35:37,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:35:37,005 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768646936] [2021-03-10 21:35:37,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:35:37,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:35:37,035 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:37,035 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768646936] [2021-03-10 21:35:37,035 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735062216] [2021-03-10 21:35:37,035 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 21:35:37,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:35:37,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:35:37,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:35:37,143 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:37,143 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:35:37,144 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 11 [2021-03-10 21:35:37,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313869000] [2021-03-10 21:35:37,144 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:35:37,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:35:37,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:35:37,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:35:37,144 INFO L87 Difference]: Start difference. First operand 402 states and 897 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) [2021-03-10 21:35:37,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:35:37,288 INFO L93 Difference]: Finished difference Result 437 states and 953 transitions. [2021-03-10 21:35:37,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:35:37,288 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 [2021-03-10 21:35:37,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:35:37,289 INFO L225 Difference]: With dead ends: 437 [2021-03-10 21:35:37,289 INFO L226 Difference]: Without dead ends: 435 [2021-03-10 21:35:37,290 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 83.0ms TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:35:37,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2021-03-10 21:35:37,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 402. [2021-03-10 21:35:37,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 401 states have (on average 2.2344139650872816) internal successors, (896), 401 states have internal predecessors, (896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:37,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 896 transitions. [2021-03-10 21:35:37,294 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 896 transitions. Word has length 25 [2021-03-10 21:35:37,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:35:37,294 INFO L480 AbstractCegarLoop]: Abstraction has 402 states and 896 transitions. [2021-03-10 21:35:37,294 INFO L481 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) [2021-03-10 21:35:37,294 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 896 transitions. [2021-03-10 21:35:37,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:35:37,294 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:35:37,294 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:35:37,495 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:35:37,495 INFO L428 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:35:37,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:35:37,495 INFO L82 PathProgramCache]: Analyzing trace with hash -1036927438, now seen corresponding path program 44 times [2021-03-10 21:35:37,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:35:37,495 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692578241] [2021-03-10 21:35:37,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:35:37,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:35:37,526 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:37,526 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692578241] [2021-03-10 21:35:37,526 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1174627972] [2021-03-10 21:35:37,526 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 [2021-03-10 21:35:37,540 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:35:37,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:35:37,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:35:37,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:35:37,644 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:37,644 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:35:37,644 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 12 [2021-03-10 21:35:37,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170622695] [2021-03-10 21:35:37,644 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:35:37,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:35:37,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:35:37,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:35:37,645 INFO L87 Difference]: Start difference. First operand 402 states and 896 transitions. Second operand has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 12 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) [2021-03-10 21:35:38,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:35:38,410 INFO L93 Difference]: Finished difference Result 1175 states and 2298 transitions. [2021-03-10 21:35:38,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-03-10 21:35:38,411 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 12 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 [2021-03-10 21:35:38,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:35:38,413 INFO L225 Difference]: With dead ends: 1175 [2021-03-10 21:35:38,413 INFO L226 Difference]: Without dead ends: 1175 [2021-03-10 21:35:38,414 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 897 ImplicationChecksByTransitivity, 513.7ms TimeCoverageRelationStatistics Valid=501, Invalid=2469, Unknown=0, NotChecked=0, Total=2970 [2021-03-10 21:35:38,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1175 states. [2021-03-10 21:35:38,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1175 to 477. [2021-03-10 21:35:38,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 477 states, 476 states have (on average 2.2668067226890756) internal successors, (1079), 476 states have internal predecessors, (1079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:38,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 1079 transitions. [2021-03-10 21:35:38,421 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 1079 transitions. Word has length 25 [2021-03-10 21:35:38,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:35:38,421 INFO L480 AbstractCegarLoop]: Abstraction has 477 states and 1079 transitions. [2021-03-10 21:35:38,421 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 12 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) [2021-03-10 21:35:38,421 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 1079 transitions. [2021-03-10 21:35:38,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:35:38,422 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:35:38,422 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:35:38,636 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-03-10 21:35:38,636 INFO L428 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:35:38,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:35:38,636 INFO L82 PathProgramCache]: Analyzing trace with hash -334122130, now seen corresponding path program 45 times [2021-03-10 21:35:38,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:35:38,636 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352596913] [2021-03-10 21:35:38,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:35:38,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:35:38,669 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:38,669 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352596913] [2021-03-10 21:35:38,669 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [251204414] [2021-03-10 21:35:38,669 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 [2021-03-10 21:35:38,683 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-10 21:35:38,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:35:38,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:35:38,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:35:38,788 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:38,789 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:35:38,789 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 12 [2021-03-10 21:35:38,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667649441] [2021-03-10 21:35:38,789 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:35:38,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:35:38,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:35:38,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:35:38,789 INFO L87 Difference]: Start difference. First operand 477 states and 1079 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:39,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:35:39,331 INFO L93 Difference]: Finished difference Result 822 states and 1640 transitions. [2021-03-10 21:35:39,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-03-10 21:35:39,331 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:35:39,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:35:39,333 INFO L225 Difference]: With dead ends: 822 [2021-03-10 21:35:39,333 INFO L226 Difference]: Without dead ends: 816 [2021-03-10 21:35:39,334 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 517 ImplicationChecksByTransitivity, 364.7ms TimeCoverageRelationStatistics Valid=321, Invalid=1571, Unknown=0, NotChecked=0, Total=1892 [2021-03-10 21:35:39,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 816 states. [2021-03-10 21:35:39,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 816 to 477. [2021-03-10 21:35:39,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 477 states, 476 states have (on average 2.264705882352941) internal successors, (1078), 476 states have internal predecessors, (1078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:39,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 1078 transitions. [2021-03-10 21:35:39,339 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 1078 transitions. Word has length 25 [2021-03-10 21:35:39,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:35:39,339 INFO L480 AbstractCegarLoop]: Abstraction has 477 states and 1078 transitions. [2021-03-10 21:35:39,340 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:39,340 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 1078 transitions. [2021-03-10 21:35:39,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:35:39,340 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:35:39,340 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:35:39,543 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-03-10 21:35:39,543 INFO L428 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:35:39,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:35:39,543 INFO L82 PathProgramCache]: Analyzing trace with hash -1599049990, now seen corresponding path program 46 times [2021-03-10 21:35:39,543 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:35:39,543 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250605469] [2021-03-10 21:35:39,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:35:39,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:35:39,572 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:35:39,572 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250605469] [2021-03-10 21:35:39,572 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027252566] [2021-03-10 21:35:39,572 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 [2021-03-10 21:35:39,587 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:35:39,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:35:39,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:35:39,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:35:39,691 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:39,691 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:35:39,691 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 12 [2021-03-10 21:35:39,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805145191] [2021-03-10 21:35:39,692 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:35:39,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:35:39,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:35:39,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:35:39,692 INFO L87 Difference]: Start difference. First operand 477 states and 1078 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) [2021-03-10 21:35:40,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:35:40,351 INFO L93 Difference]: Finished difference Result 994 states and 1984 transitions. [2021-03-10 21:35:40,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-03-10 21:35:40,352 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 [2021-03-10 21:35:40,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:35:40,354 INFO L225 Difference]: With dead ends: 994 [2021-03-10 21:35:40,354 INFO L226 Difference]: Without dead ends: 994 [2021-03-10 21:35:40,355 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 700 ImplicationChecksByTransitivity, 434.4ms TimeCoverageRelationStatistics Valid=398, Invalid=1954, Unknown=0, NotChecked=0, Total=2352 [2021-03-10 21:35:40,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 994 states. [2021-03-10 21:35:40,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 994 to 478. [2021-03-10 21:35:40,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 478 states, 477 states have (on average 2.2641509433962264) internal successors, (1080), 477 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:40,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 478 states to 478 states and 1080 transitions. [2021-03-10 21:35:40,362 INFO L78 Accepts]: Start accepts. Automaton has 478 states and 1080 transitions. Word has length 25 [2021-03-10 21:35:40,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:35:40,362 INFO L480 AbstractCegarLoop]: Abstraction has 478 states and 1080 transitions. [2021-03-10 21:35:40,362 INFO L481 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) [2021-03-10 21:35:40,362 INFO L276 IsEmpty]: Start isEmpty. Operand 478 states and 1080 transitions. [2021-03-10 21:35:40,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:35:40,362 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:35:40,362 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:35:40,563 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-03-10 21:35:40,563 INFO L428 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:35:40,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:35:40,563 INFO L82 PathProgramCache]: Analyzing trace with hash 1312019224, now seen corresponding path program 47 times [2021-03-10 21:35:40,563 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:35:40,563 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531539916] [2021-03-10 21:35:40,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:35:40,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:35:40,595 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:35:40,595 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531539916] [2021-03-10 21:35:40,596 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1768414246] [2021-03-10 21:35:40,596 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 [2021-03-10 21:35:40,609 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-03-10 21:35:40,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:35:40,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:35:40,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:35:40,721 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:40,722 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:35:40,722 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 12 [2021-03-10 21:35:40,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942885555] [2021-03-10 21:35:40,722 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:35:40,722 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:35:40,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:35:40,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:35:40,722 INFO L87 Difference]: Start difference. First operand 478 states and 1080 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) [2021-03-10 21:35:41,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:35:41,282 INFO L93 Difference]: Finished difference Result 891 states and 1769 transitions. [2021-03-10 21:35:41,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-03-10 21:35:41,282 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 [2021-03-10 21:35:41,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:35:41,284 INFO L225 Difference]: With dead ends: 891 [2021-03-10 21:35:41,284 INFO L226 Difference]: Without dead ends: 887 [2021-03-10 21:35:41,284 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 426 ImplicationChecksByTransitivity, 359.5ms TimeCoverageRelationStatistics Valid=265, Invalid=1375, Unknown=0, NotChecked=0, Total=1640 [2021-03-10 21:35:41,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 887 states. [2021-03-10 21:35:41,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 887 to 480. [2021-03-10 21:35:41,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 480 states, 479 states have (on average 2.258872651356994) internal successors, (1082), 479 states have internal predecessors, (1082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:41,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 480 states to 480 states and 1082 transitions. [2021-03-10 21:35:41,290 INFO L78 Accepts]: Start accepts. Automaton has 480 states and 1082 transitions. Word has length 25 [2021-03-10 21:35:41,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:35:41,290 INFO L480 AbstractCegarLoop]: Abstraction has 480 states and 1082 transitions. [2021-03-10 21:35:41,290 INFO L481 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) [2021-03-10 21:35:41,290 INFO L276 IsEmpty]: Start isEmpty. Operand 480 states and 1082 transitions. [2021-03-10 21:35:41,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:35:41,291 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:35:41,291 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:35:41,505 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:35:41,506 INFO L428 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:35:41,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:35:41,506 INFO L82 PathProgramCache]: Analyzing trace with hash -504958402, now seen corresponding path program 48 times [2021-03-10 21:35:41,506 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:35:41,506 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962173516] [2021-03-10 21:35:41,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:35:41,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:35:41,540 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:41,541 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962173516] [2021-03-10 21:35:41,541 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786243772] [2021-03-10 21:35:41,541 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 [2021-03-10 21:35:41,554 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-03-10 21:35:41,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:35:41,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:35:41,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:35:41,674 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:41,675 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:35:41,675 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-03-10 21:35:41,675 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472559134] [2021-03-10 21:35:41,675 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:35:41,675 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:35:41,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:35:41,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:35:41,675 INFO L87 Difference]: Start difference. First operand 480 states and 1082 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) [2021-03-10 21:35:42,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:35:42,527 INFO L93 Difference]: Finished difference Result 903 states and 1798 transitions. [2021-03-10 21:35:42,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-03-10 21:35:42,528 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 [2021-03-10 21:35:42,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:35:42,530 INFO L225 Difference]: With dead ends: 903 [2021-03-10 21:35:42,530 INFO L226 Difference]: Without dead ends: 903 [2021-03-10 21:35:42,530 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1016 ImplicationChecksByTransitivity, 595.0ms TimeCoverageRelationStatistics Valid=513, Invalid=2679, Unknown=0, NotChecked=0, Total=3192 [2021-03-10 21:35:42,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 903 states. [2021-03-10 21:35:42,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 903 to 464. [2021-03-10 21:35:42,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 464 states, 463 states have (on average 2.239740820734341) internal successors, (1037), 463 states have internal predecessors, (1037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:42,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 1037 transitions. [2021-03-10 21:35:42,539 INFO L78 Accepts]: Start accepts. Automaton has 464 states and 1037 transitions. Word has length 25 [2021-03-10 21:35:42,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:35:42,539 INFO L480 AbstractCegarLoop]: Abstraction has 464 states and 1037 transitions. [2021-03-10 21:35:42,539 INFO L481 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) [2021-03-10 21:35:42,539 INFO L276 IsEmpty]: Start isEmpty. Operand 464 states and 1037 transitions. [2021-03-10 21:35:42,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:35:42,540 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:35:42,540 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:35:42,740 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:35:42,740 INFO L428 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:35:42,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:35:42,741 INFO L82 PathProgramCache]: Analyzing trace with hash 805672958, now seen corresponding path program 49 times [2021-03-10 21:35:42,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:35:42,741 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795321019] [2021-03-10 21:35:42,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:35:42,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:35:42,776 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:42,776 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795321019] [2021-03-10 21:35:42,776 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [935163302] [2021-03-10 21:35:42,776 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 [2021-03-10 21:35:42,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:35:42,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:35:42,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:35:42,897 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:42,897 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:35:42,897 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-03-10 21:35:42,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879862025] [2021-03-10 21:35:42,897 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:35:42,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:35:42,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:35:42,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:35:42,898 INFO L87 Difference]: Start difference. First operand 464 states and 1037 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) [2021-03-10 21:35:43,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:35:43,504 INFO L93 Difference]: Finished difference Result 827 states and 1634 transitions. [2021-03-10 21:35:43,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-03-10 21:35:43,505 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 [2021-03-10 21:35:43,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:35:43,507 INFO L225 Difference]: With dead ends: 827 [2021-03-10 21:35:43,507 INFO L226 Difference]: Without dead ends: 821 [2021-03-10 21:35:43,507 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 540 ImplicationChecksByTransitivity, 409.6ms TimeCoverageRelationStatistics Valid=334, Invalid=1736, Unknown=0, NotChecked=0, Total=2070 [2021-03-10 21:35:43,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 821 states. [2021-03-10 21:35:43,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 821 to 468. [2021-03-10 21:35:43,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 468 states, 467 states have (on average 2.233404710920771) internal successors, (1043), 467 states have internal predecessors, (1043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:43,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 468 states to 468 states and 1043 transitions. [2021-03-10 21:35:43,513 INFO L78 Accepts]: Start accepts. Automaton has 468 states and 1043 transitions. Word has length 25 [2021-03-10 21:35:43,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:35:43,513 INFO L480 AbstractCegarLoop]: Abstraction has 468 states and 1043 transitions. [2021-03-10 21:35:43,513 INFO L481 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) [2021-03-10 21:35:43,513 INFO L276 IsEmpty]: Start isEmpty. Operand 468 states and 1043 transitions. [2021-03-10 21:35:43,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:35:43,514 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:35:43,514 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:35:43,719 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-03-10 21:35:43,719 INFO L428 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:35:43,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:35:43,719 INFO L82 PathProgramCache]: Analyzing trace with hash -306061006, now seen corresponding path program 50 times [2021-03-10 21:35:43,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:35:43,720 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338149069] [2021-03-10 21:35:43,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:35:43,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:35:43,753 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:43,753 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338149069] [2021-03-10 21:35:43,754 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687936536] [2021-03-10 21:35:43,754 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 [2021-03-10 21:35:43,767 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:35:43,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:35:43,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:35:43,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:35:43,887 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:43,887 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:35:43,888 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 13 [2021-03-10 21:35:43,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145797855] [2021-03-10 21:35:43,888 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:35:43,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:35:43,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:35:43,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:35:43,888 INFO L87 Difference]: Start difference. First operand 468 states and 1043 transitions. Second operand has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 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) [2021-03-10 21:35:44,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:35:44,572 INFO L93 Difference]: Finished difference Result 1176 states and 2324 transitions. [2021-03-10 21:35:44,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-03-10 21:35:44,573 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 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 [2021-03-10 21:35:44,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:35:44,574 INFO L225 Difference]: With dead ends: 1176 [2021-03-10 21:35:44,574 INFO L226 Difference]: Without dead ends: 1176 [2021-03-10 21:35:44,575 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 657 ImplicationChecksByTransitivity, 483.5ms TimeCoverageRelationStatistics Valid=423, Invalid=1833, Unknown=0, NotChecked=0, Total=2256 [2021-03-10 21:35:44,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1176 states. [2021-03-10 21:35:44,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1176 to 469. [2021-03-10 21:35:44,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 469 states, 468 states have (on average 2.232905982905983) internal successors, (1045), 468 states have internal predecessors, (1045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:44,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 1045 transitions. [2021-03-10 21:35:44,582 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 1045 transitions. Word has length 25 [2021-03-10 21:35:44,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:35:44,582 INFO L480 AbstractCegarLoop]: Abstraction has 469 states and 1045 transitions. [2021-03-10 21:35:44,582 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 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) [2021-03-10 21:35:44,582 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 1045 transitions. [2021-03-10 21:35:44,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:35:44,583 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:35:44,583 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:35:44,795 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:35:44,795 INFO L428 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:35:44,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:35:44,795 INFO L82 PathProgramCache]: Analyzing trace with hash 396744302, now seen corresponding path program 51 times [2021-03-10 21:35:44,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:35:44,796 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687436571] [2021-03-10 21:35:44,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:35:44,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:35:44,827 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:44,827 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687436571] [2021-03-10 21:35:44,827 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1444473402] [2021-03-10 21:35:44,827 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 [2021-03-10 21:35:44,854 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-03-10 21:35:44,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:35:44,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:35:44,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:35:44,969 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:44,969 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:35:44,969 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 13 [2021-03-10 21:35:44,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172105916] [2021-03-10 21:35:44,969 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:35:44,969 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:35:44,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:35:44,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:35:44,970 INFO L87 Difference]: Start difference. First operand 469 states and 1045 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:45,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:35:45,627 INFO L93 Difference]: Finished difference Result 823 states and 1624 transitions. [2021-03-10 21:35:45,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-03-10 21:35:45,628 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:35:45,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:35:45,629 INFO L225 Difference]: With dead ends: 823 [2021-03-10 21:35:45,629 INFO L226 Difference]: Without dead ends: 817 [2021-03-10 21:35:45,629 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 431 ImplicationChecksByTransitivity, 385.7ms TimeCoverageRelationStatistics Valid=304, Invalid=1418, Unknown=0, NotChecked=0, Total=1722 [2021-03-10 21:35:45,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 817 states. [2021-03-10 21:35:45,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 817 to 469. [2021-03-10 21:35:45,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 469 states, 468 states have (on average 2.230769230769231) internal successors, (1044), 468 states have internal predecessors, (1044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:45,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 1044 transitions. [2021-03-10 21:35:45,635 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 1044 transitions. Word has length 25 [2021-03-10 21:35:45,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:35:45,635 INFO L480 AbstractCegarLoop]: Abstraction has 469 states and 1044 transitions. [2021-03-10 21:35:45,635 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:45,635 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 1044 transitions. [2021-03-10 21:35:45,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:35:45,636 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:35:45,636 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:35:45,836 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-03-10 21:35:45,836 INFO L428 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:35:45,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:35:45,837 INFO L82 PathProgramCache]: Analyzing trace with hash -868183558, now seen corresponding path program 52 times [2021-03-10 21:35:45,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:35:45,837 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282340305] [2021-03-10 21:35:45,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:35:45,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:35:45,867 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:35:45,867 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282340305] [2021-03-10 21:35:45,867 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1141289081] [2021-03-10 21:35:45,867 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 [2021-03-10 21:35:45,880 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:35:45,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:35:45,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:35:45,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:35:46,014 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:46,014 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:35:46,015 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 13 [2021-03-10 21:35:46,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809415173] [2021-03-10 21:35:46,015 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:35:46,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:35:46,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:35:46,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:35:46,015 INFO L87 Difference]: Start difference. First operand 469 states and 1044 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) [2021-03-10 21:35:47,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:35:47,044 INFO L93 Difference]: Finished difference Result 1066 states and 2098 transitions. [2021-03-10 21:35:47,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-03-10 21:35:47,045 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 [2021-03-10 21:35:47,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:35:47,046 INFO L225 Difference]: With dead ends: 1066 [2021-03-10 21:35:47,046 INFO L226 Difference]: Without dead ends: 1066 [2021-03-10 21:35:47,047 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 767 ImplicationChecksByTransitivity, 593.1ms TimeCoverageRelationStatistics Valid=554, Invalid=2308, Unknown=0, NotChecked=0, Total=2862 [2021-03-10 21:35:47,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1066 states. [2021-03-10 21:35:47,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1066 to 470. [2021-03-10 21:35:47,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 470 states, 469 states have (on average 2.230277185501066) internal successors, (1046), 469 states have internal predecessors, (1046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:47,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 470 states to 470 states and 1046 transitions. [2021-03-10 21:35:47,053 INFO L78 Accepts]: Start accepts. Automaton has 470 states and 1046 transitions. Word has length 25 [2021-03-10 21:35:47,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:35:47,053 INFO L480 AbstractCegarLoop]: Abstraction has 470 states and 1046 transitions. [2021-03-10 21:35:47,053 INFO L481 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) [2021-03-10 21:35:47,053 INFO L276 IsEmpty]: Start isEmpty. Operand 470 states and 1046 transitions. [2021-03-10 21:35:47,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:35:47,054 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:35:47,054 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:35:47,268 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-03-10 21:35:47,269 INFO L428 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:35:47,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:35:47,269 INFO L82 PathProgramCache]: Analyzing trace with hash 2042885656, now seen corresponding path program 53 times [2021-03-10 21:35:47,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:35:47,269 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475889137] [2021-03-10 21:35:47,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:35:47,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:35:47,299 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:35:47,299 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475889137] [2021-03-10 21:35:47,299 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445024590] [2021-03-10 21:35:47,300 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 [2021-03-10 21:35:47,313 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-03-10 21:35:47,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:35:47,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:35:47,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:35:47,429 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:47,429 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:35:47,429 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 13 [2021-03-10 21:35:47,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493466890] [2021-03-10 21:35:47,429 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:35:47,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:35:47,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:35:47,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:35:47,430 INFO L87 Difference]: Start difference. First operand 470 states and 1046 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) [2021-03-10 21:35:48,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:35:48,004 INFO L93 Difference]: Finished difference Result 912 states and 1823 transitions. [2021-03-10 21:35:48,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-03-10 21:35:48,005 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 [2021-03-10 21:35:48,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:35:48,006 INFO L225 Difference]: With dead ends: 912 [2021-03-10 21:35:48,006 INFO L226 Difference]: Without dead ends: 908 [2021-03-10 21:35:48,006 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 353.2ms TimeCoverageRelationStatistics Valid=246, Invalid=1160, Unknown=0, NotChecked=0, Total=1406 [2021-03-10 21:35:48,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 908 states. [2021-03-10 21:35:48,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 908 to 470. [2021-03-10 21:35:48,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 470 states, 469 states have (on average 2.228144989339019) internal successors, (1045), 469 states have internal predecessors, (1045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:48,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 470 states to 470 states and 1045 transitions. [2021-03-10 21:35:48,012 INFO L78 Accepts]: Start accepts. Automaton has 470 states and 1045 transitions. Word has length 25 [2021-03-10 21:35:48,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:35:48,012 INFO L480 AbstractCegarLoop]: Abstraction has 470 states and 1045 transitions. [2021-03-10 21:35:48,012 INFO L481 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) [2021-03-10 21:35:48,013 INFO L276 IsEmpty]: Start isEmpty. Operand 470 states and 1045 transitions. [2021-03-10 21:35:48,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:35:48,013 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:35:48,013 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:35:48,213 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-03-10 21:35:48,214 INFO L428 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:35:48,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:35:48,214 INFO L82 PathProgramCache]: Analyzing trace with hash 225908030, now seen corresponding path program 54 times [2021-03-10 21:35:48,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:35:48,214 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558644739] [2021-03-10 21:35:48,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:35:48,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:35:48,250 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:35:48,250 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558644739] [2021-03-10 21:35:48,250 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [64046217] [2021-03-10 21:35:48,251 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 [2021-03-10 21:35:48,265 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-03-10 21:35:48,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:35:48,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:35:48,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:35:48,400 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:48,400 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:35:48,400 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-03-10 21:35:48,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216405538] [2021-03-10 21:35:48,400 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:35:48,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:35:48,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:35:48,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:35:48,401 INFO L87 Difference]: Start difference. First operand 470 states and 1045 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) [2021-03-10 21:35:50,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:35:50,189 INFO L93 Difference]: Finished difference Result 1348 states and 2688 transitions. [2021-03-10 21:35:50,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-03-10 21:35:50,190 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 [2021-03-10 21:35:50,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:35:50,191 INFO L225 Difference]: With dead ends: 1348 [2021-03-10 21:35:50,191 INFO L226 Difference]: Without dead ends: 1348 [2021-03-10 21:35:50,192 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2465 ImplicationChecksByTransitivity, 1139.6ms TimeCoverageRelationStatistics Valid=1189, Invalid=5783, Unknown=0, NotChecked=0, Total=6972 [2021-03-10 21:35:50,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1348 states. [2021-03-10 21:35:50,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1348 to 472. [2021-03-10 21:35:50,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 472 states, 471 states have (on average 2.2271762208067942) internal successors, (1049), 471 states have internal predecessors, (1049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:50,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 472 states to 472 states and 1049 transitions. [2021-03-10 21:35:50,200 INFO L78 Accepts]: Start accepts. Automaton has 472 states and 1049 transitions. Word has length 25 [2021-03-10 21:35:50,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:35:50,200 INFO L480 AbstractCegarLoop]: Abstraction has 472 states and 1049 transitions. [2021-03-10 21:35:50,200 INFO L481 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) [2021-03-10 21:35:50,200 INFO L276 IsEmpty]: Start isEmpty. Operand 472 states and 1049 transitions. [2021-03-10 21:35:50,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:35:50,200 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:35:50,200 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:35:50,404 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-03-10 21:35:50,404 INFO L428 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:35:50,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:35:50,405 INFO L82 PathProgramCache]: Analyzing trace with hash 1536539390, now seen corresponding path program 55 times [2021-03-10 21:35:50,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:35:50,405 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199390438] [2021-03-10 21:35:50,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:35:50,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:35:50,442 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:35:50,442 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199390438] [2021-03-10 21:35:50,442 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2139875031] [2021-03-10 21:35:50,442 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:35:50,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:35:50,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:35:50,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:35:50,595 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:50,595 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:35:50,595 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-03-10 21:35:50,595 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358849742] [2021-03-10 21:35:50,595 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:35:50,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:35:50,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:35:50,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:35:50,596 INFO L87 Difference]: Start difference. First operand 472 states and 1049 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) [2021-03-10 21:35:51,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:35:51,279 INFO L93 Difference]: Finished difference Result 861 states and 1700 transitions. [2021-03-10 21:35:51,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-03-10 21:35:51,280 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 [2021-03-10 21:35:51,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:35:51,281 INFO L225 Difference]: With dead ends: 861 [2021-03-10 21:35:51,281 INFO L226 Difference]: Without dead ends: 841 [2021-03-10 21:35:51,281 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 529 ImplicationChecksByTransitivity, 461.5ms TimeCoverageRelationStatistics Valid=330, Invalid=1740, Unknown=0, NotChecked=0, Total=2070 [2021-03-10 21:35:51,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 841 states. [2021-03-10 21:35:51,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 841 to 472. [2021-03-10 21:35:51,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 472 states, 471 states have (on average 2.2229299363057327) internal successors, (1047), 471 states have internal predecessors, (1047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:51,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 472 states to 472 states and 1047 transitions. [2021-03-10 21:35:51,287 INFO L78 Accepts]: Start accepts. Automaton has 472 states and 1047 transitions. Word has length 25 [2021-03-10 21:35:51,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:35:51,287 INFO L480 AbstractCegarLoop]: Abstraction has 472 states and 1047 transitions. [2021-03-10 21:35:51,287 INFO L481 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) [2021-03-10 21:35:51,287 INFO L276 IsEmpty]: Start isEmpty. Operand 472 states and 1047 transitions. [2021-03-10 21:35:51,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:35:51,287 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:35:51,287 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:35:51,488 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:35:51,488 INFO L428 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:35:51,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:35:51,488 INFO L82 PathProgramCache]: Analyzing trace with hash -1504861702, now seen corresponding path program 56 times [2021-03-10 21:35:51,488 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:35:51,488 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875554596] [2021-03-10 21:35:51,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:35:51,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:35:51,536 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:51,536 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875554596] [2021-03-10 21:35:51,536 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099786415] [2021-03-10 21:35:51,536 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:35:51,561 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:35:51,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:35:51,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:35:51,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:35:51,697 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:51,697 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:35:51,697 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 21:35:51,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92602503] [2021-03-10 21:35:51,697 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:35:51,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:35:51,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:35:51,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:35:51,698 INFO L87 Difference]: Start difference. First operand 472 states and 1047 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) [2021-03-10 21:35:53,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:35:53,572 INFO L93 Difference]: Finished difference Result 984 states and 1997 transitions. [2021-03-10 21:35:53,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-03-10 21:35:53,573 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 [2021-03-10 21:35:53,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:35:53,574 INFO L225 Difference]: With dead ends: 984 [2021-03-10 21:35:53,574 INFO L226 Difference]: Without dead ends: 982 [2021-03-10 21:35:53,575 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1628 ImplicationChecksByTransitivity, 1230.9ms TimeCoverageRelationStatistics Valid=975, Invalid=4427, Unknown=0, NotChecked=0, Total=5402 [2021-03-10 21:35:53,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 982 states. [2021-03-10 21:35:53,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 982 to 436. [2021-03-10 21:35:53,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 436 states, 435 states have (on average 2.197701149425287) internal successors, (956), 435 states have internal predecessors, (956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:53,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 436 states to 436 states and 956 transitions. [2021-03-10 21:35:53,581 INFO L78 Accepts]: Start accepts. Automaton has 436 states and 956 transitions. Word has length 25 [2021-03-10 21:35:53,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:35:53,581 INFO L480 AbstractCegarLoop]: Abstraction has 436 states and 956 transitions. [2021-03-10 21:35:53,581 INFO L481 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) [2021-03-10 21:35:53,581 INFO L276 IsEmpty]: Start isEmpty. Operand 436 states and 956 transitions. [2021-03-10 21:35:53,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:35:53,581 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:35:53,582 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:35:53,782 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-03-10 21:35:53,782 INFO L428 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:35:53,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:35:53,782 INFO L82 PathProgramCache]: Analyzing trace with hash 1309318010, now seen corresponding path program 57 times [2021-03-10 21:35:53,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:35:53,782 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480922219] [2021-03-10 21:35:53,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:35:53,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:35:53,829 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:53,830 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480922219] [2021-03-10 21:35:53,830 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1711902558] [2021-03-10 21:35:53,830 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:35:53,844 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-03-10 21:35:53,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:35:53,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:35:53,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:35:53,976 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:53,976 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:35:53,977 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 21:35:53,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458209360] [2021-03-10 21:35:53,977 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:35:53,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:35:53,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:35:53,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:35:53,977 INFO L87 Difference]: Start difference. First operand 436 states and 956 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) [2021-03-10 21:35:54,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:35:54,526 INFO L93 Difference]: Finished difference Result 695 states and 1377 transitions. [2021-03-10 21:35:54,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-03-10 21:35:54,527 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 [2021-03-10 21:35:54,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:35:54,528 INFO L225 Difference]: With dead ends: 695 [2021-03-10 21:35:54,528 INFO L226 Difference]: Without dead ends: 685 [2021-03-10 21:35:54,528 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 438.0ms TimeCoverageRelationStatistics Valid=281, Invalid=1441, Unknown=0, NotChecked=0, Total=1722 [2021-03-10 21:35:54,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 685 states. [2021-03-10 21:35:54,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 685 to 436. [2021-03-10 21:35:54,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 436 states, 435 states have (on average 2.193103448275862) internal successors, (954), 435 states have internal predecessors, (954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:54,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 436 states to 436 states and 954 transitions. [2021-03-10 21:35:54,533 INFO L78 Accepts]: Start accepts. Automaton has 436 states and 954 transitions. Word has length 25 [2021-03-10 21:35:54,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:35:54,533 INFO L480 AbstractCegarLoop]: Abstraction has 436 states and 954 transitions. [2021-03-10 21:35:54,533 INFO L481 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) [2021-03-10 21:35:54,533 INFO L276 IsEmpty]: Start isEmpty. Operand 436 states and 954 transitions. [2021-03-10 21:35:54,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:35:54,534 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:35:54,534 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:35:54,734 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:35:54,734 INFO L428 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:35:54,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:35:54,735 INFO L82 PathProgramCache]: Analyzing trace with hash -1091186638, now seen corresponding path program 58 times [2021-03-10 21:35:54,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:35:54,735 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178888605] [2021-03-10 21:35:54,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:35:54,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:35:54,780 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:54,780 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178888605] [2021-03-10 21:35:54,780 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992732018] [2021-03-10 21:35:54,780 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:35:54,793 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:35:54,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:35:54,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:35:54,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:35:54,929 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:54,929 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:35:54,929 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 21:35:54,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209220855] [2021-03-10 21:35:54,930 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:35:54,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:35:54,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:35:54,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:35:54,930 INFO L87 Difference]: Start difference. First operand 436 states and 954 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:56,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:35:56,656 INFO L93 Difference]: Finished difference Result 1039 states and 2080 transitions. [2021-03-10 21:35:56,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-03-10 21:35:56,656 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:35:56,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:35:56,658 INFO L225 Difference]: With dead ends: 1039 [2021-03-10 21:35:56,658 INFO L226 Difference]: Without dead ends: 1039 [2021-03-10 21:35:56,658 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1614 ImplicationChecksByTransitivity, 1203.0ms TimeCoverageRelationStatistics Valid=950, Invalid=4306, Unknown=0, NotChecked=0, Total=5256 [2021-03-10 21:35:56,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1039 states. [2021-03-10 21:35:56,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1039 to 402. [2021-03-10 21:35:56,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 401 states have (on average 2.1596009975062342) internal successors, (866), 401 states have internal predecessors, (866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:56,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 866 transitions. [2021-03-10 21:35:56,664 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 866 transitions. Word has length 25 [2021-03-10 21:35:56,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:35:56,664 INFO L480 AbstractCegarLoop]: Abstraction has 402 states and 866 transitions. [2021-03-10 21:35:56,664 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:56,664 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 866 transitions. [2021-03-10 21:35:56,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:35:56,665 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:35:56,665 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:35:56,865 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2021-03-10 21:35:56,865 INFO L428 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:35:56,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:35:56,865 INFO L82 PathProgramCache]: Analyzing trace with hash -1088108690, now seen corresponding path program 59 times [2021-03-10 21:35:56,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:35:56,865 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550992538] [2021-03-10 21:35:56,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:35:56,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:35:56,911 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:56,912 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550992538] [2021-03-10 21:35:56,912 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1471882417] [2021-03-10 21:35:56,912 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:35:56,926 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 21:35:56,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:35:56,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:35:56,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:35:57,083 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:57,084 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:35:57,084 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 21:35:57,084 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855986258] [2021-03-10 21:35:57,084 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:35:57,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:35:57,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:35:57,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:35:57,085 INFO L87 Difference]: Start difference. First operand 402 states and 866 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:57,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:35:57,708 INFO L93 Difference]: Finished difference Result 548 states and 1068 transitions. [2021-03-10 21:35:57,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-03-10 21:35:57,709 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:35:57,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:35:57,710 INFO L225 Difference]: With dead ends: 548 [2021-03-10 21:35:57,710 INFO L226 Difference]: Without dead ends: 518 [2021-03-10 21:35:57,710 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 450 ImplicationChecksByTransitivity, 479.8ms TimeCoverageRelationStatistics Valid=310, Invalid=1582, Unknown=0, NotChecked=0, Total=1892 [2021-03-10 21:35:57,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518 states. [2021-03-10 21:35:57,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518 to 381. [2021-03-10 21:35:57,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 381 states, 380 states have (on average 2.168421052631579) internal successors, (824), 380 states have internal predecessors, (824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:57,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 381 states to 381 states and 824 transitions. [2021-03-10 21:35:57,714 INFO L78 Accepts]: Start accepts. Automaton has 381 states and 824 transitions. Word has length 25 [2021-03-10 21:35:57,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:35:57,715 INFO L480 AbstractCegarLoop]: Abstraction has 381 states and 824 transitions. [2021-03-10 21:35:57,715 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:57,715 INFO L276 IsEmpty]: Start isEmpty. Operand 381 states and 824 transitions. [2021-03-10 21:35:57,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:35:57,715 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:35:57,715 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:35:57,929 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:35:57,930 INFO L428 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:35:57,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:35:57,930 INFO L82 PathProgramCache]: Analyzing trace with hash -1258665422, now seen corresponding path program 60 times [2021-03-10 21:35:57,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:35:57,930 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779615843] [2021-03-10 21:35:57,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:35:57,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:35:57,972 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:57,972 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779615843] [2021-03-10 21:35:57,972 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1442774072] [2021-03-10 21:35:57,972 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:35:57,988 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 21:35:57,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:35:57,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:35:57,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:35:58,115 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:58,115 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:35:58,115 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-03-10 21:35:58,115 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073012334] [2021-03-10 21:35:58,115 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:35:58,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:35:58,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:35:58,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:35:58,116 INFO L87 Difference]: Start difference. First operand 381 states and 824 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 13 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:58,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:35:58,998 INFO L93 Difference]: Finished difference Result 749 states and 1476 transitions. [2021-03-10 21:35:58,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-03-10 21:35:58,999 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 13 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:35:58,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:35:59,000 INFO L225 Difference]: With dead ends: 749 [2021-03-10 21:35:59,000 INFO L226 Difference]: Without dead ends: 749 [2021-03-10 21:35:59,000 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 981 ImplicationChecksByTransitivity, 646.3ms TimeCoverageRelationStatistics Valid=498, Invalid=2582, Unknown=0, NotChecked=0, Total=3080 [2021-03-10 21:35:59,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 749 states. [2021-03-10 21:35:59,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 749 to 375. [2021-03-10 21:35:59,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 375 states, 374 states have (on average 2.1550802139037435) internal successors, (806), 374 states have internal predecessors, (806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:59,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 375 states to 375 states and 806 transitions. [2021-03-10 21:35:59,004 INFO L78 Accepts]: Start accepts. Automaton has 375 states and 806 transitions. Word has length 25 [2021-03-10 21:35:59,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:35:59,005 INFO L480 AbstractCegarLoop]: Abstraction has 375 states and 806 transitions. [2021-03-10 21:35:59,005 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 13 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:59,005 INFO L276 IsEmpty]: Start isEmpty. Operand 375 states and 806 transitions. [2021-03-10 21:35:59,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:35:59,005 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:35:59,005 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:35:59,212 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2021-03-10 21:35:59,212 INFO L428 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:35:59,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:35:59,212 INFO L82 PathProgramCache]: Analyzing trace with hash -172629906, now seen corresponding path program 61 times [2021-03-10 21:35:59,212 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:35:59,212 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045020926] [2021-03-10 21:35:59,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:35:59,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:35:59,256 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:59,256 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045020926] [2021-03-10 21:35:59,256 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [833688397] [2021-03-10 21:35:59,256 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 21:35:59,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:35:59,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:35:59,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:35:59,385 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:59,385 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:35:59,385 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-03-10 21:35:59,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595543874] [2021-03-10 21:35:59,386 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:35:59,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:35:59,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:35:59,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:35:59,387 INFO L87 Difference]: Start difference. First operand 375 states and 806 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:00,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:36:00,070 INFO L93 Difference]: Finished difference Result 567 states and 1087 transitions. [2021-03-10 21:36:00,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-03-10 21:36:00,070 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:36:00,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:36:00,071 INFO L225 Difference]: With dead ends: 567 [2021-03-10 21:36:00,071 INFO L226 Difference]: Without dead ends: 558 [2021-03-10 21:36:00,071 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 564 ImplicationChecksByTransitivity, 442.8ms TimeCoverageRelationStatistics Valid=316, Invalid=1754, Unknown=0, NotChecked=0, Total=2070 [2021-03-10 21:36:00,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 558 states. [2021-03-10 21:36:00,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 558 to 360. [2021-03-10 21:36:00,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 360 states, 359 states have (on average 2.161559888579387) internal successors, (776), 359 states have internal predecessors, (776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:00,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 776 transitions. [2021-03-10 21:36:00,075 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 776 transitions. Word has length 25 [2021-03-10 21:36:00,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:36:00,075 INFO L480 AbstractCegarLoop]: Abstraction has 360 states and 776 transitions. [2021-03-10 21:36:00,075 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:00,075 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 776 transitions. [2021-03-10 21:36:00,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:36:00,076 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:36:00,076 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:36:00,285 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:36:00,285 INFO L428 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:36:00,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:36:00,285 INFO L82 PathProgramCache]: Analyzing trace with hash 1976910898, now seen corresponding path program 62 times [2021-03-10 21:36:00,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:36:00,285 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943131088] [2021-03-10 21:36:00,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:36:00,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:36:00,323 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:36:00,323 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943131088] [2021-03-10 21:36:00,323 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [132711209] [2021-03-10 21:36:00,323 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 [2021-03-10 21:36:00,339 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:36:00,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:36:00,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:36:00,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:36:00,441 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:36:00,441 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:36:00,441 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 11 [2021-03-10 21:36:00,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148107232] [2021-03-10 21:36:00,441 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:36:00,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:36:00,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:36:00,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:36:00,442 INFO L87 Difference]: Start difference. First operand 360 states and 776 transitions. Second operand has 12 states, 12 states have (on average 3.5) internal successors, (42), 11 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) [2021-03-10 21:36:00,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:36:00,992 INFO L93 Difference]: Finished difference Result 680 states and 1310 transitions. [2021-03-10 21:36:00,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-03-10 21:36:00,993 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 11 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 [2021-03-10 21:36:00,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:36:00,994 INFO L225 Difference]: With dead ends: 680 [2021-03-10 21:36:00,994 INFO L226 Difference]: Without dead ends: 680 [2021-03-10 21:36:00,995 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 560 ImplicationChecksByTransitivity, 426.4ms TimeCoverageRelationStatistics Valid=340, Invalid=1552, Unknown=0, NotChecked=0, Total=1892 [2021-03-10 21:36:00,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 680 states. [2021-03-10 21:36:00,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 680 to 360. [2021-03-10 21:36:00,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 360 states, 359 states have (on average 2.1587743732590527) internal successors, (775), 359 states have internal predecessors, (775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:00,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 775 transitions. [2021-03-10 21:36:00,999 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 775 transitions. Word has length 25 [2021-03-10 21:36:00,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:36:00,999 INFO L480 AbstractCegarLoop]: Abstraction has 360 states and 775 transitions. [2021-03-10 21:36:00,999 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 11 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) [2021-03-10 21:36:00,999 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 775 transitions. [2021-03-10 21:36:00,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:36:00,999 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:36:00,999 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:36:01,206 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-03-10 21:36:01,206 INFO L428 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:36:01,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:36:01,206 INFO L82 PathProgramCache]: Analyzing trace with hash -1615251090, now seen corresponding path program 63 times [2021-03-10 21:36:01,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:36:01,206 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992038988] [2021-03-10 21:36:01,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:36:01,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:36:01,242 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:36:01,242 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992038988] [2021-03-10 21:36:01,242 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1347968452] [2021-03-10 21:36:01,242 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 [2021-03-10 21:36:01,256 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 21:36:01,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:36:01,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:36:01,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:36:01,365 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:36:01,365 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:36:01,366 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 11 [2021-03-10 21:36:01,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970365903] [2021-03-10 21:36:01,366 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:36:01,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:36:01,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:36:01,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:36:01,366 INFO L87 Difference]: Start difference. First operand 360 states and 775 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) [2021-03-10 21:36:01,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:36:01,678 INFO L93 Difference]: Finished difference Result 441 states and 888 transitions. [2021-03-10 21:36:01,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-10 21:36:01,678 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 [2021-03-10 21:36:01,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:36:01,679 INFO L225 Difference]: With dead ends: 441 [2021-03-10 21:36:01,683 INFO L226 Difference]: Without dead ends: 438 [2021-03-10 21:36:01,683 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 211.0ms TimeCoverageRelationStatistics Valid=125, Invalid=427, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:36:01,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2021-03-10 21:36:01,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 357. [2021-03-10 21:36:01,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 357 states, 356 states have (on average 2.1601123595505616) internal successors, (769), 356 states have internal predecessors, (769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:01,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 769 transitions. [2021-03-10 21:36:01,687 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 769 transitions. Word has length 25 [2021-03-10 21:36:01,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:36:01,687 INFO L480 AbstractCegarLoop]: Abstraction has 357 states and 769 transitions. [2021-03-10 21:36:01,687 INFO L481 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) [2021-03-10 21:36:01,687 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 769 transitions. [2021-03-10 21:36:01,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:36:01,687 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:36:01,687 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:36:01,888 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:36:01,888 INFO L428 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:36:01,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:36:01,888 INFO L82 PathProgramCache]: Analyzing trace with hash 1414788346, now seen corresponding path program 64 times [2021-03-10 21:36:01,888 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:36:01,888 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781681158] [2021-03-10 21:36:01,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:36:01,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:36:01,925 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:36:01,925 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781681158] [2021-03-10 21:36:01,925 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [250639141] [2021-03-10 21:36:01,925 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 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 [2021-03-10 21:36:01,939 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:36:01,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:36:01,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:36:01,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:36:02,049 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:36:02,049 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:36:02,049 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 11 [2021-03-10 21:36:02,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624200882] [2021-03-10 21:36:02,049 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:36:02,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:36:02,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:36:02,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:36:02,050 INFO L87 Difference]: Start difference. First operand 357 states and 769 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 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) [2021-03-10 21:36:02,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:36:02,680 INFO L93 Difference]: Finished difference Result 498 states and 1005 transitions. [2021-03-10 21:36:02,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-03-10 21:36:02,680 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 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 [2021-03-10 21:36:02,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:36:02,681 INFO L225 Difference]: With dead ends: 498 [2021-03-10 21:36:02,681 INFO L226 Difference]: Without dead ends: 498 [2021-03-10 21:36:02,681 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 400.8ms TimeCoverageRelationStatistics Valid=297, Invalid=1035, Unknown=0, NotChecked=0, Total=1332 [2021-03-10 21:36:02,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2021-03-10 21:36:02,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 358. [2021-03-10 21:36:02,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 358 states, 357 states have (on average 2.1596638655462184) internal successors, (771), 357 states have internal predecessors, (771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:02,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 771 transitions. [2021-03-10 21:36:02,685 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 771 transitions. Word has length 25 [2021-03-10 21:36:02,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:36:02,685 INFO L480 AbstractCegarLoop]: Abstraction has 358 states and 771 transitions. [2021-03-10 21:36:02,685 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 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) [2021-03-10 21:36:02,685 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 771 transitions. [2021-03-10 21:36:02,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:36:02,685 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:36:02,685 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:36:02,899 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-03-10 21:36:02,900 INFO L428 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:36:02,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:36:02,901 INFO L82 PathProgramCache]: Analyzing trace with hash 30890264, now seen corresponding path program 65 times [2021-03-10 21:36:02,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:36:02,901 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762772531] [2021-03-10 21:36:02,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:36:02,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:36:02,934 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:36:02,934 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762772531] [2021-03-10 21:36:02,934 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [922447473] [2021-03-10 21:36:02,934 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 [2021-03-10 21:36:02,947 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 21:36:02,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:36:02,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:36:02,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:36:03,051 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:36:03,051 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:36:03,051 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 11 [2021-03-10 21:36:03,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596774810] [2021-03-10 21:36:03,052 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:36:03,052 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:36:03,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:36:03,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:36:03,052 INFO L87 Difference]: Start difference. First operand 358 states and 771 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 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) [2021-03-10 21:36:03,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:36:03,563 INFO L93 Difference]: Finished difference Result 633 states and 1215 transitions. [2021-03-10 21:36:03,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-03-10 21:36:03,564 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 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 [2021-03-10 21:36:03,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:36:03,565 INFO L225 Difference]: With dead ends: 633 [2021-03-10 21:36:03,565 INFO L226 Difference]: Without dead ends: 631 [2021-03-10 21:36:03,565 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 403 ImplicationChecksByTransitivity, 389.6ms TimeCoverageRelationStatistics Valid=268, Invalid=1292, Unknown=0, NotChecked=0, Total=1560 [2021-03-10 21:36:03,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 631 states. [2021-03-10 21:36:03,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 631 to 358. [2021-03-10 21:36:03,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 358 states, 357 states have (on average 2.156862745098039) internal successors, (770), 357 states have internal predecessors, (770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:03,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 770 transitions. [2021-03-10 21:36:03,569 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 770 transitions. Word has length 25 [2021-03-10 21:36:03,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:36:03,569 INFO L480 AbstractCegarLoop]: Abstraction has 358 states and 770 transitions. [2021-03-10 21:36:03,569 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 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) [2021-03-10 21:36:03,569 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 770 transitions. [2021-03-10 21:36:03,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:36:03,569 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:36:03,570 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:36:03,783 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-03-10 21:36:03,784 INFO L428 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:36:03,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:36:03,784 INFO L82 PathProgramCache]: Analyzing trace with hash -1786087362, now seen corresponding path program 66 times [2021-03-10 21:36:03,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:36:03,784 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117033794] [2021-03-10 21:36:03,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:36:03,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:36:03,822 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:36:03,822 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117033794] [2021-03-10 21:36:03,822 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [9595835] [2021-03-10 21:36:03,822 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 [2021-03-10 21:36:03,837 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 21:36:03,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:36:03,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:36:03,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:36:03,965 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:36:03,965 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:36:03,965 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 12 [2021-03-10 21:36:03,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525341488] [2021-03-10 21:36:03,965 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:36:03,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:36:03,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:36:03,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:36:03,966 INFO L87 Difference]: Start difference. First operand 358 states and 770 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) [2021-03-10 21:36:05,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:36:05,534 INFO L93 Difference]: Finished difference Result 741 states and 1512 transitions. [2021-03-10 21:36:05,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-03-10 21:36:05,534 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 [2021-03-10 21:36:05,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:36:05,535 INFO L225 Difference]: With dead ends: 741 [2021-03-10 21:36:05,535 INFO L226 Difference]: Without dead ends: 741 [2021-03-10 21:36:05,536 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2066 ImplicationChecksByTransitivity, 1107.4ms TimeCoverageRelationStatistics Valid=1079, Invalid=5241, Unknown=0, NotChecked=0, Total=6320 [2021-03-10 21:36:05,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 741 states. [2021-03-10 21:36:05,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 741 to 362. [2021-03-10 21:36:05,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 362 states, 361 states have (on average 2.155124653739612) internal successors, (778), 361 states have internal predecessors, (778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:05,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 778 transitions. [2021-03-10 21:36:05,540 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 778 transitions. Word has length 25 [2021-03-10 21:36:05,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:36:05,540 INFO L480 AbstractCegarLoop]: Abstraction has 362 states and 778 transitions. [2021-03-10 21:36:05,540 INFO L481 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) [2021-03-10 21:36:05,540 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 778 transitions. [2021-03-10 21:36:05,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:36:05,540 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:36:05,541 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:36:05,755 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-03-10 21:36:05,755 INFO L428 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:36:05,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:36:05,755 INFO L82 PathProgramCache]: Analyzing trace with hash -475456002, now seen corresponding path program 67 times [2021-03-10 21:36:05,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:36:05,755 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897820949] [2021-03-10 21:36:05,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:36:05,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:36:05,790 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:36:05,790 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897820949] [2021-03-10 21:36:05,790 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617707534] [2021-03-10 21:36:05,791 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 [2021-03-10 21:36:05,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:36:05,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:36:05,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:36:05,923 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:36:05,924 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:36:05,924 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 12 [2021-03-10 21:36:05,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923717858] [2021-03-10 21:36:05,924 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:36:05,924 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:36:05,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:36:05,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:36:05,924 INFO L87 Difference]: Start difference. First operand 362 states and 778 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) [2021-03-10 21:36:06,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:36:06,710 INFO L93 Difference]: Finished difference Result 727 states and 1360 transitions. [2021-03-10 21:36:06,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-03-10 21:36:06,711 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 [2021-03-10 21:36:06,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:36:06,712 INFO L225 Difference]: With dead ends: 727 [2021-03-10 21:36:06,712 INFO L226 Difference]: Without dead ends: 707 [2021-03-10 21:36:06,712 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 723 ImplicationChecksByTransitivity, 608.8ms TimeCoverageRelationStatistics Valid=429, Invalid=2223, Unknown=0, NotChecked=0, Total=2652 [2021-03-10 21:36:06,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 707 states. [2021-03-10 21:36:06,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 707 to 362. [2021-03-10 21:36:06,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 362 states, 361 states have (on average 2.14404432132964) internal successors, (774), 361 states have internal predecessors, (774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:06,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 774 transitions. [2021-03-10 21:36:06,716 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 774 transitions. Word has length 25 [2021-03-10 21:36:06,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:36:06,717 INFO L480 AbstractCegarLoop]: Abstraction has 362 states and 774 transitions. [2021-03-10 21:36:06,717 INFO L481 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) [2021-03-10 21:36:06,717 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 774 transitions. [2021-03-10 21:36:06,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:36:06,717 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:36:06,717 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:36:06,923 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:36:06,923 INFO L428 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:36:06,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:36:06,923 INFO L82 PathProgramCache]: Analyzing trace with hash 778110202, now seen corresponding path program 68 times [2021-03-10 21:36:06,923 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:36:06,923 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119293339] [2021-03-10 21:36:06,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:36:06,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:36:06,973 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:36:06,973 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119293339] [2021-03-10 21:36:06,973 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [174650515] [2021-03-10 21:36:06,973 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 [2021-03-10 21:36:06,993 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:36:06,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:36:06,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:36:06,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:36:07,112 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:36:07,112 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:36:07,112 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-03-10 21:36:07,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488302476] [2021-03-10 21:36:07,112 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:36:07,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:36:07,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:36:07,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:36:07,113 INFO L87 Difference]: Start difference. First operand 362 states and 774 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) [2021-03-10 21:36:09,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:36:09,620 INFO L93 Difference]: Finished difference Result 856 states and 1795 transitions. [2021-03-10 21:36:09,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2021-03-10 21:36:09,621 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 [2021-03-10 21:36:09,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:36:09,622 INFO L225 Difference]: With dead ends: 856 [2021-03-10 21:36:09,622 INFO L226 Difference]: Without dead ends: 852 [2021-03-10 21:36:09,623 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3402 ImplicationChecksByTransitivity, 1838.4ms TimeCoverageRelationStatistics Valid=1807, Invalid=7895, Unknown=0, NotChecked=0, Total=9702 [2021-03-10 21:36:09,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 852 states. [2021-03-10 21:36:09,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 852 to 366. [2021-03-10 21:36:09,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 366 states, 365 states have (on average 2.1424657534246574) internal successors, (782), 365 states have internal predecessors, (782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:09,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 782 transitions. [2021-03-10 21:36:09,628 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 782 transitions. Word has length 25 [2021-03-10 21:36:09,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:36:09,628 INFO L480 AbstractCegarLoop]: Abstraction has 366 states and 782 transitions. [2021-03-10 21:36:09,628 INFO L481 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) [2021-03-10 21:36:09,628 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 782 transitions. [2021-03-10 21:36:09,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:36:09,628 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:36:09,628 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:36:09,843 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:36:09,843 INFO L428 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:36:09,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:36:09,843 INFO L82 PathProgramCache]: Analyzing trace with hash -702677382, now seen corresponding path program 69 times [2021-03-10 21:36:09,843 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:36:09,843 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122424711] [2021-03-10 21:36:09,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:36:09,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:36:09,889 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:36:09,889 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122424711] [2021-03-10 21:36:09,889 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1732735644] [2021-03-10 21:36:09,889 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 [2021-03-10 21:36:09,903 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-10 21:36:09,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:36:09,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:36:09,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:36:10,023 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:36:10,023 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:36:10,023 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-03-10 21:36:10,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918814395] [2021-03-10 21:36:10,024 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:36:10,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:36:10,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:36:10,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:36:10,024 INFO L87 Difference]: Start difference. First operand 366 states and 782 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) [2021-03-10 21:36:10,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:36:10,941 INFO L93 Difference]: Finished difference Result 718 states and 1344 transitions. [2021-03-10 21:36:10,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-03-10 21:36:10,941 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 [2021-03-10 21:36:10,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:36:10,943 INFO L225 Difference]: With dead ends: 718 [2021-03-10 21:36:10,943 INFO L226 Difference]: Without dead ends: 688 [2021-03-10 21:36:10,943 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 923 ImplicationChecksByTransitivity, 753.4ms TimeCoverageRelationStatistics Valid=555, Invalid=2751, Unknown=0, NotChecked=0, Total=3306 [2021-03-10 21:36:10,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 688 states. [2021-03-10 21:36:10,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 688 to 368. [2021-03-10 21:36:10,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 368 states, 367 states have (on average 2.128065395095368) internal successors, (781), 367 states have internal predecessors, (781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:10,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 781 transitions. [2021-03-10 21:36:10,947 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 781 transitions. Word has length 25 [2021-03-10 21:36:10,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:36:10,947 INFO L480 AbstractCegarLoop]: Abstraction has 368 states and 781 transitions. [2021-03-10 21:36:10,947 INFO L481 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) [2021-03-10 21:36:10,947 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 781 transitions. [2021-03-10 21:36:10,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:36:10,948 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:36:10,948 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:36:11,162 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:36:11,162 INFO L428 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:36:11,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:36:11,163 INFO L82 PathProgramCache]: Analyzing trace with hash -339258698, now seen corresponding path program 70 times [2021-03-10 21:36:11,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:36:11,163 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631346450] [2021-03-10 21:36:11,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:36:11,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:36:11,222 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:36:11,222 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631346450] [2021-03-10 21:36:11,222 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1463133633] [2021-03-10 21:36:11,222 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 [2021-03-10 21:36:11,235 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:36:11,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:36:11,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:36:11,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:36:11,360 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:36:11,360 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:36:11,360 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 21:36:11,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749084365] [2021-03-10 21:36:11,361 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:36:11,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:36:11,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:36:11,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:36:11,361 INFO L87 Difference]: Start difference. First operand 368 states and 781 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) [2021-03-10 21:36:13,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:36:13,274 INFO L93 Difference]: Finished difference Result 714 states and 1495 transitions. [2021-03-10 21:36:13,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-03-10 21:36:13,275 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 [2021-03-10 21:36:13,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:36:13,276 INFO L225 Difference]: With dead ends: 714 [2021-03-10 21:36:13,276 INFO L226 Difference]: Without dead ends: 704 [2021-03-10 21:36:13,276 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1355 ImplicationChecksByTransitivity, 1402.1ms TimeCoverageRelationStatistics Valid=1023, Invalid=4233, Unknown=0, NotChecked=0, Total=5256 [2021-03-10 21:36:13,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 704 states. [2021-03-10 21:36:13,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 704 to 355. [2021-03-10 21:36:13,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 354 states have (on average 2.132768361581921) internal successors, (755), 354 states have internal predecessors, (755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:13,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 755 transitions. [2021-03-10 21:36:13,280 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 755 transitions. Word has length 25 [2021-03-10 21:36:13,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:36:13,280 INFO L480 AbstractCegarLoop]: Abstraction has 355 states and 755 transitions. [2021-03-10 21:36:13,280 INFO L481 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) [2021-03-10 21:36:13,280 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 755 transitions. [2021-03-10 21:36:13,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:36:13,281 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:36:13,281 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:36:13,483 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable73 [2021-03-10 21:36:13,483 INFO L428 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:36:13,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:36:13,483 INFO L82 PathProgramCache]: Analyzing trace with hash -19091466, now seen corresponding path program 71 times [2021-03-10 21:36:13,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:36:13,483 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121627232] [2021-03-10 21:36:13,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:36:13,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:36:13,550 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:36:13,550 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121627232] [2021-03-10 21:36:13,550 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2139208128] [2021-03-10 21:36:13,550 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 [2021-03-10 21:36:13,565 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 21:36:13,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:36:13,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:36:13,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:36:13,698 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:36:13,698 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:36:13,698 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 21:36:13,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499949976] [2021-03-10 21:36:13,699 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:36:13,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:36:13,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:36:13,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:36:13,699 INFO L87 Difference]: Start difference. First operand 355 states and 755 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) [2021-03-10 21:36:14,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:36:14,345 INFO L93 Difference]: Finished difference Result 532 states and 1030 transitions. [2021-03-10 21:36:14,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-03-10 21:36:14,346 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 [2021-03-10 21:36:14,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:36:14,346 INFO L225 Difference]: With dead ends: 532 [2021-03-10 21:36:14,347 INFO L226 Difference]: Without dead ends: 518 [2021-03-10 21:36:14,347 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 417 ImplicationChecksByTransitivity, 545.2ms TimeCoverageRelationStatistics Valid=311, Invalid=1495, Unknown=0, NotChecked=0, Total=1806 [2021-03-10 21:36:14,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518 states. [2021-03-10 21:36:14,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518 to 355. [2021-03-10 21:36:14,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 354 states have (on average 2.121468926553672) internal successors, (751), 354 states have internal predecessors, (751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:14,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 751 transitions. [2021-03-10 21:36:14,350 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 751 transitions. Word has length 25 [2021-03-10 21:36:14,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:36:14,350 INFO L480 AbstractCegarLoop]: Abstraction has 355 states and 751 transitions. [2021-03-10 21:36:14,350 INFO L481 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) [2021-03-10 21:36:14,350 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 751 transitions. [2021-03-10 21:36:14,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-03-10 21:36:14,351 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:36:14,351 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:36:14,551 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:36:14,551 INFO L428 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:36:14,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:36:14,552 INFO L82 PathProgramCache]: Analyzing trace with hash -1769779472, now seen corresponding path program 72 times [2021-03-10 21:36:14,552 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:36:14,552 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978279264] [2021-03-10 21:36:14,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:36:14,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:36:14,602 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:36:14,603 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978279264] [2021-03-10 21:36:14,603 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739756566] [2021-03-10 21:36:14,603 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 [2021-03-10 21:36:14,616 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 21:36:14,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:36:14,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 19 conjunts are in the unsatisfiable core [2021-03-10 21:36:14,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown