/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/figure1.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-9e34d99ae2c6837f487980c721c4b6acf9d9b15c-9e34d99 [2021-07-09 17:57:01,860 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-07-09 17:57:01,861 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-07-09 17:57:01,892 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-07-09 17:57:01,939 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 [2021-07-09 17:57:01,967 INFO L113 SettingsManager]: Loading preferences was successful [2021-07-09 17:57:01,967 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-07-09 17:57:01,968 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-07-09 17:57:01,968 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-07-09 17:57:01,970 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-07-09 17:57:01,970 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-07-09 17:57:01,970 INFO L138 SettingsManager]: * Use SBE=true [2021-07-09 17:57:01,970 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-07-09 17:57:01,970 INFO L138 SettingsManager]: * sizeof long=4 [2021-07-09 17:57:01,970 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-07-09 17:57:01,971 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-07-09 17:57:01,971 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-07-09 17:57:01,971 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-07-09 17:57:01,971 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-07-09 17:57:01,971 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-07-09 17:57:01,971 INFO L138 SettingsManager]: * sizeof long double=12 [2021-07-09 17:57:01,972 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-07-09 17:57:01,972 INFO L138 SettingsManager]: * Use constant arrays=true [2021-07-09 17:57:01,972 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-07-09 17:57:01,972 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-07-09 17:57:01,972 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-07-09 17:57:01,972 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-07-09 17:57:01,972 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-07-09 17:57:01,972 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-09 17:57:01,972 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-07-09 17:57:01,972 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-07-09 17:57:01,973 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-07-09 17:57:01,973 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-07-09 17:57:01,973 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-07-09 17:57:01,973 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-07-09 17:57:01,973 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-07-09 17:57:01,973 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-07-09 17:57:02,216 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-07-09 17:57:02,231 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-07-09 17:57:02,233 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-07-09 17:57:02,234 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-07-09 17:57:02,234 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-07-09 17:57:02,235 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/figure1.wvr.bpl [2021-07-09 17:57:02,235 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/figure1.wvr.bpl' [2021-07-09 17:57:02,266 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-07-09 17:57:02,267 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-07-09 17:57:02,268 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-07-09 17:57:02,268 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-07-09 17:57:02,268 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-07-09 17:57:02,276 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "figure1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:57:02" (1/1) ... [2021-07-09 17:57:02,282 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "figure1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:57:02" (1/1) ... [2021-07-09 17:57:02,287 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-07-09 17:57:02,288 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-07-09 17:57:02,289 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-07-09 17:57:02,289 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-07-09 17:57:02,294 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "figure1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:57:02" (1/1) ... [2021-07-09 17:57:02,294 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "figure1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:57:02" (1/1) ... [2021-07-09 17:57:02,295 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "figure1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:57:02" (1/1) ... [2021-07-09 17:57:02,295 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "figure1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:57:02" (1/1) ... [2021-07-09 17:57:02,297 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "figure1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:57:02" (1/1) ... [2021-07-09 17:57:02,299 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "figure1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:57:02" (1/1) ... [2021-07-09 17:57:02,300 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "figure1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:57:02" (1/1) ... [2021-07-09 17:57:02,300 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-07-09 17:57:02,302 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-07-09 17:57:02,302 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-07-09 17:57:02,302 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-07-09 17:57:02,304 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "figure1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:57:02" (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 [2021-07-09 17:57:02,365 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-07-09 17:57:02,366 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-07-09 17:57:02,366 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-07-09 17:57:02,366 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-07-09 17:57:02,366 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-07-09 17:57:02,366 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-07-09 17:57:02,366 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-07-09 17:57:02,366 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-07-09 17:57:02,366 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-07-09 17:57:02,367 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-07-09 17:57:02,555 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-07-09 17:57:02,555 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-07-09 17:57:02,557 INFO L202 PluginConnector]: Adding new model figure1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.07 05:57:02 BoogieIcfgContainer [2021-07-09 17:57:02,557 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-07-09 17:57:02,558 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-07-09 17:57:02,558 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-07-09 17:57:02,560 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-07-09 17:57:02,560 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "figure1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:57:02" (1/2) ... [2021-07-09 17:57:02,561 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f13cd8 and model type figure1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.07 05:57:02, skipping insertion in model container [2021-07-09 17:57:02,561 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "figure1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.07 05:57:02" (2/2) ... [2021-07-09 17:57:02,562 INFO L111 eAbstractionObserver]: Analyzing ICFG figure1.wvr.bpl [2021-07-09 17:57:02,565 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-07-09 17:57:02,565 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-07-09 17:57:02,566 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-07-09 17:57:02,566 INFO L474 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-07-09 17:57:02,602 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-07-09 17:57:02,616 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-07-09 17:57:02,646 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-07-09 17:57:02,646 INFO L379 AbstractCegarLoop]: Hoare is false [2021-07-09 17:57:02,646 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-07-09 17:57:02,646 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-07-09 17:57:02,646 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-07-09 17:57:02,646 INFO L383 AbstractCegarLoop]: Difference is false [2021-07-09 17:57:02,646 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-07-09 17:57:02,646 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-07-09 17:57:02,652 INFO L110 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 27 places, 22 transitions, 60 flow [2021-07-09 17:57:02,678 INFO L132 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 32 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 31 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:02,679 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 31 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:02,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-07-09 17:57:02,683 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:57:02,684 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:57:02,684 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:57:02,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:57:02,688 INFO L82 PathProgramCache]: Analyzing trace with hash -155133599, now seen corresponding path program 1 times [2021-07-09 17:57:02,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:57:02,693 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063063197] [2021-07-09 17:57:02,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:57:02,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:57:02,806 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:57:02,806 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:57:02,807 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063063197] [2021-07-09 17:57:02,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063063197] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 17:57:02,808 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 17:57:02,808 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-09 17:57:02,808 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589206770] [2021-07-09 17:57:02,811 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-09 17:57:02,812 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:57:02,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-09 17:57:02,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-09 17:57:02,825 INFO L87 Difference]: Start difference. First operand has 32 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 31 states have internal predecessors, (56), 0 states have call successors, (0), 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 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:02,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:57:02,851 INFO L93 Difference]: Finished difference Result 57 states and 100 transitions. [2021-07-09 17:57:02,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-09 17:57:02,854 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-07-09 17:57:02,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:57:02,861 INFO L225 Difference]: With dead ends: 57 [2021-07-09 17:57:02,862 INFO L226 Difference]: Without dead ends: 42 [2021-07-09 17:57:02,864 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-09 17:57:02,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-07-09 17:57:02,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 40. [2021-07-09 17:57:02,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.8205128205128205) internal successors, (71), 39 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) [2021-07-09 17:57:02,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 71 transitions. [2021-07-09 17:57:02,899 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 71 transitions. Word has length 14 [2021-07-09 17:57:02,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:57:02,899 INFO L482 AbstractCegarLoop]: Abstraction has 40 states and 71 transitions. [2021-07-09 17:57:02,899 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:02,900 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 71 transitions. [2021-07-09 17:57:02,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-09 17:57:02,901 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:57:02,902 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:57:02,902 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-07-09 17:57:02,902 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:57:02,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:57:02,908 INFO L82 PathProgramCache]: Analyzing trace with hash -1800134561, now seen corresponding path program 1 times [2021-07-09 17:57:02,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:57:02,909 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690572994] [2021-07-09 17:57:02,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:57:02,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:57:02,994 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:57:02,994 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:57:02,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690572994] [2021-07-09 17:57:02,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690572994] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:02,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [475274610] [2021-07-09 17:57:02,995 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 [2021-07-09 17:57:03,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:57:03,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 5 conjunts are in the unsatisfiable core [2021-07-09 17:57:03,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:57:03,132 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:57:03,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [475274610] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:03,133 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:57:03,133 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 9 [2021-07-09 17:57:03,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434736833] [2021-07-09 17:57:03,134 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:57:03,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:57:03,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:57:03,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:57:03,135 INFO L87 Difference]: Start difference. First operand 40 states and 71 transitions. Second operand has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 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) [2021-07-09 17:57:03,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:57:03,263 INFO L93 Difference]: Finished difference Result 63 states and 108 transitions. [2021-07-09 17:57:03,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-09 17:57:03,263 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 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 16 [2021-07-09 17:57:03,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:57:03,265 INFO L225 Difference]: With dead ends: 63 [2021-07-09 17:57:03,265 INFO L226 Difference]: Without dead ends: 63 [2021-07-09 17:57:03,266 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 131.9ms TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:57:03,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-07-09 17:57:03,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 45. [2021-07-09 17:57:03,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.8181818181818181) internal successors, (80), 44 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:03,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 80 transitions. [2021-07-09 17:57:03,280 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 80 transitions. Word has length 16 [2021-07-09 17:57:03,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:57:03,281 INFO L482 AbstractCegarLoop]: Abstraction has 45 states and 80 transitions. [2021-07-09 17:57:03,281 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 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) [2021-07-09 17:57:03,281 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 80 transitions. [2021-07-09 17:57:03,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-09 17:57:03,282 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:57:03,282 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:57:03,489 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-07-09 17:57:03,490 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:57:03,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:57:03,490 INFO L82 PathProgramCache]: Analyzing trace with hash -1152959347, now seen corresponding path program 2 times [2021-07-09 17:57:03,491 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:57:03,491 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168525240] [2021-07-09 17:57:03,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:57:03,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:57:03,536 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:57:03,536 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:57:03,536 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168525240] [2021-07-09 17:57:03,536 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168525240] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 17:57:03,537 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 17:57:03,537 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-07-09 17:57:03,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727839286] [2021-07-09 17:57:03,537 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-09 17:57:03,537 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:57:03,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-09 17:57:03,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-07-09 17:57:03,538 INFO L87 Difference]: Start difference. First operand 45 states and 80 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:03,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:57:03,594 INFO L93 Difference]: Finished difference Result 50 states and 88 transitions. [2021-07-09 17:57:03,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-09 17:57:03,595 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-09 17:57:03,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:57:03,597 INFO L225 Difference]: With dead ends: 50 [2021-07-09 17:57:03,600 INFO L226 Difference]: Without dead ends: 48 [2021-07-09 17:57:03,600 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 36.9ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:57:03,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-07-09 17:57:03,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 43. [2021-07-09 17:57:03,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.8095238095238095) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:03,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 76 transitions. [2021-07-09 17:57:03,603 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 76 transitions. Word has length 16 [2021-07-09 17:57:03,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:57:03,603 INFO L482 AbstractCegarLoop]: Abstraction has 43 states and 76 transitions. [2021-07-09 17:57:03,603 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:03,603 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 76 transitions. [2021-07-09 17:57:03,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:57:03,604 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:57:03,604 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:57:03,604 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-07-09 17:57:03,604 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:57:03,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:57:03,605 INFO L82 PathProgramCache]: Analyzing trace with hash 19790621, now seen corresponding path program 1 times [2021-07-09 17:57:03,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:57:03,605 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110985527] [2021-07-09 17:57:03,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:57:03,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:57:03,647 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:57:03,647 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:57:03,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110985527] [2021-07-09 17:57:03,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110985527] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:03,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1747759655] [2021-07-09 17:57:03,648 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 [2021-07-09 17:57:03,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:57:03,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 17:57:03,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:57:03,749 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:57:03,749 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1747759655] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:03,749 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:57:03,749 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-07-09 17:57:03,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079495530] [2021-07-09 17:57:03,749 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-09 17:57:03,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:57:03,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-09 17:57:03,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-09 17:57:03,750 INFO L87 Difference]: Start difference. First operand 43 states and 76 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 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) [2021-07-09 17:57:03,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:57:03,759 INFO L93 Difference]: Finished difference Result 96 states and 173 transitions. [2021-07-09 17:57:03,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-09 17:57:03,760 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 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 18 [2021-07-09 17:57:03,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:57:03,760 INFO L225 Difference]: With dead ends: 96 [2021-07-09 17:57:03,760 INFO L226 Difference]: Without dead ends: 75 [2021-07-09 17:57:03,760 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.5ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-09 17:57:03,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-07-09 17:57:03,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 58. [2021-07-09 17:57:03,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 1.912280701754386) internal successors, (109), 57 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:03,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 109 transitions. [2021-07-09 17:57:03,764 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 109 transitions. Word has length 18 [2021-07-09 17:57:03,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:57:03,765 INFO L482 AbstractCegarLoop]: Abstraction has 58 states and 109 transitions. [2021-07-09 17:57:03,765 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 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) [2021-07-09 17:57:03,765 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 109 transitions. [2021-07-09 17:57:03,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:57:03,765 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:57:03,765 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:57:03,968 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:57:03,969 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:57:03,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:57:03,969 INFO L82 PathProgramCache]: Analyzing trace with hash 1443468059, now seen corresponding path program 2 times [2021-07-09 17:57:03,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:57:03,970 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452356827] [2021-07-09 17:57:03,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:57:03,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:57:04,036 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:57:04,037 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:57:04,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452356827] [2021-07-09 17:57:04,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452356827] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:04,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671806005] [2021-07-09 17:57:04,037 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-09 17:57:04,067 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:57:04,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:57:04,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 17:57:04,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:57:04,194 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:57:04,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1671806005] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:04,194 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:57:04,194 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2021-07-09 17:57:04,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923239617] [2021-07-09 17:57:04,194 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:57:04,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:57:04,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:57:04,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:57:04,195 INFO L87 Difference]: Start difference. First operand 58 states and 109 transitions. Second operand has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 13 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) [2021-07-09 17:57:04,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:57:04,458 INFO L93 Difference]: Finished difference Result 173 states and 308 transitions. [2021-07-09 17:57:04,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:57:04,459 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 13 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 20 [2021-07-09 17:57:04,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:57:04,460 INFO L225 Difference]: With dead ends: 173 [2021-07-09 17:57:04,460 INFO L226 Difference]: Without dead ends: 167 [2021-07-09 17:57:04,461 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 228.8ms TimeCoverageRelationStatistics Valid=185, Invalid=465, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:57:04,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-07-09 17:57:04,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 67. [2021-07-09 17:57:04,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.9545454545454546) internal successors, (129), 66 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:04,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 129 transitions. [2021-07-09 17:57:04,466 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 129 transitions. Word has length 20 [2021-07-09 17:57:04,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:57:04,466 INFO L482 AbstractCegarLoop]: Abstraction has 67 states and 129 transitions. [2021-07-09 17:57:04,466 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 13 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) [2021-07-09 17:57:04,466 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 129 transitions. [2021-07-09 17:57:04,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:57:04,467 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:57:04,467 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:57:04,683 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:57:04,683 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:57:04,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:57:04,684 INFO L82 PathProgramCache]: Analyzing trace with hash 1693280397, now seen corresponding path program 3 times [2021-07-09 17:57:04,684 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:57:04,684 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706027224] [2021-07-09 17:57:04,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:57:04,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:57:04,740 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:57:04,741 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:57:04,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706027224] [2021-07-09 17:57:04,741 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706027224] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:04,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307089428] [2021-07-09 17:57:04,741 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 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 [2021-07-09 17:57:04,766 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:57:04,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:57:04,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 17:57:04,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:57:04,879 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:57:04,879 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1307089428] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:04,879 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:57:04,879 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-07-09 17:57:04,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651727912] [2021-07-09 17:57:04,883 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:57:04,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:57:04,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:57:04,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:57:04,883 INFO L87 Difference]: Start difference. First operand 67 states and 129 transitions. Second operand has 12 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:05,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:57:05,127 INFO L93 Difference]: Finished difference Result 145 states and 267 transitions. [2021-07-09 17:57:05,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:57:05,127 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:57:05,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:57:05,129 INFO L225 Difference]: With dead ends: 145 [2021-07-09 17:57:05,129 INFO L226 Difference]: Without dead ends: 141 [2021-07-09 17:57:05,129 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 230.1ms TimeCoverageRelationStatistics Valid=176, Invalid=424, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:57:05,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-07-09 17:57:05,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 66. [2021-07-09 17:57:05,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 1.9384615384615385) internal successors, (126), 65 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:05,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 126 transitions. [2021-07-09 17:57:05,144 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 126 transitions. Word has length 20 [2021-07-09 17:57:05,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:57:05,144 INFO L482 AbstractCegarLoop]: Abstraction has 66 states and 126 transitions. [2021-07-09 17:57:05,145 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:05,145 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 126 transitions. [2021-07-09 17:57:05,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:57:05,146 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:57:05,146 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:57:05,360 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:57:05,361 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:57:05,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:57:05,361 INFO L82 PathProgramCache]: Analyzing trace with hash -1024348455, now seen corresponding path program 4 times [2021-07-09 17:57:05,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:57:05,361 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345686582] [2021-07-09 17:57:05,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:57:05,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:57:05,402 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:57:05,402 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:57:05,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345686582] [2021-07-09 17:57:05,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1345686582] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:05,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621692368] [2021-07-09 17:57:05,402 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-09 17:57:05,434 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:57:05,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:57:05,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 17:57:05,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:57:05,479 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:57:05,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [621692368] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:05,479 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:57:05,480 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-07-09 17:57:05,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705009726] [2021-07-09 17:57:05,480 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-09 17:57:05,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:57:05,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-09 17:57:05,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-07-09 17:57:05,480 INFO L87 Difference]: Start difference. First operand 66 states and 126 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:05,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:57:05,497 INFO L93 Difference]: Finished difference Result 162 states and 309 transitions. [2021-07-09 17:57:05,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-09 17:57:05,497 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:57:05,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:57:05,498 INFO L225 Difference]: With dead ends: 162 [2021-07-09 17:57:05,498 INFO L226 Difference]: Without dead ends: 135 [2021-07-09 17:57:05,499 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.8ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-07-09 17:57:05,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-07-09 17:57:05,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 105. [2021-07-09 17:57:05,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 2.048076923076923) internal successors, (213), 104 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:05,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 213 transitions. [2021-07-09 17:57:05,509 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 213 transitions. Word has length 22 [2021-07-09 17:57:05,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:57:05,509 INFO L482 AbstractCegarLoop]: Abstraction has 105 states and 213 transitions. [2021-07-09 17:57:05,509 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:05,509 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 213 transitions. [2021-07-09 17:57:05,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:57:05,513 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:57:05,513 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:57:05,724 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-07-09 17:57:05,725 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:57:05,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:57:05,725 INFO L82 PathProgramCache]: Analyzing trace with hash -1876617257, now seen corresponding path program 5 times [2021-07-09 17:57:05,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:57:05,725 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633273541] [2021-07-09 17:57:05,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:57:05,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:57:05,807 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:57:05,807 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:57:05,807 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633273541] [2021-07-09 17:57:05,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633273541] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:05,807 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [270923348] [2021-07-09 17:57:05,807 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:57:05,831 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:57:05,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:57:05,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 17:57:05,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:57:05,961 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:57:05,961 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [270923348] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:05,961 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:57:05,962 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-07-09 17:57:05,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423597025] [2021-07-09 17:57:05,962 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:57:05,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:57:05,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:57:05,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:57:05,963 INFO L87 Difference]: Start difference. First operand 105 states and 213 transitions. Second operand has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:06,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:57:06,432 INFO L93 Difference]: Finished difference Result 364 states and 691 transitions. [2021-07-09 17:57:06,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 17:57:06,435 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:57:06,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:57:06,436 INFO L225 Difference]: With dead ends: 364 [2021-07-09 17:57:06,436 INFO L226 Difference]: Without dead ends: 334 [2021-07-09 17:57:06,436 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 406.7ms TimeCoverageRelationStatistics Valid=402, Invalid=1080, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 17:57:06,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2021-07-09 17:57:06,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 92. [2021-07-09 17:57:06,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 1.967032967032967) internal successors, (179), 91 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:06,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 179 transitions. [2021-07-09 17:57:06,440 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 179 transitions. Word has length 24 [2021-07-09 17:57:06,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:57:06,440 INFO L482 AbstractCegarLoop]: Abstraction has 92 states and 179 transitions. [2021-07-09 17:57:06,440 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:06,440 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 179 transitions. [2021-07-09 17:57:06,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:57:06,441 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:57:06,441 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:57:06,656 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:57:06,657 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:57:06,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:57:06,657 INFO L82 PathProgramCache]: Analyzing trace with hash -1240439411, now seen corresponding path program 6 times [2021-07-09 17:57:06,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:57:06,657 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615591912] [2021-07-09 17:57:06,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:57:06,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:57:06,708 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:57:06,708 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:57:06,709 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615591912] [2021-07-09 17:57:06,709 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1615591912] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:06,709 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [892601550] [2021-07-09 17:57:06,709 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 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 [2021-07-09 17:57:06,737 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-09 17:57:06,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:57:06,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 17:57:06,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:57:06,854 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:57:06,854 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [892601550] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:06,854 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:57:06,854 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 14 [2021-07-09 17:57:06,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354894604] [2021-07-09 17:57:06,855 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:57:06,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:57:06,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:57:06,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:57:06,855 INFO L87 Difference]: Start difference. First operand 92 states and 179 transitions. Second operand has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:07,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:57:07,304 INFO L93 Difference]: Finished difference Result 239 states and 453 transitions. [2021-07-09 17:57:07,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 17:57:07,304 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:57:07,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:57:07,305 INFO L225 Difference]: With dead ends: 239 [2021-07-09 17:57:07,305 INFO L226 Difference]: Without dead ends: 235 [2021-07-09 17:57:07,306 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 389.9ms TimeCoverageRelationStatistics Valid=356, Invalid=976, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 17:57:07,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2021-07-09 17:57:07,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 84. [2021-07-09 17:57:07,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 1.9759036144578312) internal successors, (164), 83 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:07,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 164 transitions. [2021-07-09 17:57:07,309 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 164 transitions. Word has length 24 [2021-07-09 17:57:07,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:57:07,309 INFO L482 AbstractCegarLoop]: Abstraction has 84 states and 164 transitions. [2021-07-09 17:57:07,309 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:07,309 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 164 transitions. [2021-07-09 17:57:07,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 17:57:07,309 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:57:07,309 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:57:07,525 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:57:07,525 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:57:07,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:57:07,525 INFO L82 PathProgramCache]: Analyzing trace with hash -465636203, now seen corresponding path program 7 times [2021-07-09 17:57:07,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:57:07,525 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104483932] [2021-07-09 17:57:07,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:57:07,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:57:07,566 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:57:07,566 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:57:07,566 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104483932] [2021-07-09 17:57:07,566 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104483932] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:07,566 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [534429665] [2021-07-09 17:57:07,566 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 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 [2021-07-09 17:57:07,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:57:07,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:57:07,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:57:07,645 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:57:07,645 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [534429665] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:07,645 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:57:07,645 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-07-09 17:57:07,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298370964] [2021-07-09 17:57:07,645 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-09 17:57:07,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:57:07,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-09 17:57:07,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-07-09 17:57:07,646 INFO L87 Difference]: Start difference. First operand 84 states and 164 transitions. Second operand has 6 states, 6 states have (on average 4.333333333333333) 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) [2021-07-09 17:57:07,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:57:07,667 INFO L93 Difference]: Finished difference Result 221 states and 426 transitions. [2021-07-09 17:57:07,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-09 17:57:07,667 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.333333333333333) 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 26 [2021-07-09 17:57:07,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:57:07,668 INFO L225 Difference]: With dead ends: 221 [2021-07-09 17:57:07,668 INFO L226 Difference]: Without dead ends: 188 [2021-07-09 17:57:07,668 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.1ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-07-09 17:57:07,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-07-09 17:57:07,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 145. [2021-07-09 17:57:07,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 2.0833333333333335) internal successors, (300), 144 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:07,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 300 transitions. [2021-07-09 17:57:07,672 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 300 transitions. Word has length 26 [2021-07-09 17:57:07,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:57:07,672 INFO L482 AbstractCegarLoop]: Abstraction has 145 states and 300 transitions. [2021-07-09 17:57:07,672 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.333333333333333) 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) [2021-07-09 17:57:07,672 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 300 transitions. [2021-07-09 17:57:07,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 17:57:07,672 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:57:07,672 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:57:07,876 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-07-09 17:57:07,877 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:57:07,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:57:07,877 INFO L82 PathProgramCache]: Analyzing trace with hash -1485197677, now seen corresponding path program 8 times [2021-07-09 17:57:07,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:57:07,877 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058775257] [2021-07-09 17:57:07,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:57:07,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:57:07,962 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:57:07,963 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:57:07,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058775257] [2021-07-09 17:57:07,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058775257] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:07,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1401613735] [2021-07-09 17:57:07,963 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:57:07,986 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:57:07,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:57:07,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 17:57:07,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:57:08,189 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:57:08,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1401613735] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:08,189 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:57:08,189 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2021-07-09 17:57:08,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836227531] [2021-07-09 17:57:08,189 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 17:57:08,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:57:08,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 17:57:08,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=365, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:57:08,190 INFO L87 Difference]: Start difference. First operand 145 states and 300 transitions. Second operand has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:08,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:57:08,937 INFO L93 Difference]: Finished difference Result 561 states and 1077 transitions. [2021-07-09 17:57:08,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-09 17:57:08,937 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 17:57:08,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:57:08,939 INFO L225 Difference]: With dead ends: 561 [2021-07-09 17:57:08,939 INFO L226 Difference]: Without dead ends: 495 [2021-07-09 17:57:08,940 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 706 ImplicationChecksByTransitivity, 640.8ms TimeCoverageRelationStatistics Valid=757, Invalid=2105, Unknown=0, NotChecked=0, Total=2862 [2021-07-09 17:57:08,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2021-07-09 17:57:08,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 114. [2021-07-09 17:57:08,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 1.991150442477876) internal successors, (225), 113 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:08,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 225 transitions. [2021-07-09 17:57:08,944 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 225 transitions. Word has length 28 [2021-07-09 17:57:08,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:57:08,944 INFO L482 AbstractCegarLoop]: Abstraction has 114 states and 225 transitions. [2021-07-09 17:57:08,944 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:08,944 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 225 transitions. [2021-07-09 17:57:08,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 17:57:08,945 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:57:08,946 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:57:09,160 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:57:09,161 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:57:09,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:57:09,161 INFO L82 PathProgramCache]: Analyzing trace with hash 1081045901, now seen corresponding path program 9 times [2021-07-09 17:57:09,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:57:09,161 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430809709] [2021-07-09 17:57:09,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:57:09,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:57:09,210 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:57:09,210 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:57:09,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430809709] [2021-07-09 17:57:09,210 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430809709] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:09,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [170033156] [2021-07-09 17:57:09,210 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 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 [2021-07-09 17:57:09,238 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-07-09 17:57:09,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:57:09,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 17:57:09,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:57:09,412 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:57:09,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [170033156] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:09,412 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:57:09,412 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 17 [2021-07-09 17:57:09,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589408294] [2021-07-09 17:57:09,412 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:57:09,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:57:09,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:57:09,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:57:09,413 INFO L87 Difference]: Start difference. First operand 114 states and 225 transitions. Second operand has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:10,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:57:10,055 INFO L93 Difference]: Finished difference Result 351 states and 677 transitions. [2021-07-09 17:57:10,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-07-09 17:57:10,056 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 17:57:10,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:57:10,057 INFO L225 Difference]: With dead ends: 351 [2021-07-09 17:57:10,057 INFO L226 Difference]: Without dead ends: 347 [2021-07-09 17:57:10,057 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 682 ImplicationChecksByTransitivity, 571.2ms TimeCoverageRelationStatistics Valid=647, Invalid=1903, Unknown=0, NotChecked=0, Total=2550 [2021-07-09 17:57:10,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2021-07-09 17:57:10,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 102. [2021-07-09 17:57:10,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 2.0) internal successors, (202), 101 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:10,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 202 transitions. [2021-07-09 17:57:10,061 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 202 transitions. Word has length 28 [2021-07-09 17:57:10,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:57:10,061 INFO L482 AbstractCegarLoop]: Abstraction has 102 states and 202 transitions. [2021-07-09 17:57:10,061 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:10,061 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 202 transitions. [2021-07-09 17:57:10,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:57:10,061 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:57:10,061 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:57:10,269 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:57:10,269 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:57:10,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:57:10,269 INFO L82 PathProgramCache]: Analyzing trace with hash 2026425425, now seen corresponding path program 10 times [2021-07-09 17:57:10,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:57:10,269 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132020527] [2021-07-09 17:57:10,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:57:10,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:57:10,323 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:57:10,323 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:57:10,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132020527] [2021-07-09 17:57:10,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132020527] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:10,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2126554495] [2021-07-09 17:57:10,324 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 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 [2021-07-09 17:57:10,374 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:57:10,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:57:10,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 17:57:10,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:57:10,436 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:57:10,437 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2126554495] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:10,437 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:57:10,437 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-07-09 17:57:10,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988234737] [2021-07-09 17:57:10,437 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-09 17:57:10,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:57:10,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-09 17:57:10,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-07-09 17:57:10,438 INFO L87 Difference]: Start difference. First operand 102 states and 202 transitions. Second operand has 7 states, 7 states have (on average 4.285714285714286) 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) [2021-07-09 17:57:10,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:57:10,486 INFO L93 Difference]: Finished difference Result 280 states and 543 transitions. [2021-07-09 17:57:10,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-09 17:57:10,487 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.285714285714286) 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 30 [2021-07-09 17:57:10,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:57:10,488 INFO L225 Difference]: With dead ends: 280 [2021-07-09 17:57:10,488 INFO L226 Difference]: Without dead ends: 241 [2021-07-09 17:57:10,488 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.3ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-07-09 17:57:10,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2021-07-09 17:57:10,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 185. [2021-07-09 17:57:10,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 184 states have (on average 2.1032608695652173) internal successors, (387), 184 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:10,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 387 transitions. [2021-07-09 17:57:10,492 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 387 transitions. Word has length 30 [2021-07-09 17:57:10,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:57:10,492 INFO L482 AbstractCegarLoop]: Abstraction has 185 states and 387 transitions. [2021-07-09 17:57:10,492 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.285714285714286) 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) [2021-07-09 17:57:10,492 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 387 transitions. [2021-07-09 17:57:10,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 17:57:10,493 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:57:10,493 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:57:10,709 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-07-09 17:57:10,709 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:57:10,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:57:10,709 INFO L82 PathProgramCache]: Analyzing trace with hash 1274697551, now seen corresponding path program 11 times [2021-07-09 17:57:10,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:57:10,709 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179668593] [2021-07-09 17:57:10,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:57:10,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:57:10,804 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:57:10,804 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:57:10,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179668593] [2021-07-09 17:57:10,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179668593] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:10,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577194592] [2021-07-09 17:57:10,805 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 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 [2021-07-09 17:57:10,832 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-09 17:57:10,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:57:10,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:57:10,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:57:11,046 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:57:11,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [577194592] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:11,047 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:57:11,047 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 25 [2021-07-09 17:57:11,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513213643] [2021-07-09 17:57:11,047 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-09 17:57:11,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:57:11,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-09 17:57:11,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=519, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:57:11,048 INFO L87 Difference]: Start difference. First operand 185 states and 387 transitions. Second operand has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 25 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:12,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:57:12,108 INFO L93 Difference]: Finished difference Result 786 states and 1519 transitions. [2021-07-09 17:57:12,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-07-09 17:57:12,109 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 25 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-09 17:57:12,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:57:12,111 INFO L225 Difference]: With dead ends: 786 [2021-07-09 17:57:12,111 INFO L226 Difference]: Without dead ends: 678 [2021-07-09 17:57:12,112 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1341 ImplicationChecksByTransitivity, 920.1ms TimeCoverageRelationStatistics Valid=1299, Invalid=3671, Unknown=0, NotChecked=0, Total=4970 [2021-07-09 17:57:12,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 678 states. [2021-07-09 17:57:12,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 678 to 136. [2021-07-09 17:57:12,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 2.0074074074074075) internal successors, (271), 135 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:12,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 271 transitions. [2021-07-09 17:57:12,117 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 271 transitions. Word has length 32 [2021-07-09 17:57:12,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:57:12,117 INFO L482 AbstractCegarLoop]: Abstraction has 136 states and 271 transitions. [2021-07-09 17:57:12,117 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 25 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:12,117 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 271 transitions. [2021-07-09 17:57:12,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 17:57:12,118 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:57:12,118 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:57:12,332 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-07-09 17:57:12,333 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:57:12,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:57:12,333 INFO L82 PathProgramCache]: Analyzing trace with hash -1086729587, now seen corresponding path program 12 times [2021-07-09 17:57:12,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:57:12,333 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213106234] [2021-07-09 17:57:12,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:57:12,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:57:12,400 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 21 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:57:12,400 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:57:12,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213106234] [2021-07-09 17:57:12,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213106234] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:12,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276013532] [2021-07-09 17:57:12,400 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:57:12,427 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-07-09 17:57:12,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:57:12,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:57:12,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:57:12,619 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 21 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:57:12,619 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1276013532] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:12,619 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:57:12,620 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13] total 20 [2021-07-09 17:57:12,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192136185] [2021-07-09 17:57:12,620 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:57:12,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:57:12,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:57:12,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=319, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:57:12,621 INFO L87 Difference]: Start difference. First operand 136 states and 271 transitions. Second operand has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 20 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:13,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:57:13,590 INFO L93 Difference]: Finished difference Result 485 states and 945 transitions. [2021-07-09 17:57:13,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-07-09 17:57:13,590 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 20 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-09 17:57:13,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:57:13,592 INFO L225 Difference]: With dead ends: 485 [2021-07-09 17:57:13,592 INFO L226 Difference]: Without dead ends: 481 [2021-07-09 17:57:13,593 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1312 ImplicationChecksByTransitivity, 858.3ms TimeCoverageRelationStatistics Valid=1088, Invalid=3334, Unknown=0, NotChecked=0, Total=4422 [2021-07-09 17:57:13,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 481 states. [2021-07-09 17:57:13,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 481 to 120. [2021-07-09 17:57:13,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 119 states have (on average 2.0168067226890756) internal successors, (240), 119 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:13,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 240 transitions. [2021-07-09 17:57:13,609 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 240 transitions. Word has length 32 [2021-07-09 17:57:13,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:57:13,609 INFO L482 AbstractCegarLoop]: Abstraction has 120 states and 240 transitions. [2021-07-09 17:57:13,609 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 20 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:13,609 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 240 transitions. [2021-07-09 17:57:13,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-07-09 17:57:13,609 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:57:13,609 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:57:13,823 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-07-09 17:57:13,823 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:57:13,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:57:13,823 INFO L82 PathProgramCache]: Analyzing trace with hash -4049395, now seen corresponding path program 13 times [2021-07-09 17:57:13,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:57:13,824 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6004463] [2021-07-09 17:57:13,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:57:13,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:57:13,889 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:57:13,889 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:57:13,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6004463] [2021-07-09 17:57:13,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6004463] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:13,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2032093100] [2021-07-09 17:57:13,890 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:57:13,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:57:13,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:57:13,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:57:13,969 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:57:13,969 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2032093100] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:13,969 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:57:13,969 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-07-09 17:57:13,970 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217063364] [2021-07-09 17:57:13,970 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-09 17:57:13,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:57:13,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-09 17:57:13,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-07-09 17:57:13,970 INFO L87 Difference]: Start difference. First operand 120 states and 240 transitions. Second operand has 8 states, 8 states have (on average 4.25) internal successors, (34), 8 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) [2021-07-09 17:57:14,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:57:14,013 INFO L93 Difference]: Finished difference Result 339 states and 660 transitions. [2021-07-09 17:57:14,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-09 17:57:14,014 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 8 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 34 [2021-07-09 17:57:14,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:57:14,015 INFO L225 Difference]: With dead ends: 339 [2021-07-09 17:57:14,015 INFO L226 Difference]: Without dead ends: 294 [2021-07-09 17:57:14,015 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 33.2ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-07-09 17:57:14,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2021-07-09 17:57:14,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 225. [2021-07-09 17:57:14,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 224 states have (on average 2.1160714285714284) internal successors, (474), 224 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:14,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 474 transitions. [2021-07-09 17:57:14,020 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 474 transitions. Word has length 34 [2021-07-09 17:57:14,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:57:14,020 INFO L482 AbstractCegarLoop]: Abstraction has 225 states and 474 transitions. [2021-07-09 17:57:14,020 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 8 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) [2021-07-09 17:57:14,020 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 474 transitions. [2021-07-09 17:57:14,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 17:57:14,021 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:57:14,021 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:57:14,232 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:57:14,233 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:57:14,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:57:14,233 INFO L82 PathProgramCache]: Analyzing trace with hash 2031751691, now seen corresponding path program 14 times [2021-07-09 17:57:14,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:57:14,233 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66236162] [2021-07-09 17:57:14,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:57:14,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:57:14,358 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:57:14,358 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:57:14,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66236162] [2021-07-09 17:57:14,358 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [66236162] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:14,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1166908741] [2021-07-09 17:57:14,358 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:57:14,383 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:57:14,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:57:14,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:57:14,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:57:14,664 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:57:14,665 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1166908741] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:14,665 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:57:14,665 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 29 [2021-07-09 17:57:14,665 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008817661] [2021-07-09 17:57:14,665 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-07-09 17:57:14,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:57:14,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-07-09 17:57:14,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=700, Unknown=0, NotChecked=0, Total=870 [2021-07-09 17:57:14,666 INFO L87 Difference]: Start difference. First operand 225 states and 474 transitions. Second operand has 30 states, 30 states have (on average 2.2) internal successors, (66), 29 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:16,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:57:16,092 INFO L93 Difference]: Finished difference Result 1039 states and 2017 transitions. [2021-07-09 17:57:16,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-07-09 17:57:16,093 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.2) internal successors, (66), 29 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 17:57:16,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:57:16,095 INFO L225 Difference]: With dead ends: 1039 [2021-07-09 17:57:16,095 INFO L226 Difference]: Without dead ends: 883 [2021-07-09 17:57:16,097 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2332 ImplicationChecksByTransitivity, 1278.8ms TimeCoverageRelationStatistics Valid=2085, Invalid=5925, Unknown=0, NotChecked=0, Total=8010 [2021-07-09 17:57:16,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 883 states. [2021-07-09 17:57:16,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 883 to 158. [2021-07-09 17:57:16,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 2.0191082802547773) internal successors, (317), 157 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:16,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 317 transitions. [2021-07-09 17:57:16,103 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 317 transitions. Word has length 36 [2021-07-09 17:57:16,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:57:16,104 INFO L482 AbstractCegarLoop]: Abstraction has 158 states and 317 transitions. [2021-07-09 17:57:16,104 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.2) internal successors, (66), 29 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:16,104 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 317 transitions. [2021-07-09 17:57:16,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 17:57:16,104 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:57:16,104 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:57:16,320 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-07-09 17:57:16,321 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:57:16,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:57:16,321 INFO L82 PathProgramCache]: Analyzing trace with hash 1527693965, now seen corresponding path program 15 times [2021-07-09 17:57:16,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:57:16,321 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548609191] [2021-07-09 17:57:16,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:57:16,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:57:16,395 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 31 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:57:16,396 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:57:16,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548609191] [2021-07-09 17:57:16,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548609191] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:16,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1098475639] [2021-07-09 17:57:16,396 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:57:16,426 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-07-09 17:57:16,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:57:16,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:57:16,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:57:16,656 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 31 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:57:16,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1098475639] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:16,656 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:57:16,656 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15] total 23 [2021-07-09 17:57:16,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31442740] [2021-07-09 17:57:16,657 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:57:16,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:57:16,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:57:16,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=424, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:57:16,657 INFO L87 Difference]: Start difference. First operand 158 states and 317 transitions. Second operand has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 23 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:17,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:57:17,936 INFO L93 Difference]: Finished difference Result 641 states and 1257 transitions. [2021-07-09 17:57:17,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-07-09 17:57:17,937 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 23 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 17:57:17,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:57:17,938 INFO L225 Difference]: With dead ends: 641 [2021-07-09 17:57:17,938 INFO L226 Difference]: Without dead ends: 637 [2021-07-09 17:57:17,940 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2300 ImplicationChecksByTransitivity, 1180.9ms TimeCoverageRelationStatistics Valid=1724, Invalid=5416, Unknown=0, NotChecked=0, Total=7140 [2021-07-09 17:57:17,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 637 states. [2021-07-09 17:57:17,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 637 to 138. [2021-07-09 17:57:17,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 2.0291970802919708) internal successors, (278), 137 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:17,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 278 transitions. [2021-07-09 17:57:17,944 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 278 transitions. Word has length 36 [2021-07-09 17:57:17,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:57:17,944 INFO L482 AbstractCegarLoop]: Abstraction has 138 states and 278 transitions. [2021-07-09 17:57:17,944 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 23 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:17,944 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 278 transitions. [2021-07-09 17:57:17,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-07-09 17:57:17,945 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:57:17,945 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:57:18,158 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-07-09 17:57:18,158 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:57:18,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:57:18,159 INFO L82 PathProgramCache]: Analyzing trace with hash 1675506121, now seen corresponding path program 16 times [2021-07-09 17:57:18,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:57:18,159 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791142203] [2021-07-09 17:57:18,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:57:18,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:57:18,221 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:57:18,221 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:57:18,221 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791142203] [2021-07-09 17:57:18,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791142203] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:18,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801376257] [2021-07-09 17:57:18,222 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 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 [2021-07-09 17:57:18,250 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:57:18,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:57:18,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 17:57:18,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:57:18,301 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:57:18,301 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1801376257] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:18,301 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:57:18,301 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-07-09 17:57:18,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963140791] [2021-07-09 17:57:18,301 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 17:57:18,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:57:18,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 17:57:18,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:57:18,305 INFO L87 Difference]: Start difference. First operand 138 states and 278 transitions. Second operand has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 9 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) [2021-07-09 17:57:18,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:57:18,383 INFO L93 Difference]: Finished difference Result 398 states and 777 transitions. [2021-07-09 17:57:18,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:57:18,384 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 9 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 38 [2021-07-09 17:57:18,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:57:18,385 INFO L225 Difference]: With dead ends: 398 [2021-07-09 17:57:18,385 INFO L226 Difference]: Without dead ends: 347 [2021-07-09 17:57:18,385 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 35.9ms TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:57:18,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2021-07-09 17:57:18,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 265. [2021-07-09 17:57:18,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 264 states have (on average 2.125) internal successors, (561), 264 states have internal predecessors, (561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:18,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 561 transitions. [2021-07-09 17:57:18,390 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 561 transitions. Word has length 38 [2021-07-09 17:57:18,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:57:18,390 INFO L482 AbstractCegarLoop]: Abstraction has 265 states and 561 transitions. [2021-07-09 17:57:18,390 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 9 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) [2021-07-09 17:57:18,390 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 561 transitions. [2021-07-09 17:57:18,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-09 17:57:18,390 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:57:18,391 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:57:18,607 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:57:18,607 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:57:18,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:57:18,607 INFO L82 PathProgramCache]: Analyzing trace with hash 1976295111, now seen corresponding path program 17 times [2021-07-09 17:57:18,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:57:18,607 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495502941] [2021-07-09 17:57:18,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:57:18,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:57:18,746 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 36 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:57:18,746 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:57:18,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495502941] [2021-07-09 17:57:18,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [495502941] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:18,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522890361] [2021-07-09 17:57:18,747 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:57:18,773 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-07-09 17:57:18,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:57:18,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-09 17:57:18,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:57:19,062 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 36 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:57:19,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [522890361] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:19,062 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:57:19,062 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 33 [2021-07-09 17:57:19,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977671771] [2021-07-09 17:57:19,062 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-07-09 17:57:19,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:57:19,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-07-09 17:57:19,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=908, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 17:57:19,063 INFO L87 Difference]: Start difference. First operand 265 states and 561 transitions. Second operand has 34 states, 34 states have (on average 2.176470588235294) internal successors, (74), 33 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:20,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:57:20,945 INFO L93 Difference]: Finished difference Result 1320 states and 2571 transitions. [2021-07-09 17:57:20,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-07-09 17:57:20,946 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.176470588235294) internal successors, (74), 33 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-09 17:57:20,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:57:20,949 INFO L225 Difference]: With dead ends: 1320 [2021-07-09 17:57:20,949 INFO L226 Difference]: Without dead ends: 1110 [2021-07-09 17:57:20,951 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3798 ImplicationChecksByTransitivity, 1697.8ms TimeCoverageRelationStatistics Valid=3180, Invalid=9030, Unknown=0, NotChecked=0, Total=12210 [2021-07-09 17:57:20,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1110 states. [2021-07-09 17:57:20,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1110 to 180. [2021-07-09 17:57:20,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 179 states have (on average 2.0279329608938546) internal successors, (363), 179 states have internal predecessors, (363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:20,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 363 transitions. [2021-07-09 17:57:20,957 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 363 transitions. Word has length 40 [2021-07-09 17:57:20,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:57:20,957 INFO L482 AbstractCegarLoop]: Abstraction has 180 states and 363 transitions. [2021-07-09 17:57:20,958 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.176470588235294) internal successors, (74), 33 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:20,958 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 363 transitions. [2021-07-09 17:57:20,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-09 17:57:20,958 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:57:20,958 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:57:21,174 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:57:21,174 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:57:21,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:57:21,175 INFO L82 PathProgramCache]: Analyzing trace with hash -302152819, now seen corresponding path program 18 times [2021-07-09 17:57:21,175 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:57:21,175 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35499896] [2021-07-09 17:57:21,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:57:21,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:57:21,246 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 43 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:57:21,246 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:57:21,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35499896] [2021-07-09 17:57:21,246 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [35499896] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:21,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849384763] [2021-07-09 17:57:21,247 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:57:21,339 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-07-09 17:57:21,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:57:21,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-09 17:57:21,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:57:21,609 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 43 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:57:21,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1849384763] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:21,609 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:57:21,609 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 17] total 26 [2021-07-09 17:57:21,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751557233] [2021-07-09 17:57:21,611 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-09 17:57:21,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:57:21,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-09 17:57:21,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=544, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:57:21,612 INFO L87 Difference]: Start difference. First operand 180 states and 363 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:23,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:57:23,386 INFO L93 Difference]: Finished difference Result 819 states and 1613 transitions. [2021-07-09 17:57:23,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-07-09 17:57:23,386 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-09 17:57:23,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:57:23,388 INFO L225 Difference]: With dead ends: 819 [2021-07-09 17:57:23,388 INFO L226 Difference]: Without dead ends: 815 [2021-07-09 17:57:23,391 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3762 ImplicationChecksByTransitivity, 1628.0ms TimeCoverageRelationStatistics Valid=2606, Invalid=8314, Unknown=0, NotChecked=0, Total=10920 [2021-07-09 17:57:23,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 815 states. [2021-07-09 17:57:23,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 815 to 156. [2021-07-09 17:57:23,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 2.0387096774193547) internal successors, (316), 155 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:23,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 316 transitions. [2021-07-09 17:57:23,395 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 316 transitions. Word has length 40 [2021-07-09 17:57:23,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:57:23,395 INFO L482 AbstractCegarLoop]: Abstraction has 156 states and 316 transitions. [2021-07-09 17:57:23,395 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:23,395 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 316 transitions. [2021-07-09 17:57:23,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-07-09 17:57:23,396 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:57:23,396 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:57:23,609 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:57:23,609 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:57:23,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:57:23,609 INFO L82 PathProgramCache]: Analyzing trace with hash -78659707, now seen corresponding path program 19 times [2021-07-09 17:57:23,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:57:23,609 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217329068] [2021-07-09 17:57:23,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:57:23,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:57:23,691 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:57:23,691 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:57:23,691 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217329068] [2021-07-09 17:57:23,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217329068] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:23,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [323444167] [2021-07-09 17:57:23,692 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-09 17:57:23,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:57:23,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:57:23,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:57:23,790 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:57:23,790 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [323444167] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:23,790 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:57:23,790 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-07-09 17:57:23,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033757631] [2021-07-09 17:57:23,790 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:57:23,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:57:23,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:57:23,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:57:23,791 INFO L87 Difference]: Start difference. First operand 156 states and 316 transitions. Second operand has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 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) [2021-07-09 17:57:23,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:57:23,867 INFO L93 Difference]: Finished difference Result 457 states and 894 transitions. [2021-07-09 17:57:23,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:57:23,868 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 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 42 [2021-07-09 17:57:23,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:57:23,869 INFO L225 Difference]: With dead ends: 457 [2021-07-09 17:57:23,869 INFO L226 Difference]: Without dead ends: 400 [2021-07-09 17:57:23,869 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 50.5ms TimeCoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:57:23,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2021-07-09 17:57:23,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 305. [2021-07-09 17:57:23,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 304 states have (on average 2.1315789473684212) internal successors, (648), 304 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:23,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 648 transitions. [2021-07-09 17:57:23,874 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 648 transitions. Word has length 42 [2021-07-09 17:57:23,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:57:23,874 INFO L482 AbstractCegarLoop]: Abstraction has 305 states and 648 transitions. [2021-07-09 17:57:23,874 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 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) [2021-07-09 17:57:23,874 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 648 transitions. [2021-07-09 17:57:23,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-07-09 17:57:23,875 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:57:23,875 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:57:24,093 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-07-09 17:57:24,093 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:57:24,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:57:24,093 INFO L82 PathProgramCache]: Analyzing trace with hash -729629309, now seen corresponding path program 20 times [2021-07-09 17:57:24,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:57:24,093 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156579829] [2021-07-09 17:57:24,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:57:24,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:57:24,256 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 49 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:57:24,256 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:57:24,256 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156579829] [2021-07-09 17:57:24,256 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156579829] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:24,256 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647159056] [2021-07-09 17:57:24,256 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:57:24,288 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:57:24,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:57:24,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 17:57:24,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:57:24,633 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 49 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:57:24,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1647159056] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:24,633 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:57:24,634 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 37 [2021-07-09 17:57:24,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822913156] [2021-07-09 17:57:24,634 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-07-09 17:57:24,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:57:24,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-07-09 17:57:24,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=263, Invalid=1143, Unknown=0, NotChecked=0, Total=1406 [2021-07-09 17:57:24,636 INFO L87 Difference]: Start difference. First operand 305 states and 648 transitions. Second operand has 38 states, 38 states have (on average 2.1578947368421053) internal successors, (82), 37 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:27,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:57:27,084 INFO L93 Difference]: Finished difference Result 1629 states and 3181 transitions. [2021-07-09 17:57:27,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2021-07-09 17:57:27,084 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.1578947368421053) internal successors, (82), 37 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-07-09 17:57:27,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:57:27,087 INFO L225 Difference]: With dead ends: 1629 [2021-07-09 17:57:27,087 INFO L226 Difference]: Without dead ends: 1359 [2021-07-09 17:57:27,088 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5875 ImplicationChecksByTransitivity, 2258.1ms TimeCoverageRelationStatistics Valid=4657, Invalid=13165, Unknown=0, NotChecked=0, Total=17822 [2021-07-09 17:57:27,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1359 states. [2021-07-09 17:57:27,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1359 to 202. [2021-07-09 17:57:27,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 201 states have (on average 2.0348258706467663) internal successors, (409), 201 states have internal predecessors, (409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:27,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 409 transitions. [2021-07-09 17:57:27,095 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 409 transitions. Word has length 44 [2021-07-09 17:57:27,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:57:27,095 INFO L482 AbstractCegarLoop]: Abstraction has 202 states and 409 transitions. [2021-07-09 17:57:27,095 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.1578947368421053) internal successors, (82), 37 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:27,095 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 409 transitions. [2021-07-09 17:57:27,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-07-09 17:57:27,096 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:57:27,096 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:57:27,308 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-07-09 17:57:27,309 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:57:27,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:57:27,309 INFO L82 PathProgramCache]: Analyzing trace with hash 1199920525, now seen corresponding path program 21 times [2021-07-09 17:57:27,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:57:27,309 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203600607] [2021-07-09 17:57:27,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:57:27,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:57:27,393 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 57 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:57:27,394 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:57:27,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203600607] [2021-07-09 17:57:27,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203600607] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:27,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1782265392] [2021-07-09 17:57:27,394 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:57:27,424 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-07-09 17:57:27,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:57:27,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 17:57:27,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:57:27,726 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 57 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:57:27,726 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1782265392] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:27,726 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:57:27,726 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 19] total 29 [2021-07-09 17:57:27,726 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410391131] [2021-07-09 17:57:27,727 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-07-09 17:57:27,727 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:57:27,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-07-09 17:57:27,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=679, Unknown=0, NotChecked=0, Total=870 [2021-07-09 17:57:27,727 INFO L87 Difference]: Start difference. First operand 202 states and 409 transitions. Second operand has 30 states, 30 states have (on average 2.6) internal successors, (78), 29 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:29,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:57:29,949 INFO L93 Difference]: Finished difference Result 1019 states and 2013 transitions. [2021-07-09 17:57:29,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2021-07-09 17:57:29,949 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.6) internal successors, (78), 29 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-07-09 17:57:29,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:57:29,952 INFO L225 Difference]: With dead ends: 1019 [2021-07-09 17:57:29,952 INFO L226 Difference]: Without dead ends: 1015 [2021-07-09 17:57:29,953 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5830 ImplicationChecksByTransitivity, 2082.6ms TimeCoverageRelationStatistics Valid=3791, Invalid=12211, Unknown=0, NotChecked=0, Total=16002 [2021-07-09 17:57:29,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1015 states. [2021-07-09 17:57:29,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1015 to 174. [2021-07-09 17:57:29,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 173 states have (on average 2.046242774566474) internal successors, (354), 173 states have internal predecessors, (354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:29,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 354 transitions. [2021-07-09 17:57:29,957 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 354 transitions. Word has length 44 [2021-07-09 17:57:29,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:57:29,957 INFO L482 AbstractCegarLoop]: Abstraction has 174 states and 354 transitions. [2021-07-09 17:57:29,958 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.6) internal successors, (78), 29 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:29,958 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 354 transitions. [2021-07-09 17:57:29,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-07-09 17:57:29,958 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:57:29,958 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:57:30,174 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:57:30,174 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:57:30,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:57:30,174 INFO L82 PathProgramCache]: Analyzing trace with hash -2016813247, now seen corresponding path program 22 times [2021-07-09 17:57:30,174 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:57:30,174 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598845486] [2021-07-09 17:57:30,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:57:30,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:57:30,252 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:57:30,253 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:57:30,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598845486] [2021-07-09 17:57:30,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598845486] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:30,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [548264949] [2021-07-09 17:57:30,253 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 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 [2021-07-09 17:57:30,279 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:57:30,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:57:30,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 35 conjunts are in the unsatisfiable core [2021-07-09 17:57:30,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:57:30,355 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:57:30,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [548264949] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:30,355 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:57:30,355 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-07-09 17:57:30,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765057716] [2021-07-09 17:57:30,355 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:57:30,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:57:30,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:57:30,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:57:30,356 INFO L87 Difference]: Start difference. First operand 174 states and 354 transitions. Second operand has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 11 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:30,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:57:30,448 INFO L93 Difference]: Finished difference Result 516 states and 1011 transitions. [2021-07-09 17:57:30,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:57:30,449 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 11 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-07-09 17:57:30,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:57:30,450 INFO L225 Difference]: With dead ends: 516 [2021-07-09 17:57:30,450 INFO L226 Difference]: Without dead ends: 453 [2021-07-09 17:57:30,450 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 53.9ms TimeCoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:57:30,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2021-07-09 17:57:30,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 345. [2021-07-09 17:57:30,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 344 states have (on average 2.136627906976744) internal successors, (735), 344 states have internal predecessors, (735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:30,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 735 transitions. [2021-07-09 17:57:30,457 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 735 transitions. Word has length 46 [2021-07-09 17:57:30,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:57:30,457 INFO L482 AbstractCegarLoop]: Abstraction has 345 states and 735 transitions. [2021-07-09 17:57:30,457 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 11 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:30,457 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 735 transitions. [2021-07-09 17:57:30,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-07-09 17:57:30,457 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:57:30,458 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:57:30,668 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-07-09 17:57:30,669 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:57:30,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:57:30,669 INFO L82 PathProgramCache]: Analyzing trace with hash 1932635711, now seen corresponding path program 23 times [2021-07-09 17:57:30,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:57:30,669 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122470905] [2021-07-09 17:57:30,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:57:30,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:57:30,861 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 64 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:57:30,861 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:57:30,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122470905] [2021-07-09 17:57:30,861 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122470905] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:30,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082600082] [2021-07-09 17:57:30,861 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 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 [2021-07-09 17:57:30,890 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-07-09 17:57:30,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:57:30,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:57:30,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:57:31,300 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 64 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:57:31,301 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2082600082] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:31,302 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:57:31,302 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 41 [2021-07-09 17:57:31,302 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700927423] [2021-07-09 17:57:31,302 INFO L462 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-07-09 17:57:31,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:57:31,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-07-09 17:57:31,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=317, Invalid=1405, Unknown=0, NotChecked=0, Total=1722 [2021-07-09 17:57:31,303 INFO L87 Difference]: Start difference. First operand 345 states and 735 transitions. Second operand has 42 states, 42 states have (on average 2.142857142857143) internal successors, (90), 41 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:34,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:57:34,509 INFO L93 Difference]: Finished difference Result 1966 states and 3847 transitions. [2021-07-09 17:57:34,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2021-07-09 17:57:34,509 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.142857142857143) internal successors, (90), 41 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-07-09 17:57:34,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:57:34,513 INFO L225 Difference]: With dead ends: 1966 [2021-07-09 17:57:34,513 INFO L226 Difference]: Without dead ends: 1630 [2021-07-09 17:57:34,515 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8718 ImplicationChecksByTransitivity, 2913.9ms TimeCoverageRelationStatistics Valid=6597, Invalid=18525, Unknown=0, NotChecked=0, Total=25122 [2021-07-09 17:57:34,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1630 states. [2021-07-09 17:57:34,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1630 to 224. [2021-07-09 17:57:34,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 2.0403587443946187) internal successors, (455), 223 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:34,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 455 transitions. [2021-07-09 17:57:34,522 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 455 transitions. Word has length 48 [2021-07-09 17:57:34,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:57:34,522 INFO L482 AbstractCegarLoop]: Abstraction has 224 states and 455 transitions. [2021-07-09 17:57:34,522 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 42 states, 42 states have (on average 2.142857142857143) internal successors, (90), 41 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:34,522 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 455 transitions. [2021-07-09 17:57:34,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-07-09 17:57:34,523 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:57:34,523 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:57:34,727 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:57:34,727 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:57:34,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:57:34,727 INFO L82 PathProgramCache]: Analyzing trace with hash 1888843917, now seen corresponding path program 24 times [2021-07-09 17:57:34,727 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:57:34,727 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328264353] [2021-07-09 17:57:34,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:57:34,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:57:34,825 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 73 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:57:34,825 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:57:34,825 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328264353] [2021-07-09 17:57:34,826 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328264353] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:34,826 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1782428724] [2021-07-09 17:57:34,826 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 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 [2021-07-09 17:57:34,861 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-07-09 17:57:34,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:57:34,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:57:34,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:57:35,257 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 73 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:57:35,257 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1782428724] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:35,257 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:57:35,257 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 21] total 32 [2021-07-09 17:57:35,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504714411] [2021-07-09 17:57:35,257 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-07-09 17:57:35,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:57:35,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-07-09 17:57:35,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=829, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 17:57:35,258 INFO L87 Difference]: Start difference. First operand 224 states and 455 transitions. Second operand has 33 states, 33 states have (on average 2.606060606060606) internal successors, (86), 32 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:38,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:57:38,109 INFO L93 Difference]: Finished difference Result 1241 states and 2457 transitions. [2021-07-09 17:57:38,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2021-07-09 17:57:38,110 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.606060606060606) internal successors, (86), 32 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-07-09 17:57:38,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:57:38,113 INFO L225 Difference]: With dead ends: 1241 [2021-07-09 17:57:38,113 INFO L226 Difference]: Without dead ends: 1237 [2021-07-09 17:57:38,114 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8653 ImplicationChecksByTransitivity, 2691.0ms TimeCoverageRelationStatistics Valid=5342, Invalid=17308, Unknown=0, NotChecked=0, Total=22650 [2021-07-09 17:57:38,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1237 states. [2021-07-09 17:57:38,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1237 to 192. [2021-07-09 17:57:38,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 191 states have (on average 2.0523560209424083) internal successors, (392), 191 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:38,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 392 transitions. [2021-07-09 17:57:38,119 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 392 transitions. Word has length 48 [2021-07-09 17:57:38,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:57:38,120 INFO L482 AbstractCegarLoop]: Abstraction has 192 states and 392 transitions. [2021-07-09 17:57:38,120 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.606060606060606) internal successors, (86), 32 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:38,120 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 392 transitions. [2021-07-09 17:57:38,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-07-09 17:57:38,120 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:57:38,120 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:57:38,327 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-07-09 17:57:38,327 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:57:38,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:57:38,327 INFO L82 PathProgramCache]: Analyzing trace with hash 914329853, now seen corresponding path program 25 times [2021-07-09 17:57:38,327 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:57:38,327 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353578035] [2021-07-09 17:57:38,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:57:38,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:57:38,411 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:57:38,411 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:57:38,411 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353578035] [2021-07-09 17:57:38,411 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353578035] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:38,411 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005516035] [2021-07-09 17:57:38,411 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 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 [2021-07-09 17:57:38,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:57:38,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 39 conjunts are in the unsatisfiable core [2021-07-09 17:57:38,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:57:38,517 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:57:38,518 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2005516035] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:38,518 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:57:38,518 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-07-09 17:57:38,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084477441] [2021-07-09 17:57:38,518 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:57:38,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:57:38,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:57:38,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:57:38,519 INFO L87 Difference]: Start difference. First operand 192 states and 392 transitions. Second operand has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 12 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:38,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:57:38,629 INFO L93 Difference]: Finished difference Result 575 states and 1128 transitions. [2021-07-09 17:57:38,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:57:38,630 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 12 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-07-09 17:57:38,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:57:38,631 INFO L225 Difference]: With dead ends: 575 [2021-07-09 17:57:38,631 INFO L226 Difference]: Without dead ends: 506 [2021-07-09 17:57:38,631 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 58 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 60.4ms TimeCoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:57:38,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2021-07-09 17:57:38,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 385. [2021-07-09 17:57:38,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 385 states, 384 states have (on average 2.140625) internal successors, (822), 384 states have internal predecessors, (822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:38,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 822 transitions. [2021-07-09 17:57:38,636 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 822 transitions. Word has length 50 [2021-07-09 17:57:38,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:57:38,636 INFO L482 AbstractCegarLoop]: Abstraction has 385 states and 822 transitions. [2021-07-09 17:57:38,636 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 12 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:38,636 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 822 transitions. [2021-07-09 17:57:38,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-07-09 17:57:38,637 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:57:38,637 INFO L508 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:57:38,851 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-07-09 17:57:38,851 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:57:38,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:57:38,852 INFO L82 PathProgramCache]: Analyzing trace with hash 2068558075, now seen corresponding path program 26 times [2021-07-09 17:57:38,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:57:38,852 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227278038] [2021-07-09 17:57:38,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:57:38,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:57:39,087 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 81 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:57:39,087 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:57:39,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227278038] [2021-07-09 17:57:39,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227278038] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:39,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015254595] [2021-07-09 17:57:39,087 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 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 [2021-07-09 17:57:39,115 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:57:39,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:57:39,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:57:39,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:57:39,618 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 81 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:57:39,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1015254595] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:39,618 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:57:39,618 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23] total 45 [2021-07-09 17:57:39,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289912982] [2021-07-09 17:57:39,619 INFO L462 AbstractCegarLoop]: Interpolant automaton has 46 states [2021-07-09 17:57:39,619 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:57:39,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-07-09 17:57:39,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=376, Invalid=1694, Unknown=0, NotChecked=0, Total=2070 [2021-07-09 17:57:39,619 INFO L87 Difference]: Start difference. First operand 385 states and 822 transitions. Second operand has 46 states, 46 states have (on average 2.130434782608696) internal successors, (98), 45 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:43,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:57:43,760 INFO L93 Difference]: Finished difference Result 2331 states and 4569 transitions. [2021-07-09 17:57:43,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 144 states. [2021-07-09 17:57:43,760 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.130434782608696) internal successors, (98), 45 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-07-09 17:57:43,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:57:43,765 INFO L225 Difference]: With dead ends: 2331 [2021-07-09 17:57:43,765 INFO L226 Difference]: Without dead ends: 1923 [2021-07-09 17:57:43,766 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 184 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12499 ImplicationChecksByTransitivity, 3690.2ms TimeCoverageRelationStatistics Valid=9089, Invalid=25321, Unknown=0, NotChecked=0, Total=34410 [2021-07-09 17:57:43,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1923 states. [2021-07-09 17:57:43,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1923 to 246. [2021-07-09 17:57:43,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 245 states have (on average 2.0448979591836736) internal successors, (501), 245 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:43,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 501 transitions. [2021-07-09 17:57:43,774 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 501 transitions. Word has length 52 [2021-07-09 17:57:43,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:57:43,774 INFO L482 AbstractCegarLoop]: Abstraction has 246 states and 501 transitions. [2021-07-09 17:57:43,774 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 46 states, 46 states have (on average 2.130434782608696) internal successors, (98), 45 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:43,774 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 501 transitions. [2021-07-09 17:57:43,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-07-09 17:57:43,775 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:57:43,775 INFO L508 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:57:43,989 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-07-09 17:57:43,989 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:57:43,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:57:43,989 INFO L82 PathProgramCache]: Analyzing trace with hash -275960691, now seen corresponding path program 27 times [2021-07-09 17:57:43,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:57:43,989 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275312677] [2021-07-09 17:57:43,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:57:43,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:57:44,109 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 91 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:57:44,109 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:57:44,109 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275312677] [2021-07-09 17:57:44,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275312677] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:44,109 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [787155961] [2021-07-09 17:57:44,109 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 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 [2021-07-09 17:57:44,141 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-07-09 17:57:44,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:57:44,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:57:44,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:57:44,593 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 91 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:57:44,593 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [787155961] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:44,593 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:57:44,593 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 23] total 35 [2021-07-09 17:57:44,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959557536] [2021-07-09 17:57:44,594 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-07-09 17:57:44,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:57:44,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-07-09 17:57:44,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=266, Invalid=994, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 17:57:44,595 INFO L87 Difference]: Start difference. First operand 246 states and 501 transitions. Second operand has 36 states, 36 states have (on average 2.611111111111111) internal successors, (94), 35 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:48,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:57:48,195 INFO L93 Difference]: Finished difference Result 1485 states and 2945 transitions. [2021-07-09 17:57:48,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 145 states. [2021-07-09 17:57:48,196 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.611111111111111) internal successors, (94), 35 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-07-09 17:57:48,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:57:48,199 INFO L225 Difference]: With dead ends: 1485 [2021-07-09 17:57:48,199 INFO L226 Difference]: Without dead ends: 1481 [2021-07-09 17:57:48,201 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12396 ImplicationChecksByTransitivity, 3390.8ms TimeCoverageRelationStatistics Valid=7328, Invalid=23824, Unknown=0, NotChecked=0, Total=31152 [2021-07-09 17:57:48,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1481 states. [2021-07-09 17:57:48,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1481 to 210. [2021-07-09 17:57:48,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 209 states have (on average 2.0574162679425836) internal successors, (430), 209 states have internal predecessors, (430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:48,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 430 transitions. [2021-07-09 17:57:48,207 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 430 transitions. Word has length 52 [2021-07-09 17:57:48,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:57:48,207 INFO L482 AbstractCegarLoop]: Abstraction has 210 states and 430 transitions. [2021-07-09 17:57:48,207 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.611111111111111) internal successors, (94), 35 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:48,207 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 430 transitions. [2021-07-09 17:57:48,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-07-09 17:57:48,207 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:57:48,207 INFO L508 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:57:48,420 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:57:48,421 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:57:48,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:57:48,421 INFO L82 PathProgramCache]: Analyzing trace with hash -1608264519, now seen corresponding path program 28 times [2021-07-09 17:57:48,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:57:48,421 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694341919] [2021-07-09 17:57:48,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:57:48,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:57:48,543 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:57:48,543 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:57:48,543 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694341919] [2021-07-09 17:57:48,543 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694341919] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:48,543 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [404190492] [2021-07-09 17:57:48,543 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-09 17:57:48,577 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:57:48,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:57:48,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-09 17:57:48,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:57:48,646 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:57:48,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [404190492] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:48,647 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:57:48,647 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-07-09 17:57:48,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461811620] [2021-07-09 17:57:48,647 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:57:48,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:57:48,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:57:48,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:57:48,647 INFO L87 Difference]: Start difference. First operand 210 states and 430 transitions. Second operand has 13 states, 13 states have (on average 4.153846153846154) internal successors, (54), 13 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:48,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:57:48,781 INFO L93 Difference]: Finished difference Result 634 states and 1245 transitions. [2021-07-09 17:57:48,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:57:48,781 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.153846153846154) internal successors, (54), 13 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-07-09 17:57:48,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:57:48,783 INFO L225 Difference]: With dead ends: 634 [2021-07-09 17:57:48,783 INFO L226 Difference]: Without dead ends: 559 [2021-07-09 17:57:48,783 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 63 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 89.3ms TimeCoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:57:48,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 559 states. [2021-07-09 17:57:48,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 559 to 425. [2021-07-09 17:57:48,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 425 states, 424 states have (on average 2.143867924528302) internal successors, (909), 424 states have internal predecessors, (909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:48,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 425 states to 425 states and 909 transitions. [2021-07-09 17:57:48,789 INFO L78 Accepts]: Start accepts. Automaton has 425 states and 909 transitions. Word has length 54 [2021-07-09 17:57:48,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:57:48,790 INFO L482 AbstractCegarLoop]: Abstraction has 425 states and 909 transitions. [2021-07-09 17:57:48,790 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.153846153846154) internal successors, (54), 13 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:48,790 INFO L276 IsEmpty]: Start isEmpty. Operand 425 states and 909 transitions. [2021-07-09 17:57:48,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-07-09 17:57:48,790 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:57:48,790 INFO L508 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:57:48,994 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-07-09 17:57:48,994 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:57:48,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:57:48,994 INFO L82 PathProgramCache]: Analyzing trace with hash 1640220087, now seen corresponding path program 29 times [2021-07-09 17:57:48,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:57:48,994 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131974926] [2021-07-09 17:57:48,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:57:48,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:57:49,238 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 100 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:57:49,238 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:57:49,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131974926] [2021-07-09 17:57:49,238 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131974926] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:49,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636400074] [2021-07-09 17:57:49,238 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 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 [2021-07-09 17:57:49,269 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-07-09 17:57:49,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:57:49,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:57:49,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:57:49,817 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 100 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:57:49,817 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1636400074] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:49,817 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:57:49,817 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25] total 49 [2021-07-09 17:57:49,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475811568] [2021-07-09 17:57:49,818 INFO L462 AbstractCegarLoop]: Interpolant automaton has 50 states [2021-07-09 17:57:49,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:57:49,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-07-09 17:57:49,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=440, Invalid=2010, Unknown=0, NotChecked=0, Total=2450 [2021-07-09 17:57:49,818 INFO L87 Difference]: Start difference. First operand 425 states and 909 transitions. Second operand has 50 states, 50 states have (on average 2.12) internal successors, (106), 49 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:54,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:57:54,937 INFO L93 Difference]: Finished difference Result 2724 states and 5347 transitions. [2021-07-09 17:57:54,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 169 states. [2021-07-09 17:57:54,938 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.12) internal successors, (106), 49 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-07-09 17:57:54,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:57:54,943 INFO L225 Difference]: With dead ends: 2724 [2021-07-09 17:57:54,943 INFO L226 Difference]: Without dead ends: 2238 [2021-07-09 17:57:54,948 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 213 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17409 ImplicationChecksByTransitivity, 4583.6ms TimeCoverageRelationStatistics Valid=12230, Invalid=33780, Unknown=0, NotChecked=0, Total=46010 [2021-07-09 17:57:54,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2238 states. [2021-07-09 17:57:54,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2238 to 268. [2021-07-09 17:57:54,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 267 states have (on average 2.048689138576779) internal successors, (547), 267 states have internal predecessors, (547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:54,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 547 transitions. [2021-07-09 17:57:54,966 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 547 transitions. Word has length 56 [2021-07-09 17:57:54,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:57:54,966 INFO L482 AbstractCegarLoop]: Abstraction has 268 states and 547 transitions. [2021-07-09 17:57:54,966 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 50 states, 50 states have (on average 2.12) internal successors, (106), 49 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:54,967 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 547 transitions. [2021-07-09 17:57:54,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-07-09 17:57:54,967 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:57:54,967 INFO L508 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:57:55,181 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:57:55,181 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:57:55,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:57:55,181 INFO L82 PathProgramCache]: Analyzing trace with hash 205238669, now seen corresponding path program 30 times [2021-07-09 17:57:55,182 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:57:55,182 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081687411] [2021-07-09 17:57:55,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:57:55,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:57:55,299 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 111 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:57:55,299 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:57:55,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081687411] [2021-07-09 17:57:55,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081687411] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:55,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149944725] [2021-07-09 17:57:55,299 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:57:55,336 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2021-07-09 17:57:55,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:57:55,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:57:55,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:57:55,821 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 111 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:57:55,821 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1149944725] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:55,821 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:57:55,821 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 25] total 38 [2021-07-09 17:57:55,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26693596] [2021-07-09 17:57:55,822 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-09 17:57:55,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:57:55,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-09 17:57:55,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=308, Invalid=1174, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 17:57:55,822 INFO L87 Difference]: Start difference. First operand 268 states and 547 transitions. Second operand has 39 states, 39 states have (on average 2.6153846153846154) internal successors, (102), 38 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:58:00,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:58:00,242 INFO L93 Difference]: Finished difference Result 1751 states and 3477 transitions. [2021-07-09 17:58:00,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 170 states. [2021-07-09 17:58:00,243 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.6153846153846154) internal successors, (102), 38 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-07-09 17:58:00,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:58:00,246 INFO L225 Difference]: With dead ends: 1751 [2021-07-09 17:58:00,246 INFO L226 Difference]: Without dead ends: 1747 [2021-07-09 17:58:00,251 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 203 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17241 ImplicationChecksByTransitivity, 4121.5ms TimeCoverageRelationStatistics Valid=9824, Invalid=31996, Unknown=0, NotChecked=0, Total=41820 [2021-07-09 17:58:00,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1747 states. [2021-07-09 17:58:00,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1747 to 228. [2021-07-09 17:58:00,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 227 states have (on average 2.0616740088105727) internal successors, (468), 227 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:58:00,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 468 transitions. [2021-07-09 17:58:00,258 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 468 transitions. Word has length 56 [2021-07-09 17:58:00,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:58:00,258 INFO L482 AbstractCegarLoop]: Abstraction has 228 states and 468 transitions. [2021-07-09 17:58:00,258 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.6153846153846154) internal successors, (102), 38 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:58:00,258 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 468 transitions. [2021-07-09 17:58:00,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-07-09 17:58:00,258 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:58:00,258 INFO L508 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:58:00,472 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-07-09 17:58:00,472 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:58:00,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:58:00,473 INFO L82 PathProgramCache]: Analyzing trace with hash -924210571, now seen corresponding path program 31 times [2021-07-09 17:58:00,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:58:00,473 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130741952] [2021-07-09 17:58:00,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:58:00,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:58:00,604 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 0 proven. 242 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:58:00,604 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:58:00,604 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130741952] [2021-07-09 17:58:00,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130741952] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:58:00,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256746995] [2021-07-09 17:58:00,605 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 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 [2021-07-09 17:58:00,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:58:00,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-09 17:58:00,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:58:00,734 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 0 proven. 242 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:58:00,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [256746995] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:58:00,734 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:58:00,734 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-07-09 17:58:00,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150794570] [2021-07-09 17:58:00,734 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:58:00,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:58:00,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:58:00,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:58:00,735 INFO L87 Difference]: Start difference. First operand 228 states and 468 transitions. Second operand has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 14 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:58:00,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:58:00,882 INFO L93 Difference]: Finished difference Result 693 states and 1362 transitions. [2021-07-09 17:58:00,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:58:00,883 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 14 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-07-09 17:58:00,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:58:00,888 INFO L225 Difference]: With dead ends: 693 [2021-07-09 17:58:00,888 INFO L226 Difference]: Without dead ends: 612 [2021-07-09 17:58:00,888 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 68 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 91.6ms TimeCoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:58:00,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 612 states. [2021-07-09 17:58:00,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 612 to 465. [2021-07-09 17:58:00,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 465 states, 464 states have (on average 2.146551724137931) internal successors, (996), 464 states have internal predecessors, (996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:58:00,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 465 states to 465 states and 996 transitions. [2021-07-09 17:58:00,894 INFO L78 Accepts]: Start accepts. Automaton has 465 states and 996 transitions. Word has length 58 [2021-07-09 17:58:00,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:58:00,894 INFO L482 AbstractCegarLoop]: Abstraction has 465 states and 996 transitions. [2021-07-09 17:58:00,894 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 14 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:58:00,894 INFO L276 IsEmpty]: Start isEmpty. Operand 465 states and 996 transitions. [2021-07-09 17:58:00,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-07-09 17:58:00,895 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:58:00,895 INFO L508 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:58:01,108 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-07-09 17:58:01,109 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:58:01,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:58:01,109 INFO L82 PathProgramCache]: Analyzing trace with hash -418583437, now seen corresponding path program 32 times [2021-07-09 17:58:01,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:58:01,109 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402415516] [2021-07-09 17:58:01,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:58:01,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:58:01,400 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 121 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:58:01,401 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:58:01,401 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402415516] [2021-07-09 17:58:01,401 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402415516] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:58:01,401 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24706203] [2021-07-09 17:58:01,401 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-09 17:58:01,452 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:58:01,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:58:01,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 17:58:01,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:58:02,063 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 121 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:58:02,063 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [24706203] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:58:02,063 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:58:02,063 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27] total 53 [2021-07-09 17:58:02,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998120954] [2021-07-09 17:58:02,063 INFO L462 AbstractCegarLoop]: Interpolant automaton has 54 states [2021-07-09 17:58:02,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:58:02,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-07-09 17:58:02,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=509, Invalid=2353, Unknown=0, NotChecked=0, Total=2862 [2021-07-09 17:58:02,064 INFO L87 Difference]: Start difference. First operand 465 states and 996 transitions. Second operand has 54 states, 54 states have (on average 2.111111111111111) internal successors, (114), 53 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:58:08,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:58:08,448 INFO L93 Difference]: Finished difference Result 3145 states and 6181 transitions. [2021-07-09 17:58:08,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 196 states. [2021-07-09 17:58:08,448 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.111111111111111) internal successors, (114), 53 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-07-09 17:58:08,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:58:08,451 INFO L225 Difference]: With dead ends: 3145 [2021-07-09 17:58:08,451 INFO L226 Difference]: Without dead ends: 2575 [2021-07-09 17:58:08,453 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 244 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23656 ImplicationChecksByTransitivity, 5654.5ms TimeCoverageRelationStatistics Valid=16125, Invalid=44145, Unknown=0, NotChecked=0, Total=60270 [2021-07-09 17:58:08,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2575 states. [2021-07-09 17:58:08,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2575 to 290. [2021-07-09 17:58:08,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 289 states have (on average 2.0519031141868513) internal successors, (593), 289 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) [2021-07-09 17:58:08,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 593 transitions. [2021-07-09 17:58:08,463 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 593 transitions. Word has length 60 [2021-07-09 17:58:08,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:58:08,463 INFO L482 AbstractCegarLoop]: Abstraction has 290 states and 593 transitions. [2021-07-09 17:58:08,463 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 54 states, 54 states have (on average 2.111111111111111) internal successors, (114), 53 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:58:08,464 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 593 transitions. [2021-07-09 17:58:08,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-07-09 17:58:08,464 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:58:08,464 INFO L508 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:58:08,668 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-07-09 17:58:08,669 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:58:08,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:58:08,669 INFO L82 PathProgramCache]: Analyzing trace with hash 333465485, now seen corresponding path program 33 times [2021-07-09 17:58:08,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:58:08,669 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238593269] [2021-07-09 17:58:08,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:58:08,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:58:08,806 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 133 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:58:08,806 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:58:08,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238593269] [2021-07-09 17:58:08,806 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238593269] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:58:08,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [794101248] [2021-07-09 17:58:08,806 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 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 [2021-07-09 17:58:08,841 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-07-09 17:58:08,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:58:08,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 17:58:08,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:58:09,458 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 133 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:58:09,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [794101248] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:58:09,458 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:58:09,458 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 27] total 41 [2021-07-09 17:58:09,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459877754] [2021-07-09 17:58:09,458 INFO L462 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-07-09 17:58:09,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:58:09,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-07-09 17:58:09,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=1369, Unknown=0, NotChecked=0, Total=1722 [2021-07-09 17:58:09,459 INFO L87 Difference]: Start difference. First operand 290 states and 593 transitions. Second operand has 42 states, 42 states have (on average 2.619047619047619) internal successors, (110), 41 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:58:14,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:58:14,782 INFO L93 Difference]: Finished difference Result 2039 states and 4053 transitions. [2021-07-09 17:58:14,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 197 states. [2021-07-09 17:58:14,782 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.619047619047619) internal successors, (110), 41 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-07-09 17:58:14,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:58:14,785 INFO L225 Difference]: With dead ends: 2039 [2021-07-09 17:58:14,785 INFO L226 Difference]: Without dead ends: 2035 [2021-07-09 17:58:14,787 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 233 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23386 ImplicationChecksByTransitivity, 5060.8ms TimeCoverageRelationStatistics Valid=12911, Invalid=42079, Unknown=0, NotChecked=0, Total=54990 [2021-07-09 17:58:14,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2035 states. [2021-07-09 17:58:14,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2035 to 246. [2021-07-09 17:58:14,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 245 states have (on average 2.0653061224489795) internal successors, (506), 245 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) [2021-07-09 17:58:14,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 506 transitions. [2021-07-09 17:58:14,795 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 506 transitions. Word has length 60 [2021-07-09 17:58:14,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:58:14,795 INFO L482 AbstractCegarLoop]: Abstraction has 246 states and 506 transitions. [2021-07-09 17:58:14,795 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 42 states, 42 states have (on average 2.619047619047619) internal successors, (110), 41 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:58:14,795 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 506 transitions. [2021-07-09 17:58:14,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-07-09 17:58:14,795 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:58:14,796 INFO L508 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:58:14,996 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-07-09 17:58:14,996 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:58:14,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:58:14,997 INFO L82 PathProgramCache]: Analyzing trace with hash 545526321, now seen corresponding path program 34 times [2021-07-09 17:58:14,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:58:14,997 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239740592] [2021-07-09 17:58:14,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:58:15,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:58:15,109 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 0 proven. 288 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:58:15,109 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:58:15,109 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239740592] [2021-07-09 17:58:15,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1239740592] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:58:15,109 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786924367] [2021-07-09 17:58:15,109 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 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 [2021-07-09 17:58:15,145 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:58:15,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:58:15,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 51 conjunts are in the unsatisfiable core [2021-07-09 17:58:15,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:58:15,216 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 0 proven. 288 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:58:15,217 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1786924367] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:58:15,217 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:58:15,217 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2021-07-09 17:58:15,217 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253384089] [2021-07-09 17:58:15,218 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:58:15,218 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:58:15,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:58:15,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:58:15,218 INFO L87 Difference]: Start difference. First operand 246 states and 506 transitions. Second operand has 15 states, 15 states have (on average 4.133333333333334) internal successors, (62), 15 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:58:15,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:58:15,388 INFO L93 Difference]: Finished difference Result 752 states and 1479 transitions. [2021-07-09 17:58:15,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:58:15,389 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.133333333333334) internal successors, (62), 15 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-07-09 17:58:15,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:58:15,390 INFO L225 Difference]: With dead ends: 752 [2021-07-09 17:58:15,390 INFO L226 Difference]: Without dead ends: 665 [2021-07-09 17:58:15,390 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 73 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 88.3ms TimeCoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:58:15,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 665 states. [2021-07-09 17:58:15,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 665 to 505. [2021-07-09 17:58:15,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 505 states, 504 states have (on average 2.1488095238095237) internal successors, (1083), 504 states have internal predecessors, (1083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:58:15,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 1083 transitions. [2021-07-09 17:58:15,396 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 1083 transitions. Word has length 62 [2021-07-09 17:58:15,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:58:15,396 INFO L482 AbstractCegarLoop]: Abstraction has 505 states and 1083 transitions. [2021-07-09 17:58:15,396 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.133333333333334) internal successors, (62), 15 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:58:15,396 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 1083 transitions. [2021-07-09 17:58:15,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-07-09 17:58:15,397 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:58:15,397 INFO L508 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:58:15,608 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-07-09 17:58:15,609 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:58:15,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:58:15,609 INFO L82 PathProgramCache]: Analyzing trace with hash 387589423, now seen corresponding path program 35 times [2021-07-09 17:58:15,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:58:15,609 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434733109] [2021-07-09 17:58:15,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:58:15,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:58:15,934 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 144 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:58:15,934 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:58:15,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434733109] [2021-07-09 17:58:15,934 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434733109] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:58:15,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [946709855] [2021-07-09 17:58:15,934 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 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 [2021-07-09 17:58:15,975 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-07-09 17:58:15,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:58:15,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 17:58:15,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:58:16,665 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 144 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:58:16,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [946709855] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:58:16,666 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:58:16,666 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29] total 57 [2021-07-09 17:58:16,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366753145] [2021-07-09 17:58:16,666 INFO L462 AbstractCegarLoop]: Interpolant automaton has 58 states [2021-07-09 17:58:16,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:58:16,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2021-07-09 17:58:16,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=583, Invalid=2723, Unknown=0, NotChecked=0, Total=3306 [2021-07-09 17:58:16,667 INFO L87 Difference]: Start difference. First operand 505 states and 1083 transitions. Second operand has 58 states, 58 states have (on average 2.103448275862069) internal successors, (122), 57 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:58:24,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:58:24,169 INFO L93 Difference]: Finished difference Result 3594 states and 7071 transitions. [2021-07-09 17:58:24,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 225 states. [2021-07-09 17:58:24,169 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 2.103448275862069) internal successors, (122), 57 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-07-09 17:58:24,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:58:24,173 INFO L225 Difference]: With dead ends: 3594 [2021-07-09 17:58:24,173 INFO L226 Difference]: Without dead ends: 2934 [2021-07-09 17:58:24,176 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 277 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31467 ImplicationChecksByTransitivity, 6694.9ms TimeCoverageRelationStatistics Valid=20887, Invalid=56675, Unknown=0, NotChecked=0, Total=77562 [2021-07-09 17:58:24,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2934 states. [2021-07-09 17:58:24,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2934 to 312. [2021-07-09 17:58:24,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 311 states have (on average 2.054662379421222) internal successors, (639), 311 states have internal predecessors, (639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:58:24,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 639 transitions. [2021-07-09 17:58:24,188 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 639 transitions. Word has length 64 [2021-07-09 17:58:24,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:58:24,188 INFO L482 AbstractCegarLoop]: Abstraction has 312 states and 639 transitions. [2021-07-09 17:58:24,188 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 58 states, 58 states have (on average 2.103448275862069) internal successors, (122), 57 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:58:24,188 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 639 transitions. [2021-07-09 17:58:24,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-07-09 17:58:24,189 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:58:24,189 INFO L508 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:58:24,397 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-07-09 17:58:24,397 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:58:24,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:58:24,398 INFO L82 PathProgramCache]: Analyzing trace with hash -1658179955, now seen corresponding path program 36 times [2021-07-09 17:58:24,398 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:58:24,398 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595865119] [2021-07-09 17:58:24,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:58:24,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:58:24,556 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 157 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:58:24,556 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:58:24,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595865119] [2021-07-09 17:58:24,556 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595865119] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:58:24,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635455888] [2021-07-09 17:58:24,556 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 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 [2021-07-09 17:58:24,591 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2021-07-09 17:58:24,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:58:24,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 17:58:24,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:58:25,268 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 157 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:58:25,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [635455888] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:58:25,268 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:58:25,268 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 29] total 44 [2021-07-09 17:58:25,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123911079] [2021-07-09 17:58:25,269 INFO L462 AbstractCegarLoop]: Interpolant automaton has 45 states [2021-07-09 17:58:25,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:58:25,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-07-09 17:58:25,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=401, Invalid=1579, Unknown=0, NotChecked=0, Total=1980 [2021-07-09 17:58:25,269 INFO L87 Difference]: Start difference. First operand 312 states and 639 transitions. Second operand has 45 states, 45 states have (on average 2.6222222222222222) internal successors, (118), 44 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:58:31,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:58:31,693 INFO L93 Difference]: Finished difference Result 2349 states and 4673 transitions. [2021-07-09 17:58:31,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 226 states. [2021-07-09 17:58:31,694 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.6222222222222222) internal successors, (118), 44 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-07-09 17:58:31,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:58:31,697 INFO L225 Difference]: With dead ends: 2349 [2021-07-09 17:58:31,697 INFO L226 Difference]: Without dead ends: 2345 [2021-07-09 17:58:31,700 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 265 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31046 ImplicationChecksByTransitivity, 6072.6ms TimeCoverageRelationStatistics Valid=16676, Invalid=54346, Unknown=0, NotChecked=0, Total=71022 [2021-07-09 17:58:31,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2345 states. [2021-07-09 17:58:31,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2345 to 264. [2021-07-09 17:58:31,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 263 states have (on average 2.068441064638783) internal successors, (544), 263 states have internal predecessors, (544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:58:31,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 544 transitions. [2021-07-09 17:58:31,709 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 544 transitions. Word has length 64 [2021-07-09 17:58:31,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:58:31,709 INFO L482 AbstractCegarLoop]: Abstraction has 264 states and 544 transitions. [2021-07-09 17:58:31,709 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 45 states, 45 states have (on average 2.6222222222222222) internal successors, (118), 44 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:58:31,709 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 544 transitions. [2021-07-09 17:58:31,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-07-09 17:58:31,710 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:58:31,710 INFO L508 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:58:31,925 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-07-09 17:58:31,925 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:58:31,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:58:31,925 INFO L82 PathProgramCache]: Analyzing trace with hash -2111435795, now seen corresponding path program 37 times [2021-07-09 17:58:31,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:58:31,925 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964750667] [2021-07-09 17:58:31,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:58:31,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:58:32,068 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 0 proven. 338 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:58:32,068 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:58:32,068 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964750667] [2021-07-09 17:58:32,068 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964750667] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:58:32,068 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1087429811] [2021-07-09 17:58:32,068 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 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 [2021-07-09 17:58:32,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:58:32,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 55 conjunts are in the unsatisfiable core [2021-07-09 17:58:32,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:58:32,201 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 0 proven. 338 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:58:32,201 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1087429811] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:58:32,201 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:58:32,201 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2021-07-09 17:58:32,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133780969] [2021-07-09 17:58:32,202 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:58:32,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:58:32,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:58:32,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:58:32,202 INFO L87 Difference]: Start difference. First operand 264 states and 544 transitions. Second operand has 16 states, 16 states have (on average 4.125) internal successors, (66), 16 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:58:32,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:58:32,419 INFO L93 Difference]: Finished difference Result 811 states and 1596 transitions. [2021-07-09 17:58:32,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:58:32,420 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.125) internal successors, (66), 16 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-07-09 17:58:32,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:58:32,421 INFO L225 Difference]: With dead ends: 811 [2021-07-09 17:58:32,421 INFO L226 Difference]: Without dead ends: 718 [2021-07-09 17:58:32,421 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 78 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 103.3ms TimeCoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:58:32,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 718 states. [2021-07-09 17:58:32,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 718 to 545. [2021-07-09 17:58:32,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 545 states, 544 states have (on average 2.150735294117647) internal successors, (1170), 544 states have internal predecessors, (1170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:58:32,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 545 states to 545 states and 1170 transitions. [2021-07-09 17:58:32,427 INFO L78 Accepts]: Start accepts. Automaton has 545 states and 1170 transitions. Word has length 66 [2021-07-09 17:58:32,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:58:32,427 INFO L482 AbstractCegarLoop]: Abstraction has 545 states and 1170 transitions. [2021-07-09 17:58:32,427 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.125) internal successors, (66), 16 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:58:32,427 INFO L276 IsEmpty]: Start isEmpty. Operand 545 states and 1170 transitions. [2021-07-09 17:58:32,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-07-09 17:58:32,428 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:58:32,428 INFO L508 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:58:32,635 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-07-09 17:58:32,635 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:58:32,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:58:32,636 INFO L82 PathProgramCache]: Analyzing trace with hash 1230925803, now seen corresponding path program 38 times [2021-07-09 17:58:32,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:58:32,636 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582678611] [2021-07-09 17:58:32,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:58:32,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:58:33,006 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 169 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:58:33,006 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:58:33,006 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582678611] [2021-07-09 17:58:33,006 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1582678611] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:58:33,006 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1230272569] [2021-07-09 17:58:33,006 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 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:58:33,041 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:58:33,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:58:33,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:58:33,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:58:33,888 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 169 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:58:33,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1230272569] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:58:33,888 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:58:33,888 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31] total 61 [2021-07-09 17:58:33,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790328911] [2021-07-09 17:58:33,888 INFO L462 AbstractCegarLoop]: Interpolant automaton has 62 states [2021-07-09 17:58:33,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:58:33,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2021-07-09 17:58:33,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=662, Invalid=3120, Unknown=0, NotChecked=0, Total=3782 [2021-07-09 17:58:33,889 INFO L87 Difference]: Start difference. First operand 545 states and 1170 transitions. Second operand has 62 states, 62 states have (on average 2.096774193548387) internal successors, (130), 61 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:58:43,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:58:43,024 INFO L93 Difference]: Finished difference Result 4071 states and 8017 transitions. [2021-07-09 17:58:43,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 256 states. [2021-07-09 17:58:43,025 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 2.096774193548387) internal successors, (130), 61 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-07-09 17:58:43,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:58:43,030 INFO L225 Difference]: With dead ends: 4071 [2021-07-09 17:58:43,030 INFO L226 Difference]: Without dead ends: 3315 [2021-07-09 17:58:43,033 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 351 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 312 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41086 ImplicationChecksByTransitivity, 8106.5ms TimeCoverageRelationStatistics Valid=26637, Invalid=71645, Unknown=0, NotChecked=0, Total=98282 [2021-07-09 17:58:43,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3315 states. [2021-07-09 17:58:43,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3315 to 334. [2021-07-09 17:58:43,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 334 states, 333 states have (on average 2.057057057057057) internal successors, (685), 333 states have internal predecessors, (685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:58:43,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 685 transitions. [2021-07-09 17:58:43,048 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 685 transitions. Word has length 68 [2021-07-09 17:58:43,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:58:43,048 INFO L482 AbstractCegarLoop]: Abstraction has 334 states and 685 transitions. [2021-07-09 17:58:43,048 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 62 states, 62 states have (on average 2.096774193548387) internal successors, (130), 61 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:58:43,048 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 685 transitions. [2021-07-09 17:58:43,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-07-09 17:58:43,048 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:58:43,049 INFO L508 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:58:43,260 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:58:43,261 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:58:43,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:58:43,261 INFO L82 PathProgramCache]: Analyzing trace with hash -868702579, now seen corresponding path program 39 times [2021-07-09 17:58:43,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:58:43,261 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251936104] [2021-07-09 17:58:43,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:58:43,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:58:43,420 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 183 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:58:43,421 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:58:43,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251936104] [2021-07-09 17:58:43,421 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251936104] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:58:43,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1699434063] [2021-07-09 17:58:43,421 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-09 17:58:43,460 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2021-07-09 17:58:43,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:58:43,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:58:43,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:58:44,193 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 183 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:58:44,193 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1699434063] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:58:44,193 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:58:44,193 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 31] total 47 [2021-07-09 17:58:44,193 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598540298] [2021-07-09 17:58:44,193 INFO L462 AbstractCegarLoop]: Interpolant automaton has 48 states [2021-07-09 17:58:44,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:58:44,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-07-09 17:58:44,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=452, Invalid=1804, Unknown=0, NotChecked=0, Total=2256 [2021-07-09 17:58:44,194 INFO L87 Difference]: Start difference. First operand 334 states and 685 transitions. Second operand has 48 states, 48 states have (on average 2.625) internal successors, (126), 47 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:58:51,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:58:51,695 INFO L93 Difference]: Finished difference Result 2681 states and 5337 transitions. [2021-07-09 17:58:51,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 257 states. [2021-07-09 17:58:51,695 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.625) internal successors, (126), 47 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-07-09 17:58:51,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:58:51,698 INFO L225 Difference]: With dead ends: 2681 [2021-07-09 17:58:51,698 INFO L226 Difference]: Without dead ends: 2677 [2021-07-09 17:58:51,702 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 351 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 299 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40452 ImplicationChecksByTransitivity, 7053.6ms TimeCoverageRelationStatistics Valid=21212, Invalid=69088, Unknown=0, NotChecked=0, Total=90300 [2021-07-09 17:58:51,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2677 states. [2021-07-09 17:58:51,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2677 to 282. [2021-07-09 17:58:51,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 281 states have (on average 2.0711743772241995) internal successors, (582), 281 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:58:51,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 582 transitions. [2021-07-09 17:58:51,713 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 582 transitions. Word has length 68 [2021-07-09 17:58:51,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:58:51,713 INFO L482 AbstractCegarLoop]: Abstraction has 282 states and 582 transitions. [2021-07-09 17:58:51,713 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 48 states, 48 states have (on average 2.625) internal successors, (126), 47 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:58:51,713 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 582 transitions. [2021-07-09 17:58:51,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-07-09 17:58:51,713 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:58:51,713 INFO L508 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:58:51,928 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:58:51,929 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:58:51,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:58:51,929 INFO L82 PathProgramCache]: Analyzing trace with hash 880973737, now seen corresponding path program 40 times [2021-07-09 17:58:51,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:58:51,929 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800902863] [2021-07-09 17:58:51,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:58:51,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:58:52,072 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:58:52,073 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:58:52,073 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800902863] [2021-07-09 17:58:52,073 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800902863] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:58:52,073 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [806798739] [2021-07-09 17:58:52,073 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:58:52,130 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:58:52,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:58:52,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 59 conjunts are in the unsatisfiable core [2021-07-09 17:58:52,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:58:52,232 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:58:52,233 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [806798739] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:58:52,233 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:58:52,233 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2021-07-09 17:58:52,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441790217] [2021-07-09 17:58:52,233 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:58:52,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:58:52,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:58:52,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:58:52,234 INFO L87 Difference]: Start difference. First operand 282 states and 582 transitions. Second operand has 17 states, 17 states have (on average 4.117647058823529) internal successors, (70), 17 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:58:52,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:58:52,460 INFO L93 Difference]: Finished difference Result 870 states and 1713 transitions. [2021-07-09 17:58:52,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:58:52,460 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.117647058823529) internal successors, (70), 17 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-07-09 17:58:52,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:58:52,462 INFO L225 Difference]: With dead ends: 870 [2021-07-09 17:58:52,462 INFO L226 Difference]: Without dead ends: 771 [2021-07-09 17:58:52,462 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 83 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 116.9ms TimeCoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:58:52,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 771 states. [2021-07-09 17:58:52,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 771 to 585. [2021-07-09 17:58:52,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 585 states, 584 states have (on average 2.1523972602739727) internal successors, (1257), 584 states have internal predecessors, (1257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:58:52,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 585 states to 585 states and 1257 transitions. [2021-07-09 17:58:52,469 INFO L78 Accepts]: Start accepts. Automaton has 585 states and 1257 transitions. Word has length 70 [2021-07-09 17:58:52,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:58:52,470 INFO L482 AbstractCegarLoop]: Abstraction has 585 states and 1257 transitions. [2021-07-09 17:58:52,470 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.117647058823529) internal successors, (70), 17 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:58:52,470 INFO L276 IsEmpty]: Start isEmpty. Operand 585 states and 1257 transitions. [2021-07-09 17:58:52,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-07-09 17:58:52,471 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:58:52,471 INFO L508 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:58:52,679 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-07-09 17:58:52,680 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:58:52,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:58:52,680 INFO L82 PathProgramCache]: Analyzing trace with hash 550292647, now seen corresponding path program 41 times [2021-07-09 17:58:52,680 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:58:52,680 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020561162] [2021-07-09 17:58:52,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:58:52,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:58:53,071 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 196 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:58:53,071 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:58:53,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020561162] [2021-07-09 17:58:53,071 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020561162] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:58:53,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546165170] [2021-07-09 17:58:53,071 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-09 17:58:53,109 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2021-07-09 17:58:53,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:58:53,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:58:53,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:58:53,961 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 196 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:58:53,961 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [546165170] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:58:53,961 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:58:53,961 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33] total 65 [2021-07-09 17:58:53,961 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81250929] [2021-07-09 17:58:53,961 INFO L462 AbstractCegarLoop]: Interpolant automaton has 66 states [2021-07-09 17:58:53,961 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:58:53,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-07-09 17:58:53,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=746, Invalid=3544, Unknown=0, NotChecked=0, Total=4290 [2021-07-09 17:58:53,962 INFO L87 Difference]: Start difference. First operand 585 states and 1257 transitions. Second operand has 66 states, 66 states have (on average 2.090909090909091) internal successors, (138), 65 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:59:04,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:59:04,780 INFO L93 Difference]: Finished difference Result 4576 states and 9019 transitions. [2021-07-09 17:59:04,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 289 states. [2021-07-09 17:59:04,780 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 2.090909090909091) internal successors, (138), 65 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-07-09 17:59:04,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:59:04,785 INFO L225 Difference]: With dead ends: 4576 [2021-07-09 17:59:04,785 INFO L226 Difference]: Without dead ends: 3718 [2021-07-09 17:59:04,790 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 390 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 349 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52776 ImplicationChecksByTransitivity, 9488.6ms TimeCoverageRelationStatistics Valid=33504, Invalid=89346, Unknown=0, NotChecked=0, Total=122850 [2021-07-09 17:59:04,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3718 states. [2021-07-09 17:59:04,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3718 to 356. [2021-07-09 17:59:04,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 356 states, 355 states have (on average 2.0591549295774647) internal successors, (731), 355 states have internal predecessors, (731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:59:04,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 731 transitions. [2021-07-09 17:59:04,804 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 731 transitions. Word has length 72 [2021-07-09 17:59:04,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:59:04,804 INFO L482 AbstractCegarLoop]: Abstraction has 356 states and 731 transitions. [2021-07-09 17:59:04,805 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 66 states, 66 states have (on average 2.090909090909091) internal successors, (138), 65 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:59:04,805 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 731 transitions. [2021-07-09 17:59:04,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-07-09 17:59:04,805 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:59:04,805 INFO L508 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:59:05,016 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:59:05,017 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:59:05,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:59:05,017 INFO L82 PathProgramCache]: Analyzing trace with hash -1768231027, now seen corresponding path program 42 times [2021-07-09 17:59:05,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:59:05,017 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848634191] [2021-07-09 17:59:05,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:59:05,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:59:05,207 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 211 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:59:05,207 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:59:05,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848634191] [2021-07-09 17:59:05,207 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848634191] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:59:05,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1265041188] [2021-07-09 17:59:05,207 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 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 [2021-07-09 17:59:05,246 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2021-07-09 17:59:05,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:59:05,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:59:05,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:59:05,998 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 211 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:59:05,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1265041188] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:59:05,998 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:59:05,998 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 33] total 50 [2021-07-09 17:59:05,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370770467] [2021-07-09 17:59:05,998 INFO L462 AbstractCegarLoop]: Interpolant automaton has 51 states [2021-07-09 17:59:05,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:59:05,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-07-09 17:59:05,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=506, Invalid=2044, Unknown=0, NotChecked=0, Total=2550 [2021-07-09 17:59:05,999 INFO L87 Difference]: Start difference. First operand 356 states and 731 transitions. Second operand has 51 states, 51 states have (on average 2.627450980392157) internal successors, (134), 50 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:59:14,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:59:14,892 INFO L93 Difference]: Finished difference Result 3035 states and 6045 transitions. [2021-07-09 17:59:14,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 290 states. [2021-07-09 17:59:14,892 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.627450980392157) internal successors, (134), 50 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-07-09 17:59:14,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:59:14,895 INFO L225 Difference]: With dead ends: 3035 [2021-07-09 17:59:14,895 INFO L226 Difference]: Without dead ends: 3031 [2021-07-09 17:59:14,899 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 390 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 335 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51852 ImplicationChecksByTransitivity, 8336.3ms TimeCoverageRelationStatistics Valid=26618, Invalid=86614, Unknown=0, NotChecked=0, Total=113232 [2021-07-09 17:59:14,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3031 states. [2021-07-09 17:59:14,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3031 to 300. [2021-07-09 17:59:14,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 299 states have (on average 2.0735785953177257) internal successors, (620), 299 states have internal predecessors, (620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:59:14,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 620 transitions. [2021-07-09 17:59:14,910 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 620 transitions. Word has length 72 [2021-07-09 17:59:14,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:59:14,910 INFO L482 AbstractCegarLoop]: Abstraction has 300 states and 620 transitions. [2021-07-09 17:59:14,910 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 51 states, 51 states have (on average 2.627450980392157) internal successors, (134), 50 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:59:14,910 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 620 transitions. [2021-07-09 17:59:14,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-07-09 17:59:14,911 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:59:14,911 INFO L508 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:59:15,116 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:59:15,116 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:59:15,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:59:15,117 INFO L82 PathProgramCache]: Analyzing trace with hash -372460187, now seen corresponding path program 43 times [2021-07-09 17:59:15,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:59:15,117 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453897081] [2021-07-09 17:59:15,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:59:15,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:59:15,284 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 0 proven. 450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:59:15,284 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:59:15,284 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453897081] [2021-07-09 17:59:15,284 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453897081] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:59:15,284 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [705127798] [2021-07-09 17:59:15,284 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 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 [2021-07-09 17:59:15,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:59:15,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 63 conjunts are in the unsatisfiable core [2021-07-09 17:59:15,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:59:15,432 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 0 proven. 450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:59:15,432 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [705127798] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:59:15,432 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:59:15,432 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2021-07-09 17:59:15,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833407572] [2021-07-09 17:59:15,432 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:59:15,432 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:59:15,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:59:15,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:59:15,433 INFO L87 Difference]: Start difference. First operand 300 states and 620 transitions. Second operand has 18 states, 18 states have (on average 4.111111111111111) internal successors, (74), 18 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:59:15,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:59:15,701 INFO L93 Difference]: Finished difference Result 929 states and 1830 transitions. [2021-07-09 17:59:15,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:59:15,702 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.111111111111111) internal successors, (74), 18 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2021-07-09 17:59:15,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:59:15,703 INFO L225 Difference]: With dead ends: 929 [2021-07-09 17:59:15,703 INFO L226 Difference]: Without dead ends: 824 [2021-07-09 17:59:15,703 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 88 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 136.3ms TimeCoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:59:15,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 824 states. [2021-07-09 17:59:15,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 824 to 625. [2021-07-09 17:59:15,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 625 states, 624 states have (on average 2.1538461538461537) internal successors, (1344), 624 states have internal predecessors, (1344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:59:15,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 625 states to 625 states and 1344 transitions. [2021-07-09 17:59:15,710 INFO L78 Accepts]: Start accepts. Automaton has 625 states and 1344 transitions. Word has length 74 [2021-07-09 17:59:15,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:59:15,710 INFO L482 AbstractCegarLoop]: Abstraction has 625 states and 1344 transitions. [2021-07-09 17:59:15,710 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 4.111111111111111) internal successors, (74), 18 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:59:15,710 INFO L276 IsEmpty]: Start isEmpty. Operand 625 states and 1344 transitions. [2021-07-09 17:59:15,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-07-09 17:59:15,710 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:59:15,711 INFO L508 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:59:15,922 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-07-09 17:59:15,922 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:59:15,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:59:15,923 INFO L82 PathProgramCache]: Analyzing trace with hash -1948763293, now seen corresponding path program 44 times [2021-07-09 17:59:15,923 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:59:15,923 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702396744] [2021-07-09 17:59:15,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:59:15,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:59:16,357 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 225 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:59:16,357 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:59:16,357 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702396744] [2021-07-09 17:59:16,357 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702396744] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:59:16,357 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992090931] [2021-07-09 17:59:16,357 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 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 [2021-07-09 17:59:16,391 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:59:16,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:59:16,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 35 conjunts are in the unsatisfiable core [2021-07-09 17:59:16,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:59:17,395 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 225 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:59:17,395 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [992090931] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:59:17,396 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:59:17,396 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35] total 69 [2021-07-09 17:59:17,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460598388] [2021-07-09 17:59:17,396 INFO L462 AbstractCegarLoop]: Interpolant automaton has 70 states [2021-07-09 17:59:17,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:59:17,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2021-07-09 17:59:17,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=835, Invalid=3995, Unknown=0, NotChecked=0, Total=4830 [2021-07-09 17:59:17,397 INFO L87 Difference]: Start difference. First operand 625 states and 1344 transitions. Second operand has 70 states, 70 states have (on average 2.085714285714286) internal successors, (146), 69 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:59:30,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:59:30,462 INFO L93 Difference]: Finished difference Result 5109 states and 10077 transitions. [2021-07-09 17:59:30,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 324 states. [2021-07-09 17:59:30,462 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 2.085714285714286) internal successors, (146), 69 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-07-09 17:59:30,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:59:30,466 INFO L225 Difference]: With dead ends: 5109 [2021-07-09 17:59:30,466 INFO L226 Difference]: Without dead ends: 4143 [2021-07-09 17:59:30,471 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 431 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 388 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66817 ImplicationChecksByTransitivity, 11404.9ms TimeCoverageRelationStatistics Valid=41625, Invalid=110085, Unknown=0, NotChecked=0, Total=151710 [2021-07-09 17:59:30,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4143 states. [2021-07-09 17:59:30,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4143 to 378. [2021-07-09 17:59:30,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 378 states, 377 states have (on average 2.061007957559682) internal successors, (777), 377 states have internal predecessors, (777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:59:30,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 777 transitions. [2021-07-09 17:59:30,499 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 777 transitions. Word has length 76 [2021-07-09 17:59:30,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:59:30,499 INFO L482 AbstractCegarLoop]: Abstraction has 378 states and 777 transitions. [2021-07-09 17:59:30,499 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 70 states, 70 states have (on average 2.085714285714286) internal successors, (146), 69 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:59:30,499 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 777 transitions. [2021-07-09 17:59:30,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-07-09 17:59:30,500 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:59:30,500 INFO L508 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:59:30,713 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-07-09 17:59:30,713 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:59:30,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:59:30,728 INFO L82 PathProgramCache]: Analyzing trace with hash 122702221, now seen corresponding path program 45 times [2021-07-09 17:59:30,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:59:30,729 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206746276] [2021-07-09 17:59:30,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:59:30,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:59:30,977 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 241 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:59:30,977 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:59:30,977 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206746276] [2021-07-09 17:59:30,977 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206746276] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:59:30,977 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119291615] [2021-07-09 17:59:30,977 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-09 17:59:31,021 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2021-07-09 17:59:31,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:59:31,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 35 conjunts are in the unsatisfiable core [2021-07-09 17:59:31,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:59:32,040 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 241 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:59:32,040 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1119291615] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:59:32,040 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:59:32,040 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 35] total 53 [2021-07-09 17:59:32,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233812699] [2021-07-09 17:59:32,040 INFO L462 AbstractCegarLoop]: Interpolant automaton has 54 states [2021-07-09 17:59:32,040 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:59:32,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-07-09 17:59:32,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=2299, Unknown=0, NotChecked=0, Total=2862 [2021-07-09 17:59:32,041 INFO L87 Difference]: Start difference. First operand 378 states and 777 transitions. Second operand has 54 states, 54 states have (on average 2.6296296296296298) internal successors, (142), 53 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:59:42,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:59:42,795 INFO L93 Difference]: Finished difference Result 3411 states and 6797 transitions. [2021-07-09 17:59:42,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 325 states. [2021-07-09 17:59:42,795 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.6296296296296298) internal successors, (142), 53 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-07-09 17:59:42,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:59:42,798 INFO L225 Difference]: With dead ends: 3411 [2021-07-09 17:59:42,799 INFO L226 Difference]: Without dead ends: 3407 [2021-07-09 17:59:42,804 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 431 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 373 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65510 ImplicationChecksByTransitivity, 10157.2ms TimeCoverageRelationStatistics Valid=32999, Invalid=107251, Unknown=0, NotChecked=0, Total=140250 [2021-07-09 17:59:42,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3407 states. [2021-07-09 17:59:42,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3407 to 318. [2021-07-09 17:59:42,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 317 states have (on average 2.0757097791798107) internal successors, (658), 317 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:59:42,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 658 transitions. [2021-07-09 17:59:42,815 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 658 transitions. Word has length 76 [2021-07-09 17:59:42,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:59:42,815 INFO L482 AbstractCegarLoop]: Abstraction has 318 states and 658 transitions. [2021-07-09 17:59:42,815 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 54 states, 54 states have (on average 2.6296296296296298) internal successors, (142), 53 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:59:42,815 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 658 transitions. [2021-07-09 17:59:42,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-07-09 17:59:42,816 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:59:42,816 INFO L508 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:59:43,016 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-07-09 17:59:43,017 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:59:43,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:59:43,017 INFO L82 PathProgramCache]: Analyzing trace with hash -1078500063, now seen corresponding path program 46 times [2021-07-09 17:59:43,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:59:43,017 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633363270] [2021-07-09 17:59:43,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:59:43,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:59:43,202 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 0 proven. 512 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:59:43,202 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:59:43,202 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633363270] [2021-07-09 17:59:43,202 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633363270] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:59:43,202 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1519424079] [2021-07-09 17:59:43,202 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 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 [2021-07-09 17:59:43,239 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:59:43,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:59:43,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 67 conjunts are in the unsatisfiable core [2021-07-09 17:59:43,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:59:43,364 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 0 proven. 512 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:59:43,365 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1519424079] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:59:43,365 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:59:43,365 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2021-07-09 17:59:43,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115026789] [2021-07-09 17:59:43,365 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:59:43,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:59:43,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:59:43,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:59:43,366 INFO L87 Difference]: Start difference. First operand 318 states and 658 transitions. Second operand has 19 states, 19 states have (on average 4.105263157894737) internal successors, (78), 19 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:59:43,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:59:43,670 INFO L93 Difference]: Finished difference Result 988 states and 1947 transitions. [2021-07-09 17:59:43,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:59:43,671 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.105263157894737) internal successors, (78), 19 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 78 [2021-07-09 17:59:43,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:59:43,672 INFO L225 Difference]: With dead ends: 988 [2021-07-09 17:59:43,672 INFO L226 Difference]: Without dead ends: 877 [2021-07-09 17:59:43,672 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 93 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 146.4ms TimeCoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:59:43,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 877 states. [2021-07-09 17:59:43,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 877 to 665. [2021-07-09 17:59:43,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 665 states, 664 states have (on average 2.1551204819277108) internal successors, (1431), 664 states have internal predecessors, (1431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:59:43,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 665 states to 665 states and 1431 transitions. [2021-07-09 17:59:43,679 INFO L78 Accepts]: Start accepts. Automaton has 665 states and 1431 transitions. Word has length 78 [2021-07-09 17:59:43,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:59:43,679 INFO L482 AbstractCegarLoop]: Abstraction has 665 states and 1431 transitions. [2021-07-09 17:59:43,679 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 4.105263157894737) internal successors, (78), 19 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:59:43,679 INFO L276 IsEmpty]: Start isEmpty. Operand 665 states and 1431 transitions. [2021-07-09 17:59:43,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-07-09 17:59:43,680 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:59:43,680 INFO L508 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:59:43,880 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:59:43,880 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:59:43,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:59:43,880 INFO L82 PathProgramCache]: Analyzing trace with hash -999048161, now seen corresponding path program 47 times [2021-07-09 17:59:43,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:59:43,881 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816918442] [2021-07-09 17:59:43,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:59:43,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:59:44,353 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 256 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:59:44,353 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:59:44,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816918442] [2021-07-09 17:59:44,353 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816918442] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:59:44,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1132162857] [2021-07-09 17:59:44,354 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 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 [2021-07-09 17:59:44,402 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2021-07-09 17:59:44,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:59:44,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 37 conjunts are in the unsatisfiable core [2021-07-09 17:59:44,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:59:45,485 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 256 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:59:45,485 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1132162857] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:59:45,485 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:59:45,485 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 37] total 73 [2021-07-09 17:59:45,485 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373073347] [2021-07-09 17:59:45,485 INFO L462 AbstractCegarLoop]: Interpolant automaton has 74 states [2021-07-09 17:59:45,485 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:59:45,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2021-07-09 17:59:45,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=929, Invalid=4473, Unknown=0, NotChecked=0, Total=5402 [2021-07-09 17:59:45,486 INFO L87 Difference]: Start difference. First operand 665 states and 1431 transitions. Second operand has 74 states, 74 states have (on average 2.081081081081081) internal successors, (154), 73 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:59:53,173 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2021-07-09 18:00:01,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:00:01,011 INFO L93 Difference]: Finished difference Result 5670 states and 11191 transitions. [2021-07-09 18:00:01,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 361 states. [2021-07-09 18:00:01,012 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 2.081081081081081) internal successors, (154), 73 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-07-09 18:00:01,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:00:01,016 INFO L225 Difference]: With dead ends: 5670 [2021-07-09 18:00:01,016 INFO L226 Difference]: Without dead ends: 4590 [2021-07-09 18:00:01,023 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 474 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 429 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83508 ImplicationChecksByTransitivity, 13349.5ms TimeCoverageRelationStatistics Valid=51145, Invalid=134185, Unknown=0, NotChecked=0, Total=185330 [2021-07-09 18:00:01,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4590 states. [2021-07-09 18:00:01,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4590 to 400. [2021-07-09 18:00:01,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 399 states have (on average 2.06265664160401) internal successors, (823), 399 states have internal predecessors, (823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:00:01,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 823 transitions. [2021-07-09 18:00:01,040 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 823 transitions. Word has length 80 [2021-07-09 18:00:01,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:00:01,040 INFO L482 AbstractCegarLoop]: Abstraction has 400 states and 823 transitions. [2021-07-09 18:00:01,040 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 74 states, 74 states have (on average 2.081081081081081) internal successors, (154), 73 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:00:01,040 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 823 transitions. [2021-07-09 18:00:01,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-07-09 18:00:01,040 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:00:01,041 INFO L508 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:00:01,256 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-07-09 18:00:01,256 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:00:01,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:00:01,256 INFO L82 PathProgramCache]: Analyzing trace with hash -2100824947, now seen corresponding path program 48 times [2021-07-09 18:00:01,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:00:01,257 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112559356] [2021-07-09 18:00:01,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:00:01,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:00:01,475 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 273 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:00:01,475 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:00:01,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112559356] [2021-07-09 18:00:01,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112559356] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:00:01,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276064266] [2021-07-09 18:00:01,475 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 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 [2021-07-09 18:00:01,517 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) [2021-07-09 18:00:01,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:00:01,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 37 conjunts are in the unsatisfiable core [2021-07-09 18:00:01,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:00:02,571 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 273 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:00:02,571 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1276064266] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:00:02,571 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:00:02,571 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 37] total 56 [2021-07-09 18:00:02,571 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816919430] [2021-07-09 18:00:02,571 INFO L462 AbstractCegarLoop]: Interpolant automaton has 57 states [2021-07-09 18:00:02,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:00:02,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-07-09 18:00:02,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=623, Invalid=2569, Unknown=0, NotChecked=0, Total=3192 [2021-07-09 18:00:02,572 INFO L87 Difference]: Start difference. First operand 400 states and 823 transitions. Second operand has 57 states, 57 states have (on average 2.6315789473684212) internal successors, (150), 56 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:00:15,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:00:15,891 INFO L93 Difference]: Finished difference Result 3809 states and 7593 transitions. [2021-07-09 18:00:15,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 362 states. [2021-07-09 18:00:15,891 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 2.6315789473684212) internal successors, (150), 56 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-07-09 18:00:15,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:00:15,895 INFO L225 Difference]: With dead ends: 3809 [2021-07-09 18:00:15,895 INFO L226 Difference]: Without dead ends: 3805 [2021-07-09 18:00:15,902 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 474 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 413 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81707 ImplicationChecksByTransitivity, 12343.7ms TimeCoverageRelationStatistics Valid=40466, Invalid=131344, Unknown=0, NotChecked=0, Total=171810 [2021-07-09 18:00:15,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3805 states. [2021-07-09 18:00:15,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3805 to 336. [2021-07-09 18:00:15,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 335 states have (on average 2.0776119402985076) internal successors, (696), 335 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:00:15,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 696 transitions. [2021-07-09 18:00:15,915 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 696 transitions. Word has length 80 [2021-07-09 18:00:15,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:00:15,915 INFO L482 AbstractCegarLoop]: Abstraction has 336 states and 696 transitions. [2021-07-09 18:00:15,915 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 57 states, 57 states have (on average 2.6315789473684212) internal successors, (150), 56 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:00:15,915 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 696 transitions. [2021-07-09 18:00:15,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-07-09 18:00:15,915 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:00:15,915 INFO L508 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:00:16,116 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:00:16,116 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:00:16,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:00:16,116 INFO L82 PathProgramCache]: Analyzing trace with hash 1064675037, now seen corresponding path program 49 times [2021-07-09 18:00:16,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:00:16,117 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792960411] [2021-07-09 18:00:16,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:00:16,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:00:16,320 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 0 proven. 578 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:00:16,320 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:00:16,321 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792960411] [2021-07-09 18:00:16,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792960411] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:00:16,321 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1420622631] [2021-07-09 18:00:16,321 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 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 [2021-07-09 18:00:16,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:00:16,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 71 conjunts are in the unsatisfiable core [2021-07-09 18:00:16,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:00:16,459 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 0 proven. 578 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:00:16,459 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1420622631] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:00:16,459 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:00:16,459 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2021-07-09 18:00:16,459 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438888436] [2021-07-09 18:00:16,459 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 18:00:16,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:00:16,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 18:00:16,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2021-07-09 18:00:16,460 INFO L87 Difference]: Start difference. First operand 336 states and 696 transitions. Second operand has 20 states, 20 states have (on average 4.1) internal successors, (82), 20 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:00:16,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:00:16,856 INFO L93 Difference]: Finished difference Result 1047 states and 2064 transitions. [2021-07-09 18:00:16,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 18:00:16,856 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.1) internal successors, (82), 20 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2021-07-09 18:00:16,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:00:16,857 INFO L225 Difference]: With dead ends: 1047 [2021-07-09 18:00:16,857 INFO L226 Difference]: Without dead ends: 930 [2021-07-09 18:00:16,857 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 98 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 168.9ms TimeCoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2021-07-09 18:00:16,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 930 states. [2021-07-09 18:00:16,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 930 to 705. [2021-07-09 18:00:16,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 705 states, 704 states have (on average 2.15625) internal successors, (1518), 704 states have internal predecessors, (1518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:00:16,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 705 states to 705 states and 1518 transitions. [2021-07-09 18:00:16,864 INFO L78 Accepts]: Start accepts. Automaton has 705 states and 1518 transitions. Word has length 82 [2021-07-09 18:00:16,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:00:16,864 INFO L482 AbstractCegarLoop]: Abstraction has 705 states and 1518 transitions. [2021-07-09 18:00:16,864 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 4.1) internal successors, (82), 20 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:00:16,865 INFO L276 IsEmpty]: Start isEmpty. Operand 705 states and 1518 transitions. [2021-07-09 18:00:16,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-07-09 18:00:16,865 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:00:16,865 INFO L508 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:00:17,084 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:00:17,085 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:00:17,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:00:17,085 INFO L82 PathProgramCache]: Analyzing trace with hash 1343377115, now seen corresponding path program 50 times [2021-07-09 18:00:17,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:00:17,085 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913124063] [2021-07-09 18:00:17,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:00:17,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:00:17,727 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 289 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:00:17,727 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:00:17,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913124063] [2021-07-09 18:00:17,727 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913124063] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:00:17,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332370013] [2021-07-09 18:00:17,727 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 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 [2021-07-09 18:00:17,765 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:00:17,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:00:17,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 39 conjunts are in the unsatisfiable core [2021-07-09 18:00:17,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:00:19,055 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 289 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:00:19,055 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1332370013] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:00:19,055 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:00:19,055 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 39] total 77 [2021-07-09 18:00:19,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533396139] [2021-07-09 18:00:19,056 INFO L462 AbstractCegarLoop]: Interpolant automaton has 78 states [2021-07-09 18:00:19,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:00:19,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2021-07-09 18:00:19,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1028, Invalid=4978, Unknown=0, NotChecked=0, Total=6006 [2021-07-09 18:00:19,057 INFO L87 Difference]: Start difference. First operand 705 states and 1518 transitions. Second operand has 78 states, 78 states have (on average 2.076923076923077) internal successors, (162), 77 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:00:37,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:00:37,927 INFO L93 Difference]: Finished difference Result 6259 states and 12361 transitions. [2021-07-09 18:00:37,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 400 states. [2021-07-09 18:00:37,927 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 2.076923076923077) internal successors, (162), 77 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2021-07-09 18:00:37,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:00:37,932 INFO L225 Difference]: With dead ends: 6259 [2021-07-09 18:00:37,932 INFO L226 Difference]: Without dead ends: 5059 [2021-07-09 18:00:37,939 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 519 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 472 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103165 ImplicationChecksByTransitivity, 15971.3ms TimeCoverageRelationStatistics Valid=62217, Invalid=161985, Unknown=0, NotChecked=0, Total=224202 [2021-07-09 18:00:37,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5059 states. [2021-07-09 18:00:37,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5059 to 422. [2021-07-09 18:00:37,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 422 states, 421 states have (on average 2.0641330166270784) internal successors, (869), 421 states have internal predecessors, (869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:00:37,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 422 states to 422 states and 869 transitions. [2021-07-09 18:00:37,958 INFO L78 Accepts]: Start accepts. Automaton has 422 states and 869 transitions. Word has length 84 [2021-07-09 18:00:37,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:00:37,958 INFO L482 AbstractCegarLoop]: Abstraction has 422 states and 869 transitions. [2021-07-09 18:00:37,958 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 78 states, 78 states have (on average 2.076923076923077) internal successors, (162), 77 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:00:37,958 INFO L276 IsEmpty]: Start isEmpty. Operand 422 states and 869 transitions. [2021-07-09 18:00:37,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-07-09 18:00:37,959 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:00:37,959 INFO L508 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:00:38,159 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-07-09 18:00:38,159 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:00:38,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:00:38,160 INFO L82 PathProgramCache]: Analyzing trace with hash 182530189, now seen corresponding path program 51 times [2021-07-09 18:00:38,160 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:00:38,160 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983515190] [2021-07-09 18:00:38,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:00:38,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:00:38,422 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 307 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:00:38,423 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:00:38,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983515190] [2021-07-09 18:00:38,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983515190] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:00:38,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1775140762] [2021-07-09 18:00:38,423 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 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 [2021-07-09 18:00:38,468 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2021-07-09 18:00:38,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:00:38,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 39 conjunts are in the unsatisfiable core [2021-07-09 18:00:38,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:00:39,560 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 307 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:00:39,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1775140762] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:00:39,560 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:00:39,560 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 39] total 59 [2021-07-09 18:00:39,561 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357045247] [2021-07-09 18:00:39,561 INFO L462 AbstractCegarLoop]: Interpolant automaton has 60 states [2021-07-09 18:00:39,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:00:39,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-07-09 18:00:39,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=686, Invalid=2854, Unknown=0, NotChecked=0, Total=3540 [2021-07-09 18:00:39,562 INFO L87 Difference]: Start difference. First operand 422 states and 869 transitions. Second operand has 60 states, 60 states have (on average 2.6333333333333333) internal successors, (158), 59 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:00:54,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:00:54,592 INFO L93 Difference]: Finished difference Result 4229 states and 8433 transitions. [2021-07-09 18:00:54,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 401 states. [2021-07-09 18:00:54,597 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 2.6333333333333333) internal successors, (158), 59 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2021-07-09 18:00:54,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:00:54,601 INFO L225 Difference]: With dead ends: 4229 [2021-07-09 18:00:54,601 INFO L226 Difference]: Without dead ends: 4225 [2021-07-09 18:00:54,608 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 519 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 455 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100740 ImplicationChecksByTransitivity, 13861.8ms TimeCoverageRelationStatistics Valid=49136, Invalid=159256, Unknown=0, NotChecked=0, Total=208392 [2021-07-09 18:00:54,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4225 states. [2021-07-09 18:00:54,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4225 to 354. [2021-07-09 18:00:54,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 354 states, 353 states have (on average 2.0793201133144477) internal successors, (734), 353 states have internal predecessors, (734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:00:54,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 734 transitions. [2021-07-09 18:00:54,622 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 734 transitions. Word has length 84 [2021-07-09 18:00:54,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:00:54,623 INFO L482 AbstractCegarLoop]: Abstraction has 354 states and 734 transitions. [2021-07-09 18:00:54,623 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 60 states, 60 states have (on average 2.6333333333333333) internal successors, (158), 59 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:00:54,623 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 734 transitions. [2021-07-09 18:00:54,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-07-09 18:00:54,623 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:00:54,623 INFO L508 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:00:54,826 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:00:54,826 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:00:54,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:00:54,826 INFO L82 PathProgramCache]: Analyzing trace with hash 1572502169, now seen corresponding path program 52 times [2021-07-09 18:00:54,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:00:54,826 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986494579] [2021-07-09 18:00:54,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:00:54,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:00:55,064 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 0 proven. 648 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:00:55,064 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:00:55,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986494579] [2021-07-09 18:00:55,064 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986494579] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:00:55,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [789223792] [2021-07-09 18:00:55,064 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 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 [2021-07-09 18:00:55,105 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:00:55,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:00:55,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 75 conjunts are in the unsatisfiable core [2021-07-09 18:00:55,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:00:55,231 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 0 proven. 648 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:00:55,231 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [789223792] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:00:55,231 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:00:55,231 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2021-07-09 18:00:55,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852898905] [2021-07-09 18:00:55,231 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 18:00:55,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:00:55,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 18:00:55,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2021-07-09 18:00:55,236 INFO L87 Difference]: Start difference. First operand 354 states and 734 transitions. Second operand has 21 states, 21 states have (on average 4.095238095238095) internal successors, (86), 21 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:00:55,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:00:55,625 INFO L93 Difference]: Finished difference Result 1106 states and 2181 transitions. [2021-07-09 18:00:55,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 18:00:55,625 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.095238095238095) internal successors, (86), 21 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2021-07-09 18:00:55,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:00:55,626 INFO L225 Difference]: With dead ends: 1106 [2021-07-09 18:00:55,626 INFO L226 Difference]: Without dead ends: 983 [2021-07-09 18:00:55,626 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 103 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 205.7ms TimeCoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2021-07-09 18:00:55,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 983 states. [2021-07-09 18:00:55,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 983 to 745. [2021-07-09 18:00:55,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 745 states, 744 states have (on average 2.157258064516129) internal successors, (1605), 744 states have internal predecessors, (1605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:00:55,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 745 states to 745 states and 1605 transitions. [2021-07-09 18:00:55,633 INFO L78 Accepts]: Start accepts. Automaton has 745 states and 1605 transitions. Word has length 86 [2021-07-09 18:00:55,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:00:55,633 INFO L482 AbstractCegarLoop]: Abstraction has 745 states and 1605 transitions. [2021-07-09 18:00:55,633 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 4.095238095238095) internal successors, (86), 21 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:00:55,633 INFO L276 IsEmpty]: Start isEmpty. Operand 745 states and 1605 transitions. [2021-07-09 18:00:55,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-07-09 18:00:55,634 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:00:55,634 INFO L508 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:00:55,836 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-07-09 18:00:55,837 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:00:55,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:00:55,837 INFO L82 PathProgramCache]: Analyzing trace with hash -5835881, now seen corresponding path program 53 times [2021-07-09 18:00:55,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:00:55,837 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122477767] [2021-07-09 18:00:55,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:00:55,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:00:56,435 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 324 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:00:56,435 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:00:56,435 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122477767] [2021-07-09 18:00:56,435 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122477767] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:00:56,435 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2045285951] [2021-07-09 18:00:56,436 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 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 [2021-07-09 18:00:56,479 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2021-07-09 18:00:56,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:00:56,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 18:00:56,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:00:57,828 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 324 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:00:57,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2045285951] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:00:57,829 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:00:57,829 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 41] total 81 [2021-07-09 18:00:57,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745236454] [2021-07-09 18:00:57,835 INFO L462 AbstractCegarLoop]: Interpolant automaton has 82 states [2021-07-09 18:00:57,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:00:57,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2021-07-09 18:00:57,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1132, Invalid=5510, Unknown=0, NotChecked=0, Total=6642 [2021-07-09 18:00:57,836 INFO L87 Difference]: Start difference. First operand 745 states and 1605 transitions. Second operand has 82 states, 82 states have (on average 2.073170731707317) internal successors, (170), 81 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:19,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:01:19,865 INFO L93 Difference]: Finished difference Result 6876 states and 13587 transitions. [2021-07-09 18:01:19,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 441 states. [2021-07-09 18:01:19,866 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 2.073170731707317) internal successors, (170), 81 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 88 [2021-07-09 18:01:19,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:01:19,872 INFO L225 Difference]: With dead ends: 6876 [2021-07-09 18:01:19,873 INFO L226 Difference]: Without dead ends: 5550 [2021-07-09 18:01:19,882 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 566 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 517 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126123 ImplicationChecksByTransitivity, 17991.7ms TimeCoverageRelationStatistics Valid=75002, Invalid=193840, Unknown=0, NotChecked=0, Total=268842 [2021-07-09 18:01:19,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5550 states. [2021-07-09 18:01:19,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5550 to 444. [2021-07-09 18:01:19,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 444 states, 443 states have (on average 2.0654627539503387) internal successors, (915), 443 states have internal predecessors, (915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:19,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 444 states to 444 states and 915 transitions. [2021-07-09 18:01:19,905 INFO L78 Accepts]: Start accepts. Automaton has 444 states and 915 transitions. Word has length 88 [2021-07-09 18:01:19,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:01:19,905 INFO L482 AbstractCegarLoop]: Abstraction has 444 states and 915 transitions. [2021-07-09 18:01:19,905 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 82 states, 82 states have (on average 2.073170731707317) internal successors, (170), 81 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:19,905 INFO L276 IsEmpty]: Start isEmpty. Operand 444 states and 915 transitions. [2021-07-09 18:01:19,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-07-09 18:01:19,906 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:01:19,906 INFO L508 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:01:20,123 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-07-09 18:01:20,123 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:01:20,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:01:20,123 INFO L82 PathProgramCache]: Analyzing trace with hash -2098512499, now seen corresponding path program 54 times [2021-07-09 18:01:20,123 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:01:20,123 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517937299] [2021-07-09 18:01:20,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:01:20,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:01:20,388 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 343 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:01:20,388 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:01:20,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517937299] [2021-07-09 18:01:20,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517937299] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:01:20,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [277173593] [2021-07-09 18:01:20,388 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 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:01:20,434 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2021-07-09 18:01:20,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:01:20,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 18:01:20,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:01:21,665 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 343 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:01:21,665 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [277173593] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:01:21,665 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:01:21,665 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 41] total 62 [2021-07-09 18:01:21,665 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861358206] [2021-07-09 18:01:21,675 INFO L462 AbstractCegarLoop]: Interpolant automaton has 63 states [2021-07-09 18:01:21,675 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:01:21,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2021-07-09 18:01:21,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=752, Invalid=3154, Unknown=0, NotChecked=0, Total=3906 [2021-07-09 18:01:21,677 INFO L87 Difference]: Start difference. First operand 444 states and 915 transitions. Second operand has 63 states, 63 states have (on average 2.634920634920635) internal successors, (166), 62 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:38,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:01:38,503 INFO L93 Difference]: Finished difference Result 4671 states and 9317 transitions. [2021-07-09 18:01:38,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 442 states. [2021-07-09 18:01:38,503 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 2.634920634920635) internal successors, (166), 62 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 88 [2021-07-09 18:01:38,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:01:38,508 INFO L225 Difference]: With dead ends: 4671 [2021-07-09 18:01:38,508 INFO L226 Difference]: Without dead ends: 4667 [2021-07-09 18:01:38,519 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 566 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 499 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122923 ImplicationChecksByTransitivity, 15419.3ms TimeCoverageRelationStatistics Valid=59132, Invalid=191368, Unknown=0, NotChecked=0, Total=250500 [2021-07-09 18:01:38,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4667 states. [2021-07-09 18:01:38,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4667 to 372. [2021-07-09 18:01:38,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 372 states, 371 states have (on average 2.0808625336927222) internal successors, (772), 371 states have internal predecessors, (772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:38,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 772 transitions. [2021-07-09 18:01:38,535 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 772 transitions. Word has length 88 [2021-07-09 18:01:38,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:01:38,535 INFO L482 AbstractCegarLoop]: Abstraction has 372 states and 772 transitions. [2021-07-09 18:01:38,535 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 63 states, 63 states have (on average 2.634920634920635) internal successors, (166), 62 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:38,536 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 772 transitions. [2021-07-09 18:01:38,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-07-09 18:01:38,536 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:01:38,536 INFO L508 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:01:38,748 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:01:38,749 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:01:38,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:01:38,749 INFO L82 PathProgramCache]: Analyzing trace with hash 2058936405, now seen corresponding path program 55 times [2021-07-09 18:01:38,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:01:38,749 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458477723] [2021-07-09 18:01:38,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:01:38,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:01:39,011 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 0 proven. 722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:01:39,011 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:01:39,011 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458477723] [2021-07-09 18:01:39,011 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458477723] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:01:39,011 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [171703636] [2021-07-09 18:01:39,011 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 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:01:39,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:01:39,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 79 conjunts are in the unsatisfiable core [2021-07-09 18:01:39,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:01:39,164 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 0 proven. 722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:01:39,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [171703636] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:01:39,164 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:01:39,164 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2021-07-09 18:01:39,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510908347] [2021-07-09 18:01:39,164 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 18:01:39,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:01:39,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 18:01:39,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2021-07-09 18:01:39,165 INFO L87 Difference]: Start difference. First operand 372 states and 772 transitions. Second operand has 22 states, 22 states have (on average 4.090909090909091) internal successors, (90), 22 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:39,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:01:39,607 INFO L93 Difference]: Finished difference Result 1165 states and 2298 transitions. [2021-07-09 18:01:39,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 18:01:39,607 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.090909090909091) internal successors, (90), 22 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2021-07-09 18:01:39,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:01:39,609 INFO L225 Difference]: With dead ends: 1165 [2021-07-09 18:01:39,609 INFO L226 Difference]: Without dead ends: 1036 [2021-07-09 18:01:39,609 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 108 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 208.7ms TimeCoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2021-07-09 18:01:39,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1036 states. [2021-07-09 18:01:39,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1036 to 785. [2021-07-09 18:01:39,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 785 states, 784 states have (on average 2.1581632653061225) internal successors, (1692), 784 states have internal predecessors, (1692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:39,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 785 states to 785 states and 1692 transitions. [2021-07-09 18:01:39,616 INFO L78 Accepts]: Start accepts. Automaton has 785 states and 1692 transitions. Word has length 90 [2021-07-09 18:01:39,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:01:39,617 INFO L482 AbstractCegarLoop]: Abstraction has 785 states and 1692 transitions. [2021-07-09 18:01:39,617 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 4.090909090909091) internal successors, (90), 22 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:39,617 INFO L276 IsEmpty]: Start isEmpty. Operand 785 states and 1692 transitions. [2021-07-09 18:01:39,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-07-09 18:01:39,618 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:01:39,618 INFO L508 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:01:39,819 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-07-09 18:01:39,819 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:01:39,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:01:39,819 INFO L82 PathProgramCache]: Analyzing trace with hash -274421165, now seen corresponding path program 56 times [2021-07-09 18:01:39,819 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:01:39,819 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143546448] [2021-07-09 18:01:39,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:01:39,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:01:40,461 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 361 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:01:40,461 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:01:40,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143546448] [2021-07-09 18:01:40,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143546448] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:01:40,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228583775] [2021-07-09 18:01:40,461 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 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 [2021-07-09 18:01:40,501 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:01:40,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:01:40,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-09 18:01:40,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:01:41,878 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 361 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:01:41,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [228583775] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:01:41,878 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:01:41,878 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 43] total 85 [2021-07-09 18:01:41,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828401753] [2021-07-09 18:01:41,878 INFO L462 AbstractCegarLoop]: Interpolant automaton has 86 states [2021-07-09 18:01:41,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:01:41,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2021-07-09 18:01:41,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1241, Invalid=6069, Unknown=0, NotChecked=0, Total=7310 [2021-07-09 18:01:41,880 INFO L87 Difference]: Start difference. First operand 785 states and 1692 transitions. Second operand has 86 states, 86 states have (on average 2.0697674418604652) internal successors, (178), 85 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) [2021-07-09 18:02:07,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:02:07,056 INFO L93 Difference]: Finished difference Result 7521 states and 14869 transitions. [2021-07-09 18:02:07,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 484 states. [2021-07-09 18:02:07,068 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 2.0697674418604652) internal successors, (178), 85 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) Word has length 92 [2021-07-09 18:02:07,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:02:07,075 INFO L225 Difference]: With dead ends: 7521 [2021-07-09 18:02:07,075 INFO L226 Difference]: Without dead ends: 6063 [2021-07-09 18:02:07,087 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 615 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 564 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152734 ImplicationChecksByTransitivity, 20465.7ms TimeCoverageRelationStatistics Valid=89669, Invalid=230121, Unknown=0, NotChecked=0, Total=319790 [2021-07-09 18:02:07,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6063 states. [2021-07-09 18:02:07,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6063 to 466. [2021-07-09 18:02:07,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 466 states, 465 states have (on average 2.066666666666667) internal successors, (961), 465 states have internal predecessors, (961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:07,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 466 states to 466 states and 961 transitions. [2021-07-09 18:02:07,112 INFO L78 Accepts]: Start accepts. Automaton has 466 states and 961 transitions. Word has length 92 [2021-07-09 18:02:07,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:02:07,112 INFO L482 AbstractCegarLoop]: Abstraction has 466 states and 961 transitions. [2021-07-09 18:02:07,112 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 86 states, 86 states have (on average 2.0697674418604652) internal successors, (178), 85 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) [2021-07-09 18:02:07,113 INFO L276 IsEmpty]: Start isEmpty. Operand 466 states and 961 transitions. [2021-07-09 18:02:07,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-07-09 18:02:07,113 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:02:07,113 INFO L508 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:02:07,331 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:02:07,331 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:02:07,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:02:07,331 INFO L82 PathProgramCache]: Analyzing trace with hash -207266931, now seen corresponding path program 57 times [2021-07-09 18:02:07,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:02:07,331 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120287806] [2021-07-09 18:02:07,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:02:07,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:02:07,618 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 381 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:07,618 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:02:07,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120287806] [2021-07-09 18:02:07,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120287806] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:07,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755192999] [2021-07-09 18:02:07,618 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 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 [2021-07-09 18:02:07,685 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 23 check-sat command(s) [2021-07-09 18:02:07,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:02:07,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-09 18:02:07,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:02:08,970 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 381 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:08,970 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [755192999] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:08,970 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:02:08,970 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 43] total 65 [2021-07-09 18:02:08,970 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588985776] [2021-07-09 18:02:08,970 INFO L462 AbstractCegarLoop]: Interpolant automaton has 66 states [2021-07-09 18:02:08,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:02:08,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-07-09 18:02:08,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=821, Invalid=3469, Unknown=0, NotChecked=0, Total=4290 [2021-07-09 18:02:08,971 INFO L87 Difference]: Start difference. First operand 466 states and 961 transitions. Second operand has 66 states, 66 states have (on average 2.6363636363636362) internal successors, (174), 65 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:27,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:02:27,542 INFO L93 Difference]: Finished difference Result 5135 states and 10245 transitions. [2021-07-09 18:02:27,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 485 states. [2021-07-09 18:02:27,542 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 2.6363636363636362) internal successors, (174), 65 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 92 [2021-07-09 18:02:27,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:02:27,547 INFO L225 Difference]: With dead ends: 5135 [2021-07-09 18:02:27,547 INFO L226 Difference]: Without dead ends: 5131 [2021-07-09 18:02:27,558 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 615 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 545 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148586 ImplicationChecksByTransitivity, 17080.3ms TimeCoverageRelationStatistics Valid=70583, Invalid=228079, Unknown=0, NotChecked=0, Total=298662 [2021-07-09 18:02:27,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5131 states. [2021-07-09 18:02:27,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5131 to 390. [2021-07-09 18:02:27,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 389 states have (on average 2.082262210796915) internal successors, (810), 389 states have internal predecessors, (810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:27,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 810 transitions. [2021-07-09 18:02:27,575 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 810 transitions. Word has length 92 [2021-07-09 18:02:27,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:02:27,575 INFO L482 AbstractCegarLoop]: Abstraction has 390 states and 810 transitions. [2021-07-09 18:02:27,575 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 66 states, 66 states have (on average 2.6363636363636362) internal successors, (174), 65 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:27,575 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 810 transitions. [2021-07-09 18:02:27,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-07-09 18:02:27,576 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:02:27,576 INFO L508 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:02:27,792 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-07-09 18:02:27,793 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:02:27,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:02:27,793 INFO L82 PathProgramCache]: Analyzing trace with hash 1646516241, now seen corresponding path program 58 times [2021-07-09 18:02:27,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:02:27,793 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566220367] [2021-07-09 18:02:27,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:02:27,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:02:28,029 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 0 proven. 800 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:28,029 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:02:28,029 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566220367] [2021-07-09 18:02:28,029 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566220367] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:28,029 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1850387992] [2021-07-09 18:02:28,029 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 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 [2021-07-09 18:02:28,069 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:02:28,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:02:28,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 83 conjunts are in the unsatisfiable core [2021-07-09 18:02:28,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:02:28,181 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 0 proven. 800 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:28,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1850387992] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:28,182 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:02:28,182 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2021-07-09 18:02:28,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477667600] [2021-07-09 18:02:28,182 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 18:02:28,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:02:28,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 18:02:28,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:02:28,183 INFO L87 Difference]: Start difference. First operand 390 states and 810 transitions. Second operand has 23 states, 23 states have (on average 4.086956521739131) internal successors, (94), 23 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:28,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:02:28,659 INFO L93 Difference]: Finished difference Result 1224 states and 2415 transitions. [2021-07-09 18:02:28,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 18:02:28,659 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.086956521739131) internal successors, (94), 23 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 94 [2021-07-09 18:02:28,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:02:28,661 INFO L225 Difference]: With dead ends: 1224 [2021-07-09 18:02:28,661 INFO L226 Difference]: Without dead ends: 1089 [2021-07-09 18:02:28,661 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 113 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 203.7ms TimeCoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:02:28,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1089 states. [2021-07-09 18:02:28,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1089 to 825. [2021-07-09 18:02:28,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 825 states, 824 states have (on average 2.158980582524272) internal successors, (1779), 824 states have internal predecessors, (1779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:28,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 825 states to 825 states and 1779 transitions. [2021-07-09 18:02:28,669 INFO L78 Accepts]: Start accepts. Automaton has 825 states and 1779 transitions. Word has length 94 [2021-07-09 18:02:28,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:02:28,669 INFO L482 AbstractCegarLoop]: Abstraction has 825 states and 1779 transitions. [2021-07-09 18:02:28,669 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 4.086956521739131) internal successors, (94), 23 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:28,670 INFO L276 IsEmpty]: Start isEmpty. Operand 825 states and 1779 transitions. [2021-07-09 18:02:28,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-07-09 18:02:28,670 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:02:28,670 INFO L508 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:02:28,886 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:02:28,886 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:02:28,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:02:28,886 INFO L82 PathProgramCache]: Analyzing trace with hash -2013367537, now seen corresponding path program 59 times [2021-07-09 18:02:28,886 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:02:28,886 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614407902] [2021-07-09 18:02:28,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:02:28,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:02:29,621 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 400 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:29,621 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:02:29,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614407902] [2021-07-09 18:02:29,621 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614407902] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:29,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1737101582] [2021-07-09 18:02:29,621 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-09 18:02:29,669 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2021-07-09 18:02:29,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:02:29,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 45 conjunts are in the unsatisfiable core [2021-07-09 18:02:29,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:02:31,159 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 400 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:31,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1737101582] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:31,159 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:02:31,159 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 45] total 89 [2021-07-09 18:02:31,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140023328] [2021-07-09 18:02:31,160 INFO L462 AbstractCegarLoop]: Interpolant automaton has 90 states [2021-07-09 18:02:31,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:02:31,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2021-07-09 18:02:31,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1355, Invalid=6655, Unknown=0, NotChecked=0, Total=8010 [2021-07-09 18:02:31,161 INFO L87 Difference]: Start difference. First operand 825 states and 1779 transitions. Second operand has 90 states, 90 states have (on average 2.066666666666667) internal successors, (186), 89 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:59,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:02:59,407 INFO L93 Difference]: Finished difference Result 8194 states and 16207 transitions. [2021-07-09 18:02:59,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 529 states. [2021-07-09 18:02:59,408 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 90 states have (on average 2.066666666666667) internal successors, (186), 89 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-07-09 18:02:59,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:02:59,415 INFO L225 Difference]: With dead ends: 8194 [2021-07-09 18:02:59,415 INFO L226 Difference]: Without dead ends: 6598 [2021-07-09 18:02:59,429 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 666 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 613 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183369 ImplicationChecksByTransitivity, 22844.1ms TimeCoverageRelationStatistics Valid=106395, Invalid=271215, Unknown=0, NotChecked=0, Total=377610 [2021-07-09 18:02:59,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6598 states. [2021-07-09 18:02:59,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6598 to 488. [2021-07-09 18:02:59,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 488 states, 487 states have (on average 2.0677618069815193) internal successors, (1007), 487 states have internal predecessors, (1007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:59,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 488 states to 488 states and 1007 transitions. [2021-07-09 18:02:59,452 INFO L78 Accepts]: Start accepts. Automaton has 488 states and 1007 transitions. Word has length 96 [2021-07-09 18:02:59,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:02:59,452 INFO L482 AbstractCegarLoop]: Abstraction has 488 states and 1007 transitions. [2021-07-09 18:02:59,452 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 90 states, 90 states have (on average 2.066666666666667) internal successors, (186), 89 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:59,452 INFO L276 IsEmpty]: Start isEmpty. Operand 488 states and 1007 transitions. [2021-07-09 18:02:59,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-07-09 18:02:59,453 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:02:59,453 INFO L508 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:02:59,653 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2021-07-09 18:02:59,654 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:02:59,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:02:59,654 INFO L82 PathProgramCache]: Analyzing trace with hash -817968499, now seen corresponding path program 60 times [2021-07-09 18:02:59,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:02:59,654 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493911500] [2021-07-09 18:02:59,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:02:59,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:02:59,978 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 421 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:59,978 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:02:59,978 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493911500] [2021-07-09 18:02:59,978 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493911500] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:59,978 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2103294549] [2021-07-09 18:02:59,978 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 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 [2021-07-09 18:03:00,027 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 24 check-sat command(s) [2021-07-09 18:03:00,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:03:00,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 45 conjunts are in the unsatisfiable core [2021-07-09 18:03:00,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:03:01,362 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 421 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:03:01,362 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2103294549] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:03:01,362 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:03:01,362 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 45] total 68 [2021-07-09 18:03:01,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740988703] [2021-07-09 18:03:01,362 INFO L462 AbstractCegarLoop]: Interpolant automaton has 69 states [2021-07-09 18:03:01,362 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:03:01,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2021-07-09 18:03:01,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=893, Invalid=3799, Unknown=0, NotChecked=0, Total=4692 [2021-07-09 18:03:01,363 INFO L87 Difference]: Start difference. First operand 488 states and 1007 transitions. Second operand has 69 states, 69 states have (on average 2.63768115942029) internal successors, (182), 68 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:03:22,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:03:22,295 INFO L93 Difference]: Finished difference Result 5621 states and 11217 transitions. [2021-07-09 18:03:22,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 530 states. [2021-07-09 18:03:22,296 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 2.63768115942029) internal successors, (182), 68 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-07-09 18:03:22,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:03:22,301 INFO L225 Difference]: With dead ends: 5621 [2021-07-09 18:03:22,301 INFO L226 Difference]: Without dead ends: 5617 [2021-07-09 18:03:22,315 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 666 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 593 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178076 ImplicationChecksByTransitivity, 19162.2ms TimeCoverageRelationStatistics Valid=83624, Invalid=269806, Unknown=0, NotChecked=0, Total=353430 [2021-07-09 18:03:22,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5617 states. [2021-07-09 18:03:22,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5617 to 408. [2021-07-09 18:03:22,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408 states, 407 states have (on average 2.0835380835380835) internal successors, (848), 407 states have internal predecessors, (848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:03:22,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 848 transitions. [2021-07-09 18:03:22,334 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 848 transitions. Word has length 96 [2021-07-09 18:03:22,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:03:22,334 INFO L482 AbstractCegarLoop]: Abstraction has 408 states and 848 transitions. [2021-07-09 18:03:22,334 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 69 states, 69 states have (on average 2.63768115942029) internal successors, (182), 68 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:03:22,334 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 848 transitions. [2021-07-09 18:03:22,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-07-09 18:03:22,335 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:03:22,335 INFO L508 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:03:22,550 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:03:22,551 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:03:22,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:03:22,551 INFO L82 PathProgramCache]: Analyzing trace with hash 1261330893, now seen corresponding path program 61 times [2021-07-09 18:03:22,551 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:03:22,551 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866352747] [2021-07-09 18:03:22,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:03:22,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:03:22,818 INFO L134 CoverageAnalysis]: Checked inductivity of 882 backedges. 0 proven. 882 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:03:22,818 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:03:22,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866352747] [2021-07-09 18:03:22,818 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866352747] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:03:22,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1032759025] [2021-07-09 18:03:22,818 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 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 [2021-07-09 18:03:22,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:03:22,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 87 conjunts are in the unsatisfiable core [2021-07-09 18:03:22,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:03:22,977 INFO L134 CoverageAnalysis]: Checked inductivity of 882 backedges. 0 proven. 882 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:03:22,978 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1032759025] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:03:22,978 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:03:22,978 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2021-07-09 18:03:22,978 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572722977] [2021-07-09 18:03:22,978 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 18:03:22,978 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:03:22,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 18:03:22,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=507, Unknown=0, NotChecked=0, Total=552 [2021-07-09 18:03:22,978 INFO L87 Difference]: Start difference. First operand 408 states and 848 transitions. Second operand has 24 states, 24 states have (on average 4.083333333333333) internal successors, (98), 24 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:03:23,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:03:23,499 INFO L93 Difference]: Finished difference Result 1283 states and 2532 transitions. [2021-07-09 18:03:23,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 18:03:23,500 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.083333333333333) internal successors, (98), 24 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 98 [2021-07-09 18:03:23,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:03:23,501 INFO L225 Difference]: With dead ends: 1283 [2021-07-09 18:03:23,501 INFO L226 Difference]: Without dead ends: 1142 [2021-07-09 18:03:23,501 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 118 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 231.5ms TimeCoverageRelationStatistics Valid=45, Invalid=507, Unknown=0, NotChecked=0, Total=552 [2021-07-09 18:03:23,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1142 states. [2021-07-09 18:03:23,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1142 to 865. [2021-07-09 18:03:23,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 865 states, 864 states have (on average 2.1597222222222223) internal successors, (1866), 864 states have internal predecessors, (1866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:03:23,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 865 states to 865 states and 1866 transitions. [2021-07-09 18:03:23,509 INFO L78 Accepts]: Start accepts. Automaton has 865 states and 1866 transitions. Word has length 98 [2021-07-09 18:03:23,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:03:23,509 INFO L482 AbstractCegarLoop]: Abstraction has 865 states and 1866 transitions. [2021-07-09 18:03:23,509 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 4.083333333333333) internal successors, (98), 24 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:03:23,510 INFO L276 IsEmpty]: Start isEmpty. Operand 865 states and 1866 transitions. [2021-07-09 18:03:23,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-07-09 18:03:23,510 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:03:23,510 INFO L508 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:03:23,711 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2021-07-09 18:03:23,711 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:03:23,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:03:23,711 INFO L82 PathProgramCache]: Analyzing trace with hash 2082950603, now seen corresponding path program 62 times [2021-07-09 18:03:23,711 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:03:23,711 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939250595] [2021-07-09 18:03:23,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:03:23,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:03:24,454 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 441 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:03:24,454 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:03:24,454 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939250595] [2021-07-09 18:03:24,454 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1939250595] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:03:24,454 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [602060422] [2021-07-09 18:03:24,454 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 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 [2021-07-09 18:03:24,495 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:03:24,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:03:24,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-09 18:03:24,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:03:26,046 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 441 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:03:26,046 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [602060422] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:03:26,046 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:03:26,046 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 47] total 93 [2021-07-09 18:03:26,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457304992] [2021-07-09 18:03:26,047 INFO L462 AbstractCegarLoop]: Interpolant automaton has 94 states [2021-07-09 18:03:26,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:03:26,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2021-07-09 18:03:26,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1474, Invalid=7268, Unknown=0, NotChecked=0, Total=8742 [2021-07-09 18:03:26,048 INFO L87 Difference]: Start difference. First operand 865 states and 1866 transitions. Second operand has 94 states, 94 states have (on average 2.0638297872340425) internal successors, (194), 93 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:03:58,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:03:58,065 INFO L93 Difference]: Finished difference Result 8895 states and 17601 transitions. [2021-07-09 18:03:58,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 576 states. [2021-07-09 18:03:58,065 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 94 states have (on average 2.0638297872340425) internal successors, (194), 93 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2021-07-09 18:03:58,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:03:58,073 INFO L225 Difference]: With dead ends: 8895 [2021-07-09 18:03:58,073 INFO L226 Difference]: Without dead ends: 7155 [2021-07-09 18:03:58,088 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 719 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 664 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218416 ImplicationChecksByTransitivity, 25478.8ms TimeCoverageRelationStatistics Valid=125365, Invalid=317525, Unknown=0, NotChecked=0, Total=442890 [2021-07-09 18:03:58,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7155 states. [2021-07-09 18:03:58,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7155 to 510. [2021-07-09 18:03:58,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 510 states, 509 states have (on average 2.068762278978389) internal successors, (1053), 509 states have internal predecessors, (1053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:03:58,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 510 states to 510 states and 1053 transitions. [2021-07-09 18:03:58,112 INFO L78 Accepts]: Start accepts. Automaton has 510 states and 1053 transitions. Word has length 100 [2021-07-09 18:03:58,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:03:58,112 INFO L482 AbstractCegarLoop]: Abstraction has 510 states and 1053 transitions. [2021-07-09 18:03:58,112 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 94 states, 94 states have (on average 2.0638297872340425) internal successors, (194), 93 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:03:58,112 INFO L276 IsEmpty]: Start isEmpty. Operand 510 states and 1053 transitions. [2021-07-09 18:03:58,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-07-09 18:03:58,113 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:03:58,113 INFO L508 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:03:58,313 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:03:58,313 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:03:58,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:03:58,313 INFO L82 PathProgramCache]: Analyzing trace with hash 894880397, now seen corresponding path program 63 times [2021-07-09 18:03:58,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:03:58,313 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955359308] [2021-07-09 18:03:58,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:03:58,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:03:58,630 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 463 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:03:58,630 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:03:58,630 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955359308] [2021-07-09 18:03:58,630 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955359308] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:03:58,630 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [859743265] [2021-07-09 18:03:58,630 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 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 [2021-07-09 18:03:58,686 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 25 check-sat command(s) [2021-07-09 18:03:58,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:03:58,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-09 18:03:58,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:04:00,151 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 463 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:04:00,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [859743265] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:04:00,151 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:04:00,151 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 47] total 71 [2021-07-09 18:04:00,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660331435] [2021-07-09 18:04:00,152 INFO L462 AbstractCegarLoop]: Interpolant automaton has 72 states [2021-07-09 18:04:00,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:04:00,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2021-07-09 18:04:00,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=968, Invalid=4144, Unknown=0, NotChecked=0, Total=5112 [2021-07-09 18:04:00,153 INFO L87 Difference]: Start difference. First operand 510 states and 1053 transitions. Second operand has 72 states, 72 states have (on average 2.638888888888889) internal successors, (190), 71 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:04:23,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:04:23,553 INFO L93 Difference]: Finished difference Result 6129 states and 12233 transitions. [2021-07-09 18:04:23,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 577 states. [2021-07-09 18:04:23,554 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 2.638888888888889) internal successors, (190), 71 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2021-07-09 18:04:23,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:04:23,559 INFO L225 Difference]: With dead ends: 6129 [2021-07-09 18:04:23,559 INFO L226 Difference]: Without dead ends: 6125 [2021-07-09 18:04:23,574 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 719 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 643 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211756 ImplicationChecksByTransitivity, 21528.5ms TimeCoverageRelationStatistics Valid=98396, Invalid=316984, Unknown=0, NotChecked=0, Total=415380 [2021-07-09 18:04:23,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6125 states. [2021-07-09 18:04:23,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6125 to 426. [2021-07-09 18:04:23,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 426 states, 425 states have (on average 2.084705882352941) internal successors, (886), 425 states have internal predecessors, (886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:04:23,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 426 states to 426 states and 886 transitions. [2021-07-09 18:04:23,593 INFO L78 Accepts]: Start accepts. Automaton has 426 states and 886 transitions. Word has length 100 [2021-07-09 18:04:23,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:04:23,593 INFO L482 AbstractCegarLoop]: Abstraction has 426 states and 886 transitions. [2021-07-09 18:04:23,593 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 72 states, 72 states have (on average 2.638888888888889) internal successors, (190), 71 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:04:23,593 INFO L276 IsEmpty]: Start isEmpty. Operand 426 states and 886 transitions. [2021-07-09 18:04:23,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-07-09 18:04:23,594 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:04:23,594 INFO L508 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:04:23,794 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-07-09 18:04:23,794 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:04:23,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:04:23,795 INFO L82 PathProgramCache]: Analyzing trace with hash -661946999, now seen corresponding path program 64 times [2021-07-09 18:04:23,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:04:23,795 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306269537] [2021-07-09 18:04:23,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:04:23,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:04:24,081 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 0 proven. 968 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:04:24,081 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:04:24,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306269537] [2021-07-09 18:04:24,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1306269537] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:04:24,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212241770] [2021-07-09 18:04:24,082 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 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 [2021-07-09 18:04:24,125 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:04:24,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:04:24,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 91 conjunts are in the unsatisfiable core [2021-07-09 18:04:24,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:04:24,250 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 0 proven. 968 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:04:24,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1212241770] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:04:24,251 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:04:24,251 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2021-07-09 18:04:24,251 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962105172] [2021-07-09 18:04:24,251 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 18:04:24,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:04:24,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 18:04:24,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2021-07-09 18:04:24,251 INFO L87 Difference]: Start difference. First operand 426 states and 886 transitions. Second operand has 25 states, 25 states have (on average 4.08) internal successors, (102), 25 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:04:24,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:04:24,830 INFO L93 Difference]: Finished difference Result 1342 states and 2649 transitions. [2021-07-09 18:04:24,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 18:04:24,831 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.08) internal successors, (102), 25 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 102 [2021-07-09 18:04:24,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:04:24,832 INFO L225 Difference]: With dead ends: 1342 [2021-07-09 18:04:24,832 INFO L226 Difference]: Without dead ends: 1195 [2021-07-09 18:04:24,832 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 123 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 253.2ms TimeCoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2021-07-09 18:04:24,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1195 states. [2021-07-09 18:04:24,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1195 to 905. [2021-07-09 18:04:24,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 905 states, 904 states have (on average 2.1603982300884956) internal successors, (1953), 904 states have internal predecessors, (1953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:04:24,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 905 states to 905 states and 1953 transitions. [2021-07-09 18:04:24,840 INFO L78 Accepts]: Start accepts. Automaton has 905 states and 1953 transitions. Word has length 102 [2021-07-09 18:04:24,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:04:24,840 INFO L482 AbstractCegarLoop]: Abstraction has 905 states and 1953 transitions. [2021-07-09 18:04:24,840 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 4.08) internal successors, (102), 25 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:04:24,840 INFO L276 IsEmpty]: Start isEmpty. Operand 905 states and 1953 transitions. [2021-07-09 18:04:24,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-07-09 18:04:24,841 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:04:24,841 INFO L508 BasicCegarLoop]: trace histogram [23, 23, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:04:25,041 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-07-09 18:04:25,041 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:04:25,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:04:25,042 INFO L82 PathProgramCache]: Analyzing trace with hash -887997817, now seen corresponding path program 65 times [2021-07-09 18:04:25,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:04:25,042 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550278863] [2021-07-09 18:04:25,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:04:25,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:04:25,853 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 484 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:04:25,853 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:04:25,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550278863] [2021-07-09 18:04:25,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550278863] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:04:25,854 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1515270801] [2021-07-09 18:04:25,854 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 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 [2021-07-09 18:04:25,903 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2021-07-09 18:04:25,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:04:25,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-09 18:04:25,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:04:27,605 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 484 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:04:27,605 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1515270801] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:04:27,605 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:04:27,605 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 49] total 97 [2021-07-09 18:04:27,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022040099] [2021-07-09 18:04:27,605 INFO L462 AbstractCegarLoop]: Interpolant automaton has 98 states [2021-07-09 18:04:27,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:04:27,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2021-07-09 18:04:27,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1598, Invalid=7908, Unknown=0, NotChecked=0, Total=9506 [2021-07-09 18:04:27,606 INFO L87 Difference]: Start difference. First operand 905 states and 1953 transitions. Second operand has 98 states, 98 states have (on average 2.061224489795918) internal successors, (202), 97 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:05:05,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:05:05,238 INFO L93 Difference]: Finished difference Result 9624 states and 19051 transitions. [2021-07-09 18:05:05,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 625 states. [2021-07-09 18:05:05,239 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 2.061224489795918) internal successors, (202), 97 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 104 [2021-07-09 18:05:05,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:05:05,247 INFO L225 Difference]: With dead ends: 9624 [2021-07-09 18:05:05,247 INFO L226 Difference]: Without dead ends: 7734 [2021-07-09 18:05:05,265 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 774 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 717 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258282 ImplicationChecksByTransitivity, 29137.6ms TimeCoverageRelationStatistics Valid=146772, Invalid=369470, Unknown=0, NotChecked=0, Total=516242 [2021-07-09 18:05:05,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7734 states. [2021-07-09 18:05:05,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7734 to 532. [2021-07-09 18:05:05,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 532 states, 531 states have (on average 2.0696798493408664) internal successors, (1099), 531 states have internal predecessors, (1099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:05:05,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 532 states to 532 states and 1099 transitions. [2021-07-09 18:05:05,291 INFO L78 Accepts]: Start accepts. Automaton has 532 states and 1099 transitions. Word has length 104 [2021-07-09 18:05:05,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:05:05,291 INFO L482 AbstractCegarLoop]: Abstraction has 532 states and 1099 transitions. [2021-07-09 18:05:05,291 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 98 states, 98 states have (on average 2.061224489795918) internal successors, (202), 97 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:05:05,291 INFO L276 IsEmpty]: Start isEmpty. Operand 532 states and 1099 transitions. [2021-07-09 18:05:05,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-07-09 18:05:05,292 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:05:05,292 INFO L508 BasicCegarLoop]: trace histogram [23, 23, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:05:05,496 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-07-09 18:05:05,497 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:05:05,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:05:05,497 INFO L82 PathProgramCache]: Analyzing trace with hash 922524557, now seen corresponding path program 66 times [2021-07-09 18:05:05,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:05:05,497 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556598902] [2021-07-09 18:05:05,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:05:05,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:05:05,890 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 507 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:05:05,891 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:05:05,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556598902] [2021-07-09 18:05:05,891 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556598902] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:05:05,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1580378073] [2021-07-09 18:05:05,891 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 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 [2021-07-09 18:05:05,942 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 26 check-sat command(s) [2021-07-09 18:05:05,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:05:05,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-09 18:05:05,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:05:07,512 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 507 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:05:07,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1580378073] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:05:07,512 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:05:07,512 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 49] total 74 [2021-07-09 18:05:07,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398767636] [2021-07-09 18:05:07,512 INFO L462 AbstractCegarLoop]: Interpolant automaton has 75 states [2021-07-09 18:05:07,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:05:07,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2021-07-09 18:05:07,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1046, Invalid=4504, Unknown=0, NotChecked=0, Total=5550 [2021-07-09 18:05:07,513 INFO L87 Difference]: Start difference. First operand 532 states and 1099 transitions. Second operand has 75 states, 75 states have (on average 2.64) internal successors, (198), 74 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:05:35,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:05:35,025 INFO L93 Difference]: Finished difference Result 6659 states and 13293 transitions. [2021-07-09 18:05:35,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 626 states. [2021-07-09 18:05:35,025 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 2.64) internal successors, (198), 74 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 104 [2021-07-09 18:05:35,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:05:35,032 INFO L225 Difference]: With dead ends: 6659 [2021-07-09 18:05:35,032 INFO L226 Difference]: Without dead ends: 6655 [2021-07-09 18:05:35,049 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 774 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 695 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250006 ImplicationChecksByTransitivity, 25125.6ms TimeCoverageRelationStatistics Valid=115046, Invalid=370066, Unknown=0, NotChecked=0, Total=485112 [2021-07-09 18:05:35,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6655 states. [2021-07-09 18:05:35,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6655 to 444. [2021-07-09 18:05:35,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 444 states, 443 states have (on average 2.0857787810383748) internal successors, (924), 443 states have internal predecessors, (924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:05:35,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 444 states to 444 states and 924 transitions. [2021-07-09 18:05:35,069 INFO L78 Accepts]: Start accepts. Automaton has 444 states and 924 transitions. Word has length 104 [2021-07-09 18:05:35,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:05:35,069 INFO L482 AbstractCegarLoop]: Abstraction has 444 states and 924 transitions. [2021-07-09 18:05:35,069 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 75 states, 75 states have (on average 2.64) internal successors, (198), 74 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:05:35,070 INFO L276 IsEmpty]: Start isEmpty. Operand 444 states and 924 transitions. [2021-07-09 18:05:35,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-07-09 18:05:35,070 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:05:35,070 INFO L508 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:05:35,271 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:05:35,271 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:05:35,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:05:35,271 INFO L82 PathProgramCache]: Analyzing trace with hash 409873221, now seen corresponding path program 67 times [2021-07-09 18:05:35,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:05:35,271 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826497442] [2021-07-09 18:05:35,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:05:35,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:05:35,595 INFO L134 CoverageAnalysis]: Checked inductivity of 1058 backedges. 0 proven. 1058 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:05:35,595 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:05:35,595 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826497442] [2021-07-09 18:05:35,595 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [826497442] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:05:35,595 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1433533768] [2021-07-09 18:05:35,596 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 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 [2021-07-09 18:05:35,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:05:35,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 95 conjunts are in the unsatisfiable core [2021-07-09 18:05:35,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:05:35,772 INFO L134 CoverageAnalysis]: Checked inductivity of 1058 backedges. 0 proven. 1058 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:05:35,773 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1433533768] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:05:35,773 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:05:35,773 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2021-07-09 18:05:35,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309011763] [2021-07-09 18:05:35,773 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-09 18:05:35,773 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:05:35,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-09 18:05:35,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=601, Unknown=0, NotChecked=0, Total=650 [2021-07-09 18:05:35,773 INFO L87 Difference]: Start difference. First operand 444 states and 924 transitions. Second operand has 26 states, 26 states have (on average 4.076923076923077) internal successors, (106), 26 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:05:36,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:05:36,363 INFO L93 Difference]: Finished difference Result 1401 states and 2766 transitions. [2021-07-09 18:05:36,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 18:05:36,363 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.076923076923077) internal successors, (106), 26 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 106 [2021-07-09 18:05:36,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:05:36,364 INFO L225 Difference]: With dead ends: 1401 [2021-07-09 18:05:36,364 INFO L226 Difference]: Without dead ends: 1248 [2021-07-09 18:05:36,365 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 128 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 287.4ms TimeCoverageRelationStatistics Valid=49, Invalid=601, Unknown=0, NotChecked=0, Total=650 [2021-07-09 18:05:36,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1248 states. [2021-07-09 18:05:36,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1248 to 945. [2021-07-09 18:05:36,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 945 states, 944 states have (on average 2.1610169491525424) internal successors, (2040), 944 states have internal predecessors, (2040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:05:36,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 945 states to 945 states and 2040 transitions. [2021-07-09 18:05:36,373 INFO L78 Accepts]: Start accepts. Automaton has 945 states and 2040 transitions. Word has length 106 [2021-07-09 18:05:36,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:05:36,373 INFO L482 AbstractCegarLoop]: Abstraction has 945 states and 2040 transitions. [2021-07-09 18:05:36,373 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 4.076923076923077) internal successors, (106), 26 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:05:36,373 INFO L276 IsEmpty]: Start isEmpty. Operand 945 states and 2040 transitions. [2021-07-09 18:05:36,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-07-09 18:05:36,374 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:05:36,374 INFO L508 BasicCegarLoop]: trace histogram [24, 24, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:05:36,577 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-07-09 18:05:36,577 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:05:36,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:05:36,577 INFO L82 PathProgramCache]: Analyzing trace with hash -1087227581, now seen corresponding path program 68 times [2021-07-09 18:05:36,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:05:36,577 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383626591] [2021-07-09 18:05:36,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:05:36,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:05:37,507 INFO L134 CoverageAnalysis]: Checked inductivity of 1105 backedges. 529 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:05:37,507 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:05:37,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383626591] [2021-07-09 18:05:37,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383626591] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:05:37,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1367793910] [2021-07-09 18:05:37,507 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 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 [2021-07-09 18:05:37,556 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:05:37,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:05:37,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 51 conjunts are in the unsatisfiable core [2021-07-09 18:05:37,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:05:39,439 INFO L134 CoverageAnalysis]: Checked inductivity of 1105 backedges. 529 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:05:39,439 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1367793910] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:05:39,439 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:05:39,439 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 51] total 101 [2021-07-09 18:05:39,439 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339360777] [2021-07-09 18:05:39,439 INFO L462 AbstractCegarLoop]: Interpolant automaton has 102 states [2021-07-09 18:05:39,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:05:39,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2021-07-09 18:05:39,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1727, Invalid=8575, Unknown=0, NotChecked=0, Total=10302 [2021-07-09 18:05:39,441 INFO L87 Difference]: Start difference. First operand 945 states and 2040 transitions. Second operand has 102 states, 102 states have (on average 2.0588235294117645) internal successors, (210), 101 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:22,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:06:22,614 INFO L93 Difference]: Finished difference Result 10381 states and 20557 transitions. [2021-07-09 18:06:22,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 676 states. [2021-07-09 18:06:22,615 INFO L78 Accepts]: Start accepts. Automaton has has 102 states, 102 states have (on average 2.0588235294117645) internal successors, (210), 101 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 108 [2021-07-09 18:06:22,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:06:22,624 INFO L225 Difference]: With dead ends: 10381 [2021-07-09 18:06:22,624 INFO L226 Difference]: Without dead ends: 8335 [2021-07-09 18:06:22,646 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 831 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 772 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303391 ImplicationChecksByTransitivity, 32494.7ms TimeCoverageRelationStatistics Valid=170817, Invalid=427485, Unknown=0, NotChecked=0, Total=598302 [2021-07-09 18:06:22,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8335 states. [2021-07-09 18:06:22,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8335 to 554. [2021-07-09 18:06:22,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 554 states, 553 states have (on average 2.0705244122965643) internal successors, (1145), 553 states have internal predecessors, (1145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:22,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 554 states to 554 states and 1145 transitions. [2021-07-09 18:06:22,674 INFO L78 Accepts]: Start accepts. Automaton has 554 states and 1145 transitions. Word has length 108 [2021-07-09 18:06:22,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:06:22,674 INFO L482 AbstractCegarLoop]: Abstraction has 554 states and 1145 transitions. [2021-07-09 18:06:22,674 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 102 states, 102 states have (on average 2.0588235294117645) internal successors, (210), 101 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:22,674 INFO L276 IsEmpty]: Start isEmpty. Operand 554 states and 1145 transitions. [2021-07-09 18:06:22,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-07-09 18:06:22,675 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:06:22,675 INFO L508 BasicCegarLoop]: trace histogram [24, 24, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:06:22,875 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:06:22,875 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:06:22,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:06:22,876 INFO L82 PathProgramCache]: Analyzing trace with hash 447708557, now seen corresponding path program 69 times [2021-07-09 18:06:22,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:06:22,876 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019477265] [2021-07-09 18:06:22,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:06:22,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:06:23,242 INFO L134 CoverageAnalysis]: Checked inductivity of 1105 backedges. 553 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:23,242 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:06:23,243 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019477265] [2021-07-09 18:06:23,243 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019477265] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:23,243 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1543035962] [2021-07-09 18:06:23,243 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 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 [2021-07-09 18:06:23,294 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2021-07-09 18:06:23,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:06:23,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 51 conjunts are in the unsatisfiable core [2021-07-09 18:06:23,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:06:25,004 INFO L134 CoverageAnalysis]: Checked inductivity of 1105 backedges. 553 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:25,004 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1543035962] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:25,004 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:06:25,005 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 51] total 77 [2021-07-09 18:06:25,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179875997] [2021-07-09 18:06:25,005 INFO L462 AbstractCegarLoop]: Interpolant automaton has 78 states [2021-07-09 18:06:25,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:06:25,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2021-07-09 18:06:25,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1127, Invalid=4879, Unknown=0, NotChecked=0, Total=6006 [2021-07-09 18:06:25,006 INFO L87 Difference]: Start difference. First operand 554 states and 1145 transitions. Second operand has 78 states, 78 states have (on average 2.641025641025641) internal successors, (206), 77 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:54,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:06:54,555 INFO L93 Difference]: Finished difference Result 7211 states and 14397 transitions. [2021-07-09 18:06:54,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 677 states. [2021-07-09 18:06:54,556 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 2.641025641025641) internal successors, (206), 77 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 108 [2021-07-09 18:06:54,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:06:54,563 INFO L225 Difference]: With dead ends: 7211 [2021-07-09 18:06:54,563 INFO L226 Difference]: Without dead ends: 7207 [2021-07-09 18:06:54,582 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 831 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 749 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293222 ImplicationChecksByTransitivity, 27018.4ms TimeCoverageRelationStatistics Valid=133727, Invalid=429523, Unknown=0, NotChecked=0, Total=563250 [2021-07-09 18:06:54,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7207 states. [2021-07-09 18:06:54,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7207 to 462. [2021-07-09 18:06:54,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 462 states, 461 states have (on average 2.0867678958785247) internal successors, (962), 461 states have internal predecessors, (962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:54,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 462 states to 462 states and 962 transitions. [2021-07-09 18:06:54,607 INFO L78 Accepts]: Start accepts. Automaton has 462 states and 962 transitions. Word has length 108 [2021-07-09 18:06:54,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:06:54,608 INFO L482 AbstractCegarLoop]: Abstraction has 462 states and 962 transitions. [2021-07-09 18:06:54,608 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 78 states, 78 states have (on average 2.641025641025641) internal successors, (206), 77 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:54,608 INFO L276 IsEmpty]: Start isEmpty. Operand 462 states and 962 transitions. [2021-07-09 18:06:54,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-07-09 18:06:54,608 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:06:54,608 INFO L508 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:06:54,809 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable71 [2021-07-09 18:06:54,809 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:06:54,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:06:54,809 INFO L82 PathProgramCache]: Analyzing trace with hash -2071368959, now seen corresponding path program 70 times [2021-07-09 18:06:54,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:06:54,809 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649866395] [2021-07-09 18:06:54,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:06:54,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:06:55,155 INFO L134 CoverageAnalysis]: Checked inductivity of 1152 backedges. 0 proven. 1152 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:55,155 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:06:55,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649866395] [2021-07-09 18:06:55,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649866395] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:55,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [158095638] [2021-07-09 18:06:55,155 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 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 [2021-07-09 18:06:55,210 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:06:55,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:06:55,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 99 conjunts are in the unsatisfiable core [2021-07-09 18:06:55,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:06:55,345 INFO L134 CoverageAnalysis]: Checked inductivity of 1152 backedges. 0 proven. 1152 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:55,345 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [158095638] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:55,345 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:06:55,346 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2021-07-09 18:06:55,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005535708] [2021-07-09 18:06:55,346 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-09 18:06:55,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:06:55,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-09 18:06:55,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=651, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:06:55,346 INFO L87 Difference]: Start difference. First operand 462 states and 962 transitions. Second operand has 27 states, 27 states have (on average 4.074074074074074) internal successors, (110), 27 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:55,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:06:55,982 INFO L93 Difference]: Finished difference Result 1460 states and 2883 transitions. [2021-07-09 18:06:55,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-09 18:06:55,982 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 4.074074074074074) internal successors, (110), 27 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2021-07-09 18:06:55,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:06:55,984 INFO L225 Difference]: With dead ends: 1460 [2021-07-09 18:06:55,984 INFO L226 Difference]: Without dead ends: 1301 [2021-07-09 18:06:55,984 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 133 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 291.9ms TimeCoverageRelationStatistics Valid=51, Invalid=651, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:06:55,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1301 states. [2021-07-09 18:06:55,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1301 to 985. [2021-07-09 18:06:55,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 985 states, 984 states have (on average 2.1615853658536586) internal successors, (2127), 984 states have internal predecessors, (2127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:55,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 985 states to 985 states and 2127 transitions. [2021-07-09 18:06:55,993 INFO L78 Accepts]: Start accepts. Automaton has 985 states and 2127 transitions. Word has length 110 [2021-07-09 18:06:55,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:06:55,993 INFO L482 AbstractCegarLoop]: Abstraction has 985 states and 2127 transitions. [2021-07-09 18:06:55,993 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 4.074074074074074) internal successors, (110), 27 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:55,993 INFO L276 IsEmpty]: Start isEmpty. Operand 985 states and 2127 transitions. [2021-07-09 18:06:55,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-07-09 18:06:55,994 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:06:55,994 INFO L508 BasicCegarLoop]: trace histogram [25, 25, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:06:56,194 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:06:56,194 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:06:56,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:06:56,195 INFO L82 PathProgramCache]: Analyzing trace with hash -293975553, now seen corresponding path program 71 times [2021-07-09 18:06:56,195 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:06:56,195 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221103986] [2021-07-09 18:06:56,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:06:56,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:06:57,121 INFO L134 CoverageAnalysis]: Checked inductivity of 1201 backedges. 576 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:57,122 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:06:57,122 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221103986] [2021-07-09 18:06:57,122 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221103986] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:57,122 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [827806759] [2021-07-09 18:06:57,122 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 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 [2021-07-09 18:06:57,173 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 26 check-sat command(s) [2021-07-09 18:06:57,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:06:57,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 53 conjunts are in the unsatisfiable core [2021-07-09 18:06:57,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:06:59,179 INFO L134 CoverageAnalysis]: Checked inductivity of 1201 backedges. 576 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:59,180 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [827806759] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:59,180 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:06:59,180 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 53] total 105 [2021-07-09 18:06:59,180 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734878842] [2021-07-09 18:06:59,180 INFO L462 AbstractCegarLoop]: Interpolant automaton has 106 states [2021-07-09 18:06:59,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:06:59,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2021-07-09 18:06:59,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1861, Invalid=9269, Unknown=0, NotChecked=0, Total=11130 [2021-07-09 18:06:59,182 INFO L87 Difference]: Start difference. First operand 985 states and 2127 transitions. Second operand has 106 states, 106 states have (on average 2.056603773584906) internal successors, (218), 105 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:07:47,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:07:47,799 INFO L93 Difference]: Finished difference Result 11166 states and 22119 transitions. [2021-07-09 18:07:47,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 729 states. [2021-07-09 18:07:47,799 INFO L78 Accepts]: Start accepts. Automaton has has 106 states, 106 states have (on average 2.056603773584906) internal successors, (218), 105 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 112 [2021-07-09 18:07:47,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:07:47,810 INFO L225 Difference]: With dead ends: 11166 [2021-07-09 18:07:47,810 INFO L226 Difference]: Without dead ends: 8958 [2021-07-09 18:07:47,838 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 890 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 829 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354186 ImplicationChecksByTransitivity, 35846.1ms TimeCoverageRelationStatistics Valid=197709, Invalid=492021, Unknown=0, NotChecked=0, Total=689730 [2021-07-09 18:07:47,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8958 states. [2021-07-09 18:07:47,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8958 to 576. [2021-07-09 18:07:47,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 576 states, 575 states have (on average 2.071304347826087) internal successors, (1191), 575 states have internal predecessors, (1191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:07:47,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 576 states to 576 states and 1191 transitions. [2021-07-09 18:07:47,868 INFO L78 Accepts]: Start accepts. Automaton has 576 states and 1191 transitions. Word has length 112 [2021-07-09 18:07:47,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:07:47,869 INFO L482 AbstractCegarLoop]: Abstraction has 576 states and 1191 transitions. [2021-07-09 18:07:47,869 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 106 states, 106 states have (on average 2.056603773584906) internal successors, (218), 105 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:07:47,869 INFO L276 IsEmpty]: Start isEmpty. Operand 576 states and 1191 transitions. [2021-07-09 18:07:47,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-07-09 18:07:47,869 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:07:47,870 INFO L508 BasicCegarLoop]: trace histogram [25, 25, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:07:48,070 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:07:48,070 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:07:48,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:07:48,070 INFO L82 PathProgramCache]: Analyzing trace with hash -1604407155, now seen corresponding path program 72 times [2021-07-09 18:07:48,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:07:48,071 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792793667] [2021-07-09 18:07:48,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:07:48,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:07:48,535 INFO L134 CoverageAnalysis]: Checked inductivity of 1201 backedges. 601 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:07:48,535 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:07:48,536 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792793667] [2021-07-09 18:07:48,536 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792793667] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:07:48,536 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405919509] [2021-07-09 18:07:48,536 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 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:07:48,592 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 28 check-sat command(s) [2021-07-09 18:07:48,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:07:48,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 53 conjunts are in the unsatisfiable core [2021-07-09 18:07:48,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:07:50,428 INFO L134 CoverageAnalysis]: Checked inductivity of 1201 backedges. 601 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:07:50,428 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [405919509] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:07:50,428 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:07:50,428 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 53] total 80 [2021-07-09 18:07:50,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143273278] [2021-07-09 18:07:50,429 INFO L462 AbstractCegarLoop]: Interpolant automaton has 81 states [2021-07-09 18:07:50,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:07:50,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2021-07-09 18:07:50,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1211, Invalid=5269, Unknown=0, NotChecked=0, Total=6480 [2021-07-09 18:07:50,430 INFO L87 Difference]: Start difference. First operand 576 states and 1191 transitions. Second operand has 81 states, 81 states have (on average 2.6419753086419755) internal successors, (214), 80 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:08:24,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:08:24,537 INFO L93 Difference]: Finished difference Result 7785 states and 15545 transitions. [2021-07-09 18:08:24,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 730 states. [2021-07-09 18:08:24,538 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 2.6419753086419755) internal successors, (214), 80 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 112 [2021-07-09 18:08:24,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:08:24,545 INFO L225 Difference]: With dead ends: 7785 [2021-07-09 18:08:24,545 INFO L226 Difference]: Without dead ends: 7781 [2021-07-09 18:08:24,571 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 890 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 805 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341817 ImplicationChecksByTransitivity, 30849.3ms TimeCoverageRelationStatistics Valid=154598, Invalid=495844, Unknown=0, NotChecked=0, Total=650442 [2021-07-09 18:08:24,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7781 states. [2021-07-09 18:08:24,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7781 to 480. [2021-07-09 18:08:24,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 480 states, 479 states have (on average 2.0876826722338206) internal successors, (1000), 479 states have internal predecessors, (1000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:08:24,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 480 states to 480 states and 1000 transitions. [2021-07-09 18:08:24,596 INFO L78 Accepts]: Start accepts. Automaton has 480 states and 1000 transitions. Word has length 112 [2021-07-09 18:08:24,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:08:24,596 INFO L482 AbstractCegarLoop]: Abstraction has 480 states and 1000 transitions. [2021-07-09 18:08:24,596 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 81 states, 81 states have (on average 2.6419753086419755) internal successors, (214), 80 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:08:24,597 INFO L276 IsEmpty]: Start isEmpty. Operand 480 states and 1000 transitions. [2021-07-09 18:08:24,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-07-09 18:08:24,597 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:08:24,597 INFO L508 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:08:24,797 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:08:24,798 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:08:24,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:08:24,798 INFO L82 PathProgramCache]: Analyzing trace with hash 34618557, now seen corresponding path program 73 times [2021-07-09 18:08:24,798 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:08:24,798 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125496838] [2021-07-09 18:08:24,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:08:24,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:08:25,143 INFO L134 CoverageAnalysis]: Checked inductivity of 1250 backedges. 0 proven. 1250 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:08:25,143 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:08:25,143 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125496838] [2021-07-09 18:08:25,143 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125496838] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:08:25,143 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2083373100] [2021-07-09 18:08:25,143 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 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:08:25,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:08:25,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 103 conjunts are in the unsatisfiable core [2021-07-09 18:08:25,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:08:25,333 INFO L134 CoverageAnalysis]: Checked inductivity of 1250 backedges. 0 proven. 1250 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:08:25,333 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2083373100] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:08:25,333 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:08:25,333 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2021-07-09 18:08:25,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749617848] [2021-07-09 18:08:25,333 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-09 18:08:25,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:08:25,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-09 18:08:25,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=703, Unknown=0, NotChecked=0, Total=756 [2021-07-09 18:08:25,334 INFO L87 Difference]: Start difference. First operand 480 states and 1000 transitions. Second operand has 28 states, 28 states have (on average 4.071428571428571) internal successors, (114), 28 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:08:26,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:08:26,120 INFO L93 Difference]: Finished difference Result 1519 states and 3000 transitions. [2021-07-09 18:08:26,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-09 18:08:26,120 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 4.071428571428571) internal successors, (114), 28 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 114 [2021-07-09 18:08:26,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:08:26,122 INFO L225 Difference]: With dead ends: 1519 [2021-07-09 18:08:26,122 INFO L226 Difference]: Without dead ends: 1354 [2021-07-09 18:08:26,122 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 138 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 305.9ms TimeCoverageRelationStatistics Valid=53, Invalid=703, Unknown=0, NotChecked=0, Total=756 [2021-07-09 18:08:26,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1354 states. [2021-07-09 18:08:26,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1354 to 1025. [2021-07-09 18:08:26,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1025 states, 1024 states have (on average 2.162109375) internal successors, (2214), 1024 states have internal predecessors, (2214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:08:26,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1025 states to 1025 states and 2214 transitions. [2021-07-09 18:08:26,132 INFO L78 Accepts]: Start accepts. Automaton has 1025 states and 2214 transitions. Word has length 114 [2021-07-09 18:08:26,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:08:26,132 INFO L482 AbstractCegarLoop]: Abstraction has 1025 states and 2214 transitions. [2021-07-09 18:08:26,132 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 4.071428571428571) internal successors, (114), 28 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:08:26,132 INFO L276 IsEmpty]: Start isEmpty. Operand 1025 states and 2214 transitions. [2021-07-09 18:08:26,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-07-09 18:08:26,133 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:08:26,133 INFO L508 BasicCegarLoop]: trace histogram [26, 26, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:08:26,333 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2021-07-09 18:08:26,334 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:08:26,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:08:26,334 INFO L82 PathProgramCache]: Analyzing trace with hash 979201211, now seen corresponding path program 74 times [2021-07-09 18:08:26,334 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:08:26,334 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409406555] [2021-07-09 18:08:26,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:08:26,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:08:27,343 INFO L134 CoverageAnalysis]: Checked inductivity of 1301 backedges. 625 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:08:27,343 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:08:27,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409406555] [2021-07-09 18:08:27,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409406555] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:08:27,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [978645455] [2021-07-09 18:08:27,343 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 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:08:27,392 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:08:27,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:08:27,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 55 conjunts are in the unsatisfiable core [2021-07-09 18:08:27,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:08:29,547 INFO L134 CoverageAnalysis]: Checked inductivity of 1301 backedges. 625 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:08:29,547 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [978645455] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:08:29,547 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:08:29,547 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 55] total 109 [2021-07-09 18:08:29,547 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663506938] [2021-07-09 18:08:29,548 INFO L462 AbstractCegarLoop]: Interpolant automaton has 110 states [2021-07-09 18:08:29,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:08:29,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2021-07-09 18:08:29,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2000, Invalid=9990, Unknown=0, NotChecked=0, Total=11990 [2021-07-09 18:08:29,549 INFO L87 Difference]: Start difference. First operand 1025 states and 2214 transitions. Second operand has 110 states, 110 states have (on average 2.0545454545454547) internal successors, (226), 109 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:09:25,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:09:25,167 INFO L93 Difference]: Finished difference Result 11979 states and 23737 transitions. [2021-07-09 18:09:25,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 784 states. [2021-07-09 18:09:25,168 INFO L78 Accepts]: Start accepts. Automaton has has 110 states, 110 states have (on average 2.0545454545454547) internal successors, (226), 109 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 116 [2021-07-09 18:09:25,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:09:25,179 INFO L225 Difference]: With dead ends: 11979 [2021-07-09 18:09:25,179 INFO L226 Difference]: Without dead ends: 9603 [2021-07-09 18:09:25,211 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 951 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 888 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 411127 ImplicationChecksByTransitivity, 39872.4ms TimeCoverageRelationStatistics Valid=227665, Invalid=563545, Unknown=0, NotChecked=0, Total=791210 [2021-07-09 18:09:25,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9603 states. [2021-07-09 18:09:25,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9603 to 598. [2021-07-09 18:09:25,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 598 states, 597 states have (on average 2.0720268006700167) internal successors, (1237), 597 states have internal predecessors, (1237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:09:25,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 598 states to 598 states and 1237 transitions. [2021-07-09 18:09:25,249 INFO L78 Accepts]: Start accepts. Automaton has 598 states and 1237 transitions. Word has length 116 [2021-07-09 18:09:25,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:09:25,249 INFO L482 AbstractCegarLoop]: Abstraction has 598 states and 1237 transitions. [2021-07-09 18:09:25,249 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 110 states, 110 states have (on average 2.0545454545454547) internal successors, (226), 109 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:09:25,249 INFO L276 IsEmpty]: Start isEmpty. Operand 598 states and 1237 transitions. [2021-07-09 18:09:25,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-07-09 18:09:25,250 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:09:25,250 INFO L508 BasicCegarLoop]: trace histogram [26, 26, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:09:25,450 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:09:25,450 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:09:25,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:09:25,451 INFO L82 PathProgramCache]: Analyzing trace with hash 1164539021, now seen corresponding path program 75 times [2021-07-09 18:09:25,451 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:09:25,451 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319002228] [2021-07-09 18:09:25,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:09:25,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:09:25,943 INFO L134 CoverageAnalysis]: Checked inductivity of 1301 backedges. 651 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:09:25,943 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:09:25,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319002228] [2021-07-09 18:09:25,943 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319002228] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:09:25,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1888575507] [2021-07-09 18:09:25,943 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 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:09:25,999 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 29 check-sat command(s) [2021-07-09 18:09:25,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:09:26,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 55 conjunts are in the unsatisfiable core [2021-07-09 18:09:26,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:09:27,912 INFO L134 CoverageAnalysis]: Checked inductivity of 1301 backedges. 651 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:09:27,913 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1888575507] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:09:27,913 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:09:27,913 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 55] total 83 [2021-07-09 18:09:27,913 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452330893] [2021-07-09 18:09:27,913 INFO L462 AbstractCegarLoop]: Interpolant automaton has 84 states [2021-07-09 18:09:27,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:09:27,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2021-07-09 18:09:27,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1298, Invalid=5674, Unknown=0, NotChecked=0, Total=6972 [2021-07-09 18:09:27,914 INFO L87 Difference]: Start difference. First operand 598 states and 1237 transitions. Second operand has 84 states, 84 states have (on average 2.642857142857143) internal successors, (222), 83 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) Received shutdown request... [2021-07-09 18:09:48,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 516 states. [2021-07-09 18:09:49,195 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:09:49,195 WARN L547 AbstractCegarLoop]: Verification canceled [2021-07-09 18:09:49,197 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-07-09 18:09:49,198 WARN L196 ceAbstractionStarter]: Timeout [2021-07-09 18:09:49,199 INFO L202 PluginConnector]: Adding new model figure1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.07 06:09:49 BasicIcfg [2021-07-09 18:09:49,199 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-07-09 18:09:49,199 INFO L168 Benchmark]: Toolchain (without parser) took 766932.20 ms. Allocated memory was 191.9 MB in the beginning and 1.5 GB in the end (delta: 1.3 GB). Free memory was 171.2 MB in the beginning and 576.5 MB in the end (delta: -405.3 MB). Peak memory consumption was 931.0 MB. Max. memory is 8.0 GB. [2021-07-09 18:09:49,199 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.10 ms. Allocated memory is still 191.9 MB. Free memory is still 172.2 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-07-09 18:09:49,199 INFO L168 Benchmark]: Boogie Procedure Inliner took 19.68 ms. Allocated memory is still 191.9 MB. Free memory was 171.1 MB in the beginning and 169.6 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 8.0 GB. [2021-07-09 18:09:49,199 INFO L168 Benchmark]: Boogie Preprocessor took 12.27 ms. Allocated memory is still 191.9 MB. Free memory was 169.6 MB in the beginning and 168.7 MB in the end (delta: 893.4 kB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-07-09 18:09:49,199 INFO L168 Benchmark]: RCFGBuilder took 255.57 ms. Allocated memory is still 191.9 MB. Free memory was 168.6 MB in the beginning and 157.3 MB in the end (delta: 11.3 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. [2021-07-09 18:09:49,199 INFO L168 Benchmark]: TraceAbstraction took 766640.47 ms. Allocated memory was 191.9 MB in the beginning and 1.5 GB in the end (delta: 1.3 GB). Free memory was 156.8 MB in the beginning and 576.5 MB in the end (delta: -419.8 MB). Peak memory consumption was 916.4 MB. Max. memory is 8.0 GB. [2021-07-09 18:09:49,199 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.10 ms. Allocated memory is still 191.9 MB. Free memory is still 172.2 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 19.68 ms. Allocated memory is still 191.9 MB. Free memory was 171.1 MB in the beginning and 169.6 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 8.0 GB. * Boogie Preprocessor took 12.27 ms. Allocated memory is still 191.9 MB. Free memory was 169.6 MB in the beginning and 168.7 MB in the end (delta: 893.4 kB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 255.57 ms. Allocated memory is still 191.9 MB. Free memory was 168.6 MB in the beginning and 157.3 MB in the end (delta: 11.3 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. * TraceAbstraction took 766640.47 ms. Allocated memory was 191.9 MB in the beginning and 1.5 GB in the end (delta: 1.3 GB). Free memory was 156.8 MB in the beginning and 576.5 MB in the end (delta: -419.8 MB). Peak memory consumption was 916.4 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 50]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was constructing difference of abstraction (598states) and FLOYD_HOARE automaton (currently 516 states, 84 states before enhancement),while ReachableStatesComputation was computing reachable states (5193 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 5 procedures, 31 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 766551.5ms, OverallIterations: 78, TraceHistogramMax: 26, EmptinessCheckTime: 54.0ms, AutomataDifference: 679637.7ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 31.7ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 6967 SDtfs, 43959 SDslu, 114565 SDs, 0 SdLazy, 123444 SolverSat, 7161 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 57434.9ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 22268 GetRequests, 4241 SyntacticMatches, 50 SemanticMatches, 17977 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4639332 ImplicationChecksByTransitivity, 572390.2ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=1025occurred in iteration=76, InterpolantAutomatonStates: 15058, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 881.3ms AutomataMinimizationTime, 77 MinimizatonAttempts, 159442 StatesRemovedByMinimization, 77 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 414.6ms SsaConstructionTime, 1822.8ms SatisfiabilityAnalysisTime, 65842.4ms InterpolantComputationTime, 10162 NumberOfCodeBlocks, 10162 NumberOfCodeBlocksAsserted, 734 NumberOfCheckSat, 10008 ConstructedInterpolants, 0 QuantifiedInterpolants, 73195 SizeOfPredicates, 229 NumberOfNonLiveVariables, 13108 ConjunctsInSsa, 2930 ConjunctsInUnsatCore, 154 InterpolantComputations, 2 PerfectInterpolantSequences, 22801/69003 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown