/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-a47a088281b0b97d17910950432b7c5b5bc3adeb-a47a088 [2021-07-13 19:58:05,449 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-07-13 19:58:05,451 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-07-13 19:58:05,490 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-07-13 19:58:05,540 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-07-13 19:58:05,540 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-07-13 19:58:05,541 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-07-13 19:58:05,544 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 [2021-07-13 19:58:05,570 INFO L113 SettingsManager]: Loading preferences was successful [2021-07-13 19:58:05,570 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-07-13 19:58:05,570 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-07-13 19:58:05,570 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-07-13 19:58:05,572 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-07-13 19:58:05,573 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-07-13 19:58:05,573 INFO L138 SettingsManager]: * Use SBE=true [2021-07-13 19:58:05,573 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-07-13 19:58:05,573 INFO L138 SettingsManager]: * sizeof long=4 [2021-07-13 19:58:05,573 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-07-13 19:58:05,574 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-07-13 19:58:05,574 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-07-13 19:58:05,574 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-07-13 19:58:05,591 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-07-13 19:58:05,591 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-07-13 19:58:05,591 INFO L138 SettingsManager]: * sizeof long double=12 [2021-07-13 19:58:05,591 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-07-13 19:58:05,591 INFO L138 SettingsManager]: * Use constant arrays=true [2021-07-13 19:58:05,591 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-07-13 19:58:05,592 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-07-13 19:58:05,592 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-07-13 19:58:05,592 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-07-13 19:58:05,592 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-07-13 19:58:05,592 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-13 19:58:05,592 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-07-13 19:58:05,592 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-07-13 19:58:05,592 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-07-13 19:58:05,593 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-07-13 19:58:05,593 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-07-13 19:58:05,593 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-07-13 19:58:05,593 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-07-13 19:58:05,593 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-07-13 19:58:05,842 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-07-13 19:58:05,858 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-07-13 19:58:05,860 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-07-13 19:58:05,860 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-07-13 19:58:05,861 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-07-13 19:58:05,862 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/figure1.wvr.bpl [2021-07-13 19:58:05,862 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/figure1.wvr.bpl' [2021-07-13 19:58:05,885 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-07-13 19:58:05,887 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-07-13 19:58:05,888 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-07-13 19:58:05,888 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-07-13 19:58:05,888 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-07-13 19:58:05,899 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "figure1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:58:05" (1/1) ... [2021-07-13 19:58:05,904 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "figure1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:58:05" (1/1) ... [2021-07-13 19:58:05,909 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-07-13 19:58:05,910 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-07-13 19:58:05,910 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-07-13 19:58:05,910 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-07-13 19:58:05,916 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "figure1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:58:05" (1/1) ... [2021-07-13 19:58:05,916 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "figure1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:58:05" (1/1) ... [2021-07-13 19:58:05,916 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "figure1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:58:05" (1/1) ... [2021-07-13 19:58:05,916 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "figure1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:58:05" (1/1) ... [2021-07-13 19:58:05,918 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "figure1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:58:05" (1/1) ... [2021-07-13 19:58:05,920 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "figure1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:58:05" (1/1) ... [2021-07-13 19:58:05,920 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "figure1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:58:05" (1/1) ... [2021-07-13 19:58:05,921 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-07-13 19:58:05,921 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-07-13 19:58:05,921 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-07-13 19:58:05,921 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-07-13 19:58:05,922 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "figure1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:58:05" (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 [2021-07-13 19:58:05,970 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-07-13 19:58:05,971 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-07-13 19:58:05,971 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-07-13 19:58:05,971 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-07-13 19:58:05,971 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-07-13 19:58:05,971 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-07-13 19:58:05,971 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-07-13 19:58:05,971 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-07-13 19:58:05,972 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-07-13 19:58:05,972 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-07-13 19:58:06,090 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-07-13 19:58:06,090 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-07-13 19:58:06,092 INFO L202 PluginConnector]: Adding new model figure1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 07:58:06 BoogieIcfgContainer [2021-07-13 19:58:06,092 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-07-13 19:58:06,095 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-07-13 19:58:06,095 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-07-13 19:58:06,097 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-07-13 19:58:06,097 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "figure1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:58:05" (1/2) ... [2021-07-13 19:58:06,098 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e382a7b and model type figure1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 07:58:06, skipping insertion in model container [2021-07-13 19:58:06,098 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "figure1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 07:58:06" (2/2) ... [2021-07-13 19:58:06,099 INFO L111 eAbstractionObserver]: Analyzing ICFG figure1.wvr.bpl [2021-07-13 19:58:06,102 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-07-13 19:58:06,102 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-07-13 19:58:06,103 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-07-13 19:58:06,103 INFO L474 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-07-13 19:58:06,123 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-07-13 19:58:06,137 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-07-13 19:58:06,149 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-07-13 19:58:06,149 INFO L379 AbstractCegarLoop]: Hoare is false [2021-07-13 19:58:06,150 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-07-13 19:58:06,150 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-07-13 19:58:06,150 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-07-13 19:58:06,150 INFO L383 AbstractCegarLoop]: Difference is false [2021-07-13 19:58:06,150 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-07-13 19:58:06,150 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-07-13 19:58:06,156 INFO L110 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 27 places, 22 transitions, 60 flow [2021-07-13 19:58:06,164 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) [2021-07-13 19:58:06,166 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) [2021-07-13 19:58:06,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-07-13 19:58:06,169 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:58:06,170 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:58:06,170 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:58:06,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:58:06,174 INFO L82 PathProgramCache]: Analyzing trace with hash -155133599, now seen corresponding path program 1 times [2021-07-13 19:58:06,179 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:58:06,179 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496268154] [2021-07-13 19:58:06,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:58:06,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:58:06,260 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:06,261 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:58:06,261 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496268154] [2021-07-13 19:58:06,262 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496268154] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:58:06,262 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:58:06,262 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-13 19:58:06,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839212071] [2021-07-13 19:58:06,265 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-13 19:58:06,265 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:58:06,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-13 19:58:06,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-13 19:58:06,274 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) [2021-07-13 19:58:06,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:58:06,290 INFO L93 Difference]: Finished difference Result 57 states and 100 transitions. [2021-07-13 19:58:06,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-13 19:58:06,292 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 [2021-07-13 19:58:06,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:58:06,298 INFO L225 Difference]: With dead ends: 57 [2021-07-13 19:58:06,298 INFO L226 Difference]: Without dead ends: 42 [2021-07-13 19:58:06,299 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-13 19:58:06,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-07-13 19:58:06,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 40. [2021-07-13 19:58:06,319 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) [2021-07-13 19:58:06,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 71 transitions. [2021-07-13 19:58:06,320 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 71 transitions. Word has length 14 [2021-07-13 19:58:06,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:58:06,321 INFO L482 AbstractCegarLoop]: Abstraction has 40 states and 71 transitions. [2021-07-13 19:58:06,321 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) [2021-07-13 19:58:06,321 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 71 transitions. [2021-07-13 19:58:06,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:58:06,322 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:58:06,331 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:58:06,331 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-07-13 19:58:06,331 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:58:06,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:58:06,332 INFO L82 PathProgramCache]: Analyzing trace with hash -1800134561, now seen corresponding path program 1 times [2021-07-13 19:58:06,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:58:06,332 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180615191] [2021-07-13 19:58:06,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:58:06,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:58:06,395 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:06,395 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:58:06,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180615191] [2021-07-13 19:58:06,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180615191] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:06,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [692702782] [2021-07-13 19:58:06,396 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 [2021-07-13 19:58:06,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:58:06,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 5 conjunts are in the unsatisfiable core [2021-07-13 19:58:06,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:58:06,539 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:06,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [692702782] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:06,540 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:58:06,540 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 9 [2021-07-13 19:58:06,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970502977] [2021-07-13 19:58:06,541 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:58:06,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:58:06,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:58:06,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:58:06,543 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) [2021-07-13 19:58:06,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:58:06,698 INFO L93 Difference]: Finished difference Result 63 states and 108 transitions. [2021-07-13 19:58:06,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-13 19:58:06,698 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 [2021-07-13 19:58:06,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:58:06,701 INFO L225 Difference]: With dead ends: 63 [2021-07-13 19:58:06,701 INFO L226 Difference]: Without dead ends: 63 [2021-07-13 19:58:06,703 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 136.1ms TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:58:06,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-07-13 19:58:06,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 45. [2021-07-13 19:58:06,719 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) [2021-07-13 19:58:06,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 80 transitions. [2021-07-13 19:58:06,722 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 80 transitions. Word has length 16 [2021-07-13 19:58:06,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:58:06,722 INFO L482 AbstractCegarLoop]: Abstraction has 45 states and 80 transitions. [2021-07-13 19:58:06,722 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) [2021-07-13 19:58:06,722 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 80 transitions. [2021-07-13 19:58:06,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:58:06,723 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:58:06,723 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:58:06,939 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-07-13 19:58:06,941 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:58:06,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:58:06,943 INFO L82 PathProgramCache]: Analyzing trace with hash -1152959347, now seen corresponding path program 2 times [2021-07-13 19:58:06,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:58:06,943 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347888288] [2021-07-13 19:58:06,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:58:06,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:58:06,979 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:06,979 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:58:06,980 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347888288] [2021-07-13 19:58:06,980 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347888288] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:58:06,980 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:58:06,980 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-07-13 19:58:06,981 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957752376] [2021-07-13 19:58:06,981 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-13 19:58:06,982 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:58:06,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-13 19:58:06,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-07-13 19:58:06,986 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) [2021-07-13 19:58:07,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:58:07,059 INFO L93 Difference]: Finished difference Result 50 states and 88 transitions. [2021-07-13 19:58:07,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:58:07,060 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 [2021-07-13 19:58:07,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:58:07,062 INFO L225 Difference]: With dead ends: 50 [2021-07-13 19:58:07,062 INFO L226 Difference]: Without dead ends: 48 [2021-07-13 19:58:07,062 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 45.1ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:58:07,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-07-13 19:58:07,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 43. [2021-07-13 19:58:07,064 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) [2021-07-13 19:58:07,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 76 transitions. [2021-07-13 19:58:07,065 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 76 transitions. Word has length 16 [2021-07-13 19:58:07,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:58:07,065 INFO L482 AbstractCegarLoop]: Abstraction has 43 states and 76 transitions. [2021-07-13 19:58:07,065 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) [2021-07-13 19:58:07,065 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 76 transitions. [2021-07-13 19:58:07,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:58:07,066 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:58:07,066 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:58:07,066 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-07-13 19:58:07,066 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:58:07,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:58:07,067 INFO L82 PathProgramCache]: Analyzing trace with hash 19790621, now seen corresponding path program 1 times [2021-07-13 19:58:07,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:58:07,067 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412743775] [2021-07-13 19:58:07,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:58:07,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:58:07,143 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:07,143 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:58:07,143 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412743775] [2021-07-13 19:58:07,144 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412743775] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:07,144 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [584253437] [2021-07-13 19:58:07,144 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) [2021-07-13 19:58:07,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:58:07,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 19:58:07,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:58:07,279 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:07,279 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [584253437] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:07,279 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:58:07,279 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-07-13 19:58:07,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153454285] [2021-07-13 19:58:07,280 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-13 19:58:07,280 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:58:07,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-13 19:58:07,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-13 19:58:07,280 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) [2021-07-13 19:58:07,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:58:07,295 INFO L93 Difference]: Finished difference Result 96 states and 173 transitions. [2021-07-13 19:58:07,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-13 19:58:07,295 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 [2021-07-13 19:58:07,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:58:07,296 INFO L225 Difference]: With dead ends: 96 [2021-07-13 19:58:07,296 INFO L226 Difference]: Without dead ends: 75 [2021-07-13 19:58:07,296 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.9ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-13 19:58:07,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-07-13 19:58:07,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 58. [2021-07-13 19:58:07,299 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) [2021-07-13 19:58:07,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 109 transitions. [2021-07-13 19:58:07,300 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 109 transitions. Word has length 18 [2021-07-13 19:58:07,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:58:07,300 INFO L482 AbstractCegarLoop]: Abstraction has 58 states and 109 transitions. [2021-07-13 19:58:07,300 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) [2021-07-13 19:58:07,300 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 109 transitions. [2021-07-13 19:58:07,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:58:07,301 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:58:07,301 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:58:07,519 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:58:07,520 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:58:07,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:58:07,520 INFO L82 PathProgramCache]: Analyzing trace with hash 1443468059, now seen corresponding path program 2 times [2021-07-13 19:58:07,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:58:07,521 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048534908] [2021-07-13 19:58:07,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:58:07,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:58:07,573 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:07,573 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:58:07,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048534908] [2021-07-13 19:58:07,573 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048534908] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:07,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713799819] [2021-07-13 19:58:07,573 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 [2021-07-13 19:58:07,615 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:58:07,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:58:07,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 19:58:07,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:58:07,774 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:07,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1713799819] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:07,775 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:58:07,775 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2021-07-13 19:58:07,775 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407716266] [2021-07-13 19:58:07,775 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:58:07,775 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:58:07,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:58:07,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:58:07,776 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) [2021-07-13 19:58:08,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:58:08,056 INFO L93 Difference]: Finished difference Result 173 states and 308 transitions. [2021-07-13 19:58:08,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:58:08,057 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 [2021-07-13 19:58:08,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:58:08,058 INFO L225 Difference]: With dead ends: 173 [2021-07-13 19:58:08,058 INFO L226 Difference]: Without dead ends: 167 [2021-07-13 19:58:08,058 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 244.9ms TimeCoverageRelationStatistics Valid=185, Invalid=465, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:58:08,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-07-13 19:58:08,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 67. [2021-07-13 19:58:08,063 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) [2021-07-13 19:58:08,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 129 transitions. [2021-07-13 19:58:08,063 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 129 transitions. Word has length 20 [2021-07-13 19:58:08,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:58:08,064 INFO L482 AbstractCegarLoop]: Abstraction has 67 states and 129 transitions. [2021-07-13 19:58:08,064 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) [2021-07-13 19:58:08,064 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 129 transitions. [2021-07-13 19:58:08,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:58:08,064 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:58:08,064 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:58:08,280 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:58:08,281 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:58:08,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:58:08,281 INFO L82 PathProgramCache]: Analyzing trace with hash 1693280397, now seen corresponding path program 3 times [2021-07-13 19:58:08,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:58:08,281 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981781713] [2021-07-13 19:58:08,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:58:08,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:58:08,317 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:08,317 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:58:08,317 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981781713] [2021-07-13 19:58:08,317 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981781713] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:08,317 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1820006955] [2021-07-13 19:58:08,317 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 19:58:08,338 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:58:08,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:58:08,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 19:58:08,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:58:08,438 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:08,439 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1820006955] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:08,439 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:58:08,439 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-07-13 19:58:08,439 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721661001] [2021-07-13 19:58:08,439 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:58:08,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:58:08,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:58:08,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:58:08,440 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) [2021-07-13 19:58:08,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:58:08,687 INFO L93 Difference]: Finished difference Result 145 states and 267 transitions. [2021-07-13 19:58:08,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:58:08,688 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 [2021-07-13 19:58:08,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:58:08,689 INFO L225 Difference]: With dead ends: 145 [2021-07-13 19:58:08,689 INFO L226 Difference]: Without dead ends: 141 [2021-07-13 19:58:08,689 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 234.4ms TimeCoverageRelationStatistics Valid=176, Invalid=424, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:58:08,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-07-13 19:58:08,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 66. [2021-07-13 19:58:08,692 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) [2021-07-13 19:58:08,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 126 transitions. [2021-07-13 19:58:08,693 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 126 transitions. Word has length 20 [2021-07-13 19:58:08,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:58:08,693 INFO L482 AbstractCegarLoop]: Abstraction has 66 states and 126 transitions. [2021-07-13 19:58:08,693 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) [2021-07-13 19:58:08,693 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 126 transitions. [2021-07-13 19:58:08,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:58:08,694 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:58:08,694 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:58:08,910 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:58:08,911 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:58:08,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:58:08,911 INFO L82 PathProgramCache]: Analyzing trace with hash -1024348455, now seen corresponding path program 4 times [2021-07-13 19:58:08,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:58:08,911 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216735313] [2021-07-13 19:58:08,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:58:08,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:58:08,946 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:08,946 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:58:08,946 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216735313] [2021-07-13 19:58:08,946 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216735313] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:08,946 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792445497] [2021-07-13 19:58:08,946 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 [2021-07-13 19:58:08,966 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:58:08,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:58:08,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:58:08,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:58:08,999 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:09,000 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1792445497] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:09,000 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:58:09,000 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-07-13 19:58:09,000 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808152009] [2021-07-13 19:58:09,000 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-13 19:58:09,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:58:09,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-13 19:58:09,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-07-13 19:58:09,001 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) [2021-07-13 19:58:09,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:58:09,027 INFO L93 Difference]: Finished difference Result 162 states and 309 transitions. [2021-07-13 19:58:09,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-13 19:58:09,028 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 [2021-07-13 19:58:09,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:58:09,028 INFO L225 Difference]: With dead ends: 162 [2021-07-13 19:58:09,028 INFO L226 Difference]: Without dead ends: 135 [2021-07-13 19:58:09,028 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.5ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-07-13 19:58:09,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-07-13 19:58:09,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 105. [2021-07-13 19:58:09,032 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) [2021-07-13 19:58:09,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 213 transitions. [2021-07-13 19:58:09,033 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 213 transitions. Word has length 22 [2021-07-13 19:58:09,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:58:09,033 INFO L482 AbstractCegarLoop]: Abstraction has 105 states and 213 transitions. [2021-07-13 19:58:09,033 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) [2021-07-13 19:58:09,033 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 213 transitions. [2021-07-13 19:58:09,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 19:58:09,034 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:58:09,034 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:58:09,249 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-07-13 19:58:09,250 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:58:09,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:58:09,250 INFO L82 PathProgramCache]: Analyzing trace with hash -1876617257, now seen corresponding path program 5 times [2021-07-13 19:58:09,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:58:09,250 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757365601] [2021-07-13 19:58:09,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:58:09,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:58:09,319 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:09,319 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:58:09,319 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757365601] [2021-07-13 19:58:09,319 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757365601] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:09,319 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330624358] [2021-07-13 19:58:09,319 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 [2021-07-13 19:58:09,340 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:58:09,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:58:09,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 19:58:09,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:58:09,441 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:09,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [330624358] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:09,441 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:58:09,441 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-07-13 19:58:09,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861131900] [2021-07-13 19:58:09,441 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:58:09,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:58:09,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:58:09,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:58:09,442 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) [2021-07-13 19:58:09,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:58:09,851 INFO L93 Difference]: Finished difference Result 364 states and 691 transitions. [2021-07-13 19:58:09,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 19:58:09,852 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 [2021-07-13 19:58:09,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:58:09,853 INFO L225 Difference]: With dead ends: 364 [2021-07-13 19:58:09,853 INFO L226 Difference]: Without dead ends: 334 [2021-07-13 19:58:09,854 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 353.6ms TimeCoverageRelationStatistics Valid=402, Invalid=1080, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 19:58:09,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2021-07-13 19:58:09,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 92. [2021-07-13 19:58:09,857 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) [2021-07-13 19:58:09,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 179 transitions. [2021-07-13 19:58:09,858 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 179 transitions. Word has length 24 [2021-07-13 19:58:09,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:58:09,858 INFO L482 AbstractCegarLoop]: Abstraction has 92 states and 179 transitions. [2021-07-13 19:58:09,858 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) [2021-07-13 19:58:09,858 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 179 transitions. [2021-07-13 19:58:09,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 19:58:09,859 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:58:09,859 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:58:10,080 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:58:10,081 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:58:10,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:58:10,081 INFO L82 PathProgramCache]: Analyzing trace with hash -1240439411, now seen corresponding path program 6 times [2021-07-13 19:58:10,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:58:10,082 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066750474] [2021-07-13 19:58:10,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:58:10,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:58:10,186 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:10,186 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:58:10,186 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066750474] [2021-07-13 19:58:10,186 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066750474] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:10,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [263659734] [2021-07-13 19:58:10,187 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 [2021-07-13 19:58:10,216 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-13 19:58:10,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:58:10,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 19:58:10,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:58:10,347 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:10,347 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [263659734] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:10,347 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:58:10,348 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 14 [2021-07-13 19:58:10,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536923961] [2021-07-13 19:58:10,348 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:58:10,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:58:10,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:58:10,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:58:10,349 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) [2021-07-13 19:58:10,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:58:10,724 INFO L93 Difference]: Finished difference Result 239 states and 453 transitions. [2021-07-13 19:58:10,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 19:58:10,725 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 [2021-07-13 19:58:10,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:58:10,726 INFO L225 Difference]: With dead ends: 239 [2021-07-13 19:58:10,726 INFO L226 Difference]: Without dead ends: 235 [2021-07-13 19:58:10,726 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 365.2ms TimeCoverageRelationStatistics Valid=356, Invalid=976, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 19:58:10,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2021-07-13 19:58:10,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 84. [2021-07-13 19:58:10,729 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) [2021-07-13 19:58:10,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 164 transitions. [2021-07-13 19:58:10,730 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 164 transitions. Word has length 24 [2021-07-13 19:58:10,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:58:10,730 INFO L482 AbstractCegarLoop]: Abstraction has 84 states and 164 transitions. [2021-07-13 19:58:10,730 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) [2021-07-13 19:58:10,730 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 164 transitions. [2021-07-13 19:58:10,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 19:58:10,730 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:58:10,731 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:58:10,951 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:58:10,951 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:58:10,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:58:10,952 INFO L82 PathProgramCache]: Analyzing trace with hash -465636203, now seen corresponding path program 7 times [2021-07-13 19:58:10,952 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:58:10,952 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444427884] [2021-07-13 19:58:10,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:58:10,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:58:11,021 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:11,021 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:58:11,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444427884] [2021-07-13 19:58:11,021 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444427884] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:11,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1139753498] [2021-07-13 19:58:11,021 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 [2021-07-13 19:58:11,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:58:11,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:58:11,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:58:11,100 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:11,100 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1139753498] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:11,100 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:58:11,100 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-07-13 19:58:11,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535746766] [2021-07-13 19:58:11,101 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-13 19:58:11,101 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:58:11,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-13 19:58:11,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-07-13 19:58:11,101 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) [2021-07-13 19:58:11,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:58:11,124 INFO L93 Difference]: Finished difference Result 221 states and 426 transitions. [2021-07-13 19:58:11,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-13 19:58:11,124 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 [2021-07-13 19:58:11,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:58:11,125 INFO L225 Difference]: With dead ends: 221 [2021-07-13 19:58:11,125 INFO L226 Difference]: Without dead ends: 188 [2021-07-13 19:58:11,125 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.4ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-07-13 19:58:11,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-07-13 19:58:11,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 145. [2021-07-13 19:58:11,129 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) [2021-07-13 19:58:11,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 300 transitions. [2021-07-13 19:58:11,130 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 300 transitions. Word has length 26 [2021-07-13 19:58:11,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:58:11,130 INFO L482 AbstractCegarLoop]: Abstraction has 145 states and 300 transitions. [2021-07-13 19:58:11,130 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) [2021-07-13 19:58:11,130 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 300 transitions. [2021-07-13 19:58:11,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 19:58:11,131 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:58:11,131 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:58:11,349 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-07-13 19:58:11,349 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:58:11,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:58:11,350 INFO L82 PathProgramCache]: Analyzing trace with hash -1485197677, now seen corresponding path program 8 times [2021-07-13 19:58:11,350 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:58:11,350 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273393504] [2021-07-13 19:58:11,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:58:11,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:58:11,425 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:11,425 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:58:11,425 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273393504] [2021-07-13 19:58:11,425 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273393504] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:11,425 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [255147555] [2021-07-13 19:58:11,426 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 19:58:11,449 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:58:11,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:58:11,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:58:11,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:58:11,597 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:11,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [255147555] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:11,598 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:58:11,598 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2021-07-13 19:58:11,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941603565] [2021-07-13 19:58:11,598 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:58:11,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:58:11,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:58:11,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=365, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:58:11,599 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) [2021-07-13 19:58:12,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:58:12,347 INFO L93 Difference]: Finished difference Result 561 states and 1077 transitions. [2021-07-13 19:58:12,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-13 19:58:12,347 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 [2021-07-13 19:58:12,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:58:12,349 INFO L225 Difference]: With dead ends: 561 [2021-07-13 19:58:12,349 INFO L226 Difference]: Without dead ends: 495 [2021-07-13 19:58:12,350 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 706 ImplicationChecksByTransitivity, 619.2ms TimeCoverageRelationStatistics Valid=757, Invalid=2105, Unknown=0, NotChecked=0, Total=2862 [2021-07-13 19:58:12,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2021-07-13 19:58:12,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 114. [2021-07-13 19:58:12,354 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) [2021-07-13 19:58:12,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 225 transitions. [2021-07-13 19:58:12,355 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 225 transitions. Word has length 28 [2021-07-13 19:58:12,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:58:12,355 INFO L482 AbstractCegarLoop]: Abstraction has 114 states and 225 transitions. [2021-07-13 19:58:12,355 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) [2021-07-13 19:58:12,355 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 225 transitions. [2021-07-13 19:58:12,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 19:58:12,356 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:58:12,356 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:58:12,569 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:58:12,569 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:58:12,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:58:12,570 INFO L82 PathProgramCache]: Analyzing trace with hash 1081045901, now seen corresponding path program 9 times [2021-07-13 19:58:12,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:58:12,570 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556323784] [2021-07-13 19:58:12,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:58:12,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:58:12,621 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:12,621 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:58:12,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556323784] [2021-07-13 19:58:12,621 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556323784] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:12,622 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [242030837] [2021-07-13 19:58:12,622 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 [2021-07-13 19:58:12,662 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-07-13 19:58:12,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:58:12,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:58:12,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:58:12,802 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:12,802 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [242030837] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:12,802 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:58:12,803 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 17 [2021-07-13 19:58:12,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419859086] [2021-07-13 19:58:12,803 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:58:12,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:58:12,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:58:12,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:58:12,804 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) [2021-07-13 19:58:13,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:58:13,515 INFO L93 Difference]: Finished difference Result 351 states and 677 transitions. [2021-07-13 19:58:13,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-07-13 19:58:13,515 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 [2021-07-13 19:58:13,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:58:13,523 INFO L225 Difference]: With dead ends: 351 [2021-07-13 19:58:13,523 INFO L226 Difference]: Without dead ends: 347 [2021-07-13 19:58:13,524 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 682 ImplicationChecksByTransitivity, 614.4ms TimeCoverageRelationStatistics Valid=647, Invalid=1903, Unknown=0, NotChecked=0, Total=2550 [2021-07-13 19:58:13,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2021-07-13 19:58:13,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 102. [2021-07-13 19:58:13,534 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) [2021-07-13 19:58:13,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 202 transitions. [2021-07-13 19:58:13,535 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 202 transitions. Word has length 28 [2021-07-13 19:58:13,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:58:13,535 INFO L482 AbstractCegarLoop]: Abstraction has 102 states and 202 transitions. [2021-07-13 19:58:13,535 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) [2021-07-13 19:58:13,535 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 202 transitions. [2021-07-13 19:58:13,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:58:13,535 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:58:13,535 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:58:13,736 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:58:13,736 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:58:13,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:58:13,737 INFO L82 PathProgramCache]: Analyzing trace with hash 2026425425, now seen corresponding path program 10 times [2021-07-13 19:58:13,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:58:13,737 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868879985] [2021-07-13 19:58:13,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:58:13,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:58:13,831 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:13,831 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:58:13,831 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868879985] [2021-07-13 19:58:13,831 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868879985] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:13,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1254887160] [2021-07-13 19:58:13,832 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 [2021-07-13 19:58:13,857 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:58:13,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:58:13,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-13 19:58:13,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:58:13,903 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:13,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1254887160] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:13,903 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:58:13,903 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-07-13 19:58:13,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98013161] [2021-07-13 19:58:13,903 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 19:58:13,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:58:13,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 19:58:13,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:58:13,904 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) [2021-07-13 19:58:13,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:58:13,934 INFO L93 Difference]: Finished difference Result 280 states and 543 transitions. [2021-07-13 19:58:13,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:58:13,934 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 [2021-07-13 19:58:13,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:58:13,935 INFO L225 Difference]: With dead ends: 280 [2021-07-13 19:58:13,954 INFO L226 Difference]: Without dead ends: 241 [2021-07-13 19:58:13,954 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 22.3ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:58:13,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2021-07-13 19:58:13,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 185. [2021-07-13 19:58:13,958 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) [2021-07-13 19:58:13,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 387 transitions. [2021-07-13 19:58:13,958 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 387 transitions. Word has length 30 [2021-07-13 19:58:13,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:58:13,959 INFO L482 AbstractCegarLoop]: Abstraction has 185 states and 387 transitions. [2021-07-13 19:58:13,959 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) [2021-07-13 19:58:13,959 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 387 transitions. [2021-07-13 19:58:13,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-13 19:58:13,959 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:58:13,959 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:58:14,175 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-07-13 19:58:14,175 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:58:14,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:58:14,176 INFO L82 PathProgramCache]: Analyzing trace with hash 1274697551, now seen corresponding path program 11 times [2021-07-13 19:58:14,176 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:58:14,176 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097999288] [2021-07-13 19:58:14,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:58:14,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:58:14,279 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:14,279 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:58:14,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097999288] [2021-07-13 19:58:14,279 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1097999288] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:14,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1762007786] [2021-07-13 19:58:14,279 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 19:58:14,303 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-13 19:58:14,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:58:14,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-13 19:58:14,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:58:14,515 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:14,515 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1762007786] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:14,515 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:58:14,515 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 25 [2021-07-13 19:58:14,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208793015] [2021-07-13 19:58:14,516 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-13 19:58:14,516 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:58:14,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-13 19:58:14,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=519, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:58:14,516 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) [2021-07-13 19:58:15,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:58:15,416 INFO L93 Difference]: Finished difference Result 786 states and 1519 transitions. [2021-07-13 19:58:15,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-07-13 19:58:15,416 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 [2021-07-13 19:58:15,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:58:15,418 INFO L225 Difference]: With dead ends: 786 [2021-07-13 19:58:15,418 INFO L226 Difference]: Without dead ends: 678 [2021-07-13 19:58:15,420 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1341 ImplicationChecksByTransitivity, 844.4ms TimeCoverageRelationStatistics Valid=1299, Invalid=3671, Unknown=0, NotChecked=0, Total=4970 [2021-07-13 19:58:15,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 678 states. [2021-07-13 19:58:15,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 678 to 136. [2021-07-13 19:58:15,424 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) [2021-07-13 19:58:15,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 271 transitions. [2021-07-13 19:58:15,425 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 271 transitions. Word has length 32 [2021-07-13 19:58:15,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:58:15,425 INFO L482 AbstractCegarLoop]: Abstraction has 136 states and 271 transitions. [2021-07-13 19:58:15,425 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) [2021-07-13 19:58:15,425 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 271 transitions. [2021-07-13 19:58:15,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-13 19:58:15,425 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:58:15,425 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:58:15,641 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-07-13 19:58:15,641 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:58:15,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:58:15,641 INFO L82 PathProgramCache]: Analyzing trace with hash -1086729587, now seen corresponding path program 12 times [2021-07-13 19:58:15,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:58:15,641 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566360416] [2021-07-13 19:58:15,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:58:15,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:58:15,708 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 21 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:15,708 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:58:15,708 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566360416] [2021-07-13 19:58:15,708 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566360416] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:15,708 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [841516012] [2021-07-13 19:58:15,708 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 [2021-07-13 19:58:15,773 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-07-13 19:58:15,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:58:15,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-13 19:58:15,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:58:15,964 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 21 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:15,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [841516012] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:15,964 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:58:15,964 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13] total 20 [2021-07-13 19:58:15,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729033737] [2021-07-13 19:58:15,964 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:58:15,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:58:15,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:58:15,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=319, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:58:15,965 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) [2021-07-13 19:58:16,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:58:16,798 INFO L93 Difference]: Finished difference Result 485 states and 945 transitions. [2021-07-13 19:58:16,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-07-13 19:58:16,799 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 [2021-07-13 19:58:16,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:58:16,800 INFO L225 Difference]: With dead ends: 485 [2021-07-13 19:58:16,800 INFO L226 Difference]: Without dead ends: 481 [2021-07-13 19:58:16,801 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1312 ImplicationChecksByTransitivity, 782.1ms TimeCoverageRelationStatistics Valid=1088, Invalid=3334, Unknown=0, NotChecked=0, Total=4422 [2021-07-13 19:58:16,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 481 states. [2021-07-13 19:58:16,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 481 to 120. [2021-07-13 19:58:16,805 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) [2021-07-13 19:58:16,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 240 transitions. [2021-07-13 19:58:16,805 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 240 transitions. Word has length 32 [2021-07-13 19:58:16,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:58:16,805 INFO L482 AbstractCegarLoop]: Abstraction has 120 states and 240 transitions. [2021-07-13 19:58:16,805 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) [2021-07-13 19:58:16,805 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 240 transitions. [2021-07-13 19:58:16,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-07-13 19:58:16,806 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:58:16,806 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:58:17,021 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-07-13 19:58:17,021 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:58:17,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:58:17,022 INFO L82 PathProgramCache]: Analyzing trace with hash -4049395, now seen corresponding path program 13 times [2021-07-13 19:58:17,022 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:58:17,022 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196723293] [2021-07-13 19:58:17,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:58:17,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:58:17,067 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:17,067 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:58:17,068 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196723293] [2021-07-13 19:58:17,068 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196723293] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:17,068 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [161620145] [2021-07-13 19:58:17,068 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 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 [2021-07-13 19:58:17,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:58:17,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-13 19:58:17,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:58:17,159 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:17,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [161620145] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:17,159 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:58:17,159 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-07-13 19:58:17,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283665954] [2021-07-13 19:58:17,159 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 19:58:17,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:58:17,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 19:58:17,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-07-13 19:58:17,160 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) [2021-07-13 19:58:17,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:58:17,200 INFO L93 Difference]: Finished difference Result 339 states and 660 transitions. [2021-07-13 19:58:17,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-13 19:58:17,201 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 [2021-07-13 19:58:17,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:58:17,202 INFO L225 Difference]: With dead ends: 339 [2021-07-13 19:58:17,202 INFO L226 Difference]: Without dead ends: 294 [2021-07-13 19:58:17,202 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 28.9ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-07-13 19:58:17,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2021-07-13 19:58:17,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 225. [2021-07-13 19:58:17,206 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) [2021-07-13 19:58:17,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 474 transitions. [2021-07-13 19:58:17,207 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 474 transitions. Word has length 34 [2021-07-13 19:58:17,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:58:17,207 INFO L482 AbstractCegarLoop]: Abstraction has 225 states and 474 transitions. [2021-07-13 19:58:17,207 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) [2021-07-13 19:58:17,207 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 474 transitions. [2021-07-13 19:58:17,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 19:58:17,208 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:58:17,208 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:58:17,424 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:58:17,424 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:58:17,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:58:17,426 INFO L82 PathProgramCache]: Analyzing trace with hash 2031751691, now seen corresponding path program 14 times [2021-07-13 19:58:17,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:58:17,426 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315926908] [2021-07-13 19:58:17,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:58:17,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:58:17,554 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:17,554 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:58:17,554 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315926908] [2021-07-13 19:58:17,554 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315926908] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:17,554 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [82452947] [2021-07-13 19:58:17,555 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 [2021-07-13 19:58:17,582 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:58:17,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:58:17,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:58:17,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:58:17,840 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:17,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [82452947] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:17,841 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:58:17,841 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 29 [2021-07-13 19:58:17,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809213862] [2021-07-13 19:58:17,841 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-07-13 19:58:17,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:58:17,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-07-13 19:58:17,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=700, Unknown=0, NotChecked=0, Total=870 [2021-07-13 19:58:17,842 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) [2021-07-13 19:58:19,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:58:19,113 INFO L93 Difference]: Finished difference Result 1039 states and 2017 transitions. [2021-07-13 19:58:19,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-07-13 19:58:19,114 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 [2021-07-13 19:58:19,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:58:19,116 INFO L225 Difference]: With dead ends: 1039 [2021-07-13 19:58:19,116 INFO L226 Difference]: Without dead ends: 883 [2021-07-13 19:58:19,118 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2332 ImplicationChecksByTransitivity, 1178.6ms TimeCoverageRelationStatistics Valid=2085, Invalid=5925, Unknown=0, NotChecked=0, Total=8010 [2021-07-13 19:58:19,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 883 states. [2021-07-13 19:58:19,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 883 to 158. [2021-07-13 19:58:19,123 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) [2021-07-13 19:58:19,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 317 transitions. [2021-07-13 19:58:19,124 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 317 transitions. Word has length 36 [2021-07-13 19:58:19,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:58:19,124 INFO L482 AbstractCegarLoop]: Abstraction has 158 states and 317 transitions. [2021-07-13 19:58:19,124 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) [2021-07-13 19:58:19,124 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 317 transitions. [2021-07-13 19:58:19,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 19:58:19,124 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:58:19,124 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:58:19,343 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-07-13 19:58:19,343 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:58:19,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:58:19,343 INFO L82 PathProgramCache]: Analyzing trace with hash 1527693965, now seen corresponding path program 15 times [2021-07-13 19:58:19,343 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:58:19,344 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477322825] [2021-07-13 19:58:19,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:58:19,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:58:19,414 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 31 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:19,414 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:58:19,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477322825] [2021-07-13 19:58:19,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477322825] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:19,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2016164789] [2021-07-13 19:58:19,414 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 [2021-07-13 19:58:19,440 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-07-13 19:58:19,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:58:19,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:58:19,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:58:19,673 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 31 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:19,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2016164789] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:19,673 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:58:19,673 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15] total 23 [2021-07-13 19:58:19,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371054219] [2021-07-13 19:58:19,674 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 19:58:19,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:58:19,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 19:58:19,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=424, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:58:19,674 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) [2021-07-13 19:58:20,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:58:20,858 INFO L93 Difference]: Finished difference Result 641 states and 1257 transitions. [2021-07-13 19:58:20,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-07-13 19:58:20,859 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 [2021-07-13 19:58:20,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:58:20,861 INFO L225 Difference]: With dead ends: 641 [2021-07-13 19:58:20,861 INFO L226 Difference]: Without dead ends: 637 [2021-07-13 19:58:20,862 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2300 ImplicationChecksByTransitivity, 1107.3ms TimeCoverageRelationStatistics Valid=1724, Invalid=5416, Unknown=0, NotChecked=0, Total=7140 [2021-07-13 19:58:20,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 637 states. [2021-07-13 19:58:20,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 637 to 138. [2021-07-13 19:58:20,866 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) [2021-07-13 19:58:20,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 278 transitions. [2021-07-13 19:58:20,867 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 278 transitions. Word has length 36 [2021-07-13 19:58:20,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:58:20,867 INFO L482 AbstractCegarLoop]: Abstraction has 138 states and 278 transitions. [2021-07-13 19:58:20,867 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) [2021-07-13 19:58:20,867 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 278 transitions. [2021-07-13 19:58:20,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-07-13 19:58:20,867 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:58:20,867 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:58:21,084 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-07-13 19:58:21,084 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:58:21,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:58:21,084 INFO L82 PathProgramCache]: Analyzing trace with hash 1675506121, now seen corresponding path program 16 times [2021-07-13 19:58:21,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:58:21,084 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736025842] [2021-07-13 19:58:21,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:58:21,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:58:21,159 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:21,159 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:58:21,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736025842] [2021-07-13 19:58:21,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736025842] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:21,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201556700] [2021-07-13 19:58:21,159 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-07-13 19:58:21,221 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:58:21,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:58:21,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 19:58:21,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:58:21,270 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:21,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1201556700] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:21,270 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:58:21,271 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-07-13 19:58:21,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427164118] [2021-07-13 19:58:21,272 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 19:58:21,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:58:21,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 19:58:21,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:58:21,272 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) [2021-07-13 19:58:21,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:58:21,332 INFO L93 Difference]: Finished difference Result 398 states and 777 transitions. [2021-07-13 19:58:21,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:58:21,333 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 [2021-07-13 19:58:21,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:58:21,334 INFO L225 Difference]: With dead ends: 398 [2021-07-13 19:58:21,334 INFO L226 Difference]: Without dead ends: 347 [2021-07-13 19:58:21,334 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 34.8ms TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:58:21,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2021-07-13 19:58:21,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 265. [2021-07-13 19:58:21,342 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) [2021-07-13 19:58:21,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 561 transitions. [2021-07-13 19:58:21,343 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 561 transitions. Word has length 38 [2021-07-13 19:58:21,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:58:21,343 INFO L482 AbstractCegarLoop]: Abstraction has 265 states and 561 transitions. [2021-07-13 19:58:21,343 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) [2021-07-13 19:58:21,343 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 561 transitions. [2021-07-13 19:58:21,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-13 19:58:21,343 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:58:21,343 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:58:21,561 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:58:21,561 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:58:21,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:58:21,562 INFO L82 PathProgramCache]: Analyzing trace with hash 1976295111, now seen corresponding path program 17 times [2021-07-13 19:58:21,562 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:58:21,562 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524223332] [2021-07-13 19:58:21,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:58:21,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:58:21,711 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 36 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:21,712 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:58:21,712 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524223332] [2021-07-13 19:58:21,712 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524223332] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:21,712 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229292719] [2021-07-13 19:58:21,712 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 [2021-07-13 19:58:21,737 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-07-13 19:58:21,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:58:21,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 19:58:21,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:58:22,026 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 36 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:22,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [229292719] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:22,027 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:58:22,027 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 33 [2021-07-13 19:58:22,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297562091] [2021-07-13 19:58:22,027 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-07-13 19:58:22,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:58:22,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-07-13 19:58:22,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=908, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 19:58:22,028 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) [2021-07-13 19:58:23,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:58:23,765 INFO L93 Difference]: Finished difference Result 1320 states and 2571 transitions. [2021-07-13 19:58:23,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-07-13 19:58:23,765 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 [2021-07-13 19:58:23,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:58:23,768 INFO L225 Difference]: With dead ends: 1320 [2021-07-13 19:58:23,768 INFO L226 Difference]: Without dead ends: 1110 [2021-07-13 19:58:23,771 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3798 ImplicationChecksByTransitivity, 1551.4ms TimeCoverageRelationStatistics Valid=3180, Invalid=9030, Unknown=0, NotChecked=0, Total=12210 [2021-07-13 19:58:23,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1110 states. [2021-07-13 19:58:23,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1110 to 180. [2021-07-13 19:58:23,776 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) [2021-07-13 19:58:23,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 363 transitions. [2021-07-13 19:58:23,777 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 363 transitions. Word has length 40 [2021-07-13 19:58:23,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:58:23,777 INFO L482 AbstractCegarLoop]: Abstraction has 180 states and 363 transitions. [2021-07-13 19:58:23,777 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) [2021-07-13 19:58:23,777 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 363 transitions. [2021-07-13 19:58:23,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-13 19:58:23,777 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:58:23,777 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:58:23,978 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:58:23,978 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:58:23,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:58:23,978 INFO L82 PathProgramCache]: Analyzing trace with hash -302152819, now seen corresponding path program 18 times [2021-07-13 19:58:23,978 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:58:23,978 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413764637] [2021-07-13 19:58:23,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:58:23,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:58:24,056 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 43 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:24,056 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:58:24,056 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413764637] [2021-07-13 19:58:24,056 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [413764637] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:24,056 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1607985649] [2021-07-13 19:58:24,056 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 [2021-07-13 19:58:24,096 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-07-13 19:58:24,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:58:24,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 19:58:24,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:58:24,353 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 43 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:24,353 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1607985649] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:24,353 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:58:24,353 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 17] total 26 [2021-07-13 19:58:24,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397624232] [2021-07-13 19:58:24,355 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-13 19:58:24,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:58:24,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-13 19:58:24,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=544, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:58:24,355 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) [2021-07-13 19:58:25,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:58:25,992 INFO L93 Difference]: Finished difference Result 819 states and 1613 transitions. [2021-07-13 19:58:25,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-07-13 19:58:25,993 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 [2021-07-13 19:58:25,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:58:25,995 INFO L225 Difference]: With dead ends: 819 [2021-07-13 19:58:25,995 INFO L226 Difference]: Without dead ends: 815 [2021-07-13 19:58:25,997 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3762 ImplicationChecksByTransitivity, 1521.6ms TimeCoverageRelationStatistics Valid=2606, Invalid=8314, Unknown=0, NotChecked=0, Total=10920 [2021-07-13 19:58:25,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 815 states. [2021-07-13 19:58:26,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 815 to 156. [2021-07-13 19:58:26,001 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) [2021-07-13 19:58:26,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 316 transitions. [2021-07-13 19:58:26,001 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 316 transitions. Word has length 40 [2021-07-13 19:58:26,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:58:26,001 INFO L482 AbstractCegarLoop]: Abstraction has 156 states and 316 transitions. [2021-07-13 19:58:26,002 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) [2021-07-13 19:58:26,002 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 316 transitions. [2021-07-13 19:58:26,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-07-13 19:58:26,002 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:58:26,002 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:58:26,218 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:58:26,218 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:58:26,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:58:26,219 INFO L82 PathProgramCache]: Analyzing trace with hash -78659707, now seen corresponding path program 19 times [2021-07-13 19:58:26,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:58:26,219 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660462586] [2021-07-13 19:58:26,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:58:26,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:58:26,290 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:26,291 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:58:26,291 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660462586] [2021-07-13 19:58:26,291 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660462586] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:26,291 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1592046302] [2021-07-13 19:58:26,291 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 [2021-07-13 19:58:26,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:58:26,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:58:26,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:58:26,365 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:26,365 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1592046302] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:26,365 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:58:26,365 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-07-13 19:58:26,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124845649] [2021-07-13 19:58:26,365 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:58:26,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:58:26,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:58:26,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:58:26,366 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) [2021-07-13 19:58:26,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:58:26,435 INFO L93 Difference]: Finished difference Result 457 states and 894 transitions. [2021-07-13 19:58:26,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:58:26,436 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 [2021-07-13 19:58:26,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:58:26,437 INFO L225 Difference]: With dead ends: 457 [2021-07-13 19:58:26,437 INFO L226 Difference]: Without dead ends: 400 [2021-07-13 19:58:26,437 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 42.7ms TimeCoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:58:26,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2021-07-13 19:58:26,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 305. [2021-07-13 19:58:26,441 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) [2021-07-13 19:58:26,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 648 transitions. [2021-07-13 19:58:26,441 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 648 transitions. Word has length 42 [2021-07-13 19:58:26,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:58:26,441 INFO L482 AbstractCegarLoop]: Abstraction has 305 states and 648 transitions. [2021-07-13 19:58:26,441 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) [2021-07-13 19:58:26,441 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 648 transitions. [2021-07-13 19:58:26,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-07-13 19:58:26,442 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:58:26,442 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:58:26,658 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-07-13 19:58:26,658 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:58:26,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:58:26,658 INFO L82 PathProgramCache]: Analyzing trace with hash -729629309, now seen corresponding path program 20 times [2021-07-13 19:58:26,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:58:26,659 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50879054] [2021-07-13 19:58:26,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:58:26,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:58:26,850 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 49 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:26,850 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:58:26,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50879054] [2021-07-13 19:58:26,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50879054] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:26,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1422698428] [2021-07-13 19:58:26,851 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 [2021-07-13 19:58:26,876 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:58:26,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:58:26,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-13 19:58:26,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:58:27,246 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 49 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:27,246 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1422698428] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:27,247 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:58:27,247 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 37 [2021-07-13 19:58:27,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494026545] [2021-07-13 19:58:27,247 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-07-13 19:58:27,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:58:27,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-07-13 19:58:27,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=263, Invalid=1143, Unknown=0, NotChecked=0, Total=1406 [2021-07-13 19:58:27,248 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) [2021-07-13 19:58:29,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:58:29,637 INFO L93 Difference]: Finished difference Result 1629 states and 3181 transitions. [2021-07-13 19:58:29,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2021-07-13 19:58:29,637 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 [2021-07-13 19:58:29,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:58:29,641 INFO L225 Difference]: With dead ends: 1629 [2021-07-13 19:58:29,641 INFO L226 Difference]: Without dead ends: 1359 [2021-07-13 19:58:29,642 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5875 ImplicationChecksByTransitivity, 2219.5ms TimeCoverageRelationStatistics Valid=4657, Invalid=13165, Unknown=0, NotChecked=0, Total=17822 [2021-07-13 19:58:29,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1359 states. [2021-07-13 19:58:29,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1359 to 202. [2021-07-13 19:58:29,652 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) [2021-07-13 19:58:29,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 409 transitions. [2021-07-13 19:58:29,652 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 409 transitions. Word has length 44 [2021-07-13 19:58:29,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:58:29,652 INFO L482 AbstractCegarLoop]: Abstraction has 202 states and 409 transitions. [2021-07-13 19:58:29,652 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) [2021-07-13 19:58:29,652 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 409 transitions. [2021-07-13 19:58:29,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-07-13 19:58:29,653 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:58:29,653 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:58:29,869 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-07-13 19:58:29,869 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:58:29,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:58:29,869 INFO L82 PathProgramCache]: Analyzing trace with hash 1199920525, now seen corresponding path program 21 times [2021-07-13 19:58:29,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:58:29,869 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249489851] [2021-07-13 19:58:29,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:58:29,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:58:29,947 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 57 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:29,948 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:58:29,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249489851] [2021-07-13 19:58:29,948 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249489851] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:29,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1617067234] [2021-07-13 19:58:29,948 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 19:58:29,976 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-07-13 19:58:29,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:58:29,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-13 19:58:29,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:58:30,333 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 57 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:30,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1617067234] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:30,334 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:58:30,334 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 19] total 29 [2021-07-13 19:58:30,334 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648435881] [2021-07-13 19:58:30,335 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-07-13 19:58:30,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:58:30,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-07-13 19:58:30,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=679, Unknown=0, NotChecked=0, Total=870 [2021-07-13 19:58:30,335 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) [2021-07-13 19:58:32,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:58:32,363 INFO L93 Difference]: Finished difference Result 1019 states and 2013 transitions. [2021-07-13 19:58:32,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2021-07-13 19:58:32,363 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 [2021-07-13 19:58:32,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:58:32,366 INFO L225 Difference]: With dead ends: 1019 [2021-07-13 19:58:32,366 INFO L226 Difference]: Without dead ends: 1015 [2021-07-13 19:58:32,367 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5830 ImplicationChecksByTransitivity, 1939.2ms TimeCoverageRelationStatistics Valid=3791, Invalid=12211, Unknown=0, NotChecked=0, Total=16002 [2021-07-13 19:58:32,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1015 states. [2021-07-13 19:58:32,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1015 to 174. [2021-07-13 19:58:32,371 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) [2021-07-13 19:58:32,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 354 transitions. [2021-07-13 19:58:32,371 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 354 transitions. Word has length 44 [2021-07-13 19:58:32,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:58:32,372 INFO L482 AbstractCegarLoop]: Abstraction has 174 states and 354 transitions. [2021-07-13 19:58:32,372 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) [2021-07-13 19:58:32,372 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 354 transitions. [2021-07-13 19:58:32,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-07-13 19:58:32,372 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:58:32,372 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:58:32,572 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:58:32,573 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:58:32,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:58:32,573 INFO L82 PathProgramCache]: Analyzing trace with hash -2016813247, now seen corresponding path program 22 times [2021-07-13 19:58:32,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:58:32,573 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798982677] [2021-07-13 19:58:32,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:58:32,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:58:32,646 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:32,647 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:58:32,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798982677] [2021-07-13 19:58:32,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [798982677] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:32,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [845869780] [2021-07-13 19:58:32,647 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 19:58:32,673 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:58:32,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:58:32,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 35 conjunts are in the unsatisfiable core [2021-07-13 19:58:32,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:58:32,725 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:32,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [845869780] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:32,725 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:58:32,725 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-07-13 19:58:32,726 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199495087] [2021-07-13 19:58:32,726 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:58:32,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:58:32,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:58:32,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:58:32,726 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) [2021-07-13 19:58:32,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:58:32,812 INFO L93 Difference]: Finished difference Result 516 states and 1011 transitions. [2021-07-13 19:58:32,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:58:32,813 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 [2021-07-13 19:58:32,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:58:32,814 INFO L225 Difference]: With dead ends: 516 [2021-07-13 19:58:32,815 INFO L226 Difference]: Without dead ends: 453 [2021-07-13 19:58:32,815 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 51.7ms TimeCoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:58:32,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2021-07-13 19:58:32,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 345. [2021-07-13 19:58:32,818 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) [2021-07-13 19:58:32,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 735 transitions. [2021-07-13 19:58:32,819 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 735 transitions. Word has length 46 [2021-07-13 19:58:32,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:58:32,819 INFO L482 AbstractCegarLoop]: Abstraction has 345 states and 735 transitions. [2021-07-13 19:58:32,819 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) [2021-07-13 19:58:32,819 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 735 transitions. [2021-07-13 19:58:32,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-07-13 19:58:32,820 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:58:32,820 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:58:33,035 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-07-13 19:58:33,036 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:58:33,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:58:33,036 INFO L82 PathProgramCache]: Analyzing trace with hash 1932635711, now seen corresponding path program 23 times [2021-07-13 19:58:33,036 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:58:33,036 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691093728] [2021-07-13 19:58:33,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:58:33,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:58:33,227 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 64 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:33,228 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:58:33,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691093728] [2021-07-13 19:58:33,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691093728] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:33,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1244210209] [2021-07-13 19:58:33,228 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 19:58:33,307 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-07-13 19:58:33,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:58:33,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:58:33,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:58:33,737 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 64 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:33,737 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1244210209] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:33,737 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:58:33,737 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 41 [2021-07-13 19:58:33,737 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170644382] [2021-07-13 19:58:33,737 INFO L462 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-07-13 19:58:33,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:58:33,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-07-13 19:58:33,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=317, Invalid=1405, Unknown=0, NotChecked=0, Total=1722 [2021-07-13 19:58:33,738 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) [2021-07-13 19:58:36,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:58:36,598 INFO L93 Difference]: Finished difference Result 1966 states and 3847 transitions. [2021-07-13 19:58:36,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2021-07-13 19:58:36,599 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 [2021-07-13 19:58:36,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:58:36,603 INFO L225 Difference]: With dead ends: 1966 [2021-07-13 19:58:36,603 INFO L226 Difference]: Without dead ends: 1630 [2021-07-13 19:58:36,604 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8718 ImplicationChecksByTransitivity, 2631.9ms TimeCoverageRelationStatistics Valid=6597, Invalid=18525, Unknown=0, NotChecked=0, Total=25122 [2021-07-13 19:58:36,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1630 states. [2021-07-13 19:58:36,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1630 to 224. [2021-07-13 19:58:36,610 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) [2021-07-13 19:58:36,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 455 transitions. [2021-07-13 19:58:36,611 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 455 transitions. Word has length 48 [2021-07-13 19:58:36,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:58:36,611 INFO L482 AbstractCegarLoop]: Abstraction has 224 states and 455 transitions. [2021-07-13 19:58:36,611 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) [2021-07-13 19:58:36,611 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 455 transitions. [2021-07-13 19:58:36,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-07-13 19:58:36,611 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:58:36,611 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:58:36,827 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:58:36,827 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:58:36,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:58:36,827 INFO L82 PathProgramCache]: Analyzing trace with hash 1888843917, now seen corresponding path program 24 times [2021-07-13 19:58:36,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:58:36,828 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374100960] [2021-07-13 19:58:36,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:58:36,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:58:36,913 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 73 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:36,913 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:58:36,913 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374100960] [2021-07-13 19:58:36,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374100960] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:36,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1282572077] [2021-07-13 19:58:36,914 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 [2021-07-13 19:58:36,944 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-07-13 19:58:36,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:58:36,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:58:36,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:58:37,312 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 73 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:37,312 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1282572077] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:37,312 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:58:37,312 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 21] total 32 [2021-07-13 19:58:37,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173613321] [2021-07-13 19:58:37,312 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-07-13 19:58:37,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:58:37,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-07-13 19:58:37,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=829, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 19:58:37,313 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) [2021-07-13 19:58:39,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:58:39,810 INFO L93 Difference]: Finished difference Result 1241 states and 2457 transitions. [2021-07-13 19:58:39,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2021-07-13 19:58:39,810 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 [2021-07-13 19:58:39,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:58:39,814 INFO L225 Difference]: With dead ends: 1241 [2021-07-13 19:58:39,814 INFO L226 Difference]: Without dead ends: 1237 [2021-07-13 19:58:39,815 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8653 ImplicationChecksByTransitivity, 2339.4ms TimeCoverageRelationStatistics Valid=5342, Invalid=17308, Unknown=0, NotChecked=0, Total=22650 [2021-07-13 19:58:39,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1237 states. [2021-07-13 19:58:39,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1237 to 192. [2021-07-13 19:58:39,821 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) [2021-07-13 19:58:39,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 392 transitions. [2021-07-13 19:58:39,821 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 392 transitions. Word has length 48 [2021-07-13 19:58:39,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:58:39,821 INFO L482 AbstractCegarLoop]: Abstraction has 192 states and 392 transitions. [2021-07-13 19:58:39,821 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) [2021-07-13 19:58:39,821 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 392 transitions. [2021-07-13 19:58:39,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-07-13 19:58:39,822 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:58:39,822 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:58:40,036 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-07-13 19:58:40,037 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:58:40,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:58:40,037 INFO L82 PathProgramCache]: Analyzing trace with hash 914329853, now seen corresponding path program 25 times [2021-07-13 19:58:40,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:58:40,037 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154632812] [2021-07-13 19:58:40,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:58:40,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:58:40,108 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:40,108 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:58:40,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154632812] [2021-07-13 19:58:40,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154632812] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:40,109 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489072955] [2021-07-13 19:58:40,109 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 [2021-07-13 19:58:40,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:58:40,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 39 conjunts are in the unsatisfiable core [2021-07-13 19:58:40,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:58:40,205 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:40,205 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [489072955] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:40,205 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:58:40,205 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-07-13 19:58:40,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341435166] [2021-07-13 19:58:40,206 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:58:40,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:58:40,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:58:40,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:58:40,207 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) [2021-07-13 19:58:40,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:58:40,297 INFO L93 Difference]: Finished difference Result 575 states and 1128 transitions. [2021-07-13 19:58:40,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:58:40,297 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 [2021-07-13 19:58:40,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:58:40,298 INFO L225 Difference]: With dead ends: 575 [2021-07-13 19:58:40,298 INFO L226 Difference]: Without dead ends: 506 [2021-07-13 19:58:40,299 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 58 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 48.6ms TimeCoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:58:40,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2021-07-13 19:58:40,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 385. [2021-07-13 19:58:40,305 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) [2021-07-13 19:58:40,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 822 transitions. [2021-07-13 19:58:40,305 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 822 transitions. Word has length 50 [2021-07-13 19:58:40,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:58:40,305 INFO L482 AbstractCegarLoop]: Abstraction has 385 states and 822 transitions. [2021-07-13 19:58:40,305 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) [2021-07-13 19:58:40,306 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 822 transitions. [2021-07-13 19:58:40,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-07-13 19:58:40,307 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:58:40,307 INFO L508 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:58:40,520 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-07-13 19:58:40,520 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:58:40,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:58:40,520 INFO L82 PathProgramCache]: Analyzing trace with hash 2068558075, now seen corresponding path program 26 times [2021-07-13 19:58:40,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:58:40,520 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883947470] [2021-07-13 19:58:40,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:58:40,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:58:40,780 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 81 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:40,780 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:58:40,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883947470] [2021-07-13 19:58:40,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883947470] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:40,781 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205846759] [2021-07-13 19:58:40,781 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 [2021-07-13 19:58:40,808 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:58:40,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:58:40,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-13 19:58:40,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:58:41,317 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 81 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:41,318 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [205846759] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:41,318 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:58:41,318 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23] total 45 [2021-07-13 19:58:41,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314780022] [2021-07-13 19:58:41,318 INFO L462 AbstractCegarLoop]: Interpolant automaton has 46 states [2021-07-13 19:58:41,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:58:41,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-07-13 19:58:41,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=376, Invalid=1694, Unknown=0, NotChecked=0, Total=2070 [2021-07-13 19:58:41,319 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) [2021-07-13 19:58:45,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:58:45,274 INFO L93 Difference]: Finished difference Result 2331 states and 4569 transitions. [2021-07-13 19:58:45,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 144 states. [2021-07-13 19:58:45,274 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 [2021-07-13 19:58:45,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:58:45,279 INFO L225 Difference]: With dead ends: 2331 [2021-07-13 19:58:45,279 INFO L226 Difference]: Without dead ends: 1923 [2021-07-13 19:58:45,280 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 184 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12499 ImplicationChecksByTransitivity, 3591.0ms TimeCoverageRelationStatistics Valid=9089, Invalid=25321, Unknown=0, NotChecked=0, Total=34410 [2021-07-13 19:58:45,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1923 states. [2021-07-13 19:58:45,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1923 to 246. [2021-07-13 19:58:45,287 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) [2021-07-13 19:58:45,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 501 transitions. [2021-07-13 19:58:45,288 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 501 transitions. Word has length 52 [2021-07-13 19:58:45,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:58:45,288 INFO L482 AbstractCegarLoop]: Abstraction has 246 states and 501 transitions. [2021-07-13 19:58:45,288 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) [2021-07-13 19:58:45,288 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 501 transitions. [2021-07-13 19:58:45,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-07-13 19:58:45,288 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:58:45,288 INFO L508 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:58:45,504 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-07-13 19:58:45,504 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:58:45,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:58:45,504 INFO L82 PathProgramCache]: Analyzing trace with hash -275960691, now seen corresponding path program 27 times [2021-07-13 19:58:45,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:58:45,504 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283221413] [2021-07-13 19:58:45,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:58:45,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:58:45,615 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 91 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:45,615 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:58:45,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283221413] [2021-07-13 19:58:45,615 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283221413] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:45,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2011246521] [2021-07-13 19:58:45,615 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 [2021-07-13 19:58:45,689 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-07-13 19:58:45,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:58:45,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-13 19:58:45,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:58:46,142 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 91 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:46,142 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2011246521] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:46,142 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:58:46,142 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 23] total 35 [2021-07-13 19:58:46,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751080030] [2021-07-13 19:58:46,143 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-07-13 19:58:46,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:58:46,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-07-13 19:58:46,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=266, Invalid=994, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 19:58:46,144 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) [2021-07-13 19:58:49,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:58:49,554 INFO L93 Difference]: Finished difference Result 1485 states and 2945 transitions. [2021-07-13 19:58:49,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 145 states. [2021-07-13 19:58:49,555 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 [2021-07-13 19:58:49,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:58:49,558 INFO L225 Difference]: With dead ends: 1485 [2021-07-13 19:58:49,558 INFO L226 Difference]: Without dead ends: 1481 [2021-07-13 19:58:49,560 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12396 ImplicationChecksByTransitivity, 3277.3ms TimeCoverageRelationStatistics Valid=7328, Invalid=23824, Unknown=0, NotChecked=0, Total=31152 [2021-07-13 19:58:49,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1481 states. [2021-07-13 19:58:49,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1481 to 210. [2021-07-13 19:58:49,565 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) [2021-07-13 19:58:49,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 430 transitions. [2021-07-13 19:58:49,565 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 430 transitions. Word has length 52 [2021-07-13 19:58:49,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:58:49,566 INFO L482 AbstractCegarLoop]: Abstraction has 210 states and 430 transitions. [2021-07-13 19:58:49,566 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) [2021-07-13 19:58:49,566 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 430 transitions. [2021-07-13 19:58:49,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-07-13 19:58:49,566 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:58:49,566 INFO L508 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:58:49,781 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:58:49,782 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:58:49,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:58:49,782 INFO L82 PathProgramCache]: Analyzing trace with hash -1608264519, now seen corresponding path program 28 times [2021-07-13 19:58:49,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:58:49,782 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792919538] [2021-07-13 19:58:49,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:58:49,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:58:49,895 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:49,895 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:58:49,895 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792919538] [2021-07-13 19:58:49,895 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792919538] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:49,895 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [908533432] [2021-07-13 19:58:49,895 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 [2021-07-13 19:58:49,961 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:58:49,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:58:49,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-13 19:58:49,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:58:50,023 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:50,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [908533432] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:50,023 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:58:50,023 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-07-13 19:58:50,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355642603] [2021-07-13 19:58:50,023 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:58:50,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:58:50,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:58:50,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:58:50,024 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) [2021-07-13 19:58:50,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:58:50,158 INFO L93 Difference]: Finished difference Result 634 states and 1245 transitions. [2021-07-13 19:58:50,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:58:50,158 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 [2021-07-13 19:58:50,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:58:50,160 INFO L225 Difference]: With dead ends: 634 [2021-07-13 19:58:50,160 INFO L226 Difference]: Without dead ends: 559 [2021-07-13 19:58:50,160 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 63 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 73.0ms TimeCoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:58:50,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 559 states. [2021-07-13 19:58:50,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 559 to 425. [2021-07-13 19:58:50,164 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) [2021-07-13 19:58:50,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 425 states to 425 states and 909 transitions. [2021-07-13 19:58:50,165 INFO L78 Accepts]: Start accepts. Automaton has 425 states and 909 transitions. Word has length 54 [2021-07-13 19:58:50,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:58:50,165 INFO L482 AbstractCegarLoop]: Abstraction has 425 states and 909 transitions. [2021-07-13 19:58:50,165 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) [2021-07-13 19:58:50,165 INFO L276 IsEmpty]: Start isEmpty. Operand 425 states and 909 transitions. [2021-07-13 19:58:50,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-07-13 19:58:50,166 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:58:50,166 INFO L508 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:58:50,382 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-07-13 19:58:50,382 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:58:50,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:58:50,383 INFO L82 PathProgramCache]: Analyzing trace with hash 1640220087, now seen corresponding path program 29 times [2021-07-13 19:58:50,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:58:50,383 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949827285] [2021-07-13 19:58:50,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:58:50,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:58:50,644 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 100 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:50,645 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:58:50,645 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949827285] [2021-07-13 19:58:50,645 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949827285] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:50,645 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [821920206] [2021-07-13 19:58:50,645 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 [2021-07-13 19:58:50,676 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-07-13 19:58:50,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:58:50,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:58:50,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:58:51,144 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 100 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:51,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [821920206] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:51,145 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:58:51,145 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25] total 49 [2021-07-13 19:58:51,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977632071] [2021-07-13 19:58:51,145 INFO L462 AbstractCegarLoop]: Interpolant automaton has 50 states [2021-07-13 19:58:51,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:58:51,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-07-13 19:58:51,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=440, Invalid=2010, Unknown=0, NotChecked=0, Total=2450 [2021-07-13 19:58:51,146 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) [2021-07-13 19:58:55,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:58:55,779 INFO L93 Difference]: Finished difference Result 2724 states and 5347 transitions. [2021-07-13 19:58:55,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 169 states. [2021-07-13 19:58:55,780 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 [2021-07-13 19:58:55,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:58:55,785 INFO L225 Difference]: With dead ends: 2724 [2021-07-13 19:58:55,786 INFO L226 Difference]: Without dead ends: 2238 [2021-07-13 19:58:55,787 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 213 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17409 ImplicationChecksByTransitivity, 4148.0ms TimeCoverageRelationStatistics Valid=12230, Invalid=33780, Unknown=0, NotChecked=0, Total=46010 [2021-07-13 19:58:55,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2238 states. [2021-07-13 19:58:55,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2238 to 268. [2021-07-13 19:58:55,795 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) [2021-07-13 19:58:55,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 547 transitions. [2021-07-13 19:58:55,796 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 547 transitions. Word has length 56 [2021-07-13 19:58:55,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:58:55,796 INFO L482 AbstractCegarLoop]: Abstraction has 268 states and 547 transitions. [2021-07-13 19:58:55,796 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) [2021-07-13 19:58:55,796 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 547 transitions. [2021-07-13 19:58:55,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-07-13 19:58:55,797 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:58:55,797 INFO L508 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:58:56,012 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:58:56,012 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:58:56,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:58:56,013 INFO L82 PathProgramCache]: Analyzing trace with hash 205238669, now seen corresponding path program 30 times [2021-07-13 19:58:56,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:58:56,013 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677021596] [2021-07-13 19:58:56,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:58:56,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:58:56,138 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 111 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:56,138 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:58:56,138 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677021596] [2021-07-13 19:58:56,138 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677021596] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:56,138 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [305093244] [2021-07-13 19:58:56,138 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 [2021-07-13 19:58:56,226 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2021-07-13 19:58:56,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:58:56,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:58:56,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:58:56,734 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 111 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:56,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [305093244] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:56,735 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:58:56,735 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 25] total 38 [2021-07-13 19:58:56,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583334816] [2021-07-13 19:58:56,735 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-13 19:58:56,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:58:56,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-13 19:58:56,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=308, Invalid=1174, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 19:58:56,736 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) [2021-07-13 19:59:00,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:59:00,650 INFO L93 Difference]: Finished difference Result 1751 states and 3477 transitions. [2021-07-13 19:59:00,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 170 states. [2021-07-13 19:59:00,651 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 [2021-07-13 19:59:00,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:59:00,654 INFO L225 Difference]: With dead ends: 1751 [2021-07-13 19:59:00,654 INFO L226 Difference]: Without dead ends: 1747 [2021-07-13 19:59:00,656 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 203 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17241 ImplicationChecksByTransitivity, 3742.3ms TimeCoverageRelationStatistics Valid=9824, Invalid=31996, Unknown=0, NotChecked=0, Total=41820 [2021-07-13 19:59:00,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1747 states. [2021-07-13 19:59:00,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1747 to 228. [2021-07-13 19:59:00,662 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) [2021-07-13 19:59:00,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 468 transitions. [2021-07-13 19:59:00,662 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 468 transitions. Word has length 56 [2021-07-13 19:59:00,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:59:00,662 INFO L482 AbstractCegarLoop]: Abstraction has 228 states and 468 transitions. [2021-07-13 19:59:00,662 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) [2021-07-13 19:59:00,662 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 468 transitions. [2021-07-13 19:59:00,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-07-13 19:59:00,663 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:59:00,663 INFO L508 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:59:00,872 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-07-13 19:59:00,872 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:59:00,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:59:00,873 INFO L82 PathProgramCache]: Analyzing trace with hash -924210571, now seen corresponding path program 31 times [2021-07-13 19:59:00,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:59:00,873 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558706144] [2021-07-13 19:59:00,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:59:00,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:59:00,995 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 0 proven. 242 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:00,995 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:59:00,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558706144] [2021-07-13 19:59:00,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558706144] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:00,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [780912071] [2021-07-13 19:59:00,995 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) [2021-07-13 19:59:01,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:59:01,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-13 19:59:01,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:59:01,105 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 0 proven. 242 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:01,105 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [780912071] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:01,105 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:59:01,105 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-07-13 19:59:01,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699703395] [2021-07-13 19:59:01,106 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:59:01,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:59:01,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:59:01,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:59:01,106 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) [2021-07-13 19:59:01,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:59:01,265 INFO L93 Difference]: Finished difference Result 693 states and 1362 transitions. [2021-07-13 19:59:01,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:59:01,265 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 [2021-07-13 19:59:01,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:59:01,267 INFO L225 Difference]: With dead ends: 693 [2021-07-13 19:59:01,267 INFO L226 Difference]: Without dead ends: 612 [2021-07-13 19:59:01,267 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 68 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 83.6ms TimeCoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:59:01,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 612 states. [2021-07-13 19:59:01,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 612 to 465. [2021-07-13 19:59:01,271 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) [2021-07-13 19:59:01,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 465 states to 465 states and 996 transitions. [2021-07-13 19:59:01,272 INFO L78 Accepts]: Start accepts. Automaton has 465 states and 996 transitions. Word has length 58 [2021-07-13 19:59:01,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:59:01,272 INFO L482 AbstractCegarLoop]: Abstraction has 465 states and 996 transitions. [2021-07-13 19:59:01,272 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) [2021-07-13 19:59:01,272 INFO L276 IsEmpty]: Start isEmpty. Operand 465 states and 996 transitions. [2021-07-13 19:59:01,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-07-13 19:59:01,273 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:59:01,273 INFO L508 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:59:01,488 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-07-13 19:59:01,489 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:59:01,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:59:01,489 INFO L82 PathProgramCache]: Analyzing trace with hash -418583437, now seen corresponding path program 32 times [2021-07-13 19:59:01,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:59:01,489 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204431470] [2021-07-13 19:59:01,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:59:01,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:59:01,776 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 121 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:01,776 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:59:01,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204431470] [2021-07-13 19:59:01,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204431470] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:01,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1585635042] [2021-07-13 19:59:01,776 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 [2021-07-13 19:59:01,805 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:59:01,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:59:01,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 19:59:01,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:59:02,410 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 121 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:02,410 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1585635042] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:02,410 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:59:02,411 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27] total 53 [2021-07-13 19:59:02,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856264849] [2021-07-13 19:59:02,411 INFO L462 AbstractCegarLoop]: Interpolant automaton has 54 states [2021-07-13 19:59:02,411 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:59:02,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-07-13 19:59:02,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=509, Invalid=2353, Unknown=0, NotChecked=0, Total=2862 [2021-07-13 19:59:02,412 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) [2021-07-13 19:59:07,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:59:07,341 INFO L93 Difference]: Finished difference Result 3145 states and 6181 transitions. [2021-07-13 19:59:07,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 196 states. [2021-07-13 19:59:07,342 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 [2021-07-13 19:59:07,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:59:07,345 INFO L225 Difference]: With dead ends: 3145 [2021-07-13 19:59:07,345 INFO L226 Difference]: Without dead ends: 2575 [2021-07-13 19:59:07,347 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 244 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23656 ImplicationChecksByTransitivity, 4460.5ms TimeCoverageRelationStatistics Valid=16125, Invalid=44145, Unknown=0, NotChecked=0, Total=60270 [2021-07-13 19:59:07,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2575 states. [2021-07-13 19:59:07,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2575 to 290. [2021-07-13 19:59:07,356 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) [2021-07-13 19:59:07,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 593 transitions. [2021-07-13 19:59:07,356 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 593 transitions. Word has length 60 [2021-07-13 19:59:07,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:59:07,357 INFO L482 AbstractCegarLoop]: Abstraction has 290 states and 593 transitions. [2021-07-13 19:59:07,357 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) [2021-07-13 19:59:07,357 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 593 transitions. [2021-07-13 19:59:07,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-07-13 19:59:07,358 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:59:07,358 INFO L508 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:59:07,573 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-07-13 19:59:07,574 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:59:07,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:59:07,574 INFO L82 PathProgramCache]: Analyzing trace with hash 333465485, now seen corresponding path program 33 times [2021-07-13 19:59:07,574 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:59:07,574 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188054725] [2021-07-13 19:59:07,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:59:07,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:59:07,706 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 133 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:07,706 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:59:07,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188054725] [2021-07-13 19:59:07,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188054725] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:07,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [787848495] [2021-07-13 19:59:07,706 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 19:59:07,740 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-07-13 19:59:07,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:59:07,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 19:59:07,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:59:08,293 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 133 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:08,293 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [787848495] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:08,293 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:59:08,293 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 27] total 41 [2021-07-13 19:59:08,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662578696] [2021-07-13 19:59:08,294 INFO L462 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-07-13 19:59:08,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:59:08,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-07-13 19:59:08,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=1369, Unknown=0, NotChecked=0, Total=1722 [2021-07-13 19:59:08,294 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) [2021-07-13 19:59:13,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:59:13,294 INFO L93 Difference]: Finished difference Result 2039 states and 4053 transitions. [2021-07-13 19:59:13,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 197 states. [2021-07-13 19:59:13,294 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 [2021-07-13 19:59:13,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:59:13,297 INFO L225 Difference]: With dead ends: 2039 [2021-07-13 19:59:13,297 INFO L226 Difference]: Without dead ends: 2035 [2021-07-13 19:59:13,299 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 233 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23386 ImplicationChecksByTransitivity, 4670.3ms TimeCoverageRelationStatistics Valid=12911, Invalid=42079, Unknown=0, NotChecked=0, Total=54990 [2021-07-13 19:59:13,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2035 states. [2021-07-13 19:59:13,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2035 to 246. [2021-07-13 19:59:13,320 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) [2021-07-13 19:59:13,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 506 transitions. [2021-07-13 19:59:13,321 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 506 transitions. Word has length 60 [2021-07-13 19:59:13,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:59:13,321 INFO L482 AbstractCegarLoop]: Abstraction has 246 states and 506 transitions. [2021-07-13 19:59:13,321 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) [2021-07-13 19:59:13,321 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 506 transitions. [2021-07-13 19:59:13,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-07-13 19:59:13,336 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:59:13,337 INFO L508 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:59:13,552 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-07-13 19:59:13,552 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:59:13,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:59:13,553 INFO L82 PathProgramCache]: Analyzing trace with hash 545526321, now seen corresponding path program 34 times [2021-07-13 19:59:13,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:59:13,553 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194281734] [2021-07-13 19:59:13,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:59:13,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:59:13,677 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 0 proven. 288 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:13,678 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:59:13,678 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194281734] [2021-07-13 19:59:13,678 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194281734] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:13,678 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1451563798] [2021-07-13 19:59:13,678 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 19:59:13,708 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:59:13,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:59:13,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 51 conjunts are in the unsatisfiable core [2021-07-13 19:59:13,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:59:13,777 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 0 proven. 288 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:13,777 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1451563798] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:13,777 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:59:13,777 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2021-07-13 19:59:13,778 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357855327] [2021-07-13 19:59:13,778 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:59:13,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:59:13,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:59:13,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:59:13,779 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) [2021-07-13 19:59:13,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:59:13,925 INFO L93 Difference]: Finished difference Result 752 states and 1479 transitions. [2021-07-13 19:59:13,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:59:13,926 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 [2021-07-13 19:59:13,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:59:13,927 INFO L225 Difference]: With dead ends: 752 [2021-07-13 19:59:13,927 INFO L226 Difference]: Without dead ends: 665 [2021-07-13 19:59:13,927 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 73 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 85.1ms TimeCoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:59:13,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 665 states. [2021-07-13 19:59:13,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 665 to 505. [2021-07-13 19:59:13,949 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) [2021-07-13 19:59:13,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 1083 transitions. [2021-07-13 19:59:13,949 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 1083 transitions. Word has length 62 [2021-07-13 19:59:13,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:59:13,950 INFO L482 AbstractCegarLoop]: Abstraction has 505 states and 1083 transitions. [2021-07-13 19:59:13,950 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) [2021-07-13 19:59:13,950 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 1083 transitions. [2021-07-13 19:59:13,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-07-13 19:59:13,950 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:59:13,951 INFO L508 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:59:14,151 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-07-13 19:59:14,151 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:59:14,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:59:14,151 INFO L82 PathProgramCache]: Analyzing trace with hash 387589423, now seen corresponding path program 35 times [2021-07-13 19:59:14,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:59:14,151 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216953190] [2021-07-13 19:59:14,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:59:14,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:59:14,498 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 144 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:14,498 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:59:14,498 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216953190] [2021-07-13 19:59:14,498 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216953190] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:14,498 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1686555649] [2021-07-13 19:59:14,498 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 [2021-07-13 19:59:14,591 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-07-13 19:59:14,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:59:14,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:59:14,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:59:15,287 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 144 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:15,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1686555649] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:15,288 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:59:15,288 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29] total 57 [2021-07-13 19:59:15,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333815473] [2021-07-13 19:59:15,288 INFO L462 AbstractCegarLoop]: Interpolant automaton has 58 states [2021-07-13 19:59:15,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:59:15,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2021-07-13 19:59:15,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=583, Invalid=2723, Unknown=0, NotChecked=0, Total=3306 [2021-07-13 19:59:15,289 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) [2021-07-13 19:59:22,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:59:22,582 INFO L93 Difference]: Finished difference Result 3594 states and 7071 transitions. [2021-07-13 19:59:22,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 225 states. [2021-07-13 19:59:22,582 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 [2021-07-13 19:59:22,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:59:22,588 INFO L225 Difference]: With dead ends: 3594 [2021-07-13 19:59:22,588 INFO L226 Difference]: Without dead ends: 2934 [2021-07-13 19:59:22,591 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 277 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31467 ImplicationChecksByTransitivity, 6537.3ms TimeCoverageRelationStatistics Valid=20887, Invalid=56675, Unknown=0, NotChecked=0, Total=77562 [2021-07-13 19:59:22,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2934 states. [2021-07-13 19:59:22,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2934 to 312. [2021-07-13 19:59:22,644 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) [2021-07-13 19:59:22,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 639 transitions. [2021-07-13 19:59:22,645 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 639 transitions. Word has length 64 [2021-07-13 19:59:22,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:59:22,645 INFO L482 AbstractCegarLoop]: Abstraction has 312 states and 639 transitions. [2021-07-13 19:59:22,645 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) [2021-07-13 19:59:22,645 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 639 transitions. [2021-07-13 19:59:22,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-07-13 19:59:22,646 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:59:22,646 INFO L508 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:59:22,846 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-07-13 19:59:22,846 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:59:22,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:59:22,847 INFO L82 PathProgramCache]: Analyzing trace with hash -1658179955, now seen corresponding path program 36 times [2021-07-13 19:59:22,847 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:59:22,847 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373797768] [2021-07-13 19:59:22,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:59:22,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:59:23,047 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 157 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:23,047 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:59:23,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373797768] [2021-07-13 19:59:23,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373797768] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:23,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1854139701] [2021-07-13 19:59:23,047 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 [2021-07-13 19:59:23,083 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2021-07-13 19:59:23,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:59:23,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:59:23,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:59:23,677 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 157 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:23,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1854139701] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:23,677 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:59:23,677 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 29] total 44 [2021-07-13 19:59:23,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574182243] [2021-07-13 19:59:23,677 INFO L462 AbstractCegarLoop]: Interpolant automaton has 45 states [2021-07-13 19:59:23,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:59:23,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-07-13 19:59:23,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=401, Invalid=1579, Unknown=0, NotChecked=0, Total=1980 [2021-07-13 19:59:23,678 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) [2021-07-13 19:59:29,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:59:29,767 INFO L93 Difference]: Finished difference Result 2349 states and 4673 transitions. [2021-07-13 19:59:29,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 226 states. [2021-07-13 19:59:29,768 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 [2021-07-13 19:59:29,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:59:29,771 INFO L225 Difference]: With dead ends: 2349 [2021-07-13 19:59:29,771 INFO L226 Difference]: Without dead ends: 2345 [2021-07-13 19:59:29,773 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 265 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31046 ImplicationChecksByTransitivity, 5774.3ms TimeCoverageRelationStatistics Valid=16676, Invalid=54346, Unknown=0, NotChecked=0, Total=71022 [2021-07-13 19:59:29,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2345 states. [2021-07-13 19:59:29,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2345 to 264. [2021-07-13 19:59:29,781 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) [2021-07-13 19:59:29,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 544 transitions. [2021-07-13 19:59:29,781 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 544 transitions. Word has length 64 [2021-07-13 19:59:29,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:59:29,782 INFO L482 AbstractCegarLoop]: Abstraction has 264 states and 544 transitions. [2021-07-13 19:59:29,782 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) [2021-07-13 19:59:29,782 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 544 transitions. [2021-07-13 19:59:29,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-07-13 19:59:29,782 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:59:29,783 INFO L508 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:59:29,999 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-07-13 19:59:29,999 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:59:30,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:59:30,000 INFO L82 PathProgramCache]: Analyzing trace with hash -2111435795, now seen corresponding path program 37 times [2021-07-13 19:59:30,000 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:59:30,000 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121711756] [2021-07-13 19:59:30,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:59:30,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:59:30,122 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 0 proven. 338 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:30,122 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:59:30,122 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121711756] [2021-07-13 19:59:30,122 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [121711756] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:30,122 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [368197729] [2021-07-13 19:59:30,122 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 [2021-07-13 19:59:30,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:59:30,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 55 conjunts are in the unsatisfiable core [2021-07-13 19:59:30,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:59:30,223 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 0 proven. 338 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:30,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [368197729] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:30,223 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:59:30,223 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2021-07-13 19:59:30,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334648532] [2021-07-13 19:59:30,223 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:59:30,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:59:30,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:59:30,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:59:30,224 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) [2021-07-13 19:59:30,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:59:30,409 INFO L93 Difference]: Finished difference Result 811 states and 1596 transitions. [2021-07-13 19:59:30,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:59:30,409 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 [2021-07-13 19:59:30,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:59:30,410 INFO L225 Difference]: With dead ends: 811 [2021-07-13 19:59:30,410 INFO L226 Difference]: Without dead ends: 718 [2021-07-13 19:59:30,411 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 78 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 97.4ms TimeCoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:59:30,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 718 states. [2021-07-13 19:59:30,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 718 to 545. [2021-07-13 19:59:30,416 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) [2021-07-13 19:59:30,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 545 states to 545 states and 1170 transitions. [2021-07-13 19:59:30,417 INFO L78 Accepts]: Start accepts. Automaton has 545 states and 1170 transitions. Word has length 66 [2021-07-13 19:59:30,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:59:30,417 INFO L482 AbstractCegarLoop]: Abstraction has 545 states and 1170 transitions. [2021-07-13 19:59:30,417 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) [2021-07-13 19:59:30,417 INFO L276 IsEmpty]: Start isEmpty. Operand 545 states and 1170 transitions. [2021-07-13 19:59:30,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-07-13 19:59:30,418 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:59:30,418 INFO L508 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:59:30,634 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-07-13 19:59:30,634 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:59:30,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:59:30,635 INFO L82 PathProgramCache]: Analyzing trace with hash 1230925803, now seen corresponding path program 38 times [2021-07-13 19:59:30,635 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:59:30,635 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670809213] [2021-07-13 19:59:30,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:59:30,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:59:31,009 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 169 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:31,009 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:59:31,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670809213] [2021-07-13 19:59:31,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670809213] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:31,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1824165259] [2021-07-13 19:59:31,009 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 [2021-07-13 19:59:31,043 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:59:31,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:59:31,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:59:31,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:59:31,829 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 169 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:31,830 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1824165259] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:31,830 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:59:31,830 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31] total 61 [2021-07-13 19:59:31,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980771481] [2021-07-13 19:59:31,830 INFO L462 AbstractCegarLoop]: Interpolant automaton has 62 states [2021-07-13 19:59:31,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:59:31,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2021-07-13 19:59:31,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=662, Invalid=3120, Unknown=0, NotChecked=0, Total=3782 [2021-07-13 19:59:31,831 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) [2021-07-13 19:59:39,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:59:39,750 INFO L93 Difference]: Finished difference Result 4071 states and 8017 transitions. [2021-07-13 19:59:39,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 256 states. [2021-07-13 19:59:39,750 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 [2021-07-13 19:59:39,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:59:39,763 INFO L225 Difference]: With dead ends: 4071 [2021-07-13 19:59:39,763 INFO L226 Difference]: Without dead ends: 3315 [2021-07-13 19:59:39,767 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 351 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 312 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41086 ImplicationChecksByTransitivity, 6956.9ms TimeCoverageRelationStatistics Valid=26637, Invalid=71645, Unknown=0, NotChecked=0, Total=98282 [2021-07-13 19:59:39,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3315 states. [2021-07-13 19:59:39,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3315 to 334. [2021-07-13 19:59:39,781 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) [2021-07-13 19:59:39,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 685 transitions. [2021-07-13 19:59:39,782 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 685 transitions. Word has length 68 [2021-07-13 19:59:39,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:59:39,782 INFO L482 AbstractCegarLoop]: Abstraction has 334 states and 685 transitions. [2021-07-13 19:59:39,782 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) [2021-07-13 19:59:39,782 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 685 transitions. [2021-07-13 19:59:39,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-07-13 19:59:39,783 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:59:39,783 INFO L508 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:59:39,999 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:59:40,000 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:59:40,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:59:40,000 INFO L82 PathProgramCache]: Analyzing trace with hash -868702579, now seen corresponding path program 39 times [2021-07-13 19:59:40,000 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:59:40,000 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459912928] [2021-07-13 19:59:40,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:59:40,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:59:40,182 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 183 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:40,182 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:59:40,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459912928] [2021-07-13 19:59:40,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459912928] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:40,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [327037441] [2021-07-13 19:59:40,182 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 [2021-07-13 19:59:40,219 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2021-07-13 19:59:40,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:59:40,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:59:40,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:59:40,910 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 183 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:40,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [327037441] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:40,910 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:59:40,910 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 31] total 47 [2021-07-13 19:59:40,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618145513] [2021-07-13 19:59:40,911 INFO L462 AbstractCegarLoop]: Interpolant automaton has 48 states [2021-07-13 19:59:40,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:59:40,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-07-13 19:59:40,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=452, Invalid=1804, Unknown=0, NotChecked=0, Total=2256 [2021-07-13 19:59:40,915 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) [2021-07-13 19:59:48,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:59:48,283 INFO L93 Difference]: Finished difference Result 2681 states and 5337 transitions. [2021-07-13 19:59:48,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 257 states. [2021-07-13 19:59:48,284 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 [2021-07-13 19:59:48,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:59:48,299 INFO L225 Difference]: With dead ends: 2681 [2021-07-13 19:59:48,299 INFO L226 Difference]: Without dead ends: 2677 [2021-07-13 19:59:48,303 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 351 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 299 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40452 ImplicationChecksByTransitivity, 6924.3ms TimeCoverageRelationStatistics Valid=21212, Invalid=69088, Unknown=0, NotChecked=0, Total=90300 [2021-07-13 19:59:48,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2677 states. [2021-07-13 19:59:48,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2677 to 282. [2021-07-13 19:59:48,323 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) [2021-07-13 19:59:48,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 582 transitions. [2021-07-13 19:59:48,323 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 582 transitions. Word has length 68 [2021-07-13 19:59:48,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:59:48,323 INFO L482 AbstractCegarLoop]: Abstraction has 282 states and 582 transitions. [2021-07-13 19:59:48,324 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) [2021-07-13 19:59:48,324 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 582 transitions. [2021-07-13 19:59:48,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-07-13 19:59:48,324 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:59:48,324 INFO L508 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:59:48,524 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:59:48,525 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:59:48,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:59:48,525 INFO L82 PathProgramCache]: Analyzing trace with hash 880973737, now seen corresponding path program 40 times [2021-07-13 19:59:48,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:59:48,525 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630043841] [2021-07-13 19:59:48,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:59:48,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:59:48,679 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:48,679 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:59:48,679 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630043841] [2021-07-13 19:59:48,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630043841] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:48,679 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247523170] [2021-07-13 19:59:48,679 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 [2021-07-13 19:59:48,722 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:59:48,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:59:48,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 59 conjunts are in the unsatisfiable core [2021-07-13 19:59:48,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:59:48,799 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:48,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [247523170] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:48,799 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:59:48,799 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2021-07-13 19:59:48,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011524269] [2021-07-13 19:59:48,799 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:59:48,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:59:48,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:59:48,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:59:48,800 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) [2021-07-13 19:59:49,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:59:49,058 INFO L93 Difference]: Finished difference Result 870 states and 1713 transitions. [2021-07-13 19:59:49,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:59:49,059 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 [2021-07-13 19:59:49,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:59:49,060 INFO L225 Difference]: With dead ends: 870 [2021-07-13 19:59:49,060 INFO L226 Difference]: Without dead ends: 771 [2021-07-13 19:59:49,060 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 83 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 125.6ms TimeCoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:59:49,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 771 states. [2021-07-13 19:59:49,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 771 to 585. [2021-07-13 19:59:49,065 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) [2021-07-13 19:59:49,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 585 states to 585 states and 1257 transitions. [2021-07-13 19:59:49,066 INFO L78 Accepts]: Start accepts. Automaton has 585 states and 1257 transitions. Word has length 70 [2021-07-13 19:59:49,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:59:49,066 INFO L482 AbstractCegarLoop]: Abstraction has 585 states and 1257 transitions. [2021-07-13 19:59:49,066 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) [2021-07-13 19:59:49,066 INFO L276 IsEmpty]: Start isEmpty. Operand 585 states and 1257 transitions. [2021-07-13 19:59:49,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-07-13 19:59:49,067 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:59:49,067 INFO L508 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:59:49,282 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-07-13 19:59:49,283 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:59:49,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:59:49,283 INFO L82 PathProgramCache]: Analyzing trace with hash 550292647, now seen corresponding path program 41 times [2021-07-13 19:59:49,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:59:49,283 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388273328] [2021-07-13 19:59:49,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:59:49,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:59:49,674 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 196 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:49,675 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:59:49,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388273328] [2021-07-13 19:59:49,675 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388273328] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:49,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1716731521] [2021-07-13 19:59:49,675 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 [2021-07-13 19:59:49,711 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2021-07-13 19:59:49,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:59:49,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:59:49,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:59:50,541 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 196 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:50,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1716731521] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:50,541 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:59:50,541 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33] total 65 [2021-07-13 19:59:50,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35785340] [2021-07-13 19:59:50,541 INFO L462 AbstractCegarLoop]: Interpolant automaton has 66 states [2021-07-13 19:59:50,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:59:50,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-07-13 19:59:50,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=746, Invalid=3544, Unknown=0, NotChecked=0, Total=4290 [2021-07-13 19:59:50,542 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) [2021-07-13 20:00:00,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:00:00,600 INFO L93 Difference]: Finished difference Result 4576 states and 9019 transitions. [2021-07-13 20:00:00,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 289 states. [2021-07-13 20:00:00,601 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 [2021-07-13 20:00:00,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:00:00,606 INFO L225 Difference]: With dead ends: 4576 [2021-07-13 20:00:00,606 INFO L226 Difference]: Without dead ends: 3718 [2021-07-13 20:00:00,611 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 390 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 349 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52776 ImplicationChecksByTransitivity, 8790.4ms TimeCoverageRelationStatistics Valid=33504, Invalid=89346, Unknown=0, NotChecked=0, Total=122850 [2021-07-13 20:00:00,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3718 states. [2021-07-13 20:00:00,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3718 to 356. [2021-07-13 20:00:00,624 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) [2021-07-13 20:00:00,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 731 transitions. [2021-07-13 20:00:00,625 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 731 transitions. Word has length 72 [2021-07-13 20:00:00,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:00:00,625 INFO L482 AbstractCegarLoop]: Abstraction has 356 states and 731 transitions. [2021-07-13 20:00:00,625 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) [2021-07-13 20:00:00,625 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 731 transitions. [2021-07-13 20:00:00,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-07-13 20:00:00,626 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:00:00,626 INFO L508 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:00:00,841 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:00:00,842 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:00:00,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:00:00,842 INFO L82 PathProgramCache]: Analyzing trace with hash -1768231027, now seen corresponding path program 42 times [2021-07-13 20:00:00,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:00:00,842 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562769841] [2021-07-13 20:00:00,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:00:00,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:00:01,009 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 211 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:00:01,009 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:00:01,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562769841] [2021-07-13 20:00:01,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562769841] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:00:01,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [67304991] [2021-07-13 20:00:01,009 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 [2021-07-13 20:00:01,115 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2021-07-13 20:00:01,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:00:01,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 20:00:01,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:00:01,868 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 211 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:00:01,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [67304991] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:00:01,869 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:00:01,869 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 33] total 50 [2021-07-13 20:00:01,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130241948] [2021-07-13 20:00:01,869 INFO L462 AbstractCegarLoop]: Interpolant automaton has 51 states [2021-07-13 20:00:01,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:00:01,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-07-13 20:00:01,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=506, Invalid=2044, Unknown=0, NotChecked=0, Total=2550 [2021-07-13 20:00:01,870 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) [2021-07-13 20:00:10,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:00:10,506 INFO L93 Difference]: Finished difference Result 3035 states and 6045 transitions. [2021-07-13 20:00:10,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 290 states. [2021-07-13 20:00:10,507 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 [2021-07-13 20:00:10,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:00:10,511 INFO L225 Difference]: With dead ends: 3035 [2021-07-13 20:00:10,511 INFO L226 Difference]: Without dead ends: 3031 [2021-07-13 20:00:10,515 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 390 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 335 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51852 ImplicationChecksByTransitivity, 8030.5ms TimeCoverageRelationStatistics Valid=26618, Invalid=86614, Unknown=0, NotChecked=0, Total=113232 [2021-07-13 20:00:10,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3031 states. [2021-07-13 20:00:10,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3031 to 300. [2021-07-13 20:00:10,546 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) [2021-07-13 20:00:10,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 620 transitions. [2021-07-13 20:00:10,547 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 620 transitions. Word has length 72 [2021-07-13 20:00:10,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:00:10,547 INFO L482 AbstractCegarLoop]: Abstraction has 300 states and 620 transitions. [2021-07-13 20:00:10,547 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) [2021-07-13 20:00:10,547 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 620 transitions. [2021-07-13 20:00:10,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-07-13 20:00:10,548 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:00:10,548 INFO L508 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:00:10,748 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:00:10,749 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:00:10,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:00:10,749 INFO L82 PathProgramCache]: Analyzing trace with hash -372460187, now seen corresponding path program 43 times [2021-07-13 20:00:10,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:00:10,749 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328309939] [2021-07-13 20:00:10,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:00:10,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:00:10,924 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 0 proven. 450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:00:10,924 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:00:10,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328309939] [2021-07-13 20:00:10,924 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328309939] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:00:10,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [350967270] [2021-07-13 20:00:10,925 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 [2021-07-13 20:00:10,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:00:10,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 63 conjunts are in the unsatisfiable core [2021-07-13 20:00:10,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:00:11,044 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 0 proven. 450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:00:11,044 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [350967270] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:00:11,044 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:00:11,044 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2021-07-13 20:00:11,044 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715331674] [2021-07-13 20:00:11,045 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:00:11,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:00:11,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:00:11,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:00:11,045 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) [2021-07-13 20:00:11,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:00:11,341 INFO L93 Difference]: Finished difference Result 929 states and 1830 transitions. [2021-07-13 20:00:11,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 20:00:11,342 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 [2021-07-13 20:00:11,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:00:11,343 INFO L225 Difference]: With dead ends: 929 [2021-07-13 20:00:11,343 INFO L226 Difference]: Without dead ends: 824 [2021-07-13 20:00:11,343 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 88 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 145.0ms TimeCoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:00:11,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 824 states. [2021-07-13 20:00:11,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 824 to 625. [2021-07-13 20:00:11,349 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) [2021-07-13 20:00:11,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 625 states to 625 states and 1344 transitions. [2021-07-13 20:00:11,350 INFO L78 Accepts]: Start accepts. Automaton has 625 states and 1344 transitions. Word has length 74 [2021-07-13 20:00:11,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:00:11,350 INFO L482 AbstractCegarLoop]: Abstraction has 625 states and 1344 transitions. [2021-07-13 20:00:11,350 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) [2021-07-13 20:00:11,350 INFO L276 IsEmpty]: Start isEmpty. Operand 625 states and 1344 transitions. [2021-07-13 20:00:11,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-07-13 20:00:11,351 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:00:11,351 INFO L508 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:00:11,567 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-07-13 20:00:11,568 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:00:11,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:00:11,568 INFO L82 PathProgramCache]: Analyzing trace with hash -1948763293, now seen corresponding path program 44 times [2021-07-13 20:00:11,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:00:11,568 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537900640] [2021-07-13 20:00:11,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:00:11,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:00:12,026 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 225 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:00:12,026 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:00:12,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537900640] [2021-07-13 20:00:12,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1537900640] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:00:12,027 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1254940101] [2021-07-13 20:00:12,027 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 [2021-07-13 20:00:12,077 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:00:12,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:00:12,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 35 conjunts are in the unsatisfiable core [2021-07-13 20:00:12,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:00:13,028 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 225 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:00:13,028 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1254940101] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:00:13,028 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:00:13,028 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35] total 69 [2021-07-13 20:00:13,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471258882] [2021-07-13 20:00:13,028 INFO L462 AbstractCegarLoop]: Interpolant automaton has 70 states [2021-07-13 20:00:13,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:00:13,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2021-07-13 20:00:13,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=835, Invalid=3995, Unknown=0, NotChecked=0, Total=4830 [2021-07-13 20:00:13,030 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) [2021-07-13 20:00:23,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:00:23,454 INFO L93 Difference]: Finished difference Result 5109 states and 10077 transitions. [2021-07-13 20:00:23,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 324 states. [2021-07-13 20:00:23,455 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 [2021-07-13 20:00:23,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:00:23,460 INFO L225 Difference]: With dead ends: 5109 [2021-07-13 20:00:23,460 INFO L226 Difference]: Without dead ends: 4143 [2021-07-13 20:00:23,466 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 431 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 388 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66817 ImplicationChecksByTransitivity, 8747.4ms TimeCoverageRelationStatistics Valid=41625, Invalid=110085, Unknown=0, NotChecked=0, Total=151710 [2021-07-13 20:00:23,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4143 states. [2021-07-13 20:00:23,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4143 to 378. [2021-07-13 20:00:23,491 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) [2021-07-13 20:00:23,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 777 transitions. [2021-07-13 20:00:23,492 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 777 transitions. Word has length 76 [2021-07-13 20:00:23,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:00:23,492 INFO L482 AbstractCegarLoop]: Abstraction has 378 states and 777 transitions. [2021-07-13 20:00:23,492 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) [2021-07-13 20:00:23,492 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 777 transitions. [2021-07-13 20:00:23,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-07-13 20:00:23,513 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:00:23,513 INFO L508 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:00:23,720 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-07-13 20:00:23,721 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:00:23,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:00:23,721 INFO L82 PathProgramCache]: Analyzing trace with hash 122702221, now seen corresponding path program 45 times [2021-07-13 20:00:23,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:00:23,721 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693637921] [2021-07-13 20:00:23,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:00:23,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:00:23,919 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 241 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:00:23,919 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:00:23,919 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693637921] [2021-07-13 20:00:23,919 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693637921] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:00:23,920 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [469596443] [2021-07-13 20:00:23,920 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 [2021-07-13 20:00:23,970 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2021-07-13 20:00:23,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:00:23,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 35 conjunts are in the unsatisfiable core [2021-07-13 20:00:23,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:00:24,763 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 241 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:00:24,764 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [469596443] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:00:24,764 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:00:24,764 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 35] total 53 [2021-07-13 20:00:24,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442364166] [2021-07-13 20:00:24,764 INFO L462 AbstractCegarLoop]: Interpolant automaton has 54 states [2021-07-13 20:00:24,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:00:24,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-07-13 20:00:24,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=2299, Unknown=0, NotChecked=0, Total=2862 [2021-07-13 20:00:24,765 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) [2021-07-13 20:00:33,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:00:33,360 INFO L93 Difference]: Finished difference Result 3411 states and 6797 transitions. [2021-07-13 20:00:33,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 325 states. [2021-07-13 20:00:33,360 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 [2021-07-13 20:00:33,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:00:33,365 INFO L225 Difference]: With dead ends: 3411 [2021-07-13 20:00:33,365 INFO L226 Difference]: Without dead ends: 3407 [2021-07-13 20:00:33,374 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 431 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 373 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65510 ImplicationChecksByTransitivity, 7893.0ms TimeCoverageRelationStatistics Valid=32999, Invalid=107251, Unknown=0, NotChecked=0, Total=140250 [2021-07-13 20:00:33,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3407 states. [2021-07-13 20:00:33,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3407 to 318. [2021-07-13 20:00:33,391 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) [2021-07-13 20:00:33,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 658 transitions. [2021-07-13 20:00:33,392 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 658 transitions. Word has length 76 [2021-07-13 20:00:33,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:00:33,392 INFO L482 AbstractCegarLoop]: Abstraction has 318 states and 658 transitions. [2021-07-13 20:00:33,392 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) [2021-07-13 20:00:33,392 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 658 transitions. [2021-07-13 20:00:33,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-07-13 20:00:33,393 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:00:33,393 INFO L508 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:00:33,610 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-07-13 20:00:33,610 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:00:33,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:00:33,618 INFO L82 PathProgramCache]: Analyzing trace with hash -1078500063, now seen corresponding path program 46 times [2021-07-13 20:00:33,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:00:33,619 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475189387] [2021-07-13 20:00:33,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:00:33,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:00:33,857 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 0 proven. 512 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:00:33,857 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:00:33,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475189387] [2021-07-13 20:00:33,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475189387] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:00:33,877 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [714792118] [2021-07-13 20:00:33,877 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 [2021-07-13 20:00:33,918 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:00:33,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:00:33,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 67 conjunts are in the unsatisfiable core [2021-07-13 20:00:33,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:00:34,002 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 0 proven. 512 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:00:34,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [714792118] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:00:34,003 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:00:34,003 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2021-07-13 20:00:34,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395327132] [2021-07-13 20:00:34,003 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:00:34,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:00:34,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:00:34,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:00:34,004 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) [2021-07-13 20:00:34,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:00:34,332 INFO L93 Difference]: Finished difference Result 988 states and 1947 transitions. [2021-07-13 20:00:34,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 20:00:34,333 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 [2021-07-13 20:00:34,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:00:34,334 INFO L225 Difference]: With dead ends: 988 [2021-07-13 20:00:34,334 INFO L226 Difference]: Without dead ends: 877 [2021-07-13 20:00:34,334 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 93 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 173.9ms TimeCoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:00:34,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 877 states. [2021-07-13 20:00:34,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 877 to 665. [2021-07-13 20:00:34,341 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) [2021-07-13 20:00:34,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 665 states to 665 states and 1431 transitions. [2021-07-13 20:00:34,341 INFO L78 Accepts]: Start accepts. Automaton has 665 states and 1431 transitions. Word has length 78 [2021-07-13 20:00:34,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:00:34,342 INFO L482 AbstractCegarLoop]: Abstraction has 665 states and 1431 transitions. [2021-07-13 20:00:34,342 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) [2021-07-13 20:00:34,342 INFO L276 IsEmpty]: Start isEmpty. Operand 665 states and 1431 transitions. [2021-07-13 20:00:34,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-07-13 20:00:34,360 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:00:34,360 INFO L508 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:00:34,567 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:00:34,567 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:00:34,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:00:34,567 INFO L82 PathProgramCache]: Analyzing trace with hash -999048161, now seen corresponding path program 47 times [2021-07-13 20:00:34,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:00:34,568 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762033485] [2021-07-13 20:00:34,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:00:34,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:00:35,068 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 256 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:00:35,069 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:00:35,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762033485] [2021-07-13 20:00:35,069 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762033485] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:00:35,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092425481] [2021-07-13 20:00:35,069 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 [2021-07-13 20:00:35,112 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2021-07-13 20:00:35,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:00:35,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 37 conjunts are in the unsatisfiable core [2021-07-13 20:00:35,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:00:36,143 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 256 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:00:36,143 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1092425481] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:00:36,143 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:00:36,143 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 37] total 73 [2021-07-13 20:00:36,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82329311] [2021-07-13 20:00:36,144 INFO L462 AbstractCegarLoop]: Interpolant automaton has 74 states [2021-07-13 20:00:36,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:00:36,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2021-07-13 20:00:36,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=929, Invalid=4473, Unknown=0, NotChecked=0, Total=5402 [2021-07-13 20:00:36,144 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) [2021-07-13 20:00:49,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:00:49,978 INFO L93 Difference]: Finished difference Result 5670 states and 11191 transitions. [2021-07-13 20:00:49,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 361 states. [2021-07-13 20:00:49,979 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 [2021-07-13 20:00:49,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:00:49,984 INFO L225 Difference]: With dead ends: 5670 [2021-07-13 20:00:49,984 INFO L226 Difference]: Without dead ends: 4590 [2021-07-13 20:00:49,991 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 474 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 429 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83508 ImplicationChecksByTransitivity, 11496.5ms TimeCoverageRelationStatistics Valid=51145, Invalid=134185, Unknown=0, NotChecked=0, Total=185330 [2021-07-13 20:00:49,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4590 states. [2021-07-13 20:00:50,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4590 to 400. [2021-07-13 20:00:50,013 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) [2021-07-13 20:00:50,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 823 transitions. [2021-07-13 20:00:50,014 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 823 transitions. Word has length 80 [2021-07-13 20:00:50,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:00:50,014 INFO L482 AbstractCegarLoop]: Abstraction has 400 states and 823 transitions. [2021-07-13 20:00:50,014 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) [2021-07-13 20:00:50,014 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 823 transitions. [2021-07-13 20:00:50,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-07-13 20:00:50,015 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:00:50,015 INFO L508 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:00:50,231 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-07-13 20:00:50,231 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:00:50,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:00:50,232 INFO L82 PathProgramCache]: Analyzing trace with hash -2100824947, now seen corresponding path program 48 times [2021-07-13 20:00:50,232 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:00:50,232 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484800938] [2021-07-13 20:00:50,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:00:50,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:00:50,494 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 273 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:00:50,494 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:00:50,495 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484800938] [2021-07-13 20:00:50,495 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484800938] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:00:50,495 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [60652874] [2021-07-13 20:00:50,495 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 [2021-07-13 20:00:50,538 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) [2021-07-13 20:00:50,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:00:50,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 37 conjunts are in the unsatisfiable core [2021-07-13 20:00:50,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:00:51,567 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 273 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:00:51,568 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [60652874] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:00:51,568 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:00:51,568 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 37] total 56 [2021-07-13 20:00:51,568 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864829148] [2021-07-13 20:00:51,568 INFO L462 AbstractCegarLoop]: Interpolant automaton has 57 states [2021-07-13 20:00:51,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:00:51,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-07-13 20:00:51,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=623, Invalid=2569, Unknown=0, NotChecked=0, Total=3192 [2021-07-13 20:00:51,569 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) [2021-07-13 20:01:00,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:01:00,308 INFO L93 Difference]: Finished difference Result 3809 states and 7593 transitions. [2021-07-13 20:01:00,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 362 states. [2021-07-13 20:01:00,311 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 [2021-07-13 20:01:00,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:01:00,315 INFO L225 Difference]: With dead ends: 3809 [2021-07-13 20:01:00,316 INFO L226 Difference]: Without dead ends: 3805 [2021-07-13 20:01:00,322 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 474 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 413 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81707 ImplicationChecksByTransitivity, 8288.0ms TimeCoverageRelationStatistics Valid=40466, Invalid=131344, Unknown=0, NotChecked=0, Total=171810 [2021-07-13 20:01:00,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3805 states. [2021-07-13 20:01:00,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3805 to 336. [2021-07-13 20:01:00,336 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) [2021-07-13 20:01:00,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 696 transitions. [2021-07-13 20:01:00,336 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 696 transitions. Word has length 80 [2021-07-13 20:01:00,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:01:00,336 INFO L482 AbstractCegarLoop]: Abstraction has 336 states and 696 transitions. [2021-07-13 20:01:00,336 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) [2021-07-13 20:01:00,337 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 696 transitions. [2021-07-13 20:01:00,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-07-13 20:01:00,337 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:01:00,337 INFO L508 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:01:00,553 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:01:00,553 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:01:00,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:01:00,553 INFO L82 PathProgramCache]: Analyzing trace with hash 1064675037, now seen corresponding path program 49 times [2021-07-13 20:01:00,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:01:00,553 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654038846] [2021-07-13 20:01:00,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:01:00,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:01:00,760 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 0 proven. 578 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:01:00,761 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:01:00,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654038846] [2021-07-13 20:01:00,761 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654038846] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:01:00,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192054219] [2021-07-13 20:01:00,761 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 [2021-07-13 20:01:00,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:01:00,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 71 conjunts are in the unsatisfiable core [2021-07-13 20:01:00,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:01:00,891 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 0 proven. 578 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:01:00,892 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1192054219] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:01:00,892 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:01:00,892 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2021-07-13 20:01:00,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709124699] [2021-07-13 20:01:00,892 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 20:01:00,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:01:00,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 20:01:00,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:01:00,893 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) [2021-07-13 20:01:01,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:01:01,240 INFO L93 Difference]: Finished difference Result 1047 states and 2064 transitions. [2021-07-13 20:01:01,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 20:01:01,240 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 [2021-07-13 20:01:01,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:01:01,241 INFO L225 Difference]: With dead ends: 1047 [2021-07-13 20:01:01,242 INFO L226 Difference]: Without dead ends: 930 [2021-07-13 20:01:01,242 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 98 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 176.0ms TimeCoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:01:01,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 930 states. [2021-07-13 20:01:01,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 930 to 705. [2021-07-13 20:01:01,248 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) [2021-07-13 20:01:01,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 705 states to 705 states and 1518 transitions. [2021-07-13 20:01:01,249 INFO L78 Accepts]: Start accepts. Automaton has 705 states and 1518 transitions. Word has length 82 [2021-07-13 20:01:01,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:01:01,249 INFO L482 AbstractCegarLoop]: Abstraction has 705 states and 1518 transitions. [2021-07-13 20:01:01,249 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) [2021-07-13 20:01:01,249 INFO L276 IsEmpty]: Start isEmpty. Operand 705 states and 1518 transitions. [2021-07-13 20:01:01,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-07-13 20:01:01,250 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:01:01,250 INFO L508 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:01:01,463 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:01:01,463 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:01:01,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:01:01,463 INFO L82 PathProgramCache]: Analyzing trace with hash 1343377115, now seen corresponding path program 50 times [2021-07-13 20:01:01,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:01:01,464 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795914149] [2021-07-13 20:01:01,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:01:01,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:01:01,958 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 289 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:01:01,958 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:01:01,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795914149] [2021-07-13 20:01:01,959 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795914149] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:01:01,959 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [965940213] [2021-07-13 20:01:01,959 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 [2021-07-13 20:01:02,003 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:01:02,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:01:02,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 39 conjunts are in the unsatisfiable core [2021-07-13 20:01:02,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:01:03,093 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 289 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:01:03,093 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [965940213] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:01:03,093 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:01:03,094 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 39] total 77 [2021-07-13 20:01:03,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843381630] [2021-07-13 20:01:03,094 INFO L462 AbstractCegarLoop]: Interpolant automaton has 78 states [2021-07-13 20:01:03,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:01:03,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2021-07-13 20:01:03,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1028, Invalid=4978, Unknown=0, NotChecked=0, Total=6006 [2021-07-13 20:01:03,095 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) [2021-07-13 20:01:17,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:01:17,013 INFO L93 Difference]: Finished difference Result 6259 states and 12361 transitions. [2021-07-13 20:01:17,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 400 states. [2021-07-13 20:01:17,014 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 [2021-07-13 20:01:17,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:01:17,018 INFO L225 Difference]: With dead ends: 6259 [2021-07-13 20:01:17,018 INFO L226 Difference]: Without dead ends: 5059 [2021-07-13 20:01:17,027 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 519 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 472 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103165 ImplicationChecksByTransitivity, 11355.7ms TimeCoverageRelationStatistics Valid=62217, Invalid=161985, Unknown=0, NotChecked=0, Total=224202 [2021-07-13 20:01:17,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5059 states. [2021-07-13 20:01:17,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5059 to 422. [2021-07-13 20:01:17,044 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) [2021-07-13 20:01:17,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 422 states to 422 states and 869 transitions. [2021-07-13 20:01:17,044 INFO L78 Accepts]: Start accepts. Automaton has 422 states and 869 transitions. Word has length 84 [2021-07-13 20:01:17,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:01:17,044 INFO L482 AbstractCegarLoop]: Abstraction has 422 states and 869 transitions. [2021-07-13 20:01:17,044 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) [2021-07-13 20:01:17,045 INFO L276 IsEmpty]: Start isEmpty. Operand 422 states and 869 transitions. [2021-07-13 20:01:17,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-07-13 20:01:17,045 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:01:17,045 INFO L508 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:01:17,261 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-07-13 20:01:17,262 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:01:17,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:01:17,262 INFO L82 PathProgramCache]: Analyzing trace with hash 182530189, now seen corresponding path program 51 times [2021-07-13 20:01:17,262 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:01:17,262 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145634858] [2021-07-13 20:01:17,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:01:17,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:01:17,501 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 307 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:01:17,501 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:01:17,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145634858] [2021-07-13 20:01:17,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145634858] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:01:17,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [232575459] [2021-07-13 20:01:17,501 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 [2021-07-13 20:01:17,545 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2021-07-13 20:01:17,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:01:17,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 39 conjunts are in the unsatisfiable core [2021-07-13 20:01:17,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:01:18,235 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 307 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:01:18,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [232575459] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:01:18,236 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:01:18,236 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 39] total 59 [2021-07-13 20:01:18,236 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221763222] [2021-07-13 20:01:18,236 INFO L462 AbstractCegarLoop]: Interpolant automaton has 60 states [2021-07-13 20:01:18,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:01:18,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-07-13 20:01:18,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=686, Invalid=2854, Unknown=0, NotChecked=0, Total=3540 [2021-07-13 20:01:18,237 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) [2021-07-13 20:01:28,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:01:28,537 INFO L93 Difference]: Finished difference Result 4229 states and 8433 transitions. [2021-07-13 20:01:28,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 401 states. [2021-07-13 20:01:28,538 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 [2021-07-13 20:01:28,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:01:28,543 INFO L225 Difference]: With dead ends: 4229 [2021-07-13 20:01:28,543 INFO L226 Difference]: Without dead ends: 4225 [2021-07-13 20:01:28,552 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 519 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 455 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100740 ImplicationChecksByTransitivity, 9267.6ms TimeCoverageRelationStatistics Valid=49136, Invalid=159256, Unknown=0, NotChecked=0, Total=208392 [2021-07-13 20:01:28,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4225 states. [2021-07-13 20:01:28,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4225 to 354. [2021-07-13 20:01:28,566 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) [2021-07-13 20:01:28,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 734 transitions. [2021-07-13 20:01:28,566 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 734 transitions. Word has length 84 [2021-07-13 20:01:28,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:01:28,566 INFO L482 AbstractCegarLoop]: Abstraction has 354 states and 734 transitions. [2021-07-13 20:01:28,567 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) [2021-07-13 20:01:28,567 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 734 transitions. [2021-07-13 20:01:28,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-07-13 20:01:28,567 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:01:28,567 INFO L508 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:01:28,777 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:01:28,777 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:01:28,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:01:28,777 INFO L82 PathProgramCache]: Analyzing trace with hash 1572502169, now seen corresponding path program 52 times [2021-07-13 20:01:28,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:01:28,778 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267940058] [2021-07-13 20:01:28,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:01:28,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:01:29,043 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 0 proven. 648 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:01:29,044 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:01:29,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267940058] [2021-07-13 20:01:29,044 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267940058] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:01:29,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1730066760] [2021-07-13 20:01:29,044 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 [2021-07-13 20:01:29,090 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:01:29,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:01:29,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 75 conjunts are in the unsatisfiable core [2021-07-13 20:01:29,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:01:29,193 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 0 proven. 648 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:01:29,193 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1730066760] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:01:29,193 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:01:29,193 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2021-07-13 20:01:29,193 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33765352] [2021-07-13 20:01:29,194 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 20:01:29,194 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:01:29,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 20:01:29,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2021-07-13 20:01:29,194 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) [2021-07-13 20:01:29,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:01:29,622 INFO L93 Difference]: Finished difference Result 1106 states and 2181 transitions. [2021-07-13 20:01:29,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 20:01:29,623 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 [2021-07-13 20:01:29,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:01:29,625 INFO L225 Difference]: With dead ends: 1106 [2021-07-13 20:01:29,625 INFO L226 Difference]: Without dead ends: 983 [2021-07-13 20:01:29,625 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 103 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 195.7ms TimeCoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2021-07-13 20:01:29,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 983 states. [2021-07-13 20:01:29,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 983 to 745. [2021-07-13 20:01:29,632 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) [2021-07-13 20:01:29,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 745 states to 745 states and 1605 transitions. [2021-07-13 20:01:29,633 INFO L78 Accepts]: Start accepts. Automaton has 745 states and 1605 transitions. Word has length 86 [2021-07-13 20:01:29,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:01:29,633 INFO L482 AbstractCegarLoop]: Abstraction has 745 states and 1605 transitions. [2021-07-13 20:01:29,633 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) [2021-07-13 20:01:29,633 INFO L276 IsEmpty]: Start isEmpty. Operand 745 states and 1605 transitions. [2021-07-13 20:01:29,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-07-13 20:01:29,634 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:01:29,634 INFO L508 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:01:29,851 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-07-13 20:01:29,851 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:01:29,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:01:29,851 INFO L82 PathProgramCache]: Analyzing trace with hash -5835881, now seen corresponding path program 53 times [2021-07-13 20:01:29,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:01:29,852 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168345788] [2021-07-13 20:01:29,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:01:29,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:01:30,536 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 324 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:01:30,536 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:01:30,536 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168345788] [2021-07-13 20:01:30,536 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168345788] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:01:30,536 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723668315] [2021-07-13 20:01:30,536 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 [2021-07-13 20:01:30,580 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2021-07-13 20:01:30,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:01:30,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 20:01:30,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:01:31,540 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 324 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:01:31,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [723668315] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:01:31,540 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:01:31,540 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 41] total 81 [2021-07-13 20:01:31,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663917421] [2021-07-13 20:01:31,559 INFO L462 AbstractCegarLoop]: Interpolant automaton has 82 states [2021-07-13 20:01:31,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:01:31,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2021-07-13 20:01:31,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1132, Invalid=5510, Unknown=0, NotChecked=0, Total=6642 [2021-07-13 20:01:31,561 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) [2021-07-13 20:01:49,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:01:49,483 INFO L93 Difference]: Finished difference Result 6876 states and 13587 transitions. [2021-07-13 20:01:49,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 441 states. [2021-07-13 20:01:49,483 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 [2021-07-13 20:01:49,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:01:49,489 INFO L225 Difference]: With dead ends: 6876 [2021-07-13 20:01:49,489 INFO L226 Difference]: Without dead ends: 5550 [2021-07-13 20:01:49,498 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 566 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 517 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126123 ImplicationChecksByTransitivity, 14170.7ms TimeCoverageRelationStatistics Valid=75002, Invalid=193840, Unknown=0, NotChecked=0, Total=268842 [2021-07-13 20:01:49,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5550 states. [2021-07-13 20:01:49,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5550 to 444. [2021-07-13 20:01:49,516 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) [2021-07-13 20:01:49,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 444 states to 444 states and 915 transitions. [2021-07-13 20:01:49,517 INFO L78 Accepts]: Start accepts. Automaton has 444 states and 915 transitions. Word has length 88 [2021-07-13 20:01:49,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:01:49,517 INFO L482 AbstractCegarLoop]: Abstraction has 444 states and 915 transitions. [2021-07-13 20:01:49,517 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) [2021-07-13 20:01:49,517 INFO L276 IsEmpty]: Start isEmpty. Operand 444 states and 915 transitions. [2021-07-13 20:01:49,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-07-13 20:01:49,518 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:01:49,518 INFO L508 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:01:49,735 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-07-13 20:01:49,735 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:01:49,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:01:49,735 INFO L82 PathProgramCache]: Analyzing trace with hash -2098512499, now seen corresponding path program 54 times [2021-07-13 20:01:49,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:01:49,736 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414343958] [2021-07-13 20:01:49,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:01:49,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:01:49,999 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 343 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:01:49,999 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:01:49,999 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414343958] [2021-07-13 20:01:49,999 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414343958] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:01:49,999 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [884613335] [2021-07-13 20:01:49,999 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 [2021-07-13 20:01:50,044 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2021-07-13 20:01:50,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:01:50,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 20:01:50,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:01:51,198 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 343 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:01:51,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [884613335] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:01:51,198 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:01:51,198 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 41] total 62 [2021-07-13 20:01:51,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045653409] [2021-07-13 20:01:51,198 INFO L462 AbstractCegarLoop]: Interpolant automaton has 63 states [2021-07-13 20:01:51,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:01:51,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2021-07-13 20:01:51,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=752, Invalid=3154, Unknown=0, NotChecked=0, Total=3906 [2021-07-13 20:01:51,199 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) [2021-07-13 20:02:03,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:02:03,781 INFO L93 Difference]: Finished difference Result 4671 states and 9317 transitions. [2021-07-13 20:02:03,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 442 states. [2021-07-13 20:02:03,781 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 [2021-07-13 20:02:03,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:02:03,786 INFO L225 Difference]: With dead ends: 4671 [2021-07-13 20:02:03,786 INFO L226 Difference]: Without dead ends: 4667 [2021-07-13 20:02:03,794 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 566 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 499 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122923 ImplicationChecksByTransitivity, 11543.1ms TimeCoverageRelationStatistics Valid=59132, Invalid=191368, Unknown=0, NotChecked=0, Total=250500 [2021-07-13 20:02:03,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4667 states. [2021-07-13 20:02:03,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4667 to 372. [2021-07-13 20:02:03,809 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) [2021-07-13 20:02:03,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 772 transitions. [2021-07-13 20:02:03,810 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 772 transitions. Word has length 88 [2021-07-13 20:02:03,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:02:03,810 INFO L482 AbstractCegarLoop]: Abstraction has 372 states and 772 transitions. [2021-07-13 20:02:03,810 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) [2021-07-13 20:02:03,810 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 772 transitions. [2021-07-13 20:02:03,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-07-13 20:02:03,811 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:02:03,811 INFO L508 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:02:04,027 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:02:04,028 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:02:04,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:02:04,028 INFO L82 PathProgramCache]: Analyzing trace with hash 2058936405, now seen corresponding path program 55 times [2021-07-13 20:02:04,028 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:02:04,028 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647141173] [2021-07-13 20:02:04,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:02:04,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:02:04,215 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 0 proven. 722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:02:04,215 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:02:04,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647141173] [2021-07-13 20:02:04,215 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647141173] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:02:04,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [636787227] [2021-07-13 20:02:04,215 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 [2021-07-13 20:02:04,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:02:04,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 79 conjunts are in the unsatisfiable core [2021-07-13 20:02:04,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:02:04,325 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 0 proven. 722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:02:04,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [636787227] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:02:04,325 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:02:04,325 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2021-07-13 20:02:04,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400322553] [2021-07-13 20:02:04,326 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 20:02:04,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:02:04,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 20:02:04,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2021-07-13 20:02:04,326 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) [2021-07-13 20:02:04,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:02:04,596 INFO L93 Difference]: Finished difference Result 1165 states and 2298 transitions. [2021-07-13 20:02:04,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 20:02:04,596 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 [2021-07-13 20:02:04,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:02:04,598 INFO L225 Difference]: With dead ends: 1165 [2021-07-13 20:02:04,598 INFO L226 Difference]: Without dead ends: 1036 [2021-07-13 20:02:04,598 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 108 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 140.4ms TimeCoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2021-07-13 20:02:04,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1036 states. [2021-07-13 20:02:04,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1036 to 785. [2021-07-13 20:02:04,605 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) [2021-07-13 20:02:04,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 785 states to 785 states and 1692 transitions. [2021-07-13 20:02:04,606 INFO L78 Accepts]: Start accepts. Automaton has 785 states and 1692 transitions. Word has length 90 [2021-07-13 20:02:04,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:02:04,606 INFO L482 AbstractCegarLoop]: Abstraction has 785 states and 1692 transitions. [2021-07-13 20:02:04,606 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) [2021-07-13 20:02:04,606 INFO L276 IsEmpty]: Start isEmpty. Operand 785 states and 1692 transitions. [2021-07-13 20:02:04,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-07-13 20:02:04,607 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:02:04,607 INFO L508 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:02:04,824 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-07-13 20:02:04,825 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:02:04,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:02:04,825 INFO L82 PathProgramCache]: Analyzing trace with hash -274421165, now seen corresponding path program 56 times [2021-07-13 20:02:04,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:02:04,825 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472044812] [2021-07-13 20:02:04,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:02:04,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:02:05,266 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 361 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:02:05,267 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:02:05,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472044812] [2021-07-13 20:02:05,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472044812] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:02:05,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790329824] [2021-07-13 20:02:05,267 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 [2021-07-13 20:02:05,314 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:02:05,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:02:05,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-13 20:02:05,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:02:06,171 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 361 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:02:06,171 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [790329824] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:02:06,171 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:02:06,171 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 43] total 85 [2021-07-13 20:02:06,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132984334] [2021-07-13 20:02:06,172 INFO L462 AbstractCegarLoop]: Interpolant automaton has 86 states [2021-07-13 20:02:06,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:02:06,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2021-07-13 20:02:06,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1241, Invalid=6069, Unknown=0, NotChecked=0, Total=7310 [2021-07-13 20:02:06,173 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) [2021-07-13 20:02:27,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:02:27,642 INFO L93 Difference]: Finished difference Result 7521 states and 14869 transitions. [2021-07-13 20:02:27,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 484 states. [2021-07-13 20:02:27,642 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 [2021-07-13 20:02:27,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:02:27,649 INFO L225 Difference]: With dead ends: 7521 [2021-07-13 20:02:27,649 INFO L226 Difference]: Without dead ends: 6063 [2021-07-13 20:02:27,659 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 615 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 564 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152734 ImplicationChecksByTransitivity, 16222.6ms TimeCoverageRelationStatistics Valid=89669, Invalid=230121, Unknown=0, NotChecked=0, Total=319790 [2021-07-13 20:02:27,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6063 states. [2021-07-13 20:02:27,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6063 to 466. [2021-07-13 20:02:27,683 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) [2021-07-13 20:02:27,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 466 states to 466 states and 961 transitions. [2021-07-13 20:02:27,683 INFO L78 Accepts]: Start accepts. Automaton has 466 states and 961 transitions. Word has length 92 [2021-07-13 20:02:27,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:02:27,683 INFO L482 AbstractCegarLoop]: Abstraction has 466 states and 961 transitions. [2021-07-13 20:02:27,683 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) [2021-07-13 20:02:27,683 INFO L276 IsEmpty]: Start isEmpty. Operand 466 states and 961 transitions. [2021-07-13 20:02:27,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-07-13 20:02:27,684 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:02:27,684 INFO L508 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:02:27,900 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:02:27,901 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:02:27,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:02:27,901 INFO L82 PathProgramCache]: Analyzing trace with hash -207266931, now seen corresponding path program 57 times [2021-07-13 20:02:27,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:02:27,901 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076082998] [2021-07-13 20:02:27,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:02:27,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:02:28,192 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 381 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:02:28,192 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:02:28,192 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076082998] [2021-07-13 20:02:28,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076082998] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:02:28,192 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1260722008] [2021-07-13 20:02:28,192 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 [2021-07-13 20:02:28,242 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 23 check-sat command(s) [2021-07-13 20:02:28,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:02:28,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-13 20:02:28,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:02:29,491 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 381 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:02:29,492 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1260722008] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:02:29,492 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:02:29,492 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 43] total 65 [2021-07-13 20:02:29,492 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580778906] [2021-07-13 20:02:29,492 INFO L462 AbstractCegarLoop]: Interpolant automaton has 66 states [2021-07-13 20:02:29,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:02:29,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-07-13 20:02:29,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=821, Invalid=3469, Unknown=0, NotChecked=0, Total=4290 [2021-07-13 20:02:29,493 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) [2021-07-13 20:02:46,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:02:46,944 INFO L93 Difference]: Finished difference Result 5135 states and 10245 transitions. [2021-07-13 20:02:46,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 485 states. [2021-07-13 20:02:46,944 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 [2021-07-13 20:02:46,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:02:46,950 INFO L225 Difference]: With dead ends: 5135 [2021-07-13 20:02:46,951 INFO L226 Difference]: Without dead ends: 5131 [2021-07-13 20:02:46,964 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 615 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 545 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148586 ImplicationChecksByTransitivity, 15913.0ms TimeCoverageRelationStatistics Valid=70583, Invalid=228079, Unknown=0, NotChecked=0, Total=298662 [2021-07-13 20:02:46,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5131 states. [2021-07-13 20:02:46,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5131 to 390. [2021-07-13 20:02:46,982 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) [2021-07-13 20:02:46,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 810 transitions. [2021-07-13 20:02:46,983 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 810 transitions. Word has length 92 [2021-07-13 20:02:46,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:02:46,983 INFO L482 AbstractCegarLoop]: Abstraction has 390 states and 810 transitions. [2021-07-13 20:02:46,983 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) [2021-07-13 20:02:46,983 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 810 transitions. [2021-07-13 20:02:46,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-07-13 20:02:46,983 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:02:46,984 INFO L508 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:02:47,200 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-07-13 20:02:47,200 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:02:47,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:02:47,201 INFO L82 PathProgramCache]: Analyzing trace with hash 1646516241, now seen corresponding path program 58 times [2021-07-13 20:02:47,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:02:47,201 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872530126] [2021-07-13 20:02:47,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:02:47,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:02:47,492 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 0 proven. 800 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:02:47,492 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:02:47,492 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872530126] [2021-07-13 20:02:47,492 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872530126] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:02:47,492 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799230845] [2021-07-13 20:02:47,492 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 [2021-07-13 20:02:47,569 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:02:47,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:02:47,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 83 conjunts are in the unsatisfiable core [2021-07-13 20:02:47,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:02:47,671 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 0 proven. 800 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:02:47,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1799230845] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:02:47,671 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:02:47,671 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2021-07-13 20:02:47,671 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058391149] [2021-07-13 20:02:47,671 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:02:47,671 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:02:47,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:02:47,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:02:47,672 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) [2021-07-13 20:02:48,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:02:48,120 INFO L93 Difference]: Finished difference Result 1224 states and 2415 transitions. [2021-07-13 20:02:48,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 20:02:48,121 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 [2021-07-13 20:02:48,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:02:48,122 INFO L225 Difference]: With dead ends: 1224 [2021-07-13 20:02:48,122 INFO L226 Difference]: Without dead ends: 1089 [2021-07-13 20:02:48,122 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 113 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 261.3ms TimeCoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:02:48,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1089 states. [2021-07-13 20:02:48,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1089 to 825. [2021-07-13 20:02:48,129 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) [2021-07-13 20:02:48,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 825 states to 825 states and 1779 transitions. [2021-07-13 20:02:48,130 INFO L78 Accepts]: Start accepts. Automaton has 825 states and 1779 transitions. Word has length 94 [2021-07-13 20:02:48,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:02:48,130 INFO L482 AbstractCegarLoop]: Abstraction has 825 states and 1779 transitions. [2021-07-13 20:02:48,130 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) [2021-07-13 20:02:48,130 INFO L276 IsEmpty]: Start isEmpty. Operand 825 states and 1779 transitions. [2021-07-13 20:02:48,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-07-13 20:02:48,131 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:02:48,131 INFO L508 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:02:48,347 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:02:48,347 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:02:48,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:02:48,347 INFO L82 PathProgramCache]: Analyzing trace with hash -2013367537, now seen corresponding path program 59 times [2021-07-13 20:02:48,347 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:02:48,347 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275587621] [2021-07-13 20:02:48,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:02:48,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:02:49,043 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 400 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:02:49,043 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:02:49,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275587621] [2021-07-13 20:02:49,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275587621] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:02:49,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [377577728] [2021-07-13 20:02:49,043 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 [2021-07-13 20:02:49,093 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2021-07-13 20:02:49,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:02:49,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 45 conjunts are in the unsatisfiable core [2021-07-13 20:02:49,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:02:50,524 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 400 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:02:50,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [377577728] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:02:50,525 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:02:50,525 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 45] total 89 [2021-07-13 20:02:50,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80345523] [2021-07-13 20:02:50,525 INFO L462 AbstractCegarLoop]: Interpolant automaton has 90 states [2021-07-13 20:02:50,525 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:02:50,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2021-07-13 20:02:50,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1355, Invalid=6655, Unknown=0, NotChecked=0, Total=8010 [2021-07-13 20:02:50,527 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) [2021-07-13 20:03:18,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:03:18,685 INFO L93 Difference]: Finished difference Result 8194 states and 16207 transitions. [2021-07-13 20:03:18,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 529 states. [2021-07-13 20:03:18,686 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 [2021-07-13 20:03:18,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:03:18,693 INFO L225 Difference]: With dead ends: 8194 [2021-07-13 20:03:18,693 INFO L226 Difference]: Without dead ends: 6598 [2021-07-13 20:03:18,706 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 666 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 613 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183369 ImplicationChecksByTransitivity, 22214.5ms TimeCoverageRelationStatistics Valid=106395, Invalid=271215, Unknown=0, NotChecked=0, Total=377610 [2021-07-13 20:03:18,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6598 states. [2021-07-13 20:03:18,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6598 to 488. [2021-07-13 20:03:18,732 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) [2021-07-13 20:03:18,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 488 states to 488 states and 1007 transitions. [2021-07-13 20:03:18,733 INFO L78 Accepts]: Start accepts. Automaton has 488 states and 1007 transitions. Word has length 96 [2021-07-13 20:03:18,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:03:18,733 INFO L482 AbstractCegarLoop]: Abstraction has 488 states and 1007 transitions. [2021-07-13 20:03:18,733 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) [2021-07-13 20:03:18,733 INFO L276 IsEmpty]: Start isEmpty. Operand 488 states and 1007 transitions. [2021-07-13 20:03:18,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-07-13 20:03:18,734 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:03:18,734 INFO L508 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:03:18,949 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2021-07-13 20:03:18,950 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:03:18,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:03:18,950 INFO L82 PathProgramCache]: Analyzing trace with hash -817968499, now seen corresponding path program 60 times [2021-07-13 20:03:18,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:03:18,950 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840322894] [2021-07-13 20:03:18,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:03:18,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:03:19,308 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 421 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:03:19,309 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:03:19,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840322894] [2021-07-13 20:03:19,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840322894] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:03:19,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1494870865] [2021-07-13 20:03:19,309 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 [2021-07-13 20:03:19,362 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 24 check-sat command(s) [2021-07-13 20:03:19,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:03:19,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 45 conjunts are in the unsatisfiable core [2021-07-13 20:03:19,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:03:20,716 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 421 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:03:20,717 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1494870865] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:03:20,717 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:03:20,717 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 45] total 68 [2021-07-13 20:03:20,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659566787] [2021-07-13 20:03:20,717 INFO L462 AbstractCegarLoop]: Interpolant automaton has 69 states [2021-07-13 20:03:20,717 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:03:20,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2021-07-13 20:03:20,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=893, Invalid=3799, Unknown=0, NotChecked=0, Total=4692 [2021-07-13 20:03:20,718 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) [2021-07-13 20:03:40,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:03:40,002 INFO L93 Difference]: Finished difference Result 5621 states and 11217 transitions. [2021-07-13 20:03:40,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 530 states. [2021-07-13 20:03:40,002 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 [2021-07-13 20:03:40,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:03:40,008 INFO L225 Difference]: With dead ends: 5621 [2021-07-13 20:03:40,008 INFO L226 Difference]: Without dead ends: 5617 [2021-07-13 20:03:40,024 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 666 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 593 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178076 ImplicationChecksByTransitivity, 17732.6ms TimeCoverageRelationStatistics Valid=83624, Invalid=269806, Unknown=0, NotChecked=0, Total=353430 [2021-07-13 20:03:40,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5617 states. [2021-07-13 20:03:40,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5617 to 408. [2021-07-13 20:03:40,087 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) [2021-07-13 20:03:40,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 848 transitions. [2021-07-13 20:03:40,088 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 848 transitions. Word has length 96 [2021-07-13 20:03:40,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:03:40,088 INFO L482 AbstractCegarLoop]: Abstraction has 408 states and 848 transitions. [2021-07-13 20:03:40,089 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) [2021-07-13 20:03:40,089 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 848 transitions. [2021-07-13 20:03:40,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-07-13 20:03:40,089 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:03:40,089 INFO L508 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:03:40,307 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:03:40,307 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:03:40,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:03:40,307 INFO L82 PathProgramCache]: Analyzing trace with hash 1261330893, now seen corresponding path program 61 times [2021-07-13 20:03:40,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:03:40,307 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422862950] [2021-07-13 20:03:40,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:03:40,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:03:40,493 INFO L134 CoverageAnalysis]: Checked inductivity of 882 backedges. 0 proven. 882 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:03:40,494 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:03:40,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422862950] [2021-07-13 20:03:40,494 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422862950] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:03:40,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739373750] [2021-07-13 20:03:40,494 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 [2021-07-13 20:03:40,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:03:40,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 87 conjunts are in the unsatisfiable core [2021-07-13 20:03:40,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:03:40,605 INFO L134 CoverageAnalysis]: Checked inductivity of 882 backedges. 0 proven. 882 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:03:40,606 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1739373750] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:03:40,606 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:03:40,606 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2021-07-13 20:03:40,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721107601] [2021-07-13 20:03:40,606 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 20:03:40,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:03:40,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 20:03:40,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=507, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:03:40,606 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) [2021-07-13 20:03:40,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:03:40,929 INFO L93 Difference]: Finished difference Result 1283 states and 2532 transitions. [2021-07-13 20:03:40,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 20:03:40,929 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 [2021-07-13 20:03:40,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:03:40,931 INFO L225 Difference]: With dead ends: 1283 [2021-07-13 20:03:40,931 INFO L226 Difference]: Without dead ends: 1142 [2021-07-13 20:03:40,931 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 118 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 152.0ms TimeCoverageRelationStatistics Valid=45, Invalid=507, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:03:40,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1142 states. [2021-07-13 20:03:40,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1142 to 865. [2021-07-13 20:03:40,938 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) [2021-07-13 20:03:40,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 865 states to 865 states and 1866 transitions. [2021-07-13 20:03:40,939 INFO L78 Accepts]: Start accepts. Automaton has 865 states and 1866 transitions. Word has length 98 [2021-07-13 20:03:40,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:03:40,939 INFO L482 AbstractCegarLoop]: Abstraction has 865 states and 1866 transitions. [2021-07-13 20:03:40,939 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) [2021-07-13 20:03:40,939 INFO L276 IsEmpty]: Start isEmpty. Operand 865 states and 1866 transitions. [2021-07-13 20:03:40,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-07-13 20:03:40,940 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:03:40,940 INFO L508 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:03:41,157 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2021-07-13 20:03:41,157 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:03:41,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:03:41,157 INFO L82 PathProgramCache]: Analyzing trace with hash 2082950603, now seen corresponding path program 62 times [2021-07-13 20:03:41,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:03:41,157 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096267327] [2021-07-13 20:03:41,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:03:41,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:03:41,620 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 441 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:03:41,620 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:03:41,620 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096267327] [2021-07-13 20:03:41,620 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096267327] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:03:41,620 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720342747] [2021-07-13 20:03:41,620 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 [2021-07-13 20:03:41,662 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:03:41,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:03:41,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-13 20:03:41,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:03:42,745 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 441 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:03:42,745 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1720342747] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:03:42,745 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:03:42,746 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 47] total 93 [2021-07-13 20:03:42,746 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501250272] [2021-07-13 20:03:42,746 INFO L462 AbstractCegarLoop]: Interpolant automaton has 94 states [2021-07-13 20:03:42,746 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:03:42,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2021-07-13 20:03:42,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1474, Invalid=7268, Unknown=0, NotChecked=0, Total=8742 [2021-07-13 20:03:42,748 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) [2021-07-13 20:04:13,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:04:13,523 INFO L93 Difference]: Finished difference Result 8895 states and 17601 transitions. [2021-07-13 20:04:13,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 576 states. [2021-07-13 20:04:13,524 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 [2021-07-13 20:04:13,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:04:13,532 INFO L225 Difference]: With dead ends: 8895 [2021-07-13 20:04:13,532 INFO L226 Difference]: Without dead ends: 7155 [2021-07-13 20:04:13,547 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 719 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 664 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218416 ImplicationChecksByTransitivity, 23077.0ms TimeCoverageRelationStatistics Valid=125365, Invalid=317525, Unknown=0, NotChecked=0, Total=442890 [2021-07-13 20:04:13,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7155 states. [2021-07-13 20:04:13,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7155 to 510. [2021-07-13 20:04:13,571 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) [2021-07-13 20:04:13,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 510 states to 510 states and 1053 transitions. [2021-07-13 20:04:13,572 INFO L78 Accepts]: Start accepts. Automaton has 510 states and 1053 transitions. Word has length 100 [2021-07-13 20:04:13,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:04:13,572 INFO L482 AbstractCegarLoop]: Abstraction has 510 states and 1053 transitions. [2021-07-13 20:04:13,572 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) [2021-07-13 20:04:13,573 INFO L276 IsEmpty]: Start isEmpty. Operand 510 states and 1053 transitions. [2021-07-13 20:04:13,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-07-13 20:04:13,573 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:04:13,573 INFO L508 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:04:13,789 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:04:13,789 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:04:13,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:04:13,789 INFO L82 PathProgramCache]: Analyzing trace with hash 894880397, now seen corresponding path program 63 times [2021-07-13 20:04:13,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:04:13,789 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177940880] [2021-07-13 20:04:13,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:04:13,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:04:14,117 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 463 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:04:14,117 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:04:14,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177940880] [2021-07-13 20:04:14,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177940880] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:04:14,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131134919] [2021-07-13 20:04:14,118 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 [2021-07-13 20:04:14,168 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 25 check-sat command(s) [2021-07-13 20:04:14,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:04:14,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-13 20:04:14,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:04:15,370 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 463 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:04:15,370 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [131134919] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:04:15,370 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:04:15,370 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 47] total 71 [2021-07-13 20:04:15,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337642995] [2021-07-13 20:04:15,371 INFO L462 AbstractCegarLoop]: Interpolant automaton has 72 states [2021-07-13 20:04:15,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:04:15,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2021-07-13 20:04:15,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=968, Invalid=4144, Unknown=0, NotChecked=0, Total=5112 [2021-07-13 20:04:15,372 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) [2021-07-13 20:04:38,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:04:38,479 INFO L93 Difference]: Finished difference Result 6129 states and 12233 transitions. [2021-07-13 20:04:38,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 577 states. [2021-07-13 20:04:38,479 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 [2021-07-13 20:04:38,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:04:38,486 INFO L225 Difference]: With dead ends: 6129 [2021-07-13 20:04:38,486 INFO L226 Difference]: Without dead ends: 6125 [2021-07-13 20:04:38,503 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 719 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 643 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211756 ImplicationChecksByTransitivity, 20933.8ms TimeCoverageRelationStatistics Valid=98396, Invalid=316984, Unknown=0, NotChecked=0, Total=415380 [2021-07-13 20:04:38,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6125 states. [2021-07-13 20:04:38,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6125 to 426. [2021-07-13 20:04:38,525 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) [2021-07-13 20:04:38,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 426 states to 426 states and 886 transitions. [2021-07-13 20:04:38,526 INFO L78 Accepts]: Start accepts. Automaton has 426 states and 886 transitions. Word has length 100 [2021-07-13 20:04:38,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:04:38,526 INFO L482 AbstractCegarLoop]: Abstraction has 426 states and 886 transitions. [2021-07-13 20:04:38,526 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) [2021-07-13 20:04:38,526 INFO L276 IsEmpty]: Start isEmpty. Operand 426 states and 886 transitions. [2021-07-13 20:04:38,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-07-13 20:04:38,526 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:04:38,526 INFO L508 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:04:38,744 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-07-13 20:04:38,744 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:04:38,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:04:38,744 INFO L82 PathProgramCache]: Analyzing trace with hash -661946999, now seen corresponding path program 64 times [2021-07-13 20:04:38,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:04:38,744 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011270342] [2021-07-13 20:04:38,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:04:38,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:04:39,048 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 0 proven. 968 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:04:39,048 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:04:39,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011270342] [2021-07-13 20:04:39,048 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1011270342] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:04:39,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [675388347] [2021-07-13 20:04:39,048 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 20:04:39,093 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:04:39,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:04:39,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 91 conjunts are in the unsatisfiable core [2021-07-13 20:04:39,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:04:39,216 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 0 proven. 968 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:04:39,217 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [675388347] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:04:39,217 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:04:39,217 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2021-07-13 20:04:39,217 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576581396] [2021-07-13 20:04:39,217 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 20:04:39,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:04:39,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 20:04:39,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2021-07-13 20:04:39,217 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) [2021-07-13 20:04:39,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:04:39,781 INFO L93 Difference]: Finished difference Result 1342 states and 2649 transitions. [2021-07-13 20:04:39,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 20:04:39,781 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 [2021-07-13 20:04:39,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:04:39,783 INFO L225 Difference]: With dead ends: 1342 [2021-07-13 20:04:39,783 INFO L226 Difference]: Without dead ends: 1195 [2021-07-13 20:04:39,783 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 123 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 258.7ms TimeCoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2021-07-13 20:04:39,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1195 states. [2021-07-13 20:04:39,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1195 to 905. [2021-07-13 20:04:39,790 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) [2021-07-13 20:04:39,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 905 states to 905 states and 1953 transitions. [2021-07-13 20:04:39,791 INFO L78 Accepts]: Start accepts. Automaton has 905 states and 1953 transitions. Word has length 102 [2021-07-13 20:04:39,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:04:39,791 INFO L482 AbstractCegarLoop]: Abstraction has 905 states and 1953 transitions. [2021-07-13 20:04:39,791 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) [2021-07-13 20:04:39,791 INFO L276 IsEmpty]: Start isEmpty. Operand 905 states and 1953 transitions. [2021-07-13 20:04:39,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-07-13 20:04:39,792 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:04:39,792 INFO L508 BasicCegarLoop]: trace histogram [23, 23, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:04:40,008 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-07-13 20:04:40,008 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:04:40,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:04:40,008 INFO L82 PathProgramCache]: Analyzing trace with hash -887997817, now seen corresponding path program 65 times [2021-07-13 20:04:40,008 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:04:40,008 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238365214] [2021-07-13 20:04:40,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:04:40,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:04:40,843 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 484 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:04:40,844 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:04:40,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238365214] [2021-07-13 20:04:40,844 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [238365214] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:04:40,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443028702] [2021-07-13 20:04:40,844 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 [2021-07-13 20:04:40,894 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2021-07-13 20:04:40,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:04:40,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-13 20:04:40,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:04:42,585 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 484 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:04:42,585 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [443028702] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:04:42,585 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:04:42,585 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 49] total 97 [2021-07-13 20:04:42,586 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73940451] [2021-07-13 20:04:42,586 INFO L462 AbstractCegarLoop]: Interpolant automaton has 98 states [2021-07-13 20:04:42,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:04:42,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2021-07-13 20:04:42,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1598, Invalid=7908, Unknown=0, NotChecked=0, Total=9506 [2021-07-13 20:04:42,587 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) [2021-07-13 20:05:19,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:05:19,930 INFO L93 Difference]: Finished difference Result 9624 states and 19051 transitions. [2021-07-13 20:05:19,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 625 states. [2021-07-13 20:05:19,930 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 [2021-07-13 20:05:19,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:05:19,939 INFO L225 Difference]: With dead ends: 9624 [2021-07-13 20:05:19,939 INFO L226 Difference]: Without dead ends: 7734 [2021-07-13 20:05:19,957 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 774 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 717 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258282 ImplicationChecksByTransitivity, 27815.1ms TimeCoverageRelationStatistics Valid=146772, Invalid=369470, Unknown=0, NotChecked=0, Total=516242 [2021-07-13 20:05:19,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7734 states. [2021-07-13 20:05:19,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7734 to 532. [2021-07-13 20:05:19,983 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) [2021-07-13 20:05:19,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 532 states to 532 states and 1099 transitions. [2021-07-13 20:05:19,983 INFO L78 Accepts]: Start accepts. Automaton has 532 states and 1099 transitions. Word has length 104 [2021-07-13 20:05:19,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:05:19,984 INFO L482 AbstractCegarLoop]: Abstraction has 532 states and 1099 transitions. [2021-07-13 20:05:19,984 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) [2021-07-13 20:05:19,984 INFO L276 IsEmpty]: Start isEmpty. Operand 532 states and 1099 transitions. [2021-07-13 20:05:19,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-07-13 20:05:19,985 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:05:19,985 INFO L508 BasicCegarLoop]: trace histogram [23, 23, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:05:20,201 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-07-13 20:05:20,201 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:05:20,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:05:20,201 INFO L82 PathProgramCache]: Analyzing trace with hash 922524557, now seen corresponding path program 66 times [2021-07-13 20:05:20,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:05:20,201 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10815084] [2021-07-13 20:05:20,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:05:20,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:05:20,555 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 507 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:20,555 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:05:20,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10815084] [2021-07-13 20:05:20,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10815084] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:20,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [900847974] [2021-07-13 20:05:20,555 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 [2021-07-13 20:05:20,607 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 26 check-sat command(s) [2021-07-13 20:05:20,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:05:20,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-13 20:05:20,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:05:22,225 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 507 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:22,226 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [900847974] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:22,226 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:05:22,226 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 49] total 74 [2021-07-13 20:05:22,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6203867] [2021-07-13 20:05:22,226 INFO L462 AbstractCegarLoop]: Interpolant automaton has 75 states [2021-07-13 20:05:22,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:05:22,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2021-07-13 20:05:22,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1046, Invalid=4504, Unknown=0, NotChecked=0, Total=5550 [2021-07-13 20:05:22,227 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) [2021-07-13 20:05:43,696 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 13 [2021-07-13 20:05:48,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:05:48,195 INFO L93 Difference]: Finished difference Result 6659 states and 13293 transitions. [2021-07-13 20:05:48,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 626 states. [2021-07-13 20:05:48,196 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 [2021-07-13 20:05:48,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:05:48,203 INFO L225 Difference]: With dead ends: 6659 [2021-07-13 20:05:48,203 INFO L226 Difference]: Without dead ends: 6655 [2021-07-13 20:05:48,218 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 774 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 695 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250006 ImplicationChecksByTransitivity, 23409.9ms TimeCoverageRelationStatistics Valid=115046, Invalid=370066, Unknown=0, NotChecked=0, Total=485112 [2021-07-13 20:05:48,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6655 states. [2021-07-13 20:05:48,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6655 to 444. [2021-07-13 20:05:48,239 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) [2021-07-13 20:05:48,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 444 states to 444 states and 924 transitions. [2021-07-13 20:05:48,240 INFO L78 Accepts]: Start accepts. Automaton has 444 states and 924 transitions. Word has length 104 [2021-07-13 20:05:48,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:05:48,240 INFO L482 AbstractCegarLoop]: Abstraction has 444 states and 924 transitions. [2021-07-13 20:05:48,240 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) [2021-07-13 20:05:48,240 INFO L276 IsEmpty]: Start isEmpty. Operand 444 states and 924 transitions. [2021-07-13 20:05:48,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-07-13 20:05:48,241 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:05:48,241 INFO L508 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:05:48,458 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:05:48,458 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:05:48,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:05:48,458 INFO L82 PathProgramCache]: Analyzing trace with hash 409873221, now seen corresponding path program 67 times [2021-07-13 20:05:48,458 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:05:48,458 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148066150] [2021-07-13 20:05:48,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:05:48,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:05:48,778 INFO L134 CoverageAnalysis]: Checked inductivity of 1058 backedges. 0 proven. 1058 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:48,778 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:05:48,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148066150] [2021-07-13 20:05:48,778 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148066150] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:48,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [425952641] [2021-07-13 20:05:48,778 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 [2021-07-13 20:05:48,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:05:48,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 95 conjunts are in the unsatisfiable core [2021-07-13 20:05:48,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:05:48,954 INFO L134 CoverageAnalysis]: Checked inductivity of 1058 backedges. 0 proven. 1058 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:48,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [425952641] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:48,954 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:05:48,954 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2021-07-13 20:05:48,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403052327] [2021-07-13 20:05:48,955 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-13 20:05:48,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:05:48,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-13 20:05:48,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=601, Unknown=0, NotChecked=0, Total=650 [2021-07-13 20:05:48,955 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) [2021-07-13 20:05:49,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:05:49,549 INFO L93 Difference]: Finished difference Result 1401 states and 2766 transitions. [2021-07-13 20:05:49,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 20:05:49,549 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 [2021-07-13 20:05:49,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:05:49,551 INFO L225 Difference]: With dead ends: 1401 [2021-07-13 20:05:49,551 INFO L226 Difference]: Without dead ends: 1248 [2021-07-13 20:05:49,551 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 128 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 276.6ms TimeCoverageRelationStatistics Valid=49, Invalid=601, Unknown=0, NotChecked=0, Total=650 [2021-07-13 20:05:49,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1248 states. [2021-07-13 20:05:49,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1248 to 945. [2021-07-13 20:05:49,559 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) [2021-07-13 20:05:49,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 945 states to 945 states and 2040 transitions. [2021-07-13 20:05:49,560 INFO L78 Accepts]: Start accepts. Automaton has 945 states and 2040 transitions. Word has length 106 [2021-07-13 20:05:49,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:05:49,560 INFO L482 AbstractCegarLoop]: Abstraction has 945 states and 2040 transitions. [2021-07-13 20:05:49,560 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) [2021-07-13 20:05:49,560 INFO L276 IsEmpty]: Start isEmpty. Operand 945 states and 2040 transitions. [2021-07-13 20:05:49,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-07-13 20:05:49,561 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:05:49,561 INFO L508 BasicCegarLoop]: trace histogram [24, 24, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:05:49,778 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-07-13 20:05:49,778 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:05:49,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:05:49,778 INFO L82 PathProgramCache]: Analyzing trace with hash -1087227581, now seen corresponding path program 68 times [2021-07-13 20:05:49,778 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:05:49,779 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587009334] [2021-07-13 20:05:49,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:05:49,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:05:50,641 INFO L134 CoverageAnalysis]: Checked inductivity of 1105 backedges. 529 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:50,641 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:05:50,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587009334] [2021-07-13 20:05:50,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587009334] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:50,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [88288166] [2021-07-13 20:05:50,641 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 [2021-07-13 20:05:50,686 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:05:50,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:05:50,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 51 conjunts are in the unsatisfiable core [2021-07-13 20:05:50,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:05:52,551 INFO L134 CoverageAnalysis]: Checked inductivity of 1105 backedges. 529 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:52,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [88288166] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:52,551 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:05:52,551 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 51] total 101 [2021-07-13 20:05:52,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538689269] [2021-07-13 20:05:52,551 INFO L462 AbstractCegarLoop]: Interpolant automaton has 102 states [2021-07-13 20:05:52,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:05:52,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2021-07-13 20:05:52,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1727, Invalid=8575, Unknown=0, NotChecked=0, Total=10302 [2021-07-13 20:05:52,552 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) [2021-07-13 20:06:36,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:06:36,125 INFO L93 Difference]: Finished difference Result 10381 states and 20557 transitions. [2021-07-13 20:06:36,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 676 states. [2021-07-13 20:06:36,125 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 [2021-07-13 20:06:36,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:06:36,134 INFO L225 Difference]: With dead ends: 10381 [2021-07-13 20:06:36,134 INFO L226 Difference]: Without dead ends: 8335 [2021-07-13 20:06:36,156 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 831 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 772 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303391 ImplicationChecksByTransitivity, 32290.8ms TimeCoverageRelationStatistics Valid=170817, Invalid=427485, Unknown=0, NotChecked=0, Total=598302 [2021-07-13 20:06:36,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8335 states. [2021-07-13 20:06:36,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8335 to 554. [2021-07-13 20:06:36,182 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) [2021-07-13 20:06:36,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 554 states to 554 states and 1145 transitions. [2021-07-13 20:06:36,183 INFO L78 Accepts]: Start accepts. Automaton has 554 states and 1145 transitions. Word has length 108 [2021-07-13 20:06:36,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:06:36,183 INFO L482 AbstractCegarLoop]: Abstraction has 554 states and 1145 transitions. [2021-07-13 20:06:36,183 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) [2021-07-13 20:06:36,183 INFO L276 IsEmpty]: Start isEmpty. Operand 554 states and 1145 transitions. [2021-07-13 20:06:36,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-07-13 20:06:36,184 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:06:36,184 INFO L508 BasicCegarLoop]: trace histogram [24, 24, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:06:36,400 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:06:36,400 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:06:36,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:06:36,400 INFO L82 PathProgramCache]: Analyzing trace with hash 447708557, now seen corresponding path program 69 times [2021-07-13 20:06:36,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:06:36,400 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031754487] [2021-07-13 20:06:36,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:06:36,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:06:36,765 INFO L134 CoverageAnalysis]: Checked inductivity of 1105 backedges. 553 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:36,765 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:06:36,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031754487] [2021-07-13 20:06:36,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031754487] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:36,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1107225491] [2021-07-13 20:06:36,765 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 [2021-07-13 20:06:36,817 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2021-07-13 20:06:36,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:06:36,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 51 conjunts are in the unsatisfiable core [2021-07-13 20:06:36,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:06:38,501 INFO L134 CoverageAnalysis]: Checked inductivity of 1105 backedges. 553 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:38,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1107225491] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:38,501 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:06:38,501 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 51] total 77 [2021-07-13 20:06:38,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419927209] [2021-07-13 20:06:38,502 INFO L462 AbstractCegarLoop]: Interpolant automaton has 78 states [2021-07-13 20:06:38,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:06:38,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2021-07-13 20:06:38,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1127, Invalid=4879, Unknown=0, NotChecked=0, Total=6006 [2021-07-13 20:06:38,503 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) [2021-07-13 20:06:42,304 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 13 [2021-07-13 20:07:05,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:07:05,849 INFO L93 Difference]: Finished difference Result 7211 states and 14397 transitions. [2021-07-13 20:07:05,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 677 states. [2021-07-13 20:07:05,849 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 [2021-07-13 20:07:05,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:07:05,856 INFO L225 Difference]: With dead ends: 7211 [2021-07-13 20:07:05,857 INFO L226 Difference]: Without dead ends: 7207 [2021-07-13 20:07:05,874 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 831 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 749 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293222 ImplicationChecksByTransitivity, 24569.9ms TimeCoverageRelationStatistics Valid=133727, Invalid=429523, Unknown=0, NotChecked=0, Total=563250 [2021-07-13 20:07:05,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7207 states. [2021-07-13 20:07:05,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7207 to 462. [2021-07-13 20:07:05,895 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) [2021-07-13 20:07:05,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 462 states to 462 states and 962 transitions. [2021-07-13 20:07:05,896 INFO L78 Accepts]: Start accepts. Automaton has 462 states and 962 transitions. Word has length 108 [2021-07-13 20:07:05,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:07:05,896 INFO L482 AbstractCegarLoop]: Abstraction has 462 states and 962 transitions. [2021-07-13 20:07:05,896 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) [2021-07-13 20:07:05,896 INFO L276 IsEmpty]: Start isEmpty. Operand 462 states and 962 transitions. [2021-07-13 20:07:05,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-07-13 20:07:05,896 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:07:05,897 INFO L508 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:07:06,113 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable71 [2021-07-13 20:07:06,113 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:07:06,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:07:06,113 INFO L82 PathProgramCache]: Analyzing trace with hash -2071368959, now seen corresponding path program 70 times [2021-07-13 20:07:06,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:07:06,113 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983289888] [2021-07-13 20:07:06,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:07:06,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:07:06,486 INFO L134 CoverageAnalysis]: Checked inductivity of 1152 backedges. 0 proven. 1152 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:06,486 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:07:06,486 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983289888] [2021-07-13 20:07:06,486 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983289888] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:06,486 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2010234246] [2021-07-13 20:07:06,486 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 [2021-07-13 20:07:06,550 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:07:06,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:07:06,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 99 conjunts are in the unsatisfiable core [2021-07-13 20:07:06,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:07:06,670 INFO L134 CoverageAnalysis]: Checked inductivity of 1152 backedges. 0 proven. 1152 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:06,670 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2010234246] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:06,670 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:07:06,670 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2021-07-13 20:07:06,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609848146] [2021-07-13 20:07:06,670 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-13 20:07:06,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:07:06,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-13 20:07:06,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=651, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:07:06,671 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) [2021-07-13 20:07:07,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:07:07,326 INFO L93 Difference]: Finished difference Result 1460 states and 2883 transitions. [2021-07-13 20:07:07,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 20:07:07,326 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 [2021-07-13 20:07:07,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:07:07,328 INFO L225 Difference]: With dead ends: 1460 [2021-07-13 20:07:07,328 INFO L226 Difference]: Without dead ends: 1301 [2021-07-13 20:07:07,328 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 133 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 295.7ms TimeCoverageRelationStatistics Valid=51, Invalid=651, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:07:07,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1301 states. [2021-07-13 20:07:07,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1301 to 985. [2021-07-13 20:07:07,336 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) [2021-07-13 20:07:07,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 985 states to 985 states and 2127 transitions. [2021-07-13 20:07:07,337 INFO L78 Accepts]: Start accepts. Automaton has 985 states and 2127 transitions. Word has length 110 [2021-07-13 20:07:07,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:07:07,337 INFO L482 AbstractCegarLoop]: Abstraction has 985 states and 2127 transitions. [2021-07-13 20:07:07,337 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) [2021-07-13 20:07:07,337 INFO L276 IsEmpty]: Start isEmpty. Operand 985 states and 2127 transitions. [2021-07-13 20:07:07,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-07-13 20:07:07,338 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:07:07,339 INFO L508 BasicCegarLoop]: trace histogram [25, 25, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:07:07,555 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:07:07,555 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:07:07,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:07:07,555 INFO L82 PathProgramCache]: Analyzing trace with hash -293975553, now seen corresponding path program 71 times [2021-07-13 20:07:07,556 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:07:07,556 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340540536] [2021-07-13 20:07:07,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:07:07,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:07:08,499 INFO L134 CoverageAnalysis]: Checked inductivity of 1201 backedges. 576 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:08,499 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:07:08,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340540536] [2021-07-13 20:07:08,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340540536] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:08,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756219190] [2021-07-13 20:07:08,499 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 [2021-07-13 20:07:08,551 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 26 check-sat command(s) [2021-07-13 20:07:08,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:07:08,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 53 conjunts are in the unsatisfiable core [2021-07-13 20:07:08,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:07:10,611 INFO L134 CoverageAnalysis]: Checked inductivity of 1201 backedges. 576 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:10,611 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [756219190] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:10,611 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:07:10,611 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 53] total 105 [2021-07-13 20:07:10,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008070711] [2021-07-13 20:07:10,611 INFO L462 AbstractCegarLoop]: Interpolant automaton has 106 states [2021-07-13 20:07:10,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:07:10,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2021-07-13 20:07:10,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1861, Invalid=9269, Unknown=0, NotChecked=0, Total=11130 [2021-07-13 20:07:10,613 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) [2021-07-13 20:07:57,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:07:57,647 INFO L93 Difference]: Finished difference Result 11166 states and 22119 transitions. [2021-07-13 20:07:57,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 729 states. [2021-07-13 20:07:57,647 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 [2021-07-13 20:07:57,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:07:57,658 INFO L225 Difference]: With dead ends: 11166 [2021-07-13 20:07:57,659 INFO L226 Difference]: Without dead ends: 8958 [2021-07-13 20:07:57,688 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 890 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 829 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354186 ImplicationChecksByTransitivity, 33340.8ms TimeCoverageRelationStatistics Valid=197709, Invalid=492021, Unknown=0, NotChecked=0, Total=689730 [2021-07-13 20:07:57,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8958 states. [2021-07-13 20:07:57,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8958 to 576. [2021-07-13 20:07:57,725 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) [2021-07-13 20:07:57,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 576 states to 576 states and 1191 transitions. [2021-07-13 20:07:57,726 INFO L78 Accepts]: Start accepts. Automaton has 576 states and 1191 transitions. Word has length 112 [2021-07-13 20:07:57,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:07:57,726 INFO L482 AbstractCegarLoop]: Abstraction has 576 states and 1191 transitions. [2021-07-13 20:07:57,726 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) [2021-07-13 20:07:57,726 INFO L276 IsEmpty]: Start isEmpty. Operand 576 states and 1191 transitions. [2021-07-13 20:07:57,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-07-13 20:07:57,727 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:07:57,727 INFO L508 BasicCegarLoop]: trace histogram [25, 25, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:07:57,943 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:07:57,943 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:07:57,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:07:57,944 INFO L82 PathProgramCache]: Analyzing trace with hash -1604407155, now seen corresponding path program 72 times [2021-07-13 20:07:57,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:07:57,944 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230877572] [2021-07-13 20:07:57,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:07:57,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:07:58,466 INFO L134 CoverageAnalysis]: Checked inductivity of 1201 backedges. 601 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:58,467 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:07:58,467 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230877572] [2021-07-13 20:07:58,467 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230877572] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:58,467 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1860569003] [2021-07-13 20:07:58,467 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 [2021-07-13 20:07:58,524 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 28 check-sat command(s) [2021-07-13 20:07:58,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:07:58,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 53 conjunts are in the unsatisfiable core [2021-07-13 20:07:58,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:08:00,293 INFO L134 CoverageAnalysis]: Checked inductivity of 1201 backedges. 601 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:00,293 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1860569003] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:00,293 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:08:00,293 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 53] total 80 [2021-07-13 20:08:00,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101586824] [2021-07-13 20:08:00,293 INFO L462 AbstractCegarLoop]: Interpolant automaton has 81 states [2021-07-13 20:08:00,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:08:00,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2021-07-13 20:08:00,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1211, Invalid=5269, Unknown=0, NotChecked=0, Total=6480 [2021-07-13 20:08:00,295 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) [2021-07-13 20:08:31,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:08:31,337 INFO L93 Difference]: Finished difference Result 7785 states and 15545 transitions. [2021-07-13 20:08:31,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 730 states. [2021-07-13 20:08:31,337 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 [2021-07-13 20:08:31,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:08:31,345 INFO L225 Difference]: With dead ends: 7785 [2021-07-13 20:08:31,345 INFO L226 Difference]: Without dead ends: 7781 [2021-07-13 20:08:31,371 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 890 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 805 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341817 ImplicationChecksByTransitivity, 27935.9ms TimeCoverageRelationStatistics Valid=154598, Invalid=495844, Unknown=0, NotChecked=0, Total=650442 [2021-07-13 20:08:31,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7781 states. [2021-07-13 20:08:31,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7781 to 480. [2021-07-13 20:08:31,395 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) [2021-07-13 20:08:31,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 480 states to 480 states and 1000 transitions. [2021-07-13 20:08:31,396 INFO L78 Accepts]: Start accepts. Automaton has 480 states and 1000 transitions. Word has length 112 [2021-07-13 20:08:31,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:08:31,396 INFO L482 AbstractCegarLoop]: Abstraction has 480 states and 1000 transitions. [2021-07-13 20:08:31,396 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) [2021-07-13 20:08:31,396 INFO L276 IsEmpty]: Start isEmpty. Operand 480 states and 1000 transitions. [2021-07-13 20:08:31,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-07-13 20:08:31,397 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:08:31,397 INFO L508 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:08:31,613 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:08:31,613 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:08:31,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:08:31,613 INFO L82 PathProgramCache]: Analyzing trace with hash 34618557, now seen corresponding path program 73 times [2021-07-13 20:08:31,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:08:31,613 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593750834] [2021-07-13 20:08:31,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:08:31,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:08:32,013 INFO L134 CoverageAnalysis]: Checked inductivity of 1250 backedges. 0 proven. 1250 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:32,013 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:08:32,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593750834] [2021-07-13 20:08:32,013 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593750834] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:32,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [422084847] [2021-07-13 20:08:32,013 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 20:08:32,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:08:32,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 103 conjunts are in the unsatisfiable core [2021-07-13 20:08:32,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:08:32,200 INFO L134 CoverageAnalysis]: Checked inductivity of 1250 backedges. 0 proven. 1250 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:32,201 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [422084847] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:32,201 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:08:32,201 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2021-07-13 20:08:32,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531484789] [2021-07-13 20:08:32,201 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-13 20:08:32,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:08:32,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-13 20:08:32,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=703, Unknown=0, NotChecked=0, Total=756 [2021-07-13 20:08:32,201 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) [2021-07-13 20:08:32,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:08:32,907 INFO L93 Difference]: Finished difference Result 1519 states and 3000 transitions. [2021-07-13 20:08:32,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 20:08:32,908 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 [2021-07-13 20:08:32,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:08:32,909 INFO L225 Difference]: With dead ends: 1519 [2021-07-13 20:08:32,909 INFO L226 Difference]: Without dead ends: 1354 [2021-07-13 20:08:32,910 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 138 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 325.1ms TimeCoverageRelationStatistics Valid=53, Invalid=703, Unknown=0, NotChecked=0, Total=756 [2021-07-13 20:08:32,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1354 states. [2021-07-13 20:08:32,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1354 to 1025. [2021-07-13 20:08:32,918 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) [2021-07-13 20:08:32,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1025 states to 1025 states and 2214 transitions. [2021-07-13 20:08:32,919 INFO L78 Accepts]: Start accepts. Automaton has 1025 states and 2214 transitions. Word has length 114 [2021-07-13 20:08:32,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:08:32,919 INFO L482 AbstractCegarLoop]: Abstraction has 1025 states and 2214 transitions. [2021-07-13 20:08:32,919 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) [2021-07-13 20:08:32,919 INFO L276 IsEmpty]: Start isEmpty. Operand 1025 states and 2214 transitions. [2021-07-13 20:08:32,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-07-13 20:08:32,920 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:08:32,920 INFO L508 BasicCegarLoop]: trace histogram [26, 26, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:08:33,136 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2021-07-13 20:08:33,137 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:08:33,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:08:33,137 INFO L82 PathProgramCache]: Analyzing trace with hash 979201211, now seen corresponding path program 74 times [2021-07-13 20:08:33,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:08:33,137 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930692165] [2021-07-13 20:08:33,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:08:33,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:08:34,165 INFO L134 CoverageAnalysis]: Checked inductivity of 1301 backedges. 625 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:34,165 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:08:34,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930692165] [2021-07-13 20:08:34,165 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930692165] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:34,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1432568500] [2021-07-13 20:08:34,165 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 [2021-07-13 20:08:34,213 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:08:34,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:08:34,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 55 conjunts are in the unsatisfiable core [2021-07-13 20:08:34,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:08:36,282 INFO L134 CoverageAnalysis]: Checked inductivity of 1301 backedges. 625 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:36,282 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1432568500] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:36,282 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:08:36,283 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 55] total 109 [2021-07-13 20:08:36,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923615665] [2021-07-13 20:08:36,283 INFO L462 AbstractCegarLoop]: Interpolant automaton has 110 states [2021-07-13 20:08:36,283 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:08:36,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2021-07-13 20:08:36,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2000, Invalid=9990, Unknown=0, NotChecked=0, Total=11990 [2021-07-13 20:08:36,285 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) [2021-07-13 20:09:25,421 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2021-07-13 20:09:32,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:09:32,183 INFO L93 Difference]: Finished difference Result 11979 states and 23737 transitions. [2021-07-13 20:09:32,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 784 states. [2021-07-13 20:09:32,183 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 [2021-07-13 20:09:32,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:09:32,193 INFO L225 Difference]: With dead ends: 11979 [2021-07-13 20:09:32,193 INFO L226 Difference]: Without dead ends: 9603 [2021-07-13 20:09:32,218 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 951 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 888 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 411127 ImplicationChecksByTransitivity, 39495.9ms TimeCoverageRelationStatistics Valid=227665, Invalid=563545, Unknown=0, NotChecked=0, Total=791210 [2021-07-13 20:09:32,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9603 states. [2021-07-13 20:09:32,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9603 to 598. [2021-07-13 20:09:32,249 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) [2021-07-13 20:09:32,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 598 states to 598 states and 1237 transitions. [2021-07-13 20:09:32,249 INFO L78 Accepts]: Start accepts. Automaton has 598 states and 1237 transitions. Word has length 116 [2021-07-13 20:09:32,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:09:32,249 INFO L482 AbstractCegarLoop]: Abstraction has 598 states and 1237 transitions. [2021-07-13 20:09:32,249 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) [2021-07-13 20:09:32,250 INFO L276 IsEmpty]: Start isEmpty. Operand 598 states and 1237 transitions. [2021-07-13 20:09:32,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-07-13 20:09:32,250 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:09:32,250 INFO L508 BasicCegarLoop]: trace histogram [26, 26, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:09:32,466 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:09:32,467 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:09:32,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:09:32,467 INFO L82 PathProgramCache]: Analyzing trace with hash 1164539021, now seen corresponding path program 75 times [2021-07-13 20:09:32,467 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:09:32,467 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559542845] [2021-07-13 20:09:32,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:09:32,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:09:32,859 INFO L134 CoverageAnalysis]: Checked inductivity of 1301 backedges. 651 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:09:32,859 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:09:32,859 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559542845] [2021-07-13 20:09:32,859 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559542845] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:32,859 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [316702007] [2021-07-13 20:09:32,859 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 [2021-07-13 20:09:32,916 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 29 check-sat command(s) [2021-07-13 20:09:32,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:09:32,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 55 conjunts are in the unsatisfiable core [2021-07-13 20:09:32,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:09:34,814 INFO L134 CoverageAnalysis]: Checked inductivity of 1301 backedges. 651 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:09:34,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [316702007] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:34,814 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:09:34,814 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 55] total 83 [2021-07-13 20:09:34,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005163837] [2021-07-13 20:09:34,815 INFO L462 AbstractCegarLoop]: Interpolant automaton has 84 states [2021-07-13 20:09:34,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:09:34,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2021-07-13 20:09:34,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1298, Invalid=5674, Unknown=0, NotChecked=0, Total=6972 [2021-07-13 20:09:34,816 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) [2021-07-13 20:09:46,732 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 14 [2021-07-13 20:10:11,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:10:11,853 INFO L93 Difference]: Finished difference Result 8381 states and 16737 transitions. [2021-07-13 20:10:11,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 785 states. [2021-07-13 20:10:11,853 INFO L78 Accepts]: Start accepts. Automaton has 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) Word has length 116 [2021-07-13 20:10:11,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:10:11,861 INFO L225 Difference]: With dead ends: 8381 [2021-07-13 20:10:11,861 INFO L226 Difference]: Without dead ends: 8377 [2021-07-13 20:10:11,890 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 951 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 863 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 396220 ImplicationChecksByTransitivity, 32830.7ms TimeCoverageRelationStatistics Valid=177824, Invalid=569536, Unknown=0, NotChecked=0, Total=747360 [2021-07-13 20:10:11,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8377 states. [2021-07-13 20:10:11,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8377 to 498. [2021-07-13 20:10:11,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 498 states, 497 states have (on average 2.0885311871227366) internal successors, (1038), 497 states have internal predecessors, (1038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:11,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 498 states to 498 states and 1038 transitions. [2021-07-13 20:10:11,916 INFO L78 Accepts]: Start accepts. Automaton has 498 states and 1038 transitions. Word has length 116 [2021-07-13 20:10:11,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:10:11,916 INFO L482 AbstractCegarLoop]: Abstraction has 498 states and 1038 transitions. [2021-07-13 20:10:11,916 INFO L483 AbstractCegarLoop]: Interpolant automaton has 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) [2021-07-13 20:10:11,916 INFO L276 IsEmpty]: Start isEmpty. Operand 498 states and 1038 transitions. [2021-07-13 20:10:11,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-07-13 20:10:11,917 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:10:11,917 INFO L508 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:10:12,132 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:10:12,133 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:10:12,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:10:12,133 INFO L82 PathProgramCache]: Analyzing trace with hash -508190599, now seen corresponding path program 76 times [2021-07-13 20:10:12,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:10:12,133 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145726410] [2021-07-13 20:10:12,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:10:12,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:10:12,504 INFO L134 CoverageAnalysis]: Checked inductivity of 1352 backedges. 0 proven. 1352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:10:12,504 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:10:12,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145726410] [2021-07-13 20:10:12,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145726410] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:10:12,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [266181150] [2021-07-13 20:10:12,504 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 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:10:12,551 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:10:12,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:10:12,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 107 conjunts are in the unsatisfiable core [2021-07-13 20:10:12,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:10:12,677 INFO L134 CoverageAnalysis]: Checked inductivity of 1352 backedges. 0 proven. 1352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:10:12,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [266181150] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:10:12,677 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:10:12,677 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2021-07-13 20:10:12,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021079907] [2021-07-13 20:10:12,677 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-13 20:10:12,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:10:12,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-13 20:10:12,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=757, Unknown=0, NotChecked=0, Total=812 [2021-07-13 20:10:12,678 INFO L87 Difference]: Start difference. First operand 498 states and 1038 transitions. Second operand has 29 states, 29 states have (on average 4.068965517241379) internal successors, (118), 29 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) [2021-07-13 20:10:13,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:10:13,416 INFO L93 Difference]: Finished difference Result 1578 states and 3117 transitions. [2021-07-13 20:10:13,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-13 20:10:13,416 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 4.068965517241379) internal successors, (118), 29 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 118 [2021-07-13 20:10:13,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:10:13,418 INFO L225 Difference]: With dead ends: 1578 [2021-07-13 20:10:13,418 INFO L226 Difference]: Without dead ends: 1407 [2021-07-13 20:10:13,418 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 143 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 330.2ms TimeCoverageRelationStatistics Valid=55, Invalid=757, Unknown=0, NotChecked=0, Total=812 [2021-07-13 20:10:13,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1407 states. [2021-07-13 20:10:13,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1407 to 1065. [2021-07-13 20:10:13,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1065 states, 1064 states have (on average 2.162593984962406) internal successors, (2301), 1064 states have internal predecessors, (2301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:13,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1065 states to 1065 states and 2301 transitions. [2021-07-13 20:10:13,428 INFO L78 Accepts]: Start accepts. Automaton has 1065 states and 2301 transitions. Word has length 118 [2021-07-13 20:10:13,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:10:13,428 INFO L482 AbstractCegarLoop]: Abstraction has 1065 states and 2301 transitions. [2021-07-13 20:10:13,428 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 4.068965517241379) internal successors, (118), 29 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) [2021-07-13 20:10:13,428 INFO L276 IsEmpty]: Start isEmpty. Operand 1065 states and 2301 transitions. [2021-07-13 20:10:13,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-07-13 20:10:13,429 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:10:13,429 INFO L508 BasicCegarLoop]: trace histogram [27, 27, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:10:13,646 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2021-07-13 20:10:13,646 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:10:13,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:10:13,646 INFO L82 PathProgramCache]: Analyzing trace with hash -808541833, now seen corresponding path program 77 times [2021-07-13 20:10:13,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:10:13,646 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479357378] [2021-07-13 20:10:13,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:10:13,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:10:14,737 INFO L134 CoverageAnalysis]: Checked inductivity of 1405 backedges. 676 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:10:14,737 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:10:14,737 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479357378] [2021-07-13 20:10:14,737 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [479357378] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:10:14,737 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390190182] [2021-07-13 20:10:14,737 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:10:14,792 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 28 check-sat command(s) [2021-07-13 20:10:14,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:10:14,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 57 conjunts are in the unsatisfiable core [2021-07-13 20:10:14,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:10:16,937 INFO L134 CoverageAnalysis]: Checked inductivity of 1405 backedges. 676 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:10:16,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1390190182] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:10:16,937 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:10:16,938 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 57] total 113 [2021-07-13 20:10:16,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691281989] [2021-07-13 20:10:16,938 INFO L462 AbstractCegarLoop]: Interpolant automaton has 114 states [2021-07-13 20:10:16,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:10:16,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2021-07-13 20:10:16,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2144, Invalid=10738, Unknown=0, NotChecked=0, Total=12882 [2021-07-13 20:10:16,940 INFO L87 Difference]: Start difference. First operand 1065 states and 2301 transitions. Second operand has 114 states, 114 states have (on average 2.0526315789473686) internal successors, (234), 113 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:21,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:11:21,372 INFO L93 Difference]: Finished difference Result 12820 states and 25411 transitions. [2021-07-13 20:11:21,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 841 states. [2021-07-13 20:11:21,373 INFO L78 Accepts]: Start accepts. Automaton has has 114 states, 114 states have (on average 2.0526315789473686) internal successors, (234), 113 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2021-07-13 20:11:21,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:11:21,386 INFO L225 Difference]: With dead ends: 12820 [2021-07-13 20:11:21,386 INFO L226 Difference]: Without dead ends: 10270 [2021-07-13 20:11:21,420 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 1014 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 949 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 474693 ImplicationChecksByTransitivity, 44081.1ms TimeCoverageRelationStatistics Valid=260910, Invalid=642540, Unknown=0, NotChecked=0, Total=903450 [2021-07-13 20:11:21,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10270 states. [2021-07-13 20:11:21,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10270 to 620. [2021-07-13 20:11:21,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 620 states, 619 states have (on average 2.0726978998384493) internal successors, (1283), 619 states have internal predecessors, (1283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:21,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 620 states to 620 states and 1283 transitions. [2021-07-13 20:11:21,461 INFO L78 Accepts]: Start accepts. Automaton has 620 states and 1283 transitions. Word has length 120 [2021-07-13 20:11:21,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:11:21,461 INFO L482 AbstractCegarLoop]: Abstraction has 620 states and 1283 transitions. [2021-07-13 20:11:21,462 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 114 states, 114 states have (on average 2.0526315789473686) internal successors, (234), 113 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:21,462 INFO L276 IsEmpty]: Start isEmpty. Operand 620 states and 1283 transitions. [2021-07-13 20:11:21,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-07-13 20:11:21,463 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:11:21,463 INFO L508 BasicCegarLoop]: trace histogram [27, 27, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:11:21,679 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-07-13 20:11:21,679 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:11:21,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:11:21,679 INFO L82 PathProgramCache]: Analyzing trace with hash -2002843251, now seen corresponding path program 78 times [2021-07-13 20:11:21,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:11:21,679 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095777327] [2021-07-13 20:11:21,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:11:21,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:11:22,137 INFO L134 CoverageAnalysis]: Checked inductivity of 1405 backedges. 703 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:11:22,137 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:11:22,138 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095777327] [2021-07-13 20:11:22,138 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095777327] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:11:22,138 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1735838149] [2021-07-13 20:11:22,138 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:11:22,199 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 30 check-sat command(s) [2021-07-13 20:11:22,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:11:22,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 57 conjunts are in the unsatisfiable core [2021-07-13 20:11:22,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:11:24,287 INFO L134 CoverageAnalysis]: Checked inductivity of 1405 backedges. 703 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:11:24,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1735838149] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:11:24,287 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:11:24,287 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 57] total 86 [2021-07-13 20:11:24,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056357587] [2021-07-13 20:11:24,287 INFO L462 AbstractCegarLoop]: Interpolant automaton has 87 states [2021-07-13 20:11:24,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:11:24,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2021-07-13 20:11:24,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1388, Invalid=6094, Unknown=0, NotChecked=0, Total=7482 [2021-07-13 20:11:24,289 INFO L87 Difference]: Start difference. First operand 620 states and 1283 transitions. Second operand has 87 states, 87 states have (on average 2.6436781609195403) internal successors, (230), 86 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:36,495 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 14 [2021-07-13 20:11:49,150 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 14 [2021-07-13 20:11:58,246 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 14 [2021-07-13 20:12:03,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:12:03,259 INFO L93 Difference]: Finished difference Result 8999 states and 17973 transitions. [2021-07-13 20:12:03,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 842 states. [2021-07-13 20:12:03,259 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 87 states have (on average 2.6436781609195403) internal successors, (230), 86 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2021-07-13 20:12:03,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:12:03,269 INFO L225 Difference]: With dead ends: 8999 [2021-07-13 20:12:03,270 INFO L226 Difference]: Without dead ends: 8995 [2021-07-13 20:12:03,299 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 1014 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 923 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 456877 ImplicationChecksByTransitivity, 34366.2ms TimeCoverageRelationStatistics Valid=203576, Invalid=651124, Unknown=0, NotChecked=0, Total=854700 [2021-07-13 20:12:03,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8995 states. [2021-07-13 20:12:03,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8995 to 516. [2021-07-13 20:12:03,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 516 states, 515 states have (on average 2.0893203883495146) internal successors, (1076), 515 states have internal predecessors, (1076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:03,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 516 states to 516 states and 1076 transitions. [2021-07-13 20:12:03,334 INFO L78 Accepts]: Start accepts. Automaton has 516 states and 1076 transitions. Word has length 120 [2021-07-13 20:12:03,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:12:03,335 INFO L482 AbstractCegarLoop]: Abstraction has 516 states and 1076 transitions. [2021-07-13 20:12:03,335 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 87 states, 87 states have (on average 2.6436781609195403) internal successors, (230), 86 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:03,335 INFO L276 IsEmpty]: Start isEmpty. Operand 516 states and 1076 transitions. [2021-07-13 20:12:03,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-07-13 20:12:03,344 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:12:03,344 INFO L508 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:12:03,561 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:12:03,561 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:12:03,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:12:03,561 INFO L82 PathProgramCache]: Analyzing trace with hash -542337483, now seen corresponding path program 79 times [2021-07-13 20:12:03,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:12:03,561 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040687102] [2021-07-13 20:12:03,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:12:03,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:12:03,995 INFO L134 CoverageAnalysis]: Checked inductivity of 1458 backedges. 0 proven. 1458 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:12:03,995 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:12:03,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040687102] [2021-07-13 20:12:03,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040687102] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:12:03,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131778198] [2021-07-13 20:12:03,995 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:12:04,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:12:04,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 111 conjunts are in the unsatisfiable core [2021-07-13 20:12:04,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:12:04,174 INFO L134 CoverageAnalysis]: Checked inductivity of 1458 backedges. 0 proven. 1458 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:12:04,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [131778198] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:12:04,175 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:12:04,175 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2021-07-13 20:12:04,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803356794] [2021-07-13 20:12:04,175 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-07-13 20:12:04,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:12:04,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-07-13 20:12:04,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=813, Unknown=0, NotChecked=0, Total=870 [2021-07-13 20:12:04,175 INFO L87 Difference]: Start difference. First operand 516 states and 1076 transitions. Second operand has 30 states, 30 states have (on average 4.066666666666666) internal successors, (122), 30 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) [2021-07-13 20:12:04,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:12:04,961 INFO L93 Difference]: Finished difference Result 1637 states and 3234 transitions. [2021-07-13 20:12:04,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-13 20:12:04,961 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 4.066666666666666) internal successors, (122), 30 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 122 [2021-07-13 20:12:04,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:12:04,963 INFO L225 Difference]: With dead ends: 1637 [2021-07-13 20:12:04,963 INFO L226 Difference]: Without dead ends: 1460 [2021-07-13 20:12:04,963 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 148 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 352.9ms TimeCoverageRelationStatistics Valid=57, Invalid=813, Unknown=0, NotChecked=0, Total=870 [2021-07-13 20:12:04,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1460 states. [2021-07-13 20:12:04,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1460 to 1105. [2021-07-13 20:12:04,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1105 states, 1104 states have (on average 2.1630434782608696) internal successors, (2388), 1104 states have internal predecessors, (2388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:04,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1105 states to 1105 states and 2388 transitions. [2021-07-13 20:12:04,973 INFO L78 Accepts]: Start accepts. Automaton has 1105 states and 2388 transitions. Word has length 122 [2021-07-13 20:12:04,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:12:04,973 INFO L482 AbstractCegarLoop]: Abstraction has 1105 states and 2388 transitions. [2021-07-13 20:12:04,973 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 4.066666666666666) internal successors, (122), 30 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) [2021-07-13 20:12:04,973 INFO L276 IsEmpty]: Start isEmpty. Operand 1105 states and 2388 transitions. [2021-07-13 20:12:04,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-07-13 20:12:04,974 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:12:04,975 INFO L508 BasicCegarLoop]: trace histogram [28, 28, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:12:05,191 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:12:05,191 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:12:05,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:12:05,192 INFO L82 PathProgramCache]: Analyzing trace with hash 658565171, now seen corresponding path program 80 times [2021-07-13 20:12:05,192 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:12:05,192 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685088090] [2021-07-13 20:12:05,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:12:05,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:12:06,293 INFO L134 CoverageAnalysis]: Checked inductivity of 1513 backedges. 729 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:12:06,293 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:12:06,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685088090] [2021-07-13 20:12:06,293 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685088090] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:12:06,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1716993824] [2021-07-13 20:12:06,293 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 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:12:06,342 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:12:06,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:12:06,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 59 conjunts are in the unsatisfiable core [2021-07-13 20:12:06,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:12:08,860 INFO L134 CoverageAnalysis]: Checked inductivity of 1513 backedges. 729 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:12:08,861 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1716993824] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:12:08,861 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:12:08,861 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 59] total 117 [2021-07-13 20:12:08,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972492373] [2021-07-13 20:12:08,861 INFO L462 AbstractCegarLoop]: Interpolant automaton has 118 states [2021-07-13 20:12:08,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:12:08,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2021-07-13 20:12:08,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2293, Invalid=11513, Unknown=0, NotChecked=0, Total=13806 [2021-07-13 20:12:08,863 INFO L87 Difference]: Start difference. First operand 1105 states and 2388 transitions. Second operand has 118 states, 118 states have (on average 2.0508474576271185) internal successors, (242), 117 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:12,938 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 12 Received shutdown request... [2021-07-13 20:12:44,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 547 states. [2021-07-13 20:12:44,232 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:12:44,233 WARN L547 AbstractCegarLoop]: Verification canceled [2021-07-13 20:12:44,234 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-07-13 20:12:44,236 WARN L196 ceAbstractionStarter]: Timeout [2021-07-13 20:12:44,236 INFO L202 PluginConnector]: Adding new model figure1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.07 08:12:44 BasicIcfg [2021-07-13 20:12:44,236 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-07-13 20:12:44,257 INFO L168 Benchmark]: Toolchain (without parser) took 878350.07 ms. Allocated memory was 195.0 MB in the beginning and 2.4 GB in the end (delta: 2.2 GB). Free memory was 176.1 MB in the beginning and 1.1 GB in the end (delta: -932.8 MB). Peak memory consumption was 1.3 GB. Max. memory is 8.0 GB. [2021-07-13 20:12:44,257 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.09 ms. Allocated memory is still 195.0 MB. Free memory is still 177.1 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-07-13 20:12:44,257 INFO L168 Benchmark]: Boogie Procedure Inliner took 21.64 ms. Allocated memory is still 195.0 MB. Free memory was 176.0 MB in the beginning and 174.6 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-07-13 20:12:44,257 INFO L168 Benchmark]: Boogie Preprocessor took 10.85 ms. Allocated memory is still 195.0 MB. Free memory was 174.6 MB in the beginning and 173.7 MB in the end (delta: 913.9 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-07-13 20:12:44,257 INFO L168 Benchmark]: RCFGBuilder took 170.47 ms. Allocated memory is still 195.0 MB. Free memory was 173.5 MB in the beginning and 162.2 MB in the end (delta: 11.4 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. [2021-07-13 20:12:44,257 INFO L168 Benchmark]: TraceAbstraction took 878141.23 ms. Allocated memory was 195.0 MB in the beginning and 2.4 GB in the end (delta: 2.2 GB). Free memory was 161.7 MB in the beginning and 1.1 GB in the end (delta: -947.2 MB). Peak memory consumption was 1.3 GB. Max. memory is 8.0 GB. [2021-07-13 20:12:44,257 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.09 ms. Allocated memory is still 195.0 MB. Free memory is still 177.1 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 21.64 ms. Allocated memory is still 195.0 MB. Free memory was 176.0 MB in the beginning and 174.6 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 10.85 ms. Allocated memory is still 195.0 MB. Free memory was 174.6 MB in the beginning and 173.7 MB in the end (delta: 913.9 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 170.47 ms. Allocated memory is still 195.0 MB. Free memory was 173.5 MB in the beginning and 162.2 MB in the end (delta: 11.4 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. * TraceAbstraction took 878141.23 ms. Allocated memory was 195.0 MB in the beginning and 2.4 GB in the end (delta: 2.2 GB). Free memory was 161.7 MB in the beginning and 1.1 GB in the end (delta: -947.2 MB). Peak memory consumption was 1.3 GB. 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 (1105states) and FLOYD_HOARE automaton (currently 547 states, 118 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 661 known predicates. - 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: 878085.3ms, OverallIterations: 83, TraceHistogramMax: 28, EmptinessCheckTime: 117.4ms, AutomataDifference: 782209.3ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 14.3ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 7832 SDtfs, 49687 SDslu, 136737 SDs, 0 SdLazy, 144626 SolverSat, 8024 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 60412.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 25642 GetRequests, 4755 SyntacticMatches, 54 SemanticMatches, 20832 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5998143 ImplicationChecksByTransitivity, 634543.2ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=1105occurred in iteration=82, InterpolantAutomatonStates: 17585, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 1134.1ms AutomataMinimizationTime, 82 MinimizatonAttempts, 186147 StatesRemovedByMinimization, 82 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 441.7ms SsaConstructionTime, 2138.1ms SatisfiabilityAnalysisTime, 72108.1ms InterpolantComputationTime, 11370 NumberOfCodeBlocks, 11370 NumberOfCodeBlocksAsserted, 801 NumberOfCheckSat, 11206 ConstructedInterpolants, 0 QuantifiedInterpolants, 82122 SizeOfPredicates, 243 NumberOfNonLiveVariables, 14715 ConjunctsInSsa, 3321 ConjunctsInUnsatCore, 164 InterpolantComputations, 2 PerfectInterpolantSequences, 27017/83269 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