/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/float-benchs/zonotope_3.c.p+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 03:42:27,780 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 03:42:27,783 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 03:42:27,840 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 03:42:27,841 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 03:42:27,847 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 03:42:27,851 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 03:42:27,859 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 03:42:27,862 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 03:42:27,868 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 03:42:27,870 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 03:42:27,871 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 03:42:27,872 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 03:42:27,875 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 03:42:27,877 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 03:42:27,879 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 03:42:27,880 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 03:42:27,884 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 03:42:27,905 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 03:42:27,913 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 03:42:27,915 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 03:42:27,918 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 03:42:27,919 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 03:42:27,921 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 03:42:27,930 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 03:42:27,942 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 03:42:27,943 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 03:42:27,944 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 03:42:27,950 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 03:42:28,003 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 03:42:28,003 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 03:42:28,008 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 03:42:28,009 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 03:42:28,009 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 03:42:28,009 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 03:42:28,009 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 03:42:28,009 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 03:42:28,010 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 03:42:28,010 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 03:42:28,011 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 03:42:28,012 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 03:42:28,012 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 03:42:28,012 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 03:42:28,012 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 03:42:28,012 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 03:42:28,013 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 03:42:28,013 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 03:42:28,013 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 03:42:28,013 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 03:42:28,014 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 03:42:28,014 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 03:42:28,014 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 03:42:28,015 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 03:42:28,015 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 03:42:28,015 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 03:42:28,496 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 03:42:28,539 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 03:42:28,543 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 03:42:28,544 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 03:42:28,547 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 03:42:28,549 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/float-benchs/zonotope_3.c.p+cfa-reducer.c [2020-12-22 03:42:28,644 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c0e7a76d2/a56a8db41e3f4e10931469a1de3dde34/FLAG8207551c4 [2020-12-22 03:42:29,307 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 03:42:29,307 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/float-benchs/zonotope_3.c.p+cfa-reducer.c [2020-12-22 03:42:29,320 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c0e7a76d2/a56a8db41e3f4e10931469a1de3dde34/FLAG8207551c4 [2020-12-22 03:42:29,665 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c0e7a76d2/a56a8db41e3f4e10931469a1de3dde34 [2020-12-22 03:42:29,668 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 03:42:29,670 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 03:42:29,672 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 03:42:29,672 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 03:42:29,677 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 03:42:29,678 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 03:42:29" (1/1) ... [2020-12-22 03:42:29,679 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@42d7546 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:42:29, skipping insertion in model container [2020-12-22 03:42:29,679 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 03:42:29" (1/1) ... [2020-12-22 03:42:29,688 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 03:42:29,711 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 03:42:29,898 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/float-benchs/zonotope_3.c.p+cfa-reducer.c[2717,2730] [2020-12-22 03:42:29,906 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 03:42:29,924 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 03:42:29,985 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/float-benchs/zonotope_3.c.p+cfa-reducer.c[2717,2730] [2020-12-22 03:42:29,987 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 03:42:30,023 INFO L208 MainTranslator]: Completed translation [2020-12-22 03:42:30,024 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:42:30 WrapperNode [2020-12-22 03:42:30,024 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 03:42:30,026 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 03:42:30,026 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 03:42:30,026 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 03:42:30,037 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:42:30" (1/1) ... [2020-12-22 03:42:30,051 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:42:30" (1/1) ... [2020-12-22 03:42:30,074 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 03:42:30,075 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 03:42:30,076 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 03:42:30,076 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 03:42:30,085 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:42:30" (1/1) ... [2020-12-22 03:42:30,085 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:42:30" (1/1) ... [2020-12-22 03:42:30,087 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:42:30" (1/1) ... [2020-12-22 03:42:30,088 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:42:30" (1/1) ... [2020-12-22 03:42:30,094 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:42:30" (1/1) ... [2020-12-22 03:42:30,096 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:42:30" (1/1) ... [2020-12-22 03:42:30,098 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:42:30" (1/1) ... [2020-12-22 03:42:30,101 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 03:42:30,102 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 03:42:30,102 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 03:42:30,102 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 03:42:30,103 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:42:30" (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 [2020-12-22 03:42:30,225 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 03:42:30,226 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 03:42:30,226 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 03:42:30,226 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 03:42:30,561 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 03:42:30,561 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2020-12-22 03:42:30,563 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 03:42:30 BoogieIcfgContainer [2020-12-22 03:42:30,563 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 03:42:30,565 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 03:42:30,565 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 03:42:30,568 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 03:42:30,569 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 03:42:29" (1/3) ... [2020-12-22 03:42:30,570 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d7772f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 03:42:30, skipping insertion in model container [2020-12-22 03:42:30,570 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:42:30" (2/3) ... [2020-12-22 03:42:30,570 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d7772f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 03:42:30, skipping insertion in model container [2020-12-22 03:42:30,570 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 03:42:30" (3/3) ... [2020-12-22 03:42:30,572 INFO L111 eAbstractionObserver]: Analyzing ICFG zonotope_3.c.p+cfa-reducer.c [2020-12-22 03:42:30,580 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 03:42:30,585 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 03:42:30,611 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 03:42:30,645 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 03:42:30,645 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 03:42:30,645 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 03:42:30,646 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 03:42:30,646 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 03:42:30,646 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 03:42:30,646 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 03:42:30,646 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 03:42:30,667 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2020-12-22 03:42:30,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-22 03:42:30,674 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:42:30,675 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:42:30,675 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:42:30,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:42:30,684 INFO L82 PathProgramCache]: Analyzing trace with hash 739680105, now seen corresponding path program 1 times [2020-12-22 03:42:30,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:42:30,697 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227645402] [2020-12-22 03:42:30,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:42:30,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:42:30,930 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:30,930 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227645402] [2020-12-22 03:42:30,931 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 03:42:30,932 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 03:42:30,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352560556] [2020-12-22 03:42:30,937 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 03:42:30,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:42:30,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 03:42:30,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 03:42:30,965 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 3 states. [2020-12-22 03:42:31,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:42:31,002 INFO L93 Difference]: Finished difference Result 35 states and 46 transitions. [2020-12-22 03:42:31,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 03:42:31,005 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2020-12-22 03:42:31,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:42:31,015 INFO L225 Difference]: With dead ends: 35 [2020-12-22 03:42:31,016 INFO L226 Difference]: Without dead ends: 19 [2020-12-22 03:42:31,019 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 03:42:31,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-12-22 03:42:31,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 15. [2020-12-22 03:42:31,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-12-22 03:42:31,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 19 transitions. [2020-12-22 03:42:31,058 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 19 transitions. Word has length 8 [2020-12-22 03:42:31,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:42:31,058 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 19 transitions. [2020-12-22 03:42:31,059 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 03:42:31,059 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 19 transitions. [2020-12-22 03:42:31,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-22 03:42:31,059 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:42:31,060 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:42:31,060 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 03:42:31,060 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:42:31,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:42:31,061 INFO L82 PathProgramCache]: Analyzing trace with hash 573752309, now seen corresponding path program 1 times [2020-12-22 03:42:31,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:42:31,062 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437377088] [2020-12-22 03:42:31,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:42:31,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:42:31,162 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:31,163 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437377088] [2020-12-22 03:42:31,166 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 03:42:31,167 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 03:42:31,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033213141] [2020-12-22 03:42:31,168 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 03:42:31,169 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:42:31,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 03:42:31,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 03:42:31,170 INFO L87 Difference]: Start difference. First operand 15 states and 19 transitions. Second operand 3 states. [2020-12-22 03:42:31,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:42:31,205 INFO L93 Difference]: Finished difference Result 28 states and 36 transitions. [2020-12-22 03:42:31,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 03:42:31,208 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2020-12-22 03:42:31,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:42:31,208 INFO L225 Difference]: With dead ends: 28 [2020-12-22 03:42:31,208 INFO L226 Difference]: Without dead ends: 14 [2020-12-22 03:42:31,211 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 03:42:31,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-12-22 03:42:31,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-12-22 03:42:31,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-12-22 03:42:31,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2020-12-22 03:42:31,217 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 12 [2020-12-22 03:42:31,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:42:31,217 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2020-12-22 03:42:31,217 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 03:42:31,217 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2020-12-22 03:42:31,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-22 03:42:31,218 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:42:31,218 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:42:31,219 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 03:42:31,219 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:42:31,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:42:31,220 INFO L82 PathProgramCache]: Analyzing trace with hash 1667531312, now seen corresponding path program 1 times [2020-12-22 03:42:31,220 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:42:31,220 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826569038] [2020-12-22 03:42:31,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:42:31,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:42:31,284 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:31,284 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826569038] [2020-12-22 03:42:31,285 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30172230] [2020-12-22 03:42:31,285 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 [2020-12-22 03:42:31,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:42:31,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-22 03:42:31,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:42:31,503 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:31,503 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:42:31,504 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-22 03:42:31,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116225601] [2020-12-22 03:42:31,505 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 03:42:31,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:42:31,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 03:42:31,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 03:42:31,507 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand 5 states. [2020-12-22 03:42:31,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:42:31,541 INFO L93 Difference]: Finished difference Result 28 states and 32 transitions. [2020-12-22 03:42:31,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 03:42:31,542 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2020-12-22 03:42:31,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:42:31,543 INFO L225 Difference]: With dead ends: 28 [2020-12-22 03:42:31,543 INFO L226 Difference]: Without dead ends: 21 [2020-12-22 03:42:31,544 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 03:42:31,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-12-22 03:42:31,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 18. [2020-12-22 03:42:31,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-12-22 03:42:31,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2020-12-22 03:42:31,549 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 12 [2020-12-22 03:42:31,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:42:31,549 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2020-12-22 03:42:31,549 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 03:42:31,550 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2020-12-22 03:42:31,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-22 03:42:31,553 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:42:31,553 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:42:31,767 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-12-22 03:42:31,768 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:42:31,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:42:31,770 INFO L82 PathProgramCache]: Analyzing trace with hash -1478121097, now seen corresponding path program 2 times [2020-12-22 03:42:31,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:42:31,770 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996670194] [2020-12-22 03:42:31,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:42:31,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:42:31,902 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-22 03:42:31,902 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996670194] [2020-12-22 03:42:31,902 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1180594039] [2020-12-22 03:42:31,903 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:42:31,966 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-12-22 03:42:31,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:42:31,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-22 03:42:31,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:42:32,009 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 03:42:32,010 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 03:42:32,010 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2020-12-22 03:42:32,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066027608] [2020-12-22 03:42:32,011 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 03:42:32,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:42:32,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 03:42:32,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-12-22 03:42:32,013 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand 4 states. [2020-12-22 03:42:32,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:42:32,034 INFO L93 Difference]: Finished difference Result 22 states and 23 transitions. [2020-12-22 03:42:32,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 03:42:32,035 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2020-12-22 03:42:32,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:42:32,036 INFO L225 Difference]: With dead ends: 22 [2020-12-22 03:42:32,036 INFO L226 Difference]: Without dead ends: 18 [2020-12-22 03:42:32,037 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-12-22 03:42:32,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-12-22 03:42:32,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-12-22 03:42:32,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-12-22 03:42:32,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-12-22 03:42:32,041 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 16 [2020-12-22 03:42:32,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:42:32,042 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-12-22 03:42:32,042 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 03:42:32,042 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-12-22 03:42:32,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-22 03:42:32,043 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:42:32,043 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:42:32,257 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:42:32,258 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:42:32,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:42:32,260 INFO L82 PathProgramCache]: Analyzing trace with hash -1461110436, now seen corresponding path program 1 times [2020-12-22 03:42:32,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:42:32,261 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488180170] [2020-12-22 03:42:32,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:42:32,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:42:32,315 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:32,315 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488180170] [2020-12-22 03:42:32,316 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2093513367] [2020-12-22 03:42:32,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:42:32,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:42:32,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-22 03:42:32,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:42:32,451 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:32,451 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:42:32,451 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-12-22 03:42:32,452 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884678333] [2020-12-22 03:42:32,452 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 03:42:32,452 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:42:32,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 03:42:32,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-22 03:42:32,454 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 6 states. [2020-12-22 03:42:32,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:42:32,479 INFO L93 Difference]: Finished difference Result 32 states and 34 transitions. [2020-12-22 03:42:32,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 03:42:32,479 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2020-12-22 03:42:32,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:42:32,480 INFO L225 Difference]: With dead ends: 32 [2020-12-22 03:42:32,480 INFO L226 Difference]: Without dead ends: 25 [2020-12-22 03:42:32,481 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-22 03:42:32,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-12-22 03:42:32,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22. [2020-12-22 03:42:32,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-12-22 03:42:32,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2020-12-22 03:42:32,486 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 16 [2020-12-22 03:42:32,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:42:32,486 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2020-12-22 03:42:32,487 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 03:42:32,487 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2020-12-22 03:42:32,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-22 03:42:32,488 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:42:32,488 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:42:32,701 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:42:32,702 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:42:32,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:42:32,703 INFO L82 PathProgramCache]: Analyzing trace with hash -295213789, now seen corresponding path program 2 times [2020-12-22 03:42:32,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:42:32,704 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825821878] [2020-12-22 03:42:32,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:42:32,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:42:32,769 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:32,769 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825821878] [2020-12-22 03:42:32,769 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2072080849] [2020-12-22 03:42:32,769 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 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 [2020-12-22 03:42:32,863 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 03:42:32,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:42:32,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-22 03:42:32,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:42:32,917 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:32,918 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:42:32,918 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-12-22 03:42:32,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44967101] [2020-12-22 03:42:32,919 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 03:42:32,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:42:32,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 03:42:32,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-22 03:42:32,920 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 7 states. [2020-12-22 03:42:32,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:42:32,945 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions. [2020-12-22 03:42:32,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 03:42:32,946 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 20 [2020-12-22 03:42:32,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:42:32,947 INFO L225 Difference]: With dead ends: 36 [2020-12-22 03:42:32,947 INFO L226 Difference]: Without dead ends: 29 [2020-12-22 03:42:32,948 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-22 03:42:32,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-12-22 03:42:32,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 26. [2020-12-22 03:42:32,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-12-22 03:42:32,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2020-12-22 03:42:32,952 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 20 [2020-12-22 03:42:32,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:42:32,953 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2020-12-22 03:42:32,953 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 03:42:32,953 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2020-12-22 03:42:32,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-12-22 03:42:32,954 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:42:32,954 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:42:33,169 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:42:33,170 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:42:33,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:42:33,171 INFO L82 PathProgramCache]: Analyzing trace with hash -1379117718, now seen corresponding path program 3 times [2020-12-22 03:42:33,172 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:42:33,173 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002151077] [2020-12-22 03:42:33,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:42:33,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:42:33,234 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:33,234 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002151077] [2020-12-22 03:42:33,235 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [652696079] [2020-12-22 03:42:33,235 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 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 [2020-12-22 03:42:33,327 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-12-22 03:42:33,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:42:33,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-22 03:42:33,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:42:33,372 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:33,373 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:42:33,373 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-12-22 03:42:33,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770095368] [2020-12-22 03:42:33,374 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 03:42:33,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:42:33,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 03:42:33,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-22 03:42:33,375 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand 8 states. [2020-12-22 03:42:33,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:42:33,405 INFO L93 Difference]: Finished difference Result 40 states and 42 transitions. [2020-12-22 03:42:33,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 03:42:33,406 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 24 [2020-12-22 03:42:33,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:42:33,410 INFO L225 Difference]: With dead ends: 40 [2020-12-22 03:42:33,410 INFO L226 Difference]: Without dead ends: 33 [2020-12-22 03:42:33,412 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-22 03:42:33,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-12-22 03:42:33,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 30. [2020-12-22 03:42:33,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-12-22 03:42:33,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2020-12-22 03:42:33,420 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 24 [2020-12-22 03:42:33,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:42:33,420 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2020-12-22 03:42:33,420 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 03:42:33,421 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2020-12-22 03:42:33,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-12-22 03:42:33,421 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:42:33,422 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:42:33,627 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-12-22 03:42:33,628 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:42:33,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:42:33,629 INFO L82 PathProgramCache]: Analyzing trace with hash 1428277809, now seen corresponding path program 4 times [2020-12-22 03:42:33,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:42:33,631 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318198347] [2020-12-22 03:42:33,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:42:33,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:42:33,793 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:33,794 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318198347] [2020-12-22 03:42:33,794 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [602974046] [2020-12-22 03:42:33,794 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 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 [2020-12-22 03:42:33,887 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 03:42:33,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:42:33,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-22 03:42:33,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:42:33,961 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:33,962 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:42:33,962 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-12-22 03:42:33,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781501831] [2020-12-22 03:42:33,963 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 03:42:33,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:42:33,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 03:42:33,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-22 03:42:33,965 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 9 states. [2020-12-22 03:42:34,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:42:34,018 INFO L93 Difference]: Finished difference Result 44 states and 46 transitions. [2020-12-22 03:42:34,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 03:42:34,018 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 28 [2020-12-22 03:42:34,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:42:34,023 INFO L225 Difference]: With dead ends: 44 [2020-12-22 03:42:34,023 INFO L226 Difference]: Without dead ends: 37 [2020-12-22 03:42:34,024 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-22 03:42:34,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-12-22 03:42:34,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 34. [2020-12-22 03:42:34,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-12-22 03:42:34,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2020-12-22 03:42:34,036 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 28 [2020-12-22 03:42:34,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:42:34,036 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2020-12-22 03:42:34,036 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 03:42:34,037 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2020-12-22 03:42:34,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-12-22 03:42:34,041 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:42:34,041 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:42:34,256 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:42:34,257 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:42:34,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:42:34,258 INFO L82 PathProgramCache]: Analyzing trace with hash -1215200392, now seen corresponding path program 5 times [2020-12-22 03:42:34,259 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:42:34,259 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390480374] [2020-12-22 03:42:34,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:42:34,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:42:34,351 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:34,351 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390480374] [2020-12-22 03:42:34,351 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1315798248] [2020-12-22 03:42:34,351 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 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 [2020-12-22 03:42:34,464 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-12-22 03:42:34,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:42:34,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-22 03:42:34,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:42:34,523 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:34,523 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:42:34,523 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-12-22 03:42:34,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77445099] [2020-12-22 03:42:34,524 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 03:42:34,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:42:34,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 03:42:34,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-22 03:42:34,525 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand 10 states. [2020-12-22 03:42:34,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:42:34,563 INFO L93 Difference]: Finished difference Result 48 states and 50 transitions. [2020-12-22 03:42:34,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 03:42:34,564 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 32 [2020-12-22 03:42:34,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:42:34,564 INFO L225 Difference]: With dead ends: 48 [2020-12-22 03:42:34,565 INFO L226 Difference]: Without dead ends: 41 [2020-12-22 03:42:34,565 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-22 03:42:34,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-12-22 03:42:34,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 38. [2020-12-22 03:42:34,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-12-22 03:42:34,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2020-12-22 03:42:34,570 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 32 [2020-12-22 03:42:34,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:42:34,570 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2020-12-22 03:42:34,571 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 03:42:34,571 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2020-12-22 03:42:34,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-12-22 03:42:34,572 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:42:34,572 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:42:34,785 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:42:34,786 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:42:34,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:42:34,787 INFO L82 PathProgramCache]: Analyzing trace with hash 2103787839, now seen corresponding path program 6 times [2020-12-22 03:42:34,787 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:42:34,788 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552080355] [2020-12-22 03:42:34,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:42:34,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:42:34,902 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:34,902 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552080355] [2020-12-22 03:42:34,902 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [135516925] [2020-12-22 03:42:34,903 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 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 [2020-12-22 03:42:35,047 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-12-22 03:42:35,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:42:35,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-22 03:42:35,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:42:35,112 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:35,113 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:42:35,113 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-12-22 03:42:35,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190455888] [2020-12-22 03:42:35,113 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-22 03:42:35,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:42:35,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-22 03:42:35,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-22 03:42:35,115 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand 11 states. [2020-12-22 03:42:35,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:42:35,158 INFO L93 Difference]: Finished difference Result 52 states and 54 transitions. [2020-12-22 03:42:35,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 03:42:35,158 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 36 [2020-12-22 03:42:35,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:42:35,159 INFO L225 Difference]: With dead ends: 52 [2020-12-22 03:42:35,159 INFO L226 Difference]: Without dead ends: 45 [2020-12-22 03:42:35,160 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-22 03:42:35,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-12-22 03:42:35,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 42. [2020-12-22 03:42:35,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-12-22 03:42:35,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2020-12-22 03:42:35,165 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 36 [2020-12-22 03:42:35,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:42:35,165 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2020-12-22 03:42:35,165 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-22 03:42:35,165 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2020-12-22 03:42:35,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-12-22 03:42:35,166 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:42:35,166 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:42:35,375 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-12-22 03:42:35,376 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:42:35,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:42:35,377 INFO L82 PathProgramCache]: Analyzing trace with hash -1811496058, now seen corresponding path program 7 times [2020-12-22 03:42:35,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:42:35,378 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622230497] [2020-12-22 03:42:35,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:42:35,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:42:35,501 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:35,502 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622230497] [2020-12-22 03:42:35,502 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638323562] [2020-12-22 03:42:35,502 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 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 [2020-12-22 03:42:35,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:42:35,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 358 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-22 03:42:35,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:42:35,718 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:35,719 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:42:35,719 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-12-22 03:42:35,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745912005] [2020-12-22 03:42:35,721 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-22 03:42:35,722 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:42:35,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-22 03:42:35,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-22 03:42:35,723 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 12 states. [2020-12-22 03:42:35,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:42:35,774 INFO L93 Difference]: Finished difference Result 56 states and 58 transitions. [2020-12-22 03:42:35,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-22 03:42:35,776 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 40 [2020-12-22 03:42:35,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:42:35,778 INFO L225 Difference]: With dead ends: 56 [2020-12-22 03:42:35,778 INFO L226 Difference]: Without dead ends: 49 [2020-12-22 03:42:35,778 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-22 03:42:35,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-12-22 03:42:35,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 46. [2020-12-22 03:42:35,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-12-22 03:42:35,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 47 transitions. [2020-12-22 03:42:35,784 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 47 transitions. Word has length 40 [2020-12-22 03:42:35,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:42:35,787 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 47 transitions. [2020-12-22 03:42:35,787 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-22 03:42:35,787 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 47 transitions. [2020-12-22 03:42:35,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-12-22 03:42:35,790 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:42:35,790 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:42:36,004 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:42:36,005 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:42:36,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:42:36,006 INFO L82 PathProgramCache]: Analyzing trace with hash -1644180915, now seen corresponding path program 8 times [2020-12-22 03:42:36,006 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:42:36,007 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027126952] [2020-12-22 03:42:36,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:42:36,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:42:36,180 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:36,180 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027126952] [2020-12-22 03:42:36,180 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671186909] [2020-12-22 03:42:36,181 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 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 [2020-12-22 03:42:36,319 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 03:42:36,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:42:36,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-22 03:42:36,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:42:36,392 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:36,393 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:42:36,393 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-12-22 03:42:36,393 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990300346] [2020-12-22 03:42:36,394 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-22 03:42:36,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:42:36,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-22 03:42:36,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-12-22 03:42:36,395 INFO L87 Difference]: Start difference. First operand 46 states and 47 transitions. Second operand 13 states. [2020-12-22 03:42:36,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:42:36,440 INFO L93 Difference]: Finished difference Result 60 states and 62 transitions. [2020-12-22 03:42:36,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-22 03:42:36,441 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 44 [2020-12-22 03:42:36,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:42:36,441 INFO L225 Difference]: With dead ends: 60 [2020-12-22 03:42:36,442 INFO L226 Difference]: Without dead ends: 53 [2020-12-22 03:42:36,442 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-12-22 03:42:36,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-12-22 03:42:36,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 50. [2020-12-22 03:42:36,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-12-22 03:42:36,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 51 transitions. [2020-12-22 03:42:36,447 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 51 transitions. Word has length 44 [2020-12-22 03:42:36,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:42:36,448 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 51 transitions. [2020-12-22 03:42:36,448 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-22 03:42:36,448 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 51 transitions. [2020-12-22 03:42:36,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-12-22 03:42:36,449 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:42:36,449 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:42:36,662 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:42:36,663 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:42:36,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:42:36,664 INFO L82 PathProgramCache]: Analyzing trace with hash 1660556692, now seen corresponding path program 9 times [2020-12-22 03:42:36,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:42:36,665 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079988119] [2020-12-22 03:42:36,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:42:36,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:42:36,799 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:36,799 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079988119] [2020-12-22 03:42:36,800 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [961402421] [2020-12-22 03:42:36,800 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 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 [2020-12-22 03:42:36,948 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2020-12-22 03:42:36,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:42:36,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 426 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-22 03:42:36,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:42:37,029 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:37,030 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:42:37,030 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-12-22 03:42:37,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200959063] [2020-12-22 03:42:37,042 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-22 03:42:37,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:42:37,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-22 03:42:37,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-12-22 03:42:37,044 INFO L87 Difference]: Start difference. First operand 50 states and 51 transitions. Second operand 14 states. [2020-12-22 03:42:37,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:42:37,097 INFO L93 Difference]: Finished difference Result 64 states and 66 transitions. [2020-12-22 03:42:37,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-22 03:42:37,098 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 48 [2020-12-22 03:42:37,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:42:37,098 INFO L225 Difference]: With dead ends: 64 [2020-12-22 03:42:37,099 INFO L226 Difference]: Without dead ends: 57 [2020-12-22 03:42:37,099 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-12-22 03:42:37,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-12-22 03:42:37,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 54. [2020-12-22 03:42:37,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-12-22 03:42:37,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2020-12-22 03:42:37,105 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 48 [2020-12-22 03:42:37,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:42:37,105 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2020-12-22 03:42:37,105 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-22 03:42:37,105 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2020-12-22 03:42:37,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-22 03:42:37,106 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:42:37,106 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:42:37,319 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-22 03:42:37,320 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:42:37,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:42:37,321 INFO L82 PathProgramCache]: Analyzing trace with hash 1069507931, now seen corresponding path program 10 times [2020-12-22 03:42:37,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:42:37,321 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923072467] [2020-12-22 03:42:37,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:42:37,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:42:37,472 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:37,472 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923072467] [2020-12-22 03:42:37,473 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676799489] [2020-12-22 03:42:37,473 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:42:37,603 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 03:42:37,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:42:37,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 460 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 03:42:37,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:42:37,698 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:37,699 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:42:37,699 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-12-22 03:42:37,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121905114] [2020-12-22 03:42:37,700 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-22 03:42:37,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:42:37,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-22 03:42:37,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-12-22 03:42:37,701 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand 15 states. [2020-12-22 03:42:37,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:42:37,770 INFO L93 Difference]: Finished difference Result 68 states and 70 transitions. [2020-12-22 03:42:37,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-22 03:42:37,771 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 52 [2020-12-22 03:42:37,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:42:37,772 INFO L225 Difference]: With dead ends: 68 [2020-12-22 03:42:37,772 INFO L226 Difference]: Without dead ends: 61 [2020-12-22 03:42:37,772 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-12-22 03:42:37,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-12-22 03:42:37,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 58. [2020-12-22 03:42:37,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-12-22 03:42:37,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 59 transitions. [2020-12-22 03:42:37,777 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 59 transitions. Word has length 52 [2020-12-22 03:42:37,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:42:37,778 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 59 transitions. [2020-12-22 03:42:37,778 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-22 03:42:37,778 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 59 transitions. [2020-12-22 03:42:37,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-12-22 03:42:37,779 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:42:37,779 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:42:37,992 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-22 03:42:37,993 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:42:37,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:42:37,993 INFO L82 PathProgramCache]: Analyzing trace with hash -1774618206, now seen corresponding path program 11 times [2020-12-22 03:42:37,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:42:37,994 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13709094] [2020-12-22 03:42:37,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:42:38,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:42:38,189 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:38,189 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13709094] [2020-12-22 03:42:38,190 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712738882] [2020-12-22 03:42:38,190 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 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 [2020-12-22 03:42:38,352 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2020-12-22 03:42:38,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:42:38,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 494 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-22 03:42:38,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:42:38,439 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:38,440 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:42:38,440 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-12-22 03:42:38,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647123416] [2020-12-22 03:42:38,442 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-22 03:42:38,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:42:38,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-22 03:42:38,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-12-22 03:42:38,444 INFO L87 Difference]: Start difference. First operand 58 states and 59 transitions. Second operand 16 states. [2020-12-22 03:42:38,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:42:38,520 INFO L93 Difference]: Finished difference Result 72 states and 74 transitions. [2020-12-22 03:42:38,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-22 03:42:38,521 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 56 [2020-12-22 03:42:38,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:42:38,522 INFO L225 Difference]: With dead ends: 72 [2020-12-22 03:42:38,522 INFO L226 Difference]: Without dead ends: 65 [2020-12-22 03:42:38,525 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-12-22 03:42:38,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-12-22 03:42:38,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 62. [2020-12-22 03:42:38,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-12-22 03:42:38,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 63 transitions. [2020-12-22 03:42:38,534 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 63 transitions. Word has length 56 [2020-12-22 03:42:38,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:42:38,534 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 63 transitions. [2020-12-22 03:42:38,534 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-22 03:42:38,534 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 63 transitions. [2020-12-22 03:42:38,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-12-22 03:42:38,535 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:42:38,535 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:42:38,748 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-12-22 03:42:38,748 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:42:38,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:42:38,749 INFO L82 PathProgramCache]: Analyzing trace with hash 1030885993, now seen corresponding path program 12 times [2020-12-22 03:42:38,750 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:42:38,750 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374218755] [2020-12-22 03:42:38,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:42:38,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:42:38,946 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:38,946 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374218755] [2020-12-22 03:42:38,947 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [39378766] [2020-12-22 03:42:38,947 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 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 [2020-12-22 03:42:39,127 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2020-12-22 03:42:39,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:42:39,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 528 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-22 03:42:39,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:42:39,223 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:39,223 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:42:39,223 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-12-22 03:42:39,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721181287] [2020-12-22 03:42:39,224 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 03:42:39,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:42:39,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 03:42:39,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-12-22 03:42:39,225 INFO L87 Difference]: Start difference. First operand 62 states and 63 transitions. Second operand 17 states. [2020-12-22 03:42:39,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:42:39,285 INFO L93 Difference]: Finished difference Result 76 states and 78 transitions. [2020-12-22 03:42:39,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-22 03:42:39,286 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 60 [2020-12-22 03:42:39,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:42:39,287 INFO L225 Difference]: With dead ends: 76 [2020-12-22 03:42:39,287 INFO L226 Difference]: Without dead ends: 69 [2020-12-22 03:42:39,287 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-12-22 03:42:39,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-12-22 03:42:39,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 66. [2020-12-22 03:42:39,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-12-22 03:42:39,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 67 transitions. [2020-12-22 03:42:39,292 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 67 transitions. Word has length 60 [2020-12-22 03:42:39,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:42:39,292 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 67 transitions. [2020-12-22 03:42:39,292 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 03:42:39,292 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 67 transitions. [2020-12-22 03:42:39,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 03:42:39,293 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:42:39,293 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:42:39,507 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:42:39,508 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:42:39,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:42:39,509 INFO L82 PathProgramCache]: Analyzing trace with hash -242028624, now seen corresponding path program 13 times [2020-12-22 03:42:39,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:42:39,509 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574317949] [2020-12-22 03:42:39,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:42:39,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:42:39,714 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:39,714 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574317949] [2020-12-22 03:42:39,714 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867084482] [2020-12-22 03:42:39,714 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 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 [2020-12-22 03:42:39,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:42:39,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 562 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-22 03:42:39,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:42:39,975 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:39,976 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:42:39,976 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-12-22 03:42:39,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201391726] [2020-12-22 03:42:39,978 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-22 03:42:39,978 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:42:39,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-22 03:42:39,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-12-22 03:42:39,979 INFO L87 Difference]: Start difference. First operand 66 states and 67 transitions. Second operand 18 states. [2020-12-22 03:42:40,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:42:40,070 INFO L93 Difference]: Finished difference Result 80 states and 82 transitions. [2020-12-22 03:42:40,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-22 03:42:40,071 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 64 [2020-12-22 03:42:40,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:42:40,072 INFO L225 Difference]: With dead ends: 80 [2020-12-22 03:42:40,072 INFO L226 Difference]: Without dead ends: 73 [2020-12-22 03:42:40,073 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-12-22 03:42:40,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-12-22 03:42:40,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 70. [2020-12-22 03:42:40,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-12-22 03:42:40,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 71 transitions. [2020-12-22 03:42:40,078 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 71 transitions. Word has length 64 [2020-12-22 03:42:40,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:42:40,078 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 71 transitions. [2020-12-22 03:42:40,078 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-22 03:42:40,078 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 71 transitions. [2020-12-22 03:42:40,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-12-22 03:42:40,079 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:42:40,079 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:42:40,293 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-22 03:42:40,294 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:42:40,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:42:40,295 INFO L82 PathProgramCache]: Analyzing trace with hash -1008348809, now seen corresponding path program 14 times [2020-12-22 03:42:40,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:42:40,295 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877677897] [2020-12-22 03:42:40,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:42:40,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:42:40,514 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:40,514 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877677897] [2020-12-22 03:42:40,514 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1622462367] [2020-12-22 03:42:40,515 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 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 [2020-12-22 03:42:40,678 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 03:42:40,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:42:40,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 596 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-22 03:42:40,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:42:40,778 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:40,779 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:42:40,779 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-12-22 03:42:40,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349536205] [2020-12-22 03:42:40,779 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-22 03:42:40,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:42:40,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-22 03:42:40,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-12-22 03:42:40,780 INFO L87 Difference]: Start difference. First operand 70 states and 71 transitions. Second operand 19 states. [2020-12-22 03:42:40,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:42:40,849 INFO L93 Difference]: Finished difference Result 84 states and 86 transitions. [2020-12-22 03:42:40,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-22 03:42:40,850 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 68 [2020-12-22 03:42:40,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:42:40,851 INFO L225 Difference]: With dead ends: 84 [2020-12-22 03:42:40,851 INFO L226 Difference]: Without dead ends: 77 [2020-12-22 03:42:40,851 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-12-22 03:42:40,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-12-22 03:42:40,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 74. [2020-12-22 03:42:40,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-12-22 03:42:40,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 75 transitions. [2020-12-22 03:42:40,856 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 75 transitions. Word has length 68 [2020-12-22 03:42:40,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:42:40,857 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 75 transitions. [2020-12-22 03:42:40,857 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-22 03:42:40,857 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 75 transitions. [2020-12-22 03:42:40,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-12-22 03:42:40,858 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:42:40,858 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:42:41,073 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-22 03:42:41,074 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:42:41,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:42:41,075 INFO L82 PathProgramCache]: Analyzing trace with hash -1965787202, now seen corresponding path program 15 times [2020-12-22 03:42:41,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:42:41,075 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92025036] [2020-12-22 03:42:41,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:42:41,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:42:41,356 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:41,356 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92025036] [2020-12-22 03:42:41,356 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2140636470] [2020-12-22 03:42:41,356 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:42:41,567 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2020-12-22 03:42:41,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:42:41,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 630 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-22 03:42:41,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:42:41,684 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:41,684 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:42:41,684 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-12-22 03:42:41,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844185557] [2020-12-22 03:42:41,685 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-22 03:42:41,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:42:41,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-22 03:42:41,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-12-22 03:42:41,686 INFO L87 Difference]: Start difference. First operand 74 states and 75 transitions. Second operand 20 states. [2020-12-22 03:42:41,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:42:41,761 INFO L93 Difference]: Finished difference Result 88 states and 90 transitions. [2020-12-22 03:42:41,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-22 03:42:41,761 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 72 [2020-12-22 03:42:41,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:42:41,762 INFO L225 Difference]: With dead ends: 88 [2020-12-22 03:42:41,763 INFO L226 Difference]: Without dead ends: 81 [2020-12-22 03:42:41,763 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-12-22 03:42:41,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-12-22 03:42:41,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 78. [2020-12-22 03:42:41,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-12-22 03:42:41,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 79 transitions. [2020-12-22 03:42:41,768 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 79 transitions. Word has length 72 [2020-12-22 03:42:41,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:42:41,768 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 79 transitions. [2020-12-22 03:42:41,768 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-22 03:42:41,769 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 79 transitions. [2020-12-22 03:42:41,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-12-22 03:42:41,769 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:42:41,770 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:42:41,984 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:42:41,985 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:42:41,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:42:41,986 INFO L82 PathProgramCache]: Analyzing trace with hash 1374200453, now seen corresponding path program 16 times [2020-12-22 03:42:41,986 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:42:41,986 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349680253] [2020-12-22 03:42:41,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:42:42,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:42:42,263 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:42,264 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349680253] [2020-12-22 03:42:42,264 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1551611759] [2020-12-22 03:42:42,264 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 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 [2020-12-22 03:42:42,415 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 03:42:42,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:42:42,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 664 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-22 03:42:42,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:42:42,517 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:42,517 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:42:42,517 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-12-22 03:42:42,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420441474] [2020-12-22 03:42:42,518 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-22 03:42:42,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:42:42,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-22 03:42:42,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-12-22 03:42:42,519 INFO L87 Difference]: Start difference. First operand 78 states and 79 transitions. Second operand 21 states. [2020-12-22 03:42:42,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:42:42,588 INFO L93 Difference]: Finished difference Result 92 states and 94 transitions. [2020-12-22 03:42:42,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-22 03:42:42,589 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 76 [2020-12-22 03:42:42,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:42:42,589 INFO L225 Difference]: With dead ends: 92 [2020-12-22 03:42:42,589 INFO L226 Difference]: Without dead ends: 85 [2020-12-22 03:42:42,590 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-12-22 03:42:42,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-12-22 03:42:42,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 82. [2020-12-22 03:42:42,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-12-22 03:42:42,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 83 transitions. [2020-12-22 03:42:42,595 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 83 transitions. Word has length 76 [2020-12-22 03:42:42,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:42:42,595 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 83 transitions. [2020-12-22 03:42:42,595 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-22 03:42:42,595 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 83 transitions. [2020-12-22 03:42:42,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-12-22 03:42:42,596 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:42:42,596 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:42:42,809 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:42:42,810 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:42:42,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:42:42,810 INFO L82 PathProgramCache]: Analyzing trace with hash -909372980, now seen corresponding path program 17 times [2020-12-22 03:42:42,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:42:42,811 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373410594] [2020-12-22 03:42:42,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:42:42,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:42:43,150 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:43,150 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373410594] [2020-12-22 03:42:43,150 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [298930923] [2020-12-22 03:42:43,151 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 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 [2020-12-22 03:42:43,368 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2020-12-22 03:42:43,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:42:43,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 698 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-22 03:42:43,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:42:43,480 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:43,480 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:42:43,480 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-12-22 03:42:43,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640770504] [2020-12-22 03:42:43,481 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-22 03:42:43,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:42:43,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-22 03:42:43,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-12-22 03:42:43,482 INFO L87 Difference]: Start difference. First operand 82 states and 83 transitions. Second operand 22 states. [2020-12-22 03:42:43,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:42:43,570 INFO L93 Difference]: Finished difference Result 96 states and 98 transitions. [2020-12-22 03:42:43,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-22 03:42:43,570 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 80 [2020-12-22 03:42:43,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:42:43,571 INFO L225 Difference]: With dead ends: 96 [2020-12-22 03:42:43,571 INFO L226 Difference]: Without dead ends: 89 [2020-12-22 03:42:43,572 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-12-22 03:42:43,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-12-22 03:42:43,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 86. [2020-12-22 03:42:43,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-12-22 03:42:43,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 87 transitions. [2020-12-22 03:42:43,579 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 87 transitions. Word has length 80 [2020-12-22 03:42:43,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:42:43,579 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 87 transitions. [2020-12-22 03:42:43,579 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-22 03:42:43,579 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 87 transitions. [2020-12-22 03:42:43,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-12-22 03:42:43,580 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:42:43,580 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:42:43,796 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:42:43,796 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:42:43,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:42:43,797 INFO L82 PathProgramCache]: Analyzing trace with hash -1203206765, now seen corresponding path program 18 times [2020-12-22 03:42:43,798 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:42:43,798 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843999196] [2020-12-22 03:42:43,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:42:43,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:42:44,150 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:44,151 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843999196] [2020-12-22 03:42:44,151 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1284589365] [2020-12-22 03:42:44,151 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-22 03:42:44,473 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) [2020-12-22 03:42:44,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:42:44,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 732 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-22 03:42:44,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:42:44,598 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:44,598 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:42:44,599 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-12-22 03:42:44,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057578313] [2020-12-22 03:42:44,599 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-22 03:42:44,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:42:44,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-22 03:42:44,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-12-22 03:42:44,601 INFO L87 Difference]: Start difference. First operand 86 states and 87 transitions. Second operand 23 states. [2020-12-22 03:42:44,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:42:44,682 INFO L93 Difference]: Finished difference Result 100 states and 102 transitions. [2020-12-22 03:42:44,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-22 03:42:44,683 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 84 [2020-12-22 03:42:44,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:42:44,684 INFO L225 Difference]: With dead ends: 100 [2020-12-22 03:42:44,684 INFO L226 Difference]: Without dead ends: 93 [2020-12-22 03:42:44,685 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-12-22 03:42:44,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-12-22 03:42:44,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 90. [2020-12-22 03:42:44,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-12-22 03:42:44,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 91 transitions. [2020-12-22 03:42:44,689 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 91 transitions. Word has length 84 [2020-12-22 03:42:44,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:42:44,690 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 91 transitions. [2020-12-22 03:42:44,690 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-22 03:42:44,690 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 91 transitions. [2020-12-22 03:42:44,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-12-22 03:42:44,691 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:42:44,691 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:42:44,904 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-12-22 03:42:44,904 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:42:44,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:42:44,905 INFO L82 PathProgramCache]: Analyzing trace with hash 1749532122, now seen corresponding path program 19 times [2020-12-22 03:42:44,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:42:44,905 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127708733] [2020-12-22 03:42:44,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:42:44,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:42:45,293 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:45,294 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127708733] [2020-12-22 03:42:45,294 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2012444364] [2020-12-22 03:42:45,294 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 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 [2020-12-22 03:42:45,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:42:45,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 766 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-22 03:42:45,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:42:45,603 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:45,603 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:42:45,603 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-12-22 03:42:45,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356168000] [2020-12-22 03:42:45,605 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-22 03:42:45,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:42:45,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-22 03:42:45,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2020-12-22 03:42:45,606 INFO L87 Difference]: Start difference. First operand 90 states and 91 transitions. Second operand 24 states. [2020-12-22 03:42:45,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:42:45,709 INFO L93 Difference]: Finished difference Result 104 states and 106 transitions. [2020-12-22 03:42:45,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-22 03:42:45,710 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 88 [2020-12-22 03:42:45,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:42:45,711 INFO L225 Difference]: With dead ends: 104 [2020-12-22 03:42:45,711 INFO L226 Difference]: Without dead ends: 97 [2020-12-22 03:42:45,712 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2020-12-22 03:42:45,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-12-22 03:42:45,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 94. [2020-12-22 03:42:45,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-12-22 03:42:45,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 95 transitions. [2020-12-22 03:42:45,716 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 95 transitions. Word has length 88 [2020-12-22 03:42:45,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:42:45,717 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 95 transitions. [2020-12-22 03:42:45,717 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-22 03:42:45,717 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 95 transitions. [2020-12-22 03:42:45,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-12-22 03:42:45,718 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:42:45,718 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:42:45,932 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-12-22 03:42:45,932 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:42:45,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:42:45,933 INFO L82 PathProgramCache]: Analyzing trace with hash 433289889, now seen corresponding path program 20 times [2020-12-22 03:42:45,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:42:45,933 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573335826] [2020-12-22 03:42:45,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:42:45,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:42:46,313 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:46,314 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573335826] [2020-12-22 03:42:46,314 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1398577894] [2020-12-22 03:42:46,314 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 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 [2020-12-22 03:42:46,507 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 03:42:46,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:42:46,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 800 conjuncts, 23 conjunts are in the unsatisfiable core [2020-12-22 03:42:46,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:42:46,635 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:46,635 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:42:46,635 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-12-22 03:42:46,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845023511] [2020-12-22 03:42:46,636 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-12-22 03:42:46,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:42:46,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-12-22 03:42:46,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2020-12-22 03:42:46,637 INFO L87 Difference]: Start difference. First operand 94 states and 95 transitions. Second operand 25 states. [2020-12-22 03:42:46,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:42:46,732 INFO L93 Difference]: Finished difference Result 108 states and 110 transitions. [2020-12-22 03:42:46,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-22 03:42:46,733 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 92 [2020-12-22 03:42:46,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:42:46,734 INFO L225 Difference]: With dead ends: 108 [2020-12-22 03:42:46,734 INFO L226 Difference]: Without dead ends: 101 [2020-12-22 03:42:46,734 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2020-12-22 03:42:46,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-12-22 03:42:46,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 98. [2020-12-22 03:42:46,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-12-22 03:42:46,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 99 transitions. [2020-12-22 03:42:46,739 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 99 transitions. Word has length 92 [2020-12-22 03:42:46,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:42:46,739 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 99 transitions. [2020-12-22 03:42:46,739 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-12-22 03:42:46,739 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 99 transitions. [2020-12-22 03:42:46,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-12-22 03:42:46,740 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:42:46,740 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:42:46,955 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:42:46,956 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:42:46,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:42:46,956 INFO L82 PathProgramCache]: Analyzing trace with hash 1914010600, now seen corresponding path program 21 times [2020-12-22 03:42:46,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:42:46,956 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203718859] [2020-12-22 03:42:46,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:42:46,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:42:47,395 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:47,396 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203718859] [2020-12-22 03:42:47,396 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1952511964] [2020-12-22 03:42:47,396 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-22 03:42:47,646 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 23 check-sat command(s) [2020-12-22 03:42:47,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:42:47,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 834 conjuncts, 24 conjunts are in the unsatisfiable core [2020-12-22 03:42:47,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:42:47,764 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:47,765 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:42:47,765 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-12-22 03:42:47,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575527132] [2020-12-22 03:42:47,765 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-12-22 03:42:47,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:42:47,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-12-22 03:42:47,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2020-12-22 03:42:47,767 INFO L87 Difference]: Start difference. First operand 98 states and 99 transitions. Second operand 26 states. [2020-12-22 03:42:47,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:42:47,845 INFO L93 Difference]: Finished difference Result 112 states and 114 transitions. [2020-12-22 03:42:47,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-22 03:42:47,846 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 96 [2020-12-22 03:42:47,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:42:47,847 INFO L225 Difference]: With dead ends: 112 [2020-12-22 03:42:47,847 INFO L226 Difference]: Without dead ends: 105 [2020-12-22 03:42:47,847 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2020-12-22 03:42:47,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-12-22 03:42:47,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 102. [2020-12-22 03:42:47,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-12-22 03:42:47,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 103 transitions. [2020-12-22 03:42:47,852 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 103 transitions. Word has length 96 [2020-12-22 03:42:47,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:42:47,852 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 103 transitions. [2020-12-22 03:42:47,852 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-12-22 03:42:47,852 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 103 transitions. [2020-12-22 03:42:47,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-12-22 03:42:47,853 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:42:47,853 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:42:48,066 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-12-22 03:42:48,067 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:42:48,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:42:48,067 INFO L82 PathProgramCache]: Analyzing trace with hash -346586705, now seen corresponding path program 22 times [2020-12-22 03:42:48,068 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:42:48,068 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480739299] [2020-12-22 03:42:48,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:42:48,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:42:48,521 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:48,521 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480739299] [2020-12-22 03:42:48,521 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528809416] [2020-12-22 03:42:48,522 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 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 [2020-12-22 03:42:48,736 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 03:42:48,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:42:48,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 868 conjuncts, 25 conjunts are in the unsatisfiable core [2020-12-22 03:42:48,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:42:48,892 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:48,894 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:42:48,894 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-12-22 03:42:48,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708125054] [2020-12-22 03:42:48,895 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-12-22 03:42:48,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:42:48,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-12-22 03:42:48,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2020-12-22 03:42:48,896 INFO L87 Difference]: Start difference. First operand 102 states and 103 transitions. Second operand 27 states. [2020-12-22 03:42:49,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:42:49,007 INFO L93 Difference]: Finished difference Result 116 states and 118 transitions. [2020-12-22 03:42:49,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-22 03:42:49,008 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 100 [2020-12-22 03:42:49,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:42:49,009 INFO L225 Difference]: With dead ends: 116 [2020-12-22 03:42:49,009 INFO L226 Difference]: Without dead ends: 109 [2020-12-22 03:42:49,009 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2020-12-22 03:42:49,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-12-22 03:42:49,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 106. [2020-12-22 03:42:49,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-12-22 03:42:49,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 107 transitions. [2020-12-22 03:42:49,015 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 107 transitions. Word has length 100 [2020-12-22 03:42:49,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:42:49,015 INFO L481 AbstractCegarLoop]: Abstraction has 106 states and 107 transitions. [2020-12-22 03:42:49,015 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-12-22 03:42:49,015 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 107 transitions. [2020-12-22 03:42:49,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-12-22 03:42:49,016 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:42:49,016 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:42:49,231 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:42:49,232 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:42:49,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:42:49,232 INFO L82 PathProgramCache]: Analyzing trace with hash 1157843958, now seen corresponding path program 23 times [2020-12-22 03:42:49,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:42:49,233 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580335884] [2020-12-22 03:42:49,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:42:49,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:42:49,713 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:49,713 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580335884] [2020-12-22 03:42:49,713 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [857784204] [2020-12-22 03:42:49,713 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 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 [2020-12-22 03:42:49,968 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2020-12-22 03:42:49,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:42:49,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 902 conjuncts, 26 conjunts are in the unsatisfiable core [2020-12-22 03:42:49,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:42:50,095 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:50,095 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:42:50,096 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-12-22 03:42:50,096 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972111568] [2020-12-22 03:42:50,096 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-12-22 03:42:50,096 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:42:50,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-12-22 03:42:50,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2020-12-22 03:42:50,097 INFO L87 Difference]: Start difference. First operand 106 states and 107 transitions. Second operand 28 states. [2020-12-22 03:42:50,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:42:50,209 INFO L93 Difference]: Finished difference Result 120 states and 122 transitions. [2020-12-22 03:42:50,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-12-22 03:42:50,209 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 104 [2020-12-22 03:42:50,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:42:50,210 INFO L225 Difference]: With dead ends: 120 [2020-12-22 03:42:50,210 INFO L226 Difference]: Without dead ends: 113 [2020-12-22 03:42:50,211 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2020-12-22 03:42:50,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-12-22 03:42:50,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 110. [2020-12-22 03:42:50,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-12-22 03:42:50,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 111 transitions. [2020-12-22 03:42:50,215 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 111 transitions. Word has length 104 [2020-12-22 03:42:50,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:42:50,216 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 111 transitions. [2020-12-22 03:42:50,216 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-12-22 03:42:50,216 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 111 transitions. [2020-12-22 03:42:50,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-12-22 03:42:50,217 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:42:50,217 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:42:50,431 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-12-22 03:42:50,431 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:42:50,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:42:50,432 INFO L82 PathProgramCache]: Analyzing trace with hash -207447363, now seen corresponding path program 24 times [2020-12-22 03:42:50,432 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:42:50,432 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122405531] [2020-12-22 03:42:50,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:42:50,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:42:50,971 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:50,971 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122405531] [2020-12-22 03:42:50,971 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1079994573] [2020-12-22 03:42:50,971 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 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 [2020-12-22 03:42:51,260 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 26 check-sat command(s) [2020-12-22 03:42:51,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:42:51,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 936 conjuncts, 27 conjunts are in the unsatisfiable core [2020-12-22 03:42:51,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:42:51,426 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:51,426 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:42:51,426 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2020-12-22 03:42:51,427 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255147722] [2020-12-22 03:42:51,427 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-12-22 03:42:51,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:42:51,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-12-22 03:42:51,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2020-12-22 03:42:51,428 INFO L87 Difference]: Start difference. First operand 110 states and 111 transitions. Second operand 29 states. [2020-12-22 03:42:51,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:42:51,520 INFO L93 Difference]: Finished difference Result 124 states and 126 transitions. [2020-12-22 03:42:51,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-22 03:42:51,521 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 108 [2020-12-22 03:42:51,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:42:51,522 INFO L225 Difference]: With dead ends: 124 [2020-12-22 03:42:51,522 INFO L226 Difference]: Without dead ends: 117 [2020-12-22 03:42:51,523 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2020-12-22 03:42:51,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-12-22 03:42:51,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 114. [2020-12-22 03:42:51,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-12-22 03:42:51,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 115 transitions. [2020-12-22 03:42:51,527 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 115 transitions. Word has length 108 [2020-12-22 03:42:51,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:42:51,527 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 115 transitions. [2020-12-22 03:42:51,527 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-12-22 03:42:51,527 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 115 transitions. [2020-12-22 03:42:51,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-12-22 03:42:51,528 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:42:51,528 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:42:51,741 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-12-22 03:42:51,742 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:42:51,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:42:51,743 INFO L82 PathProgramCache]: Analyzing trace with hash -1864421884, now seen corresponding path program 25 times [2020-12-22 03:42:51,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:42:51,743 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137642698] [2020-12-22 03:42:51,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:42:51,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:42:52,309 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:52,309 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137642698] [2020-12-22 03:42:52,310 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671608313] [2020-12-22 03:42:52,310 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 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 [2020-12-22 03:42:52,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:42:52,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 970 conjuncts, 28 conjunts are in the unsatisfiable core [2020-12-22 03:42:52,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:42:52,676 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:52,676 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:42:52,677 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2020-12-22 03:42:52,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160706474] [2020-12-22 03:42:52,677 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-12-22 03:42:52,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:42:52,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-12-22 03:42:52,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2020-12-22 03:42:52,678 INFO L87 Difference]: Start difference. First operand 114 states and 115 transitions. Second operand 30 states. [2020-12-22 03:42:52,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:42:52,799 INFO L93 Difference]: Finished difference Result 128 states and 130 transitions. [2020-12-22 03:42:52,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-12-22 03:42:52,799 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 112 [2020-12-22 03:42:52,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:42:52,801 INFO L225 Difference]: With dead ends: 128 [2020-12-22 03:42:52,801 INFO L226 Difference]: Without dead ends: 121 [2020-12-22 03:42:52,801 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2020-12-22 03:42:52,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-12-22 03:42:52,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 118. [2020-12-22 03:42:52,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-12-22 03:42:52,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 119 transitions. [2020-12-22 03:42:52,806 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 119 transitions. Word has length 112 [2020-12-22 03:42:52,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:42:52,806 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 119 transitions. [2020-12-22 03:42:52,806 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-12-22 03:42:52,807 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 119 transitions. [2020-12-22 03:42:52,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-12-22 03:42:52,807 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:42:52,816 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:42:53,029 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-12-22 03:42:53,030 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:42:53,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:42:53,031 INFO L82 PathProgramCache]: Analyzing trace with hash 1266861515, now seen corresponding path program 26 times [2020-12-22 03:42:53,031 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:42:53,031 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37075743] [2020-12-22 03:42:53,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:42:53,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:42:53,590 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:53,591 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37075743] [2020-12-22 03:42:53,591 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1093588144] [2020-12-22 03:42:53,591 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 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 [2020-12-22 03:42:53,816 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 03:42:53,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:42:53,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 1004 conjuncts, 29 conjunts are in the unsatisfiable core [2020-12-22 03:42:53,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:42:53,971 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:53,972 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:42:53,972 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2020-12-22 03:42:53,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574681063] [2020-12-22 03:42:53,973 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-12-22 03:42:53,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:42:53,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-12-22 03:42:53,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2020-12-22 03:42:53,974 INFO L87 Difference]: Start difference. First operand 118 states and 119 transitions. Second operand 31 states. [2020-12-22 03:42:54,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:42:54,106 INFO L93 Difference]: Finished difference Result 132 states and 134 transitions. [2020-12-22 03:42:54,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-12-22 03:42:54,106 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 116 [2020-12-22 03:42:54,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:42:54,107 INFO L225 Difference]: With dead ends: 132 [2020-12-22 03:42:54,107 INFO L226 Difference]: Without dead ends: 125 [2020-12-22 03:42:54,108 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2020-12-22 03:42:54,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-12-22 03:42:54,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 122. [2020-12-22 03:42:54,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-12-22 03:42:54,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 123 transitions. [2020-12-22 03:42:54,112 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 123 transitions. Word has length 116 [2020-12-22 03:42:54,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:42:54,113 INFO L481 AbstractCegarLoop]: Abstraction has 122 states and 123 transitions. [2020-12-22 03:42:54,113 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-12-22 03:42:54,113 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 123 transitions. [2020-12-22 03:42:54,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2020-12-22 03:42:54,113 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:42:54,114 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:42:54,328 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:42:54,329 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:42:54,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:42:54,329 INFO L82 PathProgramCache]: Analyzing trace with hash 1467425298, now seen corresponding path program 27 times [2020-12-22 03:42:54,330 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:42:54,330 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461873342] [2020-12-22 03:42:54,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:42:54,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:42:54,905 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:54,906 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461873342] [2020-12-22 03:42:54,906 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887615494] [2020-12-22 03:42:54,906 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 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 [2020-12-22 03:42:55,242 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 29 check-sat command(s) [2020-12-22 03:42:55,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:42:55,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 1038 conjuncts, 30 conjunts are in the unsatisfiable core [2020-12-22 03:42:55,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:42:55,435 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:55,435 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:42:55,435 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2020-12-22 03:42:55,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905324246] [2020-12-22 03:42:55,436 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-12-22 03:42:55,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:42:55,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-12-22 03:42:55,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2020-12-22 03:42:55,437 INFO L87 Difference]: Start difference. First operand 122 states and 123 transitions. Second operand 32 states. [2020-12-22 03:42:55,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:42:55,558 INFO L93 Difference]: Finished difference Result 136 states and 138 transitions. [2020-12-22 03:42:55,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-12-22 03:42:55,559 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 120 [2020-12-22 03:42:55,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:42:55,563 INFO L225 Difference]: With dead ends: 136 [2020-12-22 03:42:55,564 INFO L226 Difference]: Without dead ends: 129 [2020-12-22 03:42:55,564 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2020-12-22 03:42:55,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-12-22 03:42:55,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 126. [2020-12-22 03:42:55,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-12-22 03:42:55,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 127 transitions. [2020-12-22 03:42:55,574 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 127 transitions. Word has length 120 [2020-12-22 03:42:55,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:42:55,574 INFO L481 AbstractCegarLoop]: Abstraction has 126 states and 127 transitions. [2020-12-22 03:42:55,574 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-12-22 03:42:55,574 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 127 transitions. [2020-12-22 03:42:55,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-12-22 03:42:55,577 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:42:55,577 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:42:55,791 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2020-12-22 03:42:55,792 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:42:55,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:42:55,793 INFO L82 PathProgramCache]: Analyzing trace with hash 1573257945, now seen corresponding path program 28 times [2020-12-22 03:42:55,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:42:55,793 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764951632] [2020-12-22 03:42:55,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:42:55,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:42:56,519 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:56,519 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764951632] [2020-12-22 03:42:56,519 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141569917] [2020-12-22 03:42:56,519 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 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 [2020-12-22 03:42:56,782 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 03:42:56,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:42:56,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 1072 conjuncts, 31 conjunts are in the unsatisfiable core [2020-12-22 03:42:56,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:42:56,942 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:56,942 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:42:56,942 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2020-12-22 03:42:56,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401774704] [2020-12-22 03:42:56,943 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-12-22 03:42:56,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:42:56,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-12-22 03:42:56,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2020-12-22 03:42:56,944 INFO L87 Difference]: Start difference. First operand 126 states and 127 transitions. Second operand 33 states. [2020-12-22 03:42:57,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:42:57,098 INFO L93 Difference]: Finished difference Result 140 states and 142 transitions. [2020-12-22 03:42:57,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-12-22 03:42:57,098 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 124 [2020-12-22 03:42:57,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:42:57,099 INFO L225 Difference]: With dead ends: 140 [2020-12-22 03:42:57,099 INFO L226 Difference]: Without dead ends: 133 [2020-12-22 03:42:57,100 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2020-12-22 03:42:57,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-12-22 03:42:57,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 130. [2020-12-22 03:42:57,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-12-22 03:42:57,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 131 transitions. [2020-12-22 03:42:57,105 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 131 transitions. Word has length 124 [2020-12-22 03:42:57,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:42:57,105 INFO L481 AbstractCegarLoop]: Abstraction has 130 states and 131 transitions. [2020-12-22 03:42:57,105 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-12-22 03:42:57,105 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 131 transitions. [2020-12-22 03:42:57,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-12-22 03:42:57,106 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:42:57,106 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:42:57,319 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:42:57,320 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:42:57,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:42:57,320 INFO L82 PathProgramCache]: Analyzing trace with hash -325507040, now seen corresponding path program 29 times [2020-12-22 03:42:57,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:42:57,321 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118075334] [2020-12-22 03:42:57,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:42:57,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:42:58,028 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:58,029 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118075334] [2020-12-22 03:42:58,029 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1069155317] [2020-12-22 03:42:58,029 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-22 03:42:58,345 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2020-12-22 03:42:58,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:42:58,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 1106 conjuncts, 32 conjunts are in the unsatisfiable core [2020-12-22 03:42:58,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:42:58,551 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:58,552 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:42:58,552 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2020-12-22 03:42:58,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460289520] [2020-12-22 03:42:58,553 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-12-22 03:42:58,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:42:58,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-12-22 03:42:58,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2020-12-22 03:42:58,555 INFO L87 Difference]: Start difference. First operand 130 states and 131 transitions. Second operand 34 states. [2020-12-22 03:42:58,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:42:58,682 INFO L93 Difference]: Finished difference Result 144 states and 146 transitions. [2020-12-22 03:42:58,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-12-22 03:42:58,683 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 128 [2020-12-22 03:42:58,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:42:58,684 INFO L225 Difference]: With dead ends: 144 [2020-12-22 03:42:58,684 INFO L226 Difference]: Without dead ends: 137 [2020-12-22 03:42:58,685 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2020-12-22 03:42:58,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-12-22 03:42:58,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 134. [2020-12-22 03:42:58,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-12-22 03:42:58,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 135 transitions. [2020-12-22 03:42:58,691 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 135 transitions. Word has length 128 [2020-12-22 03:42:58,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:42:58,693 INFO L481 AbstractCegarLoop]: Abstraction has 134 states and 135 transitions. [2020-12-22 03:42:58,693 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-12-22 03:42:58,693 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 135 transitions. [2020-12-22 03:42:58,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2020-12-22 03:42:58,694 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:42:58,694 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:42:58,908 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2020-12-22 03:42:58,909 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:42:58,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:42:58,909 INFO L82 PathProgramCache]: Analyzing trace with hash -415608345, now seen corresponding path program 30 times [2020-12-22 03:42:58,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:42:58,910 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816235385] [2020-12-22 03:42:58,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:42:58,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:42:59,638 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:59,639 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816235385] [2020-12-22 03:42:59,639 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2072094801] [2020-12-22 03:42:59,639 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 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:42:59,999 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 32 check-sat command(s) [2020-12-22 03:42:59,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:43:00,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 1140 conjuncts, 33 conjunts are in the unsatisfiable core [2020-12-22 03:43:00,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:43:00,167 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:43:00,168 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:43:00,168 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2020-12-22 03:43:00,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478756831] [2020-12-22 03:43:00,169 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-12-22 03:43:00,169 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:43:00,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-12-22 03:43:00,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2020-12-22 03:43:00,170 INFO L87 Difference]: Start difference. First operand 134 states and 135 transitions. Second operand 35 states. [2020-12-22 03:43:00,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:43:00,313 INFO L93 Difference]: Finished difference Result 148 states and 150 transitions. [2020-12-22 03:43:00,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-12-22 03:43:00,313 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 132 [2020-12-22 03:43:00,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:43:00,315 INFO L225 Difference]: With dead ends: 148 [2020-12-22 03:43:00,315 INFO L226 Difference]: Without dead ends: 141 [2020-12-22 03:43:00,315 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2020-12-22 03:43:00,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-12-22 03:43:00,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 138. [2020-12-22 03:43:00,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-12-22 03:43:00,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 139 transitions. [2020-12-22 03:43:00,320 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 139 transitions. Word has length 132 [2020-12-22 03:43:00,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:43:00,321 INFO L481 AbstractCegarLoop]: Abstraction has 138 states and 139 transitions. [2020-12-22 03:43:00,321 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-12-22 03:43:00,321 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 139 transitions. [2020-12-22 03:43:00,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-12-22 03:43:00,322 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:43:00,322 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:43:00,535 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-12-22 03:43:00,536 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:43:00,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:43:00,536 INFO L82 PathProgramCache]: Analyzing trace with hash -166510546, now seen corresponding path program 31 times [2020-12-22 03:43:00,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:43:00,537 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112038610] [2020-12-22 03:43:00,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:43:00,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:43:01,354 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:43:01,355 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112038610] [2020-12-22 03:43:01,355 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843050347] [2020-12-22 03:43:01,355 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:43:01,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:43:01,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 1174 conjuncts, 34 conjunts are in the unsatisfiable core [2020-12-22 03:43:01,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:43:01,806 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:43:01,806 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:43:01,806 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2020-12-22 03:43:01,806 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483885937] [2020-12-22 03:43:01,807 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-12-22 03:43:01,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:43:01,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-12-22 03:43:01,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2020-12-22 03:43:01,808 INFO L87 Difference]: Start difference. First operand 138 states and 139 transitions. Second operand 36 states. [2020-12-22 03:43:01,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:43:01,942 INFO L93 Difference]: Finished difference Result 152 states and 154 transitions. [2020-12-22 03:43:01,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-12-22 03:43:01,943 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 136 [2020-12-22 03:43:01,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:43:01,944 INFO L225 Difference]: With dead ends: 152 [2020-12-22 03:43:01,945 INFO L226 Difference]: Without dead ends: 145 [2020-12-22 03:43:01,945 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2020-12-22 03:43:01,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-12-22 03:43:01,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 142. [2020-12-22 03:43:01,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-12-22 03:43:01,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 143 transitions. [2020-12-22 03:43:01,950 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 143 transitions. Word has length 136 [2020-12-22 03:43:01,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:43:01,951 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 143 transitions. [2020-12-22 03:43:01,951 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-12-22 03:43:01,951 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 143 transitions. [2020-12-22 03:43:01,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2020-12-22 03:43:01,952 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:43:01,952 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:43:02,165 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2020-12-22 03:43:02,166 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:43:02,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:43:02,167 INFO L82 PathProgramCache]: Analyzing trace with hash -156388619, now seen corresponding path program 32 times [2020-12-22 03:43:02,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:43:02,167 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253455072] [2020-12-22 03:43:02,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:43:02,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:43:03,005 INFO L134 CoverageAnalysis]: Checked inductivity of 2145 backedges. 0 proven. 2145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:43:03,005 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253455072] [2020-12-22 03:43:03,005 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2116888221] [2020-12-22 03:43:03,005 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:43:03,298 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 03:43:03,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:43:03,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 1208 conjuncts, 35 conjunts are in the unsatisfiable core [2020-12-22 03:43:03,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:43:03,475 INFO L134 CoverageAnalysis]: Checked inductivity of 2145 backedges. 0 proven. 2145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:43:03,475 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:43:03,475 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2020-12-22 03:43:03,476 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964606280] [2020-12-22 03:43:03,476 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-12-22 03:43:03,476 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:43:03,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-12-22 03:43:03,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2020-12-22 03:43:03,477 INFO L87 Difference]: Start difference. First operand 142 states and 143 transitions. Second operand 37 states. [2020-12-22 03:43:03,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:43:03,638 INFO L93 Difference]: Finished difference Result 156 states and 158 transitions. [2020-12-22 03:43:03,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-12-22 03:43:03,638 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 140 [2020-12-22 03:43:03,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:43:03,640 INFO L225 Difference]: With dead ends: 156 [2020-12-22 03:43:03,640 INFO L226 Difference]: Without dead ends: 149 [2020-12-22 03:43:03,641 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2020-12-22 03:43:03,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-12-22 03:43:03,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 146. [2020-12-22 03:43:03,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-12-22 03:43:03,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 147 transitions. [2020-12-22 03:43:03,645 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 147 transitions. Word has length 140 [2020-12-22 03:43:03,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:43:03,646 INFO L481 AbstractCegarLoop]: Abstraction has 146 states and 147 transitions. [2020-12-22 03:43:03,646 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-12-22 03:43:03,646 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 147 transitions. [2020-12-22 03:43:03,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2020-12-22 03:43:03,647 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:43:03,647 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:43:03,862 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-12-22 03:43:03,862 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:43:03,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:43:03,863 INFO L82 PathProgramCache]: Analyzing trace with hash 1806920252, now seen corresponding path program 33 times [2020-12-22 03:43:03,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:43:03,863 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345065806] [2020-12-22 03:43:03,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:43:03,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:43:04,765 INFO L134 CoverageAnalysis]: Checked inductivity of 2278 backedges. 0 proven. 2278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:43:04,765 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345065806] [2020-12-22 03:43:04,765 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593316765] [2020-12-22 03:43:04,765 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 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 [2020-12-22 03:43:05,135 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 35 check-sat command(s) [2020-12-22 03:43:05,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:43:05,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 1242 conjuncts, 36 conjunts are in the unsatisfiable core [2020-12-22 03:43:05,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:43:05,306 INFO L134 CoverageAnalysis]: Checked inductivity of 2278 backedges. 0 proven. 2278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:43:05,307 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:43:05,307 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2020-12-22 03:43:05,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428530396] [2020-12-22 03:43:05,307 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-12-22 03:43:05,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:43:05,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-12-22 03:43:05,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2020-12-22 03:43:05,309 INFO L87 Difference]: Start difference. First operand 146 states and 147 transitions. Second operand 38 states. [2020-12-22 03:43:05,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:43:05,453 INFO L93 Difference]: Finished difference Result 160 states and 162 transitions. [2020-12-22 03:43:05,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-12-22 03:43:05,454 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 144 [2020-12-22 03:43:05,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:43:05,455 INFO L225 Difference]: With dead ends: 160 [2020-12-22 03:43:05,455 INFO L226 Difference]: Without dead ends: 153 [2020-12-22 03:43:05,456 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2020-12-22 03:43:05,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-12-22 03:43:05,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 150. [2020-12-22 03:43:05,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-12-22 03:43:05,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 151 transitions. [2020-12-22 03:43:05,461 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 151 transitions. Word has length 144 [2020-12-22 03:43:05,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:43:05,461 INFO L481 AbstractCegarLoop]: Abstraction has 150 states and 151 transitions. [2020-12-22 03:43:05,461 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-12-22 03:43:05,461 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 151 transitions. [2020-12-22 03:43:05,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-12-22 03:43:05,462 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:43:05,462 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:43:05,675 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-12-22 03:43:05,676 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:43:05,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:43:05,676 INFO L82 PathProgramCache]: Analyzing trace with hash -319937021, now seen corresponding path program 34 times [2020-12-22 03:43:05,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:43:05,677 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265039594] [2020-12-22 03:43:05,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:43:05,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:43:06,635 INFO L134 CoverageAnalysis]: Checked inductivity of 2415 backedges. 0 proven. 2415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:43:06,635 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265039594] [2020-12-22 03:43:06,635 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817180864] [2020-12-22 03:43:06,635 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 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 [2020-12-22 03:43:06,947 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 03:43:06,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:43:06,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 1276 conjuncts, 37 conjunts are in the unsatisfiable core [2020-12-22 03:43:06,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:43:07,138 INFO L134 CoverageAnalysis]: Checked inductivity of 2415 backedges. 0 proven. 2415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:43:07,139 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:43:07,139 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2020-12-22 03:43:07,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620829853] [2020-12-22 03:43:07,139 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-12-22 03:43:07,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:43:07,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-12-22 03:43:07,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2020-12-22 03:43:07,141 INFO L87 Difference]: Start difference. First operand 150 states and 151 transitions. Second operand 39 states. [2020-12-22 03:43:07,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:43:07,319 INFO L93 Difference]: Finished difference Result 164 states and 166 transitions. [2020-12-22 03:43:07,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-12-22 03:43:07,319 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 148 [2020-12-22 03:43:07,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:43:07,321 INFO L225 Difference]: With dead ends: 164 [2020-12-22 03:43:07,321 INFO L226 Difference]: Without dead ends: 157 [2020-12-22 03:43:07,322 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2020-12-22 03:43:07,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2020-12-22 03:43:07,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 154. [2020-12-22 03:43:07,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-12-22 03:43:07,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 155 transitions. [2020-12-22 03:43:07,327 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 155 transitions. Word has length 148 [2020-12-22 03:43:07,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:43:07,328 INFO L481 AbstractCegarLoop]: Abstraction has 154 states and 155 transitions. [2020-12-22 03:43:07,328 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-12-22 03:43:07,328 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 155 transitions. [2020-12-22 03:43:07,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2020-12-22 03:43:07,329 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:43:07,329 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:43:07,542 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-12-22 03:43:07,542 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:43:07,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:43:07,543 INFO L82 PathProgramCache]: Analyzing trace with hash -1756912054, now seen corresponding path program 35 times [2020-12-22 03:43:07,543 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:43:07,544 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425943708] [2020-12-22 03:43:07,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:43:07,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:43:08,570 INFO L134 CoverageAnalysis]: Checked inductivity of 2556 backedges. 0 proven. 2556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:43:08,571 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425943708] [2020-12-22 03:43:08,571 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87470715] [2020-12-22 03:43:08,571 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 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 [2020-12-22 03:43:08,946 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 37 check-sat command(s) [2020-12-22 03:43:08,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:43:08,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 1310 conjuncts, 38 conjunts are in the unsatisfiable core [2020-12-22 03:43:08,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:43:09,133 INFO L134 CoverageAnalysis]: Checked inductivity of 2556 backedges. 0 proven. 2556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:43:09,133 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:43:09,133 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 40 [2020-12-22 03:43:09,133 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962748976] [2020-12-22 03:43:09,134 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-12-22 03:43:09,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:43:09,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-12-22 03:43:09,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2020-12-22 03:43:09,135 INFO L87 Difference]: Start difference. First operand 154 states and 155 transitions. Second operand 40 states. [2020-12-22 03:43:09,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:43:09,306 INFO L93 Difference]: Finished difference Result 168 states and 170 transitions. [2020-12-22 03:43:09,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-12-22 03:43:09,306 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 152 [2020-12-22 03:43:09,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:43:09,307 INFO L225 Difference]: With dead ends: 168 [2020-12-22 03:43:09,307 INFO L226 Difference]: Without dead ends: 161 [2020-12-22 03:43:09,308 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2020-12-22 03:43:09,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-12-22 03:43:09,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 158. [2020-12-22 03:43:09,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2020-12-22 03:43:09,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 159 transitions. [2020-12-22 03:43:09,312 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 159 transitions. Word has length 152 [2020-12-22 03:43:09,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:43:09,312 INFO L481 AbstractCegarLoop]: Abstraction has 158 states and 159 transitions. [2020-12-22 03:43:09,312 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-12-22 03:43:09,313 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 159 transitions. [2020-12-22 03:43:09,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2020-12-22 03:43:09,313 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:43:09,313 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 37, 37, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:43:09,514 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-12-22 03:43:09,514 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:43:09,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:43:09,515 INFO L82 PathProgramCache]: Analyzing trace with hash 2093591313, now seen corresponding path program 36 times [2020-12-22 03:43:09,515 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:43:09,515 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135426964] [2020-12-22 03:43:09,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:43:09,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:43:10,574 INFO L134 CoverageAnalysis]: Checked inductivity of 2701 backedges. 0 proven. 2701 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:43:10,574 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135426964] [2020-12-22 03:43:10,574 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [451555865] [2020-12-22 03:43:10,574 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 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 [2020-12-22 03:43:10,990 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 38 check-sat command(s) [2020-12-22 03:43:10,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:43:10,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 1344 conjuncts, 39 conjunts are in the unsatisfiable core [2020-12-22 03:43:10,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:43:11,217 INFO L134 CoverageAnalysis]: Checked inductivity of 2701 backedges. 0 proven. 2701 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:43:11,217 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:43:11,217 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 41 [2020-12-22 03:43:11,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749255865] [2020-12-22 03:43:11,218 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-12-22 03:43:11,218 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:43:11,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-12-22 03:43:11,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2020-12-22 03:43:11,220 INFO L87 Difference]: Start difference. First operand 158 states and 159 transitions. Second operand 41 states. [2020-12-22 03:43:11,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:43:11,418 INFO L93 Difference]: Finished difference Result 172 states and 174 transitions. [2020-12-22 03:43:11,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-12-22 03:43:11,418 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 156 [2020-12-22 03:43:11,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:43:11,420 INFO L225 Difference]: With dead ends: 172 [2020-12-22 03:43:11,420 INFO L226 Difference]: Without dead ends: 165 [2020-12-22 03:43:11,421 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2020-12-22 03:43:11,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-12-22 03:43:11,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 162. [2020-12-22 03:43:11,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-12-22 03:43:11,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 163 transitions. [2020-12-22 03:43:11,425 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 163 transitions. Word has length 156 [2020-12-22 03:43:11,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:43:11,426 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 163 transitions. [2020-12-22 03:43:11,426 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-12-22 03:43:11,426 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 163 transitions. [2020-12-22 03:43:11,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2020-12-22 03:43:11,427 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:43:11,427 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 38, 38, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:43:11,641 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-12-22 03:43:11,642 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:43:11,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:43:11,643 INFO L82 PathProgramCache]: Analyzing trace with hash 345896024, now seen corresponding path program 37 times [2020-12-22 03:43:11,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:43:11,643 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634399360] [2020-12-22 03:43:11,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:43:11,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:43:12,809 INFO L134 CoverageAnalysis]: Checked inductivity of 2850 backedges. 0 proven. 2850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:43:12,809 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634399360] [2020-12-22 03:43:12,809 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1468826098] [2020-12-22 03:43:12,809 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 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 [2020-12-22 03:43:13,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:43:13,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 1378 conjuncts, 40 conjunts are in the unsatisfiable core [2020-12-22 03:43:13,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:43:13,314 INFO L134 CoverageAnalysis]: Checked inductivity of 2850 backedges. 0 proven. 2850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:43:13,315 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:43:13,315 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 42 [2020-12-22 03:43:13,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844148344] [2020-12-22 03:43:13,315 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-12-22 03:43:13,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:43:13,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-12-22 03:43:13,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2020-12-22 03:43:13,317 INFO L87 Difference]: Start difference. First operand 162 states and 163 transitions. Second operand 42 states. [2020-12-22 03:43:13,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:43:13,496 INFO L93 Difference]: Finished difference Result 176 states and 178 transitions. [2020-12-22 03:43:13,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-12-22 03:43:13,497 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 160 [2020-12-22 03:43:13,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:43:13,498 INFO L225 Difference]: With dead ends: 176 [2020-12-22 03:43:13,498 INFO L226 Difference]: Without dead ends: 169 [2020-12-22 03:43:13,499 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2020-12-22 03:43:13,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2020-12-22 03:43:13,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 166. [2020-12-22 03:43:13,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-12-22 03:43:13,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 167 transitions. [2020-12-22 03:43:13,504 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 167 transitions. Word has length 160 [2020-12-22 03:43:13,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:43:13,505 INFO L481 AbstractCegarLoop]: Abstraction has 166 states and 167 transitions. [2020-12-22 03:43:13,505 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-12-22 03:43:13,505 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 167 transitions. [2020-12-22 03:43:13,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2020-12-22 03:43:13,506 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:43:13,506 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 39, 39, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:43:13,719 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:43:13,720 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:43:13,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:43:13,720 INFO L82 PathProgramCache]: Analyzing trace with hash -1425128929, now seen corresponding path program 38 times [2020-12-22 03:43:13,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:43:13,721 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568122979] [2020-12-22 03:43:13,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:43:13,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:43:14,916 INFO L134 CoverageAnalysis]: Checked inductivity of 3003 backedges. 0 proven. 3003 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:43:14,917 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568122979] [2020-12-22 03:43:14,917 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1805506864] [2020-12-22 03:43:14,917 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 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 [2020-12-22 03:43:15,260 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 03:43:15,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:43:15,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 1412 conjuncts, 41 conjunts are in the unsatisfiable core [2020-12-22 03:43:15,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:43:15,483 INFO L134 CoverageAnalysis]: Checked inductivity of 3003 backedges. 0 proven. 3003 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:43:15,483 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:43:15,483 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 43 [2020-12-22 03:43:15,483 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121868012] [2020-12-22 03:43:15,484 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-12-22 03:43:15,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:43:15,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-12-22 03:43:15,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2020-12-22 03:43:15,485 INFO L87 Difference]: Start difference. First operand 166 states and 167 transitions. Second operand 43 states. [2020-12-22 03:43:15,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:43:15,668 INFO L93 Difference]: Finished difference Result 180 states and 182 transitions. [2020-12-22 03:43:15,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-12-22 03:43:15,668 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 164 [2020-12-22 03:43:15,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:43:15,670 INFO L225 Difference]: With dead ends: 180 [2020-12-22 03:43:15,670 INFO L226 Difference]: Without dead ends: 173 [2020-12-22 03:43:15,671 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2020-12-22 03:43:15,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-12-22 03:43:15,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 170. [2020-12-22 03:43:15,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2020-12-22 03:43:15,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 171 transitions. [2020-12-22 03:43:15,676 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 171 transitions. Word has length 164 [2020-12-22 03:43:15,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:43:15,677 INFO L481 AbstractCegarLoop]: Abstraction has 170 states and 171 transitions. [2020-12-22 03:43:15,677 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-12-22 03:43:15,677 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 171 transitions. [2020-12-22 03:43:15,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2020-12-22 03:43:15,678 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:43:15,678 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 40, 40, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:43:15,887 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:43:15,888 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:43:15,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:43:15,888 INFO L82 PathProgramCache]: Analyzing trace with hash -779856794, now seen corresponding path program 39 times [2020-12-22 03:43:15,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:43:15,889 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131521477] [2020-12-22 03:43:15,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:43:15,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:43:17,036 INFO L134 CoverageAnalysis]: Checked inductivity of 3160 backedges. 0 proven. 3160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:43:17,037 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131521477] [2020-12-22 03:43:17,037 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [573103048] [2020-12-22 03:43:17,037 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 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 [2020-12-22 03:43:17,485 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 41 check-sat command(s) [2020-12-22 03:43:17,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:43:17,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 1446 conjuncts, 42 conjunts are in the unsatisfiable core [2020-12-22 03:43:17,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:43:17,694 INFO L134 CoverageAnalysis]: Checked inductivity of 3160 backedges. 0 proven. 3160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:43:17,694 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:43:17,695 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 44 [2020-12-22 03:43:17,695 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038198864] [2020-12-22 03:43:17,695 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-12-22 03:43:17,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:43:17,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-12-22 03:43:17,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2020-12-22 03:43:17,697 INFO L87 Difference]: Start difference. First operand 170 states and 171 transitions. Second operand 44 states. [2020-12-22 03:43:17,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:43:17,890 INFO L93 Difference]: Finished difference Result 184 states and 186 transitions. [2020-12-22 03:43:17,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-12-22 03:43:17,891 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 168 [2020-12-22 03:43:17,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:43:17,893 INFO L225 Difference]: With dead ends: 184 [2020-12-22 03:43:17,893 INFO L226 Difference]: Without dead ends: 177 [2020-12-22 03:43:17,898 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2020-12-22 03:43:17,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-12-22 03:43:17,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 174. [2020-12-22 03:43:17,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2020-12-22 03:43:17,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 175 transitions. [2020-12-22 03:43:17,913 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 175 transitions. Word has length 168 [2020-12-22 03:43:17,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:43:17,914 INFO L481 AbstractCegarLoop]: Abstraction has 174 states and 175 transitions. [2020-12-22 03:43:17,914 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-12-22 03:43:17,914 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 175 transitions. [2020-12-22 03:43:17,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2020-12-22 03:43:17,915 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:43:17,915 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 41, 41, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:43:18,131 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2020-12-22 03:43:18,132 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:43:18,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:43:18,133 INFO L82 PathProgramCache]: Analyzing trace with hash -829822163, now seen corresponding path program 40 times [2020-12-22 03:43:18,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:43:18,133 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590659391] [2020-12-22 03:43:18,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:43:18,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:43:19,382 INFO L134 CoverageAnalysis]: Checked inductivity of 3321 backedges. 0 proven. 3321 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:43:19,382 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590659391] [2020-12-22 03:43:19,382 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795618910] [2020-12-22 03:43:19,383 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 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 [2020-12-22 03:43:19,744 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 03:43:19,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:43:19,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 1480 conjuncts, 43 conjunts are in the unsatisfiable core [2020-12-22 03:43:19,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:43:19,968 INFO L134 CoverageAnalysis]: Checked inductivity of 3321 backedges. 0 proven. 3321 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:43:19,968 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:43:19,968 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 45 [2020-12-22 03:43:19,968 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671014201] [2020-12-22 03:43:19,969 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-12-22 03:43:19,969 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:43:19,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-12-22 03:43:19,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2020-12-22 03:43:19,970 INFO L87 Difference]: Start difference. First operand 174 states and 175 transitions. Second operand 45 states. [2020-12-22 03:43:20,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:43:20,196 INFO L93 Difference]: Finished difference Result 188 states and 190 transitions. [2020-12-22 03:43:20,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-12-22 03:43:20,197 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 172 [2020-12-22 03:43:20,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:43:20,198 INFO L225 Difference]: With dead ends: 188 [2020-12-22 03:43:20,198 INFO L226 Difference]: Without dead ends: 181 [2020-12-22 03:43:20,199 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2020-12-22 03:43:20,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2020-12-22 03:43:20,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 178. [2020-12-22 03:43:20,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2020-12-22 03:43:20,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 179 transitions. [2020-12-22 03:43:20,205 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 179 transitions. Word has length 172 [2020-12-22 03:43:20,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:43:20,205 INFO L481 AbstractCegarLoop]: Abstraction has 178 states and 179 transitions. [2020-12-22 03:43:20,205 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-12-22 03:43:20,205 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 179 transitions. [2020-12-22 03:43:20,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2020-12-22 03:43:20,206 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:43:20,206 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 42, 42, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:43:20,407 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:43:20,407 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:43:20,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:43:20,408 INFO L82 PathProgramCache]: Analyzing trace with hash 231261812, now seen corresponding path program 41 times [2020-12-22 03:43:20,408 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:43:20,408 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996903974] [2020-12-22 03:43:20,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:43:20,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:43:21,792 INFO L134 CoverageAnalysis]: Checked inductivity of 3486 backedges. 0 proven. 3486 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:43:21,792 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996903974] [2020-12-22 03:43:21,792 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [584039129] [2020-12-22 03:43:21,792 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 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 [2020-12-22 03:43:22,226 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 43 check-sat command(s) [2020-12-22 03:43:22,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:43:22,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 1514 conjuncts, 44 conjunts are in the unsatisfiable core [2020-12-22 03:43:22,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:43:22,452 INFO L134 CoverageAnalysis]: Checked inductivity of 3486 backedges. 0 proven. 3486 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:43:22,453 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:43:22,453 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 46 [2020-12-22 03:43:22,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457654573] [2020-12-22 03:43:22,454 INFO L461 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-12-22 03:43:22,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:43:22,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-12-22 03:43:22,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2020-12-22 03:43:22,455 INFO L87 Difference]: Start difference. First operand 178 states and 179 transitions. Second operand 46 states. [2020-12-22 03:43:22,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:43:22,662 INFO L93 Difference]: Finished difference Result 192 states and 194 transitions. [2020-12-22 03:43:22,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-12-22 03:43:22,662 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 176 [2020-12-22 03:43:22,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:43:22,663 INFO L225 Difference]: With dead ends: 192 [2020-12-22 03:43:22,663 INFO L226 Difference]: Without dead ends: 185 [2020-12-22 03:43:22,664 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2020-12-22 03:43:22,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2020-12-22 03:43:22,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 182. [2020-12-22 03:43:22,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2020-12-22 03:43:22,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 183 transitions. [2020-12-22 03:43:22,669 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 183 transitions. Word has length 176 [2020-12-22 03:43:22,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:43:22,669 INFO L481 AbstractCegarLoop]: Abstraction has 182 states and 183 transitions. [2020-12-22 03:43:22,669 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-12-22 03:43:22,669 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 183 transitions. [2020-12-22 03:43:22,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2020-12-22 03:43:22,670 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:43:22,670 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 43, 43, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:43:22,885 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:43:22,885 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:43:22,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:43:22,886 INFO L82 PathProgramCache]: Analyzing trace with hash -1878350277, now seen corresponding path program 42 times [2020-12-22 03:43:22,886 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:43:22,887 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314370686] [2020-12-22 03:43:22,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:43:22,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:43:24,289 INFO L134 CoverageAnalysis]: Checked inductivity of 3655 backedges. 0 proven. 3655 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:43:24,289 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314370686] [2020-12-22 03:43:24,289 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1726375334] [2020-12-22 03:43:24,289 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-22 03:43:24,757 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 44 check-sat command(s) [2020-12-22 03:43:24,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:43:24,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 1548 conjuncts, 45 conjunts are in the unsatisfiable core [2020-12-22 03:43:24,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:43:24,992 INFO L134 CoverageAnalysis]: Checked inductivity of 3655 backedges. 0 proven. 3655 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:43:24,992 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:43:24,993 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 47 [2020-12-22 03:43:24,993 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064866872] [2020-12-22 03:43:24,993 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-12-22 03:43:24,993 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:43:24,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-12-22 03:43:24,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2020-12-22 03:43:24,994 INFO L87 Difference]: Start difference. First operand 182 states and 183 transitions. Second operand 47 states. [2020-12-22 03:43:25,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:43:25,209 INFO L93 Difference]: Finished difference Result 196 states and 198 transitions. [2020-12-22 03:43:25,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-12-22 03:43:25,211 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 180 [2020-12-22 03:43:25,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:43:25,213 INFO L225 Difference]: With dead ends: 196 [2020-12-22 03:43:25,213 INFO L226 Difference]: Without dead ends: 189 [2020-12-22 03:43:25,214 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2020-12-22 03:43:25,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2020-12-22 03:43:25,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 186. [2020-12-22 03:43:25,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2020-12-22 03:43:25,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 187 transitions. [2020-12-22 03:43:25,220 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 187 transitions. Word has length 180 [2020-12-22 03:43:25,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:43:25,221 INFO L481 AbstractCegarLoop]: Abstraction has 186 states and 187 transitions. [2020-12-22 03:43:25,221 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-12-22 03:43:25,221 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 187 transitions. [2020-12-22 03:43:25,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2020-12-22 03:43:25,222 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:43:25,222 INFO L422 BasicCegarLoop]: trace histogram [44, 44, 44, 44, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:43:25,435 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2020-12-22 03:43:25,435 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:43:25,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:43:25,436 INFO L82 PathProgramCache]: Analyzing trace with hash 1530481282, now seen corresponding path program 43 times [2020-12-22 03:43:25,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:43:25,436 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725482835] [2020-12-22 03:43:25,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:43:25,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:43:26,877 INFO L134 CoverageAnalysis]: Checked inductivity of 3828 backedges. 0 proven. 3828 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:43:26,877 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725482835] [2020-12-22 03:43:26,878 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1618647830] [2020-12-22 03:43:26,878 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 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 [2020-12-22 03:43:27,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:43:27,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 1582 conjuncts, 46 conjunts are in the unsatisfiable core [2020-12-22 03:43:27,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:43:27,456 INFO L134 CoverageAnalysis]: Checked inductivity of 3828 backedges. 0 proven. 3828 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:43:27,456 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:43:27,456 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 48 [2020-12-22 03:43:27,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505994670] [2020-12-22 03:43:27,457 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-12-22 03:43:27,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:43:27,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-12-22 03:43:27,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2020-12-22 03:43:27,458 INFO L87 Difference]: Start difference. First operand 186 states and 187 transitions. Second operand 48 states. [2020-12-22 03:43:27,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:43:27,672 INFO L93 Difference]: Finished difference Result 200 states and 202 transitions. [2020-12-22 03:43:27,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-12-22 03:43:27,673 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 184 [2020-12-22 03:43:27,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:43:27,675 INFO L225 Difference]: With dead ends: 200 [2020-12-22 03:43:27,675 INFO L226 Difference]: Without dead ends: 193 [2020-12-22 03:43:27,676 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2020-12-22 03:43:27,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-12-22 03:43:27,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 190. [2020-12-22 03:43:27,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2020-12-22 03:43:27,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 191 transitions. [2020-12-22 03:43:27,681 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 191 transitions. Word has length 184 [2020-12-22 03:43:27,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:43:27,682 INFO L481 AbstractCegarLoop]: Abstraction has 190 states and 191 transitions. [2020-12-22 03:43:27,682 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-12-22 03:43:27,682 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 191 transitions. [2020-12-22 03:43:27,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2020-12-22 03:43:27,683 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:43:27,683 INFO L422 BasicCegarLoop]: trace histogram [45, 45, 45, 45, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:43:27,896 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2020-12-22 03:43:27,896 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:43:27,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:43:27,897 INFO L82 PathProgramCache]: Analyzing trace with hash -362908855, now seen corresponding path program 44 times [2020-12-22 03:43:27,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:43:27,898 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196232099] [2020-12-22 03:43:27,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:43:27,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:43:29,436 INFO L134 CoverageAnalysis]: Checked inductivity of 4005 backedges. 0 proven. 4005 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:43:29,437 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196232099] [2020-12-22 03:43:29,437 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1660742429] [2020-12-22 03:43:29,437 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 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 [2020-12-22 03:43:29,816 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 03:43:29,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:43:29,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 1616 conjuncts, 47 conjunts are in the unsatisfiable core [2020-12-22 03:43:29,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:43:30,080 INFO L134 CoverageAnalysis]: Checked inductivity of 4005 backedges. 0 proven. 4005 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:43:30,081 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:43:30,081 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 49 [2020-12-22 03:43:30,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514997357] [2020-12-22 03:43:30,081 INFO L461 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-12-22 03:43:30,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:43:30,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-12-22 03:43:30,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2020-12-22 03:43:30,083 INFO L87 Difference]: Start difference. First operand 190 states and 191 transitions. Second operand 49 states. [2020-12-22 03:43:30,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:43:30,331 INFO L93 Difference]: Finished difference Result 204 states and 206 transitions. [2020-12-22 03:43:30,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-12-22 03:43:30,332 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 188 [2020-12-22 03:43:30,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:43:30,333 INFO L225 Difference]: With dead ends: 204 [2020-12-22 03:43:30,333 INFO L226 Difference]: Without dead ends: 197 [2020-12-22 03:43:30,334 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 188 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2020-12-22 03:43:30,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2020-12-22 03:43:30,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 194. [2020-12-22 03:43:30,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2020-12-22 03:43:30,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 195 transitions. [2020-12-22 03:43:30,339 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 195 transitions. Word has length 188 [2020-12-22 03:43:30,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:43:30,340 INFO L481 AbstractCegarLoop]: Abstraction has 194 states and 195 transitions. [2020-12-22 03:43:30,340 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-12-22 03:43:30,340 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 195 transitions. [2020-12-22 03:43:30,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2020-12-22 03:43:30,341 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:43:30,341 INFO L422 BasicCegarLoop]: trace histogram [46, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:43:30,556 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2020-12-22 03:43:30,557 INFO L429 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:43:30,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:43:30,558 INFO L82 PathProgramCache]: Analyzing trace with hash -1650204528, now seen corresponding path program 45 times [2020-12-22 03:43:30,558 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:43:30,558 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985682525] [2020-12-22 03:43:30,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:43:30,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:43:32,071 INFO L134 CoverageAnalysis]: Checked inductivity of 4186 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:43:32,071 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985682525] [2020-12-22 03:43:32,071 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732002107] [2020-12-22 03:43:32,071 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 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 [2020-12-22 03:43:32,560 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 47 check-sat command(s) [2020-12-22 03:43:32,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:43:32,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 1650 conjuncts, 48 conjunts are in the unsatisfiable core [2020-12-22 03:43:32,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:43:32,809 INFO L134 CoverageAnalysis]: Checked inductivity of 4186 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:43:32,810 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:43:32,810 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 50 [2020-12-22 03:43:32,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241040207] [2020-12-22 03:43:32,810 INFO L461 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-12-22 03:43:32,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:43:32,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-12-22 03:43:32,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2020-12-22 03:43:32,811 INFO L87 Difference]: Start difference. First operand 194 states and 195 transitions. Second operand 50 states. [2020-12-22 03:43:33,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:43:33,068 INFO L93 Difference]: Finished difference Result 208 states and 210 transitions. [2020-12-22 03:43:33,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-12-22 03:43:33,069 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 192 [2020-12-22 03:43:33,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:43:33,070 INFO L225 Difference]: With dead ends: 208 [2020-12-22 03:43:33,070 INFO L226 Difference]: Without dead ends: 201 [2020-12-22 03:43:33,071 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2020-12-22 03:43:33,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2020-12-22 03:43:33,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 198. [2020-12-22 03:43:33,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2020-12-22 03:43:33,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 199 transitions. [2020-12-22 03:43:33,075 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 199 transitions. Word has length 192 [2020-12-22 03:43:33,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:43:33,076 INFO L481 AbstractCegarLoop]: Abstraction has 198 states and 199 transitions. [2020-12-22 03:43:33,076 INFO L482 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-12-22 03:43:33,076 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 199 transitions. [2020-12-22 03:43:33,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2020-12-22 03:43:33,077 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:43:33,077 INFO L422 BasicCegarLoop]: trace histogram [47, 47, 47, 47, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:43:33,292 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:43:33,293 INFO L429 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:43:33,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:43:33,293 INFO L82 PathProgramCache]: Analyzing trace with hash 710103639, now seen corresponding path program 46 times [2020-12-22 03:43:33,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:43:33,294 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735233795] [2020-12-22 03:43:33,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:43:33,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:43:34,995 INFO L134 CoverageAnalysis]: Checked inductivity of 4371 backedges. 0 proven. 4371 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:43:34,995 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735233795] [2020-12-22 03:43:34,995 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264291622] [2020-12-22 03:43:34,996 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 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 [2020-12-22 03:43:35,385 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 03:43:35,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:43:35,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 1684 conjuncts, 49 conjunts are in the unsatisfiable core [2020-12-22 03:43:35,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:43:35,662 INFO L134 CoverageAnalysis]: Checked inductivity of 4371 backedges. 0 proven. 4371 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:43:35,662 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:43:35,663 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 51 [2020-12-22 03:43:35,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280949569] [2020-12-22 03:43:35,663 INFO L461 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-12-22 03:43:35,663 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:43:35,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-12-22 03:43:35,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2020-12-22 03:43:35,665 INFO L87 Difference]: Start difference. First operand 198 states and 199 transitions. Second operand 51 states. [2020-12-22 03:43:35,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:43:35,940 INFO L93 Difference]: Finished difference Result 212 states and 214 transitions. [2020-12-22 03:43:35,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-12-22 03:43:35,941 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 196 [2020-12-22 03:43:35,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:43:35,942 INFO L225 Difference]: With dead ends: 212 [2020-12-22 03:43:35,943 INFO L226 Difference]: Without dead ends: 205 [2020-12-22 03:43:35,943 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2020-12-22 03:43:35,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2020-12-22 03:43:35,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 202. [2020-12-22 03:43:35,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 202 states. [2020-12-22 03:43:35,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 203 transitions. [2020-12-22 03:43:35,948 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 203 transitions. Word has length 196 [2020-12-22 03:43:35,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:43:35,949 INFO L481 AbstractCegarLoop]: Abstraction has 202 states and 203 transitions. [2020-12-22 03:43:35,949 INFO L482 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-12-22 03:43:35,949 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 203 transitions. [2020-12-22 03:43:35,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2020-12-22 03:43:35,950 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:43:35,950 INFO L422 BasicCegarLoop]: trace histogram [48, 48, 48, 48, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:43:36,163 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2020-12-22 03:43:36,164 INFO L429 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:43:36,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:43:36,164 INFO L82 PathProgramCache]: Analyzing trace with hash 181831838, now seen corresponding path program 47 times [2020-12-22 03:43:36,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:43:36,165 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281607872] [2020-12-22 03:43:36,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:43:36,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:43:37,950 INFO L134 CoverageAnalysis]: Checked inductivity of 4560 backedges. 0 proven. 4560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:43:37,950 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281607872] [2020-12-22 03:43:37,950 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2088594684] [2020-12-22 03:43:37,950 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 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 [2020-12-22 03:43:38,440 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 49 check-sat command(s) [2020-12-22 03:43:38,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:43:38,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 1718 conjuncts, 50 conjunts are in the unsatisfiable core [2020-12-22 03:43:38,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:43:38,682 INFO L134 CoverageAnalysis]: Checked inductivity of 4560 backedges. 0 proven. 4560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:43:38,682 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:43:38,683 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 52 [2020-12-22 03:43:38,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310672298] [2020-12-22 03:43:38,683 INFO L461 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-12-22 03:43:38,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:43:38,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-12-22 03:43:38,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2020-12-22 03:43:38,685 INFO L87 Difference]: Start difference. First operand 202 states and 203 transitions. Second operand 52 states. [2020-12-22 03:43:38,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:43:38,915 INFO L93 Difference]: Finished difference Result 216 states and 218 transitions. [2020-12-22 03:43:38,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-12-22 03:43:38,916 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 200 [2020-12-22 03:43:38,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:43:38,917 INFO L225 Difference]: With dead ends: 216 [2020-12-22 03:43:38,917 INFO L226 Difference]: Without dead ends: 209 [2020-12-22 03:43:38,918 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2020-12-22 03:43:38,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2020-12-22 03:43:38,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 206. [2020-12-22 03:43:38,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 206 states. [2020-12-22 03:43:38,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 207 transitions. [2020-12-22 03:43:38,923 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 207 transitions. Word has length 200 [2020-12-22 03:43:38,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:43:38,924 INFO L481 AbstractCegarLoop]: Abstraction has 206 states and 207 transitions. [2020-12-22 03:43:38,924 INFO L482 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-12-22 03:43:38,924 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 207 transitions. [2020-12-22 03:43:38,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2020-12-22 03:43:38,925 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:43:38,925 INFO L422 BasicCegarLoop]: trace histogram [49, 49, 49, 49, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:43:39,137 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:43:39,138 INFO L429 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:43:39,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:43:39,139 INFO L82 PathProgramCache]: Analyzing trace with hash -289979547, now seen corresponding path program 48 times [2020-12-22 03:43:39,139 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:43:39,139 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509485407] [2020-12-22 03:43:39,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:43:39,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:43:40,887 INFO L134 CoverageAnalysis]: Checked inductivity of 4753 backedges. 0 proven. 4753 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:43:40,887 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509485407] [2020-12-22 03:43:40,887 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [445640469] [2020-12-22 03:43:40,887 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 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 [2020-12-22 03:43:41,449 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 50 check-sat command(s) [2020-12-22 03:43:41,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:43:41,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 1752 conjuncts, 51 conjunts are in the unsatisfiable core [2020-12-22 03:43:41,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:43:41,692 INFO L134 CoverageAnalysis]: Checked inductivity of 4753 backedges. 0 proven. 4753 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:43:41,692 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:43:41,692 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 53 [2020-12-22 03:43:41,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325324388] [2020-12-22 03:43:41,693 INFO L461 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-12-22 03:43:41,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:43:41,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-12-22 03:43:41,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2020-12-22 03:43:41,694 INFO L87 Difference]: Start difference. First operand 206 states and 207 transitions. Second operand 53 states. [2020-12-22 03:43:41,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:43:41,937 INFO L93 Difference]: Finished difference Result 220 states and 222 transitions. [2020-12-22 03:43:41,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-12-22 03:43:41,937 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 204 [2020-12-22 03:43:41,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:43:41,938 INFO L225 Difference]: With dead ends: 220 [2020-12-22 03:43:41,938 INFO L226 Difference]: Without dead ends: 213 [2020-12-22 03:43:41,939 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 204 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2020-12-22 03:43:41,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2020-12-22 03:43:41,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 210. [2020-12-22 03:43:41,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 210 states. [2020-12-22 03:43:41,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 211 transitions. [2020-12-22 03:43:41,944 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 211 transitions. Word has length 204 [2020-12-22 03:43:41,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:43:41,945 INFO L481 AbstractCegarLoop]: Abstraction has 210 states and 211 transitions. [2020-12-22 03:43:41,945 INFO L482 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-12-22 03:43:41,945 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 211 transitions. [2020-12-22 03:43:41,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2020-12-22 03:43:41,946 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:43:41,946 INFO L422 BasicCegarLoop]: trace histogram [50, 50, 50, 50, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:43:42,161 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:43:42,162 INFO L429 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:43:42,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:43:42,162 INFO L82 PathProgramCache]: Analyzing trace with hash 715080364, now seen corresponding path program 49 times [2020-12-22 03:43:42,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:43:42,163 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787925139] [2020-12-22 03:43:42,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:43:42,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:43:44,063 INFO L134 CoverageAnalysis]: Checked inductivity of 4950 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:43:44,064 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787925139] [2020-12-22 03:43:44,064 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2001996137] [2020-12-22 03:43:44,064 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 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 [2020-12-22 03:43:44,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:43:44,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 1786 conjuncts, 52 conjunts are in the unsatisfiable core [2020-12-22 03:43:44,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:43:44,765 INFO L134 CoverageAnalysis]: Checked inductivity of 4950 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:43:44,765 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:43:44,765 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 54 [2020-12-22 03:43:44,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852006671] [2020-12-22 03:43:44,766 INFO L461 AbstractCegarLoop]: Interpolant automaton has 54 states [2020-12-22 03:43:44,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:43:44,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2020-12-22 03:43:44,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2020-12-22 03:43:44,767 INFO L87 Difference]: Start difference. First operand 210 states and 211 transitions. Second operand 54 states. [2020-12-22 03:43:45,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:43:45,049 INFO L93 Difference]: Finished difference Result 224 states and 226 transitions. [2020-12-22 03:43:45,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-12-22 03:43:45,050 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 208 [2020-12-22 03:43:45,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:43:45,052 INFO L225 Difference]: With dead ends: 224 [2020-12-22 03:43:45,052 INFO L226 Difference]: Without dead ends: 217 [2020-12-22 03:43:45,052 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 208 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2020-12-22 03:43:45,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2020-12-22 03:43:45,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 214. [2020-12-22 03:43:45,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2020-12-22 03:43:45,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 215 transitions. [2020-12-22 03:43:45,058 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 215 transitions. Word has length 208 [2020-12-22 03:43:45,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:43:45,058 INFO L481 AbstractCegarLoop]: Abstraction has 214 states and 215 transitions. [2020-12-22 03:43:45,058 INFO L482 AbstractCegarLoop]: Interpolant automaton has 54 states. [2020-12-22 03:43:45,059 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 215 transitions. [2020-12-22 03:43:45,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2020-12-22 03:43:45,060 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:43:45,060 INFO L422 BasicCegarLoop]: trace histogram [51, 51, 51, 51, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:43:45,274 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2020-12-22 03:43:45,275 INFO L429 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:43:45,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:43:45,275 INFO L82 PathProgramCache]: Analyzing trace with hash 676873843, now seen corresponding path program 50 times [2020-12-22 03:43:45,276 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:43:45,276 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479216497] [2020-12-22 03:43:45,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:43:45,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:43:47,241 INFO L134 CoverageAnalysis]: Checked inductivity of 5151 backedges. 0 proven. 5151 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:43:47,242 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479216497] [2020-12-22 03:43:47,242 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [43344543] [2020-12-22 03:43:47,242 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 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 [2020-12-22 03:43:47,663 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 03:43:47,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:43:47,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 1820 conjuncts, 53 conjunts are in the unsatisfiable core [2020-12-22 03:43:47,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:43:47,951 INFO L134 CoverageAnalysis]: Checked inductivity of 5151 backedges. 0 proven. 5151 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:43:47,952 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:43:47,952 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 55 [2020-12-22 03:43:47,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666678637] [2020-12-22 03:43:47,953 INFO L461 AbstractCegarLoop]: Interpolant automaton has 55 states [2020-12-22 03:43:47,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:43:47,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2020-12-22 03:43:47,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2020-12-22 03:43:47,954 INFO L87 Difference]: Start difference. First operand 214 states and 215 transitions. Second operand 55 states. [2020-12-22 03:43:48,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:43:48,190 INFO L93 Difference]: Finished difference Result 228 states and 230 transitions. [2020-12-22 03:43:48,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-12-22 03:43:48,191 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 212 [2020-12-22 03:43:48,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:43:48,193 INFO L225 Difference]: With dead ends: 228 [2020-12-22 03:43:48,193 INFO L226 Difference]: Without dead ends: 221 [2020-12-22 03:43:48,194 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 212 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2020-12-22 03:43:48,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2020-12-22 03:43:48,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 218. [2020-12-22 03:43:48,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 218 states. [2020-12-22 03:43:48,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 219 transitions. [2020-12-22 03:43:48,200 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 219 transitions. Word has length 212 [2020-12-22 03:43:48,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:43:48,201 INFO L481 AbstractCegarLoop]: Abstraction has 218 states and 219 transitions. [2020-12-22 03:43:48,201 INFO L482 AbstractCegarLoop]: Interpolant automaton has 55 states. [2020-12-22 03:43:48,201 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 219 transitions. [2020-12-22 03:43:48,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2020-12-22 03:43:48,202 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:43:48,203 INFO L422 BasicCegarLoop]: trace histogram [52, 52, 52, 52, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:43:48,412 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:43:48,412 INFO L429 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:43:48,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:43:48,413 INFO L82 PathProgramCache]: Analyzing trace with hash -691269958, now seen corresponding path program 51 times [2020-12-22 03:43:48,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:43:48,413 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382836510] [2020-12-22 03:43:48,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:43:48,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:43:50,485 INFO L134 CoverageAnalysis]: Checked inductivity of 5356 backedges. 0 proven. 5356 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:43:50,485 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382836510] [2020-12-22 03:43:50,486 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1819858952] [2020-12-22 03:43:50,486 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 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 [2020-12-22 03:43:51,085 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 53 check-sat command(s) [2020-12-22 03:43:51,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:43:51,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 1854 conjuncts, 54 conjunts are in the unsatisfiable core [2020-12-22 03:43:51,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:43:51,383 INFO L134 CoverageAnalysis]: Checked inductivity of 5356 backedges. 0 proven. 5356 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:43:51,384 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:43:51,384 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 56 [2020-12-22 03:43:51,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93141101] [2020-12-22 03:43:51,384 INFO L461 AbstractCegarLoop]: Interpolant automaton has 56 states [2020-12-22 03:43:51,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:43:51,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2020-12-22 03:43:51,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2020-12-22 03:43:51,386 INFO L87 Difference]: Start difference. First operand 218 states and 219 transitions. Second operand 56 states. [2020-12-22 03:43:51,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:43:51,641 INFO L93 Difference]: Finished difference Result 232 states and 234 transitions. [2020-12-22 03:43:51,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-12-22 03:43:51,641 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 216 [2020-12-22 03:43:51,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:43:51,642 INFO L225 Difference]: With dead ends: 232 [2020-12-22 03:43:51,643 INFO L226 Difference]: Without dead ends: 225 [2020-12-22 03:43:51,643 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 216 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2020-12-22 03:43:51,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2020-12-22 03:43:51,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 222. [2020-12-22 03:43:51,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 222 states. [2020-12-22 03:43:51,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 223 transitions. [2020-12-22 03:43:51,649 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 223 transitions. Word has length 216 [2020-12-22 03:43:51,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:43:51,649 INFO L481 AbstractCegarLoop]: Abstraction has 222 states and 223 transitions. [2020-12-22 03:43:51,649 INFO L482 AbstractCegarLoop]: Interpolant automaton has 56 states. [2020-12-22 03:43:51,649 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 223 transitions. [2020-12-22 03:43:51,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2020-12-22 03:43:51,651 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:43:51,651 INFO L422 BasicCegarLoop]: trace histogram [53, 53, 53, 53, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:43:51,864 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2020-12-22 03:43:51,865 INFO L429 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:43:51,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:43:51,865 INFO L82 PathProgramCache]: Analyzing trace with hash 436493185, now seen corresponding path program 52 times [2020-12-22 03:43:51,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:43:51,866 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892939412] [2020-12-22 03:43:51,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:43:51,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:43:54,010 INFO L134 CoverageAnalysis]: Checked inductivity of 5565 backedges. 0 proven. 5565 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:43:54,011 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892939412] [2020-12-22 03:43:54,012 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1277163891] [2020-12-22 03:43:54,012 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 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 [2020-12-22 03:43:54,463 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 03:43:54,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:43:54,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 1888 conjuncts, 55 conjunts are in the unsatisfiable core [2020-12-22 03:43:54,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:43:54,773 INFO L134 CoverageAnalysis]: Checked inductivity of 5565 backedges. 0 proven. 5565 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:43:54,774 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:43:54,774 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 57 [2020-12-22 03:43:54,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770196474] [2020-12-22 03:43:54,774 INFO L461 AbstractCegarLoop]: Interpolant automaton has 57 states [2020-12-22 03:43:54,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:43:54,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2020-12-22 03:43:54,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2020-12-22 03:43:54,776 INFO L87 Difference]: Start difference. First operand 222 states and 223 transitions. Second operand 57 states. [2020-12-22 03:43:55,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:43:55,077 INFO L93 Difference]: Finished difference Result 236 states and 238 transitions. [2020-12-22 03:43:55,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-12-22 03:43:55,078 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 220 [2020-12-22 03:43:55,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:43:55,079 INFO L225 Difference]: With dead ends: 236 [2020-12-22 03:43:55,079 INFO L226 Difference]: Without dead ends: 229 [2020-12-22 03:43:55,079 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 220 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2020-12-22 03:43:55,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2020-12-22 03:43:55,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 226. [2020-12-22 03:43:55,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 226 states. [2020-12-22 03:43:55,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 227 transitions. [2020-12-22 03:43:55,085 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 227 transitions. Word has length 220 [2020-12-22 03:43:55,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:43:55,085 INFO L481 AbstractCegarLoop]: Abstraction has 226 states and 227 transitions. [2020-12-22 03:43:55,085 INFO L482 AbstractCegarLoop]: Interpolant automaton has 57 states. [2020-12-22 03:43:55,085 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 227 transitions. [2020-12-22 03:43:55,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2020-12-22 03:43:55,086 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:43:55,087 INFO L422 BasicCegarLoop]: trace histogram [54, 54, 54, 54, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:43:55,300 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2020-12-22 03:43:55,301 INFO L429 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:43:55,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:43:55,301 INFO L82 PathProgramCache]: Analyzing trace with hash 992668872, now seen corresponding path program 53 times [2020-12-22 03:43:55,302 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:43:55,302 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443194391] [2020-12-22 03:43:55,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:43:55,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:43:57,482 INFO L134 CoverageAnalysis]: Checked inductivity of 5778 backedges. 0 proven. 5778 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:43:57,483 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443194391] [2020-12-22 03:43:57,483 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1228382589] [2020-12-22 03:43:57,483 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 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 [2020-12-22 03:43:58,065 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 55 check-sat command(s) [2020-12-22 03:43:58,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:43:58,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 1922 conjuncts, 56 conjunts are in the unsatisfiable core [2020-12-22 03:43:58,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:43:58,392 INFO L134 CoverageAnalysis]: Checked inductivity of 5778 backedges. 0 proven. 5778 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:43:58,393 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:43:58,393 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 58 [2020-12-22 03:43:58,393 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591696559] [2020-12-22 03:43:58,393 INFO L461 AbstractCegarLoop]: Interpolant automaton has 58 states [2020-12-22 03:43:58,393 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:43:58,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2020-12-22 03:43:58,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2020-12-22 03:43:58,394 INFO L87 Difference]: Start difference. First operand 226 states and 227 transitions. Second operand 58 states. [2020-12-22 03:43:58,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:43:58,699 INFO L93 Difference]: Finished difference Result 240 states and 242 transitions. [2020-12-22 03:43:58,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-12-22 03:43:58,699 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 224 [2020-12-22 03:43:58,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:43:58,700 INFO L225 Difference]: With dead ends: 240 [2020-12-22 03:43:58,700 INFO L226 Difference]: Without dead ends: 233 [2020-12-22 03:43:58,701 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 224 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2020-12-22 03:43:58,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-12-22 03:43:58,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 230. [2020-12-22 03:43:58,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 230 states. [2020-12-22 03:43:58,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 231 transitions. [2020-12-22 03:43:58,706 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 231 transitions. Word has length 224 [2020-12-22 03:43:58,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:43:58,706 INFO L481 AbstractCegarLoop]: Abstraction has 230 states and 231 transitions. [2020-12-22 03:43:58,706 INFO L482 AbstractCegarLoop]: Interpolant automaton has 58 states. [2020-12-22 03:43:58,706 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 231 transitions. [2020-12-22 03:43:58,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2020-12-22 03:43:58,707 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:43:58,708 INFO L422 BasicCegarLoop]: trace histogram [55, 55, 55, 55, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:43:58,908 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:43:58,908 INFO L429 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:43:58,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:43:58,909 INFO L82 PathProgramCache]: Analyzing trace with hash 1485406863, now seen corresponding path program 54 times [2020-12-22 03:43:58,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:43:58,910 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265551423] [2020-12-22 03:43:58,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:43:58,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:44:01,155 INFO L134 CoverageAnalysis]: Checked inductivity of 5995 backedges. 0 proven. 5995 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:44:01,155 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265551423] [2020-12-22 03:44:01,156 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1378261950] [2020-12-22 03:44:01,156 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 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 [2020-12-22 03:44:01,776 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 56 check-sat command(s) [2020-12-22 03:44:01,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:44:01,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 1956 conjuncts, 57 conjunts are in the unsatisfiable core [2020-12-22 03:44:01,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:44:02,134 INFO L134 CoverageAnalysis]: Checked inductivity of 5995 backedges. 0 proven. 5995 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:44:02,134 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:44:02,135 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 59 [2020-12-22 03:44:02,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075333890] [2020-12-22 03:44:02,135 INFO L461 AbstractCegarLoop]: Interpolant automaton has 59 states [2020-12-22 03:44:02,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:44:02,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2020-12-22 03:44:02,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2020-12-22 03:44:02,137 INFO L87 Difference]: Start difference. First operand 230 states and 231 transitions. Second operand 59 states. [2020-12-22 03:44:02,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:44:02,440 INFO L93 Difference]: Finished difference Result 244 states and 246 transitions. [2020-12-22 03:44:02,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2020-12-22 03:44:02,441 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 228 [2020-12-22 03:44:02,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:44:02,442 INFO L225 Difference]: With dead ends: 244 [2020-12-22 03:44:02,442 INFO L226 Difference]: Without dead ends: 237 [2020-12-22 03:44:02,443 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 228 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2020-12-22 03:44:02,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2020-12-22 03:44:02,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 234. [2020-12-22 03:44:02,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 234 states. [2020-12-22 03:44:02,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 235 transitions. [2020-12-22 03:44:02,447 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 235 transitions. Word has length 228 [2020-12-22 03:44:02,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:44:02,447 INFO L481 AbstractCegarLoop]: Abstraction has 234 states and 235 transitions. [2020-12-22 03:44:02,447 INFO L482 AbstractCegarLoop]: Interpolant automaton has 59 states. [2020-12-22 03:44:02,447 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 235 transitions. [2020-12-22 03:44:02,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2020-12-22 03:44:02,448 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:44:02,448 INFO L422 BasicCegarLoop]: trace histogram [56, 56, 56, 56, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:44:02,649 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2020-12-22 03:44:02,649 INFO L429 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:44:02,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:44:02,650 INFO L82 PathProgramCache]: Analyzing trace with hash -712385322, now seen corresponding path program 55 times [2020-12-22 03:44:02,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:44:02,650 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765957791] [2020-12-22 03:44:02,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:44:02,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:44:04,973 INFO L134 CoverageAnalysis]: Checked inductivity of 6216 backedges. 0 proven. 6216 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:44:04,973 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765957791] [2020-12-22 03:44:04,973 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105072964] [2020-12-22 03:44:04,973 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 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 [2020-12-22 03:44:05,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:44:05,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 1990 conjuncts, 58 conjunts are in the unsatisfiable core [2020-12-22 03:44:05,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:44:05,773 INFO L134 CoverageAnalysis]: Checked inductivity of 6216 backedges. 0 proven. 6216 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:44:05,773 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:44:05,773 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 60 [2020-12-22 03:44:05,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591022055] [2020-12-22 03:44:05,774 INFO L461 AbstractCegarLoop]: Interpolant automaton has 60 states [2020-12-22 03:44:05,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:44:05,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2020-12-22 03:44:05,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2020-12-22 03:44:05,775 INFO L87 Difference]: Start difference. First operand 234 states and 235 transitions. Second operand 60 states. [2020-12-22 03:44:06,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:44:06,105 INFO L93 Difference]: Finished difference Result 248 states and 250 transitions. [2020-12-22 03:44:06,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2020-12-22 03:44:06,106 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 232 [2020-12-22 03:44:06,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:44:06,107 INFO L225 Difference]: With dead ends: 248 [2020-12-22 03:44:06,107 INFO L226 Difference]: Without dead ends: 241 [2020-12-22 03:44:06,107 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 232 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2020-12-22 03:44:06,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2020-12-22 03:44:06,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 238. [2020-12-22 03:44:06,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 238 states. [2020-12-22 03:44:06,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 239 transitions. [2020-12-22 03:44:06,113 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 239 transitions. Word has length 232 [2020-12-22 03:44:06,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:44:06,113 INFO L481 AbstractCegarLoop]: Abstraction has 238 states and 239 transitions. [2020-12-22 03:44:06,113 INFO L482 AbstractCegarLoop]: Interpolant automaton has 60 states. [2020-12-22 03:44:06,113 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 239 transitions. [2020-12-22 03:44:06,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2020-12-22 03:44:06,114 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:44:06,115 INFO L422 BasicCegarLoop]: trace histogram [57, 57, 57, 57, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:44:06,329 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:44:06,330 INFO L429 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:44:06,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:44:06,330 INFO L82 PathProgramCache]: Analyzing trace with hash -894059619, now seen corresponding path program 56 times [2020-12-22 03:44:06,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:44:06,331 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497830704] [2020-12-22 03:44:06,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:44:06,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:44:08,798 INFO L134 CoverageAnalysis]: Checked inductivity of 6441 backedges. 0 proven. 6441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:44:08,799 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497830704] [2020-12-22 03:44:08,799 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983512149] [2020-12-22 03:44:08,799 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 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 [2020-12-22 03:44:09,287 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 03:44:09,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:44:09,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 2024 conjuncts, 59 conjunts are in the unsatisfiable core [2020-12-22 03:44:09,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:44:09,597 INFO L134 CoverageAnalysis]: Checked inductivity of 6441 backedges. 0 proven. 6441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:44:09,597 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:44:09,597 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 61 [2020-12-22 03:44:09,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280744292] [2020-12-22 03:44:09,598 INFO L461 AbstractCegarLoop]: Interpolant automaton has 61 states [2020-12-22 03:44:09,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:44:09,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2020-12-22 03:44:09,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2020-12-22 03:44:09,599 INFO L87 Difference]: Start difference. First operand 238 states and 239 transitions. Second operand 61 states. [2020-12-22 03:44:09,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:44:09,945 INFO L93 Difference]: Finished difference Result 252 states and 254 transitions. [2020-12-22 03:44:09,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2020-12-22 03:44:09,945 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 236 [2020-12-22 03:44:09,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:44:09,946 INFO L225 Difference]: With dead ends: 252 [2020-12-22 03:44:09,946 INFO L226 Difference]: Without dead ends: 245 [2020-12-22 03:44:09,947 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 295 GetRequests, 236 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2020-12-22 03:44:09,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2020-12-22 03:44:09,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 242. [2020-12-22 03:44:09,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 242 states. [2020-12-22 03:44:09,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 243 transitions. [2020-12-22 03:44:09,952 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 243 transitions. Word has length 236 [2020-12-22 03:44:09,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:44:09,953 INFO L481 AbstractCegarLoop]: Abstraction has 242 states and 243 transitions. [2020-12-22 03:44:09,953 INFO L482 AbstractCegarLoop]: Interpolant automaton has 61 states. [2020-12-22 03:44:09,953 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 243 transitions. [2020-12-22 03:44:09,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2020-12-22 03:44:09,954 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:44:09,954 INFO L422 BasicCegarLoop]: trace histogram [58, 58, 58, 58, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:44:10,168 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2020-12-22 03:44:10,169 INFO L429 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:44:10,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:44:10,170 INFO L82 PathProgramCache]: Analyzing trace with hash 1974918884, now seen corresponding path program 57 times [2020-12-22 03:44:10,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:44:10,170 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067863176] [2020-12-22 03:44:10,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:44:10,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:44:12,758 INFO L134 CoverageAnalysis]: Checked inductivity of 6670 backedges. 0 proven. 6670 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:44:12,758 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067863176] [2020-12-22 03:44:12,758 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1954486398] [2020-12-22 03:44:12,758 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 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 [2020-12-22 03:44:13,434 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 59 check-sat command(s) [2020-12-22 03:44:13,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:44:13,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 2058 conjuncts, 60 conjunts are in the unsatisfiable core [2020-12-22 03:44:13,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:44:13,768 INFO L134 CoverageAnalysis]: Checked inductivity of 6670 backedges. 0 proven. 6670 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:44:13,768 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:44:13,768 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 62 [2020-12-22 03:44:13,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74892702] [2020-12-22 03:44:13,769 INFO L461 AbstractCegarLoop]: Interpolant automaton has 62 states [2020-12-22 03:44:13,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:44:13,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2020-12-22 03:44:13,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2020-12-22 03:44:13,770 INFO L87 Difference]: Start difference. First operand 242 states and 243 transitions. Second operand 62 states. [2020-12-22 03:44:14,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:44:14,070 INFO L93 Difference]: Finished difference Result 256 states and 258 transitions. [2020-12-22 03:44:14,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2020-12-22 03:44:14,071 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 240 [2020-12-22 03:44:14,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:44:14,073 INFO L225 Difference]: With dead ends: 256 [2020-12-22 03:44:14,073 INFO L226 Difference]: Without dead ends: 249 [2020-12-22 03:44:14,073 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 300 GetRequests, 240 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2020-12-22 03:44:14,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2020-12-22 03:44:14,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 246. [2020-12-22 03:44:14,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 246 states. [2020-12-22 03:44:14,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 247 transitions. [2020-12-22 03:44:14,078 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 247 transitions. Word has length 240 [2020-12-22 03:44:14,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:44:14,079 INFO L481 AbstractCegarLoop]: Abstraction has 246 states and 247 transitions. [2020-12-22 03:44:14,079 INFO L482 AbstractCegarLoop]: Interpolant automaton has 62 states. [2020-12-22 03:44:14,079 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 247 transitions. [2020-12-22 03:44:14,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2020-12-22 03:44:14,080 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:44:14,081 INFO L422 BasicCegarLoop]: trace histogram [59, 59, 59, 59, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:44:14,294 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:44:14,294 INFO L429 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:44:14,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:44:14,295 INFO L82 PathProgramCache]: Analyzing trace with hash -1453914453, now seen corresponding path program 58 times [2020-12-22 03:44:14,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:44:14,295 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389329179] [2020-12-22 03:44:14,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:44:14,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:44:16,942 INFO L134 CoverageAnalysis]: Checked inductivity of 6903 backedges. 0 proven. 6903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:44:16,942 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389329179] [2020-12-22 03:44:16,942 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1816980181] [2020-12-22 03:44:16,942 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 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 [2020-12-22 03:44:17,425 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 03:44:17,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:44:17,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 2092 conjuncts, 61 conjunts are in the unsatisfiable core [2020-12-22 03:44:17,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:44:17,806 INFO L134 CoverageAnalysis]: Checked inductivity of 6903 backedges. 0 proven. 6903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:44:17,806 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:44:17,806 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 63 [2020-12-22 03:44:17,806 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254755870] [2020-12-22 03:44:17,807 INFO L461 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-12-22 03:44:17,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:44:17,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-12-22 03:44:17,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2020-12-22 03:44:17,808 INFO L87 Difference]: Start difference. First operand 246 states and 247 transitions. Second operand 63 states. [2020-12-22 03:44:18,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:44:18,114 INFO L93 Difference]: Finished difference Result 260 states and 262 transitions. [2020-12-22 03:44:18,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2020-12-22 03:44:18,115 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 244 [2020-12-22 03:44:18,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:44:18,116 INFO L225 Difference]: With dead ends: 260 [2020-12-22 03:44:18,116 INFO L226 Difference]: Without dead ends: 253 [2020-12-22 03:44:18,117 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 305 GetRequests, 244 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2020-12-22 03:44:18,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2020-12-22 03:44:18,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 250. [2020-12-22 03:44:18,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 250 states. [2020-12-22 03:44:18,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 251 transitions. [2020-12-22 03:44:18,122 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 251 transitions. Word has length 244 [2020-12-22 03:44:18,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:44:18,123 INFO L481 AbstractCegarLoop]: Abstraction has 250 states and 251 transitions. [2020-12-22 03:44:18,123 INFO L482 AbstractCegarLoop]: Interpolant automaton has 63 states. [2020-12-22 03:44:18,123 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 251 transitions. [2020-12-22 03:44:18,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2020-12-22 03:44:18,125 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:44:18,125 INFO L422 BasicCegarLoop]: trace histogram [60, 60, 60, 60, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:44:18,340 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2020-12-22 03:44:18,341 INFO L429 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:44:18,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:44:18,341 INFO L82 PathProgramCache]: Analyzing trace with hash 1031795442, now seen corresponding path program 59 times [2020-12-22 03:44:18,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:44:18,342 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378784254] [2020-12-22 03:44:18,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:44:18,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:44:21,078 INFO L134 CoverageAnalysis]: Checked inductivity of 7140 backedges. 0 proven. 7140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:44:21,078 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378784254] [2020-12-22 03:44:21,078 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1187678113] [2020-12-22 03:44:21,078 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 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 [2020-12-22 03:44:21,744 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 61 check-sat command(s) [2020-12-22 03:44:21,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:44:21,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 2126 conjuncts, 62 conjunts are in the unsatisfiable core [2020-12-22 03:44:21,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:44:22,058 INFO L134 CoverageAnalysis]: Checked inductivity of 7140 backedges. 0 proven. 7140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:44:22,059 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:44:22,059 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 64 [2020-12-22 03:44:22,059 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027722285] [2020-12-22 03:44:22,060 INFO L461 AbstractCegarLoop]: Interpolant automaton has 64 states [2020-12-22 03:44:22,060 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:44:22,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2020-12-22 03:44:22,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2020-12-22 03:44:22,061 INFO L87 Difference]: Start difference. First operand 250 states and 251 transitions. Second operand 64 states. [2020-12-22 03:44:22,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:44:22,388 INFO L93 Difference]: Finished difference Result 264 states and 266 transitions. [2020-12-22 03:44:22,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2020-12-22 03:44:22,388 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 248 [2020-12-22 03:44:22,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:44:22,390 INFO L225 Difference]: With dead ends: 264 [2020-12-22 03:44:22,390 INFO L226 Difference]: Without dead ends: 257 [2020-12-22 03:44:22,391 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 310 GetRequests, 248 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2020-12-22 03:44:22,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2020-12-22 03:44:22,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 254. [2020-12-22 03:44:22,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 254 states. [2020-12-22 03:44:22,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 255 transitions. [2020-12-22 03:44:22,397 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 255 transitions. Word has length 248 [2020-12-22 03:44:22,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:44:22,397 INFO L481 AbstractCegarLoop]: Abstraction has 254 states and 255 transitions. [2020-12-22 03:44:22,397 INFO L482 AbstractCegarLoop]: Interpolant automaton has 64 states. [2020-12-22 03:44:22,398 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 255 transitions. [2020-12-22 03:44:22,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2020-12-22 03:44:22,399 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:44:22,399 INFO L422 BasicCegarLoop]: trace histogram [61, 61, 61, 61, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:44:22,613 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:44:22,614 INFO L429 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:44:22,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:44:22,615 INFO L82 PathProgramCache]: Analyzing trace with hash 2134598585, now seen corresponding path program 60 times [2020-12-22 03:44:22,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:44:22,615 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288048131] [2020-12-22 03:44:22,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:44:22,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:44:25,418 INFO L134 CoverageAnalysis]: Checked inductivity of 7381 backedges. 0 proven. 7381 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:44:25,418 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288048131] [2020-12-22 03:44:25,418 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643294039] [2020-12-22 03:44:25,419 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 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 [2020-12-22 03:44:26,144 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 62 check-sat command(s) [2020-12-22 03:44:26,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:44:26,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 2160 conjuncts, 63 conjunts are in the unsatisfiable core [2020-12-22 03:44:26,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:44:26,474 INFO L134 CoverageAnalysis]: Checked inductivity of 7381 backedges. 0 proven. 7381 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:44:26,474 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:44:26,475 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 65 [2020-12-22 03:44:26,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760241402] [2020-12-22 03:44:26,475 INFO L461 AbstractCegarLoop]: Interpolant automaton has 65 states [2020-12-22 03:44:26,476 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:44:26,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2020-12-22 03:44:26,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2020-12-22 03:44:26,477 INFO L87 Difference]: Start difference. First operand 254 states and 255 transitions. Second operand 65 states. [2020-12-22 03:44:26,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:44:26,873 INFO L93 Difference]: Finished difference Result 268 states and 270 transitions. [2020-12-22 03:44:26,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2020-12-22 03:44:26,873 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 252 [2020-12-22 03:44:26,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:44:26,875 INFO L225 Difference]: With dead ends: 268 [2020-12-22 03:44:26,875 INFO L226 Difference]: Without dead ends: 261 [2020-12-22 03:44:26,876 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 252 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2020-12-22 03:44:26,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2020-12-22 03:44:26,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 258. [2020-12-22 03:44:26,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 258 states. [2020-12-22 03:44:26,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 259 transitions. [2020-12-22 03:44:26,881 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 259 transitions. Word has length 252 [2020-12-22 03:44:26,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:44:26,881 INFO L481 AbstractCegarLoop]: Abstraction has 258 states and 259 transitions. [2020-12-22 03:44:26,881 INFO L482 AbstractCegarLoop]: Interpolant automaton has 65 states. [2020-12-22 03:44:26,881 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 259 transitions. [2020-12-22 03:44:26,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2020-12-22 03:44:26,883 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:44:26,883 INFO L422 BasicCegarLoop]: trace histogram [62, 62, 62, 62, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:44:27,096 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2020-12-22 03:44:27,097 INFO L429 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:44:27,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:44:27,097 INFO L82 PathProgramCache]: Analyzing trace with hash -1598875392, now seen corresponding path program 61 times [2020-12-22 03:44:27,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:44:27,098 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037120660] [2020-12-22 03:44:27,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:44:27,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:44:30,035 INFO L134 CoverageAnalysis]: Checked inductivity of 7626 backedges. 0 proven. 7626 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:44:30,036 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037120660] [2020-12-22 03:44:30,036 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1810288726] [2020-12-22 03:44:30,036 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 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 [2020-12-22 03:44:30,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:44:30,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 2194 conjuncts, 64 conjunts are in the unsatisfiable core [2020-12-22 03:44:30,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:44:30,916 INFO L134 CoverageAnalysis]: Checked inductivity of 7626 backedges. 0 proven. 7626 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:44:30,916 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:44:30,916 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 66 [2020-12-22 03:44:30,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827470053] [2020-12-22 03:44:30,917 INFO L461 AbstractCegarLoop]: Interpolant automaton has 66 states [2020-12-22 03:44:30,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:44:30,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2020-12-22 03:44:30,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2020-12-22 03:44:30,918 INFO L87 Difference]: Start difference. First operand 258 states and 259 transitions. Second operand 66 states. [2020-12-22 03:44:31,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:44:31,224 INFO L93 Difference]: Finished difference Result 272 states and 274 transitions. [2020-12-22 03:44:31,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2020-12-22 03:44:31,224 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 256 [2020-12-22 03:44:31,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:44:31,226 INFO L225 Difference]: With dead ends: 272 [2020-12-22 03:44:31,226 INFO L226 Difference]: Without dead ends: 265 [2020-12-22 03:44:31,226 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 320 GetRequests, 256 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2020-12-22 03:44:31,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2020-12-22 03:44:31,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 262. [2020-12-22 03:44:31,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 262 states. [2020-12-22 03:44:31,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 263 transitions. [2020-12-22 03:44:31,232 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 263 transitions. Word has length 256 [2020-12-22 03:44:31,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:44:31,232 INFO L481 AbstractCegarLoop]: Abstraction has 262 states and 263 transitions. [2020-12-22 03:44:31,232 INFO L482 AbstractCegarLoop]: Interpolant automaton has 66 states. [2020-12-22 03:44:31,232 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 263 transitions. [2020-12-22 03:44:31,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 261 [2020-12-22 03:44:31,233 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:44:31,234 INFO L422 BasicCegarLoop]: trace histogram [63, 63, 63, 63, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:44:31,447 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:44:31,448 INFO L429 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:44:31,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:44:31,448 INFO L82 PathProgramCache]: Analyzing trace with hash 691065543, now seen corresponding path program 62 times [2020-12-22 03:44:31,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:44:31,449 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762598379] [2020-12-22 03:44:31,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:44:31,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:44:34,482 INFO L134 CoverageAnalysis]: Checked inductivity of 7875 backedges. 0 proven. 7875 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:44:34,482 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762598379] [2020-12-22 03:44:34,482 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2095100472] [2020-12-22 03:44:34,482 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 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 [2020-12-22 03:44:34,999 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 03:44:35,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:44:35,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 2228 conjuncts, 65 conjunts are in the unsatisfiable core [2020-12-22 03:44:35,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:44:35,374 INFO L134 CoverageAnalysis]: Checked inductivity of 7875 backedges. 0 proven. 7875 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:44:35,374 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:44:35,375 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 67 [2020-12-22 03:44:35,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344198021] [2020-12-22 03:44:35,375 INFO L461 AbstractCegarLoop]: Interpolant automaton has 67 states [2020-12-22 03:44:35,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:44:35,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2020-12-22 03:44:35,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2020-12-22 03:44:35,377 INFO L87 Difference]: Start difference. First operand 262 states and 263 transitions. Second operand 67 states. [2020-12-22 03:44:35,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:44:35,753 INFO L93 Difference]: Finished difference Result 276 states and 278 transitions. [2020-12-22 03:44:35,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2020-12-22 03:44:35,754 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 260 [2020-12-22 03:44:35,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:44:35,755 INFO L225 Difference]: With dead ends: 276 [2020-12-22 03:44:35,755 INFO L226 Difference]: Without dead ends: 269 [2020-12-22 03:44:35,756 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 260 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2020-12-22 03:44:35,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2020-12-22 03:44:35,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 266. [2020-12-22 03:44:35,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 266 states. [2020-12-22 03:44:35,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 267 transitions. [2020-12-22 03:44:35,761 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 267 transitions. Word has length 260 [2020-12-22 03:44:35,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:44:35,762 INFO L481 AbstractCegarLoop]: Abstraction has 266 states and 267 transitions. [2020-12-22 03:44:35,762 INFO L482 AbstractCegarLoop]: Interpolant automaton has 67 states. [2020-12-22 03:44:35,762 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 267 transitions. [2020-12-22 03:44:35,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 265 [2020-12-22 03:44:35,763 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:44:35,763 INFO L422 BasicCegarLoop]: trace histogram [64, 64, 64, 64, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:44:35,977 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2020-12-22 03:44:35,978 INFO L429 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:44:35,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:44:35,978 INFO L82 PathProgramCache]: Analyzing trace with hash 1696485646, now seen corresponding path program 63 times [2020-12-22 03:44:35,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:44:35,979 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757992407] [2020-12-22 03:44:35,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:44:36,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:44:39,122 INFO L134 CoverageAnalysis]: Checked inductivity of 8128 backedges. 0 proven. 8128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:44:39,122 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757992407] [2020-12-22 03:44:39,123 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735007495] [2020-12-22 03:44:39,123 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 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 [2020-12-22 03:44:39,841 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 65 check-sat command(s) [2020-12-22 03:44:39,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:44:39,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 2262 conjuncts, 66 conjunts are in the unsatisfiable core [2020-12-22 03:44:39,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:44:40,193 INFO L134 CoverageAnalysis]: Checked inductivity of 8128 backedges. 0 proven. 8128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:44:40,194 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:44:40,194 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 68 [2020-12-22 03:44:40,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047763867] [2020-12-22 03:44:40,195 INFO L461 AbstractCegarLoop]: Interpolant automaton has 68 states [2020-12-22 03:44:40,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:44:40,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2020-12-22 03:44:40,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2020-12-22 03:44:40,195 INFO L87 Difference]: Start difference. First operand 266 states and 267 transitions. Second operand 68 states. [2020-12-22 03:44:40,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:44:40,577 INFO L93 Difference]: Finished difference Result 280 states and 282 transitions. [2020-12-22 03:44:40,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2020-12-22 03:44:40,577 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 264 [2020-12-22 03:44:40,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:44:40,579 INFO L225 Difference]: With dead ends: 280 [2020-12-22 03:44:40,579 INFO L226 Difference]: Without dead ends: 273 [2020-12-22 03:44:40,579 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 264 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2020-12-22 03:44:40,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2020-12-22 03:44:40,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 270. [2020-12-22 03:44:40,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 270 states. [2020-12-22 03:44:40,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 271 transitions. [2020-12-22 03:44:40,584 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 271 transitions. Word has length 264 [2020-12-22 03:44:40,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:44:40,584 INFO L481 AbstractCegarLoop]: Abstraction has 270 states and 271 transitions. [2020-12-22 03:44:40,584 INFO L482 AbstractCegarLoop]: Interpolant automaton has 68 states. [2020-12-22 03:44:40,584 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 271 transitions. [2020-12-22 03:44:40,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 269 [2020-12-22 03:44:40,586 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:44:40,586 INFO L422 BasicCegarLoop]: trace histogram [65, 65, 65, 65, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:44:40,799 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2020-12-22 03:44:40,800 INFO L429 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:44:40,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:44:40,800 INFO L82 PathProgramCache]: Analyzing trace with hash -704293931, now seen corresponding path program 64 times [2020-12-22 03:44:40,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:44:40,801 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151138209] [2020-12-22 03:44:40,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:44:40,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:44:44,071 INFO L134 CoverageAnalysis]: Checked inductivity of 8385 backedges. 0 proven. 8385 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:44:44,072 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151138209] [2020-12-22 03:44:44,072 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546390563] [2020-12-22 03:44:44,072 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-22 03:44:44,630 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 03:44:44,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:44:44,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 2296 conjuncts, 67 conjunts are in the unsatisfiable core [2020-12-22 03:44:44,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:44:45,023 INFO L134 CoverageAnalysis]: Checked inductivity of 8385 backedges. 0 proven. 8385 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:44:45,023 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:44:45,024 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 69 [2020-12-22 03:44:45,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419711674] [2020-12-22 03:44:45,024 INFO L461 AbstractCegarLoop]: Interpolant automaton has 69 states [2020-12-22 03:44:45,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:44:45,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2020-12-22 03:44:45,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2020-12-22 03:44:45,026 INFO L87 Difference]: Start difference. First operand 270 states and 271 transitions. Second operand 69 states. [2020-12-22 03:44:45,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:44:45,407 INFO L93 Difference]: Finished difference Result 284 states and 286 transitions. [2020-12-22 03:44:45,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2020-12-22 03:44:45,408 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 268 [2020-12-22 03:44:45,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:44:45,409 INFO L225 Difference]: With dead ends: 284 [2020-12-22 03:44:45,410 INFO L226 Difference]: Without dead ends: 277 [2020-12-22 03:44:45,410 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 268 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2020-12-22 03:44:45,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2020-12-22 03:44:45,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 274. [2020-12-22 03:44:45,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 274 states. [2020-12-22 03:44:45,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 275 transitions. [2020-12-22 03:44:45,415 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 275 transitions. Word has length 268 [2020-12-22 03:44:45,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:44:45,416 INFO L481 AbstractCegarLoop]: Abstraction has 274 states and 275 transitions. [2020-12-22 03:44:45,416 INFO L482 AbstractCegarLoop]: Interpolant automaton has 69 states. [2020-12-22 03:44:45,416 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 275 transitions. [2020-12-22 03:44:45,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 273 [2020-12-22 03:44:45,417 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:44:45,418 INFO L422 BasicCegarLoop]: trace histogram [66, 66, 66, 66, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:44:45,632 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2020-12-22 03:44:45,633 INFO L429 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:44:45,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:44:45,633 INFO L82 PathProgramCache]: Analyzing trace with hash -1567646948, now seen corresponding path program 65 times [2020-12-22 03:44:45,634 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:44:45,634 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341743087] [2020-12-22 03:44:45,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:44:45,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:44:48,994 INFO L134 CoverageAnalysis]: Checked inductivity of 8646 backedges. 0 proven. 8646 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:44:48,995 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341743087] [2020-12-22 03:44:48,995 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [350204478] [2020-12-22 03:44:48,995 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 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 [2020-12-22 03:44:49,724 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 67 check-sat command(s) [2020-12-22 03:44:49,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:44:49,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 2330 conjuncts, 68 conjunts are in the unsatisfiable core [2020-12-22 03:44:49,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:44:50,125 INFO L134 CoverageAnalysis]: Checked inductivity of 8646 backedges. 0 proven. 8646 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:44:50,126 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:44:50,126 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 70 [2020-12-22 03:44:50,126 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741266129] [2020-12-22 03:44:50,127 INFO L461 AbstractCegarLoop]: Interpolant automaton has 70 states [2020-12-22 03:44:50,127 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:44:50,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2020-12-22 03:44:50,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2020-12-22 03:44:50,128 INFO L87 Difference]: Start difference. First operand 274 states and 275 transitions. Second operand 70 states. [2020-12-22 03:44:50,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:44:50,469 INFO L93 Difference]: Finished difference Result 288 states and 290 transitions. [2020-12-22 03:44:50,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2020-12-22 03:44:50,470 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 272 [2020-12-22 03:44:50,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:44:50,471 INFO L225 Difference]: With dead ends: 288 [2020-12-22 03:44:50,471 INFO L226 Difference]: Without dead ends: 281 [2020-12-22 03:44:50,472 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 340 GetRequests, 272 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2020-12-22 03:44:50,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2020-12-22 03:44:50,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 278. [2020-12-22 03:44:50,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 278 states. [2020-12-22 03:44:50,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 279 transitions. [2020-12-22 03:44:50,477 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 279 transitions. Word has length 272 [2020-12-22 03:44:50,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:44:50,477 INFO L481 AbstractCegarLoop]: Abstraction has 278 states and 279 transitions. [2020-12-22 03:44:50,477 INFO L482 AbstractCegarLoop]: Interpolant automaton has 70 states. [2020-12-22 03:44:50,477 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 279 transitions. [2020-12-22 03:44:50,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 277 [2020-12-22 03:44:50,479 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:44:50,479 INFO L422 BasicCegarLoop]: trace histogram [67, 67, 67, 67, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:44:50,693 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:44:50,694 INFO L429 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:44:50,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:44:50,694 INFO L82 PathProgramCache]: Analyzing trace with hash 109504227, now seen corresponding path program 66 times [2020-12-22 03:44:50,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:44:50,695 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318728858] [2020-12-22 03:44:50,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:44:50,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:44:54,210 INFO L134 CoverageAnalysis]: Checked inductivity of 8911 backedges. 0 proven. 8911 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:44:54,210 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318728858] [2020-12-22 03:44:54,211 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1652280300] [2020-12-22 03:44:54,211 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 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 [2020-12-22 03:44:54,988 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 68 check-sat command(s) [2020-12-22 03:44:54,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:44:54,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 2364 conjuncts, 69 conjunts are in the unsatisfiable core [2020-12-22 03:44:54,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:44:55,414 INFO L134 CoverageAnalysis]: Checked inductivity of 8911 backedges. 0 proven. 8911 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:44:55,415 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:44:55,415 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 71 [2020-12-22 03:44:55,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340883246] [2020-12-22 03:44:55,416 INFO L461 AbstractCegarLoop]: Interpolant automaton has 71 states [2020-12-22 03:44:55,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:44:55,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2020-12-22 03:44:55,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2020-12-22 03:44:55,417 INFO L87 Difference]: Start difference. First operand 278 states and 279 transitions. Second operand 71 states. [2020-12-22 03:44:55,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:44:55,934 INFO L93 Difference]: Finished difference Result 292 states and 294 transitions. [2020-12-22 03:44:55,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2020-12-22 03:44:55,935 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 276 [2020-12-22 03:44:55,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:44:55,936 INFO L225 Difference]: With dead ends: 292 [2020-12-22 03:44:55,936 INFO L226 Difference]: Without dead ends: 285 [2020-12-22 03:44:55,937 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 345 GetRequests, 276 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2020-12-22 03:44:55,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2020-12-22 03:44:55,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 282. [2020-12-22 03:44:55,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 282 states. [2020-12-22 03:44:55,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 283 transitions. [2020-12-22 03:44:55,942 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 283 transitions. Word has length 276 [2020-12-22 03:44:55,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:44:55,942 INFO L481 AbstractCegarLoop]: Abstraction has 282 states and 283 transitions. [2020-12-22 03:44:55,942 INFO L482 AbstractCegarLoop]: Interpolant automaton has 71 states. [2020-12-22 03:44:55,942 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 283 transitions. [2020-12-22 03:44:55,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 281 [2020-12-22 03:44:55,943 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:44:55,944 INFO L422 BasicCegarLoop]: trace histogram [68, 68, 68, 68, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:44:56,159 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2020-12-22 03:44:56,160 INFO L429 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:44:56,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:44:56,161 INFO L82 PathProgramCache]: Analyzing trace with hash -1026230486, now seen corresponding path program 67 times [2020-12-22 03:44:56,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:44:56,161 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752373634] [2020-12-22 03:44:56,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:44:56,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:44:59,725 INFO L134 CoverageAnalysis]: Checked inductivity of 9180 backedges. 0 proven. 9180 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:44:59,725 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752373634] [2020-12-22 03:44:59,725 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914876511] [2020-12-22 03:44:59,725 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 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 [2020-12-22 03:45:00,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:45:00,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 2398 conjuncts, 70 conjunts are in the unsatisfiable core [2020-12-22 03:45:00,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:45:00,678 INFO L134 CoverageAnalysis]: Checked inductivity of 9180 backedges. 0 proven. 9180 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:45:00,678 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:45:00,678 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 72 [2020-12-22 03:45:00,678 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865170723] [2020-12-22 03:45:00,679 INFO L461 AbstractCegarLoop]: Interpolant automaton has 72 states [2020-12-22 03:45:00,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:45:00,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2020-12-22 03:45:00,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2020-12-22 03:45:00,680 INFO L87 Difference]: Start difference. First operand 282 states and 283 transitions. Second operand 72 states. [2020-12-22 03:45:01,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:45:01,045 INFO L93 Difference]: Finished difference Result 296 states and 298 transitions. [2020-12-22 03:45:01,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2020-12-22 03:45:01,046 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 280 [2020-12-22 03:45:01,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:45:01,047 INFO L225 Difference]: With dead ends: 296 [2020-12-22 03:45:01,047 INFO L226 Difference]: Without dead ends: 289 [2020-12-22 03:45:01,048 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 350 GetRequests, 280 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2020-12-22 03:45:01,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2020-12-22 03:45:01,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 286. [2020-12-22 03:45:01,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 286 states. [2020-12-22 03:45:01,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 287 transitions. [2020-12-22 03:45:01,053 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 287 transitions. Word has length 280 [2020-12-22 03:45:01,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:45:01,053 INFO L481 AbstractCegarLoop]: Abstraction has 286 states and 287 transitions. [2020-12-22 03:45:01,053 INFO L482 AbstractCegarLoop]: Interpolant automaton has 72 states. [2020-12-22 03:45:01,053 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 287 transitions. [2020-12-22 03:45:01,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 285 [2020-12-22 03:45:01,054 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:45:01,055 INFO L422 BasicCegarLoop]: trace histogram [69, 69, 69, 69, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:45:01,268 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:45:01,269 INFO L429 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:45:01,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:45:01,270 INFO L82 PathProgramCache]: Analyzing trace with hash -1920758799, now seen corresponding path program 68 times [2020-12-22 03:45:01,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:45:01,270 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876447001] [2020-12-22 03:45:01,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:45:01,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:45:04,986 INFO L134 CoverageAnalysis]: Checked inductivity of 9453 backedges. 0 proven. 9453 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:45:04,987 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876447001] [2020-12-22 03:45:04,987 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1660994816] [2020-12-22 03:45:04,987 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 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 [2020-12-22 03:45:05,543 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 03:45:05,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:45:05,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 2432 conjuncts, 71 conjunts are in the unsatisfiable core [2020-12-22 03:45:05,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:45:05,997 INFO L134 CoverageAnalysis]: Checked inductivity of 9453 backedges. 0 proven. 9453 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:45:05,998 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:45:05,998 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 73 [2020-12-22 03:45:05,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019619488] [2020-12-22 03:45:05,999 INFO L461 AbstractCegarLoop]: Interpolant automaton has 73 states [2020-12-22 03:45:05,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:45:06,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2020-12-22 03:45:06,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2020-12-22 03:45:06,000 INFO L87 Difference]: Start difference. First operand 286 states and 287 transitions. Second operand 73 states. [2020-12-22 03:45:06,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:45:06,389 INFO L93 Difference]: Finished difference Result 300 states and 302 transitions. [2020-12-22 03:45:06,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2020-12-22 03:45:06,390 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 284 [2020-12-22 03:45:06,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:45:06,391 INFO L225 Difference]: With dead ends: 300 [2020-12-22 03:45:06,391 INFO L226 Difference]: Without dead ends: 293 [2020-12-22 03:45:06,391 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 355 GetRequests, 284 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2020-12-22 03:45:06,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2020-12-22 03:45:06,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 290. [2020-12-22 03:45:06,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 290 states. [2020-12-22 03:45:06,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 291 transitions. [2020-12-22 03:45:06,399 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 291 transitions. Word has length 284 [2020-12-22 03:45:06,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:45:06,399 INFO L481 AbstractCegarLoop]: Abstraction has 290 states and 291 transitions. [2020-12-22 03:45:06,399 INFO L482 AbstractCegarLoop]: Interpolant automaton has 73 states. [2020-12-22 03:45:06,399 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 291 transitions. [2020-12-22 03:45:06,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 289 [2020-12-22 03:45:06,401 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:45:06,402 INFO L422 BasicCegarLoop]: trace histogram [70, 70, 70, 70, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:45:06,616 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable71 [2020-12-22 03:45:06,616 INFO L429 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:45:06,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:45:06,617 INFO L82 PathProgramCache]: Analyzing trace with hash -2118359752, now seen corresponding path program 69 times [2020-12-22 03:45:06,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:45:06,617 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716379426] [2020-12-22 03:45:06,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:45:06,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:45:10,378 INFO L134 CoverageAnalysis]: Checked inductivity of 9730 backedges. 0 proven. 9730 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:45:10,379 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716379426] [2020-12-22 03:45:10,379 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524586736] [2020-12-22 03:45:10,379 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 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 [2020-12-22 03:45:11,249 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 71 check-sat command(s) [2020-12-22 03:45:11,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:45:11,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 2466 conjuncts, 72 conjunts are in the unsatisfiable core [2020-12-22 03:45:11,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:45:11,648 INFO L134 CoverageAnalysis]: Checked inductivity of 9730 backedges. 0 proven. 9730 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:45:11,648 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:45:11,648 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 74 [2020-12-22 03:45:11,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633822948] [2020-12-22 03:45:11,649 INFO L461 AbstractCegarLoop]: Interpolant automaton has 74 states [2020-12-22 03:45:11,649 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:45:11,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2020-12-22 03:45:11,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2020-12-22 03:45:11,650 INFO L87 Difference]: Start difference. First operand 290 states and 291 transitions. Second operand 74 states. [2020-12-22 03:45:12,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:45:12,007 INFO L93 Difference]: Finished difference Result 304 states and 306 transitions. [2020-12-22 03:45:12,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2020-12-22 03:45:12,008 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 288 [2020-12-22 03:45:12,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:45:12,009 INFO L225 Difference]: With dead ends: 304 [2020-12-22 03:45:12,010 INFO L226 Difference]: Without dead ends: 297 [2020-12-22 03:45:12,010 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 360 GetRequests, 288 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2020-12-22 03:45:12,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2020-12-22 03:45:12,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 294. [2020-12-22 03:45:12,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 294 states. [2020-12-22 03:45:12,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 295 transitions. [2020-12-22 03:45:12,014 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 295 transitions. Word has length 288 [2020-12-22 03:45:12,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:45:12,014 INFO L481 AbstractCegarLoop]: Abstraction has 294 states and 295 transitions. [2020-12-22 03:45:12,014 INFO L482 AbstractCegarLoop]: Interpolant automaton has 74 states. [2020-12-22 03:45:12,014 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 295 transitions. [2020-12-22 03:45:12,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 293 [2020-12-22 03:45:12,016 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:45:12,016 INFO L422 BasicCegarLoop]: trace histogram [71, 71, 71, 71, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:45:12,229 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:45:12,230 INFO L429 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:45:12,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:45:12,230 INFO L82 PathProgramCache]: Analyzing trace with hash -1882635521, now seen corresponding path program 70 times [2020-12-22 03:45:12,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:45:12,231 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994462885] [2020-12-22 03:45:12,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:45:12,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:45:16,130 INFO L134 CoverageAnalysis]: Checked inductivity of 10011 backedges. 0 proven. 10011 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:45:16,130 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994462885] [2020-12-22 03:45:16,130 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [631843069] [2020-12-22 03:45:16,130 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 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 [2020-12-22 03:45:16,715 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 03:45:16,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:45:16,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 2500 conjuncts, 73 conjunts are in the unsatisfiable core [2020-12-22 03:45:16,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:45:17,137 INFO L134 CoverageAnalysis]: Checked inductivity of 10011 backedges. 0 proven. 10011 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:45:17,137 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:45:17,137 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74] total 75 [2020-12-22 03:45:17,138 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395087152] [2020-12-22 03:45:17,138 INFO L461 AbstractCegarLoop]: Interpolant automaton has 75 states [2020-12-22 03:45:17,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:45:17,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2020-12-22 03:45:17,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2020-12-22 03:45:17,139 INFO L87 Difference]: Start difference. First operand 294 states and 295 transitions. Second operand 75 states. [2020-12-22 03:45:17,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:45:17,575 INFO L93 Difference]: Finished difference Result 308 states and 310 transitions. [2020-12-22 03:45:17,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2020-12-22 03:45:17,575 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 292 [2020-12-22 03:45:17,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:45:17,577 INFO L225 Difference]: With dead ends: 308 [2020-12-22 03:45:17,577 INFO L226 Difference]: Without dead ends: 301 [2020-12-22 03:45:17,577 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 365 GetRequests, 292 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2020-12-22 03:45:17,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2020-12-22 03:45:17,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 298. [2020-12-22 03:45:17,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 298 states. [2020-12-22 03:45:17,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 299 transitions. [2020-12-22 03:45:17,581 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 299 transitions. Word has length 292 [2020-12-22 03:45:17,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:45:17,581 INFO L481 AbstractCegarLoop]: Abstraction has 298 states and 299 transitions. [2020-12-22 03:45:17,581 INFO L482 AbstractCegarLoop]: Interpolant automaton has 75 states. [2020-12-22 03:45:17,582 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 299 transitions. [2020-12-22 03:45:17,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 297 [2020-12-22 03:45:17,583 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:45:17,583 INFO L422 BasicCegarLoop]: trace histogram [72, 72, 72, 72, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:45:17,792 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:45:17,793 INFO L429 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:45:17,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:45:17,793 INFO L82 PathProgramCache]: Analyzing trace with hash -317463226, now seen corresponding path program 71 times [2020-12-22 03:45:17,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:45:17,794 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721692626] [2020-12-22 03:45:17,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:45:17,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:45:21,825 INFO L134 CoverageAnalysis]: Checked inductivity of 10296 backedges. 0 proven. 10296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:45:21,826 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721692626] [2020-12-22 03:45:21,826 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1327766272] [2020-12-22 03:45:21,826 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 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 [2020-12-22 03:45:22,633 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 73 check-sat command(s) [2020-12-22 03:45:22,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:45:22,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 2534 conjuncts, 74 conjunts are in the unsatisfiable core [2020-12-22 03:45:22,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:45:23,056 INFO L134 CoverageAnalysis]: Checked inductivity of 10296 backedges. 0 proven. 10296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:45:23,057 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:45:23,057 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 76 [2020-12-22 03:45:23,057 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650672093] [2020-12-22 03:45:23,058 INFO L461 AbstractCegarLoop]: Interpolant automaton has 76 states [2020-12-22 03:45:23,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:45:23,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2020-12-22 03:45:23,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2020-12-22 03:45:23,059 INFO L87 Difference]: Start difference. First operand 298 states and 299 transitions. Second operand 76 states. [2020-12-22 03:45:23,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:45:23,497 INFO L93 Difference]: Finished difference Result 312 states and 314 transitions. [2020-12-22 03:45:23,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2020-12-22 03:45:23,498 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 296 [2020-12-22 03:45:23,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:45:23,499 INFO L225 Difference]: With dead ends: 312 [2020-12-22 03:45:23,499 INFO L226 Difference]: Without dead ends: 305 [2020-12-22 03:45:23,500 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 370 GetRequests, 296 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2020-12-22 03:45:23,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2020-12-22 03:45:23,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 302. [2020-12-22 03:45:23,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 302 states. [2020-12-22 03:45:23,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 303 transitions. [2020-12-22 03:45:23,504 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 303 transitions. Word has length 296 [2020-12-22 03:45:23,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:45:23,505 INFO L481 AbstractCegarLoop]: Abstraction has 302 states and 303 transitions. [2020-12-22 03:45:23,505 INFO L482 AbstractCegarLoop]: Interpolant automaton has 76 states. [2020-12-22 03:45:23,505 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 303 transitions. [2020-12-22 03:45:23,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 301 [2020-12-22 03:45:23,506 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:45:23,506 INFO L422 BasicCegarLoop]: trace histogram [73, 73, 73, 73, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:45:23,716 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:45:23,717 INFO L429 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:45:23,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:45:23,718 INFO L82 PathProgramCache]: Analyzing trace with hash -2077881331, now seen corresponding path program 72 times [2020-12-22 03:45:23,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:45:23,718 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974743991] [2020-12-22 03:45:23,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:45:23,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:45:27,871 INFO L134 CoverageAnalysis]: Checked inductivity of 10585 backedges. 0 proven. 10585 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:45:27,871 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974743991] [2020-12-22 03:45:27,871 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1073360539] [2020-12-22 03:45:27,871 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 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 [2020-12-22 03:45:28,747 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 74 check-sat command(s) [2020-12-22 03:45:28,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:45:28,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 2568 conjuncts, 75 conjunts are in the unsatisfiable core [2020-12-22 03:45:28,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:45:29,167 INFO L134 CoverageAnalysis]: Checked inductivity of 10585 backedges. 0 proven. 10585 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:45:29,167 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:45:29,167 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76] total 77 [2020-12-22 03:45:29,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530707491] [2020-12-22 03:45:29,168 INFO L461 AbstractCegarLoop]: Interpolant automaton has 77 states [2020-12-22 03:45:29,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:45:29,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2020-12-22 03:45:29,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2020-12-22 03:45:29,169 INFO L87 Difference]: Start difference. First operand 302 states and 303 transitions. Second operand 77 states. [2020-12-22 03:45:29,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:45:29,685 INFO L93 Difference]: Finished difference Result 316 states and 318 transitions. [2020-12-22 03:45:29,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2020-12-22 03:45:29,686 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 300 [2020-12-22 03:45:29,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:45:29,687 INFO L225 Difference]: With dead ends: 316 [2020-12-22 03:45:29,687 INFO L226 Difference]: Without dead ends: 309 [2020-12-22 03:45:29,688 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 375 GetRequests, 300 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2020-12-22 03:45:29,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2020-12-22 03:45:29,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 306. [2020-12-22 03:45:29,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 306 states. [2020-12-22 03:45:29,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 307 transitions. [2020-12-22 03:45:29,691 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 307 transitions. Word has length 300 [2020-12-22 03:45:29,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:45:29,692 INFO L481 AbstractCegarLoop]: Abstraction has 306 states and 307 transitions. [2020-12-22 03:45:29,692 INFO L482 AbstractCegarLoop]: Interpolant automaton has 77 states. [2020-12-22 03:45:29,692 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 307 transitions. [2020-12-22 03:45:29,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 305 [2020-12-22 03:45:29,693 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:45:29,693 INFO L422 BasicCegarLoop]: trace histogram [74, 74, 74, 74, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:45:29,893 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2020-12-22 03:45:29,894 INFO L429 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:45:29,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:45:29,895 INFO L82 PathProgramCache]: Analyzing trace with hash 1688827732, now seen corresponding path program 73 times [2020-12-22 03:45:29,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:45:29,895 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859048983] [2020-12-22 03:45:29,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:45:29,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:45:34,198 INFO L134 CoverageAnalysis]: Checked inductivity of 10878 backedges. 0 proven. 10878 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:45:34,198 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859048983] [2020-12-22 03:45:34,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384873442] [2020-12-22 03:45:34,199 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 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 [2020-12-22 03:45:34,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:45:34,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 2602 conjuncts, 76 conjunts are in the unsatisfiable core [2020-12-22 03:45:34,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:45:35,242 INFO L134 CoverageAnalysis]: Checked inductivity of 10878 backedges. 0 proven. 10878 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:45:35,242 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:45:35,242 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 78 [2020-12-22 03:45:35,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447296801] [2020-12-22 03:45:35,243 INFO L461 AbstractCegarLoop]: Interpolant automaton has 78 states [2020-12-22 03:45:35,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:45:35,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2020-12-22 03:45:35,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2020-12-22 03:45:35,244 INFO L87 Difference]: Start difference. First operand 306 states and 307 transitions. Second operand 78 states. [2020-12-22 03:45:35,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:45:35,748 INFO L93 Difference]: Finished difference Result 320 states and 322 transitions. [2020-12-22 03:45:35,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2020-12-22 03:45:35,749 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 304 [2020-12-22 03:45:35,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:45:35,750 INFO L225 Difference]: With dead ends: 320 [2020-12-22 03:45:35,750 INFO L226 Difference]: Without dead ends: 313 [2020-12-22 03:45:35,751 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 380 GetRequests, 304 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2020-12-22 03:45:35,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2020-12-22 03:45:35,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 310. [2020-12-22 03:45:35,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 310 states. [2020-12-22 03:45:35,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 311 transitions. [2020-12-22 03:45:35,755 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 311 transitions. Word has length 304 [2020-12-22 03:45:35,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:45:35,755 INFO L481 AbstractCegarLoop]: Abstraction has 310 states and 311 transitions. [2020-12-22 03:45:35,755 INFO L482 AbstractCegarLoop]: Interpolant automaton has 78 states. [2020-12-22 03:45:35,755 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 311 transitions. [2020-12-22 03:45:35,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 309 [2020-12-22 03:45:35,756 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:45:35,757 INFO L422 BasicCegarLoop]: trace histogram [75, 75, 75, 75, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:45:35,963 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:45:35,964 INFO L429 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:45:35,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:45:35,964 INFO L82 PathProgramCache]: Analyzing trace with hash 862447387, now seen corresponding path program 74 times [2020-12-22 03:45:35,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:45:35,965 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229575146] [2020-12-22 03:45:35,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:45:36,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:45:40,363 INFO L134 CoverageAnalysis]: Checked inductivity of 11175 backedges. 0 proven. 11175 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:45:40,363 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229575146] [2020-12-22 03:45:40,363 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1680236838] [2020-12-22 03:45:40,364 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 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 [2020-12-22 03:45:40,995 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 03:45:40,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:45:41,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 2636 conjuncts, 77 conjunts are in the unsatisfiable core [2020-12-22 03:45:41,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:45:41,428 INFO L134 CoverageAnalysis]: Checked inductivity of 11175 backedges. 0 proven. 11175 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:45:41,428 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:45:41,428 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78] total 79 [2020-12-22 03:45:41,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963135479] [2020-12-22 03:45:41,429 INFO L461 AbstractCegarLoop]: Interpolant automaton has 79 states [2020-12-22 03:45:41,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:45:41,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2020-12-22 03:45:41,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2020-12-22 03:45:41,430 INFO L87 Difference]: Start difference. First operand 310 states and 311 transitions. Second operand 79 states. [2020-12-22 03:45:41,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:45:41,961 INFO L93 Difference]: Finished difference Result 324 states and 326 transitions. [2020-12-22 03:45:41,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2020-12-22 03:45:41,961 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 308 [2020-12-22 03:45:41,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:45:41,963 INFO L225 Difference]: With dead ends: 324 [2020-12-22 03:45:41,963 INFO L226 Difference]: Without dead ends: 317 [2020-12-22 03:45:41,963 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 385 GetRequests, 308 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2020-12-22 03:45:41,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2020-12-22 03:45:41,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 314. [2020-12-22 03:45:41,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 314 states. [2020-12-22 03:45:41,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 315 transitions. [2020-12-22 03:45:41,968 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 315 transitions. Word has length 308 [2020-12-22 03:45:41,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:45:41,968 INFO L481 AbstractCegarLoop]: Abstraction has 314 states and 315 transitions. [2020-12-22 03:45:41,968 INFO L482 AbstractCegarLoop]: Interpolant automaton has 79 states. [2020-12-22 03:45:41,968 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 315 transitions. [2020-12-22 03:45:41,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 313 [2020-12-22 03:45:41,969 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:45:41,969 INFO L422 BasicCegarLoop]: trace histogram [76, 76, 76, 76, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:45:42,177 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:45:42,178 INFO L429 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:45:42,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:45:42,178 INFO L82 PathProgramCache]: Analyzing trace with hash -1706353822, now seen corresponding path program 75 times [2020-12-22 03:45:42,179 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:45:42,179 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570481074] [2020-12-22 03:45:42,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:45:42,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:45:46,695 INFO L134 CoverageAnalysis]: Checked inductivity of 11476 backedges. 0 proven. 11476 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:45:46,695 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570481074] [2020-12-22 03:45:46,695 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1317895117] [2020-12-22 03:45:46,695 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-22 03:45:47,683 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 77 check-sat command(s) [2020-12-22 03:45:47,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:45:47,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 2670 conjuncts, 78 conjunts are in the unsatisfiable core [2020-12-22 03:45:47,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:45:48,135 INFO L134 CoverageAnalysis]: Checked inductivity of 11476 backedges. 0 proven. 11476 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:45:48,135 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:45:48,136 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79] total 80 [2020-12-22 03:45:48,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456653212] [2020-12-22 03:45:48,136 INFO L461 AbstractCegarLoop]: Interpolant automaton has 80 states [2020-12-22 03:45:48,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:45:48,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2020-12-22 03:45:48,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2020-12-22 03:45:48,137 INFO L87 Difference]: Start difference. First operand 314 states and 315 transitions. Second operand 80 states. [2020-12-22 03:45:48,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:45:48,662 INFO L93 Difference]: Finished difference Result 328 states and 330 transitions. [2020-12-22 03:45:48,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2020-12-22 03:45:48,663 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 312 [2020-12-22 03:45:48,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:45:48,664 INFO L225 Difference]: With dead ends: 328 [2020-12-22 03:45:48,665 INFO L226 Difference]: Without dead ends: 321 [2020-12-22 03:45:48,665 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 390 GetRequests, 312 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2020-12-22 03:45:48,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2020-12-22 03:45:48,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 318. [2020-12-22 03:45:48,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 318 states. [2020-12-22 03:45:48,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 319 transitions. [2020-12-22 03:45:48,669 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 319 transitions. Word has length 312 [2020-12-22 03:45:48,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:45:48,669 INFO L481 AbstractCegarLoop]: Abstraction has 318 states and 319 transitions. [2020-12-22 03:45:48,669 INFO L482 AbstractCegarLoop]: Interpolant automaton has 80 states. [2020-12-22 03:45:48,669 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 319 transitions. [2020-12-22 03:45:48,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 317 [2020-12-22 03:45:48,670 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:45:48,671 INFO L422 BasicCegarLoop]: trace histogram [77, 77, 77, 77, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:45:48,871 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2020-12-22 03:45:48,872 INFO L429 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:45:48,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:45:48,872 INFO L82 PathProgramCache]: Analyzing trace with hash -1201875927, now seen corresponding path program 76 times [2020-12-22 03:45:48,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:45:48,873 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974800194] [2020-12-22 03:45:48,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:45:48,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:45:53,566 INFO L134 CoverageAnalysis]: Checked inductivity of 11781 backedges. 0 proven. 11781 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:45:53,566 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974800194] [2020-12-22 03:45:53,566 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2112203166] [2020-12-22 03:45:53,566 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:45:54,211 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 03:45:54,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:45:54,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 2704 conjuncts, 79 conjunts are in the unsatisfiable core [2020-12-22 03:45:54,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:45:54,625 INFO L134 CoverageAnalysis]: Checked inductivity of 11781 backedges. 0 proven. 11781 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:45:54,625 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:45:54,625 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80] total 81 [2020-12-22 03:45:54,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374747860] [2020-12-22 03:45:54,626 INFO L461 AbstractCegarLoop]: Interpolant automaton has 81 states [2020-12-22 03:45:54,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:45:54,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2020-12-22 03:45:54,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2020-12-22 03:45:54,627 INFO L87 Difference]: Start difference. First operand 318 states and 319 transitions. Second operand 81 states. [2020-12-22 03:45:55,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:45:55,058 INFO L93 Difference]: Finished difference Result 332 states and 334 transitions. [2020-12-22 03:45:55,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2020-12-22 03:45:55,058 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 316 [2020-12-22 03:45:55,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:45:55,060 INFO L225 Difference]: With dead ends: 332 [2020-12-22 03:45:55,060 INFO L226 Difference]: Without dead ends: 325 [2020-12-22 03:45:55,060 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 395 GetRequests, 316 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2020-12-22 03:45:55,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2020-12-22 03:45:55,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 322. [2020-12-22 03:45:55,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 322 states. [2020-12-22 03:45:55,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 323 transitions. [2020-12-22 03:45:55,065 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 323 transitions. Word has length 316 [2020-12-22 03:45:55,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:45:55,065 INFO L481 AbstractCegarLoop]: Abstraction has 322 states and 323 transitions. [2020-12-22 03:45:55,065 INFO L482 AbstractCegarLoop]: Interpolant automaton has 81 states. [2020-12-22 03:45:55,065 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 323 transitions. [2020-12-22 03:45:55,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 321 [2020-12-22 03:45:55,066 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:45:55,066 INFO L422 BasicCegarLoop]: trace histogram [78, 78, 78, 78, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:45:55,267 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2020-12-22 03:45:55,267 INFO L429 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:45:55,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:45:55,268 INFO L82 PathProgramCache]: Analyzing trace with hash -1849241232, now seen corresponding path program 77 times [2020-12-22 03:45:55,268 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:45:55,269 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403571914] [2020-12-22 03:45:55,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:45:55,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:46:00,118 INFO L134 CoverageAnalysis]: Checked inductivity of 12090 backedges. 0 proven. 12090 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:46:00,119 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403571914] [2020-12-22 03:46:00,119 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [368071667] [2020-12-22 03:46:00,119 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 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 [2020-12-22 03:46:01,052 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 79 check-sat command(s) [2020-12-22 03:46:01,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:46:01,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 2738 conjuncts, 80 conjunts are in the unsatisfiable core [2020-12-22 03:46:01,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:46:01,514 INFO L134 CoverageAnalysis]: Checked inductivity of 12090 backedges. 0 proven. 12090 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:46:01,514 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:46:01,515 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81] total 82 [2020-12-22 03:46:01,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144502020] [2020-12-22 03:46:01,515 INFO L461 AbstractCegarLoop]: Interpolant automaton has 82 states [2020-12-22 03:46:01,516 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:46:01,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2020-12-22 03:46:01,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2020-12-22 03:46:01,518 INFO L87 Difference]: Start difference. First operand 322 states and 323 transitions. Second operand 82 states. [2020-12-22 03:46:02,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:46:02,095 INFO L93 Difference]: Finished difference Result 336 states and 338 transitions. [2020-12-22 03:46:02,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2020-12-22 03:46:02,095 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 320 [2020-12-22 03:46:02,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:46:02,097 INFO L225 Difference]: With dead ends: 336 [2020-12-22 03:46:02,097 INFO L226 Difference]: Without dead ends: 329 [2020-12-22 03:46:02,097 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 400 GetRequests, 320 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2020-12-22 03:46:02,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2020-12-22 03:46:02,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 326. [2020-12-22 03:46:02,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 326 states. [2020-12-22 03:46:02,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 327 transitions. [2020-12-22 03:46:02,104 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 327 transitions. Word has length 320 [2020-12-22 03:46:02,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:46:02,104 INFO L481 AbstractCegarLoop]: Abstraction has 326 states and 327 transitions. [2020-12-22 03:46:02,104 INFO L482 AbstractCegarLoop]: Interpolant automaton has 82 states. [2020-12-22 03:46:02,105 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 327 transitions. [2020-12-22 03:46:02,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2020-12-22 03:46:02,106 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:46:02,106 INFO L422 BasicCegarLoop]: trace histogram [79, 79, 79, 79, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:46:02,307 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:46:02,307 INFO L429 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:46:02,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:46:02,308 INFO L82 PathProgramCache]: Analyzing trace with hash 2144523063, now seen corresponding path program 78 times [2020-12-22 03:46:02,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:46:02,308 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948626591] [2020-12-22 03:46:02,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:46:02,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:46:07,272 INFO L134 CoverageAnalysis]: Checked inductivity of 12403 backedges. 0 proven. 12403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:46:07,273 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948626591] [2020-12-22 03:46:07,273 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [978820314] [2020-12-22 03:46:07,273 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 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 [2020-12-22 03:46:08,283 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 80 check-sat command(s) [2020-12-22 03:46:08,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:46:08,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 2772 conjuncts, 81 conjunts are in the unsatisfiable core [2020-12-22 03:46:08,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:46:08,755 INFO L134 CoverageAnalysis]: Checked inductivity of 12403 backedges. 0 proven. 12403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:46:08,756 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:46:08,756 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 82] total 83 [2020-12-22 03:46:08,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575511137] [2020-12-22 03:46:08,757 INFO L461 AbstractCegarLoop]: Interpolant automaton has 83 states [2020-12-22 03:46:08,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:46:08,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2020-12-22 03:46:08,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2020-12-22 03:46:08,758 INFO L87 Difference]: Start difference. First operand 326 states and 327 transitions. Second operand 83 states. [2020-12-22 03:46:09,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:46:09,358 INFO L93 Difference]: Finished difference Result 340 states and 342 transitions. [2020-12-22 03:46:09,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2020-12-22 03:46:09,359 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 324 [2020-12-22 03:46:09,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:46:09,360 INFO L225 Difference]: With dead ends: 340 [2020-12-22 03:46:09,360 INFO L226 Difference]: Without dead ends: 333 [2020-12-22 03:46:09,361 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 405 GetRequests, 324 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2020-12-22 03:46:09,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2020-12-22 03:46:09,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 330. [2020-12-22 03:46:09,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 330 states. [2020-12-22 03:46:09,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 331 transitions. [2020-12-22 03:46:09,365 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 331 transitions. Word has length 324 [2020-12-22 03:46:09,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:46:09,365 INFO L481 AbstractCegarLoop]: Abstraction has 330 states and 331 transitions. [2020-12-22 03:46:09,365 INFO L482 AbstractCegarLoop]: Interpolant automaton has 83 states. [2020-12-22 03:46:09,365 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 331 transitions. [2020-12-22 03:46:09,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2020-12-22 03:46:09,366 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:46:09,366 INFO L422 BasicCegarLoop]: trace histogram [80, 80, 80, 80, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:46:09,567 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:46:09,567 INFO L429 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:46:09,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:46:09,568 INFO L82 PathProgramCache]: Analyzing trace with hash -1595238018, now seen corresponding path program 79 times [2020-12-22 03:46:09,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:46:09,568 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309884700] [2020-12-22 03:46:09,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:46:09,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:46:14,680 INFO L134 CoverageAnalysis]: Checked inductivity of 12720 backedges. 0 proven. 12720 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:46:14,680 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309884700] [2020-12-22 03:46:14,680 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1466643554] [2020-12-22 03:46:14,680 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 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 [2020-12-22 03:46:15,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:46:15,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 2806 conjuncts, 82 conjunts are in the unsatisfiable core [2020-12-22 03:46:15,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:46:15,812 INFO L134 CoverageAnalysis]: Checked inductivity of 12720 backedges. 0 proven. 12720 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:46:15,812 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:46:15,812 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 83] total 84 [2020-12-22 03:46:15,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141167688] [2020-12-22 03:46:15,813 INFO L461 AbstractCegarLoop]: Interpolant automaton has 84 states [2020-12-22 03:46:15,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:46:15,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2020-12-22 03:46:15,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2020-12-22 03:46:15,814 INFO L87 Difference]: Start difference. First operand 330 states and 331 transitions. Second operand 84 states. [2020-12-22 03:46:16,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:46:16,387 INFO L93 Difference]: Finished difference Result 344 states and 346 transitions. [2020-12-22 03:46:16,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2020-12-22 03:46:16,388 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 328 [2020-12-22 03:46:16,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:46:16,390 INFO L225 Difference]: With dead ends: 344 [2020-12-22 03:46:16,390 INFO L226 Difference]: Without dead ends: 337 [2020-12-22 03:46:16,391 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 410 GetRequests, 328 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2020-12-22 03:46:16,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2020-12-22 03:46:16,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 334. [2020-12-22 03:46:16,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 334 states. [2020-12-22 03:46:16,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 335 transitions. [2020-12-22 03:46:16,395 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 335 transitions. Word has length 328 [2020-12-22 03:46:16,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:46:16,395 INFO L481 AbstractCegarLoop]: Abstraction has 334 states and 335 transitions. [2020-12-22 03:46:16,395 INFO L482 AbstractCegarLoop]: Interpolant automaton has 84 states. [2020-12-22 03:46:16,395 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 335 transitions. [2020-12-22 03:46:16,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2020-12-22 03:46:16,396 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:46:16,396 INFO L422 BasicCegarLoop]: trace histogram [81, 81, 81, 81, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:46:16,597 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:46:16,597 INFO L429 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:46:16,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:46:16,598 INFO L82 PathProgramCache]: Analyzing trace with hash 1217913925, now seen corresponding path program 80 times [2020-12-22 03:46:16,598 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:46:16,598 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120737212] [2020-12-22 03:46:16,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:46:16,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:46:21,932 INFO L134 CoverageAnalysis]: Checked inductivity of 13041 backedges. 0 proven. 13041 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:46:21,932 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120737212] [2020-12-22 03:46:21,932 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1419204722] [2020-12-22 03:46:21,932 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:46:22,611 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 03:46:22,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:46:22,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 2840 conjuncts, 83 conjunts are in the unsatisfiable core [2020-12-22 03:46:22,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:46:23,039 INFO L134 CoverageAnalysis]: Checked inductivity of 13041 backedges. 0 proven. 13041 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:46:23,039 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:46:23,040 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 84] total 85 [2020-12-22 03:46:23,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102150067] [2020-12-22 03:46:23,040 INFO L461 AbstractCegarLoop]: Interpolant automaton has 85 states [2020-12-22 03:46:23,040 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:46:23,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2020-12-22 03:46:23,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2020-12-22 03:46:23,041 INFO L87 Difference]: Start difference. First operand 334 states and 335 transitions. Second operand 85 states. [2020-12-22 03:46:23,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:46:23,591 INFO L93 Difference]: Finished difference Result 348 states and 350 transitions. [2020-12-22 03:46:23,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2020-12-22 03:46:23,592 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 332 [2020-12-22 03:46:23,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:46:23,593 INFO L225 Difference]: With dead ends: 348 [2020-12-22 03:46:23,593 INFO L226 Difference]: Without dead ends: 341 [2020-12-22 03:46:23,594 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 415 GetRequests, 332 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2020-12-22 03:46:23,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2020-12-22 03:46:23,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 338. [2020-12-22 03:46:23,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 338 states. [2020-12-22 03:46:23,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 339 transitions. [2020-12-22 03:46:23,598 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 339 transitions. Word has length 332 [2020-12-22 03:46:23,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:46:23,598 INFO L481 AbstractCegarLoop]: Abstraction has 338 states and 339 transitions. [2020-12-22 03:46:23,598 INFO L482 AbstractCegarLoop]: Interpolant automaton has 85 states. [2020-12-22 03:46:23,598 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 339 transitions. [2020-12-22 03:46:23,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 337 [2020-12-22 03:46:23,620 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:46:23,621 INFO L422 BasicCegarLoop]: trace histogram [82, 82, 82, 82, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:46:23,821 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:46:23,821 INFO L429 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:46:23,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:46:23,822 INFO L82 PathProgramCache]: Analyzing trace with hash 1870951308, now seen corresponding path program 81 times [2020-12-22 03:46:23,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:46:23,823 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218252032] [2020-12-22 03:46:23,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:46:23,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat