/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/reducercommutativity/rangesum40.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-21 21:56:59,660 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-21 21:56:59,666 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-21 21:56:59,735 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-12-21 21:56:59,879 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-21 21:56:59,881 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-21 21:56:59,882 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-21 21:56:59,883 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-21 21:56:59,948 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-21 21:56:59,948 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-21 21:56:59,950 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-21 21:56:59,951 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-21 21:56:59,951 INFO L138 SettingsManager]: * Use SBE=true [2020-12-21 21:56:59,952 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-21 21:56:59,952 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-21 21:56:59,952 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-21 21:56:59,952 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-21 21:56:59,953 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-21 21:56:59,953 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-21 21:56:59,953 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-21 21:56:59,953 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-21 21:56:59,954 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-21 21:56:59,954 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-21 21:56:59,954 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-21 21:56:59,954 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-21 21:56:59,955 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-21 21:56:59,955 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-21 21:56:59,955 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-21 21:56:59,956 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-21 21:56:59,956 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-21 21:56:59,956 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-21 21:56:59,956 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-21 21:56:59,956 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-21 21:56:59,957 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-21 21:57:00,479 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-21 21:57:00,519 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-21 21:57:00,525 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-21 21:57:00,528 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-21 21:57:00,530 INFO L275 PluginConnector]: CDTParser initialized [2020-12-21 21:57:00,531 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/reducercommutativity/rangesum40.i [2020-12-21 21:57:00,644 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/71d6ffe82/a253063455734d8f81a28344030029e2/FLAGfd1dd5b46 [2020-12-21 21:57:01,580 INFO L306 CDTParser]: Found 1 translation units. [2020-12-21 21:57:01,581 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/reducercommutativity/rangesum40.i [2020-12-21 21:57:01,593 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/71d6ffe82/a253063455734d8f81a28344030029e2/FLAGfd1dd5b46 [2020-12-21 21:57:01,865 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/71d6ffe82/a253063455734d8f81a28344030029e2 [2020-12-21 21:57:01,870 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-21 21:57:01,874 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-21 21:57:01,878 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-21 21:57:01,878 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-21 21:57:01,884 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-21 21:57:01,886 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 09:57:01" (1/1) ... [2020-12-21 21:57:01,890 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1ba7b945 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:57:01, skipping insertion in model container [2020-12-21 21:57:01,890 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 09:57:01" (1/1) ... [2020-12-21 21:57:01,903 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-21 21:57:01,931 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-21 21:57:02,318 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/reducercommutativity/rangesum40.i[1465,1478] [2020-12-21 21:57:02,333 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-21 21:57:02,357 INFO L203 MainTranslator]: Completed pre-run [2020-12-21 21:57:02,431 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/reducercommutativity/rangesum40.i[1465,1478] [2020-12-21 21:57:02,435 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-21 21:57:02,468 INFO L208 MainTranslator]: Completed translation [2020-12-21 21:57:02,469 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:57:02 WrapperNode [2020-12-21 21:57:02,470 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-21 21:57:02,473 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-21 21:57:02,473 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-21 21:57:02,474 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-21 21:57:02,488 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:57:02" (1/1) ... [2020-12-21 21:57:02,514 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:57:02" (1/1) ... [2020-12-21 21:57:02,573 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-21 21:57:02,578 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-21 21:57:02,578 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-21 21:57:02,579 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-21 21:57:02,593 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:57:02" (1/1) ... [2020-12-21 21:57:02,593 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:57:02" (1/1) ... [2020-12-21 21:57:02,608 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:57:02" (1/1) ... [2020-12-21 21:57:02,609 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:57:02" (1/1) ... [2020-12-21 21:57:02,631 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:57:02" (1/1) ... [2020-12-21 21:57:02,645 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:57:02" (1/1) ... [2020-12-21 21:57:02,647 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:57:02" (1/1) ... [2020-12-21 21:57:02,655 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-21 21:57:02,660 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-21 21:57:02,661 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-21 21:57:02,661 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-21 21:57:02,666 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:57:02" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-21 21:57:02,801 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-21 21:57:02,801 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-21 21:57:02,801 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-21 21:57:02,802 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-21 21:57:02,802 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-21 21:57:02,802 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-21 21:57:02,803 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-21 21:57:03,520 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-21 21:57:03,521 INFO L299 CfgBuilder]: Removed 17 assume(true) statements. [2020-12-21 21:57:03,524 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 09:57:03 BoogieIcfgContainer [2020-12-21 21:57:03,524 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-21 21:57:03,527 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-21 21:57:03,527 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-21 21:57:03,532 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-21 21:57:03,532 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 09:57:01" (1/3) ... [2020-12-21 21:57:03,534 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6256b6c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 09:57:03, skipping insertion in model container [2020-12-21 21:57:03,534 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:57:02" (2/3) ... [2020-12-21 21:57:03,534 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6256b6c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 09:57:03, skipping insertion in model container [2020-12-21 21:57:03,535 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 09:57:03" (3/3) ... [2020-12-21 21:57:03,537 INFO L111 eAbstractionObserver]: Analyzing ICFG rangesum40.i [2020-12-21 21:57:03,546 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-21 21:57:03,554 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-21 21:57:03,585 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-21 21:57:03,641 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-21 21:57:03,642 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-21 21:57:03,642 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-21 21:57:03,642 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-21 21:57:03,642 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-21 21:57:03,642 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-21 21:57:03,643 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-21 21:57:03,643 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-21 21:57:03,666 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states. [2020-12-21 21:57:03,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-21 21:57:03,675 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:57:03,677 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:57:03,679 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:57:03,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:57:03,690 INFO L82 PathProgramCache]: Analyzing trace with hash -919167012, now seen corresponding path program 1 times [2020-12-21 21:57:03,707 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:57:03,710 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484786201] [2020-12-21 21:57:03,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:57:03,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:57:04,063 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:57:04,064 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484786201] [2020-12-21 21:57:04,067 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 21:57:04,068 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-21 21:57:04,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834845335] [2020-12-21 21:57:04,077 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-21 21:57:04,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:57:04,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-21 21:57:04,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-21 21:57:04,108 INFO L87 Difference]: Start difference. First operand 30 states. Second operand 2 states. [2020-12-21 21:57:04,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:57:04,143 INFO L93 Difference]: Finished difference Result 56 states and 86 transitions. [2020-12-21 21:57:04,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-21 21:57:04,145 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 17 [2020-12-21 21:57:04,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:57:04,158 INFO L225 Difference]: With dead ends: 56 [2020-12-21 21:57:04,159 INFO L226 Difference]: Without dead ends: 26 [2020-12-21 21:57:04,164 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-21 21:57:04,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-12-21 21:57:04,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-12-21 21:57:04,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-12-21 21:57:04,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 36 transitions. [2020-12-21 21:57:04,214 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 36 transitions. Word has length 17 [2020-12-21 21:57:04,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:57:04,214 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 36 transitions. [2020-12-21 21:57:04,215 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-21 21:57:04,215 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 36 transitions. [2020-12-21 21:57:04,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-21 21:57:04,216 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:57:04,219 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:57:04,220 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-21 21:57:04,220 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:57:04,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:57:04,221 INFO L82 PathProgramCache]: Analyzing trace with hash 164788593, now seen corresponding path program 1 times [2020-12-21 21:57:04,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:57:04,222 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644091017] [2020-12-21 21:57:04,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:57:04,263 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 21:57:04,264 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1957621867] [2020-12-21 21:57:04,264 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 [2020-12-21 21:57:04,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:57:04,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-21 21:57:04,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:57:04,437 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:57:04,438 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644091017] [2020-12-21 21:57:04,439 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 21:57:04,439 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1957621867] [2020-12-21 21:57:04,439 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 21:57:04,440 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-21 21:57:04,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102333999] [2020-12-21 21:57:04,442 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-21 21:57:04,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:57:04,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-21 21:57:04,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-21 21:57:04,444 INFO L87 Difference]: Start difference. First operand 26 states and 36 transitions. Second operand 3 states. [2020-12-21 21:57:04,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:57:04,473 INFO L93 Difference]: Finished difference Result 50 states and 70 transitions. [2020-12-21 21:57:04,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-21 21:57:04,474 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-12-21 21:57:04,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:57:04,475 INFO L225 Difference]: With dead ends: 50 [2020-12-21 21:57:04,475 INFO L226 Difference]: Without dead ends: 28 [2020-12-21 21:57:04,476 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-21 21:57:04,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-12-21 21:57:04,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2020-12-21 21:57:04,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-12-21 21:57:04,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 37 transitions. [2020-12-21 21:57:04,484 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 37 transitions. Word has length 17 [2020-12-21 21:57:04,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:57:04,485 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 37 transitions. [2020-12-21 21:57:04,485 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-21 21:57:04,485 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 37 transitions. [2020-12-21 21:57:04,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-21 21:57:04,486 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:57:04,486 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:57:04,694 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-12-21 21:57:04,696 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:57:04,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:57:04,697 INFO L82 PathProgramCache]: Analyzing trace with hash -1403287377, now seen corresponding path program 1 times [2020-12-21 21:57:04,698 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:57:04,698 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475497522] [2020-12-21 21:57:04,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:57:04,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:57:04,773 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:57:04,774 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475497522] [2020-12-21 21:57:04,774 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699974053] [2020-12-21 21:57:04,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:57:04,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:57:04,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-21 21:57:04,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:57:04,953 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-21 21:57:04,954 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-21 21:57:04,954 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2020-12-21 21:57:04,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688949031] [2020-12-21 21:57:04,957 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-21 21:57:04,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:57:04,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-21 21:57:04,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-21 21:57:04,970 INFO L87 Difference]: Start difference. First operand 27 states and 37 transitions. Second operand 3 states. [2020-12-21 21:57:05,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:57:05,081 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2020-12-21 21:57:05,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-21 21:57:05,082 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-12-21 21:57:05,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:57:05,084 INFO L225 Difference]: With dead ends: 57 [2020-12-21 21:57:05,084 INFO L226 Difference]: Without dead ends: 36 [2020-12-21 21:57:05,085 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-21 21:57:05,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-12-21 21:57:05,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 33. [2020-12-21 21:57:05,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-12-21 21:57:05,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 43 transitions. [2020-12-21 21:57:05,093 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 43 transitions. Word has length 19 [2020-12-21 21:57:05,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:57:05,094 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 43 transitions. [2020-12-21 21:57:05,094 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-21 21:57:05,094 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 43 transitions. [2020-12-21 21:57:05,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-12-21 21:57:05,095 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:57:05,096 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:57:05,309 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:57:05,310 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:57:05,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:57:05,312 INFO L82 PathProgramCache]: Analyzing trace with hash -1132417868, now seen corresponding path program 1 times [2020-12-21 21:57:05,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:57:05,314 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656548755] [2020-12-21 21:57:05,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:57:05,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:57:05,372 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-21 21:57:05,372 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656548755] [2020-12-21 21:57:05,373 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582908123] [2020-12-21 21:57:05,373 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 [2020-12-21 21:57:05,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:57:05,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-21 21:57:05,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:57:05,549 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-21 21:57:05,550 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-21 21:57:05,550 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2020-12-21 21:57:05,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927196625] [2020-12-21 21:57:05,551 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-21 21:57:05,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:57:05,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-21 21:57:05,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-21 21:57:05,553 INFO L87 Difference]: Start difference. First operand 33 states and 43 transitions. Second operand 3 states. [2020-12-21 21:57:05,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:57:05,580 INFO L93 Difference]: Finished difference Result 46 states and 59 transitions. [2020-12-21 21:57:05,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-21 21:57:05,581 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2020-12-21 21:57:05,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:57:05,582 INFO L225 Difference]: With dead ends: 46 [2020-12-21 21:57:05,582 INFO L226 Difference]: Without dead ends: 35 [2020-12-21 21:57:05,584 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-21 21:57:05,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-12-21 21:57:05,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2020-12-21 21:57:05,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-12-21 21:57:05,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 44 transitions. [2020-12-21 21:57:05,607 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 44 transitions. Word has length 28 [2020-12-21 21:57:05,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:57:05,607 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 44 transitions. [2020-12-21 21:57:05,607 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-21 21:57:05,608 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 44 transitions. [2020-12-21 21:57:05,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-12-21 21:57:05,611 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:57:05,611 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:57:05,813 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:57:05,814 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:57:05,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:57:05,816 INFO L82 PathProgramCache]: Analyzing trace with hash 513768630, now seen corresponding path program 1 times [2020-12-21 21:57:05,816 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:57:05,817 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487887592] [2020-12-21 21:57:05,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:57:05,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:57:05,870 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-21 21:57:05,870 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487887592] [2020-12-21 21:57:05,871 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932009442] [2020-12-21 21:57:05,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:57:05,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:57:05,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-21 21:57:05,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:57:05,982 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-21 21:57:05,982 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-21 21:57:05,983 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2020-12-21 21:57:05,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626223987] [2020-12-21 21:57:05,984 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-21 21:57:05,984 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:57:05,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-21 21:57:05,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-21 21:57:05,985 INFO L87 Difference]: Start difference. First operand 34 states and 44 transitions. Second operand 3 states. [2020-12-21 21:57:06,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:57:06,036 INFO L93 Difference]: Finished difference Result 78 states and 103 transitions. [2020-12-21 21:57:06,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-21 21:57:06,036 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 30 [2020-12-21 21:57:06,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:57:06,037 INFO L225 Difference]: With dead ends: 78 [2020-12-21 21:57:06,038 INFO L226 Difference]: Without dead ends: 56 [2020-12-21 21:57:06,038 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-21 21:57:06,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-12-21 21:57:06,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 46. [2020-12-21 21:57:06,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-12-21 21:57:06,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 62 transitions. [2020-12-21 21:57:06,046 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 62 transitions. Word has length 30 [2020-12-21 21:57:06,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:57:06,047 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 62 transitions. [2020-12-21 21:57:06,047 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-21 21:57:06,047 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 62 transitions. [2020-12-21 21:57:06,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-12-21 21:57:06,048 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:57:06,048 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:57:06,261 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:57:06,263 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:57:06,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:57:06,265 INFO L82 PathProgramCache]: Analyzing trace with hash -303820238, now seen corresponding path program 1 times [2020-12-21 21:57:06,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:57:06,266 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818899334] [2020-12-21 21:57:06,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:57:06,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:57:06,310 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-21 21:57:06,311 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818899334] [2020-12-21 21:57:06,311 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [994141571] [2020-12-21 21:57:06,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-12-21 21:57:06,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:57:06,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-21 21:57:06,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:57:06,505 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-21 21:57:06,506 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:57:06,508 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-21 21:57:06,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80425750] [2020-12-21 21:57:06,511 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-21 21:57:06,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:57:06,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-21 21:57:06,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-21 21:57:06,512 INFO L87 Difference]: Start difference. First operand 46 states and 62 transitions. Second operand 5 states. [2020-12-21 21:57:06,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:57:06,562 INFO L93 Difference]: Finished difference Result 90 states and 122 transitions. [2020-12-21 21:57:06,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-21 21:57:06,566 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 30 [2020-12-21 21:57:06,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:57:06,567 INFO L225 Difference]: With dead ends: 90 [2020-12-21 21:57:06,567 INFO L226 Difference]: Without dead ends: 49 [2020-12-21 21:57:06,570 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-21 21:57:06,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-12-21 21:57:06,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2020-12-21 21:57:06,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-12-21 21:57:06,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 64 transitions. [2020-12-21 21:57:06,585 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 64 transitions. Word has length 30 [2020-12-21 21:57:06,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:57:06,588 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 64 transitions. [2020-12-21 21:57:06,588 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-21 21:57:06,588 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 64 transitions. [2020-12-21 21:57:06,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-12-21 21:57:06,590 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:57:06,590 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:57:06,791 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-12-21 21:57:06,792 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:57:06,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:57:06,792 INFO L82 PathProgramCache]: Analyzing trace with hash 612513716, now seen corresponding path program 2 times [2020-12-21 21:57:06,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:57:06,793 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612038110] [2020-12-21 21:57:06,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:57:06,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:57:06,911 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-21 21:57:06,911 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612038110] [2020-12-21 21:57:06,911 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1618218903] [2020-12-21 21:57:06,912 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 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 [2020-12-21 21:57:06,987 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-12-21 21:57:06,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:57:06,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-21 21:57:06,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:57:07,154 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-12-21 21:57:07,155 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-21 21:57:07,155 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [4] total 10 [2020-12-21 21:57:07,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810912253] [2020-12-21 21:57:07,156 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-21 21:57:07,156 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:57:07,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-21 21:57:07,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-12-21 21:57:07,166 INFO L87 Difference]: Start difference. First operand 48 states and 64 transitions. Second operand 8 states. [2020-12-21 21:57:07,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:57:07,250 INFO L93 Difference]: Finished difference Result 114 states and 143 transitions. [2020-12-21 21:57:07,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-21 21:57:07,251 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 32 [2020-12-21 21:57:07,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:57:07,253 INFO L225 Difference]: With dead ends: 114 [2020-12-21 21:57:07,253 INFO L226 Difference]: Without dead ends: 109 [2020-12-21 21:57:07,254 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-12-21 21:57:07,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-12-21 21:57:07,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 73. [2020-12-21 21:57:07,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-12-21 21:57:07,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 98 transitions. [2020-12-21 21:57:07,268 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 98 transitions. Word has length 32 [2020-12-21 21:57:07,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:57:07,269 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 98 transitions. [2020-12-21 21:57:07,269 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-21 21:57:07,269 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 98 transitions. [2020-12-21 21:57:07,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-12-21 21:57:07,270 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:57:07,271 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:57:07,484 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:57:07,485 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:57:07,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:57:07,486 INFO L82 PathProgramCache]: Analyzing trace with hash -582685651, now seen corresponding path program 1 times [2020-12-21 21:57:07,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:57:07,486 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603265589] [2020-12-21 21:57:07,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:57:07,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:57:07,535 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-12-21 21:57:07,535 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603265589] [2020-12-21 21:57:07,536 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [825170214] [2020-12-21 21:57:07,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:57:07,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:57:07,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-21 21:57:07,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:57:07,690 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-12-21 21:57:07,691 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:57:07,691 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 7 [2020-12-21 21:57:07,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255644464] [2020-12-21 21:57:07,692 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-21 21:57:07,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:57:07,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-21 21:57:07,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-21 21:57:07,694 INFO L87 Difference]: Start difference. First operand 73 states and 98 transitions. Second operand 7 states. [2020-12-21 21:57:07,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:57:07,831 INFO L93 Difference]: Finished difference Result 162 states and 221 transitions. [2020-12-21 21:57:07,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-21 21:57:07,832 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 35 [2020-12-21 21:57:07,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:57:07,836 INFO L225 Difference]: With dead ends: 162 [2020-12-21 21:57:07,836 INFO L226 Difference]: Without dead ends: 96 [2020-12-21 21:57:07,838 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-21 21:57:07,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-12-21 21:57:07,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 90. [2020-12-21 21:57:07,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-12-21 21:57:07,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 115 transitions. [2020-12-21 21:57:07,850 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 115 transitions. Word has length 35 [2020-12-21 21:57:07,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:57:07,851 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 115 transitions. [2020-12-21 21:57:07,851 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-21 21:57:07,851 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 115 transitions. [2020-12-21 21:57:07,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-12-21 21:57:07,852 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:57:07,853 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:57:08,068 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:57:08,069 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:57:08,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:57:08,071 INFO L82 PathProgramCache]: Analyzing trace with hash 2109979210, now seen corresponding path program 2 times [2020-12-21 21:57:08,072 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:57:08,072 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772370033] [2020-12-21 21:57:08,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:57:08,092 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 21:57:08,093 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [846490859] [2020-12-21 21:57:08,093 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:57:08,185 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 21:57:08,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:57:08,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-21 21:57:08,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:57:08,263 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2020-12-21 21:57:08,263 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772370033] [2020-12-21 21:57:08,263 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 21:57:08,264 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [846490859] [2020-12-21 21:57:08,264 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 21:57:08,264 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-12-21 21:57:08,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236713959] [2020-12-21 21:57:08,265 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-21 21:57:08,265 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:57:08,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-21 21:57:08,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-21 21:57:08,266 INFO L87 Difference]: Start difference. First operand 90 states and 115 transitions. Second operand 6 states. [2020-12-21 21:57:08,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:57:08,297 INFO L93 Difference]: Finished difference Result 174 states and 224 transitions. [2020-12-21 21:57:08,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-21 21:57:08,297 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 46 [2020-12-21 21:57:08,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:57:08,298 INFO L225 Difference]: With dead ends: 174 [2020-12-21 21:57:08,299 INFO L226 Difference]: Without dead ends: 93 [2020-12-21 21:57:08,300 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-21 21:57:08,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-12-21 21:57:08,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 92. [2020-12-21 21:57:08,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-12-21 21:57:08,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 117 transitions. [2020-12-21 21:57:08,310 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 117 transitions. Word has length 46 [2020-12-21 21:57:08,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:57:08,310 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 117 transitions. [2020-12-21 21:57:08,310 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-21 21:57:08,310 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 117 transitions. [2020-12-21 21:57:08,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-12-21 21:57:08,312 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:57:08,312 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:57:08,525 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-12-21 21:57:08,526 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:57:08,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:57:08,528 INFO L82 PathProgramCache]: Analyzing trace with hash 1002085324, now seen corresponding path program 3 times [2020-12-21 21:57:08,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:57:08,529 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325621702] [2020-12-21 21:57:08,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:57:08,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:57:08,638 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-12-21 21:57:08,639 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325621702] [2020-12-21 21:57:08,640 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 21:57:08,640 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-21 21:57:08,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760142056] [2020-12-21 21:57:08,641 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-21 21:57:08,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:57:08,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-21 21:57:08,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-21 21:57:08,642 INFO L87 Difference]: Start difference. First operand 92 states and 117 transitions. Second operand 4 states. [2020-12-21 21:57:08,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:57:08,739 INFO L93 Difference]: Finished difference Result 177 states and 232 transitions. [2020-12-21 21:57:08,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-21 21:57:08,739 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 48 [2020-12-21 21:57:08,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:57:08,741 INFO L225 Difference]: With dead ends: 177 [2020-12-21 21:57:08,741 INFO L226 Difference]: Without dead ends: 108 [2020-12-21 21:57:08,742 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-21 21:57:08,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-12-21 21:57:08,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 83. [2020-12-21 21:57:08,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-12-21 21:57:08,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 99 transitions. [2020-12-21 21:57:08,766 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 99 transitions. Word has length 48 [2020-12-21 21:57:08,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:57:08,767 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 99 transitions. [2020-12-21 21:57:08,767 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-21 21:57:08,767 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 99 transitions. [2020-12-21 21:57:08,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-21 21:57:08,768 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:57:08,768 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:57:08,769 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-21 21:57:08,769 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:57:08,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:57:08,770 INFO L82 PathProgramCache]: Analyzing trace with hash 238121238, now seen corresponding path program 1 times [2020-12-21 21:57:08,775 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:57:08,775 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82573628] [2020-12-21 21:57:08,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:57:08,799 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 21:57:08,799 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1546447975] [2020-12-21 21:57:08,800 INFO L95 rtionOrderModulation]: Keeping assertion order 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 [2020-12-21 21:57:08,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:57:08,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-21 21:57:08,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:57:09,023 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2020-12-21 21:57:09,024 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82573628] [2020-12-21 21:57:09,025 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 21:57:09,025 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546447975] [2020-12-21 21:57:09,026 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 21:57:09,026 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-12-21 21:57:09,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876284294] [2020-12-21 21:57:09,027 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-21 21:57:09,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:57:09,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-21 21:57:09,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-21 21:57:09,031 INFO L87 Difference]: Start difference. First operand 83 states and 99 transitions. Second operand 7 states. [2020-12-21 21:57:09,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:57:09,086 INFO L93 Difference]: Finished difference Result 158 states and 190 transitions. [2020-12-21 21:57:09,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-21 21:57:09,087 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 54 [2020-12-21 21:57:09,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:57:09,089 INFO L225 Difference]: With dead ends: 158 [2020-12-21 21:57:09,090 INFO L226 Difference]: Without dead ends: 86 [2020-12-21 21:57:09,091 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-21 21:57:09,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-12-21 21:57:09,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2020-12-21 21:57:09,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-12-21 21:57:09,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 101 transitions. [2020-12-21 21:57:09,099 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 101 transitions. Word has length 54 [2020-12-21 21:57:09,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:57:09,099 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 101 transitions. [2020-12-21 21:57:09,099 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-21 21:57:09,099 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 101 transitions. [2020-12-21 21:57:09,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-12-21 21:57:09,101 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:57:09,101 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:57:09,316 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:57:09,318 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:57:09,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:57:09,319 INFO L82 PathProgramCache]: Analyzing trace with hash -428363624, now seen corresponding path program 2 times [2020-12-21 21:57:09,319 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:57:09,319 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996241083] [2020-12-21 21:57:09,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:57:09,350 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 21:57:09,350 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [202149080] [2020-12-21 21:57:09,351 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 [2020-12-21 21:57:09,461 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 21:57:09,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:57:09,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-21 21:57:09,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:57:09,623 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2020-12-21 21:57:09,624 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996241083] [2020-12-21 21:57:09,624 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 21:57:09,624 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202149080] [2020-12-21 21:57:09,624 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 21:57:09,624 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-12-21 21:57:09,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335761192] [2020-12-21 21:57:09,625 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-21 21:57:09,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:57:09,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-21 21:57:09,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-21 21:57:09,627 INFO L87 Difference]: Start difference. First operand 85 states and 101 transitions. Second operand 8 states. [2020-12-21 21:57:09,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:57:09,665 INFO L93 Difference]: Finished difference Result 160 states and 192 transitions. [2020-12-21 21:57:09,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-21 21:57:09,665 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 56 [2020-12-21 21:57:09,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:57:09,666 INFO L225 Difference]: With dead ends: 160 [2020-12-21 21:57:09,666 INFO L226 Difference]: Without dead ends: 88 [2020-12-21 21:57:09,667 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-21 21:57:09,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-12-21 21:57:09,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 87. [2020-12-21 21:57:09,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-12-21 21:57:09,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 103 transitions. [2020-12-21 21:57:09,675 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 103 transitions. Word has length 56 [2020-12-21 21:57:09,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:57:09,675 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 103 transitions. [2020-12-21 21:57:09,675 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-21 21:57:09,675 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 103 transitions. [2020-12-21 21:57:09,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-12-21 21:57:09,676 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:57:09,677 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:57:09,891 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:57:09,892 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:57:09,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:57:09,893 INFO L82 PathProgramCache]: Analyzing trace with hash -970188902, now seen corresponding path program 3 times [2020-12-21 21:57:09,894 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:57:09,894 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358143381] [2020-12-21 21:57:09,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:57:09,926 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 21:57:09,927 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1633892441] [2020-12-21 21:57:09,927 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 [2020-12-21 21:57:10,013 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-21 21:57:10,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:57:10,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-21 21:57:10,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:57:10,115 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2020-12-21 21:57:10,116 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358143381] [2020-12-21 21:57:10,116 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 21:57:10,116 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1633892441] [2020-12-21 21:57:10,117 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 21:57:10,117 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-21 21:57:10,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559944279] [2020-12-21 21:57:10,124 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-21 21:57:10,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:57:10,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-21 21:57:10,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-21 21:57:10,126 INFO L87 Difference]: Start difference. First operand 87 states and 103 transitions. Second operand 4 states. [2020-12-21 21:57:10,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:57:10,169 INFO L93 Difference]: Finished difference Result 116 states and 138 transitions. [2020-12-21 21:57:10,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-21 21:57:10,170 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 58 [2020-12-21 21:57:10,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:57:10,171 INFO L225 Difference]: With dead ends: 116 [2020-12-21 21:57:10,172 INFO L226 Difference]: Without dead ends: 68 [2020-12-21 21:57:10,172 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-21 21:57:10,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-12-21 21:57:10,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 59. [2020-12-21 21:57:10,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-12-21 21:57:10,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 66 transitions. [2020-12-21 21:57:10,178 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 66 transitions. Word has length 58 [2020-12-21 21:57:10,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:57:10,179 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 66 transitions. [2020-12-21 21:57:10,179 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-21 21:57:10,179 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 66 transitions. [2020-12-21 21:57:10,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-12-21 21:57:10,180 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:57:10,180 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:57:10,395 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-21 21:57:10,396 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:57:10,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:57:10,397 INFO L82 PathProgramCache]: Analyzing trace with hash -152540452, now seen corresponding path program 1 times [2020-12-21 21:57:10,398 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:57:10,398 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130906112] [2020-12-21 21:57:10,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:57:10,420 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 21:57:10,420 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2044648958] [2020-12-21 21:57:10,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-12-21 21:57:10,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:57:10,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-21 21:57:10,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:57:10,660 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2020-12-21 21:57:10,661 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130906112] [2020-12-21 21:57:10,661 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 21:57:10,661 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2044648958] [2020-12-21 21:57:10,661 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 21:57:10,662 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-12-21 21:57:10,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372183682] [2020-12-21 21:57:10,662 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-21 21:57:10,663 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:57:10,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-21 21:57:10,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-21 21:57:10,664 INFO L87 Difference]: Start difference. First operand 59 states and 66 transitions. Second operand 9 states. [2020-12-21 21:57:10,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:57:10,702 INFO L93 Difference]: Finished difference Result 106 states and 120 transitions. [2020-12-21 21:57:10,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-21 21:57:10,703 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 58 [2020-12-21 21:57:10,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:57:10,703 INFO L225 Difference]: With dead ends: 106 [2020-12-21 21:57:10,703 INFO L226 Difference]: Without dead ends: 62 [2020-12-21 21:57:10,704 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-21 21:57:10,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-12-21 21:57:10,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2020-12-21 21:57:10,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-12-21 21:57:10,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 68 transitions. [2020-12-21 21:57:10,708 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 68 transitions. Word has length 58 [2020-12-21 21:57:10,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:57:10,709 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 68 transitions. [2020-12-21 21:57:10,709 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-21 21:57:10,709 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 68 transitions. [2020-12-21 21:57:10,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-12-21 21:57:10,710 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:57:10,710 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:57:10,924 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-21 21:57:10,925 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:57:10,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:57:10,926 INFO L82 PathProgramCache]: Analyzing trace with hash -1155589794, now seen corresponding path program 2 times [2020-12-21 21:57:10,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:57:10,927 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699418434] [2020-12-21 21:57:10,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:57:10,942 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 21:57:10,942 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1578966124] [2020-12-21 21:57:10,943 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 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 [2020-12-21 21:57:11,035 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 21:57:11,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:57:11,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-21 21:57:11,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:57:11,192 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2020-12-21 21:57:11,193 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699418434] [2020-12-21 21:57:11,193 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 21:57:11,194 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578966124] [2020-12-21 21:57:11,194 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 21:57:11,194 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-12-21 21:57:11,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025660626] [2020-12-21 21:57:11,195 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-21 21:57:11,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:57:11,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-21 21:57:11,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-21 21:57:11,196 INFO L87 Difference]: Start difference. First operand 61 states and 68 transitions. Second operand 10 states. [2020-12-21 21:57:11,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:57:11,249 INFO L93 Difference]: Finished difference Result 108 states and 122 transitions. [2020-12-21 21:57:11,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-21 21:57:11,249 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 60 [2020-12-21 21:57:11,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:57:11,250 INFO L225 Difference]: With dead ends: 108 [2020-12-21 21:57:11,250 INFO L226 Difference]: Without dead ends: 64 [2020-12-21 21:57:11,256 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-21 21:57:11,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-12-21 21:57:11,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2020-12-21 21:57:11,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-12-21 21:57:11,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 70 transitions. [2020-12-21 21:57:11,266 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 70 transitions. Word has length 60 [2020-12-21 21:57:11,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:57:11,266 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 70 transitions. [2020-12-21 21:57:11,266 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-21 21:57:11,267 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 70 transitions. [2020-12-21 21:57:11,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-12-21 21:57:11,267 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:57:11,267 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:57:11,480 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-12-21 21:57:11,481 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:57:11,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:57:11,482 INFO L82 PathProgramCache]: Analyzing trace with hash 1281634144, now seen corresponding path program 3 times [2020-12-21 21:57:11,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:57:11,483 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804327197] [2020-12-21 21:57:11,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:57:11,513 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 21:57:11,514 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2061116481] [2020-12-21 21:57:11,514 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 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 [2020-12-21 21:57:11,611 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-21 21:57:11,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:57:11,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-21 21:57:11,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:57:11,673 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-12-21 21:57:11,673 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804327197] [2020-12-21 21:57:11,674 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 21:57:11,674 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2061116481] [2020-12-21 21:57:11,674 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 21:57:11,674 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-12-21 21:57:11,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688194756] [2020-12-21 21:57:11,675 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-21 21:57:11,675 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:57:11,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-21 21:57:11,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-21 21:57:11,676 INFO L87 Difference]: Start difference. First operand 63 states and 70 transitions. Second operand 4 states. [2020-12-21 21:57:11,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:57:11,698 INFO L93 Difference]: Finished difference Result 82 states and 91 transitions. [2020-12-21 21:57:11,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-21 21:57:11,699 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 62 [2020-12-21 21:57:11,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:57:11,700 INFO L225 Difference]: With dead ends: 82 [2020-12-21 21:57:11,700 INFO L226 Difference]: Without dead ends: 66 [2020-12-21 21:57:11,701 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-21 21:57:11,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-12-21 21:57:11,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2020-12-21 21:57:11,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-12-21 21:57:11,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 72 transitions. [2020-12-21 21:57:11,708 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 72 transitions. Word has length 62 [2020-12-21 21:57:11,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:57:11,709 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 72 transitions. [2020-12-21 21:57:11,709 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-21 21:57:11,709 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 72 transitions. [2020-12-21 21:57:11,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-21 21:57:11,710 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:57:11,710 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:57:11,924 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:57:11,925 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:57:11,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:57:11,926 INFO L82 PathProgramCache]: Analyzing trace with hash 377274978, now seen corresponding path program 4 times [2020-12-21 21:57:11,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:57:11,927 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326562018] [2020-12-21 21:57:11,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:57:11,960 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 21:57:11,961 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [792501254] [2020-12-21 21:57:11,961 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 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 [2020-12-21 21:57:12,056 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 21:57:12,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:57:12,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-21 21:57:12,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:57:12,155 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2020-12-21 21:57:12,155 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326562018] [2020-12-21 21:57:12,155 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 21:57:12,155 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [792501254] [2020-12-21 21:57:12,156 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 21:57:12,156 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-12-21 21:57:12,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140949250] [2020-12-21 21:57:12,157 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-21 21:57:12,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:57:12,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-21 21:57:12,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-21 21:57:12,158 INFO L87 Difference]: Start difference. First operand 65 states and 72 transitions. Second operand 5 states. [2020-12-21 21:57:12,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:57:12,260 INFO L93 Difference]: Finished difference Result 117 states and 133 transitions. [2020-12-21 21:57:12,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-21 21:57:12,262 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 64 [2020-12-21 21:57:12,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:57:12,263 INFO L225 Difference]: With dead ends: 117 [2020-12-21 21:57:12,263 INFO L226 Difference]: Without dead ends: 77 [2020-12-21 21:57:12,264 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-21 21:57:12,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-12-21 21:57:12,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 74. [2020-12-21 21:57:12,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-12-21 21:57:12,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 81 transitions. [2020-12-21 21:57:12,273 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 81 transitions. Word has length 64 [2020-12-21 21:57:12,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:57:12,275 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 81 transitions. [2020-12-21 21:57:12,277 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-21 21:57:12,277 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 81 transitions. [2020-12-21 21:57:12,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-12-21 21:57:12,279 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:57:12,280 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:57:12,493 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-21 21:57:12,494 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:57:12,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:57:12,495 INFO L82 PathProgramCache]: Analyzing trace with hash -790114983, now seen corresponding path program 5 times [2020-12-21 21:57:12,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:57:12,496 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658723461] [2020-12-21 21:57:12,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:57:12,516 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 21:57:12,516 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [377429493] [2020-12-21 21:57:12,517 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 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 [2020-12-21 21:57:12,678 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-12-21 21:57:12,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:57:12,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-21 21:57:12,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:57:12,790 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2020-12-21 21:57:12,791 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658723461] [2020-12-21 21:57:12,791 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 21:57:12,792 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [377429493] [2020-12-21 21:57:12,793 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 21:57:12,793 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-12-21 21:57:12,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79035138] [2020-12-21 21:57:12,795 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-21 21:57:12,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:57:12,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-21 21:57:12,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-21 21:57:12,796 INFO L87 Difference]: Start difference. First operand 74 states and 81 transitions. Second operand 6 states. [2020-12-21 21:57:12,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:57:12,922 INFO L93 Difference]: Finished difference Result 132 states and 148 transitions. [2020-12-21 21:57:12,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-21 21:57:12,923 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 73 [2020-12-21 21:57:12,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:57:12,925 INFO L225 Difference]: With dead ends: 132 [2020-12-21 21:57:12,925 INFO L226 Difference]: Without dead ends: 86 [2020-12-21 21:57:12,926 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-21 21:57:12,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-12-21 21:57:12,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 83. [2020-12-21 21:57:12,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-12-21 21:57:12,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 90 transitions. [2020-12-21 21:57:12,934 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 90 transitions. Word has length 73 [2020-12-21 21:57:12,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:57:12,934 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 90 transitions. [2020-12-21 21:57:12,934 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-21 21:57:12,934 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 90 transitions. [2020-12-21 21:57:12,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-12-21 21:57:12,935 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:57:12,935 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 5, 5, 5, 5, 5, 5, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:57:13,148 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-21 21:57:13,149 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:57:13,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:57:13,151 INFO L82 PathProgramCache]: Analyzing trace with hash 426299330, now seen corresponding path program 6 times [2020-12-21 21:57:13,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:57:13,151 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032020635] [2020-12-21 21:57:13,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:57:13,177 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 21:57:13,178 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1329498398] [2020-12-21 21:57:13,178 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 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 [2020-12-21 21:57:13,594 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-12-21 21:57:13,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:57:13,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-21 21:57:13,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:57:13,721 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2020-12-21 21:57:13,722 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032020635] [2020-12-21 21:57:13,722 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 21:57:13,722 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1329498398] [2020-12-21 21:57:13,723 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 21:57:13,723 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-12-21 21:57:13,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702096012] [2020-12-21 21:57:13,724 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-21 21:57:13,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:57:13,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-21 21:57:13,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-21 21:57:13,725 INFO L87 Difference]: Start difference. First operand 83 states and 90 transitions. Second operand 5 states. [2020-12-21 21:57:13,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:57:13,752 INFO L93 Difference]: Finished difference Result 108 states and 117 transitions. [2020-12-21 21:57:13,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-21 21:57:13,753 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 82 [2020-12-21 21:57:13,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:57:13,754 INFO L225 Difference]: With dead ends: 108 [2020-12-21 21:57:13,754 INFO L226 Difference]: Without dead ends: 86 [2020-12-21 21:57:13,755 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-21 21:57:13,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-12-21 21:57:13,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2020-12-21 21:57:13,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-12-21 21:57:13,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 92 transitions. [2020-12-21 21:57:13,761 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 92 transitions. Word has length 82 [2020-12-21 21:57:13,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:57:13,761 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 92 transitions. [2020-12-21 21:57:13,761 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-21 21:57:13,761 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 92 transitions. [2020-12-21 21:57:13,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-12-21 21:57:13,763 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:57:13,763 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:57:13,976 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:57:13,977 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:57:13,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:57:13,977 INFO L82 PathProgramCache]: Analyzing trace with hash -105690940, now seen corresponding path program 7 times [2020-12-21 21:57:13,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:57:13,978 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049520262] [2020-12-21 21:57:13,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:57:13,994 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 21:57:13,995 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [479610374] [2020-12-21 21:57:13,995 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-21 21:57:14,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:57:14,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-21 21:57:14,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:57:14,272 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2020-12-21 21:57:14,273 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049520262] [2020-12-21 21:57:14,273 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 21:57:14,273 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [479610374] [2020-12-21 21:57:14,274 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 21:57:14,274 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-12-21 21:57:14,274 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248378147] [2020-12-21 21:57:14,275 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-21 21:57:14,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:57:14,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-21 21:57:14,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-21 21:57:14,276 INFO L87 Difference]: Start difference. First operand 85 states and 92 transitions. Second operand 11 states. [2020-12-21 21:57:14,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:57:14,329 INFO L93 Difference]: Finished difference Result 154 states and 168 transitions. [2020-12-21 21:57:14,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-21 21:57:14,330 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 84 [2020-12-21 21:57:14,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:57:14,331 INFO L225 Difference]: With dead ends: 154 [2020-12-21 21:57:14,331 INFO L226 Difference]: Without dead ends: 88 [2020-12-21 21:57:14,331 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-21 21:57:14,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-12-21 21:57:14,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 87. [2020-12-21 21:57:14,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-12-21 21:57:14,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 94 transitions. [2020-12-21 21:57:14,337 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 94 transitions. Word has length 84 [2020-12-21 21:57:14,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:57:14,337 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 94 transitions. [2020-12-21 21:57:14,338 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-21 21:57:14,338 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 94 transitions. [2020-12-21 21:57:14,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-12-21 21:57:14,338 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:57:14,339 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:57:14,550 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:57:14,551 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:57:14,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:57:14,552 INFO L82 PathProgramCache]: Analyzing trace with hash 2063005894, now seen corresponding path program 8 times [2020-12-21 21:57:14,552 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:57:14,553 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389318096] [2020-12-21 21:57:14,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:57:14,573 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 21:57:14,574 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [172085901] [2020-12-21 21:57:14,574 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-21 21:57:14,678 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 21:57:14,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:57:14,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-21 21:57:14,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:57:14,900 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2020-12-21 21:57:14,901 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389318096] [2020-12-21 21:57:14,901 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 21:57:14,901 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [172085901] [2020-12-21 21:57:14,902 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 21:57:14,902 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-12-21 21:57:14,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344572089] [2020-12-21 21:57:14,903 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-21 21:57:14,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:57:14,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-21 21:57:14,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-21 21:57:14,904 INFO L87 Difference]: Start difference. First operand 87 states and 94 transitions. Second operand 12 states. [2020-12-21 21:57:14,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:57:14,965 INFO L93 Difference]: Finished difference Result 156 states and 170 transitions. [2020-12-21 21:57:14,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-21 21:57:14,966 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 86 [2020-12-21 21:57:14,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:57:14,967 INFO L225 Difference]: With dead ends: 156 [2020-12-21 21:57:14,967 INFO L226 Difference]: Without dead ends: 90 [2020-12-21 21:57:14,968 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-21 21:57:14,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-12-21 21:57:14,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 89. [2020-12-21 21:57:14,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-12-21 21:57:14,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 96 transitions. [2020-12-21 21:57:14,975 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 96 transitions. Word has length 86 [2020-12-21 21:57:14,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:57:14,975 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 96 transitions. [2020-12-21 21:57:14,975 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-21 21:57:14,976 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 96 transitions. [2020-12-21 21:57:14,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-12-21 21:57:14,977 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:57:14,977 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:57:15,192 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:57:15,193 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:57:15,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:57:15,195 INFO L82 PathProgramCache]: Analyzing trace with hash -1173442488, now seen corresponding path program 9 times [2020-12-21 21:57:15,195 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:57:15,196 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348083940] [2020-12-21 21:57:15,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:57:15,214 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 21:57:15,215 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [880622104] [2020-12-21 21:57:15,215 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 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 [2020-12-21 21:57:15,708 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-21 21:57:15,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:57:15,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-21 21:57:15,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:57:15,814 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 194 trivial. 0 not checked. [2020-12-21 21:57:15,815 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348083940] [2020-12-21 21:57:15,815 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 21:57:15,815 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [880622104] [2020-12-21 21:57:15,815 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 21:57:15,815 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-12-21 21:57:15,816 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903230077] [2020-12-21 21:57:15,816 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-21 21:57:15,816 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:57:15,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-21 21:57:15,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-21 21:57:15,817 INFO L87 Difference]: Start difference. First operand 89 states and 96 transitions. Second operand 5 states. [2020-12-21 21:57:15,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:57:15,919 INFO L93 Difference]: Finished difference Result 153 states and 173 transitions. [2020-12-21 21:57:15,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-21 21:57:15,919 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 88 [2020-12-21 21:57:15,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:57:15,921 INFO L225 Difference]: With dead ends: 153 [2020-12-21 21:57:15,921 INFO L226 Difference]: Without dead ends: 104 [2020-12-21 21:57:15,922 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-21 21:57:15,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-12-21 21:57:15,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 98. [2020-12-21 21:57:15,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-12-21 21:57:15,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 108 transitions. [2020-12-21 21:57:15,929 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 108 transitions. Word has length 88 [2020-12-21 21:57:15,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:57:15,929 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 108 transitions. [2020-12-21 21:57:15,929 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-21 21:57:15,929 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 108 transitions. [2020-12-21 21:57:15,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-12-21 21:57:15,930 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:57:15,930 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 6, 6, 6, 6, 6, 6, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:57:16,145 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-12-21 21:57:16,146 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:57:16,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:57:16,147 INFO L82 PathProgramCache]: Analyzing trace with hash -1409703947, now seen corresponding path program 10 times [2020-12-21 21:57:16,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:57:16,148 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385148868] [2020-12-21 21:57:16,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:57:16,170 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 21:57:16,174 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [993584137] [2020-12-21 21:57:16,175 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 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 [2020-12-21 21:57:16,274 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 21:57:16,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:57:16,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-21 21:57:16,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:57:16,526 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2020-12-21 21:57:16,526 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385148868] [2020-12-21 21:57:16,527 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 21:57:16,527 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [993584137] [2020-12-21 21:57:16,529 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 21:57:16,530 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-12-21 21:57:16,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929653933] [2020-12-21 21:57:16,531 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-21 21:57:16,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:57:16,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-21 21:57:16,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-12-21 21:57:16,533 INFO L87 Difference]: Start difference. First operand 98 states and 108 transitions. Second operand 13 states. [2020-12-21 21:57:16,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:57:16,593 INFO L93 Difference]: Finished difference Result 176 states and 196 transitions. [2020-12-21 21:57:16,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-21 21:57:16,593 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 97 [2020-12-21 21:57:16,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:57:16,595 INFO L225 Difference]: With dead ends: 176 [2020-12-21 21:57:16,595 INFO L226 Difference]: Without dead ends: 101 [2020-12-21 21:57:16,596 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-12-21 21:57:16,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-12-21 21:57:16,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 100. [2020-12-21 21:57:16,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-12-21 21:57:16,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 110 transitions. [2020-12-21 21:57:16,604 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 110 transitions. Word has length 97 [2020-12-21 21:57:16,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:57:16,604 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 110 transitions. [2020-12-21 21:57:16,604 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-21 21:57:16,604 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 110 transitions. [2020-12-21 21:57:16,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-12-21 21:57:16,605 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:57:16,606 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 6, 6, 6, 6, 6, 6, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:57:16,819 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-12-21 21:57:16,820 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:57:16,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:57:16,821 INFO L82 PathProgramCache]: Analyzing trace with hash -839941325, now seen corresponding path program 11 times [2020-12-21 21:57:16,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:57:16,821 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651126906] [2020-12-21 21:57:16,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:57:16,839 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 21:57:16,840 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2071629560] [2020-12-21 21:57:16,840 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 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 [2020-12-21 21:57:17,064 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-12-21 21:57:17,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:57:17,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-21 21:57:17,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:57:17,197 INFO L134 CoverageAnalysis]: Checked inductivity of 283 backedges. 23 proven. 26 refuted. 0 times theorem prover too weak. 234 trivial. 0 not checked. [2020-12-21 21:57:17,197 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651126906] [2020-12-21 21:57:17,197 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 21:57:17,197 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2071629560] [2020-12-21 21:57:17,197 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 21:57:17,198 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-12-21 21:57:17,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384566189] [2020-12-21 21:57:17,198 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-21 21:57:17,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:57:17,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-21 21:57:17,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-21 21:57:17,199 INFO L87 Difference]: Start difference. First operand 100 states and 110 transitions. Second operand 7 states. [2020-12-21 21:57:17,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:57:17,323 INFO L93 Difference]: Finished difference Result 175 states and 197 transitions. [2020-12-21 21:57:17,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-21 21:57:17,324 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 99 [2020-12-21 21:57:17,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:57:17,325 INFO L225 Difference]: With dead ends: 175 [2020-12-21 21:57:17,325 INFO L226 Difference]: Without dead ends: 112 [2020-12-21 21:57:17,326 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-21 21:57:17,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-12-21 21:57:17,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 109. [2020-12-21 21:57:17,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-12-21 21:57:17,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 119 transitions. [2020-12-21 21:57:17,332 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 119 transitions. Word has length 99 [2020-12-21 21:57:17,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:57:17,332 INFO L481 AbstractCegarLoop]: Abstraction has 109 states and 119 transitions. [2020-12-21 21:57:17,332 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-21 21:57:17,332 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 119 transitions. [2020-12-21 21:57:17,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-12-21 21:57:17,334 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:57:17,334 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 7, 7, 7, 7, 7, 7, 5, 5, 5, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:57:17,548 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:57:17,549 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:57:17,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:57:17,550 INFO L82 PathProgramCache]: Analyzing trace with hash 1344803056, now seen corresponding path program 12 times [2020-12-21 21:57:17,550 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:57:17,551 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754592420] [2020-12-21 21:57:17,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:57:17,568 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 21:57:17,568 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1611501226] [2020-12-21 21:57:17,568 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 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 [2020-12-21 21:57:17,916 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-12-21 21:57:17,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:57:17,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-21 21:57:17,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:57:18,067 INFO L134 CoverageAnalysis]: Checked inductivity of 340 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 331 trivial. 0 not checked. [2020-12-21 21:57:18,067 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754592420] [2020-12-21 21:57:18,067 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 21:57:18,067 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1611501226] [2020-12-21 21:57:18,068 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 21:57:18,068 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-12-21 21:57:18,068 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091346312] [2020-12-21 21:57:18,068 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-21 21:57:18,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:57:18,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-21 21:57:18,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-21 21:57:18,070 INFO L87 Difference]: Start difference. First operand 109 states and 119 transitions. Second operand 6 states. [2020-12-21 21:57:18,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:57:18,102 INFO L93 Difference]: Finished difference Result 140 states and 153 transitions. [2020-12-21 21:57:18,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-21 21:57:18,102 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 108 [2020-12-21 21:57:18,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:57:18,104 INFO L225 Difference]: With dead ends: 140 [2020-12-21 21:57:18,104 INFO L226 Difference]: Without dead ends: 112 [2020-12-21 21:57:18,104 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-21 21:57:18,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-12-21 21:57:18,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 111. [2020-12-21 21:57:18,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-12-21 21:57:18,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 121 transitions. [2020-12-21 21:57:18,111 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 121 transitions. Word has length 108 [2020-12-21 21:57:18,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:57:18,111 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 121 transitions. [2020-12-21 21:57:18,112 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-21 21:57:18,112 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 121 transitions. [2020-12-21 21:57:18,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-12-21 21:57:18,113 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:57:18,114 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 7, 7, 7, 7, 7, 7, 5, 5, 5, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:57:18,328 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-12-21 21:57:18,329 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:57:18,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:57:18,330 INFO L82 PathProgramCache]: Analyzing trace with hash 2042426738, now seen corresponding path program 13 times [2020-12-21 21:57:18,330 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:57:18,330 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443390506] [2020-12-21 21:57:18,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:57:18,348 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 21:57:18,348 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1898526586] [2020-12-21 21:57:18,348 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 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 [2020-12-21 21:57:18,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:57:18,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-21 21:57:18,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:57:18,680 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 226 trivial. 0 not checked. [2020-12-21 21:57:18,680 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443390506] [2020-12-21 21:57:18,681 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 21:57:18,681 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1898526586] [2020-12-21 21:57:18,681 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 21:57:18,681 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-12-21 21:57:18,681 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640714093] [2020-12-21 21:57:18,682 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-21 21:57:18,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:57:18,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-21 21:57:18,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-12-21 21:57:18,683 INFO L87 Difference]: Start difference. First operand 111 states and 121 transitions. Second operand 14 states. [2020-12-21 21:57:18,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:57:18,742 INFO L93 Difference]: Finished difference Result 200 states and 220 transitions. [2020-12-21 21:57:18,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-21 21:57:18,743 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 110 [2020-12-21 21:57:18,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:57:18,744 INFO L225 Difference]: With dead ends: 200 [2020-12-21 21:57:18,744 INFO L226 Difference]: Without dead ends: 114 [2020-12-21 21:57:18,745 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-12-21 21:57:18,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-12-21 21:57:18,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 113. [2020-12-21 21:57:18,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-12-21 21:57:18,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 123 transitions. [2020-12-21 21:57:18,752 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 123 transitions. Word has length 110 [2020-12-21 21:57:18,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:57:18,752 INFO L481 AbstractCegarLoop]: Abstraction has 113 states and 123 transitions. [2020-12-21 21:57:18,753 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-21 21:57:18,753 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 123 transitions. [2020-12-21 21:57:18,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-12-21 21:57:18,754 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:57:18,754 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 7, 7, 7, 7, 7, 7, 5, 5, 5, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:57:18,967 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:57:18,968 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:57:18,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:57:18,969 INFO L82 PathProgramCache]: Analyzing trace with hash 1265026804, now seen corresponding path program 14 times [2020-12-21 21:57:18,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:57:18,970 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14658706] [2020-12-21 21:57:18,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:57:18,990 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 21:57:18,990 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1458720434] [2020-12-21 21:57:18,990 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 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 [2020-12-21 21:57:19,113 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 21:57:19,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:57:19,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-21 21:57:19,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:57:19,442 INFO L134 CoverageAnalysis]: Checked inductivity of 370 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 226 trivial. 0 not checked. [2020-12-21 21:57:19,442 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14658706] [2020-12-21 21:57:19,442 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 21:57:19,442 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1458720434] [2020-12-21 21:57:19,443 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 21:57:19,443 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-12-21 21:57:19,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59782059] [2020-12-21 21:57:19,443 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-21 21:57:19,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:57:19,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-21 21:57:19,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-12-21 21:57:19,445 INFO L87 Difference]: Start difference. First operand 113 states and 123 transitions. Second operand 15 states. [2020-12-21 21:57:19,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:57:19,515 INFO L93 Difference]: Finished difference Result 202 states and 222 transitions. [2020-12-21 21:57:19,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-21 21:57:19,516 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 112 [2020-12-21 21:57:19,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:57:19,517 INFO L225 Difference]: With dead ends: 202 [2020-12-21 21:57:19,517 INFO L226 Difference]: Without dead ends: 116 [2020-12-21 21:57:19,518 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-12-21 21:57:19,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-12-21 21:57:19,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 115. [2020-12-21 21:57:19,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-12-21 21:57:19,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 125 transitions. [2020-12-21 21:57:19,526 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 125 transitions. Word has length 112 [2020-12-21 21:57:19,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:57:19,526 INFO L481 AbstractCegarLoop]: Abstraction has 115 states and 125 transitions. [2020-12-21 21:57:19,526 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-21 21:57:19,526 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 125 transitions. [2020-12-21 21:57:19,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-12-21 21:57:19,528 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:57:19,528 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 7, 7, 7, 7, 7, 7, 5, 5, 5, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:57:19,743 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-12-21 21:57:19,744 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:57:19,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:57:19,745 INFO L82 PathProgramCache]: Analyzing trace with hash 1507999734, now seen corresponding path program 15 times [2020-12-21 21:57:19,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:57:19,746 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383393357] [2020-12-21 21:57:19,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:57:19,768 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 21:57:19,768 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [863022666] [2020-12-21 21:57:19,769 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 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 [2020-12-21 21:57:20,332 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-12-21 21:57:20,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:57:20,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-21 21:57:20,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:57:20,455 INFO L134 CoverageAnalysis]: Checked inductivity of 395 backedges. 37 proven. 7 refuted. 0 times theorem prover too weak. 351 trivial. 0 not checked. [2020-12-21 21:57:20,455 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383393357] [2020-12-21 21:57:20,455 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 21:57:20,455 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [863022666] [2020-12-21 21:57:20,456 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 21:57:20,456 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-12-21 21:57:20,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159326931] [2020-12-21 21:57:20,456 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-21 21:57:20,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:57:20,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-21 21:57:20,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-21 21:57:20,458 INFO L87 Difference]: Start difference. First operand 115 states and 125 transitions. Second operand 6 states. [2020-12-21 21:57:20,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:57:20,589 INFO L93 Difference]: Finished difference Result 193 states and 218 transitions. [2020-12-21 21:57:20,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-21 21:57:20,590 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 114 [2020-12-21 21:57:20,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:57:20,591 INFO L225 Difference]: With dead ends: 193 [2020-12-21 21:57:20,592 INFO L226 Difference]: Without dead ends: 130 [2020-12-21 21:57:20,592 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-21 21:57:20,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-12-21 21:57:20,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 124. [2020-12-21 21:57:20,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-12-21 21:57:20,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 137 transitions. [2020-12-21 21:57:20,600 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 137 transitions. Word has length 114 [2020-12-21 21:57:20,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:57:20,600 INFO L481 AbstractCegarLoop]: Abstraction has 124 states and 137 transitions. [2020-12-21 21:57:20,600 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-21 21:57:20,601 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 137 transitions. [2020-12-21 21:57:20,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2020-12-21 21:57:20,602 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:57:20,602 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 8, 8, 8, 8, 8, 8, 5, 5, 5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:57:20,817 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-12-21 21:57:20,818 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:57:20,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:57:20,819 INFO L82 PathProgramCache]: Analyzing trace with hash 631086347, now seen corresponding path program 16 times [2020-12-21 21:57:20,819 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:57:20,819 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431824846] [2020-12-21 21:57:20,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:57:20,836 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 21:57:20,837 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [293280313] [2020-12-21 21:57:20,837 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 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 [2020-12-21 21:57:20,966 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 21:57:20,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:57:20,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-21 21:57:20,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:57:21,176 INFO L134 CoverageAnalysis]: Checked inductivity of 461 backedges. 45 proven. 40 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2020-12-21 21:57:21,177 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431824846] [2020-12-21 21:57:21,177 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 21:57:21,177 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [293280313] [2020-12-21 21:57:21,178 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 21:57:21,178 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-12-21 21:57:21,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211388373] [2020-12-21 21:57:21,178 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-21 21:57:21,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:57:21,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-21 21:57:21,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-21 21:57:21,180 INFO L87 Difference]: Start difference. First operand 124 states and 137 transitions. Second operand 9 states. [2020-12-21 21:57:21,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:57:21,396 INFO L93 Difference]: Finished difference Result 226 states and 268 transitions. [2020-12-21 21:57:21,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-21 21:57:21,396 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 123 [2020-12-21 21:57:21,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:57:21,398 INFO L225 Difference]: With dead ends: 226 [2020-12-21 21:57:21,398 INFO L226 Difference]: Without dead ends: 157 [2020-12-21 21:57:21,399 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-21 21:57:21,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2020-12-21 21:57:21,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 151. [2020-12-21 21:57:21,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2020-12-21 21:57:21,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 173 transitions. [2020-12-21 21:57:21,407 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 173 transitions. Word has length 123 [2020-12-21 21:57:21,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:57:21,407 INFO L481 AbstractCegarLoop]: Abstraction has 151 states and 173 transitions. [2020-12-21 21:57:21,407 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-21 21:57:21,407 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 173 transitions. [2020-12-21 21:57:21,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2020-12-21 21:57:21,409 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:57:21,409 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 11, 11, 11, 11, 11, 11, 6, 6, 6, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:57:21,622 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-12-21 21:57:21,623 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:57:21,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:57:21,624 INFO L82 PathProgramCache]: Analyzing trace with hash -466148810, now seen corresponding path program 17 times [2020-12-21 21:57:21,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:57:21,624 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838614488] [2020-12-21 21:57:21,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:57:21,644 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 21:57:21,645 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1765013865] [2020-12-21 21:57:21,645 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-21 21:57:21,969 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2020-12-21 21:57:21,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:57:21,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-21 21:57:21,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:57:22,141 INFO L134 CoverageAnalysis]: Checked inductivity of 713 backedges. 96 proven. 40 refuted. 0 times theorem prover too weak. 577 trivial. 0 not checked. [2020-12-21 21:57:22,141 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838614488] [2020-12-21 21:57:22,142 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 21:57:22,142 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1765013865] [2020-12-21 21:57:22,142 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 21:57:22,142 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-12-21 21:57:22,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267517616] [2020-12-21 21:57:22,143 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-21 21:57:22,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:57:22,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-21 21:57:22,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-21 21:57:22,144 INFO L87 Difference]: Start difference. First operand 151 states and 173 transitions. Second operand 8 states. [2020-12-21 21:57:22,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:57:22,267 INFO L93 Difference]: Finished difference Result 270 states and 316 transitions. [2020-12-21 21:57:22,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-21 21:57:22,267 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 150 [2020-12-21 21:57:22,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:57:22,268 INFO L225 Difference]: With dead ends: 270 [2020-12-21 21:57:22,269 INFO L226 Difference]: Without dead ends: 163 [2020-12-21 21:57:22,269 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-21 21:57:22,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-12-21 21:57:22,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 160. [2020-12-21 21:57:22,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-12-21 21:57:22,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 182 transitions. [2020-12-21 21:57:22,277 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 182 transitions. Word has length 150 [2020-12-21 21:57:22,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:57:22,278 INFO L481 AbstractCegarLoop]: Abstraction has 160 states and 182 transitions. [2020-12-21 21:57:22,278 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-21 21:57:22,278 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 182 transitions. [2020-12-21 21:57:22,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2020-12-21 21:57:22,280 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:57:22,280 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 12, 12, 6, 6, 6, 6, 6, 6, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:57:22,491 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:57:22,492 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:57:22,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:57:22,493 INFO L82 PathProgramCache]: Analyzing trace with hash -755311091, now seen corresponding path program 18 times [2020-12-21 21:57:22,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:57:22,493 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516070368] [2020-12-21 21:57:22,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:57:22,516 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 21:57:22,516 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1028754158] [2020-12-21 21:57:22,517 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 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 [2020-12-21 21:57:22,951 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-12-21 21:57:22,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:57:22,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-21 21:57:22,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:57:23,162 INFO L134 CoverageAnalysis]: Checked inductivity of 815 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 799 trivial. 0 not checked. [2020-12-21 21:57:23,162 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516070368] [2020-12-21 21:57:23,163 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 21:57:23,163 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1028754158] [2020-12-21 21:57:23,163 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 21:57:23,163 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-12-21 21:57:23,163 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060880310] [2020-12-21 21:57:23,164 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-21 21:57:23,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:57:23,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-21 21:57:23,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-21 21:57:23,165 INFO L87 Difference]: Start difference. First operand 160 states and 182 transitions. Second operand 7 states. [2020-12-21 21:57:23,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:57:23,207 INFO L93 Difference]: Finished difference Result 206 states and 235 transitions. [2020-12-21 21:57:23,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-21 21:57:23,207 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 159 [2020-12-21 21:57:23,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:57:23,209 INFO L225 Difference]: With dead ends: 206 [2020-12-21 21:57:23,209 INFO L226 Difference]: Without dead ends: 163 [2020-12-21 21:57:23,210 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-21 21:57:23,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-12-21 21:57:23,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 162. [2020-12-21 21:57:23,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-12-21 21:57:23,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 184 transitions. [2020-12-21 21:57:23,220 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 184 transitions. Word has length 159 [2020-12-21 21:57:23,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:57:23,220 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 184 transitions. [2020-12-21 21:57:23,221 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-21 21:57:23,221 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 184 transitions. [2020-12-21 21:57:23,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2020-12-21 21:57:23,222 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:57:23,222 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 12, 12, 6, 6, 6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:57:23,436 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2020-12-21 21:57:23,437 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:57:23,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:57:23,438 INFO L82 PathProgramCache]: Analyzing trace with hash -902385397, now seen corresponding path program 19 times [2020-12-21 21:57:23,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:57:23,439 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573170628] [2020-12-21 21:57:23,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:57:23,460 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 21:57:23,460 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1514934153] [2020-12-21 21:57:23,460 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 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 [2020-12-21 21:57:23,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:57:23,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 435 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-21 21:57:23,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:57:23,940 INFO L134 CoverageAnalysis]: Checked inductivity of 824 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 655 trivial. 0 not checked. [2020-12-21 21:57:23,941 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573170628] [2020-12-21 21:57:23,941 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 21:57:23,942 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1514934153] [2020-12-21 21:57:23,942 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 21:57:23,942 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-12-21 21:57:23,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482682432] [2020-12-21 21:57:23,943 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-21 21:57:23,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:57:23,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-21 21:57:23,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-12-21 21:57:23,944 INFO L87 Difference]: Start difference. First operand 162 states and 184 transitions. Second operand 16 states. [2020-12-21 21:57:24,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:57:24,015 INFO L93 Difference]: Finished difference Result 298 states and 342 transitions. [2020-12-21 21:57:24,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-21 21:57:24,016 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 161 [2020-12-21 21:57:24,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:57:24,017 INFO L225 Difference]: With dead ends: 298 [2020-12-21 21:57:24,017 INFO L226 Difference]: Without dead ends: 165 [2020-12-21 21:57:24,018 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-12-21 21:57:24,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-12-21 21:57:24,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 164. [2020-12-21 21:57:24,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-12-21 21:57:24,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 186 transitions. [2020-12-21 21:57:24,025 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 186 transitions. Word has length 161 [2020-12-21 21:57:24,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:57:24,025 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 186 transitions. [2020-12-21 21:57:24,025 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-21 21:57:24,025 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 186 transitions. [2020-12-21 21:57:24,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2020-12-21 21:57:24,026 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:57:24,026 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 12, 12, 12, 12, 12, 12, 6, 6, 6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:57:24,241 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:57:24,241 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:57:24,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:57:24,242 INFO L82 PathProgramCache]: Analyzing trace with hash 1609802825, now seen corresponding path program 20 times [2020-12-21 21:57:24,243 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:57:24,243 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719678024] [2020-12-21 21:57:24,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:57:24,263 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 21:57:24,263 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1158051102] [2020-12-21 21:57:24,263 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 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 [2020-12-21 21:57:24,415 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 21:57:24,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:57:24,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 441 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-21 21:57:24,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:57:24,775 INFO L134 CoverageAnalysis]: Checked inductivity of 851 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 655 trivial. 0 not checked. [2020-12-21 21:57:24,776 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719678024] [2020-12-21 21:57:24,776 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 21:57:24,776 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158051102] [2020-12-21 21:57:24,776 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 21:57:24,776 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-12-21 21:57:24,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309027642] [2020-12-21 21:57:24,777 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-21 21:57:24,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:57:24,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-21 21:57:24,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-12-21 21:57:24,778 INFO L87 Difference]: Start difference. First operand 164 states and 186 transitions. Second operand 17 states. [2020-12-21 21:57:24,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:57:24,859 INFO L93 Difference]: Finished difference Result 300 states and 344 transitions. [2020-12-21 21:57:24,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-21 21:57:24,859 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 163 [2020-12-21 21:57:24,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:57:24,861 INFO L225 Difference]: With dead ends: 300 [2020-12-21 21:57:24,861 INFO L226 Difference]: Without dead ends: 167 [2020-12-21 21:57:24,862 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-12-21 21:57:24,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-12-21 21:57:24,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 166. [2020-12-21 21:57:24,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-12-21 21:57:24,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 188 transitions. [2020-12-21 21:57:24,870 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 188 transitions. Word has length 163 [2020-12-21 21:57:24,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:57:24,871 INFO L481 AbstractCegarLoop]: Abstraction has 166 states and 188 transitions. [2020-12-21 21:57:24,871 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-21 21:57:24,871 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 188 transitions. [2020-12-21 21:57:24,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2020-12-21 21:57:24,872 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:57:24,873 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 12, 12, 12, 12, 12, 12, 6, 6, 6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:57:25,088 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2020-12-21 21:57:25,089 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:57:25,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:57:25,090 INFO L82 PathProgramCache]: Analyzing trace with hash 2051063815, now seen corresponding path program 21 times [2020-12-21 21:57:25,091 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:57:25,091 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986559824] [2020-12-21 21:57:25,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:57:25,110 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 21:57:25,111 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2090886358] [2020-12-21 21:57:25,111 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 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 [2020-12-21 21:57:25,398 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-12-21 21:57:25,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:57:25,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-21 21:57:25,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:57:25,589 INFO L134 CoverageAnalysis]: Checked inductivity of 880 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 855 trivial. 0 not checked. [2020-12-21 21:57:25,590 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986559824] [2020-12-21 21:57:25,590 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 21:57:25,590 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2090886358] [2020-12-21 21:57:25,591 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 21:57:25,591 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-12-21 21:57:25,591 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520530383] [2020-12-21 21:57:25,592 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-21 21:57:25,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:57:25,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-21 21:57:25,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-21 21:57:25,593 INFO L87 Difference]: Start difference. First operand 166 states and 188 transitions. Second operand 8 states. [2020-12-21 21:57:25,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:57:25,635 INFO L93 Difference]: Finished difference Result 212 states and 241 transitions. [2020-12-21 21:57:25,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-21 21:57:25,636 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 165 [2020-12-21 21:57:25,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:57:25,638 INFO L225 Difference]: With dead ends: 212 [2020-12-21 21:57:25,638 INFO L226 Difference]: Without dead ends: 169 [2020-12-21 21:57:25,639 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-21 21:57:25,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2020-12-21 21:57:25,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 168. [2020-12-21 21:57:25,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2020-12-21 21:57:25,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 190 transitions. [2020-12-21 21:57:25,647 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 190 transitions. Word has length 165 [2020-12-21 21:57:25,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:57:25,647 INFO L481 AbstractCegarLoop]: Abstraction has 168 states and 190 transitions. [2020-12-21 21:57:25,647 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-21 21:57:25,647 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 190 transitions. [2020-12-21 21:57:25,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2020-12-21 21:57:25,649 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:57:25,649 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 12, 12, 12, 12, 12, 12, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:57:25,863 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-12-21 21:57:25,864 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:57:25,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:57:25,865 INFO L82 PathProgramCache]: Analyzing trace with hash -1215562619, now seen corresponding path program 22 times [2020-12-21 21:57:25,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:57:25,866 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769343212] [2020-12-21 21:57:25,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:57:25,885 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 21:57:25,885 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1501016720] [2020-12-21 21:57:25,885 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 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 [2020-12-21 21:57:26,021 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 21:57:26,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:57:26,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-21 21:57:26,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:57:26,345 INFO L134 CoverageAnalysis]: Checked inductivity of 891 backedges. 53 proven. 155 refuted. 0 times theorem prover too weak. 683 trivial. 0 not checked. [2020-12-21 21:57:26,345 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769343212] [2020-12-21 21:57:26,346 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 21:57:26,346 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1501016720] [2020-12-21 21:57:26,346 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 21:57:26,347 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-12-21 21:57:26,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203692824] [2020-12-21 21:57:26,347 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-21 21:57:26,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:57:26,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-21 21:57:26,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-12-21 21:57:26,348 INFO L87 Difference]: Start difference. First operand 168 states and 190 transitions. Second operand 14 states. [2020-12-21 21:57:26,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:57:26,772 INFO L93 Difference]: Finished difference Result 316 states and 385 transitions. [2020-12-21 21:57:26,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-21 21:57:26,773 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 167 [2020-12-21 21:57:26,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:57:26,775 INFO L225 Difference]: With dead ends: 316 [2020-12-21 21:57:26,775 INFO L226 Difference]: Without dead ends: 219 [2020-12-21 21:57:26,776 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-12-21 21:57:26,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2020-12-21 21:57:26,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 213. [2020-12-21 21:57:26,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 213 states. [2020-12-21 21:57:26,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 250 transitions. [2020-12-21 21:57:26,788 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 250 transitions. Word has length 167 [2020-12-21 21:57:26,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:57:26,789 INFO L481 AbstractCegarLoop]: Abstraction has 213 states and 250 transitions. [2020-12-21 21:57:26,789 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-21 21:57:26,789 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 250 transitions. [2020-12-21 21:57:26,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2020-12-21 21:57:26,790 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:57:26,791 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 15, 15, 11, 11, 11, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:57:27,005 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2020-12-21 21:57:27,006 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:57:27,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:57:27,007 INFO L82 PathProgramCache]: Analyzing trace with hash 1651850840, now seen corresponding path program 23 times [2020-12-21 21:57:27,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:57:27,007 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572340514] [2020-12-21 21:57:27,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:57:27,033 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 21:57:27,033 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1567895548] [2020-12-21 21:57:27,033 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 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 [2020-12-21 21:57:28,117 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2020-12-21 21:57:28,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:57:28,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 571 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-21 21:57:28,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:57:28,399 INFO L134 CoverageAnalysis]: Checked inductivity of 1536 backedges. 213 proven. 57 refuted. 0 times theorem prover too weak. 1266 trivial. 0 not checked. [2020-12-21 21:57:28,400 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572340514] [2020-12-21 21:57:28,400 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 21:57:28,400 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567895548] [2020-12-21 21:57:28,400 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 21:57:28,400 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-12-21 21:57:28,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989444147] [2020-12-21 21:57:28,401 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-21 21:57:28,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:57:28,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-21 21:57:28,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-21 21:57:28,403 INFO L87 Difference]: Start difference. First operand 213 states and 250 transitions. Second operand 9 states. [2020-12-21 21:57:28,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:57:28,567 INFO L93 Difference]: Finished difference Result 387 states and 463 transitions. [2020-12-21 21:57:28,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-21 21:57:28,567 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 212 [2020-12-21 21:57:28,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:57:28,569 INFO L225 Difference]: With dead ends: 387 [2020-12-21 21:57:28,569 INFO L226 Difference]: Without dead ends: 225 [2020-12-21 21:57:28,569 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 204 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-21 21:57:28,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2020-12-21 21:57:28,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 222. [2020-12-21 21:57:28,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 222 states. [2020-12-21 21:57:28,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 259 transitions. [2020-12-21 21:57:28,578 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 259 transitions. Word has length 212 [2020-12-21 21:57:28,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:57:28,579 INFO L481 AbstractCegarLoop]: Abstraction has 222 states and 259 transitions. [2020-12-21 21:57:28,579 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-21 21:57:28,579 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 259 transitions. [2020-12-21 21:57:28,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2020-12-21 21:57:28,580 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:57:28,580 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 15, 15, 11, 11, 11, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:57:28,794 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-12-21 21:57:28,795 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:57:28,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:57:28,796 INFO L82 PathProgramCache]: Analyzing trace with hash 20245667, now seen corresponding path program 24 times [2020-12-21 21:57:28,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:57:28,797 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622877394] [2020-12-21 21:57:28,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:57:28,821 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 21:57:28,822 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2096906086] [2020-12-21 21:57:28,822 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-21 21:57:29,808 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-12-21 21:57:29,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:57:29,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 427 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-21 21:57:29,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:57:30,092 INFO L134 CoverageAnalysis]: Checked inductivity of 1692 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1656 trivial. 0 not checked. [2020-12-21 21:57:30,092 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622877394] [2020-12-21 21:57:30,093 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 21:57:30,093 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2096906086] [2020-12-21 21:57:30,093 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 21:57:30,093 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-12-21 21:57:30,093 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022627958] [2020-12-21 21:57:30,094 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-21 21:57:30,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:57:30,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-21 21:57:30,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-21 21:57:30,095 INFO L87 Difference]: Start difference. First operand 222 states and 259 transitions. Second operand 9 states. [2020-12-21 21:57:30,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:57:30,142 INFO L93 Difference]: Finished difference Result 286 states and 335 transitions. [2020-12-21 21:57:30,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-21 21:57:30,143 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 221 [2020-12-21 21:57:30,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:57:30,145 INFO L225 Difference]: With dead ends: 286 [2020-12-21 21:57:30,145 INFO L226 Difference]: Without dead ends: 225 [2020-12-21 21:57:30,146 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 213 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-21 21:57:30,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2020-12-21 21:57:30,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 224. [2020-12-21 21:57:30,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 224 states. [2020-12-21 21:57:30,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 261 transitions. [2020-12-21 21:57:30,156 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 261 transitions. Word has length 221 [2020-12-21 21:57:30,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:57:30,157 INFO L481 AbstractCegarLoop]: Abstraction has 224 states and 261 transitions. [2020-12-21 21:57:30,157 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-21 21:57:30,157 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 261 transitions. [2020-12-21 21:57:30,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2020-12-21 21:57:30,159 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:57:30,159 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 15, 15, 11, 11, 11, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:57:30,373 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-12-21 21:57:30,374 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:57:30,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:57:30,375 INFO L82 PathProgramCache]: Analyzing trace with hash 2073585185, now seen corresponding path program 25 times [2020-12-21 21:57:30,375 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:57:30,375 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888765451] [2020-12-21 21:57:30,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:57:30,399 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 21:57:30,400 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1603309596] [2020-12-21 21:57:30,400 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 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 [2020-12-21 21:57:30,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:57:30,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 587 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-21 21:57:30,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:57:30,958 INFO L134 CoverageAnalysis]: Checked inductivity of 1705 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 1480 trivial. 0 not checked. [2020-12-21 21:57:30,959 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888765451] [2020-12-21 21:57:30,959 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 21:57:30,959 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1603309596] [2020-12-21 21:57:30,959 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 21:57:30,959 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-12-21 21:57:30,960 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093331658] [2020-12-21 21:57:30,960 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-21 21:57:30,960 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:57:30,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-21 21:57:30,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-12-21 21:57:30,961 INFO L87 Difference]: Start difference. First operand 224 states and 261 transitions. Second operand 18 states. [2020-12-21 21:57:31,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:57:31,049 INFO L93 Difference]: Finished difference Result 418 states and 492 transitions. [2020-12-21 21:57:31,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-21 21:57:31,054 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 223 [2020-12-21 21:57:31,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:57:31,056 INFO L225 Difference]: With dead ends: 418 [2020-12-21 21:57:31,056 INFO L226 Difference]: Without dead ends: 227 [2020-12-21 21:57:31,057 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 206 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-12-21 21:57:31,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2020-12-21 21:57:31,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 226. [2020-12-21 21:57:31,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 226 states. [2020-12-21 21:57:31,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 263 transitions. [2020-12-21 21:57:31,086 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 263 transitions. Word has length 223 [2020-12-21 21:57:31,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:57:31,086 INFO L481 AbstractCegarLoop]: Abstraction has 226 states and 263 transitions. [2020-12-21 21:57:31,086 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-21 21:57:31,086 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 263 transitions. [2020-12-21 21:57:31,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2020-12-21 21:57:31,088 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:57:31,088 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 16, 16, 11, 11, 11, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:57:31,301 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-12-21 21:57:31,302 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:57:31,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:57:31,303 INFO L82 PathProgramCache]: Analyzing trace with hash -1482678049, now seen corresponding path program 26 times [2020-12-21 21:57:31,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:57:31,303 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104796986] [2020-12-21 21:57:31,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:57:31,325 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 21:57:31,325 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [828576874] [2020-12-21 21:57:31,325 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 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 [2020-12-21 21:57:31,516 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 21:57:31,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:57:31,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 593 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-21 21:57:31,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:57:31,985 INFO L134 CoverageAnalysis]: Checked inductivity of 1736 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 1480 trivial. 0 not checked. [2020-12-21 21:57:31,985 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104796986] [2020-12-21 21:57:31,986 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 21:57:31,986 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [828576874] [2020-12-21 21:57:31,986 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 21:57:31,986 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-12-21 21:57:31,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7192222] [2020-12-21 21:57:31,987 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-21 21:57:31,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:57:31,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-21 21:57:31,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-12-21 21:57:31,989 INFO L87 Difference]: Start difference. First operand 226 states and 263 transitions. Second operand 19 states. [2020-12-21 21:57:32,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:57:32,072 INFO L93 Difference]: Finished difference Result 420 states and 494 transitions. [2020-12-21 21:57:32,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-21 21:57:32,072 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 225 [2020-12-21 21:57:32,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:57:32,074 INFO L225 Difference]: With dead ends: 420 [2020-12-21 21:57:32,075 INFO L226 Difference]: Without dead ends: 229 [2020-12-21 21:57:32,076 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 207 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-12-21 21:57:32,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2020-12-21 21:57:32,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 228. [2020-12-21 21:57:32,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 228 states. [2020-12-21 21:57:32,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 265 transitions. [2020-12-21 21:57:32,088 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 265 transitions. Word has length 225 [2020-12-21 21:57:32,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:57:32,089 INFO L481 AbstractCegarLoop]: Abstraction has 228 states and 265 transitions. [2020-12-21 21:57:32,089 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-21 21:57:32,089 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 265 transitions. [2020-12-21 21:57:32,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2020-12-21 21:57:32,091 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:57:32,091 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 17, 17, 11, 11, 11, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:57:32,304 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-12-21 21:57:32,305 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:57:32,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:57:32,305 INFO L82 PathProgramCache]: Analyzing trace with hash -257678307, now seen corresponding path program 27 times [2020-12-21 21:57:32,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:57:32,305 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474109634] [2020-12-21 21:57:32,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:57:32,330 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 21:57:32,330 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [253638519] [2020-12-21 21:57:32,331 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 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 [2020-12-21 21:57:33,040 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-12-21 21:57:33,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:57:33,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-21 21:57:33,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:57:33,330 INFO L134 CoverageAnalysis]: Checked inductivity of 1769 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 1720 trivial. 0 not checked. [2020-12-21 21:57:33,330 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474109634] [2020-12-21 21:57:33,330 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 21:57:33,331 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [253638519] [2020-12-21 21:57:33,331 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 21:57:33,331 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-12-21 21:57:33,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150997551] [2020-12-21 21:57:33,331 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-21 21:57:33,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:57:33,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-21 21:57:33,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-21 21:57:33,333 INFO L87 Difference]: Start difference. First operand 228 states and 265 transitions. Second operand 10 states. [2020-12-21 21:57:33,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:57:33,382 INFO L93 Difference]: Finished difference Result 292 states and 341 transitions. [2020-12-21 21:57:33,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-21 21:57:33,383 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 227 [2020-12-21 21:57:33,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:57:33,385 INFO L225 Difference]: With dead ends: 292 [2020-12-21 21:57:33,386 INFO L226 Difference]: Without dead ends: 231 [2020-12-21 21:57:33,386 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 218 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-21 21:57:33,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2020-12-21 21:57:33,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 230. [2020-12-21 21:57:33,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 230 states. [2020-12-21 21:57:33,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 267 transitions. [2020-12-21 21:57:33,397 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 267 transitions. Word has length 227 [2020-12-21 21:57:33,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:57:33,397 INFO L481 AbstractCegarLoop]: Abstraction has 230 states and 267 transitions. [2020-12-21 21:57:33,397 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-21 21:57:33,397 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 267 transitions. [2020-12-21 21:57:33,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2020-12-21 21:57:33,399 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:57:33,399 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 17, 17, 11, 11, 11, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:57:33,614 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-12-21 21:57:33,615 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:57:33,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:57:33,616 INFO L82 PathProgramCache]: Analyzing trace with hash 1276618523, now seen corresponding path program 28 times [2020-12-21 21:57:33,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:57:33,617 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288446103] [2020-12-21 21:57:33,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:57:33,637 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 21:57:33,637 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [564808741] [2020-12-21 21:57:33,637 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 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 [2020-12-21 21:57:33,807 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 21:57:33,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:57:33,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 603 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-21 21:57:33,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:57:34,070 INFO L134 CoverageAnalysis]: Checked inductivity of 1784 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 1720 trivial. 0 not checked. [2020-12-21 21:57:34,071 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288446103] [2020-12-21 21:57:34,071 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 21:57:34,071 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564808741] [2020-12-21 21:57:34,071 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 21:57:34,071 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-12-21 21:57:34,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25146494] [2020-12-21 21:57:34,072 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-21 21:57:34,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:57:34,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-21 21:57:34,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-21 21:57:34,072 INFO L87 Difference]: Start difference. First operand 230 states and 267 transitions. Second operand 11 states. [2020-12-21 21:57:34,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:57:34,118 INFO L93 Difference]: Finished difference Result 294 states and 343 transitions. [2020-12-21 21:57:34,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-21 21:57:34,119 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 229 [2020-12-21 21:57:34,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:57:34,120 INFO L225 Difference]: With dead ends: 294 [2020-12-21 21:57:34,120 INFO L226 Difference]: Without dead ends: 233 [2020-12-21 21:57:34,121 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 219 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-21 21:57:34,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-12-21 21:57:34,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 232. [2020-12-21 21:57:34,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232 states. [2020-12-21 21:57:34,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 269 transitions. [2020-12-21 21:57:34,129 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 269 transitions. Word has length 229 [2020-12-21 21:57:34,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:57:34,129 INFO L481 AbstractCegarLoop]: Abstraction has 232 states and 269 transitions. [2020-12-21 21:57:34,129 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-21 21:57:34,129 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 269 transitions. [2020-12-21 21:57:34,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2020-12-21 21:57:34,131 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:57:34,131 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 17, 17, 11, 11, 11, 9, 9, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:57:34,344 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:57:34,344 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:57:34,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:57:34,345 INFO L82 PathProgramCache]: Analyzing trace with hash -1732877671, now seen corresponding path program 29 times [2020-12-21 21:57:34,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:57:34,345 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785066079] [2020-12-21 21:57:34,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:57:34,367 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 21:57:34,367 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2115168624] [2020-12-21 21:57:34,368 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 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 [2020-12-21 21:57:35,647 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2020-12-21 21:57:35,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:57:35,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 607 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-21 21:57:35,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:57:35,919 INFO L134 CoverageAnalysis]: Checked inductivity of 1801 backedges. 245 proven. 77 refuted. 0 times theorem prover too weak. 1479 trivial. 0 not checked. [2020-12-21 21:57:35,919 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785066079] [2020-12-21 21:57:35,919 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 21:57:35,919 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2115168624] [2020-12-21 21:57:35,920 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 21:57:35,920 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-12-21 21:57:35,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132859911] [2020-12-21 21:57:35,920 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-21 21:57:35,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:57:35,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-21 21:57:35,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-21 21:57:35,921 INFO L87 Difference]: Start difference. First operand 232 states and 269 transitions. Second operand 10 states. [2020-12-21 21:57:36,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:57:36,102 INFO L93 Difference]: Finished difference Result 418 states and 494 transitions. [2020-12-21 21:57:36,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-21 21:57:36,103 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 231 [2020-12-21 21:57:36,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:57:36,104 INFO L225 Difference]: With dead ends: 418 [2020-12-21 21:57:36,104 INFO L226 Difference]: Without dead ends: 244 [2020-12-21 21:57:36,105 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 222 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-21 21:57:36,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2020-12-21 21:57:36,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 241. [2020-12-21 21:57:36,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 241 states. [2020-12-21 21:57:36,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 278 transitions. [2020-12-21 21:57:36,113 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 278 transitions. Word has length 231 [2020-12-21 21:57:36,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:57:36,113 INFO L481 AbstractCegarLoop]: Abstraction has 241 states and 278 transitions. [2020-12-21 21:57:36,113 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-21 21:57:36,114 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 278 transitions. [2020-12-21 21:57:36,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2020-12-21 21:57:36,115 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:57:36,115 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 17, 17, 11, 11, 11, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:57:36,328 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:57:36,329 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:57:36,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:57:36,329 INFO L82 PathProgramCache]: Analyzing trace with hash -106153150, now seen corresponding path program 30 times [2020-12-21 21:57:36,330 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:57:36,330 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282110596] [2020-12-21 21:57:36,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:57:36,350 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 21:57:36,350 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [925343350] [2020-12-21 21:57:36,350 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 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 [2020-12-21 21:57:39,972 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2020-12-21 21:57:39,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:57:39,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 589 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-21 21:57:39,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:57:40,298 INFO L134 CoverageAnalysis]: Checked inductivity of 1966 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 1885 trivial. 0 not checked. [2020-12-21 21:57:40,299 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282110596] [2020-12-21 21:57:40,299 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 21:57:40,299 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925343350] [2020-12-21 21:57:40,299 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 21:57:40,299 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-12-21 21:57:40,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939248716] [2020-12-21 21:57:40,300 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-21 21:57:40,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:57:40,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-21 21:57:40,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-21 21:57:40,301 INFO L87 Difference]: Start difference. First operand 241 states and 278 transitions. Second operand 12 states. [2020-12-21 21:57:40,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:57:40,343 INFO L93 Difference]: Finished difference Result 308 states and 357 transitions. [2020-12-21 21:57:40,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-21 21:57:40,344 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 240 [2020-12-21 21:57:40,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:57:40,346 INFO L225 Difference]: With dead ends: 308 [2020-12-21 21:57:40,346 INFO L226 Difference]: Without dead ends: 244 [2020-12-21 21:57:40,346 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 229 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-21 21:57:40,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2020-12-21 21:57:40,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 243. [2020-12-21 21:57:40,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 243 states. [2020-12-21 21:57:40,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 280 transitions. [2020-12-21 21:57:40,354 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 280 transitions. Word has length 240 [2020-12-21 21:57:40,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:57:40,355 INFO L481 AbstractCegarLoop]: Abstraction has 243 states and 280 transitions. [2020-12-21 21:57:40,355 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-21 21:57:40,355 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 280 transitions. [2020-12-21 21:57:40,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2020-12-21 21:57:40,356 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:57:40,356 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 17, 17, 11, 11, 11, 10, 10, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:57:40,569 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2020-12-21 21:57:40,570 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:57:40,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:57:40,580 INFO L82 PathProgramCache]: Analyzing trace with hash -1904049724, now seen corresponding path program 31 times [2020-12-21 21:57:40,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:57:40,581 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754880015] [2020-12-21 21:57:40,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:57:40,600 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 21:57:40,600 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1922552257] [2020-12-21 21:57:40,600 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 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 [2020-12-21 21:57:40,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:57:40,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 623 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-21 21:57:40,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:57:41,200 INFO L134 CoverageAnalysis]: Checked inductivity of 1985 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 1696 trivial. 0 not checked. [2020-12-21 21:57:41,200 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754880015] [2020-12-21 21:57:41,200 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 21:57:41,200 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1922552257] [2020-12-21 21:57:41,200 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 21:57:41,200 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-12-21 21:57:41,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583116617] [2020-12-21 21:57:41,201 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-21 21:57:41,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:57:41,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-21 21:57:41,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-12-21 21:57:41,202 INFO L87 Difference]: Start difference. First operand 243 states and 280 transitions. Second operand 20 states. [2020-12-21 21:57:41,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:57:41,282 INFO L93 Difference]: Finished difference Result 452 states and 526 transitions. [2020-12-21 21:57:41,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-21 21:57:41,282 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 242 [2020-12-21 21:57:41,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:57:41,284 INFO L225 Difference]: With dead ends: 452 [2020-12-21 21:57:41,284 INFO L226 Difference]: Without dead ends: 246 [2020-12-21 21:57:41,285 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 223 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-12-21 21:57:41,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2020-12-21 21:57:41,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 245. [2020-12-21 21:57:41,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 245 states. [2020-12-21 21:57:41,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 282 transitions. [2020-12-21 21:57:41,293 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 282 transitions. Word has length 242 [2020-12-21 21:57:41,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:57:41,293 INFO L481 AbstractCegarLoop]: Abstraction has 245 states and 282 transitions. [2020-12-21 21:57:41,293 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-21 21:57:41,293 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 282 transitions. [2020-12-21 21:57:41,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2020-12-21 21:57:41,294 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:57:41,295 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 18, 18, 11, 11, 11, 10, 10, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:57:41,509 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:57:41,510 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:57:41,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:57:41,510 INFO L82 PathProgramCache]: Analyzing trace with hash 1056547398, now seen corresponding path program 32 times [2020-12-21 21:57:41,511 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:57:41,511 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182370560] [2020-12-21 21:57:41,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:57:41,530 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 21:57:41,530 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2111973696] [2020-12-21 21:57:41,530 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 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 [2020-12-21 21:57:41,716 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 21:57:41,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:57:41,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 629 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-21 21:57:41,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:57:42,179 INFO L134 CoverageAnalysis]: Checked inductivity of 2020 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 1696 trivial. 0 not checked. [2020-12-21 21:57:42,179 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182370560] [2020-12-21 21:57:42,179 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 21:57:42,179 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2111973696] [2020-12-21 21:57:42,179 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 21:57:42,179 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-12-21 21:57:42,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099388897] [2020-12-21 21:57:42,180 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-21 21:57:42,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:57:42,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-21 21:57:42,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-12-21 21:57:42,181 INFO L87 Difference]: Start difference. First operand 245 states and 282 transitions. Second operand 21 states. [2020-12-21 21:57:42,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:57:42,270 INFO L93 Difference]: Finished difference Result 454 states and 528 transitions. [2020-12-21 21:57:42,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-21 21:57:42,271 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 244 [2020-12-21 21:57:42,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:57:42,272 INFO L225 Difference]: With dead ends: 454 [2020-12-21 21:57:42,272 INFO L226 Difference]: Without dead ends: 248 [2020-12-21 21:57:42,273 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 224 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-12-21 21:57:42,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2020-12-21 21:57:42,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 247. [2020-12-21 21:57:42,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 247 states. [2020-12-21 21:57:42,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 284 transitions. [2020-12-21 21:57:42,282 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 284 transitions. Word has length 244 [2020-12-21 21:57:42,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:57:42,283 INFO L481 AbstractCegarLoop]: Abstraction has 247 states and 284 transitions. [2020-12-21 21:57:42,283 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-21 21:57:42,283 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 284 transitions. [2020-12-21 21:57:42,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2020-12-21 21:57:42,284 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:57:42,284 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 19, 19, 11, 11, 11, 10, 10, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:57:42,497 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:57:42,498 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:57:42,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:57:42,499 INFO L82 PathProgramCache]: Analyzing trace with hash -1372935608, now seen corresponding path program 33 times [2020-12-21 21:57:42,499 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:57:42,499 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061238981] [2020-12-21 21:57:42,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:57:42,524 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 21:57:42,525 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1899099771] [2020-12-21 21:57:42,525 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 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 [2020-12-21 21:57:43,502 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2020-12-21 21:57:43,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:57:43,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 425 conjuncts, 23 conjunts are in the unsatisfiable core [2020-12-21 21:57:43,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:57:43,798 INFO L134 CoverageAnalysis]: Checked inductivity of 2057 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 1957 trivial. 0 not checked. [2020-12-21 21:57:43,798 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061238981] [2020-12-21 21:57:43,799 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 21:57:43,799 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1899099771] [2020-12-21 21:57:43,799 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 21:57:43,799 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-12-21 21:57:43,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382179192] [2020-12-21 21:57:43,800 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-21 21:57:43,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:57:43,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-21 21:57:43,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-12-21 21:57:43,801 INFO L87 Difference]: Start difference. First operand 247 states and 284 transitions. Second operand 13 states. [2020-12-21 21:57:43,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:57:43,849 INFO L93 Difference]: Finished difference Result 314 states and 363 transitions. [2020-12-21 21:57:43,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-21 21:57:43,850 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 246 [2020-12-21 21:57:43,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:57:43,852 INFO L225 Difference]: With dead ends: 314 [2020-12-21 21:57:43,852 INFO L226 Difference]: Without dead ends: 250 [2020-12-21 21:57:43,852 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 234 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-12-21 21:57:43,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2020-12-21 21:57:43,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 249. [2020-12-21 21:57:43,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 249 states. [2020-12-21 21:57:43,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 286 transitions. [2020-12-21 21:57:43,863 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 286 transitions. Word has length 246 [2020-12-21 21:57:43,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:57:43,863 INFO L481 AbstractCegarLoop]: Abstraction has 249 states and 286 transitions. [2020-12-21 21:57:43,864 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-21 21:57:43,864 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 286 transitions. [2020-12-21 21:57:43,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2020-12-21 21:57:43,865 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:57:43,865 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 19, 19, 11, 11, 11, 11, 11, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:57:44,078 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2020-12-21 21:57:44,079 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:57:44,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:57:44,079 INFO L82 PathProgramCache]: Analyzing trace with hash 488720202, now seen corresponding path program 34 times [2020-12-21 21:57:44,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:57:44,080 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937314092] [2020-12-21 21:57:44,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:57:44,101 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 21:57:44,101 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [652101638] [2020-12-21 21:57:44,102 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 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 [2020-12-21 21:57:44,259 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 21:57:44,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:57:44,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 639 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-21 21:57:44,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:57:44,626 INFO L134 CoverageAnalysis]: Checked inductivity of 2078 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 1957 trivial. 0 not checked. [2020-12-21 21:57:44,626 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937314092] [2020-12-21 21:57:44,626 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 21:57:44,626 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [652101638] [2020-12-21 21:57:44,626 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 21:57:44,626 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-12-21 21:57:44,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107579085] [2020-12-21 21:57:44,627 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-21 21:57:44,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:57:44,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-21 21:57:44,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-12-21 21:57:44,628 INFO L87 Difference]: Start difference. First operand 249 states and 286 transitions. Second operand 14 states. [2020-12-21 21:57:44,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:57:44,681 INFO L93 Difference]: Finished difference Result 316 states and 365 transitions. [2020-12-21 21:57:44,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-21 21:57:44,682 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 248 [2020-12-21 21:57:44,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:57:44,683 INFO L225 Difference]: With dead ends: 316 [2020-12-21 21:57:44,684 INFO L226 Difference]: Without dead ends: 252 [2020-12-21 21:57:44,684 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 235 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-12-21 21:57:44,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2020-12-21 21:57:44,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 251. [2020-12-21 21:57:44,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 251 states. [2020-12-21 21:57:44,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 288 transitions. [2020-12-21 21:57:44,692 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 288 transitions. Word has length 248 [2020-12-21 21:57:44,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:57:44,693 INFO L481 AbstractCegarLoop]: Abstraction has 251 states and 288 transitions. [2020-12-21 21:57:44,693 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-21 21:57:44,693 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 288 transitions. [2020-12-21 21:57:44,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2020-12-21 21:57:44,694 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:57:44,694 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 19, 19, 12, 12, 11, 11, 11, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:57:44,908 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2020-12-21 21:57:44,909 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:57:44,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:57:44,910 INFO L82 PathProgramCache]: Analyzing trace with hash -1461408820, now seen corresponding path program 35 times [2020-12-21 21:57:44,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:57:44,910 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074484812] [2020-12-21 21:57:44,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:57:44,929 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 21:57:44,930 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1579887679] [2020-12-21 21:57:44,930 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 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 [2020-12-21 21:58:08,553 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2020-12-21 21:58:08,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:58:08,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 643 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-21 21:58:08,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:58:08,879 INFO L134 CoverageAnalysis]: Checked inductivity of 2101 backedges. 277 proven. 100 refuted. 0 times theorem prover too weak. 1724 trivial. 0 not checked. [2020-12-21 21:58:08,880 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074484812] [2020-12-21 21:58:08,880 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 21:58:08,880 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1579887679] [2020-12-21 21:58:08,880 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 21:58:08,880 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-12-21 21:58:08,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905613727] [2020-12-21 21:58:08,881 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-21 21:58:08,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:58:08,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-21 21:58:08,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-21 21:58:08,882 INFO L87 Difference]: Start difference. First operand 251 states and 288 transitions. Second operand 11 states. [2020-12-21 21:58:09,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:58:09,042 INFO L93 Difference]: Finished difference Result 449 states and 525 transitions. [2020-12-21 21:58:09,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-21 21:58:09,043 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 250 [2020-12-21 21:58:09,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:58:09,045 INFO L225 Difference]: With dead ends: 449 [2020-12-21 21:58:09,045 INFO L226 Difference]: Without dead ends: 263 [2020-12-21 21:58:09,045 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 240 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-21 21:58:09,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2020-12-21 21:58:09,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 260. [2020-12-21 21:58:09,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 260 states. [2020-12-21 21:58:09,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 297 transitions. [2020-12-21 21:58:09,054 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 297 transitions. Word has length 250 [2020-12-21 21:58:09,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:58:09,055 INFO L481 AbstractCegarLoop]: Abstraction has 260 states and 297 transitions. [2020-12-21 21:58:09,055 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-21 21:58:09,055 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 297 transitions. [2020-12-21 21:58:09,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2020-12-21 21:58:09,057 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:58:09,057 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 19, 19, 12, 12, 11, 11, 11, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:58:09,271 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2020-12-21 21:58:09,272 INFO L429 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:58:09,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:58:09,272 INFO L82 PathProgramCache]: Analyzing trace with hash -96172113, now seen corresponding path program 36 times [2020-12-21 21:58:09,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:58:09,273 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657934435] [2020-12-21 21:58:09,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:58:09,294 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 21:58:09,294 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [496088032] [2020-12-21 21:58:09,294 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 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 [2020-12-21 21:58:12,238 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2020-12-21 21:58:12,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:58:12,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 599 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-21 21:58:12,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:58:12,618 INFO L134 CoverageAnalysis]: Checked inductivity of 2275 backedges. 309 proven. 126 refuted. 0 times theorem prover too weak. 1840 trivial. 0 not checked. [2020-12-21 21:58:12,618 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657934435] [2020-12-21 21:58:12,618 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 21:58:12,618 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496088032] [2020-12-21 21:58:12,618 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 21:58:12,619 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-12-21 21:58:12,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949101702] [2020-12-21 21:58:12,619 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-21 21:58:12,619 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:58:12,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-21 21:58:12,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-21 21:58:12,620 INFO L87 Difference]: Start difference. First operand 260 states and 297 transitions. Second operand 12 states. [2020-12-21 21:58:12,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:58:12,786 INFO L93 Difference]: Finished difference Result 464 states and 540 transitions. [2020-12-21 21:58:12,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-21 21:58:12,787 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 259 [2020-12-21 21:58:12,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:58:12,789 INFO L225 Difference]: With dead ends: 464 [2020-12-21 21:58:12,789 INFO L226 Difference]: Without dead ends: 272 [2020-12-21 21:58:12,790 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 248 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-21 21:58:12,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2020-12-21 21:58:12,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 269. [2020-12-21 21:58:12,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 269 states. [2020-12-21 21:58:12,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 306 transitions. [2020-12-21 21:58:12,799 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 306 transitions. Word has length 259 [2020-12-21 21:58:12,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:58:12,799 INFO L481 AbstractCegarLoop]: Abstraction has 269 states and 306 transitions. [2020-12-21 21:58:12,799 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-21 21:58:12,799 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 306 transitions. [2020-12-21 21:58:12,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 269 [2020-12-21 21:58:12,801 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:58:12,801 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 19, 19, 12, 12, 11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:58:13,014 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:58:13,015 INFO L429 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:58:13,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:58:13,015 INFO L82 PathProgramCache]: Analyzing trace with hash 1562304684, now seen corresponding path program 37 times [2020-12-21 21:58:13,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:58:13,016 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138335113] [2020-12-21 21:58:13,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:58:13,033 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 21:58:13,033 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1729475901] [2020-12-21 21:58:13,034 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 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 [2020-12-21 21:58:13,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:58:13,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 667 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-21 21:58:13,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:58:13,711 INFO L134 CoverageAnalysis]: Checked inductivity of 2458 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 2097 trivial. 0 not checked. [2020-12-21 21:58:13,712 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138335113] [2020-12-21 21:58:13,712 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 21:58:13,712 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1729475901] [2020-12-21 21:58:13,712 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 21:58:13,712 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-12-21 21:58:13,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131237329] [2020-12-21 21:58:13,713 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-21 21:58:13,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:58:13,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-21 21:58:13,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-12-21 21:58:13,714 INFO L87 Difference]: Start difference. First operand 269 states and 306 transitions. Second operand 22 states. [2020-12-21 21:58:13,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:58:13,792 INFO L93 Difference]: Finished difference Result 500 states and 574 transitions. [2020-12-21 21:58:13,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-21 21:58:13,793 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 268 [2020-12-21 21:58:13,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:58:13,795 INFO L225 Difference]: With dead ends: 500 [2020-12-21 21:58:13,795 INFO L226 Difference]: Without dead ends: 272 [2020-12-21 21:58:13,796 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 247 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-12-21 21:58:13,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2020-12-21 21:58:13,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 271. [2020-12-21 21:58:13,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 271 states. [2020-12-21 21:58:13,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 308 transitions. [2020-12-21 21:58:13,806 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 308 transitions. Word has length 268 [2020-12-21 21:58:13,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:58:13,806 INFO L481 AbstractCegarLoop]: Abstraction has 271 states and 308 transitions. [2020-12-21 21:58:13,806 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-21 21:58:13,806 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 308 transitions. [2020-12-21 21:58:13,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 271 [2020-12-21 21:58:13,808 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:58:13,808 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 20, 20, 12, 12, 11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:58:14,021 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2020-12-21 21:58:14,021 INFO L429 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:58:14,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:58:14,022 INFO L82 PathProgramCache]: Analyzing trace with hash 337150638, now seen corresponding path program 38 times [2020-12-21 21:58:14,022 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:58:14,022 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257698450] [2020-12-21 21:58:14,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:58:14,042 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 21:58:14,043 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1282540495] [2020-12-21 21:58:14,043 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 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 [2020-12-21 21:58:14,210 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 21:58:14,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:58:14,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 673 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-21 21:58:14,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:58:14,696 INFO L134 CoverageAnalysis]: Checked inductivity of 2497 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 2097 trivial. 0 not checked. [2020-12-21 21:58:14,696 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257698450] [2020-12-21 21:58:14,696 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 21:58:14,696 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1282540495] [2020-12-21 21:58:14,696 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 21:58:14,696 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-12-21 21:58:14,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647048725] [2020-12-21 21:58:14,697 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-21 21:58:14,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:58:14,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-21 21:58:14,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-12-21 21:58:14,698 INFO L87 Difference]: Start difference. First operand 271 states and 308 transitions. Second operand 23 states. [2020-12-21 21:58:14,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:58:14,798 INFO L93 Difference]: Finished difference Result 502 states and 576 transitions. [2020-12-21 21:58:14,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-21 21:58:14,799 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 270 [2020-12-21 21:58:14,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:58:14,800 INFO L225 Difference]: With dead ends: 502 [2020-12-21 21:58:14,801 INFO L226 Difference]: Without dead ends: 274 [2020-12-21 21:58:14,801 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 248 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-12-21 21:58:14,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2020-12-21 21:58:14,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 273. [2020-12-21 21:58:14,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 273 states. [2020-12-21 21:58:14,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 310 transitions. [2020-12-21 21:58:14,810 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 310 transitions. Word has length 270 [2020-12-21 21:58:14,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:58:14,810 INFO L481 AbstractCegarLoop]: Abstraction has 273 states and 310 transitions. [2020-12-21 21:58:14,810 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-21 21:58:14,810 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 310 transitions. [2020-12-21 21:58:14,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 273 [2020-12-21 21:58:14,812 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:58:14,812 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 21, 21, 12, 12, 11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:58:15,026 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:58:15,027 INFO L429 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:58:15,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:58:15,028 INFO L82 PathProgramCache]: Analyzing trace with hash -214848464, now seen corresponding path program 39 times [2020-12-21 21:58:15,028 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:58:15,028 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656748144] [2020-12-21 21:58:15,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:58:15,047 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 21:58:15,048 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1011842476] [2020-12-21 21:58:15,048 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 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 [2020-12-21 21:58:16,419 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2020-12-21 21:58:16,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:58:16,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 481 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-21 21:58:16,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:58:16,804 INFO L134 CoverageAnalysis]: Checked inductivity of 2538 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 2394 trivial. 0 not checked. [2020-12-21 21:58:16,804 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656748144] [2020-12-21 21:58:16,804 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 21:58:16,804 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1011842476] [2020-12-21 21:58:16,804 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 21:58:16,804 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-12-21 21:58:16,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045222366] [2020-12-21 21:58:16,805 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-21 21:58:16,805 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:58:16,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-21 21:58:16,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-12-21 21:58:16,806 INFO L87 Difference]: Start difference. First operand 273 states and 310 transitions. Second operand 15 states. [2020-12-21 21:58:16,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:58:16,855 INFO L93 Difference]: Finished difference Result 346 states and 395 transitions. [2020-12-21 21:58:16,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-21 21:58:16,855 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 272 [2020-12-21 21:58:16,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:58:16,857 INFO L225 Difference]: With dead ends: 346 [2020-12-21 21:58:16,857 INFO L226 Difference]: Without dead ends: 276 [2020-12-21 21:58:16,857 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 258 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-12-21 21:58:16,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2020-12-21 21:58:16,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 275. [2020-12-21 21:58:16,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 275 states. [2020-12-21 21:58:16,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 312 transitions. [2020-12-21 21:58:16,865 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 312 transitions. Word has length 272 [2020-12-21 21:58:16,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:58:16,866 INFO L481 AbstractCegarLoop]: Abstraction has 275 states and 312 transitions. [2020-12-21 21:58:16,866 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-21 21:58:16,866 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 312 transitions. [2020-12-21 21:58:16,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 275 [2020-12-21 21:58:16,867 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:58:16,868 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 21, 21, 13, 13, 11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:58:17,074 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:58:17,075 INFO L429 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:58:17,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:58:17,076 INFO L82 PathProgramCache]: Analyzing trace with hash -1559173710, now seen corresponding path program 40 times [2020-12-21 21:58:17,076 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:58:17,077 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940058826] [2020-12-21 21:58:17,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:58:17,096 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 21:58:17,096 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1172587962] [2020-12-21 21:58:17,096 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 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 [2020-12-21 21:58:17,274 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 21:58:17,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:58:17,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 683 conjuncts, 23 conjunts are in the unsatisfiable core [2020-12-21 21:58:17,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:58:17,843 INFO L134 CoverageAnalysis]: Checked inductivity of 2563 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 2122 trivial. 0 not checked. [2020-12-21 21:58:17,843 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940058826] [2020-12-21 21:58:17,843 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 21:58:17,843 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172587962] [2020-12-21 21:58:17,843 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 21:58:17,844 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-12-21 21:58:17,844 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708733668] [2020-12-21 21:58:17,844 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-21 21:58:17,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:58:17,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-21 21:58:17,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2020-12-21 21:58:17,845 INFO L87 Difference]: Start difference. First operand 275 states and 312 transitions. Second operand 24 states. [2020-12-21 21:58:17,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:58:17,937 INFO L93 Difference]: Finished difference Result 508 states and 582 transitions. [2020-12-21 21:58:17,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-21 21:58:17,939 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 274 [2020-12-21 21:58:17,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:58:17,941 INFO L225 Difference]: With dead ends: 508 [2020-12-21 21:58:17,941 INFO L226 Difference]: Without dead ends: 278 [2020-12-21 21:58:17,942 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 251 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2020-12-21 21:58:17,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2020-12-21 21:58:17,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 277. [2020-12-21 21:58:17,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 277 states. [2020-12-21 21:58:17,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 314 transitions. [2020-12-21 21:58:17,950 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 314 transitions. Word has length 274 [2020-12-21 21:58:17,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:58:17,951 INFO L481 AbstractCegarLoop]: Abstraction has 277 states and 314 transitions. [2020-12-21 21:58:17,951 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-21 21:58:17,951 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 314 transitions. [2020-12-21 21:58:17,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 277 [2020-12-21 21:58:17,952 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:58:17,953 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 21, 21, 21, 21, 13, 13, 11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:58:18,168 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2020-12-21 21:58:18,169 INFO L429 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:58:18,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:58:18,169 INFO L82 PathProgramCache]: Analyzing trace with hash -1768587724, now seen corresponding path program 41 times [2020-12-21 21:58:18,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:58:18,170 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312803068] [2020-12-21 21:58:18,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:58:18,188 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 21:58:18,188 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [783215003] [2020-12-21 21:58:18,188 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 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 [2020-12-21 21:58:47,823 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 23 check-sat command(s) [2020-12-21 21:58:47,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:58:47,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 689 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-21 21:58:47,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:58:48,174 INFO L134 CoverageAnalysis]: Checked inductivity of 2606 backedges. 341 proven. 155 refuted. 0 times theorem prover too weak. 2110 trivial. 0 not checked. [2020-12-21 21:58:48,174 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312803068] [2020-12-21 21:58:48,174 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 21:58:48,174 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [783215003] [2020-12-21 21:58:48,174 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 21:58:48,175 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-12-21 21:58:48,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925919305] [2020-12-21 21:58:48,175 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-21 21:58:48,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:58:48,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-21 21:58:48,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-12-21 21:58:48,176 INFO L87 Difference]: Start difference. First operand 277 states and 314 transitions. Second operand 13 states. [2020-12-21 21:58:48,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:58:48,369 INFO L93 Difference]: Finished difference Result 489 states and 565 transitions. [2020-12-21 21:58:48,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-21 21:58:48,370 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 276 [2020-12-21 21:58:48,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:58:48,373 INFO L225 Difference]: With dead ends: 489 [2020-12-21 21:58:48,373 INFO L226 Difference]: Without dead ends: 289 [2020-12-21 21:58:48,374 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 264 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-12-21 21:58:48,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2020-12-21 21:58:48,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 286. [2020-12-21 21:58:48,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 286 states. [2020-12-21 21:58:48,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 323 transitions. [2020-12-21 21:58:48,384 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 323 transitions. Word has length 276 [2020-12-21 21:58:48,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:58:48,384 INFO L481 AbstractCegarLoop]: Abstraction has 286 states and 323 transitions. [2020-12-21 21:58:48,384 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-21 21:58:48,384 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 323 transitions. [2020-12-21 21:58:48,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 286 [2020-12-21 21:58:48,386 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:58:48,386 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 22, 22, 13, 13, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:58:48,587 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:58:48,587 INFO L429 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:58:48,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:58:48,588 INFO L82 PathProgramCache]: Analyzing trace with hash 855560071, now seen corresponding path program 42 times [2020-12-21 21:58:48,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:58:48,588 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339000226] [2020-12-21 21:58:48,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:58:48,606 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 21:58:48,606 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1575745047] [2020-12-21 21:58:48,606 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 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 [2020-12-21 21:58:55,738 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2020-12-21 21:58:55,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:58:55,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 679 conjuncts, 28 conjunts are in the unsatisfiable core [2020-12-21 21:58:55,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:58:56,147 INFO L134 CoverageAnalysis]: Checked inductivity of 2798 backedges. 415 proven. 229 refuted. 0 times theorem prover too weak. 2154 trivial. 0 not checked. [2020-12-21 21:58:56,147 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339000226] [2020-12-21 21:58:56,147 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 21:58:56,147 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1575745047] [2020-12-21 21:58:56,147 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 21:58:56,147 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-12-21 21:58:56,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357297384] [2020-12-21 21:58:56,148 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-21 21:58:56,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:58:56,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-21 21:58:56,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=149, Unknown=0, NotChecked=0, Total=272 [2020-12-21 21:58:56,149 INFO L87 Difference]: Start difference. First operand 286 states and 323 transitions. Second operand 17 states. [2020-12-21 21:58:56,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:58:56,468 INFO L93 Difference]: Finished difference Result 510 states and 589 transitions. [2020-12-21 21:58:56,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-21 21:58:56,468 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 285 [2020-12-21 21:58:56,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:58:56,471 INFO L225 Difference]: With dead ends: 510 [2020-12-21 21:58:56,471 INFO L226 Difference]: Without dead ends: 304 [2020-12-21 21:58:56,472 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 269 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=123, Invalid=149, Unknown=0, NotChecked=0, Total=272 [2020-12-21 21:58:56,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2020-12-21 21:58:56,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 304. [2020-12-21 21:58:56,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 304 states. [2020-12-21 21:58:56,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 341 transitions. [2020-12-21 21:58:56,483 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 341 transitions. Word has length 285 [2020-12-21 21:58:56,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:58:56,483 INFO L481 AbstractCegarLoop]: Abstraction has 304 states and 341 transitions. [2020-12-21 21:58:56,483 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-21 21:58:56,484 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 341 transitions. [2020-12-21 21:58:56,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 304 [2020-12-21 21:58:56,485 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:58:56,486 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 24, 22, 22, 13, 13, 13, 13, 13, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:58:56,699 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2020-12-21 21:58:56,700 INFO L429 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:58:56,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:58:56,700 INFO L82 PathProgramCache]: Analyzing trace with hash 577012007, now seen corresponding path program 43 times [2020-12-21 21:58:56,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:58:56,701 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283569267] [2020-12-21 21:58:56,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:58:56,722 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 21:58:56,722 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [503791852] [2020-12-21 21:58:56,723 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 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 [2020-12-21 21:58:56,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:58:56,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 725 conjuncts, 24 conjunts are in the unsatisfiable core [2020-12-21 21:58:56,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:58:57,580 INFO L134 CoverageAnalysis]: Checked inductivity of 3209 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 2725 trivial. 0 not checked. [2020-12-21 21:58:57,581 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283569267] [2020-12-21 21:58:57,581 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 21:58:57,581 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [503791852] [2020-12-21 21:58:57,581 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 21:58:57,581 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-12-21 21:58:57,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941448665] [2020-12-21 21:58:57,582 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-12-21 21:58:57,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:58:57,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-12-21 21:58:57,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2020-12-21 21:58:57,583 INFO L87 Difference]: Start difference. First operand 304 states and 341 transitions. Second operand 25 states. [2020-12-21 21:58:57,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:58:57,685 INFO L93 Difference]: Finished difference Result 564 states and 638 transitions. [2020-12-21 21:58:57,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-21 21:58:57,688 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 303 [2020-12-21 21:58:57,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:58:57,689 INFO L225 Difference]: With dead ends: 564 [2020-12-21 21:58:57,689 INFO L226 Difference]: Without dead ends: 307 [2020-12-21 21:58:57,690 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 279 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2020-12-21 21:58:57,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2020-12-21 21:58:57,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 306. [2020-12-21 21:58:57,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 306 states. [2020-12-21 21:58:57,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 343 transitions. [2020-12-21 21:58:57,699 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 343 transitions. Word has length 303 [2020-12-21 21:58:57,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:58:57,699 INFO L481 AbstractCegarLoop]: Abstraction has 306 states and 343 transitions. [2020-12-21 21:58:57,699 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-12-21 21:58:57,699 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 343 transitions. [2020-12-21 21:58:57,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 306 [2020-12-21 21:58:57,701 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:58:57,701 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 24, 23, 23, 13, 13, 13, 13, 13, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:58:57,915 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2020-12-21 21:58:57,916 INFO L429 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:58:57,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:58:57,916 INFO L82 PathProgramCache]: Analyzing trace with hash 1794510821, now seen corresponding path program 44 times [2020-12-21 21:58:57,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:58:57,917 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891532314] [2020-12-21 21:58:57,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:58:57,936 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 21:58:57,936 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1802527013] [2020-12-21 21:58:57,936 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 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 [2020-12-21 21:58:58,116 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 21:58:58,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:58:58,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 731 conjuncts, 25 conjunts are in the unsatisfiable core [2020-12-21 21:58:58,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:58:58,732 INFO L134 CoverageAnalysis]: Checked inductivity of 3254 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 2725 trivial. 0 not checked. [2020-12-21 21:58:58,732 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891532314] [2020-12-21 21:58:58,732 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 21:58:58,732 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1802527013] [2020-12-21 21:58:58,733 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 21:58:58,733 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-12-21 21:58:58,733 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797034752] [2020-12-21 21:58:58,733 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-12-21 21:58:58,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:58:58,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-12-21 21:58:58,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2020-12-21 21:58:58,734 INFO L87 Difference]: Start difference. First operand 306 states and 343 transitions. Second operand 26 states. [2020-12-21 21:58:58,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:58:58,832 INFO L93 Difference]: Finished difference Result 566 states and 640 transitions. [2020-12-21 21:58:58,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-21 21:58:58,833 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 305 [2020-12-21 21:58:58,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:58:58,835 INFO L225 Difference]: With dead ends: 566 [2020-12-21 21:58:58,835 INFO L226 Difference]: Without dead ends: 309 [2020-12-21 21:58:58,836 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 280 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2020-12-21 21:58:58,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2020-12-21 21:58:58,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 308. [2020-12-21 21:58:58,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 308 states. [2020-12-21 21:58:58,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 345 transitions. [2020-12-21 21:58:58,846 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 345 transitions. Word has length 305 [2020-12-21 21:58:58,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:58:58,847 INFO L481 AbstractCegarLoop]: Abstraction has 308 states and 345 transitions. [2020-12-21 21:58:58,847 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-12-21 21:58:58,847 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 345 transitions. [2020-12-21 21:58:58,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 308 [2020-12-21 21:58:58,849 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:58:58,849 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 24, 24, 24, 13, 13, 13, 13, 13, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:58:59,062 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:58:59,063 INFO L429 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:58:59,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:58:59,063 INFO L82 PathProgramCache]: Analyzing trace with hash -715200733, now seen corresponding path program 45 times [2020-12-21 21:58:59,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:58:59,064 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137861848] [2020-12-21 21:58:59,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:58:59,082 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 21:58:59,083 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1902712221] [2020-12-21 21:58:59,083 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 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 [2020-12-21 21:59:00,804 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2020-12-21 21:59:00,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:59:00,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 515 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-21 21:59:00,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:59:01,252 INFO L134 CoverageAnalysis]: Checked inductivity of 3301 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 3132 trivial. 0 not checked. [2020-12-21 21:59:01,253 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137861848] [2020-12-21 21:59:01,253 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 21:59:01,253 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1902712221] [2020-12-21 21:59:01,253 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 21:59:01,254 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-12-21 21:59:01,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412707207] [2020-12-21 21:59:01,255 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-21 21:59:01,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:59:01,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-21 21:59:01,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-12-21 21:59:01,256 INFO L87 Difference]: Start difference. First operand 308 states and 345 transitions. Second operand 16 states. [2020-12-21 21:59:01,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:59:01,320 INFO L93 Difference]: Finished difference Result 390 states and 439 transitions. [2020-12-21 21:59:01,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-21 21:59:01,320 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 307 [2020-12-21 21:59:01,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:59:01,322 INFO L225 Difference]: With dead ends: 390 [2020-12-21 21:59:01,322 INFO L226 Difference]: Without dead ends: 311 [2020-12-21 21:59:01,322 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 306 GetRequests, 292 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-12-21 21:59:01,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2020-12-21 21:59:01,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 310. [2020-12-21 21:59:01,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 310 states. [2020-12-21 21:59:01,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 347 transitions. [2020-12-21 21:59:01,333 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 347 transitions. Word has length 307 [2020-12-21 21:59:01,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:59:01,333 INFO L481 AbstractCegarLoop]: Abstraction has 310 states and 347 transitions. [2020-12-21 21:59:01,334 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-21 21:59:01,334 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 347 transitions. [2020-12-21 21:59:01,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 310 [2020-12-21 21:59:01,335 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:59:01,336 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 24, 24, 24, 14, 14, 13, 13, 13, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:59:01,548 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2020-12-21 21:59:01,549 INFO L429 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:59:01,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:59:01,549 INFO L82 PathProgramCache]: Analyzing trace with hash 995929377, now seen corresponding path program 46 times [2020-12-21 21:59:01,550 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:59:01,550 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973155219] [2020-12-21 21:59:01,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:59:01,568 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 21:59:01,569 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1774806345] [2020-12-21 21:59:01,569 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 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 [2020-12-21 21:59:01,770 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 21:59:01,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:59:01,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 741 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-21 21:59:01,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:59:02,263 INFO L134 CoverageAnalysis]: Checked inductivity of 3328 backedges. 425 proven. 301 refuted. 0 times theorem prover too weak. 2602 trivial. 0 not checked. [2020-12-21 21:59:02,263 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973155219] [2020-12-21 21:59:02,263 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 21:59:02,263 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1774806345] [2020-12-21 21:59:02,264 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 21:59:02,264 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-12-21 21:59:02,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156637289] [2020-12-21 21:59:02,264 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-21 21:59:02,265 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:59:02,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-21 21:59:02,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-12-21 21:59:02,265 INFO L87 Difference]: Start difference. First operand 310 states and 347 transitions. Second operand 18 states. [2020-12-21 21:59:02,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:59:02,669 INFO L93 Difference]: Finished difference Result 537 states and 625 transitions. [2020-12-21 21:59:02,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-21 21:59:02,670 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 309 [2020-12-21 21:59:02,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:59:02,672 INFO L225 Difference]: With dead ends: 537 [2020-12-21 21:59:02,672 INFO L226 Difference]: Without dead ends: 352 [2020-12-21 21:59:02,673 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 292 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-12-21 21:59:02,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2020-12-21 21:59:02,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 346. [2020-12-21 21:59:02,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 346 states. [2020-12-21 21:59:02,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 395 transitions. [2020-12-21 21:59:02,683 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 395 transitions. Word has length 309 [2020-12-21 21:59:02,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:59:02,683 INFO L481 AbstractCegarLoop]: Abstraction has 346 states and 395 transitions. [2020-12-21 21:59:02,684 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-21 21:59:02,684 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 395 transitions. [2020-12-21 21:59:02,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 346 [2020-12-21 21:59:02,686 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:59:02,686 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 28, 28, 24, 24, 15, 15, 15, 14, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:59:02,902 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:59:02,903 INFO L429 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:59:02,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:59:02,903 INFO L82 PathProgramCache]: Analyzing trace with hash -1140453663, now seen corresponding path program 47 times [2020-12-21 21:59:02,904 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:59:02,904 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127549810] [2020-12-21 21:59:02,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:59:02,925 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 21:59:02,925 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [869486796] [2020-12-21 21:59:02,926 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 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 [2020-12-21 22:00:46,082 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 29 check-sat command(s) [2020-12-21 22:00:46,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:00:46,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 837 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-21 22:00:46,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:00:46,717 INFO L134 CoverageAnalysis]: Checked inductivity of 4258 backedges. 601 proven. 260 refuted. 0 times theorem prover too weak. 3397 trivial. 0 not checked. [2020-12-21 22:00:46,718 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127549810] [2020-12-21 22:00:46,718 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:00:46,718 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [869486796] [2020-12-21 22:00:46,718 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:00:46,718 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-12-21 22:00:46,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421595236] [2020-12-21 22:00:46,719 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-21 22:00:46,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:00:46,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-21 22:00:46,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-12-21 22:00:46,720 INFO L87 Difference]: Start difference. First operand 346 states and 395 transitions. Second operand 16 states. [2020-12-21 22:00:46,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:00:46,971 INFO L93 Difference]: Finished difference Result 614 states and 714 transitions. [2020-12-21 22:00:46,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-21 22:00:46,972 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 345 [2020-12-21 22:00:46,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:00:46,974 INFO L225 Difference]: With dead ends: 614 [2020-12-21 22:00:46,974 INFO L226 Difference]: Without dead ends: 358 [2020-12-21 22:00:46,974 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 344 GetRequests, 330 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-12-21 22:00:46,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2020-12-21 22:00:46,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 355. [2020-12-21 22:00:46,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 355 states. [2020-12-21 22:00:46,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 404 transitions. [2020-12-21 22:00:46,985 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 404 transitions. Word has length 345 [2020-12-21 22:00:46,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:00:46,985 INFO L481 AbstractCegarLoop]: Abstraction has 355 states and 404 transitions. [2020-12-21 22:00:46,985 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-21 22:00:46,985 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 404 transitions. [2020-12-21 22:00:46,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 355 [2020-12-21 22:00:46,987 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:00:46,988 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 29, 29, 24, 24, 15, 15, 15, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:00:47,201 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2020-12-21 22:00:47,202 INFO L429 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:00:47,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:00:47,203 INFO L82 PathProgramCache]: Analyzing trace with hash 1762299706, now seen corresponding path program 48 times [2020-12-21 22:00:47,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:00:47,203 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468082751] [2020-12-21 22:00:47,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:00:47,225 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:00:47,226 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1919219782] [2020-12-21 22:00:47,226 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 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 [2020-12-21 22:01:02,290 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 29 check-sat command(s) [2020-12-21 22:01:02,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:01:02,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 819 conjuncts, 25 conjunts are in the unsatisfiable core [2020-12-21 22:01:02,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:01:03,013 INFO L134 CoverageAnalysis]: Checked inductivity of 4513 backedges. 597 proven. 495 refuted. 0 times theorem prover too weak. 3421 trivial. 0 not checked. [2020-12-21 22:01:03,013 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468082751] [2020-12-21 22:01:03,013 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:01:03,013 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1919219782] [2020-12-21 22:01:03,014 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:01:03,014 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-12-21 22:01:03,014 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620517180] [2020-12-21 22:01:03,014 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-21 22:01:03,014 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:01:03,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-21 22:01:03,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-12-21 22:01:03,015 INFO L87 Difference]: Start difference. First operand 355 states and 404 transitions. Second operand 22 states. [2020-12-21 22:01:03,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:01:03,655 INFO L93 Difference]: Finished difference Result 606 states and 711 transitions. [2020-12-21 22:01:03,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-21 22:01:03,655 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 354 [2020-12-21 22:01:03,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:01:03,657 INFO L225 Difference]: With dead ends: 606 [2020-12-21 22:01:03,657 INFO L226 Difference]: Without dead ends: 391 [2020-12-21 22:01:03,658 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 353 GetRequests, 333 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-12-21 22:01:03,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2020-12-21 22:01:03,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 391. [2020-12-21 22:01:03,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 391 states. [2020-12-21 22:01:03,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 452 transitions. [2020-12-21 22:01:03,671 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 452 transitions. Word has length 354 [2020-12-21 22:01:03,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:01:03,671 INFO L481 AbstractCegarLoop]: Abstraction has 391 states and 452 transitions. [2020-12-21 22:01:03,671 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-21 22:01:03,671 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 452 transitions. [2020-12-21 22:01:03,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 391 [2020-12-21 22:01:03,675 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:01:03,676 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 33, 33, 24, 24, 19, 19, 19, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:01:03,883 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:01:03,884 INFO L429 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:01:03,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:01:03,885 INFO L82 PathProgramCache]: Analyzing trace with hash 1185464954, now seen corresponding path program 49 times [2020-12-21 22:01:03,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:01:03,885 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725246326] [2020-12-21 22:01:03,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:01:03,908 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:01:03,909 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2088954268] [2020-12-21 22:01:03,909 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-21 22:01:04,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:01:04,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 945 conjuncts, 26 conjunts are in the unsatisfiable core [2020-12-21 22:01:04,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:01:04,995 INFO L134 CoverageAnalysis]: Checked inductivity of 5623 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 5047 trivial. 0 not checked. [2020-12-21 22:01:04,995 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725246326] [2020-12-21 22:01:04,996 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:01:04,996 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2088954268] [2020-12-21 22:01:04,996 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:01:04,996 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-12-21 22:01:04,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944433176] [2020-12-21 22:01:04,997 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-12-21 22:01:04,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:01:04,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-12-21 22:01:04,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2020-12-21 22:01:04,998 INFO L87 Difference]: Start difference. First operand 391 states and 452 transitions. Second operand 27 states. [2020-12-21 22:01:05,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:01:05,112 INFO L93 Difference]: Finished difference Result 734 states and 856 transitions. [2020-12-21 22:01:05,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-12-21 22:01:05,113 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 390 [2020-12-21 22:01:05,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:01:05,115 INFO L225 Difference]: With dead ends: 734 [2020-12-21 22:01:05,115 INFO L226 Difference]: Without dead ends: 394 [2020-12-21 22:01:05,116 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 389 GetRequests, 364 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2020-12-21 22:01:05,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2020-12-21 22:01:05,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 393. [2020-12-21 22:01:05,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 393 states. [2020-12-21 22:01:05,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 454 transitions. [2020-12-21 22:01:05,127 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 454 transitions. Word has length 390 [2020-12-21 22:01:05,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:01:05,128 INFO L481 AbstractCegarLoop]: Abstraction has 393 states and 454 transitions. [2020-12-21 22:01:05,128 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-12-21 22:01:05,128 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 454 transitions. [2020-12-21 22:01:05,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 393 [2020-12-21 22:01:05,130 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:01:05,131 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 33, 33, 25, 25, 19, 19, 19, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:01:05,343 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2020-12-21 22:01:05,344 INFO L429 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:01:05,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:01:05,345 INFO L82 PathProgramCache]: Analyzing trace with hash 2034396668, now seen corresponding path program 50 times [2020-12-21 22:01:05,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:01:05,345 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194127330] [2020-12-21 22:01:05,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:01:05,368 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:01:05,369 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [773511670] [2020-12-21 22:01:05,369 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 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 [2020-12-21 22:01:05,642 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 22:01:05,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:01:05,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 951 conjuncts, 27 conjunts are in the unsatisfiable core [2020-12-21 22:01:05,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:01:06,469 INFO L134 CoverageAnalysis]: Checked inductivity of 5672 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 5047 trivial. 0 not checked. [2020-12-21 22:01:06,470 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194127330] [2020-12-21 22:01:06,470 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:01:06,470 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773511670] [2020-12-21 22:01:06,470 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:01:06,470 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-12-21 22:01:06,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56403926] [2020-12-21 22:01:06,471 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-12-21 22:01:06,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:01:06,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-12-21 22:01:06,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2020-12-21 22:01:06,473 INFO L87 Difference]: Start difference. First operand 393 states and 454 transitions. Second operand 28 states. [2020-12-21 22:01:06,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:01:06,576 INFO L93 Difference]: Finished difference Result 736 states and 858 transitions. [2020-12-21 22:01:06,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-21 22:01:06,577 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 392 [2020-12-21 22:01:06,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:01:06,579 INFO L225 Difference]: With dead ends: 736 [2020-12-21 22:01:06,579 INFO L226 Difference]: Without dead ends: 396 [2020-12-21 22:01:06,580 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 391 GetRequests, 365 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2020-12-21 22:01:06,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2020-12-21 22:01:06,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 395. [2020-12-21 22:01:06,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 395 states. [2020-12-21 22:01:06,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 456 transitions. [2020-12-21 22:01:06,613 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 456 transitions. Word has length 392 [2020-12-21 22:01:06,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:01:06,613 INFO L481 AbstractCegarLoop]: Abstraction has 395 states and 456 transitions. [2020-12-21 22:01:06,614 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-12-21 22:01:06,614 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 456 transitions. [2020-12-21 22:01:06,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 395 [2020-12-21 22:01:06,617 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:01:06,618 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 33, 33, 26, 26, 19, 19, 19, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:01:06,832 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:01:06,833 INFO L429 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:01:06,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:01:06,834 INFO L82 PathProgramCache]: Analyzing trace with hash 1813987582, now seen corresponding path program 51 times [2020-12-21 22:01:06,834 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:01:06,834 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180443534] [2020-12-21 22:01:06,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:01:06,856 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:01:06,856 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [330779949] [2020-12-21 22:01:06,856 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 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 [2020-12-21 22:01:09,850 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2020-12-21 22:01:09,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:01:09,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 537 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-21 22:01:09,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:01:10,458 INFO L134 CoverageAnalysis]: Checked inductivity of 5723 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 5527 trivial. 0 not checked. [2020-12-21 22:01:10,459 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180443534] [2020-12-21 22:01:10,459 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:01:10,459 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330779949] [2020-12-21 22:01:10,459 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:01:10,459 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-12-21 22:01:10,459 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528486598] [2020-12-21 22:01:10,460 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-21 22:01:10,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:01:10,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-21 22:01:10,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-12-21 22:01:10,460 INFO L87 Difference]: Start difference. First operand 395 states and 456 transitions. Second operand 17 states. [2020-12-21 22:01:10,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:01:10,537 INFO L93 Difference]: Finished difference Result 504 states and 585 transitions. [2020-12-21 22:01:10,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-21 22:01:10,538 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 394 [2020-12-21 22:01:10,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:01:10,540 INFO L225 Difference]: With dead ends: 504 [2020-12-21 22:01:10,540 INFO L226 Difference]: Without dead ends: 398 [2020-12-21 22:01:10,541 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 393 GetRequests, 378 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-12-21 22:01:10,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2020-12-21 22:01:10,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 397. [2020-12-21 22:01:10,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 397 states. [2020-12-21 22:01:10,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 458 transitions. [2020-12-21 22:01:10,554 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 458 transitions. Word has length 394 [2020-12-21 22:01:10,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:01:10,555 INFO L481 AbstractCegarLoop]: Abstraction has 397 states and 458 transitions. [2020-12-21 22:01:10,555 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-21 22:01:10,555 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 458 transitions. [2020-12-21 22:01:10,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 397 [2020-12-21 22:01:10,557 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:01:10,558 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 33, 33, 26, 26, 19, 19, 19, 15, 15, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:01:10,772 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2020-12-21 22:01:10,773 INFO L429 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:01:10,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:01:10,774 INFO L82 PathProgramCache]: Analyzing trace with hash 524133888, now seen corresponding path program 52 times [2020-12-21 22:01:10,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:01:10,774 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800144225] [2020-12-21 22:01:10,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:01:10,796 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:01:10,797 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [81162946] [2020-12-21 22:01:10,797 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 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 [2020-12-21 22:01:11,073 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 22:01:11,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:01:11,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 961 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-21 22:01:11,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:01:11,734 INFO L134 CoverageAnalysis]: Checked inductivity of 5752 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 5527 trivial. 0 not checked. [2020-12-21 22:01:11,734 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800144225] [2020-12-21 22:01:11,734 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:01:11,734 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [81162946] [2020-12-21 22:01:11,735 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:01:11,735 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-12-21 22:01:11,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168232282] [2020-12-21 22:01:11,735 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-21 22:01:11,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:01:11,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-21 22:01:11,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-12-21 22:01:11,736 INFO L87 Difference]: Start difference. First operand 397 states and 458 transitions. Second operand 18 states. [2020-12-21 22:01:11,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:01:11,810 INFO L93 Difference]: Finished difference Result 506 states and 587 transitions. [2020-12-21 22:01:11,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-21 22:01:11,810 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 396 [2020-12-21 22:01:11,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:01:11,813 INFO L225 Difference]: With dead ends: 506 [2020-12-21 22:01:11,813 INFO L226 Difference]: Without dead ends: 400 [2020-12-21 22:01:11,814 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 395 GetRequests, 379 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-12-21 22:01:11,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2020-12-21 22:01:11,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 399. [2020-12-21 22:01:11,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 399 states. [2020-12-21 22:01:11,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 460 transitions. [2020-12-21 22:01:11,827 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 460 transitions. Word has length 396 [2020-12-21 22:01:11,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:01:11,827 INFO L481 AbstractCegarLoop]: Abstraction has 399 states and 460 transitions. [2020-12-21 22:01:11,827 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-21 22:01:11,828 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 460 transitions. [2020-12-21 22:01:11,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 399 [2020-12-21 22:01:11,830 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:01:11,831 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 33, 33, 26, 26, 19, 19, 19, 16, 16, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:01:12,045 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:01:12,046 INFO L429 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:01:12,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:01:12,046 INFO L82 PathProgramCache]: Analyzing trace with hash -2074684798, now seen corresponding path program 53 times [2020-12-21 22:01:12,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:01:12,047 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29100424] [2020-12-21 22:01:12,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:01:12,071 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:01:12,072 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1183555569] [2020-12-21 22:01:12,072 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 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