/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/reducercommutativity/rangesum60.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 22:27:52,539 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 22:27:52,541 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 22:27:52,553 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 22:27:52,553 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 22:27:52,554 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 22:27:52,556 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 22:27:52,557 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 22:27:52,559 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 22:27:52,560 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 22:27:52,561 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 22:27:52,562 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 22:27:52,562 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 22:27:52,563 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 22:27:52,564 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 22:27:52,565 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 22:27:52,566 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 22:27:52,567 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 22:27:52,568 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 22:27:52,570 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 22:27:52,572 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 22:27:52,573 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 22:27:52,574 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 22:27:52,574 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 22:27:52,576 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 22:27:52,584 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-23 22:27:52,585 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-23 22:27:52,585 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-23 22:27:52,586 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-23 22:27:52,608 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 22:27:52,608 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 22:27:52,609 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-23 22:27:52,610 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-23 22:27:52,610 INFO L138 SettingsManager]: * Use SBE=true [2019-11-23 22:27:52,610 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 22:27:52,610 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 22:27:52,610 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 22:27:52,611 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 22:27:52,611 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 22:27:52,612 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 22:27:52,612 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 22:27:52,612 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 22:27:52,613 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-23 22:27:52,613 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 22:27:52,613 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 22:27:52,613 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-23 22:27:52,613 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 22:27:52,613 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 22:27:52,614 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-23 22:27:52,614 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 22:27:52,614 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 22:27:52,614 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 22:27:52,615 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 22:27:52,615 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 22:27:52,615 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 22:27:52,615 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-23 22:27:52,615 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 22:27:52,616 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 22:27:52,616 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 22:27:52,914 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 22:27:52,936 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 22:27:52,939 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 22:27:52,941 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 22:27:52,941 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 22:27:52,942 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/reducercommutativity/rangesum60.i [2019-11-23 22:27:53,011 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/32612bac6/2f50d34868a04006b055a96cdb0c3227/FLAG0c55658da [2019-11-23 22:27:53,441 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 22:27:53,441 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/reducercommutativity/rangesum60.i [2019-11-23 22:27:53,446 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/32612bac6/2f50d34868a04006b055a96cdb0c3227/FLAG0c55658da [2019-11-23 22:27:53,826 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/32612bac6/2f50d34868a04006b055a96cdb0c3227 [2019-11-23 22:27:53,836 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 22:27:53,838 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 22:27:53,839 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 22:27:53,839 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 22:27:53,843 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 22:27:53,844 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:27:53" (1/1) ... [2019-11-23 22:27:53,846 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4bcfe847 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:27:53, skipping insertion in model container [2019-11-23 22:27:53,847 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:27:53" (1/1) ... [2019-11-23 22:27:53,854 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 22:27:53,872 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 22:27:54,091 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 22:27:54,102 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 22:27:54,133 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 22:27:54,151 INFO L208 MainTranslator]: Completed translation [2019-11-23 22:27:54,152 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:27:54 WrapperNode [2019-11-23 22:27:54,152 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 22:27:54,153 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 22:27:54,153 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 22:27:54,153 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 22:27:54,236 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:27:54" (1/1) ... [2019-11-23 22:27:54,258 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:27:54" (1/1) ... [2019-11-23 22:27:54,299 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 22:27:54,300 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 22:27:54,300 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 22:27:54,300 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 22:27:54,311 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:27:54" (1/1) ... [2019-11-23 22:27:54,312 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:27:54" (1/1) ... [2019-11-23 22:27:54,315 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:27:54" (1/1) ... [2019-11-23 22:27:54,315 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:27:54" (1/1) ... [2019-11-23 22:27:54,322 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:27:54" (1/1) ... [2019-11-23 22:27:54,328 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:27:54" (1/1) ... [2019-11-23 22:27:54,330 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:27:54" (1/1) ... [2019-11-23 22:27:54,333 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 22:27:54,334 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 22:27:54,334 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 22:27:54,334 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 22:27:54,335 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:27:54" (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 [2019-11-23 22:27:54,398 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-23 22:27:54,398 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 22:27:54,398 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 22:27:54,399 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-23 22:27:54,399 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-23 22:27:54,399 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-23 22:27:54,778 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 22:27:54,778 INFO L284 CfgBuilder]: Removed 17 assume(true) statements. [2019-11-23 22:27:54,779 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:27:54 BoogieIcfgContainer [2019-11-23 22:27:54,780 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 22:27:54,781 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 22:27:54,781 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 22:27:54,784 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 22:27:54,784 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 10:27:53" (1/3) ... [2019-11-23 22:27:54,785 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ff51169 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:27:54, skipping insertion in model container [2019-11-23 22:27:54,785 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:27:54" (2/3) ... [2019-11-23 22:27:54,785 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ff51169 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:27:54, skipping insertion in model container [2019-11-23 22:27:54,786 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:27:54" (3/3) ... [2019-11-23 22:27:54,787 INFO L109 eAbstractionObserver]: Analyzing ICFG rangesum60.i [2019-11-23 22:27:54,797 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 22:27:54,804 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 22:27:54,814 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 22:27:54,836 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 22:27:54,837 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 22:27:54,837 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 22:27:54,837 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 22:27:54,837 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 22:27:54,837 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 22:27:54,837 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 22:27:54,838 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 22:27:54,851 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states. [2019-11-23 22:27:54,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-23 22:27:54,857 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:27:54,858 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:27:54,859 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:27:54,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:27:54,863 INFO L82 PathProgramCache]: Analyzing trace with hash -919167012, now seen corresponding path program 1 times [2019-11-23 22:27:54,872 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:27:54,872 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938466147] [2019-11-23 22:27:54,872 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:27:54,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:27:54,999 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:27:55,000 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938466147] [2019-11-23 22:27:55,001 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:27:55,002 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-23 22:27:55,003 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539796141] [2019-11-23 22:27:55,008 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-23 22:27:55,008 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:27:55,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-23 22:27:55,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-23 22:27:55,025 INFO L87 Difference]: Start difference. First operand 30 states. Second operand 2 states. [2019-11-23 22:27:55,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:27:55,043 INFO L93 Difference]: Finished difference Result 56 states and 86 transitions. [2019-11-23 22:27:55,043 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-23 22:27:55,044 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 17 [2019-11-23 22:27:55,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:27:55,051 INFO L225 Difference]: With dead ends: 56 [2019-11-23 22:27:55,052 INFO L226 Difference]: Without dead ends: 26 [2019-11-23 22:27:55,055 INFO L630 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 [2019-11-23 22:27:55,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-11-23 22:27:55,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2019-11-23 22:27:55,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-11-23 22:27:55,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 36 transitions. [2019-11-23 22:27:55,092 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 36 transitions. Word has length 17 [2019-11-23 22:27:55,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:27:55,093 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 36 transitions. [2019-11-23 22:27:55,093 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-23 22:27:55,093 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 36 transitions. [2019-11-23 22:27:55,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-23 22:27:55,094 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:27:55,094 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:27:55,095 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:27:55,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:27:55,096 INFO L82 PathProgramCache]: Analyzing trace with hash 164788593, now seen corresponding path program 1 times [2019-11-23 22:27:55,096 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:27:55,096 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803171151] [2019-11-23 22:27:55,097 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:27:55,111 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:27:55,112 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2026999199] [2019-11-23 22:27:55,112 INFO L94 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 [2019-11-23 22:27:55,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:27:55,256 INFO L255 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-23 22:27:55,265 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:27:55,307 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:27:55,312 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803171151] [2019-11-23 22:27:55,312 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:27:55,313 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2026999199] [2019-11-23 22:27:55,313 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:27:55,313 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 22:27:55,314 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863432256] [2019-11-23 22:27:55,315 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 22:27:55,316 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:27:55,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 22:27:55,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 22:27:55,318 INFO L87 Difference]: Start difference. First operand 26 states and 36 transitions. Second operand 3 states. [2019-11-23 22:27:55,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:27:55,342 INFO L93 Difference]: Finished difference Result 50 states and 70 transitions. [2019-11-23 22:27:55,345 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 22:27:55,345 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2019-11-23 22:27:55,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:27:55,346 INFO L225 Difference]: With dead ends: 50 [2019-11-23 22:27:55,346 INFO L226 Difference]: Without dead ends: 28 [2019-11-23 22:27:55,349 INFO L630 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 [2019-11-23 22:27:55,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-11-23 22:27:55,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2019-11-23 22:27:55,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-11-23 22:27:55,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 37 transitions. [2019-11-23 22:27:55,358 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 37 transitions. Word has length 17 [2019-11-23 22:27:55,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:27:55,358 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 37 transitions. [2019-11-23 22:27:55,359 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 22:27:55,359 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 37 transitions. [2019-11-23 22:27:55,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-23 22:27:55,360 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:27:55,360 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:27:55,563 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:27:55,564 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:27:55,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:27:55,565 INFO L82 PathProgramCache]: Analyzing trace with hash -1403287377, now seen corresponding path program 1 times [2019-11-23 22:27:55,565 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:27:55,566 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377279612] [2019-11-23 22:27:55,566 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:27:55,606 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:27:55,607 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1317174400] [2019-11-23 22:27:55,607 INFO L94 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 [2019-11-23 22:27:55,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:27:55,681 INFO L255 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-23 22:27:55,683 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:27:55,693 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 22:27:55,693 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377279612] [2019-11-23 22:27:55,694 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:27:55,694 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1317174400] [2019-11-23 22:27:55,694 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:27:55,694 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 22:27:55,695 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074890970] [2019-11-23 22:27:55,695 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 22:27:55,695 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:27:55,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 22:27:55,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 22:27:55,696 INFO L87 Difference]: Start difference. First operand 27 states and 37 transitions. Second operand 3 states. [2019-11-23 22:27:55,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:27:55,763 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2019-11-23 22:27:55,765 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 22:27:55,765 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2019-11-23 22:27:55,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:27:55,767 INFO L225 Difference]: With dead ends: 57 [2019-11-23 22:27:55,768 INFO L226 Difference]: Without dead ends: 36 [2019-11-23 22:27:55,768 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 22:27:55,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-11-23 22:27:55,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 33. [2019-11-23 22:27:55,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-11-23 22:27:55,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 43 transitions. [2019-11-23 22:27:55,780 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 43 transitions. Word has length 19 [2019-11-23 22:27:55,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:27:55,781 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 43 transitions. [2019-11-23 22:27:55,781 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 22:27:55,781 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 43 transitions. [2019-11-23 22:27:55,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-11-23 22:27:55,784 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:27:55,784 INFO L410 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] [2019-11-23 22:27:55,987 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:27:55,987 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:27:55,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:27:55,988 INFO L82 PathProgramCache]: Analyzing trace with hash -1132417868, now seen corresponding path program 1 times [2019-11-23 22:27:55,988 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:27:55,988 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63572610] [2019-11-23 22:27:55,988 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:27:56,012 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:27:56,013 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [106641839] [2019-11-23 22:27:56,013 INFO L94 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 [2019-11-23 22:27:56,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:27:56,076 INFO L255 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 22:27:56,078 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:27:56,086 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-23 22:27:56,087 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63572610] [2019-11-23 22:27:56,087 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:27:56,087 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [106641839] [2019-11-23 22:27:56,088 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:27:56,088 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 22:27:56,088 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673072437] [2019-11-23 22:27:56,089 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 22:27:56,089 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:27:56,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 22:27:56,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 22:27:56,090 INFO L87 Difference]: Start difference. First operand 33 states and 43 transitions. Second operand 3 states. [2019-11-23 22:27:56,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:27:56,502 INFO L93 Difference]: Finished difference Result 75 states and 100 transitions. [2019-11-23 22:27:56,502 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 22:27:56,502 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2019-11-23 22:27:56,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:27:56,503 INFO L225 Difference]: With dead ends: 75 [2019-11-23 22:27:56,503 INFO L226 Difference]: Without dead ends: 54 [2019-11-23 22:27:56,504 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 22:27:56,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-11-23 22:27:56,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 45. [2019-11-23 22:27:56,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2019-11-23 22:27:56,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 61 transitions. [2019-11-23 22:27:56,513 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 61 transitions. Word has length 28 [2019-11-23 22:27:56,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:27:56,513 INFO L462 AbstractCegarLoop]: Abstraction has 45 states and 61 transitions. [2019-11-23 22:27:56,514 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 22:27:56,515 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 61 transitions. [2019-11-23 22:27:56,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-11-23 22:27:56,516 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:27:56,516 INFO L410 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] [2019-11-23 22:27:56,721 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:27:56,721 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:27:56,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:27:56,722 INFO L82 PathProgramCache]: Analyzing trace with hash 1168464304, now seen corresponding path program 1 times [2019-11-23 22:27:56,722 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:27:56,722 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833831020] [2019-11-23 22:27:56,723 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:27:56,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:27:56,791 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-23 22:27:56,791 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833831020] [2019-11-23 22:27:56,791 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:27:56,791 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 22:27:56,792 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878763598] [2019-11-23 22:27:56,792 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 22:27:56,792 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:27:56,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 22:27:56,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 22:27:56,793 INFO L87 Difference]: Start difference. First operand 45 states and 61 transitions. Second operand 4 states. [2019-11-23 22:27:56,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:27:56,889 INFO L93 Difference]: Finished difference Result 85 states and 118 transitions. [2019-11-23 22:27:56,890 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 22:27:56,890 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 28 [2019-11-23 22:27:56,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:27:56,891 INFO L225 Difference]: With dead ends: 85 [2019-11-23 22:27:56,891 INFO L226 Difference]: Without dead ends: 54 [2019-11-23 22:27:56,892 INFO L630 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 [2019-11-23 22:27:56,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-11-23 22:27:56,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 39. [2019-11-23 22:27:56,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-11-23 22:27:56,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 49 transitions. [2019-11-23 22:27:56,899 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 49 transitions. Word has length 28 [2019-11-23 22:27:56,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:27:56,900 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 49 transitions. [2019-11-23 22:27:56,900 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 22:27:56,900 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 49 transitions. [2019-11-23 22:27:56,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-11-23 22:27:56,901 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:27:56,901 INFO L410 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1] [2019-11-23 22:27:56,901 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:27:56,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:27:56,902 INFO L82 PathProgramCache]: Analyzing trace with hash -483510003, now seen corresponding path program 1 times [2019-11-23 22:27:56,902 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:27:56,902 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713357676] [2019-11-23 22:27:56,902 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:27:56,914 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:27:56,915 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [756573881] [2019-11-23 22:27:56,915 INFO L94 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 [2019-11-23 22:27:56,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:27:56,986 INFO L255 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-23 22:27:56,988 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:27:57,001 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-11-23 22:27:57,001 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713357676] [2019-11-23 22:27:57,002 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:27:57,002 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756573881] [2019-11-23 22:27:57,002 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:27:57,002 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 22:27:57,003 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415493152] [2019-11-23 22:27:57,003 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 22:27:57,003 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:27:57,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 22:27:57,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 22:27:57,004 INFO L87 Difference]: Start difference. First operand 39 states and 49 transitions. Second operand 3 states. [2019-11-23 22:27:57,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:27:57,026 INFO L93 Difference]: Finished difference Result 54 states and 67 transitions. [2019-11-23 22:27:57,027 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 22:27:57,027 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 37 [2019-11-23 22:27:57,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:27:57,028 INFO L225 Difference]: With dead ends: 54 [2019-11-23 22:27:57,028 INFO L226 Difference]: Without dead ends: 41 [2019-11-23 22:27:57,029 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 22:27:57,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-11-23 22:27:57,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2019-11-23 22:27:57,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-11-23 22:27:57,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 50 transitions. [2019-11-23 22:27:57,034 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 50 transitions. Word has length 37 [2019-11-23 22:27:57,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:27:57,035 INFO L462 AbstractCegarLoop]: Abstraction has 40 states and 50 transitions. [2019-11-23 22:27:57,035 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 22:27:57,035 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 50 transitions. [2019-11-23 22:27:57,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-11-23 22:27:57,036 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:27:57,036 INFO L410 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:27:57,244 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:27:57,245 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:27:57,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:27:57,247 INFO L82 PathProgramCache]: Analyzing trace with hash -623311861, now seen corresponding path program 1 times [2019-11-23 22:27:57,247 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:27:57,248 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541922574] [2019-11-23 22:27:57,248 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:27:57,259 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:27:57,260 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [667232569] [2019-11-23 22:27:57,260 INFO L94 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 [2019-11-23 22:27:57,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:27:57,320 INFO L255 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 22:27:57,324 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:27:57,342 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-11-23 22:27:57,342 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541922574] [2019-11-23 22:27:57,342 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:27:57,343 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [667232569] [2019-11-23 22:27:57,343 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:27:57,343 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2019-11-23 22:27:57,343 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441973934] [2019-11-23 22:27:57,344 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 22:27:57,344 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:27:57,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 22:27:57,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 22:27:57,345 INFO L87 Difference]: Start difference. First operand 40 states and 50 transitions. Second operand 4 states. [2019-11-23 22:27:57,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:27:57,364 INFO L93 Difference]: Finished difference Result 78 states and 98 transitions. [2019-11-23 22:27:57,365 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 22:27:57,365 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 39 [2019-11-23 22:27:57,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:27:57,366 INFO L225 Difference]: With dead ends: 78 [2019-11-23 22:27:57,366 INFO L226 Difference]: Without dead ends: 43 [2019-11-23 22:27:57,367 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 22:27:57,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-11-23 22:27:57,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2019-11-23 22:27:57,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-11-23 22:27:57,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 52 transitions. [2019-11-23 22:27:57,372 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 52 transitions. Word has length 39 [2019-11-23 22:27:57,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:27:57,373 INFO L462 AbstractCegarLoop]: Abstraction has 42 states and 52 transitions. [2019-11-23 22:27:57,373 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 22:27:57,373 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 52 transitions. [2019-11-23 22:27:57,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-11-23 22:27:57,376 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:27:57,378 INFO L410 BasicCegarLoop]: trace histogram [2, 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, 1, 1, 1, 1, 1] [2019-11-23 22:27:57,581 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:27:57,582 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:27:57,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:27:57,582 INFO L82 PathProgramCache]: Analyzing trace with hash -526389047, now seen corresponding path program 2 times [2019-11-23 22:27:57,582 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:27:57,583 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789354786] [2019-11-23 22:27:57,583 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:27:57,599 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:27:57,599 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [678915196] [2019-11-23 22:27:57,600 INFO L92 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 [2019-11-23 22:27:57,674 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 22:27:57,674 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:27:57,676 INFO L255 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 22:27:57,678 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:27:57,694 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-23 22:27:57,696 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789354786] [2019-11-23 22:27:57,697 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:27:57,697 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [678915196] [2019-11-23 22:27:57,697 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:27:57,697 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2019-11-23 22:27:57,697 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305892436] [2019-11-23 22:27:57,698 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 22:27:57,698 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:27:57,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 22:27:57,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 22:27:57,701 INFO L87 Difference]: Start difference. First operand 42 states and 52 transitions. Second operand 4 states. [2019-11-23 22:27:57,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:27:57,779 INFO L93 Difference]: Finished difference Result 86 states and 108 transitions. [2019-11-23 22:27:57,779 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 22:27:57,779 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 41 [2019-11-23 22:27:57,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:27:57,780 INFO L225 Difference]: With dead ends: 86 [2019-11-23 22:27:57,780 INFO L226 Difference]: Without dead ends: 54 [2019-11-23 22:27:57,781 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 22:27:57,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-11-23 22:27:57,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 51. [2019-11-23 22:27:57,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2019-11-23 22:27:57,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 61 transitions. [2019-11-23 22:27:57,799 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 61 transitions. Word has length 41 [2019-11-23 22:27:57,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:27:57,799 INFO L462 AbstractCegarLoop]: Abstraction has 51 states and 61 transitions. [2019-11-23 22:27:57,799 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 22:27:57,799 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 61 transitions. [2019-11-23 22:27:57,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2019-11-23 22:27:57,801 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:27:57,801 INFO L410 BasicCegarLoop]: trace histogram [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, 1, 1] [2019-11-23 22:27:58,013 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:27:58,014 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:27:58,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:27:58,014 INFO L82 PathProgramCache]: Analyzing trace with hash -1393104750, now seen corresponding path program 3 times [2019-11-23 22:27:58,014 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:27:58,015 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586514987] [2019-11-23 22:27:58,015 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:27:58,029 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:27:58,029 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1787172975] [2019-11-23 22:27:58,029 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2019-11-23 22:27:58,096 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-11-23 22:27:58,097 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:27:58,098 INFO L255 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 22:27:58,104 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:27:58,122 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2019-11-23 22:27:58,123 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586514987] [2019-11-23 22:27:58,123 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:27:58,123 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787172975] [2019-11-23 22:27:58,123 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:27:58,124 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2019-11-23 22:27:58,124 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30869130] [2019-11-23 22:27:58,124 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 22:27:58,125 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:27:58,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 22:27:58,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 22:27:58,125 INFO L87 Difference]: Start difference. First operand 51 states and 61 transitions. Second operand 4 states. [2019-11-23 22:27:58,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:27:58,146 INFO L93 Difference]: Finished difference Result 70 states and 83 transitions. [2019-11-23 22:27:58,147 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 22:27:58,147 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 50 [2019-11-23 22:27:58,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:27:58,148 INFO L225 Difference]: With dead ends: 70 [2019-11-23 22:27:58,148 INFO L226 Difference]: Without dead ends: 54 [2019-11-23 22:27:58,149 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 22:27:58,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-11-23 22:27:58,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2019-11-23 22:27:58,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2019-11-23 22:27:58,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 63 transitions. [2019-11-23 22:27:58,156 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 63 transitions. Word has length 50 [2019-11-23 22:27:58,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:27:58,156 INFO L462 AbstractCegarLoop]: Abstraction has 53 states and 63 transitions. [2019-11-23 22:27:58,156 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 22:27:58,156 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 63 transitions. [2019-11-23 22:27:58,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2019-11-23 22:27:58,158 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:27:58,158 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 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] [2019-11-23 22:27:58,361 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:27:58,362 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:27:58,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:27:58,362 INFO L82 PathProgramCache]: Analyzing trace with hash -1656359148, now seen corresponding path program 4 times [2019-11-23 22:27:58,362 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:27:58,363 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660406442] [2019-11-23 22:27:58,364 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:27:58,377 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:27:58,378 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [770613852] [2019-11-23 22:27:58,378 INFO L92 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 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 [2019-11-23 22:27:58,441 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 22:27:58,442 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:27:58,443 INFO L255 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 22:27:58,445 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:27:58,481 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2019-11-23 22:27:58,482 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660406442] [2019-11-23 22:27:58,482 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:27:58,482 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770613852] [2019-11-23 22:27:58,482 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:27:58,483 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2019-11-23 22:27:58,483 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900374646] [2019-11-23 22:27:58,483 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-23 22:27:58,483 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:27:58,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-23 22:27:58,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 22:27:58,485 INFO L87 Difference]: Start difference. First operand 53 states and 63 transitions. Second operand 5 states. [2019-11-23 22:27:58,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:27:58,514 INFO L93 Difference]: Finished difference Result 72 states and 85 transitions. [2019-11-23 22:27:58,517 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-23 22:27:58,518 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 52 [2019-11-23 22:27:58,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:27:58,518 INFO L225 Difference]: With dead ends: 72 [2019-11-23 22:27:58,519 INFO L226 Difference]: Without dead ends: 56 [2019-11-23 22:27:58,521 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 22:27:58,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2019-11-23 22:27:58,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2019-11-23 22:27:58,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2019-11-23 22:27:58,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 65 transitions. [2019-11-23 22:27:58,534 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 65 transitions. Word has length 52 [2019-11-23 22:27:58,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:27:58,535 INFO L462 AbstractCegarLoop]: Abstraction has 55 states and 65 transitions. [2019-11-23 22:27:58,535 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-23 22:27:58,535 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 65 transitions. [2019-11-23 22:27:58,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2019-11-23 22:27:58,537 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:27:58,537 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 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] [2019-11-23 22:27:58,751 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:27:58,751 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:27:58,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:27:58,752 INFO L82 PathProgramCache]: Analyzing trace with hash -1240765162, now seen corresponding path program 5 times [2019-11-23 22:27:58,752 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:27:58,752 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940244336] [2019-11-23 22:27:58,752 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:27:58,776 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:27:58,776 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1419759745] [2019-11-23 22:27:58,776 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:27:58,848 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-11-23 22:27:58,848 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:27:58,850 INFO L255 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 22:27:58,852 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:27:58,873 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2019-11-23 22:27:58,874 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940244336] [2019-11-23 22:27:58,874 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:27:58,874 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1419759745] [2019-11-23 22:27:58,875 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:27:58,875 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2019-11-23 22:27:58,875 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032474678] [2019-11-23 22:27:58,876 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-23 22:27:58,876 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:27:58,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-23 22:27:58,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 22:27:58,881 INFO L87 Difference]: Start difference. First operand 55 states and 65 transitions. Second operand 5 states. [2019-11-23 22:27:58,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:27:58,964 INFO L93 Difference]: Finished difference Result 109 states and 131 transitions. [2019-11-23 22:27:58,964 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-23 22:27:58,964 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 54 [2019-11-23 22:27:58,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:27:58,965 INFO L225 Difference]: With dead ends: 109 [2019-11-23 22:27:58,965 INFO L226 Difference]: Without dead ends: 67 [2019-11-23 22:27:58,966 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 22:27:58,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2019-11-23 22:27:58,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 64. [2019-11-23 22:27:58,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2019-11-23 22:27:58,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 74 transitions. [2019-11-23 22:27:58,976 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 74 transitions. Word has length 54 [2019-11-23 22:27:58,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:27:58,982 INFO L462 AbstractCegarLoop]: Abstraction has 64 states and 74 transitions. [2019-11-23 22:27:58,982 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-23 22:27:58,982 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 74 transitions. [2019-11-23 22:27:58,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2019-11-23 22:27:58,983 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:27:58,983 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 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] [2019-11-23 22:27:59,187 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:27:59,188 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:27:59,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:27:59,188 INFO L82 PathProgramCache]: Analyzing trace with hash -293355419, now seen corresponding path program 6 times [2019-11-23 22:27:59,189 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:27:59,189 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463639825] [2019-11-23 22:27:59,190 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:27:59,203 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:27:59,203 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [153479473] [2019-11-23 22:27:59,203 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 [2019-11-23 22:27:59,264 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-11-23 22:27:59,264 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:27:59,265 INFO L255 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 22:27:59,267 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:27:59,308 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2019-11-23 22:27:59,308 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463639825] [2019-11-23 22:27:59,308 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:27:59,309 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153479473] [2019-11-23 22:27:59,309 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:27:59,309 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 22:27:59,309 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531993659] [2019-11-23 22:27:59,310 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 22:27:59,310 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:27:59,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 22:27:59,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 22:27:59,310 INFO L87 Difference]: Start difference. First operand 64 states and 74 transitions. Second operand 4 states. [2019-11-23 22:27:59,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:27:59,395 INFO L93 Difference]: Finished difference Result 115 states and 134 transitions. [2019-11-23 22:27:59,395 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 22:27:59,395 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 63 [2019-11-23 22:27:59,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:27:59,396 INFO L225 Difference]: With dead ends: 115 [2019-11-23 22:27:59,396 INFO L226 Difference]: Without dead ends: 73 [2019-11-23 22:27:59,397 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 22:27:59,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2019-11-23 22:27:59,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 64. [2019-11-23 22:27:59,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2019-11-23 22:27:59,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 71 transitions. [2019-11-23 22:27:59,405 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 71 transitions. Word has length 63 [2019-11-23 22:27:59,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:27:59,405 INFO L462 AbstractCegarLoop]: Abstraction has 64 states and 71 transitions. [2019-11-23 22:27:59,405 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 22:27:59,405 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 71 transitions. [2019-11-23 22:27:59,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2019-11-23 22:27:59,406 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:27:59,406 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 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] [2019-11-23 22:27:59,612 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:27:59,612 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:27:59,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:27:59,613 INFO L82 PathProgramCache]: Analyzing trace with hash 2078383843, now seen corresponding path program 1 times [2019-11-23 22:27:59,613 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:27:59,613 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618657433] [2019-11-23 22:27:59,614 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:27:59,631 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:27:59,631 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1194291936] [2019-11-23 22:27:59,631 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2019-11-23 22:27:59,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:27:59,699 INFO L255 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 22:27:59,700 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:27:59,719 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2019-11-23 22:27:59,721 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618657433] [2019-11-23 22:27:59,721 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:27:59,721 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194291936] [2019-11-23 22:27:59,721 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:27:59,721 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2019-11-23 22:27:59,722 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540182369] [2019-11-23 22:27:59,722 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-23 22:27:59,722 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:27:59,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-23 22:27:59,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 22:27:59,724 INFO L87 Difference]: Start difference. First operand 64 states and 71 transitions. Second operand 5 states. [2019-11-23 22:27:59,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:27:59,750 INFO L93 Difference]: Finished difference Result 124 states and 138 transitions. [2019-11-23 22:27:59,754 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-23 22:27:59,755 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 63 [2019-11-23 22:27:59,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:27:59,755 INFO L225 Difference]: With dead ends: 124 [2019-11-23 22:27:59,755 INFO L226 Difference]: Without dead ends: 67 [2019-11-23 22:27:59,756 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 22:27:59,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2019-11-23 22:27:59,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 66. [2019-11-23 22:27:59,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2019-11-23 22:27:59,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 73 transitions. [2019-11-23 22:27:59,766 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 73 transitions. Word has length 63 [2019-11-23 22:27:59,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:27:59,766 INFO L462 AbstractCegarLoop]: Abstraction has 66 states and 73 transitions. [2019-11-23 22:27:59,766 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-23 22:27:59,766 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 73 transitions. [2019-11-23 22:27:59,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2019-11-23 22:27:59,767 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:27:59,767 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:27:59,979 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:27:59,979 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:27:59,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:27:59,980 INFO L82 PathProgramCache]: Analyzing trace with hash -1300385375, now seen corresponding path program 2 times [2019-11-23 22:27:59,980 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:27:59,981 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545518973] [2019-11-23 22:27:59,981 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:27:59,994 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:27:59,995 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2064817291] [2019-11-23 22:27:59,995 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:28:00,061 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 22:28:00,061 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:28:00,062 INFO L255 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-23 22:28:00,064 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:28:00,110 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2019-11-23 22:28:00,110 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545518973] [2019-11-23 22:28:00,110 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:28:00,111 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064817291] [2019-11-23 22:28:00,111 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:28:00,111 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2019-11-23 22:28:00,111 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112731942] [2019-11-23 22:28:00,112 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-23 22:28:00,112 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:28:00,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-23 22:28:00,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-23 22:28:00,112 INFO L87 Difference]: Start difference. First operand 66 states and 73 transitions. Second operand 6 states. [2019-11-23 22:28:00,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:28:00,138 INFO L93 Difference]: Finished difference Result 126 states and 140 transitions. [2019-11-23 22:28:00,139 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-23 22:28:00,139 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 65 [2019-11-23 22:28:00,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:28:00,140 INFO L225 Difference]: With dead ends: 126 [2019-11-23 22:28:00,140 INFO L226 Difference]: Without dead ends: 69 [2019-11-23 22:28:00,143 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-23 22:28:00,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2019-11-23 22:28:00,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 68. [2019-11-23 22:28:00,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2019-11-23 22:28:00,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 75 transitions. [2019-11-23 22:28:00,153 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 75 transitions. Word has length 65 [2019-11-23 22:28:00,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:28:00,153 INFO L462 AbstractCegarLoop]: Abstraction has 68 states and 75 transitions. [2019-11-23 22:28:00,153 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-23 22:28:00,153 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 75 transitions. [2019-11-23 22:28:00,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2019-11-23 22:28:00,158 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:28:00,159 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:28:00,359 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:28:00,359 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:28:00,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:28:00,360 INFO L82 PathProgramCache]: Analyzing trace with hash -1302328097, now seen corresponding path program 3 times [2019-11-23 22:28:00,360 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:28:00,361 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88574036] [2019-11-23 22:28:00,361 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:28:00,374 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:28:00,374 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1736250734] [2019-11-23 22:28:00,374 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2019-11-23 22:28:00,507 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-11-23 22:28:00,507 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:28:00,508 INFO L255 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 22:28:00,510 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:28:00,528 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2019-11-23 22:28:00,529 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88574036] [2019-11-23 22:28:00,529 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:28:00,529 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1736250734] [2019-11-23 22:28:00,529 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:28:00,529 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2019-11-23 22:28:00,530 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486875130] [2019-11-23 22:28:00,530 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-23 22:28:00,530 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:28:00,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-23 22:28:00,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 22:28:00,531 INFO L87 Difference]: Start difference. First operand 68 states and 75 transitions. Second operand 5 states. [2019-11-23 22:28:00,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:28:00,610 INFO L93 Difference]: Finished difference Result 126 states and 146 transitions. [2019-11-23 22:28:00,610 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-23 22:28:00,610 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 67 [2019-11-23 22:28:00,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:28:00,613 INFO L225 Difference]: With dead ends: 126 [2019-11-23 22:28:00,613 INFO L226 Difference]: Without dead ends: 83 [2019-11-23 22:28:00,614 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 22:28:00,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2019-11-23 22:28:00,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 77. [2019-11-23 22:28:00,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2019-11-23 22:28:00,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 87 transitions. [2019-11-23 22:28:00,620 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 87 transitions. Word has length 67 [2019-11-23 22:28:00,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:28:00,621 INFO L462 AbstractCegarLoop]: Abstraction has 77 states and 87 transitions. [2019-11-23 22:28:00,621 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-23 22:28:00,621 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 87 transitions. [2019-11-23 22:28:00,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2019-11-23 22:28:00,622 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:28:00,622 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 4, 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] [2019-11-23 22:28:00,826 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:28:00,826 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:28:00,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:28:00,827 INFO L82 PathProgramCache]: Analyzing trace with hash -153484414, now seen corresponding path program 4 times [2019-11-23 22:28:00,827 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:28:00,827 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24285638] [2019-11-23 22:28:00,827 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:28:00,841 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:28:00,841 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2067616559] [2019-11-23 22:28:00,842 INFO L92 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 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 [2019-11-23 22:28:00,909 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 22:28:00,909 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:28:00,910 INFO L255 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-23 22:28:00,911 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:28:00,939 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 21 proven. 7 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2019-11-23 22:28:00,939 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24285638] [2019-11-23 22:28:00,939 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:28:00,939 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067616559] [2019-11-23 22:28:00,940 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:28:00,940 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2019-11-23 22:28:00,940 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118118799] [2019-11-23 22:28:00,940 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-23 22:28:00,940 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:28:00,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-23 22:28:00,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-23 22:28:00,941 INFO L87 Difference]: Start difference. First operand 77 states and 87 transitions. Second operand 6 states. [2019-11-23 22:28:01,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:28:01,036 INFO L93 Difference]: Finished difference Result 141 states and 166 transitions. [2019-11-23 22:28:01,036 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-23 22:28:01,036 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 76 [2019-11-23 22:28:01,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:28:01,037 INFO L225 Difference]: With dead ends: 141 [2019-11-23 22:28:01,037 INFO L226 Difference]: Without dead ends: 92 [2019-11-23 22:28:01,038 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-23 22:28:01,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2019-11-23 22:28:01,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 86. [2019-11-23 22:28:01,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2019-11-23 22:28:01,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 99 transitions. [2019-11-23 22:28:01,044 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 99 transitions. Word has length 76 [2019-11-23 22:28:01,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:28:01,044 INFO L462 AbstractCegarLoop]: Abstraction has 86 states and 99 transitions. [2019-11-23 22:28:01,044 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-23 22:28:01,044 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 99 transitions. [2019-11-23 22:28:01,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2019-11-23 22:28:01,045 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:28:01,045 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:28:01,248 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:28:01,249 INFO L410 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:28:01,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:28:01,249 INFO L82 PathProgramCache]: Analyzing trace with hash -1331355841, now seen corresponding path program 5 times [2019-11-23 22:28:01,250 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:28:01,250 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308549256] [2019-11-23 22:28:01,250 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:28:01,268 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:28:01,270 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1934210601] [2019-11-23 22:28:01,270 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:28:01,351 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2019-11-23 22:28:01,351 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:28:01,353 INFO L255 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-23 22:28:01,354 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:28:01,390 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 29 proven. 15 refuted. 0 times theorem prover too weak. 134 trivial. 0 not checked. [2019-11-23 22:28:01,390 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308549256] [2019-11-23 22:28:01,390 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:28:01,390 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934210601] [2019-11-23 22:28:01,390 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:28:01,391 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2019-11-23 22:28:01,391 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645101842] [2019-11-23 22:28:01,391 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-23 22:28:01,391 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:28:01,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-23 22:28:01,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-23 22:28:01,392 INFO L87 Difference]: Start difference. First operand 86 states and 99 transitions. Second operand 6 states. [2019-11-23 22:28:01,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:28:01,489 INFO L93 Difference]: Finished difference Result 164 states and 192 transitions. [2019-11-23 22:28:01,489 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-23 22:28:01,490 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 85 [2019-11-23 22:28:01,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:28:01,491 INFO L225 Difference]: With dead ends: 164 [2019-11-23 22:28:01,491 INFO L226 Difference]: Without dead ends: 98 [2019-11-23 22:28:01,491 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-23 22:28:01,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2019-11-23 22:28:01,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 95. [2019-11-23 22:28:01,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2019-11-23 22:28:01,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 108 transitions. [2019-11-23 22:28:01,498 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 108 transitions. Word has length 85 [2019-11-23 22:28:01,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:28:01,498 INFO L462 AbstractCegarLoop]: Abstraction has 95 states and 108 transitions. [2019-11-23 22:28:01,498 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-23 22:28:01,499 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 108 transitions. [2019-11-23 22:28:01,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2019-11-23 22:28:01,500 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:28:01,500 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:28:01,712 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:28:01,713 INFO L410 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:28:01,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:28:01,713 INFO L82 PathProgramCache]: Analyzing trace with hash -2126533668, now seen corresponding path program 6 times [2019-11-23 22:28:01,713 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:28:01,714 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769173814] [2019-11-23 22:28:01,714 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:28:01,726 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:28:01,727 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [433362076] [2019-11-23 22:28:01,727 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 [2019-11-23 22:28:02,075 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-11-23 22:28:02,076 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:28:02,077 INFO L255 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-23 22:28:02,079 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:28:02,103 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 226 trivial. 0 not checked. [2019-11-23 22:28:02,104 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769173814] [2019-11-23 22:28:02,104 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:28:02,104 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433362076] [2019-11-23 22:28:02,104 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:28:02,104 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2019-11-23 22:28:02,105 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717445381] [2019-11-23 22:28:02,105 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-23 22:28:02,105 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:28:02,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-23 22:28:02,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-23 22:28:02,106 INFO L87 Difference]: Start difference. First operand 95 states and 108 transitions. Second operand 6 states. [2019-11-23 22:28:02,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:28:02,134 INFO L93 Difference]: Finished difference Result 126 states and 143 transitions. [2019-11-23 22:28:02,134 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-23 22:28:02,134 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 94 [2019-11-23 22:28:02,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:28:02,135 INFO L225 Difference]: With dead ends: 126 [2019-11-23 22:28:02,135 INFO L226 Difference]: Without dead ends: 98 [2019-11-23 22:28:02,136 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-23 22:28:02,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2019-11-23 22:28:02,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 97. [2019-11-23 22:28:02,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2019-11-23 22:28:02,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 110 transitions. [2019-11-23 22:28:02,140 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 110 transitions. Word has length 94 [2019-11-23 22:28:02,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:28:02,140 INFO L462 AbstractCegarLoop]: Abstraction has 97 states and 110 transitions. [2019-11-23 22:28:02,140 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-23 22:28:02,140 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 110 transitions. [2019-11-23 22:28:02,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2019-11-23 22:28:02,141 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:28:02,141 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:28:02,341 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:28:02,342 INFO L410 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:28:02,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:28:02,342 INFO L82 PathProgramCache]: Analyzing trace with hash -1710600994, now seen corresponding path program 7 times [2019-11-23 22:28:02,343 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:28:02,343 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562408576] [2019-11-23 22:28:02,343 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:28:02,355 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:28:02,356 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2141654008] [2019-11-23 22:28:02,356 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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 [2019-11-23 22:28:02,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:28:02,422 INFO L255 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-23 22:28:02,424 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:28:02,467 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 226 trivial. 0 not checked. [2019-11-23 22:28:02,468 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562408576] [2019-11-23 22:28:02,468 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:28:02,468 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141654008] [2019-11-23 22:28:02,468 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:28:02,469 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2019-11-23 22:28:02,469 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113509816] [2019-11-23 22:28:02,469 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-23 22:28:02,469 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:28:02,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-23 22:28:02,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-11-23 22:28:02,470 INFO L87 Difference]: Start difference. First operand 97 states and 110 transitions. Second operand 7 states. [2019-11-23 22:28:02,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:28:02,498 INFO L93 Difference]: Finished difference Result 186 states and 212 transitions. [2019-11-23 22:28:02,498 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-23 22:28:02,498 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 96 [2019-11-23 22:28:02,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:28:02,499 INFO L225 Difference]: With dead ends: 186 [2019-11-23 22:28:02,499 INFO L226 Difference]: Without dead ends: 100 [2019-11-23 22:28:02,500 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-11-23 22:28:02,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2019-11-23 22:28:02,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 99. [2019-11-23 22:28:02,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2019-11-23 22:28:02,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 112 transitions. [2019-11-23 22:28:02,505 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 112 transitions. Word has length 96 [2019-11-23 22:28:02,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:28:02,505 INFO L462 AbstractCegarLoop]: Abstraction has 99 states and 112 transitions. [2019-11-23 22:28:02,505 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-23 22:28:02,505 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 112 transitions. [2019-11-23 22:28:02,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2019-11-23 22:28:02,506 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:28:02,506 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:28:02,711 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:28:02,711 INFO L410 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:28:02,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:28:02,711 INFO L82 PathProgramCache]: Analyzing trace with hash 1078725088, now seen corresponding path program 8 times [2019-11-23 22:28:02,712 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:28:02,712 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117985410] [2019-11-23 22:28:02,712 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:28:02,728 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:28:02,729 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1507958672] [2019-11-23 22:28:02,729 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:28:02,807 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 22:28:02,807 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:28:02,808 INFO L255 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-23 22:28:02,809 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:28:02,860 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 226 trivial. 0 not checked. [2019-11-23 22:28:02,861 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117985410] [2019-11-23 22:28:02,861 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:28:02,861 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1507958672] [2019-11-23 22:28:02,861 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:28:02,861 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2019-11-23 22:28:02,861 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362799338] [2019-11-23 22:28:02,862 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-23 22:28:02,862 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:28:02,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-23 22:28:02,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-11-23 22:28:02,862 INFO L87 Difference]: Start difference. First operand 99 states and 112 transitions. Second operand 8 states. [2019-11-23 22:28:02,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:28:02,888 INFO L93 Difference]: Finished difference Result 188 states and 214 transitions. [2019-11-23 22:28:02,890 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-23 22:28:02,890 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 98 [2019-11-23 22:28:02,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:28:02,891 INFO L225 Difference]: With dead ends: 188 [2019-11-23 22:28:02,891 INFO L226 Difference]: Without dead ends: 102 [2019-11-23 22:28:02,892 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-11-23 22:28:02,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2019-11-23 22:28:02,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 101. [2019-11-23 22:28:02,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2019-11-23 22:28:02,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 114 transitions. [2019-11-23 22:28:02,896 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 114 transitions. Word has length 98 [2019-11-23 22:28:02,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:28:02,896 INFO L462 AbstractCegarLoop]: Abstraction has 101 states and 114 transitions. [2019-11-23 22:28:02,896 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-23 22:28:02,896 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 114 transitions. [2019-11-23 22:28:02,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2019-11-23 22:28:02,897 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:28:02,898 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 6, 6, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:28:03,101 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:28:03,101 INFO L410 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:28:03,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:28:03,102 INFO L82 PathProgramCache]: Analyzing trace with hash 1561497186, now seen corresponding path program 9 times [2019-11-23 22:28:03,102 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:28:03,102 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413118624] [2019-11-23 22:28:03,102 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:28:03,115 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:28:03,115 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1444277057] [2019-11-23 22:28:03,115 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2019-11-23 22:28:03,284 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-11-23 22:28:03,285 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:28:03,286 INFO L255 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-23 22:28:03,288 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:28:03,325 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 246 trivial. 0 not checked. [2019-11-23 22:28:03,325 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413118624] [2019-11-23 22:28:03,325 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:28:03,325 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1444277057] [2019-11-23 22:28:03,325 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:28:03,326 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2019-11-23 22:28:03,326 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215649401] [2019-11-23 22:28:03,326 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-23 22:28:03,326 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:28:03,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-23 22:28:03,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-11-23 22:28:03,327 INFO L87 Difference]: Start difference. First operand 101 states and 114 transitions. Second operand 7 states. [2019-11-23 22:28:03,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:28:03,363 INFO L93 Difference]: Finished difference Result 132 states and 149 transitions. [2019-11-23 22:28:03,363 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-23 22:28:03,363 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 100 [2019-11-23 22:28:03,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:28:03,364 INFO L225 Difference]: With dead ends: 132 [2019-11-23 22:28:03,364 INFO L226 Difference]: Without dead ends: 104 [2019-11-23 22:28:03,365 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-11-23 22:28:03,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2019-11-23 22:28:03,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 103. [2019-11-23 22:28:03,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2019-11-23 22:28:03,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 116 transitions. [2019-11-23 22:28:03,372 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 116 transitions. Word has length 100 [2019-11-23 22:28:03,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:28:03,372 INFO L462 AbstractCegarLoop]: Abstraction has 103 states and 116 transitions. [2019-11-23 22:28:03,372 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-23 22:28:03,372 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 116 transitions. [2019-11-23 22:28:03,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2019-11-23 22:28:03,373 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:28:03,374 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 6, 6, 5, 5, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:28:03,585 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:28:03,586 INFO L410 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:28:03,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:28:03,586 INFO L82 PathProgramCache]: Analyzing trace with hash -860969500, now seen corresponding path program 10 times [2019-11-23 22:28:03,587 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:28:03,587 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393241762] [2019-11-23 22:28:03,587 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:28:03,600 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:28:03,601 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1820225441] [2019-11-23 22:28:03,601 INFO L92 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 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 [2019-11-23 22:28:03,691 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 22:28:03,691 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:28:03,692 INFO L255 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-23 22:28:03,695 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:28:03,737 INFO L134 CoverageAnalysis]: Checked inductivity of 271 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 246 trivial. 0 not checked. [2019-11-23 22:28:03,738 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393241762] [2019-11-23 22:28:03,738 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:28:03,738 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1820225441] [2019-11-23 22:28:03,738 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:28:03,738 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2019-11-23 22:28:03,739 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053656995] [2019-11-23 22:28:03,739 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-23 22:28:03,739 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:28:03,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-23 22:28:03,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-11-23 22:28:03,740 INFO L87 Difference]: Start difference. First operand 103 states and 116 transitions. Second operand 8 states. [2019-11-23 22:28:03,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:28:03,776 INFO L93 Difference]: Finished difference Result 134 states and 151 transitions. [2019-11-23 22:28:03,778 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-23 22:28:03,778 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 102 [2019-11-23 22:28:03,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:28:03,779 INFO L225 Difference]: With dead ends: 134 [2019-11-23 22:28:03,779 INFO L226 Difference]: Without dead ends: 106 [2019-11-23 22:28:03,780 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-11-23 22:28:03,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2019-11-23 22:28:03,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 105. [2019-11-23 22:28:03,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2019-11-23 22:28:03,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 118 transitions. [2019-11-23 22:28:03,785 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 118 transitions. Word has length 102 [2019-11-23 22:28:03,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:28:03,786 INFO L462 AbstractCegarLoop]: Abstraction has 105 states and 118 transitions. [2019-11-23 22:28:03,786 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-23 22:28:03,786 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 118 transitions. [2019-11-23 22:28:03,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2019-11-23 22:28:03,787 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:28:03,787 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:28:03,987 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:28:03,988 INFO L410 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:28:03,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:28:03,989 INFO L82 PathProgramCache]: Analyzing trace with hash -979180314, now seen corresponding path program 11 times [2019-11-23 22:28:03,989 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:28:03,989 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419627286] [2019-11-23 22:28:03,989 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:28:04,000 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:28:04,000 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1133554073] [2019-11-23 22:28:04,001 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:28:04,205 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2019-11-23 22:28:04,205 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:28:04,207 INFO L255 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-23 22:28:04,208 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:28:04,267 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 37 proven. 26 refuted. 0 times theorem prover too weak. 219 trivial. 0 not checked. [2019-11-23 22:28:04,268 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419627286] [2019-11-23 22:28:04,268 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:28:04,268 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1133554073] [2019-11-23 22:28:04,268 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:28:04,268 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2019-11-23 22:28:04,268 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622316076] [2019-11-23 22:28:04,268 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-23 22:28:04,269 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:28:04,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-23 22:28:04,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-11-23 22:28:04,269 INFO L87 Difference]: Start difference. First operand 105 states and 118 transitions. Second operand 7 states. [2019-11-23 22:28:04,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:28:04,362 INFO L93 Difference]: Finished difference Result 195 states and 223 transitions. [2019-11-23 22:28:04,363 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-23 22:28:04,363 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 104 [2019-11-23 22:28:04,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:28:04,364 INFO L225 Difference]: With dead ends: 195 [2019-11-23 22:28:04,364 INFO L226 Difference]: Without dead ends: 117 [2019-11-23 22:28:04,365 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-11-23 22:28:04,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2019-11-23 22:28:04,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 114. [2019-11-23 22:28:04,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2019-11-23 22:28:04,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 127 transitions. [2019-11-23 22:28:04,371 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 127 transitions. Word has length 104 [2019-11-23 22:28:04,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:28:04,371 INFO L462 AbstractCegarLoop]: Abstraction has 114 states and 127 transitions. [2019-11-23 22:28:04,371 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-23 22:28:04,372 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 127 transitions. [2019-11-23 22:28:04,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2019-11-23 22:28:04,373 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:28:04,373 INFO L410 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 6, 6, 6, 6, 5, 5, 5, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:28:04,577 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:28:04,577 INFO L410 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:28:04,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:28:04,577 INFO L82 PathProgramCache]: Analyzing trace with hash -1509437355, now seen corresponding path program 12 times [2019-11-23 22:28:04,577 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:28:04,577 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431663929] [2019-11-23 22:28:04,578 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:28:04,595 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:28:04,596 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [916230594] [2019-11-23 22:28:04,596 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 [2019-11-23 22:28:15,947 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2019-11-23 22:28:15,947 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:28:15,948 INFO L255 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-23 22:28:15,950 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:28:16,004 INFO L134 CoverageAnalysis]: Checked inductivity of 348 backedges. 45 proven. 40 refuted. 0 times theorem prover too weak. 263 trivial. 0 not checked. [2019-11-23 22:28:16,004 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431663929] [2019-11-23 22:28:16,004 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:28:16,005 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [916230594] [2019-11-23 22:28:16,005 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:28:16,005 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2019-11-23 22:28:16,005 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775951879] [2019-11-23 22:28:16,005 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-23 22:28:16,005 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:28:16,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-23 22:28:16,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-11-23 22:28:16,006 INFO L87 Difference]: Start difference. First operand 114 states and 127 transitions. Second operand 8 states. [2019-11-23 22:28:16,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:28:16,114 INFO L93 Difference]: Finished difference Result 210 states and 238 transitions. [2019-11-23 22:28:16,114 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-23 22:28:16,114 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 113 [2019-11-23 22:28:16,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:28:16,115 INFO L225 Difference]: With dead ends: 210 [2019-11-23 22:28:16,115 INFO L226 Difference]: Without dead ends: 126 [2019-11-23 22:28:16,116 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-11-23 22:28:16,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2019-11-23 22:28:16,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 123. [2019-11-23 22:28:16,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2019-11-23 22:28:16,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 136 transitions. [2019-11-23 22:28:16,121 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 136 transitions. Word has length 113 [2019-11-23 22:28:16,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:28:16,121 INFO L462 AbstractCegarLoop]: Abstraction has 123 states and 136 transitions. [2019-11-23 22:28:16,121 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-23 22:28:16,121 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 136 transitions. [2019-11-23 22:28:16,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2019-11-23 22:28:16,122 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:28:16,123 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 6, 6, 6, 6, 6, 6, 6, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:28:16,323 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:28:16,323 INFO L410 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:28:16,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:28:16,324 INFO L82 PathProgramCache]: Analyzing trace with hash -1377065658, now seen corresponding path program 13 times [2019-11-23 22:28:16,324 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:28:16,324 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557246699] [2019-11-23 22:28:16,325 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:28:16,335 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:28:16,335 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2088405259] [2019-11-23 22:28:16,335 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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 [2019-11-23 22:28:16,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:28:16,415 INFO L255 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-23 22:28:16,417 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:28:16,467 INFO L134 CoverageAnalysis]: Checked inductivity of 423 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 387 trivial. 0 not checked. [2019-11-23 22:28:16,468 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557246699] [2019-11-23 22:28:16,468 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:28:16,468 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2088405259] [2019-11-23 22:28:16,468 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:28:16,468 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2019-11-23 22:28:16,469 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370413796] [2019-11-23 22:28:16,469 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-23 22:28:16,469 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:28:16,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-23 22:28:16,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-11-23 22:28:16,470 INFO L87 Difference]: Start difference. First operand 123 states and 136 transitions. Second operand 9 states. [2019-11-23 22:28:16,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:28:16,504 INFO L93 Difference]: Finished difference Result 234 states and 260 transitions. [2019-11-23 22:28:16,506 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-23 22:28:16,507 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 122 [2019-11-23 22:28:16,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:28:16,507 INFO L225 Difference]: With dead ends: 234 [2019-11-23 22:28:16,508 INFO L226 Difference]: Without dead ends: 126 [2019-11-23 22:28:16,508 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-11-23 22:28:16,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2019-11-23 22:28:16,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 125. [2019-11-23 22:28:16,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2019-11-23 22:28:16,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 138 transitions. [2019-11-23 22:28:16,513 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 138 transitions. Word has length 122 [2019-11-23 22:28:16,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:28:16,513 INFO L462 AbstractCegarLoop]: Abstraction has 125 states and 138 transitions. [2019-11-23 22:28:16,513 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-23 22:28:16,513 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 138 transitions. [2019-11-23 22:28:16,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2019-11-23 22:28:16,514 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:28:16,514 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 7, 7, 6, 6, 6, 6, 6, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:28:16,717 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:28:16,718 INFO L410 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:28:16,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:28:16,718 INFO L82 PathProgramCache]: Analyzing trace with hash 1626162120, now seen corresponding path program 14 times [2019-11-23 22:28:16,719 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:28:16,719 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358353008] [2019-11-23 22:28:16,719 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:28:16,729 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:28:16,729 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1515618901] [2019-11-23 22:28:16,729 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:28:16,802 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 22:28:16,803 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:28:16,803 INFO L255 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-23 22:28:16,805 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:28:16,865 INFO L134 CoverageAnalysis]: Checked inductivity of 436 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 387 trivial. 0 not checked. [2019-11-23 22:28:16,865 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358353008] [2019-11-23 22:28:16,865 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:28:16,865 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1515618901] [2019-11-23 22:28:16,865 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:28:16,865 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2019-11-23 22:28:16,866 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351554550] [2019-11-23 22:28:16,866 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-23 22:28:16,866 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:28:16,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-23 22:28:16,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-11-23 22:28:16,867 INFO L87 Difference]: Start difference. First operand 125 states and 138 transitions. Second operand 10 states. [2019-11-23 22:28:16,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:28:16,896 INFO L93 Difference]: Finished difference Result 236 states and 262 transitions. [2019-11-23 22:28:16,897 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-23 22:28:16,897 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 124 [2019-11-23 22:28:16,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:28:16,898 INFO L225 Difference]: With dead ends: 236 [2019-11-23 22:28:16,898 INFO L226 Difference]: Without dead ends: 128 [2019-11-23 22:28:16,898 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-11-23 22:28:16,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2019-11-23 22:28:16,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 127. [2019-11-23 22:28:16,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2019-11-23 22:28:16,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 140 transitions. [2019-11-23 22:28:16,903 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 140 transitions. Word has length 124 [2019-11-23 22:28:16,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:28:16,904 INFO L462 AbstractCegarLoop]: Abstraction has 127 states and 140 transitions. [2019-11-23 22:28:16,904 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-23 22:28:16,904 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 140 transitions. [2019-11-23 22:28:16,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2019-11-23 22:28:16,905 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:28:16,905 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 8, 8, 6, 6, 6, 6, 6, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:28:17,109 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:28:17,109 INFO L410 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:28:17,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:28:17,109 INFO L82 PathProgramCache]: Analyzing trace with hash 1510033866, now seen corresponding path program 15 times [2019-11-23 22:28:17,109 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:28:17,109 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432102648] [2019-11-23 22:28:17,110 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:28:17,119 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:28:17,120 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1700333272] [2019-11-23 22:28:17,120 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2019-11-23 22:28:18,493 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2019-11-23 22:28:18,493 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:28:18,495 INFO L255 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-23 22:28:18,496 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:28:18,532 INFO L134 CoverageAnalysis]: Checked inductivity of 451 backedges. 62 proven. 15 refuted. 0 times theorem prover too weak. 374 trivial. 0 not checked. [2019-11-23 22:28:18,533 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432102648] [2019-11-23 22:28:18,533 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:28:18,533 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1700333272] [2019-11-23 22:28:18,533 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:28:18,533 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2019-11-23 22:28:18,533 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127354419] [2019-11-23 22:28:18,533 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-23 22:28:18,533 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:28:18,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-23 22:28:18,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-11-23 22:28:18,534 INFO L87 Difference]: Start difference. First operand 127 states and 140 transitions. Second operand 7 states. [2019-11-23 22:28:18,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:28:18,648 INFO L93 Difference]: Finished difference Result 221 states and 251 transitions. [2019-11-23 22:28:18,649 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-23 22:28:18,649 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 126 [2019-11-23 22:28:18,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:28:18,650 INFO L225 Difference]: With dead ends: 221 [2019-11-23 22:28:18,650 INFO L226 Difference]: Without dead ends: 142 [2019-11-23 22:28:18,650 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-11-23 22:28:18,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2019-11-23 22:28:18,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 136. [2019-11-23 22:28:18,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2019-11-23 22:28:18,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 152 transitions. [2019-11-23 22:28:18,656 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 152 transitions. Word has length 126 [2019-11-23 22:28:18,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:28:18,656 INFO L462 AbstractCegarLoop]: Abstraction has 136 states and 152 transitions. [2019-11-23 22:28:18,656 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-23 22:28:18,656 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 152 transitions. [2019-11-23 22:28:18,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2019-11-23 22:28:18,657 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:28:18,657 INFO L410 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 8, 8, 6, 6, 6, 6, 6, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:28:18,858 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:28:18,858 INFO L410 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:28:18,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:28:18,859 INFO L82 PathProgramCache]: Analyzing trace with hash -478866573, now seen corresponding path program 16 times [2019-11-23 22:28:18,859 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:28:18,860 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800967472] [2019-11-23 22:28:18,860 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:28:18,881 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:28:18,882 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [364941640] [2019-11-23 22:28:18,882 INFO L92 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 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 [2019-11-23 22:28:19,000 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 22:28:19,001 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:28:19,002 INFO L255 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-23 22:28:19,005 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:28:19,129 INFO L134 CoverageAnalysis]: Checked inductivity of 535 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 471 trivial. 0 not checked. [2019-11-23 22:28:19,129 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800967472] [2019-11-23 22:28:19,129 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:28:19,130 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [364941640] [2019-11-23 22:28:19,130 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:28:19,130 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2019-11-23 22:28:19,130 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271091469] [2019-11-23 22:28:19,130 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-23 22:28:19,131 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:28:19,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-23 22:28:19,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-11-23 22:28:19,131 INFO L87 Difference]: Start difference. First operand 136 states and 152 transitions. Second operand 11 states. [2019-11-23 22:28:19,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:28:19,171 INFO L93 Difference]: Finished difference Result 256 states and 288 transitions. [2019-11-23 22:28:19,171 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-23 22:28:19,172 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 135 [2019-11-23 22:28:19,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:28:19,173 INFO L225 Difference]: With dead ends: 256 [2019-11-23 22:28:19,173 INFO L226 Difference]: Without dead ends: 139 [2019-11-23 22:28:19,174 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-11-23 22:28:19,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2019-11-23 22:28:19,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 138. [2019-11-23 22:28:19,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2019-11-23 22:28:19,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 154 transitions. [2019-11-23 22:28:19,182 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 154 transitions. Word has length 135 [2019-11-23 22:28:19,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:28:19,182 INFO L462 AbstractCegarLoop]: Abstraction has 138 states and 154 transitions. [2019-11-23 22:28:19,182 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-23 22:28:19,183 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 154 transitions. [2019-11-23 22:28:19,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2019-11-23 22:28:19,185 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:28:19,185 INFO L410 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 9, 9, 6, 6, 6, 6, 6, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:28:19,391 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:28:19,391 INFO L410 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:28:19,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:28:19,391 INFO L82 PathProgramCache]: Analyzing trace with hash 1864669233, now seen corresponding path program 17 times [2019-11-23 22:28:19,392 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:28:19,392 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109362549] [2019-11-23 22:28:19,392 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:28:19,406 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:28:19,406 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [128113087] [2019-11-23 22:28:19,406 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:28:19,801 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2019-11-23 22:28:19,801 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:28:19,803 INFO L255 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-23 22:28:19,804 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:28:19,851 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 73 proven. 57 refuted. 0 times theorem prover too weak. 422 trivial. 0 not checked. [2019-11-23 22:28:19,852 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109362549] [2019-11-23 22:28:19,852 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:28:19,852 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128113087] [2019-11-23 22:28:19,852 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:28:19,852 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2019-11-23 22:28:19,852 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964130274] [2019-11-23 22:28:19,853 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-23 22:28:19,853 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:28:19,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-23 22:28:19,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-11-23 22:28:19,853 INFO L87 Difference]: Start difference. First operand 138 states and 154 transitions. Second operand 9 states. [2019-11-23 22:28:19,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:28:19,969 INFO L93 Difference]: Finished difference Result 249 states and 283 transitions. [2019-11-23 22:28:19,970 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-23 22:28:19,970 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 137 [2019-11-23 22:28:19,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:28:19,971 INFO L225 Difference]: With dead ends: 249 [2019-11-23 22:28:19,971 INFO L226 Difference]: Without dead ends: 150 [2019-11-23 22:28:19,972 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-11-23 22:28:19,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2019-11-23 22:28:19,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 147. [2019-11-23 22:28:19,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2019-11-23 22:28:19,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 163 transitions. [2019-11-23 22:28:19,978 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 163 transitions. Word has length 137 [2019-11-23 22:28:19,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:28:19,978 INFO L462 AbstractCegarLoop]: Abstraction has 147 states and 163 transitions. [2019-11-23 22:28:19,978 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-23 22:28:19,978 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 163 transitions. [2019-11-23 22:28:19,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2019-11-23 22:28:19,979 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:28:19,980 INFO L410 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 9, 9, 7, 7, 7, 6, 6, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:28:20,183 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:28:20,184 INFO L410 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:28:20,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:28:20,184 INFO L82 PathProgramCache]: Analyzing trace with hash 332264690, now seen corresponding path program 18 times [2019-11-23 22:28:20,184 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:28:20,184 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650065315] [2019-11-23 22:28:20,185 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:28:20,196 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:28:20,196 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [276993230] [2019-11-23 22:28:20,196 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 [2019-11-23 22:28:23,995 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2019-11-23 22:28:23,995 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:28:23,997 INFO L255 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-23 22:28:23,998 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:28:24,047 INFO L134 CoverageAnalysis]: Checked inductivity of 645 backedges. 93 proven. 26 refuted. 0 times theorem prover too weak. 526 trivial. 0 not checked. [2019-11-23 22:28:24,048 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650065315] [2019-11-23 22:28:24,048 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:28:24,048 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276993230] [2019-11-23 22:28:24,048 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:28:24,048 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2019-11-23 22:28:24,048 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140471696] [2019-11-23 22:28:24,048 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-23 22:28:24,049 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:28:24,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-23 22:28:24,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-11-23 22:28:24,049 INFO L87 Difference]: Start difference. First operand 147 states and 163 transitions. Second operand 8 states. [2019-11-23 22:28:24,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:28:24,175 INFO L93 Difference]: Finished difference Result 253 states and 288 transitions. [2019-11-23 22:28:24,175 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-23 22:28:24,175 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 146 [2019-11-23 22:28:24,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:28:24,177 INFO L225 Difference]: With dead ends: 253 [2019-11-23 22:28:24,177 INFO L226 Difference]: Without dead ends: 162 [2019-11-23 22:28:24,178 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-11-23 22:28:24,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2019-11-23 22:28:24,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 156. [2019-11-23 22:28:24,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2019-11-23 22:28:24,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 175 transitions. [2019-11-23 22:28:24,196 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 175 transitions. Word has length 146 [2019-11-23 22:28:24,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:28:24,196 INFO L462 AbstractCegarLoop]: Abstraction has 156 states and 175 transitions. [2019-11-23 22:28:24,196 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-23 22:28:24,196 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 175 transitions. [2019-11-23 22:28:24,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2019-11-23 22:28:24,197 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:28:24,197 INFO L410 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 9, 9, 7, 7, 7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:28:24,402 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:28:24,402 INFO L410 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:28:24,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:28:24,403 INFO L82 PathProgramCache]: Analyzing trace with hash 1023035791, now seen corresponding path program 19 times [2019-11-23 22:28:24,403 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:28:24,403 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841426276] [2019-11-23 22:28:24,403 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:28:24,414 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:28:24,414 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [91504775] [2019-11-23 22:28:24,414 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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 [2019-11-23 22:28:24,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:28:24,497 INFO L255 TraceCheckSpWp]: Trace formula consists of 386 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-23 22:28:24,499 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:28:24,608 INFO L134 CoverageAnalysis]: Checked inductivity of 747 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 666 trivial. 0 not checked. [2019-11-23 22:28:24,609 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841426276] [2019-11-23 22:28:24,609 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:28:24,609 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91504775] [2019-11-23 22:28:24,609 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:28:24,610 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2019-11-23 22:28:24,610 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774055357] [2019-11-23 22:28:24,610 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-23 22:28:24,611 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:28:24,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-23 22:28:24,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-11-23 22:28:24,612 INFO L87 Difference]: Start difference. First operand 156 states and 175 transitions. Second operand 12 states. [2019-11-23 22:28:24,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:28:24,659 INFO L93 Difference]: Finished difference Result 294 states and 332 transitions. [2019-11-23 22:28:24,660 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-23 22:28:24,660 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 155 [2019-11-23 22:28:24,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:28:24,661 INFO L225 Difference]: With dead ends: 294 [2019-11-23 22:28:24,662 INFO L226 Difference]: Without dead ends: 159 [2019-11-23 22:28:24,665 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-11-23 22:28:24,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2019-11-23 22:28:24,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 158. [2019-11-23 22:28:24,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2019-11-23 22:28:24,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 177 transitions. [2019-11-23 22:28:24,671 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 177 transitions. Word has length 155 [2019-11-23 22:28:24,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:28:24,672 INFO L462 AbstractCegarLoop]: Abstraction has 158 states and 177 transitions. [2019-11-23 22:28:24,672 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-23 22:28:24,672 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 177 transitions. [2019-11-23 22:28:24,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2019-11-23 22:28:24,673 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:28:24,674 INFO L410 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 10, 10, 7, 7, 7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:28:24,880 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:28:24,880 INFO L410 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:28:24,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:28:24,883 INFO L82 PathProgramCache]: Analyzing trace with hash 1397097293, now seen corresponding path program 20 times [2019-11-23 22:28:24,884 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:28:24,884 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454286941] [2019-11-23 22:28:24,884 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:28:24,898 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:28:24,899 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [176465018] [2019-11-23 22:28:24,899 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:28:25,031 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 22:28:25,032 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:28:25,034 INFO L255 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-23 22:28:25,038 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:28:25,143 INFO L134 CoverageAnalysis]: Checked inductivity of 766 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 666 trivial. 0 not checked. [2019-11-23 22:28:25,143 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454286941] [2019-11-23 22:28:25,143 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:28:25,143 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176465018] [2019-11-23 22:28:25,144 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:28:25,144 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2019-11-23 22:28:25,144 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762000348] [2019-11-23 22:28:25,144 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-23 22:28:25,144 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:28:25,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-23 22:28:25,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2019-11-23 22:28:25,146 INFO L87 Difference]: Start difference. First operand 158 states and 177 transitions. Second operand 13 states. [2019-11-23 22:28:25,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:28:25,180 INFO L93 Difference]: Finished difference Result 296 states and 334 transitions. [2019-11-23 22:28:25,180 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-23 22:28:25,180 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 157 [2019-11-23 22:28:25,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:28:25,181 INFO L225 Difference]: With dead ends: 296 [2019-11-23 22:28:25,181 INFO L226 Difference]: Without dead ends: 161 [2019-11-23 22:28:25,183 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2019-11-23 22:28:25,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2019-11-23 22:28:25,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 160. [2019-11-23 22:28:25,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2019-11-23 22:28:25,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 179 transitions. [2019-11-23 22:28:25,190 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 179 transitions. Word has length 157 [2019-11-23 22:28:25,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:28:25,191 INFO L462 AbstractCegarLoop]: Abstraction has 160 states and 179 transitions. [2019-11-23 22:28:25,191 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-23 22:28:25,191 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 179 transitions. [2019-11-23 22:28:25,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2019-11-23 22:28:25,192 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:28:25,192 INFO L410 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 11, 11, 7, 7, 7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:28:25,396 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:28:25,396 INFO L410 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:28:25,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:28:25,396 INFO L82 PathProgramCache]: Analyzing trace with hash 92947851, now seen corresponding path program 21 times [2019-11-23 22:28:25,396 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:28:25,397 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424567980] [2019-11-23 22:28:25,397 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:28:25,408 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:28:25,408 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [577809608] [2019-11-23 22:28:25,408 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2019-11-23 22:28:26,087 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2019-11-23 22:28:26,087 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:28:26,088 INFO L255 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-23 22:28:26,092 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:28:26,181 INFO L134 CoverageAnalysis]: Checked inductivity of 787 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 751 trivial. 0 not checked. [2019-11-23 22:28:26,182 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424567980] [2019-11-23 22:28:26,182 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:28:26,182 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577809608] [2019-11-23 22:28:26,182 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:28:26,182 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2019-11-23 22:28:26,182 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878348127] [2019-11-23 22:28:26,183 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-23 22:28:26,183 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:28:26,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-23 22:28:26,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-11-23 22:28:26,183 INFO L87 Difference]: Start difference. First operand 160 states and 179 transitions. Second operand 9 states. [2019-11-23 22:28:26,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:28:26,224 INFO L93 Difference]: Finished difference Result 206 states and 231 transitions. [2019-11-23 22:28:26,224 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-23 22:28:26,225 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 159 [2019-11-23 22:28:26,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:28:26,226 INFO L225 Difference]: With dead ends: 206 [2019-11-23 22:28:26,226 INFO L226 Difference]: Without dead ends: 163 [2019-11-23 22:28:26,226 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-11-23 22:28:26,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2019-11-23 22:28:26,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 162. [2019-11-23 22:28:26,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2019-11-23 22:28:26,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 181 transitions. [2019-11-23 22:28:26,232 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 181 transitions. Word has length 159 [2019-11-23 22:28:26,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:28:26,232 INFO L462 AbstractCegarLoop]: Abstraction has 162 states and 181 transitions. [2019-11-23 22:28:26,232 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-23 22:28:26,232 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 181 transitions. [2019-11-23 22:28:26,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2019-11-23 22:28:26,233 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:28:26,233 INFO L410 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 11, 11, 7, 7, 7, 7, 7, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:28:26,437 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:28:26,438 INFO L410 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:28:26,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:28:26,438 INFO L82 PathProgramCache]: Analyzing trace with hash -1416460151, now seen corresponding path program 22 times [2019-11-23 22:28:26,438 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:28:26,439 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249370751] [2019-11-23 22:28:26,439 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:28:26,450 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:28:26,451 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1255981953] [2019-11-23 22:28:26,451 INFO L92 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 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 [2019-11-23 22:28:26,537 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 22:28:26,538 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:28:26,539 INFO L255 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-23 22:28:26,541 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:28:26,666 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 679 trivial. 0 not checked. [2019-11-23 22:28:26,667 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249370751] [2019-11-23 22:28:26,667 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:28:26,667 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1255981953] [2019-11-23 22:28:26,668 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:28:26,668 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2019-11-23 22:28:26,668 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010486434] [2019-11-23 22:28:26,669 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-23 22:28:26,669 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:28:26,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-23 22:28:26,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2019-11-23 22:28:26,669 INFO L87 Difference]: Start difference. First operand 162 states and 181 transitions. Second operand 14 states. [2019-11-23 22:28:26,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:28:26,720 INFO L93 Difference]: Finished difference Result 302 states and 340 transitions. [2019-11-23 22:28:26,721 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-23 22:28:26,721 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 161 [2019-11-23 22:28:26,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:28:26,722 INFO L225 Difference]: With dead ends: 302 [2019-11-23 22:28:26,723 INFO L226 Difference]: Without dead ends: 165 [2019-11-23 22:28:26,723 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2019-11-23 22:28:26,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2019-11-23 22:28:26,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 164. [2019-11-23 22:28:26,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2019-11-23 22:28:26,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 183 transitions. [2019-11-23 22:28:26,729 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 183 transitions. Word has length 161 [2019-11-23 22:28:26,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:28:26,730 INFO L462 AbstractCegarLoop]: Abstraction has 164 states and 183 transitions. [2019-11-23 22:28:26,730 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-23 22:28:26,730 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 183 transitions. [2019-11-23 22:28:26,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2019-11-23 22:28:26,731 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:28:26,731 INFO L410 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 7, 7, 7, 7, 7, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:28:26,936 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:28:26,936 INFO L410 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:28:26,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:28:26,936 INFO L82 PathProgramCache]: Analyzing trace with hash 1095728071, now seen corresponding path program 23 times [2019-11-23 22:28:26,937 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:28:26,937 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880850523] [2019-11-23 22:28:26,937 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:28:26,949 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:28:26,949 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [715925278] [2019-11-23 22:28:26,949 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:28:28,605 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2019-11-23 22:28:28,606 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:28:28,608 INFO L255 TraceCheckSpWp]: Trace formula consists of 408 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-23 22:28:28,610 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:28:28,669 INFO L134 CoverageAnalysis]: Checked inductivity of 823 backedges. 107 proven. 77 refuted. 0 times theorem prover too weak. 639 trivial. 0 not checked. [2019-11-23 22:28:28,670 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880850523] [2019-11-23 22:28:28,670 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:28:28,670 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715925278] [2019-11-23 22:28:28,670 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:28:28,670 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2019-11-23 22:28:28,670 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715464585] [2019-11-23 22:28:28,671 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-23 22:28:28,671 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:28:28,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-23 22:28:28,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-11-23 22:28:28,671 INFO L87 Difference]: Start difference. First operand 164 states and 183 transitions. Second operand 10 states. [2019-11-23 22:28:28,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:28:28,799 INFO L93 Difference]: Finished difference Result 292 states and 332 transitions. [2019-11-23 22:28:28,800 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-23 22:28:28,800 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 163 [2019-11-23 22:28:28,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:28:28,801 INFO L225 Difference]: With dead ends: 292 [2019-11-23 22:28:28,801 INFO L226 Difference]: Without dead ends: 176 [2019-11-23 22:28:28,801 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-11-23 22:28:28,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2019-11-23 22:28:28,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 173. [2019-11-23 22:28:28,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2019-11-23 22:28:28,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 192 transitions. [2019-11-23 22:28:28,807 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 192 transitions. Word has length 163 [2019-11-23 22:28:28,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:28:28,808 INFO L462 AbstractCegarLoop]: Abstraction has 173 states and 192 transitions. [2019-11-23 22:28:28,808 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-23 22:28:28,808 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 192 transitions. [2019-11-23 22:28:28,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2019-11-23 22:28:28,809 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:28:28,809 INFO L410 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 12, 12, 8, 8, 8, 7, 7, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:28:29,009 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:28:29,010 INFO L410 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:28:29,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:28:29,010 INFO L82 PathProgramCache]: Analyzing trace with hash 527454420, now seen corresponding path program 24 times [2019-11-23 22:28:29,010 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:28:29,011 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644803933] [2019-11-23 22:28:29,011 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:28:29,022 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:28:29,023 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [928005869] [2019-11-23 22:28:29,023 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 [2019-11-23 22:28:43,496 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2019-11-23 22:28:43,497 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:28:43,501 INFO L255 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-23 22:28:43,504 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:28:43,594 INFO L134 CoverageAnalysis]: Checked inductivity of 934 backedges. 121 proven. 100 refuted. 0 times theorem prover too weak. 713 trivial. 0 not checked. [2019-11-23 22:28:43,595 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644803933] [2019-11-23 22:28:43,595 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:28:43,595 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928005869] [2019-11-23 22:28:43,595 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:28:43,595 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2019-11-23 22:28:43,595 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191221642] [2019-11-23 22:28:43,595 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-23 22:28:43,596 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:28:43,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-23 22:28:43,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-11-23 22:28:43,596 INFO L87 Difference]: Start difference. First operand 173 states and 192 transitions. Second operand 11 states. [2019-11-23 22:28:43,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:28:43,755 INFO L93 Difference]: Finished difference Result 307 states and 347 transitions. [2019-11-23 22:28:43,755 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-23 22:28:43,755 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 172 [2019-11-23 22:28:43,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:28:43,756 INFO L225 Difference]: With dead ends: 307 [2019-11-23 22:28:43,757 INFO L226 Difference]: Without dead ends: 185 [2019-11-23 22:28:43,757 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-11-23 22:28:43,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2019-11-23 22:28:43,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 182. [2019-11-23 22:28:43,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2019-11-23 22:28:43,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 201 transitions. [2019-11-23 22:28:43,764 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 201 transitions. Word has length 172 [2019-11-23 22:28:43,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:28:43,764 INFO L462 AbstractCegarLoop]: Abstraction has 182 states and 201 transitions. [2019-11-23 22:28:43,764 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-23 22:28:43,764 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 201 transitions. [2019-11-23 22:28:43,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2019-11-23 22:28:43,765 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:28:43,765 INFO L410 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 12, 12, 9, 9, 9, 7, 7, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:28:43,966 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:28:43,966 INFO L410 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:28:43,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:28:43,966 INFO L82 PathProgramCache]: Analyzing trace with hash -529064089, now seen corresponding path program 25 times [2019-11-23 22:28:43,967 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:28:43,967 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765671533] [2019-11-23 22:28:43,967 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:28:43,979 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:28:43,980 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1839190295] [2019-11-23 22:28:43,980 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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 [2019-11-23 22:28:44,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:28:44,074 INFO L255 TraceCheckSpWp]: Trace formula consists of 432 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-23 22:28:44,079 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:28:44,222 INFO L134 CoverageAnalysis]: Checked inductivity of 1054 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 910 trivial. 0 not checked. [2019-11-23 22:28:44,223 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765671533] [2019-11-23 22:28:44,223 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:28:44,223 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1839190295] [2019-11-23 22:28:44,223 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:28:44,223 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2019-11-23 22:28:44,224 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342293474] [2019-11-23 22:28:44,226 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-11-23 22:28:44,226 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:28:44,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-11-23 22:28:44,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2019-11-23 22:28:44,226 INFO L87 Difference]: Start difference. First operand 182 states and 201 transitions. Second operand 15 states. [2019-11-23 22:28:44,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:28:44,280 INFO L93 Difference]: Finished difference Result 340 states and 378 transitions. [2019-11-23 22:28:44,280 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-11-23 22:28:44,280 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 181 [2019-11-23 22:28:44,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:28:44,282 INFO L225 Difference]: With dead ends: 340 [2019-11-23 22:28:44,282 INFO L226 Difference]: Without dead ends: 185 [2019-11-23 22:28:44,283 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2019-11-23 22:28:44,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2019-11-23 22:28:44,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 184. [2019-11-23 22:28:44,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2019-11-23 22:28:44,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 203 transitions. [2019-11-23 22:28:44,290 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 203 transitions. Word has length 181 [2019-11-23 22:28:44,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:28:44,291 INFO L462 AbstractCegarLoop]: Abstraction has 184 states and 203 transitions. [2019-11-23 22:28:44,291 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-11-23 22:28:44,291 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 203 transitions. [2019-11-23 22:28:44,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2019-11-23 22:28:44,292 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:28:44,292 INFO L410 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 13, 13, 9, 9, 9, 7, 7, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:28:44,496 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:28:44,496 INFO L410 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:28:44,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:28:44,496 INFO L82 PathProgramCache]: Analyzing trace with hash 2118649765, now seen corresponding path program 26 times [2019-11-23 22:28:44,497 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:28:44,497 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11588350] [2019-11-23 22:28:44,497 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:28:44,509 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:28:44,509 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1476107892] [2019-11-23 22:28:44,509 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:28:44,621 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 22:28:44,621 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:28:44,622 INFO L255 TraceCheckSpWp]: Trace formula consists of 438 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-23 22:28:44,625 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:28:44,788 INFO L134 CoverageAnalysis]: Checked inductivity of 1079 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 910 trivial. 0 not checked. [2019-11-23 22:28:44,789 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11588350] [2019-11-23 22:28:44,789 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:28:44,789 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1476107892] [2019-11-23 22:28:44,789 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:28:44,789 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2019-11-23 22:28:44,789 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546765359] [2019-11-23 22:28:44,790 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-23 22:28:44,790 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:28:44,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-23 22:28:44,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2019-11-23 22:28:44,790 INFO L87 Difference]: Start difference. First operand 184 states and 203 transitions. Second operand 16 states. [2019-11-23 22:28:44,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:28:44,853 INFO L93 Difference]: Finished difference Result 342 states and 380 transitions. [2019-11-23 22:28:44,854 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-23 22:28:44,854 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 183 [2019-11-23 22:28:44,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:28:44,856 INFO L225 Difference]: With dead ends: 342 [2019-11-23 22:28:44,856 INFO L226 Difference]: Without dead ends: 187 [2019-11-23 22:28:44,857 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2019-11-23 22:28:44,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2019-11-23 22:28:44,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 186. [2019-11-23 22:28:44,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2019-11-23 22:28:44,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 205 transitions. [2019-11-23 22:28:44,865 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 205 transitions. Word has length 183 [2019-11-23 22:28:44,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:28:44,866 INFO L462 AbstractCegarLoop]: Abstraction has 186 states and 205 transitions. [2019-11-23 22:28:44,866 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-23 22:28:44,866 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 205 transitions. [2019-11-23 22:28:44,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2019-11-23 22:28:44,868 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:28:44,868 INFO L410 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 9, 9, 9, 7, 7, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:28:45,074 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:28:45,074 INFO L410 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:28:45,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:28:45,075 INFO L82 PathProgramCache]: Analyzing trace with hash -343943069, now seen corresponding path program 27 times [2019-11-23 22:28:45,075 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:28:45,075 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135541655] [2019-11-23 22:28:45,075 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:28:45,092 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:28:45,093 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [930408784] [2019-11-23 22:28:45,093 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2019-11-23 22:28:49,218 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2019-11-23 22:28:49,219 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:28:49,221 INFO L255 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-23 22:28:49,222 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:28:49,305 INFO L134 CoverageAnalysis]: Checked inductivity of 1106 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 1057 trivial. 0 not checked. [2019-11-23 22:28:49,305 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135541655] [2019-11-23 22:28:49,305 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:28:49,305 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [930408784] [2019-11-23 22:28:49,306 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:28:49,306 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2019-11-23 22:28:49,306 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860360501] [2019-11-23 22:28:49,306 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-23 22:28:49,306 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:28:49,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-23 22:28:49,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-11-23 22:28:49,306 INFO L87 Difference]: Start difference. First operand 186 states and 205 transitions. Second operand 10 states. [2019-11-23 22:28:49,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:28:49,343 INFO L93 Difference]: Finished difference Result 238 states and 263 transitions. [2019-11-23 22:28:49,344 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-23 22:28:49,344 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 185 [2019-11-23 22:28:49,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:28:49,345 INFO L225 Difference]: With dead ends: 238 [2019-11-23 22:28:49,345 INFO L226 Difference]: Without dead ends: 189 [2019-11-23 22:28:49,346 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-11-23 22:28:49,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2019-11-23 22:28:49,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 188. [2019-11-23 22:28:49,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2019-11-23 22:28:49,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 207 transitions. [2019-11-23 22:28:49,351 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 207 transitions. Word has length 185 [2019-11-23 22:28:49,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:28:49,352 INFO L462 AbstractCegarLoop]: Abstraction has 188 states and 207 transitions. [2019-11-23 22:28:49,352 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-23 22:28:49,352 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 207 transitions. [2019-11-23 22:28:49,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2019-11-23 22:28:49,353 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:28:49,353 INFO L410 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 9, 9, 9, 8, 8, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:28:49,557 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:28:49,557 INFO L410 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:28:49,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:28:49,558 INFO L82 PathProgramCache]: Analyzing trace with hash 545275617, now seen corresponding path program 28 times [2019-11-23 22:28:49,558 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:28:49,559 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341974532] [2019-11-23 22:28:49,559 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:28:49,571 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:28:49,571 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [463474695] [2019-11-23 22:28:49,571 INFO L92 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 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 [2019-11-23 22:28:49,659 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 22:28:49,660 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:28:49,661 INFO L255 TraceCheckSpWp]: Trace formula consists of 448 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-23 22:28:49,663 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:28:49,805 INFO L134 CoverageAnalysis]: Checked inductivity of 1121 backedges. 27 proven. 260 refuted. 0 times theorem prover too weak. 834 trivial. 0 not checked. [2019-11-23 22:28:49,805 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341974532] [2019-11-23 22:28:49,805 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:28:49,806 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463474695] [2019-11-23 22:28:49,806 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:28:49,806 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2019-11-23 22:28:49,806 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013891780] [2019-11-23 22:28:49,806 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-23 22:28:49,807 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:28:49,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-23 22:28:49,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2019-11-23 22:28:49,807 INFO L87 Difference]: Start difference. First operand 188 states and 207 transitions. Second operand 16 states. [2019-11-23 22:28:50,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:28:50,002 INFO L93 Difference]: Finished difference Result 366 states and 418 transitions. [2019-11-23 22:28:50,002 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-23 22:28:50,002 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 187 [2019-11-23 22:28:50,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:28:50,003 INFO L225 Difference]: With dead ends: 366 [2019-11-23 22:28:50,004 INFO L226 Difference]: Without dead ends: 236 [2019-11-23 22:28:50,004 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2019-11-23 22:28:50,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2019-11-23 22:28:50,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 233. [2019-11-23 22:28:50,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 233 states. [2019-11-23 22:28:50,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 252 transitions. [2019-11-23 22:28:50,011 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 252 transitions. Word has length 187 [2019-11-23 22:28:50,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:28:50,011 INFO L462 AbstractCegarLoop]: Abstraction has 233 states and 252 transitions. [2019-11-23 22:28:50,011 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-23 22:28:50,011 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 252 transitions. [2019-11-23 22:28:50,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2019-11-23 22:28:50,012 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:28:50,012 INFO L410 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 14, 14, 14, 14, 14, 8, 8, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:28:50,217 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:28:50,217 INFO L410 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:28:50,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:28:50,218 INFO L82 PathProgramCache]: Analyzing trace with hash 1211969018, now seen corresponding path program 29 times [2019-11-23 22:28:50,218 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:28:50,218 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577694388] [2019-11-23 22:28:50,218 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:28:50,231 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:28:50,231 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1579767562] [2019-11-23 22:28:50,231 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:28:52,319 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2019-11-23 22:28:52,319 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:28:52,325 INFO L255 TraceCheckSpWp]: Trace formula consists of 508 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-23 22:28:52,328 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:28:52,470 INFO L134 CoverageAnalysis]: Checked inductivity of 1856 backedges. 205 proven. 301 refuted. 0 times theorem prover too weak. 1350 trivial. 0 not checked. [2019-11-23 22:28:52,470 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577694388] [2019-11-23 22:28:52,470 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:28:52,470 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1579767562] [2019-11-23 22:28:52,471 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:28:52,471 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2019-11-23 22:28:52,471 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938302166] [2019-11-23 22:28:52,471 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-11-23 22:28:52,471 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:28:52,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-11-23 22:28:52,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2019-11-23 22:28:52,472 INFO L87 Difference]: Start difference. First operand 233 states and 252 transitions. Second operand 17 states. [2019-11-23 22:28:52,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:28:52,738 INFO L93 Difference]: Finished difference Result 405 states and 445 transitions. [2019-11-23 22:28:52,738 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-23 22:28:52,739 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 232 [2019-11-23 22:28:52,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:28:52,740 INFO L225 Difference]: With dead ends: 405 [2019-11-23 22:28:52,740 INFO L226 Difference]: Without dead ends: 245 [2019-11-23 22:28:52,741 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 216 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2019-11-23 22:28:52,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2019-11-23 22:28:52,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 242. [2019-11-23 22:28:52,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 242 states. [2019-11-23 22:28:52,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 261 transitions. [2019-11-23 22:28:52,748 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 261 transitions. Word has length 232 [2019-11-23 22:28:52,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:28:52,748 INFO L462 AbstractCegarLoop]: Abstraction has 242 states and 261 transitions. [2019-11-23 22:28:52,749 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-11-23 22:28:52,749 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 261 transitions. [2019-11-23 22:28:52,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2019-11-23 22:28:52,750 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:28:52,750 INFO L410 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 15, 15, 15, 14, 14, 8, 8, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:28:52,950 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:28:52,951 INFO L410 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:28:52,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:28:52,952 INFO L82 PathProgramCache]: Analyzing trace with hash -674227903, now seen corresponding path program 30 times [2019-11-23 22:28:52,952 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:28:52,952 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751693540] [2019-11-23 22:28:52,952 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:28:52,969 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:28:52,970 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1812177315] [2019-11-23 22:28:52,970 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 [2019-11-23 22:29:00,161 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2019-11-23 22:29:00,162 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:29:00,165 INFO L255 TraceCheckSpWp]: Trace formula consists of 448 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-23 22:29:00,167 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:29:00,254 INFO L134 CoverageAnalysis]: Checked inductivity of 2030 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 1966 trivial. 0 not checked. [2019-11-23 22:29:00,254 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751693540] [2019-11-23 22:29:00,254 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:29:00,254 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1812177315] [2019-11-23 22:29:00,257 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:29:00,257 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2019-11-23 22:29:00,257 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953924153] [2019-11-23 22:29:00,257 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-23 22:29:00,258 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:29:00,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-23 22:29:00,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-11-23 22:29:00,258 INFO L87 Difference]: Start difference. First operand 242 states and 261 transitions. Second operand 11 states. [2019-11-23 22:29:00,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:29:00,291 INFO L93 Difference]: Finished difference Result 312 states and 337 transitions. [2019-11-23 22:29:00,292 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-23 22:29:00,292 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 241 [2019-11-23 22:29:00,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:29:00,294 INFO L225 Difference]: With dead ends: 312 [2019-11-23 22:29:00,294 INFO L226 Difference]: Without dead ends: 245 [2019-11-23 22:29:00,295 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 231 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-11-23 22:29:00,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2019-11-23 22:29:00,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 244. [2019-11-23 22:29:00,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 244 states. [2019-11-23 22:29:00,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 263 transitions. [2019-11-23 22:29:00,302 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 263 transitions. Word has length 241 [2019-11-23 22:29:00,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:29:00,302 INFO L462 AbstractCegarLoop]: Abstraction has 244 states and 263 transitions. [2019-11-23 22:29:00,302 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-23 22:29:00,302 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 263 transitions. [2019-11-23 22:29:00,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2019-11-23 22:29:00,304 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:29:00,304 INFO L410 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 15, 15, 15, 14, 14, 9, 9, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:29:00,510 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:29:00,510 INFO L410 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:29:00,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:29:00,510 INFO L82 PathProgramCache]: Analyzing trace with hash -1986958145, now seen corresponding path program 31 times [2019-11-23 22:29:00,510 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:29:00,510 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137813331] [2019-11-23 22:29:00,511 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:29:00,524 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:29:00,524 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2005444735] [2019-11-23 22:29:00,524 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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 [2019-11-23 22:29:00,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:29:00,632 INFO L255 TraceCheckSpWp]: Trace formula consists of 524 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-23 22:29:00,634 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:29:00,840 INFO L134 CoverageAnalysis]: Checked inductivity of 2047 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 1851 trivial. 0 not checked. [2019-11-23 22:29:00,840 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137813331] [2019-11-23 22:29:00,840 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:29:00,840 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005444735] [2019-11-23 22:29:00,840 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:29:00,841 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2019-11-23 22:29:00,841 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814689470] [2019-11-23 22:29:00,841 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-11-23 22:29:00,841 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:29:00,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-11-23 22:29:00,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2019-11-23 22:29:00,842 INFO L87 Difference]: Start difference. First operand 244 states and 263 transitions. Second operand 17 states. [2019-11-23 22:29:00,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:29:00,887 INFO L93 Difference]: Finished difference Result 460 states and 498 transitions. [2019-11-23 22:29:00,887 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-23 22:29:00,888 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 243 [2019-11-23 22:29:00,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:29:00,889 INFO L225 Difference]: With dead ends: 460 [2019-11-23 22:29:00,890 INFO L226 Difference]: Without dead ends: 247 [2019-11-23 22:29:00,890 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 227 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2019-11-23 22:29:00,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2019-11-23 22:29:00,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 246. [2019-11-23 22:29:00,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 246 states. [2019-11-23 22:29:00,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 265 transitions. [2019-11-23 22:29:00,897 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 265 transitions. Word has length 243 [2019-11-23 22:29:00,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:29:00,897 INFO L462 AbstractCegarLoop]: Abstraction has 246 states and 265 transitions. [2019-11-23 22:29:00,897 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-11-23 22:29:00,897 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 265 transitions. [2019-11-23 22:29:00,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2019-11-23 22:29:00,898 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:29:00,899 INFO L410 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 15, 15, 15, 15, 15, 9, 9, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:29:01,102 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:29:01,102 INFO L410 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:29:01,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:29:01,103 INFO L82 PathProgramCache]: Analyzing trace with hash -402760579, now seen corresponding path program 32 times [2019-11-23 22:29:01,103 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:29:01,103 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17512598] [2019-11-23 22:29:01,103 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:29:01,115 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:29:01,115 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1096767330] [2019-11-23 22:29:01,115 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:29:01,228 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 22:29:01,228 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:29:01,229 INFO L255 TraceCheckSpWp]: Trace formula consists of 530 conjuncts, 17 conjunts are in the unsatisfiable core [2019-11-23 22:29:01,231 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:29:01,388 INFO L134 CoverageAnalysis]: Checked inductivity of 2076 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 1851 trivial. 0 not checked. [2019-11-23 22:29:01,389 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17512598] [2019-11-23 22:29:01,389 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:29:01,389 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1096767330] [2019-11-23 22:29:01,389 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:29:01,389 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2019-11-23 22:29:01,389 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684511643] [2019-11-23 22:29:01,390 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-11-23 22:29:01,390 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:29:01,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-11-23 22:29:01,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2019-11-23 22:29:01,391 INFO L87 Difference]: Start difference. First operand 246 states and 265 transitions. Second operand 18 states. [2019-11-23 22:29:01,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:29:01,447 INFO L93 Difference]: Finished difference Result 462 states and 500 transitions. [2019-11-23 22:29:01,450 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-11-23 22:29:01,450 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 245 [2019-11-23 22:29:01,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:29:01,451 INFO L225 Difference]: With dead ends: 462 [2019-11-23 22:29:01,451 INFO L226 Difference]: Without dead ends: 249 [2019-11-23 22:29:01,452 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 228 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2019-11-23 22:29:01,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2019-11-23 22:29:01,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 248. [2019-11-23 22:29:01,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 248 states. [2019-11-23 22:29:01,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 267 transitions. [2019-11-23 22:29:01,459 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 267 transitions. Word has length 245 [2019-11-23 22:29:01,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:29:01,459 INFO L462 AbstractCegarLoop]: Abstraction has 248 states and 267 transitions. [2019-11-23 22:29:01,459 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-11-23 22:29:01,459 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 267 transitions. [2019-11-23 22:29:01,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2019-11-23 22:29:01,460 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:29:01,461 INFO L410 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 16, 16, 15, 15, 15, 9, 9, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:29:01,664 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:29:01,665 INFO L410 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:29:01,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:29:01,665 INFO L82 PathProgramCache]: Analyzing trace with hash 1592677563, now seen corresponding path program 33 times [2019-11-23 22:29:01,665 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:29:01,665 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046897509] [2019-11-23 22:29:01,665 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:29:01,676 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:29:01,677 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1147959893] [2019-11-23 22:29:01,677 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2019-11-23 22:29:07,137 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2019-11-23 22:29:07,137 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:29:07,139 INFO L255 TraceCheckSpWp]: Trace formula consists of 362 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-23 22:29:07,142 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:29:07,242 INFO L134 CoverageAnalysis]: Checked inductivity of 2107 backedges. 249 proven. 40 refuted. 0 times theorem prover too weak. 1818 trivial. 0 not checked. [2019-11-23 22:29:07,242 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046897509] [2019-11-23 22:29:07,242 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:29:07,242 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147959893] [2019-11-23 22:29:07,242 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:29:07,243 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2019-11-23 22:29:07,243 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163729172] [2019-11-23 22:29:07,243 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-23 22:29:07,243 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:29:07,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-23 22:29:07,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-11-23 22:29:07,243 INFO L87 Difference]: Start difference. First operand 248 states and 267 transitions. Second operand 9 states. [2019-11-23 22:29:07,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:29:07,382 INFO L93 Difference]: Finished difference Result 414 states and 454 transitions. [2019-11-23 22:29:07,383 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-23 22:29:07,383 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 247 [2019-11-23 22:29:07,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:29:07,385 INFO L225 Difference]: With dead ends: 414 [2019-11-23 22:29:07,385 INFO L226 Difference]: Without dead ends: 263 [2019-11-23 22:29:07,386 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 239 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-11-23 22:29:07,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2019-11-23 22:29:07,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 257. [2019-11-23 22:29:07,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 257 states. [2019-11-23 22:29:07,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 279 transitions. [2019-11-23 22:29:07,392 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 279 transitions. Word has length 247 [2019-11-23 22:29:07,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:29:07,392 INFO L462 AbstractCegarLoop]: Abstraction has 257 states and 279 transitions. [2019-11-23 22:29:07,392 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-23 22:29:07,393 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 279 transitions. [2019-11-23 22:29:07,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2019-11-23 22:29:07,394 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:29:07,394 INFO L410 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 16, 16, 15, 15, 15, 9, 9, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:29:07,597 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:29:07,597 INFO L410 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:29:07,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:29:07,598 INFO L82 PathProgramCache]: Analyzing trace with hash 1317809830, now seen corresponding path program 34 times [2019-11-23 22:29:07,598 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:29:07,598 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882781681] [2019-11-23 22:29:07,599 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:29:07,613 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:29:07,613 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [636427561] [2019-11-23 22:29:07,613 INFO L92 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 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 [2019-11-23 22:29:07,745 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 22:29:07,746 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:29:07,749 INFO L255 TraceCheckSpWp]: Trace formula consists of 560 conjuncts, 18 conjunts are in the unsatisfiable core [2019-11-23 22:29:07,753 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:29:08,034 INFO L134 CoverageAnalysis]: Checked inductivity of 2290 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 2034 trivial. 0 not checked. [2019-11-23 22:29:08,034 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882781681] [2019-11-23 22:29:08,035 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:29:08,035 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [636427561] [2019-11-23 22:29:08,035 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:29:08,035 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2019-11-23 22:29:08,035 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319737153] [2019-11-23 22:29:08,036 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-11-23 22:29:08,036 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:29:08,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-11-23 22:29:08,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2019-11-23 22:29:08,037 INFO L87 Difference]: Start difference. First operand 257 states and 279 transitions. Second operand 19 states. [2019-11-23 22:29:08,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:29:08,089 INFO L93 Difference]: Finished difference Result 482 states and 526 transitions. [2019-11-23 22:29:08,089 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-11-23 22:29:08,090 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 256 [2019-11-23 22:29:08,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:29:08,091 INFO L225 Difference]: With dead ends: 482 [2019-11-23 22:29:08,091 INFO L226 Difference]: Without dead ends: 260 [2019-11-23 22:29:08,092 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 238 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2019-11-23 22:29:08,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2019-11-23 22:29:08,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 259. [2019-11-23 22:29:08,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 259 states. [2019-11-23 22:29:08,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 281 transitions. [2019-11-23 22:29:08,098 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 281 transitions. Word has length 256 [2019-11-23 22:29:08,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:29:08,099 INFO L462 AbstractCegarLoop]: Abstraction has 259 states and 281 transitions. [2019-11-23 22:29:08,099 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-11-23 22:29:08,099 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 281 transitions. [2019-11-23 22:29:08,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2019-11-23 22:29:08,113 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:29:08,113 INFO L410 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 17, 17, 15, 15, 15, 9, 9, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:29:08,317 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:29:08,317 INFO L410 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:29:08,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:29:08,317 INFO L82 PathProgramCache]: Analyzing trace with hash 1903641512, now seen corresponding path program 35 times [2019-11-23 22:29:08,317 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:29:08,318 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340277184] [2019-11-23 22:29:08,318 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:29:08,329 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:29:08,330 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [847027734] [2019-11-23 22:29:08,330 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:29:09,418 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2019-11-23 22:29:09,418 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:29:09,421 INFO L255 TraceCheckSpWp]: Trace formula consists of 566 conjuncts, 17 conjunts are in the unsatisfiable core [2019-11-23 22:29:09,423 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:29:09,609 INFO L134 CoverageAnalysis]: Checked inductivity of 2323 backedges. 266 proven. 345 refuted. 0 times theorem prover too weak. 1712 trivial. 0 not checked. [2019-11-23 22:29:09,610 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340277184] [2019-11-23 22:29:09,610 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:29:09,610 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [847027734] [2019-11-23 22:29:09,610 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:29:09,611 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2019-11-23 22:29:09,611 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519483753] [2019-11-23 22:29:09,611 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-11-23 22:29:09,612 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:29:09,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-11-23 22:29:09,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2019-11-23 22:29:09,612 INFO L87 Difference]: Start difference. First operand 259 states and 281 transitions. Second operand 18 states. [2019-11-23 22:29:09,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:29:09,815 INFO L93 Difference]: Finished difference Result 448 states and 494 transitions. [2019-11-23 22:29:09,816 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-11-23 22:29:09,816 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 258 [2019-11-23 22:29:09,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:29:09,817 INFO L225 Difference]: With dead ends: 448 [2019-11-23 22:29:09,817 INFO L226 Difference]: Without dead ends: 271 [2019-11-23 22:29:09,818 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 241 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2019-11-23 22:29:09,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2019-11-23 22:29:09,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 268. [2019-11-23 22:29:09,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 268 states. [2019-11-23 22:29:09,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 290 transitions. [2019-11-23 22:29:09,825 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 290 transitions. Word has length 258 [2019-11-23 22:29:09,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:29:09,825 INFO L462 AbstractCegarLoop]: Abstraction has 268 states and 290 transitions. [2019-11-23 22:29:09,825 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-11-23 22:29:09,825 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 290 transitions. [2019-11-23 22:29:09,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2019-11-23 22:29:09,826 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:29:09,827 INFO L410 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 17, 17, 16, 16, 16, 9, 9, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:29:10,033 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:29:10,033 INFO L410 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:29:10,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:29:10,034 INFO L82 PathProgramCache]: Analyzing trace with hash 1728607259, now seen corresponding path program 36 times [2019-11-23 22:29:10,034 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:29:10,035 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862325657] [2019-11-23 22:29:10,035 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:29:10,059 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:29:10,059 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1409940100] [2019-11-23 22:29:10,059 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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