java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/nla-digbench/egcd2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 23:17:10,589 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 23:17:10,594 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 23:17:10,613 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 23:17:10,613 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 23:17:10,615 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 23:17:10,618 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 23:17:10,627 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 23:17:10,631 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 23:17:10,633 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 23:17:10,635 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 23:17:10,637 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 23:17:10,638 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 23:17:10,641 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 23:17:10,644 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 23:17:10,645 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 23:17:10,647 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 23:17:10,648 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 23:17:10,650 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 23:17:10,655 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 23:17:10,659 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 23:17:10,662 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 23:17:10,665 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 23:17:10,666 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 23:17:10,668 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 23:17:10,673 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 23:17:10,675 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 23:17:10,676 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 23:17:10,677 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 23:17:10,678 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 23:17:10,678 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 23:17:10,679 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 23:17:10,679 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 23:17:10,680 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 23:17:10,680 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 23:17:10,682 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 23:17:10,683 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 [2019-10-14 23:17:10,711 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 23:17:10,711 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 23:17:10,714 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 23:17:10,714 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 23:17:10,717 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 23:17:10,718 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 23:17:10,718 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 23:17:10,718 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 23:17:10,718 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 23:17:10,718 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 23:17:10,719 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 23:17:10,719 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 23:17:10,719 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 23:17:10,720 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 23:17:10,721 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 23:17:10,721 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 23:17:10,721 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 23:17:10,721 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 23:17:10,722 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 23:17:10,722 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 23:17:10,722 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 23:17:10,722 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 23:17:10,723 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 23:17:10,723 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 23:17:10,723 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 23:17:10,723 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 23:17:10,724 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 23:17:10,724 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 23:17:10,724 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 23:17:11,002 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 23:17:11,014 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 23:17:11,018 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 23:17:11,019 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 23:17:11,020 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 23:17:11,020 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/egcd2.c [2019-10-14 23:17:11,077 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6635fcb71/421863b143b443cba23716e625d30269/FLAGa04c629b8 [2019-10-14 23:17:11,561 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 23:17:11,561 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/egcd2.c [2019-10-14 23:17:11,569 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6635fcb71/421863b143b443cba23716e625d30269/FLAGa04c629b8 [2019-10-14 23:17:11,960 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6635fcb71/421863b143b443cba23716e625d30269 [2019-10-14 23:17:11,970 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 23:17:11,971 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 23:17:11,972 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 23:17:11,972 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 23:17:11,976 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 23:17:11,977 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:17:11" (1/1) ... [2019-10-14 23:17:11,981 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@ae0ff3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:17:11, skipping insertion in model container [2019-10-14 23:17:11,981 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:17:11" (1/1) ... [2019-10-14 23:17:11,989 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 23:17:12,014 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 23:17:12,195 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:17:12,200 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 23:17:12,224 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:17:12,240 INFO L192 MainTranslator]: Completed translation [2019-10-14 23:17:12,240 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:17:12 WrapperNode [2019-10-14 23:17:12,240 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 23:17:12,241 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 23:17:12,241 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 23:17:12,242 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 23:17:12,356 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:17:12" (1/1) ... [2019-10-14 23:17:12,356 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:17:12" (1/1) ... [2019-10-14 23:17:12,363 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:17:12" (1/1) ... [2019-10-14 23:17:12,364 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:17:12" (1/1) ... [2019-10-14 23:17:12,368 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:17:12" (1/1) ... [2019-10-14 23:17:12,374 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:17:12" (1/1) ... [2019-10-14 23:17:12,375 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:17:12" (1/1) ... [2019-10-14 23:17:12,378 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 23:17:12,379 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 23:17:12,379 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 23:17:12,379 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 23:17:12,380 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:17:12" (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 [2019-10-14 23:17:12,434 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 23:17:12,434 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 23:17:12,434 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-14 23:17:12,434 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 23:17:12,435 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 23:17:12,435 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 23:17:12,436 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-10-14 23:17:12,436 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-14 23:17:12,436 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 23:17:12,437 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 23:17:12,437 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 23:17:12,659 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 23:17:12,660 INFO L284 CfgBuilder]: Removed 2 assume(true) statements. [2019-10-14 23:17:12,665 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:17:12 BoogieIcfgContainer [2019-10-14 23:17:12,665 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 23:17:12,668 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 23:17:12,668 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 23:17:12,673 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 23:17:12,673 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 11:17:11" (1/3) ... [2019-10-14 23:17:12,674 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a00a72d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:17:12, skipping insertion in model container [2019-10-14 23:17:12,675 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:17:12" (2/3) ... [2019-10-14 23:17:12,675 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a00a72d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:17:12, skipping insertion in model container [2019-10-14 23:17:12,675 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:17:12" (3/3) ... [2019-10-14 23:17:12,683 INFO L109 eAbstractionObserver]: Analyzing ICFG egcd2.c [2019-10-14 23:17:12,695 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 23:17:12,717 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 23:17:12,744 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 23:17:12,774 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 23:17:12,774 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 23:17:12,776 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 23:17:12,776 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 23:17:12,776 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 23:17:12,776 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 23:17:12,777 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 23:17:12,777 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 23:17:12,805 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2019-10-14 23:17:12,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-10-14 23:17:12,812 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:17:12,812 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:17:12,814 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:17:12,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:17:12,819 INFO L82 PathProgramCache]: Analyzing trace with hash -558324168, now seen corresponding path program 1 times [2019-10-14 23:17:12,826 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:17:12,826 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454941292] [2019-10-14 23:17:12,827 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:12,827 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:12,827 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:17:12,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:17:12,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:17:12,935 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:17:12,935 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454941292] [2019-10-14 23:17:12,936 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:17:12,937 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-10-14 23:17:12,937 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654714548] [2019-10-14 23:17:12,940 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-14 23:17:12,941 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:17:12,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-14 23:17:12,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-14 23:17:12,955 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 2 states. [2019-10-14 23:17:12,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:17:12,984 INFO L93 Difference]: Finished difference Result 49 states and 77 transitions. [2019-10-14 23:17:12,984 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-14 23:17:12,985 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2019-10-14 23:17:12,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:17:12,995 INFO L225 Difference]: With dead ends: 49 [2019-10-14 23:17:12,995 INFO L226 Difference]: Without dead ends: 22 [2019-10-14 23:17:12,999 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-14 23:17:13,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-10-14 23:17:13,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2019-10-14 23:17:13,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-10-14 23:17:13,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 28 transitions. [2019-10-14 23:17:13,039 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 28 transitions. Word has length 10 [2019-10-14 23:17:13,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:17:13,039 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 28 transitions. [2019-10-14 23:17:13,039 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-14 23:17:13,039 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 28 transitions. [2019-10-14 23:17:13,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-10-14 23:17:13,041 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:17:13,041 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:17:13,041 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:17:13,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:17:13,042 INFO L82 PathProgramCache]: Analyzing trace with hash -1008536757, now seen corresponding path program 1 times [2019-10-14 23:17:13,042 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:17:13,043 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041334674] [2019-10-14 23:17:13,043 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:13,043 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:13,043 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:17:13,054 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:17:13,055 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1089956743] [2019-10-14 23:17:13,055 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 [2019-10-14 23:17:13,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:17:13,114 INFO L256 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-14 23:17:13,118 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:17:13,150 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:17:13,150 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041334674] [2019-10-14 23:17:13,151 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:17:13,151 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1089956743] [2019-10-14 23:17:13,151 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:17:13,151 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-14 23:17:13,152 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218244485] [2019-10-14 23:17:13,153 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 23:17:13,154 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:17:13,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 23:17:13,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 23:17:13,154 INFO L87 Difference]: Start difference. First operand 22 states and 28 transitions. Second operand 3 states. [2019-10-14 23:17:13,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:17:13,191 INFO L93 Difference]: Finished difference Result 39 states and 51 transitions. [2019-10-14 23:17:13,192 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 23:17:13,192 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2019-10-14 23:17:13,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:17:13,194 INFO L225 Difference]: With dead ends: 39 [2019-10-14 23:17:13,194 INFO L226 Difference]: Without dead ends: 31 [2019-10-14 23:17:13,195 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 23:17:13,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-10-14 23:17:13,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 24. [2019-10-14 23:17:13,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-10-14 23:17:13,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 30 transitions. [2019-10-14 23:17:13,207 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 30 transitions. Word has length 11 [2019-10-14 23:17:13,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:17:13,207 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 30 transitions. [2019-10-14 23:17:13,207 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 23:17:13,208 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 30 transitions. [2019-10-14 23:17:13,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-10-14 23:17:13,208 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:17:13,209 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:17:13,414 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:17:13,414 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:17:13,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:17:13,415 INFO L82 PathProgramCache]: Analyzing trace with hash -1182801044, now seen corresponding path program 1 times [2019-10-14 23:17:13,415 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:17:13,416 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040315660] [2019-10-14 23:17:13,416 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:13,417 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:13,417 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:17:13,448 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:17:13,448 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1650256070] [2019-10-14 23:17:13,449 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 [2019-10-14 23:17:13,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:17:13,482 INFO L256 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-14 23:17:13,484 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:17:13,515 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:17:13,516 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040315660] [2019-10-14 23:17:13,516 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:17:13,518 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1650256070] [2019-10-14 23:17:13,518 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:17:13,519 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-14 23:17:13,519 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991099173] [2019-10-14 23:17:13,520 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 23:17:13,520 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:17:13,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 23:17:13,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-14 23:17:13,521 INFO L87 Difference]: Start difference. First operand 24 states and 30 transitions. Second operand 5 states. [2019-10-14 23:17:13,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:17:13,626 INFO L93 Difference]: Finished difference Result 37 states and 47 transitions. [2019-10-14 23:17:13,626 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-14 23:17:13,627 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2019-10-14 23:17:13,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:17:13,628 INFO L225 Difference]: With dead ends: 37 [2019-10-14 23:17:13,628 INFO L226 Difference]: Without dead ends: 35 [2019-10-14 23:17:13,629 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-14 23:17:13,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-10-14 23:17:13,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 30. [2019-10-14 23:17:13,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-10-14 23:17:13,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 36 transitions. [2019-10-14 23:17:13,638 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 36 transitions. Word has length 12 [2019-10-14 23:17:13,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:17:13,639 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 36 transitions. [2019-10-14 23:17:13,639 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 23:17:13,639 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 36 transitions. [2019-10-14 23:17:13,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-10-14 23:17:13,640 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:17:13,640 INFO L380 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:17:13,846 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:17:13,847 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:17:13,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:17:13,848 INFO L82 PathProgramCache]: Analyzing trace with hash -2031293851, now seen corresponding path program 1 times [2019-10-14 23:17:13,848 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:17:13,849 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461525825] [2019-10-14 23:17:13,849 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:13,850 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:13,850 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:17:13,859 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:17:13,861 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [416402924] [2019-10-14 23:17:13,861 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 [2019-10-14 23:17:13,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:17:13,897 INFO L256 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 13 conjunts are in the unsatisfiable core [2019-10-14 23:17:13,900 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:17:13,964 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:17:13,964 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461525825] [2019-10-14 23:17:13,965 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:17:13,965 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [416402924] [2019-10-14 23:17:13,965 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:17:13,965 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-14 23:17:13,965 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219490437] [2019-10-14 23:17:13,966 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 23:17:13,968 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:17:13,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 23:17:13,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-14 23:17:13,969 INFO L87 Difference]: Start difference. First operand 30 states and 36 transitions. Second operand 5 states. [2019-10-14 23:17:14,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:17:14,063 INFO L93 Difference]: Finished difference Result 45 states and 56 transitions. [2019-10-14 23:17:14,064 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-14 23:17:14,064 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2019-10-14 23:17:14,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:17:14,068 INFO L225 Difference]: With dead ends: 45 [2019-10-14 23:17:14,068 INFO L226 Difference]: Without dead ends: 43 [2019-10-14 23:17:14,069 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-14 23:17:14,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-10-14 23:17:14,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2019-10-14 23:17:14,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-10-14 23:17:14,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 53 transitions. [2019-10-14 23:17:14,081 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 53 transitions. Word has length 17 [2019-10-14 23:17:14,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:17:14,081 INFO L462 AbstractCegarLoop]: Abstraction has 42 states and 53 transitions. [2019-10-14 23:17:14,081 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 23:17:14,081 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 53 transitions. [2019-10-14 23:17:14,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-10-14 23:17:14,082 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:17:14,083 INFO L380 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:17:14,293 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:17:14,294 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:17:14,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:17:14,295 INFO L82 PathProgramCache]: Analyzing trace with hash -71864628, now seen corresponding path program 1 times [2019-10-14 23:17:14,295 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:17:14,296 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558234511] [2019-10-14 23:17:14,296 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:14,297 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:14,297 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:17:14,303 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:17:14,304 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [527392092] [2019-10-14 23:17:14,304 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 [2019-10-14 23:17:14,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:17:14,343 INFO L256 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 13 conjunts are in the unsatisfiable core [2019-10-14 23:17:14,348 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:17:14,417 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-14 23:17:14,419 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558234511] [2019-10-14 23:17:14,419 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:17:14,419 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [527392092] [2019-10-14 23:17:14,419 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:17:14,420 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-14 23:17:14,420 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950343085] [2019-10-14 23:17:14,420 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 23:17:14,421 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:17:14,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 23:17:14,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-14 23:17:14,421 INFO L87 Difference]: Start difference. First operand 42 states and 53 transitions. Second operand 5 states. [2019-10-14 23:17:14,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:17:14,492 INFO L93 Difference]: Finished difference Result 49 states and 59 transitions. [2019-10-14 23:17:14,493 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-14 23:17:14,493 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2019-10-14 23:17:14,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:17:14,495 INFO L225 Difference]: With dead ends: 49 [2019-10-14 23:17:14,495 INFO L226 Difference]: Without dead ends: 47 [2019-10-14 23:17:14,495 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-14 23:17:14,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2019-10-14 23:17:14,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2019-10-14 23:17:14,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2019-10-14 23:17:14,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 56 transitions. [2019-10-14 23:17:14,512 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 56 transitions. Word has length 22 [2019-10-14 23:17:14,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:17:14,513 INFO L462 AbstractCegarLoop]: Abstraction has 46 states and 56 transitions. [2019-10-14 23:17:14,513 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 23:17:14,513 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 56 transitions. [2019-10-14 23:17:14,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-10-14 23:17:14,514 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:17:14,515 INFO L380 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:17:14,716 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:17:14,717 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:17:14,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:17:14,718 INFO L82 PathProgramCache]: Analyzing trace with hash 954332139, now seen corresponding path program 1 times [2019-10-14 23:17:14,718 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:17:14,719 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930923551] [2019-10-14 23:17:14,722 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:14,722 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:14,723 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:17:14,730 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:17:14,730 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1954660987] [2019-10-14 23:17:14,730 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 [2019-10-14 23:17:14,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:17:14,773 INFO L256 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 15 conjunts are in the unsatisfiable core [2019-10-14 23:17:14,775 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:17:14,823 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-10-14 23:17:14,823 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930923551] [2019-10-14 23:17:14,823 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:17:14,824 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1954660987] [2019-10-14 23:17:14,824 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:17:14,824 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2019-10-14 23:17:14,824 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165971749] [2019-10-14 23:17:14,825 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-14 23:17:14,825 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:17:14,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-14 23:17:14,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-10-14 23:17:14,826 INFO L87 Difference]: Start difference. First operand 46 states and 56 transitions. Second operand 6 states. [2019-10-14 23:17:14,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:17:14,962 INFO L93 Difference]: Finished difference Result 74 states and 101 transitions. [2019-10-14 23:17:14,962 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-14 23:17:14,962 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 34 [2019-10-14 23:17:14,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:17:14,967 INFO L225 Difference]: With dead ends: 74 [2019-10-14 23:17:14,967 INFO L226 Difference]: Without dead ends: 72 [2019-10-14 23:17:14,968 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-14 23:17:14,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2019-10-14 23:17:14,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 62. [2019-10-14 23:17:14,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2019-10-14 23:17:15,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 81 transitions. [2019-10-14 23:17:15,006 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 81 transitions. Word has length 34 [2019-10-14 23:17:15,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:17:15,006 INFO L462 AbstractCegarLoop]: Abstraction has 62 states and 81 transitions. [2019-10-14 23:17:15,006 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-14 23:17:15,007 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 81 transitions. [2019-10-14 23:17:15,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-10-14 23:17:15,011 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:17:15,011 INFO L380 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:17:15,215 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:17:15,216 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:17:15,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:17:15,216 INFO L82 PathProgramCache]: Analyzing trace with hash 286726549, now seen corresponding path program 1 times [2019-10-14 23:17:15,216 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:17:15,216 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975583152] [2019-10-14 23:17:15,216 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:15,217 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:15,217 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:17:15,225 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:17:15,225 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1645620863] [2019-10-14 23:17:15,225 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2019-10-14 23:17:15,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:17:15,288 INFO L256 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-14 23:17:15,291 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:17:15,311 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-10-14 23:17:15,312 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975583152] [2019-10-14 23:17:15,312 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:17:15,312 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1645620863] [2019-10-14 23:17:15,312 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:17:15,313 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2019-10-14 23:17:15,313 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735267976] [2019-10-14 23:17:15,313 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 23:17:15,314 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:17:15,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 23:17:15,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-14 23:17:15,314 INFO L87 Difference]: Start difference. First operand 62 states and 81 transitions. Second operand 5 states. [2019-10-14 23:17:15,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:17:15,423 INFO L93 Difference]: Finished difference Result 107 states and 151 transitions. [2019-10-14 23:17:15,423 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-14 23:17:15,423 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 36 [2019-10-14 23:17:15,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:17:15,425 INFO L225 Difference]: With dead ends: 107 [2019-10-14 23:17:15,426 INFO L226 Difference]: Without dead ends: 99 [2019-10-14 23:17:15,426 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-14 23:17:15,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2019-10-14 23:17:15,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 88. [2019-10-14 23:17:15,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2019-10-14 23:17:15,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 124 transitions. [2019-10-14 23:17:15,446 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 124 transitions. Word has length 36 [2019-10-14 23:17:15,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:17:15,446 INFO L462 AbstractCegarLoop]: Abstraction has 88 states and 124 transitions. [2019-10-14 23:17:15,446 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 23:17:15,446 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 124 transitions. [2019-10-14 23:17:15,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-10-14 23:17:15,448 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:17:15,448 INFO L380 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:17:15,652 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:17:15,652 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:17:15,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:17:15,652 INFO L82 PathProgramCache]: Analyzing trace with hash -1803964113, now seen corresponding path program 1 times [2019-10-14 23:17:15,653 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:17:15,653 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218543357] [2019-10-14 23:17:15,653 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:15,653 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:15,653 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:17:15,664 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:17:15,665 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [458154732] [2019-10-14 23:17:15,665 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:17:15,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:17:15,700 INFO L256 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 19 conjunts are in the unsatisfiable core [2019-10-14 23:17:15,702 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:17:15,773 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2019-10-14 23:17:15,774 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218543357] [2019-10-14 23:17:15,774 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:17:15,774 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [458154732] [2019-10-14 23:17:15,774 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:17:15,774 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2019-10-14 23:17:15,775 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589699256] [2019-10-14 23:17:15,775 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-14 23:17:15,775 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:17:15,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-14 23:17:15,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-10-14 23:17:15,776 INFO L87 Difference]: Start difference. First operand 88 states and 124 transitions. Second operand 6 states. [2019-10-14 23:17:15,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:17:15,904 INFO L93 Difference]: Finished difference Result 133 states and 192 transitions. [2019-10-14 23:17:15,907 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-14 23:17:15,907 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 42 [2019-10-14 23:17:15,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:17:15,910 INFO L225 Difference]: With dead ends: 133 [2019-10-14 23:17:15,910 INFO L226 Difference]: Without dead ends: 130 [2019-10-14 23:17:15,911 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-14 23:17:15,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2019-10-14 23:17:15,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 127. [2019-10-14 23:17:15,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2019-10-14 23:17:15,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 185 transitions. [2019-10-14 23:17:15,942 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 185 transitions. Word has length 42 [2019-10-14 23:17:15,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:17:15,943 INFO L462 AbstractCegarLoop]: Abstraction has 127 states and 185 transitions. [2019-10-14 23:17:15,943 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-14 23:17:15,943 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 185 transitions. [2019-10-14 23:17:15,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2019-10-14 23:17:15,945 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:17:15,945 INFO L380 BasicCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:17:16,148 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:17:16,149 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:17:16,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:17:16,150 INFO L82 PathProgramCache]: Analyzing trace with hash -1108781502, now seen corresponding path program 2 times [2019-10-14 23:17:16,151 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:17:16,151 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307339812] [2019-10-14 23:17:16,151 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:16,152 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:16,152 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:17:16,159 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:17:16,160 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [393478514] [2019-10-14 23:17:16,160 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 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 [2019-10-14 23:17:16,208 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 23:17:16,209 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:17:16,210 INFO L256 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 27 conjunts are in the unsatisfiable core [2019-10-14 23:17:16,213 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:17:16,311 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2019-10-14 23:17:16,312 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307339812] [2019-10-14 23:17:16,312 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:17:16,312 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [393478514] [2019-10-14 23:17:16,312 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:17:16,312 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2019-10-14 23:17:16,313 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77897828] [2019-10-14 23:17:16,313 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-14 23:17:16,314 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:17:16,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-14 23:17:16,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-10-14 23:17:16,314 INFO L87 Difference]: Start difference. First operand 127 states and 185 transitions. Second operand 7 states. [2019-10-14 23:17:16,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:17:16,484 INFO L93 Difference]: Finished difference Result 139 states and 195 transitions. [2019-10-14 23:17:16,485 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 23:17:16,486 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 47 [2019-10-14 23:17:16,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:17:16,488 INFO L225 Difference]: With dead ends: 139 [2019-10-14 23:17:16,488 INFO L226 Difference]: Without dead ends: 137 [2019-10-14 23:17:16,489 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2019-10-14 23:17:16,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2019-10-14 23:17:16,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 135. [2019-10-14 23:17:16,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2019-10-14 23:17:16,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 191 transitions. [2019-10-14 23:17:16,512 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 191 transitions. Word has length 47 [2019-10-14 23:17:16,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:17:16,513 INFO L462 AbstractCegarLoop]: Abstraction has 135 states and 191 transitions. [2019-10-14 23:17:16,513 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-14 23:17:16,513 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 191 transitions. [2019-10-14 23:17:16,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2019-10-14 23:17:16,515 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:17:16,515 INFO L380 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:17:16,720 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:17:16,720 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:17:16,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:17:16,721 INFO L82 PathProgramCache]: Analyzing trace with hash 183700266, now seen corresponding path program 2 times [2019-10-14 23:17:16,721 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:17:16,721 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079832580] [2019-10-14 23:17:16,721 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:16,721 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:16,722 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:17:16,728 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:17:16,728 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2054222274] [2019-10-14 23:17:16,729 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 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 [2019-10-14 23:17:16,768 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 23:17:16,769 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:17:16,770 INFO L256 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 19 conjunts are in the unsatisfiable core [2019-10-14 23:17:16,773 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:17:16,831 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 16 proven. 10 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2019-10-14 23:17:16,832 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079832580] [2019-10-14 23:17:16,832 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:17:16,832 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2054222274] [2019-10-14 23:17:16,832 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:17:16,832 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2019-10-14 23:17:16,833 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219481945] [2019-10-14 23:17:16,833 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-14 23:17:16,833 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:17:16,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-14 23:17:16,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-10-14 23:17:16,834 INFO L87 Difference]: Start difference. First operand 135 states and 191 transitions. Second operand 7 states. [2019-10-14 23:17:17,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:17:17,067 INFO L93 Difference]: Finished difference Result 198 states and 298 transitions. [2019-10-14 23:17:17,068 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 23:17:17,068 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 56 [2019-10-14 23:17:17,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:17:17,071 INFO L225 Difference]: With dead ends: 198 [2019-10-14 23:17:17,071 INFO L226 Difference]: Without dead ends: 196 [2019-10-14 23:17:17,072 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-10-14 23:17:17,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2019-10-14 23:17:17,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 169. [2019-10-14 23:17:17,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2019-10-14 23:17:17,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 249 transitions. [2019-10-14 23:17:17,100 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 249 transitions. Word has length 56 [2019-10-14 23:17:17,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:17:17,101 INFO L462 AbstractCegarLoop]: Abstraction has 169 states and 249 transitions. [2019-10-14 23:17:17,101 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-14 23:17:17,101 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 249 transitions. [2019-10-14 23:17:17,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2019-10-14 23:17:17,103 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:17:17,103 INFO L380 BasicCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:17:17,309 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:17:17,310 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:17:17,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:17:17,310 INFO L82 PathProgramCache]: Analyzing trace with hash -1556128492, now seen corresponding path program 1 times [2019-10-14 23:17:17,311 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:17:17,311 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146125962] [2019-10-14 23:17:17,311 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:17,311 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:17,311 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:17:17,317 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:17:17,318 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [270410902] [2019-10-14 23:17:17,318 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2019-10-14 23:17:17,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:17:17,365 INFO L256 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 37 conjunts are in the unsatisfiable core [2019-10-14 23:17:17,368 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:17:17,533 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2019-10-14 23:17:17,534 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146125962] [2019-10-14 23:17:17,534 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:17:17,539 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [270410902] [2019-10-14 23:17:17,540 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:17:17,540 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2019-10-14 23:17:17,540 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739002392] [2019-10-14 23:17:17,541 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-14 23:17:17,541 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:17:17,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-14 23:17:17,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2019-10-14 23:17:17,544 INFO L87 Difference]: Start difference. First operand 169 states and 249 transitions. Second operand 9 states. [2019-10-14 23:17:17,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:17:17,854 INFO L93 Difference]: Finished difference Result 205 states and 300 transitions. [2019-10-14 23:17:17,855 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-14 23:17:17,855 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 58 [2019-10-14 23:17:17,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:17:17,857 INFO L225 Difference]: With dead ends: 205 [2019-10-14 23:17:17,857 INFO L226 Difference]: Without dead ends: 202 [2019-10-14 23:17:17,858 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2019-10-14 23:17:17,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2019-10-14 23:17:17,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 200. [2019-10-14 23:17:17,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2019-10-14 23:17:17,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 294 transitions. [2019-10-14 23:17:17,885 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 294 transitions. Word has length 58 [2019-10-14 23:17:17,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:17:17,886 INFO L462 AbstractCegarLoop]: Abstraction has 200 states and 294 transitions. [2019-10-14 23:17:17,886 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-14 23:17:17,886 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 294 transitions. [2019-10-14 23:17:17,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2019-10-14 23:17:17,888 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:17:17,888 INFO L380 BasicCegarLoop]: trace histogram [10, 9, 9, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:17:18,093 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:17:18,093 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:17:18,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:17:18,094 INFO L82 PathProgramCache]: Analyzing trace with hash 674447781, now seen corresponding path program 3 times [2019-10-14 23:17:18,094 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:17:18,094 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169712146] [2019-10-14 23:17:18,094 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:18,094 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:18,094 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:17:18,100 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:17:18,101 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [983839040] [2019-10-14 23:17:18,101 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 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 [2019-10-14 23:17:18,145 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-14 23:17:18,145 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:17:18,146 INFO L256 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-14 23:17:18,149 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:17:18,193 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 67 proven. 0 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2019-10-14 23:17:18,197 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169712146] [2019-10-14 23:17:18,198 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:17:18,198 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983839040] [2019-10-14 23:17:18,198 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:17:18,198 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-14 23:17:18,199 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536479291] [2019-10-14 23:17:18,201 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 23:17:18,202 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:17:18,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 23:17:18,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-14 23:17:18,203 INFO L87 Difference]: Start difference. First operand 200 states and 294 transitions. Second operand 5 states. [2019-10-14 23:17:18,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:17:18,316 INFO L93 Difference]: Finished difference Result 252 states and 366 transitions. [2019-10-14 23:17:18,316 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-14 23:17:18,316 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 67 [2019-10-14 23:17:18,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:17:18,324 INFO L225 Difference]: With dead ends: 252 [2019-10-14 23:17:18,324 INFO L226 Difference]: Without dead ends: 177 [2019-10-14 23:17:18,330 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-14 23:17:18,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2019-10-14 23:17:18,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 141. [2019-10-14 23:17:18,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2019-10-14 23:17:18,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 195 transitions. [2019-10-14 23:17:18,359 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 195 transitions. Word has length 67 [2019-10-14 23:17:18,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:17:18,359 INFO L462 AbstractCegarLoop]: Abstraction has 141 states and 195 transitions. [2019-10-14 23:17:18,359 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 23:17:18,359 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 195 transitions. [2019-10-14 23:17:18,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2019-10-14 23:17:18,362 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:17:18,362 INFO L380 BasicCegarLoop]: trace histogram [13, 12, 12, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:17:18,575 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:17:18,576 INFO L410 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:17:18,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:17:18,576 INFO L82 PathProgramCache]: Analyzing trace with hash 1094555945, now seen corresponding path program 3 times [2019-10-14 23:17:18,577 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:17:18,577 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637599165] [2019-10-14 23:17:18,577 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:18,577 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:18,578 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:17:18,584 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:17:18,585 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [640740352] [2019-10-14 23:17:18,585 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 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 [2019-10-14 23:17:18,644 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-10-14 23:17:18,644 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:17:18,645 INFO L256 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 28 conjunts are in the unsatisfiable core [2019-10-14 23:17:18,648 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:17:18,743 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 61 proven. 10 refuted. 0 times theorem prover too weak. 241 trivial. 0 not checked. [2019-10-14 23:17:18,743 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637599165] [2019-10-14 23:17:18,743 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:17:18,744 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [640740352] [2019-10-14 23:17:18,744 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:17:18,744 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2019-10-14 23:17:18,744 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770381074] [2019-10-14 23:17:18,746 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-14 23:17:18,747 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:17:18,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-14 23:17:18,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-10-14 23:17:18,748 INFO L87 Difference]: Start difference. First operand 141 states and 195 transitions. Second operand 8 states. [2019-10-14 23:17:18,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:17:18,911 INFO L93 Difference]: Finished difference Result 151 states and 203 transitions. [2019-10-14 23:17:18,911 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-14 23:17:18,911 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 78 [2019-10-14 23:17:18,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:17:18,914 INFO L225 Difference]: With dead ends: 151 [2019-10-14 23:17:18,914 INFO L226 Difference]: Without dead ends: 149 [2019-10-14 23:17:18,915 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2019-10-14 23:17:18,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2019-10-14 23:17:18,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 143. [2019-10-14 23:17:18,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2019-10-14 23:17:18,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 195 transitions. [2019-10-14 23:17:18,937 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 195 transitions. Word has length 78 [2019-10-14 23:17:18,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:17:18,939 INFO L462 AbstractCegarLoop]: Abstraction has 143 states and 195 transitions. [2019-10-14 23:17:18,939 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-14 23:17:18,939 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 195 transitions. [2019-10-14 23:17:18,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2019-10-14 23:17:18,942 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:17:18,942 INFO L380 BasicCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:17:19,147 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:17:19,147 INFO L410 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:17:19,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:17:19,148 INFO L82 PathProgramCache]: Analyzing trace with hash 1897817939, now seen corresponding path program 2 times [2019-10-14 23:17:19,148 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:17:19,148 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445214613] [2019-10-14 23:17:19,148 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:19,148 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:19,148 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:17:19,163 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:17:19,164 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1852697012] [2019-10-14 23:17:19,164 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 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 [2019-10-14 23:17:19,206 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 23:17:19,207 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:17:19,208 INFO L256 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 43 conjunts are in the unsatisfiable core [2019-10-14 23:17:19,211 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:17:19,417 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 24 proven. 20 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2019-10-14 23:17:19,417 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445214613] [2019-10-14 23:17:19,417 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:17:19,418 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852697012] [2019-10-14 23:17:19,418 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:17:19,418 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2019-10-14 23:17:19,418 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723044050] [2019-10-14 23:17:19,418 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-14 23:17:19,419 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:17:19,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-14 23:17:19,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2019-10-14 23:17:19,419 INFO L87 Difference]: Start difference. First operand 143 states and 195 transitions. Second operand 10 states. [2019-10-14 23:17:19,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:17:19,841 INFO L93 Difference]: Finished difference Result 185 states and 256 transitions. [2019-10-14 23:17:19,842 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-14 23:17:19,842 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 80 [2019-10-14 23:17:19,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:17:19,844 INFO L225 Difference]: With dead ends: 185 [2019-10-14 23:17:19,844 INFO L226 Difference]: Without dead ends: 182 [2019-10-14 23:17:19,845 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2019-10-14 23:17:19,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2019-10-14 23:17:19,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 153. [2019-10-14 23:17:19,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2019-10-14 23:17:19,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 209 transitions. [2019-10-14 23:17:19,861 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 209 transitions. Word has length 80 [2019-10-14 23:17:19,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:17:19,862 INFO L462 AbstractCegarLoop]: Abstraction has 153 states and 209 transitions. [2019-10-14 23:17:19,862 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-14 23:17:19,862 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 209 transitions. [2019-10-14 23:17:19,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2019-10-14 23:17:19,863 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:17:19,863 INFO L380 BasicCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:17:20,068 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:17:20,068 INFO L410 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:17:20,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:17:20,069 INFO L82 PathProgramCache]: Analyzing trace with hash 1613054346, now seen corresponding path program 3 times [2019-10-14 23:17:20,069 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:17:20,069 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122211380] [2019-10-14 23:17:20,069 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:20,069 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:20,069 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:17:20,075 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:17:20,075 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [194170904] [2019-10-14 23:17:20,076 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 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 [2019-10-14 23:17:20,119 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-14 23:17:20,119 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:17:20,120 INFO L256 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-14 23:17:20,123 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:17:20,173 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 40 proven. 9 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2019-10-14 23:17:20,174 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122211380] [2019-10-14 23:17:20,174 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:17:20,174 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194170904] [2019-10-14 23:17:20,174 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:17:20,174 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2019-10-14 23:17:20,175 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805632387] [2019-10-14 23:17:20,175 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-14 23:17:20,175 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:17:20,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-14 23:17:20,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-10-14 23:17:20,176 INFO L87 Difference]: Start difference. First operand 153 states and 209 transitions. Second operand 7 states. [2019-10-14 23:17:20,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:17:20,409 INFO L93 Difference]: Finished difference Result 185 states and 257 transitions. [2019-10-14 23:17:20,410 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-14 23:17:20,410 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 83 [2019-10-14 23:17:20,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:17:20,412 INFO L225 Difference]: With dead ends: 185 [2019-10-14 23:17:20,412 INFO L226 Difference]: Without dead ends: 177 [2019-10-14 23:17:20,413 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2019-10-14 23:17:20,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2019-10-14 23:17:20,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 156. [2019-10-14 23:17:20,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2019-10-14 23:17:20,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 212 transitions. [2019-10-14 23:17:20,430 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 212 transitions. Word has length 83 [2019-10-14 23:17:20,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:17:20,430 INFO L462 AbstractCegarLoop]: Abstraction has 156 states and 212 transitions. [2019-10-14 23:17:20,430 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-14 23:17:20,431 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 212 transitions. [2019-10-14 23:17:20,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2019-10-14 23:17:20,432 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:17:20,432 INFO L380 BasicCegarLoop]: trace histogram [14, 13, 13, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:17:20,638 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:17:20,638 INFO L410 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:17:20,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:17:20,639 INFO L82 PathProgramCache]: Analyzing trace with hash -1805300380, now seen corresponding path program 1 times [2019-10-14 23:17:20,639 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:17:20,640 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466968157] [2019-10-14 23:17:20,640 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:20,640 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:20,640 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:17:20,657 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:17:20,657 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1808699854] [2019-10-14 23:17:20,657 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:17:20,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:17:20,715 INFO L256 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 33 conjunts are in the unsatisfiable core [2019-10-14 23:17:20,717 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:17:20,826 INFO L134 CoverageAnalysis]: Checked inductivity of 372 backedges. 26 proven. 28 refuted. 0 times theorem prover too weak. 318 trivial. 0 not checked. [2019-10-14 23:17:20,826 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466968157] [2019-10-14 23:17:20,826 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:17:20,826 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1808699854] [2019-10-14 23:17:20,827 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:17:20,827 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2019-10-14 23:17:20,827 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203508874] [2019-10-14 23:17:20,827 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-14 23:17:20,828 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:17:20,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-14 23:17:20,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2019-10-14 23:17:20,828 INFO L87 Difference]: Start difference. First operand 156 states and 212 transitions. Second operand 8 states. [2019-10-14 23:17:21,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:17:21,043 INFO L93 Difference]: Finished difference Result 219 states and 305 transitions. [2019-10-14 23:17:21,043 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-14 23:17:21,043 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 89 [2019-10-14 23:17:21,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:17:21,045 INFO L225 Difference]: With dead ends: 219 [2019-10-14 23:17:21,046 INFO L226 Difference]: Without dead ends: 216 [2019-10-14 23:17:21,046 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2019-10-14 23:17:21,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2019-10-14 23:17:21,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 213. [2019-10-14 23:17:21,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 213 states. [2019-10-14 23:17:21,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 298 transitions. [2019-10-14 23:17:21,068 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 298 transitions. Word has length 89 [2019-10-14 23:17:21,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:17:21,069 INFO L462 AbstractCegarLoop]: Abstraction has 213 states and 298 transitions. [2019-10-14 23:17:21,069 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-14 23:17:21,069 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 298 transitions. [2019-10-14 23:17:21,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2019-10-14 23:17:21,070 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:17:21,071 INFO L380 BasicCegarLoop]: trace histogram [15, 14, 14, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:17:21,273 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:17:21,274 INFO L410 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:17:21,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:17:21,274 INFO L82 PathProgramCache]: Analyzing trace with hash -2024795347, now seen corresponding path program 2 times [2019-10-14 23:17:21,275 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:17:21,275 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396642699] [2019-10-14 23:17:21,275 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:21,275 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:21,275 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:17:21,289 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:17:21,290 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [507064557] [2019-10-14 23:17:21,290 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 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 [2019-10-14 23:17:21,347 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 23:17:21,347 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:17:21,349 INFO L256 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 53 conjunts are in the unsatisfiable core [2019-10-14 23:17:21,351 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:17:21,510 INFO L134 CoverageAnalysis]: Checked inductivity of 429 backedges. 28 proven. 37 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2019-10-14 23:17:21,510 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396642699] [2019-10-14 23:17:21,510 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:17:21,510 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [507064557] [2019-10-14 23:17:21,511 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:17:21,511 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2019-10-14 23:17:21,511 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798712406] [2019-10-14 23:17:21,511 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-14 23:17:21,512 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:17:21,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-14 23:17:21,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2019-10-14 23:17:21,512 INFO L87 Difference]: Start difference. First operand 213 states and 298 transitions. Second operand 10 states. [2019-10-14 23:17:22,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:17:22,067 INFO L93 Difference]: Finished difference Result 253 states and 349 transitions. [2019-10-14 23:17:22,067 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-14 23:17:22,068 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 94 [2019-10-14 23:17:22,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:17:22,070 INFO L225 Difference]: With dead ends: 253 [2019-10-14 23:17:22,070 INFO L226 Difference]: Without dead ends: 251 [2019-10-14 23:17:22,071 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2019-10-14 23:17:22,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2019-10-14 23:17:22,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 195. [2019-10-14 23:17:22,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2019-10-14 23:17:22,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 262 transitions. [2019-10-14 23:17:22,097 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 262 transitions. Word has length 94 [2019-10-14 23:17:22,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:17:22,098 INFO L462 AbstractCegarLoop]: Abstraction has 195 states and 262 transitions. [2019-10-14 23:17:22,098 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-14 23:17:22,098 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 262 transitions. [2019-10-14 23:17:22,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2019-10-14 23:17:22,112 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:17:22,113 INFO L380 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:17:22,316 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:17:22,317 INFO L410 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:17:22,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:17:22,317 INFO L82 PathProgramCache]: Analyzing trace with hash 804169810, now seen corresponding path program 4 times [2019-10-14 23:17:22,318 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:17:22,318 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476527705] [2019-10-14 23:17:22,319 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:22,319 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:22,319 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:17:22,325 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:17:22,326 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [755287802] [2019-10-14 23:17:22,326 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 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 [2019-10-14 23:17:22,377 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 23:17:22,377 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:17:22,378 INFO L256 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 51 conjunts are in the unsatisfiable core [2019-10-14 23:17:22,380 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:17:22,544 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:17:22,607 INFO L134 CoverageAnalysis]: Checked inductivity of 550 backedges. 31 proven. 156 refuted. 0 times theorem prover too weak. 363 trivial. 0 not checked. [2019-10-14 23:17:22,608 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476527705] [2019-10-14 23:17:22,608 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:17:22,608 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755287802] [2019-10-14 23:17:22,608 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:17:22,608 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2019-10-14 23:17:22,608 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261701422] [2019-10-14 23:17:22,609 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-10-14 23:17:22,609 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:17:22,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-10-14 23:17:22,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2019-10-14 23:17:22,610 INFO L87 Difference]: Start difference. First operand 195 states and 262 transitions. Second operand 14 states. [2019-10-14 23:17:23,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:17:23,233 INFO L93 Difference]: Finished difference Result 267 states and 383 transitions. [2019-10-14 23:17:23,233 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-10-14 23:17:23,233 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 102 [2019-10-14 23:17:23,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:17:23,236 INFO L225 Difference]: With dead ends: 267 [2019-10-14 23:17:23,236 INFO L226 Difference]: Without dead ends: 264 [2019-10-14 23:17:23,237 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 88 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2019-10-14 23:17:23,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2019-10-14 23:17:23,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 260. [2019-10-14 23:17:23,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 260 states. [2019-10-14 23:17:23,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 375 transitions. [2019-10-14 23:17:23,295 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 375 transitions. Word has length 102 [2019-10-14 23:17:23,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:17:23,295 INFO L462 AbstractCegarLoop]: Abstraction has 260 states and 375 transitions. [2019-10-14 23:17:23,295 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-10-14 23:17:23,295 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 375 transitions. [2019-10-14 23:17:23,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2019-10-14 23:17:23,297 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:17:23,297 INFO L380 BasicCegarLoop]: trace histogram [17, 16, 16, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:17:23,507 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:17:23,508 INFO L410 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:17:23,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:17:23,508 INFO L82 PathProgramCache]: Analyzing trace with hash -1563777377, now seen corresponding path program 3 times [2019-10-14 23:17:23,508 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:17:23,508 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66559441] [2019-10-14 23:17:23,508 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:23,509 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:23,509 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:17:23,514 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:17:23,514 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [435073726] [2019-10-14 23:17:23,514 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 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 [2019-10-14 23:17:23,555 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-10-14 23:17:23,555 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:17:23,556 INFO L256 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 30 conjunts are in the unsatisfiable core [2019-10-14 23:17:23,558 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:17:23,630 INFO L134 CoverageAnalysis]: Checked inductivity of 558 backedges. 81 proven. 32 refuted. 0 times theorem prover too weak. 445 trivial. 0 not checked. [2019-10-14 23:17:23,631 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66559441] [2019-10-14 23:17:23,631 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:17:23,631 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [435073726] [2019-10-14 23:17:23,631 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:17:23,631 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2019-10-14 23:17:23,631 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410391323] [2019-10-14 23:17:23,632 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-14 23:17:23,632 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:17:23,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-14 23:17:23,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2019-10-14 23:17:23,633 INFO L87 Difference]: Start difference. First operand 260 states and 375 transitions. Second operand 10 states. [2019-10-14 23:17:23,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:17:23,954 INFO L93 Difference]: Finished difference Result 273 states and 386 transitions. [2019-10-14 23:17:23,954 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-14 23:17:23,954 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 103 [2019-10-14 23:17:23,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:17:23,957 INFO L225 Difference]: With dead ends: 273 [2019-10-14 23:17:23,957 INFO L226 Difference]: Without dead ends: 271 [2019-10-14 23:17:23,958 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 93 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2019-10-14 23:17:23,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2019-10-14 23:17:23,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 268. [2019-10-14 23:17:23,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 268 states. [2019-10-14 23:17:23,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 381 transitions. [2019-10-14 23:17:23,993 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 381 transitions. Word has length 103 [2019-10-14 23:17:23,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:17:23,994 INFO L462 AbstractCegarLoop]: Abstraction has 268 states and 381 transitions. [2019-10-14 23:17:23,994 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-14 23:17:23,994 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 381 transitions. [2019-10-14 23:17:23,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2019-10-14 23:17:23,996 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:17:23,996 INFO L380 BasicCegarLoop]: trace histogram [18, 17, 17, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:17:24,200 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:17:24,200 INFO L410 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:17:24,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:17:24,201 INFO L82 PathProgramCache]: Analyzing trace with hash 822393669, now seen corresponding path program 4 times [2019-10-14 23:17:24,201 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:17:24,201 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326072928] [2019-10-14 23:17:24,201 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:24,201 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:24,202 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:17:24,206 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:17:24,207 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [682363541] [2019-10-14 23:17:24,207 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 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 [2019-10-14 23:17:24,259 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 23:17:24,259 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:17:24,260 INFO L256 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 42 conjunts are in the unsatisfiable core [2019-10-14 23:17:24,262 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:17:24,318 INFO L134 CoverageAnalysis]: Checked inductivity of 633 backedges. 70 proven. 105 refuted. 0 times theorem prover too weak. 458 trivial. 0 not checked. [2019-10-14 23:17:24,319 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326072928] [2019-10-14 23:17:24,319 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:17:24,319 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682363541] [2019-10-14 23:17:24,319 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:17:24,319 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2019-10-14 23:17:24,319 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812768716] [2019-10-14 23:17:24,320 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-14 23:17:24,320 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:17:24,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-14 23:17:24,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2019-10-14 23:17:24,321 INFO L87 Difference]: Start difference. First operand 268 states and 381 transitions. Second operand 10 states. [2019-10-14 23:17:24,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:17:24,625 INFO L93 Difference]: Finished difference Result 289 states and 398 transitions. [2019-10-14 23:17:24,625 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-14 23:17:24,625 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 111 [2019-10-14 23:17:24,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:17:24,627 INFO L225 Difference]: With dead ends: 289 [2019-10-14 23:17:24,628 INFO L226 Difference]: Without dead ends: 285 [2019-10-14 23:17:24,628 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2019-10-14 23:17:24,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2019-10-14 23:17:24,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 193. [2019-10-14 23:17:24,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2019-10-14 23:17:24,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 250 transitions. [2019-10-14 23:17:24,656 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 250 transitions. Word has length 111 [2019-10-14 23:17:24,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:17:24,657 INFO L462 AbstractCegarLoop]: Abstraction has 193 states and 250 transitions. [2019-10-14 23:17:24,657 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-14 23:17:24,657 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 250 transitions. [2019-10-14 23:17:24,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2019-10-14 23:17:24,659 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:17:24,659 INFO L380 BasicCegarLoop]: trace histogram [21, 20, 20, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:17:24,863 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:17:24,863 INFO L410 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:17:24,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:17:24,864 INFO L82 PathProgramCache]: Analyzing trace with hash 1081511953, now seen corresponding path program 5 times [2019-10-14 23:17:24,864 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:17:24,865 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526951887] [2019-10-14 23:17:24,865 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:24,865 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:24,866 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:17:24,871 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:17:24,872 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1140623224] [2019-10-14 23:17:24,872 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 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 [2019-10-14 23:17:24,952 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2019-10-14 23:17:24,952 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:17:24,954 INFO L256 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 52 conjunts are in the unsatisfiable core [2019-10-14 23:17:24,956 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:17:25,223 INFO L134 CoverageAnalysis]: Checked inductivity of 862 backedges. 45 proven. 114 refuted. 0 times theorem prover too weak. 703 trivial. 0 not checked. [2019-10-14 23:17:25,223 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526951887] [2019-10-14 23:17:25,223 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:17:25,224 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1140623224] [2019-10-14 23:17:25,224 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:17:25,224 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2019-10-14 23:17:25,224 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214438163] [2019-10-14 23:17:25,224 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-10-14 23:17:25,224 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:17:25,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-10-14 23:17:25,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2019-10-14 23:17:25,225 INFO L87 Difference]: Start difference. First operand 193 states and 250 transitions. Second operand 15 states. [2019-10-14 23:17:26,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:17:26,294 INFO L93 Difference]: Finished difference Result 257 states and 340 transitions. [2019-10-14 23:17:26,298 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-10-14 23:17:26,299 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 124 [2019-10-14 23:17:26,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:17:26,302 INFO L225 Difference]: With dead ends: 257 [2019-10-14 23:17:26,302 INFO L226 Difference]: Without dead ends: 254 [2019-10-14 23:17:26,303 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=70, Invalid=482, Unknown=0, NotChecked=0, Total=552 [2019-10-14 23:17:26,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2019-10-14 23:17:26,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 207. [2019-10-14 23:17:26,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 207 states. [2019-10-14 23:17:26,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 267 transitions. [2019-10-14 23:17:26,330 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 267 transitions. Word has length 124 [2019-10-14 23:17:26,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:17:26,331 INFO L462 AbstractCegarLoop]: Abstraction has 207 states and 267 transitions. [2019-10-14 23:17:26,331 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-10-14 23:17:26,331 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 267 transitions. [2019-10-14 23:17:26,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2019-10-14 23:17:26,333 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:17:26,333 INFO L380 BasicCegarLoop]: trace histogram [21, 20, 20, 6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:17:26,544 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:17:26,545 INFO L410 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:17:26,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:17:26,545 INFO L82 PathProgramCache]: Analyzing trace with hash -1556105536, now seen corresponding path program 5 times [2019-10-14 23:17:26,545 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:17:26,545 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966788759] [2019-10-14 23:17:26,546 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:26,546 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:26,546 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:17:26,552 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:17:26,553 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [458442022] [2019-10-14 23:17:26,553 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 [2019-10-14 23:17:26,624 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2019-10-14 23:17:26,624 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:17:26,625 INFO L256 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 23 conjunts are in the unsatisfiable core [2019-10-14 23:17:26,627 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:17:26,712 INFO L134 CoverageAnalysis]: Checked inductivity of 872 backedges. 80 proven. 24 refuted. 0 times theorem prover too weak. 768 trivial. 0 not checked. [2019-10-14 23:17:26,712 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966788759] [2019-10-14 23:17:26,713 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:17:26,713 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [458442022] [2019-10-14 23:17:26,713 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:17:26,713 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2019-10-14 23:17:26,713 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451599674] [2019-10-14 23:17:26,714 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-14 23:17:26,714 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:17:26,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-14 23:17:26,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2019-10-14 23:17:26,715 INFO L87 Difference]: Start difference. First operand 207 states and 267 transitions. Second operand 8 states. [2019-10-14 23:17:27,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:17:27,022 INFO L93 Difference]: Finished difference Result 220 states and 278 transitions. [2019-10-14 23:17:27,024 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-14 23:17:27,024 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 125 [2019-10-14 23:17:27,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:17:27,025 INFO L225 Difference]: With dead ends: 220 [2019-10-14 23:17:27,025 INFO L226 Difference]: Without dead ends: 218 [2019-10-14 23:17:27,026 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2019-10-14 23:17:27,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2019-10-14 23:17:27,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 215. [2019-10-14 23:17:27,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 215 states. [2019-10-14 23:17:27,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 273 transitions. [2019-10-14 23:17:27,057 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 273 transitions. Word has length 125 [2019-10-14 23:17:27,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:17:27,058 INFO L462 AbstractCegarLoop]: Abstraction has 215 states and 273 transitions. [2019-10-14 23:17:27,058 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-14 23:17:27,058 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 273 transitions. [2019-10-14 23:17:27,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2019-10-14 23:17:27,072 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:17:27,073 INFO L380 BasicCegarLoop]: trace histogram [25, 24, 24, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:17:27,276 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:17:27,276 INFO L410 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:17:27,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:17:27,276 INFO L82 PathProgramCache]: Analyzing trace with hash 1040748176, now seen corresponding path program 6 times [2019-10-14 23:17:27,277 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:17:27,277 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184917406] [2019-10-14 23:17:27,277 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:27,277 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:27,278 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:17:27,283 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:17:27,284 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2055059863] [2019-10-14 23:17:27,284 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 [2019-10-14 23:17:27,332 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-10-14 23:17:27,332 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:17:27,333 INFO L256 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 38 conjunts are in the unsatisfiable core [2019-10-14 23:17:27,336 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:17:27,416 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:17:27,469 INFO L134 CoverageAnalysis]: Checked inductivity of 1244 backedges. 107 proven. 32 refuted. 0 times theorem prover too weak. 1105 trivial. 0 not checked. [2019-10-14 23:17:27,470 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184917406] [2019-10-14 23:17:27,470 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:17:27,470 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2055059863] [2019-10-14 23:17:27,470 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:17:27,470 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2019-10-14 23:17:27,470 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660249207] [2019-10-14 23:17:27,471 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-14 23:17:27,471 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:17:27,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-14 23:17:27,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2019-10-14 23:17:27,472 INFO L87 Difference]: Start difference. First operand 215 states and 273 transitions. Second operand 10 states. [2019-10-14 23:17:27,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:17:27,749 INFO L93 Difference]: Finished difference Result 272 states and 355 transitions. [2019-10-14 23:17:27,749 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-14 23:17:27,749 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 146 [2019-10-14 23:17:27,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:17:27,751 INFO L225 Difference]: With dead ends: 272 [2019-10-14 23:17:27,751 INFO L226 Difference]: Without dead ends: 269 [2019-10-14 23:17:27,752 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2019-10-14 23:17:27,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2019-10-14 23:17:27,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 208. [2019-10-14 23:17:27,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2019-10-14 23:17:27,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 260 transitions. [2019-10-14 23:17:27,781 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 260 transitions. Word has length 146 [2019-10-14 23:17:27,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:17:27,783 INFO L462 AbstractCegarLoop]: Abstraction has 208 states and 260 transitions. [2019-10-14 23:17:27,783 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-14 23:17:27,783 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 260 transitions. [2019-10-14 23:17:27,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2019-10-14 23:17:27,786 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:17:27,787 INFO L380 BasicCegarLoop]: trace histogram [25, 24, 24, 7, 7, 6, 6, 6, 6, 6, 6, 6, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:17:27,990 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:17:27,990 INFO L410 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:17:27,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:17:27,990 INFO L82 PathProgramCache]: Analyzing trace with hash -218640321, now seen corresponding path program 6 times [2019-10-14 23:17:27,991 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:17:27,991 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399093485] [2019-10-14 23:17:27,991 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:27,991 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:27,991 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:17:28,000 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:17:28,000 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [101850712] [2019-10-14 23:17:28,001 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 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 [2019-10-14 23:17:28,071 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-10-14 23:17:28,071 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:17:28,072 INFO L256 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 24 conjunts are in the unsatisfiable core [2019-10-14 23:17:28,075 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:17:28,120 INFO L134 CoverageAnalysis]: Checked inductivity of 1256 backedges. 139 proven. 10 refuted. 0 times theorem prover too weak. 1107 trivial. 0 not checked. [2019-10-14 23:17:28,121 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399093485] [2019-10-14 23:17:28,121 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:17:28,121 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101850712] [2019-10-14 23:17:28,121 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:17:28,121 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2019-10-14 23:17:28,121 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026385786] [2019-10-14 23:17:28,122 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-14 23:17:28,122 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:17:28,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-14 23:17:28,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2019-10-14 23:17:28,122 INFO L87 Difference]: Start difference. First operand 208 states and 260 transitions. Second operand 7 states. [2019-10-14 23:17:28,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:17:28,228 INFO L93 Difference]: Finished difference Result 214 states and 265 transitions. [2019-10-14 23:17:28,229 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 23:17:28,229 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 147 [2019-10-14 23:17:28,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:17:28,231 INFO L225 Difference]: With dead ends: 214 [2019-10-14 23:17:28,231 INFO L226 Difference]: Without dead ends: 212 [2019-10-14 23:17:28,233 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 140 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2019-10-14 23:17:28,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2019-10-14 23:17:28,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 212. [2019-10-14 23:17:28,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 212 states. [2019-10-14 23:17:28,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 263 transitions. [2019-10-14 23:17:28,259 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 263 transitions. Word has length 147 [2019-10-14 23:17:28,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:17:28,259 INFO L462 AbstractCegarLoop]: Abstraction has 212 states and 263 transitions. [2019-10-14 23:17:28,259 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-14 23:17:28,259 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 263 transitions. [2019-10-14 23:17:28,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2019-10-14 23:17:28,261 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:17:28,261 INFO L380 BasicCegarLoop]: trace histogram [25, 24, 24, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:17:28,462 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:17:28,463 INFO L410 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:17:28,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:17:28,464 INFO L82 PathProgramCache]: Analyzing trace with hash 1300397831, now seen corresponding path program 7 times [2019-10-14 23:17:28,464 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:17:28,465 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981014010] [2019-10-14 23:17:28,465 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:28,465 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:28,465 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:17:28,475 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:17:28,475 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1496360638] [2019-10-14 23:17:28,475 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 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 [2019-10-14 23:17:28,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:17:28,546 INFO L256 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 67 conjunts are in the unsatisfiable core [2019-10-14 23:17:28,553 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:17:28,873 INFO L134 CoverageAnalysis]: Checked inductivity of 1249 backedges. 48 proven. 97 refuted. 0 times theorem prover too weak. 1104 trivial. 0 not checked. [2019-10-14 23:17:28,874 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981014010] [2019-10-14 23:17:28,874 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:17:28,874 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1496360638] [2019-10-14 23:17:28,874 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:17:28,875 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2019-10-14 23:17:28,875 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50219801] [2019-10-14 23:17:28,875 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-10-14 23:17:28,876 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:17:28,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-10-14 23:17:28,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2019-10-14 23:17:28,876 INFO L87 Difference]: Start difference. First operand 212 states and 263 transitions. Second operand 14 states. [2019-10-14 23:17:29,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:17:29,786 INFO L93 Difference]: Finished difference Result 273 states and 351 transitions. [2019-10-14 23:17:29,790 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-10-14 23:17:29,790 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 149 [2019-10-14 23:17:29,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:17:29,792 INFO L225 Difference]: With dead ends: 273 [2019-10-14 23:17:29,793 INFO L226 Difference]: Without dead ends: 270 [2019-10-14 23:17:29,793 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=57, Invalid=405, Unknown=0, NotChecked=0, Total=462 [2019-10-14 23:17:29,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2019-10-14 23:17:29,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 222. [2019-10-14 23:17:29,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 222 states. [2019-10-14 23:17:29,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 277 transitions. [2019-10-14 23:17:29,823 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 277 transitions. Word has length 149 [2019-10-14 23:17:29,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:17:29,824 INFO L462 AbstractCegarLoop]: Abstraction has 222 states and 277 transitions. [2019-10-14 23:17:29,824 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-10-14 23:17:29,824 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 277 transitions. [2019-10-14 23:17:29,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2019-10-14 23:17:29,825 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:17:29,825 INFO L380 BasicCegarLoop]: trace histogram [29, 28, 28, 7, 7, 7, 7, 7, 7, 7, 7, 7, 5, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:17:30,029 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:17:30,029 INFO L410 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:17:30,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:17:30,030 INFO L82 PathProgramCache]: Analyzing trace with hash -1997061882, now seen corresponding path program 8 times [2019-10-14 23:17:30,030 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:17:30,031 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182839959] [2019-10-14 23:17:30,031 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:30,031 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:30,031 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:17:30,037 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:17:30,037 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [895333824] [2019-10-14 23:17:30,037 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 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 [2019-10-14 23:17:30,124 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 23:17:30,124 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:17:30,126 INFO L256 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 71 conjunts are in the unsatisfiable core [2019-10-14 23:17:30,130 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:17:30,566 INFO L134 CoverageAnalysis]: Checked inductivity of 1701 backedges. 56 proven. 133 refuted. 0 times theorem prover too weak. 1512 trivial. 0 not checked. [2019-10-14 23:17:30,566 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182839959] [2019-10-14 23:17:30,567 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:17:30,567 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [895333824] [2019-10-14 23:17:30,567 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:17:30,567 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2019-10-14 23:17:30,567 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110020622] [2019-10-14 23:17:30,569 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-10-14 23:17:30,569 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:17:30,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-10-14 23:17:30,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2019-10-14 23:17:30,570 INFO L87 Difference]: Start difference. First operand 222 states and 277 transitions. Second operand 15 states. [2019-10-14 23:17:31,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:17:31,606 INFO L93 Difference]: Finished difference Result 284 states and 366 transitions. [2019-10-14 23:17:31,606 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-10-14 23:17:31,607 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 171 [2019-10-14 23:17:31,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:17:31,609 INFO L225 Difference]: With dead ends: 284 [2019-10-14 23:17:31,609 INFO L226 Difference]: Without dead ends: 281 [2019-10-14 23:17:31,610 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=63, Invalid=489, Unknown=0, NotChecked=0, Total=552 [2019-10-14 23:17:31,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2019-10-14 23:17:31,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 232. [2019-10-14 23:17:31,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232 states. [2019-10-14 23:17:31,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 291 transitions. [2019-10-14 23:17:31,640 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 291 transitions. Word has length 171 [2019-10-14 23:17:31,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:17:31,641 INFO L462 AbstractCegarLoop]: Abstraction has 232 states and 291 transitions. [2019-10-14 23:17:31,641 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-10-14 23:17:31,641 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 291 transitions. [2019-10-14 23:17:31,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2019-10-14 23:17:31,642 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:17:31,643 INFO L380 BasicCegarLoop]: trace histogram [29, 28, 28, 7, 7, 7, 7, 7, 7, 7, 7, 7, 5, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:17:31,846 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:17:31,847 INFO L410 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:17:31,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:17:31,847 INFO L82 PathProgramCache]: Analyzing trace with hash -1873117848, now seen corresponding path program 9 times [2019-10-14 23:17:31,848 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:17:31,848 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933687932] [2019-10-14 23:17:31,848 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:31,848 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:31,849 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:17:31,862 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:17:31,863 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [218962879] [2019-10-14 23:17:31,863 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 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 [2019-10-14 23:17:31,968 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-10-14 23:17:31,969 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:17:31,971 INFO L256 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 62 conjunts are in the unsatisfiable core [2019-10-14 23:17:31,976 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:17:32,237 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:17:32,326 INFO L134 CoverageAnalysis]: Checked inductivity of 1701 backedges. 127 proven. 99 refuted. 0 times theorem prover too weak. 1475 trivial. 0 not checked. [2019-10-14 23:17:32,326 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933687932] [2019-10-14 23:17:32,326 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:17:32,326 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [218962879] [2019-10-14 23:17:32,326 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:17:32,326 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2019-10-14 23:17:32,326 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340049211] [2019-10-14 23:17:32,327 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-14 23:17:32,327 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:17:32,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-14 23:17:32,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2019-10-14 23:17:32,327 INFO L87 Difference]: Start difference. First operand 232 states and 291 transitions. Second operand 13 states. [2019-10-14 23:17:32,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:17:32,946 INFO L93 Difference]: Finished difference Result 347 states and 449 transitions. [2019-10-14 23:17:32,947 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-14 23:17:32,947 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 171 [2019-10-14 23:17:32,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:17:32,950 INFO L225 Difference]: With dead ends: 347 [2019-10-14 23:17:32,950 INFO L226 Difference]: Without dead ends: 344 [2019-10-14 23:17:32,951 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2019-10-14 23:17:32,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2019-10-14 23:17:33,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 341. [2019-10-14 23:17:33,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 341 states. [2019-10-14 23:17:33,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 442 transitions. [2019-10-14 23:17:33,016 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 442 transitions. Word has length 171 [2019-10-14 23:17:33,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:17:33,017 INFO L462 AbstractCegarLoop]: Abstraction has 341 states and 442 transitions. [2019-10-14 23:17:33,017 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-10-14 23:17:33,017 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 442 transitions. [2019-10-14 23:17:33,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2019-10-14 23:17:33,019 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:17:33,019 INFO L380 BasicCegarLoop]: trace histogram [33, 32, 32, 8, 8, 8, 8, 8, 8, 8, 8, 8, 6, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:17:33,223 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:17:33,224 INFO L410 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:17:33,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:17:33,224 INFO L82 PathProgramCache]: Analyzing trace with hash 1096608197, now seen corresponding path program 10 times [2019-10-14 23:17:33,224 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:17:33,224 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178465108] [2019-10-14 23:17:33,225 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:33,225 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:33,225 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:17:33,233 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:17:33,233 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1500242607] [2019-10-14 23:17:33,233 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 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 [2019-10-14 23:17:33,331 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 23:17:33,331 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:17:33,334 INFO L256 TraceCheckSpWp]: Trace formula consists of 390 conjuncts, 79 conjunts are in the unsatisfiable core [2019-10-14 23:17:33,341 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:17:33,654 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:17:33,799 INFO L134 CoverageAnalysis]: Checked inductivity of 2223 backedges. 66 proven. 432 refuted. 0 times theorem prover too weak. 1725 trivial. 0 not checked. [2019-10-14 23:17:33,799 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178465108] [2019-10-14 23:17:33,800 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:17:33,800 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1500242607] [2019-10-14 23:17:33,801 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:17:33,802 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2019-10-14 23:17:33,802 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451436436] [2019-10-14 23:17:33,802 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-10-14 23:17:33,803 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:17:33,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-10-14 23:17:33,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2019-10-14 23:17:33,803 INFO L87 Difference]: Start difference. First operand 341 states and 442 transitions. Second operand 18 states. [2019-10-14 23:17:34,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:17:34,922 INFO L93 Difference]: Finished difference Result 487 states and 656 transitions. [2019-10-14 23:17:34,922 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-10-14 23:17:34,923 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 193 [2019-10-14 23:17:34,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:17:34,927 INFO L225 Difference]: With dead ends: 487 [2019-10-14 23:17:34,928 INFO L226 Difference]: Without dead ends: 484 [2019-10-14 23:17:34,929 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 175 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=100, Invalid=712, Unknown=0, NotChecked=0, Total=812 [2019-10-14 23:17:34,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 484 states. [2019-10-14 23:17:35,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 484 to 452. [2019-10-14 23:17:35,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 452 states. [2019-10-14 23:17:35,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 452 states to 452 states and 618 transitions. [2019-10-14 23:17:35,057 INFO L78 Accepts]: Start accepts. Automaton has 452 states and 618 transitions. Word has length 193 [2019-10-14 23:17:35,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:17:35,058 INFO L462 AbstractCegarLoop]: Abstraction has 452 states and 618 transitions. [2019-10-14 23:17:35,058 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-10-14 23:17:35,058 INFO L276 IsEmpty]: Start isEmpty. Operand 452 states and 618 transitions. [2019-10-14 23:17:35,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2019-10-14 23:17:35,061 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:17:35,062 INFO L380 BasicCegarLoop]: trace histogram [37, 36, 36, 9, 9, 9, 9, 9, 9, 9, 9, 9, 7, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:17:35,265 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:17:35,265 INFO L410 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:17:35,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:17:35,266 INFO L82 PathProgramCache]: Analyzing trace with hash 1469442372, now seen corresponding path program 11 times [2019-10-14 23:17:35,266 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:17:35,266 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900243112] [2019-10-14 23:17:35,266 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:35,266 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:35,267 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:17:35,271 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:17:35,271 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1723686230] [2019-10-14 23:17:35,272 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 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 [2019-10-14 23:17:35,408 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 21 check-sat command(s) [2019-10-14 23:17:35,408 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:17:35,410 INFO L256 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 83 conjunts are in the unsatisfiable core [2019-10-14 23:17:35,414 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:17:36,150 INFO L134 CoverageAnalysis]: Checked inductivity of 2815 backedges. 97 proven. 402 refuted. 0 times theorem prover too weak. 2316 trivial. 0 not checked. [2019-10-14 23:17:36,151 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900243112] [2019-10-14 23:17:36,151 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:17:36,151 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723686230] [2019-10-14 23:17:36,152 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:17:36,152 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2019-10-14 23:17:36,152 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727168094] [2019-10-14 23:17:36,152 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-10-14 23:17:36,153 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:17:36,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-10-14 23:17:36,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2019-10-14 23:17:36,154 INFO L87 Difference]: Start difference. First operand 452 states and 618 transitions. Second operand 21 states. [2019-10-14 23:17:37,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:17:37,620 INFO L93 Difference]: Finished difference Result 530 states and 739 transitions. [2019-10-14 23:17:37,620 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-10-14 23:17:37,621 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 215 [2019-10-14 23:17:37,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:17:37,624 INFO L225 Difference]: With dead ends: 530 [2019-10-14 23:17:37,624 INFO L226 Difference]: Without dead ends: 527 [2019-10-14 23:17:37,626 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 195 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=79, Invalid=623, Unknown=0, NotChecked=0, Total=702 [2019-10-14 23:17:37,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 527 states. [2019-10-14 23:17:37,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 527 to 458. [2019-10-14 23:17:37,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 458 states. [2019-10-14 23:17:37,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 458 states to 458 states and 629 transitions. [2019-10-14 23:17:37,723 INFO L78 Accepts]: Start accepts. Automaton has 458 states and 629 transitions. Word has length 215 [2019-10-14 23:17:37,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:17:37,723 INFO L462 AbstractCegarLoop]: Abstraction has 458 states and 629 transitions. [2019-10-14 23:17:37,723 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-10-14 23:17:37,724 INFO L276 IsEmpty]: Start isEmpty. Operand 458 states and 629 transitions. [2019-10-14 23:17:37,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2019-10-14 23:17:37,726 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:17:37,727 INFO L380 BasicCegarLoop]: trace histogram [41, 40, 40, 10, 10, 10, 10, 10, 10, 10, 10, 10, 8, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:17:37,930 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:17:37,930 INFO L410 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:17:37,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:17:37,931 INFO L82 PathProgramCache]: Analyzing trace with hash -1441747069, now seen corresponding path program 12 times [2019-10-14 23:17:37,931 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:17:37,931 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163101070] [2019-10-14 23:17:37,931 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:37,931 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:37,931 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:17:37,937 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:17:37,937 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [496761536] [2019-10-14 23:17:37,937 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 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 [2019-10-14 23:17:38,126 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-10-14 23:17:38,127 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:17:38,129 INFO L256 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 76 conjunts are in the unsatisfiable core [2019-10-14 23:17:38,133 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:17:38,349 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:17:38,450 INFO L134 CoverageAnalysis]: Checked inductivity of 3477 backedges. 227 proven. 337 refuted. 0 times theorem prover too weak. 2913 trivial. 0 not checked. [2019-10-14 23:17:38,450 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163101070] [2019-10-14 23:17:38,450 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:17:38,451 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496761536] [2019-10-14 23:17:38,451 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:17:38,451 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2019-10-14 23:17:38,451 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083398524] [2019-10-14 23:17:38,451 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-10-14 23:17:38,452 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:17:38,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-10-14 23:17:38,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2019-10-14 23:17:38,452 INFO L87 Difference]: Start difference. First operand 458 states and 629 transitions. Second operand 14 states. [2019-10-14 23:17:38,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:17:38,967 INFO L93 Difference]: Finished difference Result 541 states and 754 transitions. [2019-10-14 23:17:38,968 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-10-14 23:17:38,968 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 237 [2019-10-14 23:17:38,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:17:38,970 INFO L225 Difference]: With dead ends: 541 [2019-10-14 23:17:38,971 INFO L226 Difference]: Without dead ends: 538 [2019-10-14 23:17:38,971 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 223 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2019-10-14 23:17:38,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 538 states. [2019-10-14 23:17:39,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 538 to 452. [2019-10-14 23:17:39,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 452 states. [2019-10-14 23:17:39,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 452 states to 452 states and 618 transitions. [2019-10-14 23:17:39,074 INFO L78 Accepts]: Start accepts. Automaton has 452 states and 618 transitions. Word has length 237 [2019-10-14 23:17:39,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:17:39,075 INFO L462 AbstractCegarLoop]: Abstraction has 452 states and 618 transitions. [2019-10-14 23:17:39,075 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-10-14 23:17:39,075 INFO L276 IsEmpty]: Start isEmpty. Operand 452 states and 618 transitions. [2019-10-14 23:17:39,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2019-10-14 23:17:39,078 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:17:39,078 INFO L380 BasicCegarLoop]: trace histogram [45, 44, 44, 11, 11, 11, 11, 11, 11, 11, 11, 11, 9, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:17:39,281 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:17:39,281 INFO L410 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:17:39,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:17:39,282 INFO L82 PathProgramCache]: Analyzing trace with hash -49942842, now seen corresponding path program 13 times [2019-10-14 23:17:39,282 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:17:39,282 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129309973] [2019-10-14 23:17:39,282 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:39,282 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:39,283 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:17:39,292 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:17:39,292 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [782533646] [2019-10-14 23:17:39,292 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 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 [2019-10-14 23:17:39,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:17:39,404 INFO L256 TraceCheckSpWp]: Trace formula consists of 542 conjuncts, 87 conjunts are in the unsatisfiable core [2019-10-14 23:17:39,408 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:17:39,861 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:17:40,053 INFO L134 CoverageAnalysis]: Checked inductivity of 4209 backedges. 88 proven. 337 refuted. 0 times theorem prover too weak. 3784 trivial. 0 not checked. [2019-10-14 23:17:40,053 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129309973] [2019-10-14 23:17:40,054 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:17:40,054 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [782533646] [2019-10-14 23:17:40,054 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:17:40,054 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2019-10-14 23:17:40,054 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414183783] [2019-10-14 23:17:40,055 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-10-14 23:17:40,055 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:17:40,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-10-14 23:17:40,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2019-10-14 23:17:40,056 INFO L87 Difference]: Start difference. First operand 452 states and 618 transitions. Second operand 19 states. [2019-10-14 23:17:42,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:17:42,131 INFO L93 Difference]: Finished difference Result 614 states and 854 transitions. [2019-10-14 23:17:42,131 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-10-14 23:17:42,131 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 259 [2019-10-14 23:17:42,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:17:42,135 INFO L225 Difference]: With dead ends: 614 [2019-10-14 23:17:42,135 INFO L226 Difference]: Without dead ends: 611 [2019-10-14 23:17:42,136 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 241 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=87, Invalid=905, Unknown=0, NotChecked=0, Total=992 [2019-10-14 23:17:42,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 611 states. [2019-10-14 23:17:42,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 611 to 600. [2019-10-14 23:17:42,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 600 states. [2019-10-14 23:17:42,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 600 states to 600 states and 839 transitions. [2019-10-14 23:17:42,259 INFO L78 Accepts]: Start accepts. Automaton has 600 states and 839 transitions. Word has length 259 [2019-10-14 23:17:42,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:17:42,260 INFO L462 AbstractCegarLoop]: Abstraction has 600 states and 839 transitions. [2019-10-14 23:17:42,260 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-10-14 23:17:42,260 INFO L276 IsEmpty]: Start isEmpty. Operand 600 states and 839 transitions. [2019-10-14 23:17:42,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2019-10-14 23:17:42,264 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:17:42,264 INFO L380 BasicCegarLoop]: trace histogram [45, 44, 44, 11, 11, 11, 11, 11, 11, 11, 11, 11, 8, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:17:42,468 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:17:42,468 INFO L410 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:17:42,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:17:42,469 INFO L82 PathProgramCache]: Analyzing trace with hash 1905159983, now seen corresponding path program 14 times [2019-10-14 23:17:42,469 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:17:42,470 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690365509] [2019-10-14 23:17:42,470 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:42,471 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:42,471 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:17:42,476 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:17:42,476 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [946030660] [2019-10-14 23:17:42,476 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 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 [2019-10-14 23:17:42,592 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 23:17:42,592 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:17:42,594 INFO L256 TraceCheckSpWp]: Trace formula consists of 558 conjuncts, 101 conjunts are in the unsatisfiable core [2019-10-14 23:17:42,599 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:17:43,038 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:17:43,234 INFO L134 CoverageAnalysis]: Checked inductivity of 4217 backedges. 88 proven. 345 refuted. 0 times theorem prover too weak. 3784 trivial. 0 not checked. [2019-10-14 23:17:43,235 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690365509] [2019-10-14 23:17:43,235 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:17:43,235 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [946030660] [2019-10-14 23:17:43,235 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:17:43,235 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2019-10-14 23:17:43,235 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211032531] [2019-10-14 23:17:43,236 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-10-14 23:17:43,236 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:17:43,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-10-14 23:17:43,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2019-10-14 23:17:43,237 INFO L87 Difference]: Start difference. First operand 600 states and 839 transitions. Second operand 20 states. [2019-10-14 23:17:45,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:17:45,156 INFO L93 Difference]: Finished difference Result 763 states and 1076 transitions. [2019-10-14 23:17:45,157 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-10-14 23:17:45,157 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 262 [2019-10-14 23:17:45,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:17:45,160 INFO L225 Difference]: With dead ends: 763 [2019-10-14 23:17:45,160 INFO L226 Difference]: Without dead ends: 760 [2019-10-14 23:17:45,162 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 243 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=89, Invalid=967, Unknown=0, NotChecked=0, Total=1056 [2019-10-14 23:17:45,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 760 states. [2019-10-14 23:17:45,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 760 to 600. [2019-10-14 23:17:45,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 600 states. [2019-10-14 23:17:45,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 600 states to 600 states and 839 transitions. [2019-10-14 23:17:45,282 INFO L78 Accepts]: Start accepts. Automaton has 600 states and 839 transitions. Word has length 262 [2019-10-14 23:17:45,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:17:45,283 INFO L462 AbstractCegarLoop]: Abstraction has 600 states and 839 transitions. [2019-10-14 23:17:45,283 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-10-14 23:17:45,283 INFO L276 IsEmpty]: Start isEmpty. Operand 600 states and 839 transitions. [2019-10-14 23:17:45,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 282 [2019-10-14 23:17:45,287 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:17:45,287 INFO L380 BasicCegarLoop]: trace histogram [49, 48, 48, 12, 12, 12, 12, 12, 12, 12, 12, 12, 10, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:17:45,492 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:17:45,492 INFO L410 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:17:45,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:17:45,493 INFO L82 PathProgramCache]: Analyzing trace with hash 1085196165, now seen corresponding path program 15 times [2019-10-14 23:17:45,493 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:17:45,494 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317735414] [2019-10-14 23:17:45,495 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:45,495 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:45,495 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:17:45,505 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:17:45,506 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [709576900] [2019-10-14 23:17:45,506 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 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 [2019-10-14 23:17:45,619 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-10-14 23:17:45,620 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:17:45,622 INFO L256 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 67 conjunts are in the unsatisfiable core [2019-10-14 23:17:45,626 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:17:45,768 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:17:45,944 INFO L134 CoverageAnalysis]: Checked inductivity of 5011 backedges. 361 proven. 212 refuted. 0 times theorem prover too weak. 4438 trivial. 0 not checked. [2019-10-14 23:17:45,944 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317735414] [2019-10-14 23:17:45,944 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:17:45,944 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [709576900] [2019-10-14 23:17:45,944 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:17:45,945 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2019-10-14 23:17:45,945 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493964893] [2019-10-14 23:17:45,945 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-14 23:17:45,945 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:17:45,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-14 23:17:45,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2019-10-14 23:17:45,946 INFO L87 Difference]: Start difference. First operand 600 states and 839 transitions. Second operand 12 states.