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/cohencu.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-673a906-m [2019-10-02 11:33:27,570 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-02 11:33:27,572 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-02 11:33:27,584 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-02 11:33:27,584 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-02 11:33:27,585 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-02 11:33:27,587 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-02 11:33:27,589 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-02 11:33:27,590 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-02 11:33:27,591 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-02 11:33:27,592 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-02 11:33:27,594 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-02 11:33:27,594 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-02 11:33:27,595 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-02 11:33:27,596 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-02 11:33:27,597 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-02 11:33:27,598 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-02 11:33:27,599 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-02 11:33:27,601 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-02 11:33:27,603 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-02 11:33:27,605 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-02 11:33:27,606 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-02 11:33:27,608 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-02 11:33:27,608 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-02 11:33:27,611 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-02 11:33:27,614 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-02 11:33:27,615 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-02 11:33:27,616 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-02 11:33:27,617 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-02 11:33:27,618 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-02 11:33:27,618 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-02 11:33:27,619 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-02 11:33:27,619 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-02 11:33:27,619 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-02 11:33:27,620 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-02 11:33:27,621 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-02 11:33:27,621 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 [2019-10-02 11:33:27,636 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-02 11:33:27,637 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-02 11:33:27,638 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-02 11:33:27,638 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-02 11:33:27,638 INFO L138 SettingsManager]: * Use SBE=true [2019-10-02 11:33:27,638 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-02 11:33:27,639 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-02 11:33:27,639 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-02 11:33:27,639 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-02 11:33:27,639 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-02 11:33:27,639 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-02 11:33:27,640 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-02 11:33:27,640 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-02 11:33:27,640 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-02 11:33:27,640 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-02 11:33:27,640 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-02 11:33:27,641 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-02 11:33:27,641 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-02 11:33:27,641 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-02 11:33:27,641 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-02 11:33:27,641 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-02 11:33:27,642 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-02 11:33:27,642 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-02 11:33:27,642 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-02 11:33:27,642 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-02 11:33:27,643 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-02 11:33:27,643 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-02 11:33:27,643 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-02 11:33:27,643 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-02 11:33:27,673 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-02 11:33:27,689 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-02 11:33:27,695 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-02 11:33:27,696 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-02 11:33:27,697 INFO L275 PluginConnector]: CDTParser initialized [2019-10-02 11:33:27,699 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/cohencu.c [2019-10-02 11:33:27,776 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7ad4134cd/60e575ef530d412c92953797d9139b14/FLAG0e6cd8869 [2019-10-02 11:33:28,259 INFO L306 CDTParser]: Found 1 translation units. [2019-10-02 11:33:28,260 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/cohencu.c [2019-10-02 11:33:28,267 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7ad4134cd/60e575ef530d412c92953797d9139b14/FLAG0e6cd8869 [2019-10-02 11:33:28,626 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7ad4134cd/60e575ef530d412c92953797d9139b14 [2019-10-02 11:33:28,636 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-02 11:33:28,638 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-02 11:33:28,639 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-02 11:33:28,639 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-02 11:33:28,642 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-02 11:33:28,643 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.10 11:33:28" (1/1) ... [2019-10-02 11:33:28,646 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4975dbb3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 11:33:28, skipping insertion in model container [2019-10-02 11:33:28,647 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.10 11:33:28" (1/1) ... [2019-10-02 11:33:28,654 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-02 11:33:28,675 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-02 11:33:28,895 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-02 11:33:28,899 INFO L188 MainTranslator]: Completed pre-run [2019-10-02 11:33:28,925 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-02 11:33:28,941 INFO L192 MainTranslator]: Completed translation [2019-10-02 11:33:28,942 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 11:33:28 WrapperNode [2019-10-02 11:33:28,942 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-02 11:33:28,942 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-02 11:33:28,943 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-02 11:33:28,943 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-02 11:33:28,953 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 11:33:28" (1/1) ... [2019-10-02 11:33:28,953 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 11:33:28" (1/1) ... [2019-10-02 11:33:29,039 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 11:33:28" (1/1) ... [2019-10-02 11:33:29,039 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 11:33:28" (1/1) ... [2019-10-02 11:33:29,044 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 11:33:28" (1/1) ... [2019-10-02 11:33:29,055 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 11:33:28" (1/1) ... [2019-10-02 11:33:29,056 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 11:33:28" (1/1) ... [2019-10-02 11:33:29,058 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-02 11:33:29,059 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-02 11:33:29,059 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-02 11:33:29,059 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-02 11:33:29,060 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 11:33:28" (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 [2019-10-02 11:33:29,113 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-02 11:33:29,114 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-02 11:33:29,114 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-02 11:33:29,114 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-02 11:33:29,114 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-02 11:33:29,114 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-02 11:33:29,115 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-10-02 11:33:29,115 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-02 11:33:29,115 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-02 11:33:29,115 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-02 11:33:29,115 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-02 11:33:29,324 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-02 11:33:29,325 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-02 11:33:29,326 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 11:33:29 BoogieIcfgContainer [2019-10-02 11:33:29,326 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-02 11:33:29,327 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-02 11:33:29,328 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-02 11:33:29,331 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-02 11:33:29,331 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.10 11:33:28" (1/3) ... [2019-10-02 11:33:29,332 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e20ce6c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.10 11:33:29, skipping insertion in model container [2019-10-02 11:33:29,332 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 11:33:28" (2/3) ... [2019-10-02 11:33:29,332 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e20ce6c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.10 11:33:29, skipping insertion in model container [2019-10-02 11:33:29,333 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 11:33:29" (3/3) ... [2019-10-02 11:33:29,334 INFO L109 eAbstractionObserver]: Analyzing ICFG cohencu.c [2019-10-02 11:33:29,344 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-02 11:33:29,351 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-02 11:33:29,365 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-02 11:33:29,395 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2019-10-02 11:33:29,396 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-10-02 11:33:29,396 INFO L378 AbstractCegarLoop]: Hoare is true [2019-10-02 11:33:29,396 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-02 11:33:29,397 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-02 11:33:29,397 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-02 11:33:29,397 INFO L382 AbstractCegarLoop]: Difference is false [2019-10-02 11:33:29,397 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-02 11:33:29,397 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-02 11:33:29,413 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2019-10-02 11:33:29,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-10-02 11:33:29,417 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:33:29,418 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:33:29,420 INFO L418 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:33:29,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:33:29,425 INFO L82 PathProgramCache]: Analyzing trace with hash 2145967090, now seen corresponding path program 1 times [2019-10-02 11:33:29,426 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:33:29,427 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:33:29,471 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:33:29,471 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 11:33:29,471 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:33:29,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 11:33:29,533 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:33:29,534 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 11:33:29,535 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-10-02 11:33:29,539 INFO L454 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-02 11:33:29,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-02 11:33:29,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-02 11:33:29,558 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 2 states. [2019-10-02 11:33:29,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:33:29,587 INFO L93 Difference]: Finished difference Result 53 states and 90 transitions. [2019-10-02 11:33:29,588 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-02 11:33:29,589 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2019-10-02 11:33:29,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:33:29,597 INFO L225 Difference]: With dead ends: 53 [2019-10-02 11:33:29,598 INFO L226 Difference]: Without dead ends: 24 [2019-10-02 11:33:29,602 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-02 11:33:29,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-10-02 11:33:29,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2019-10-02 11:33:29,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-10-02 11:33:29,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2019-10-02 11:33:29,649 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 10 [2019-10-02 11:33:29,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:33:29,649 INFO L475 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2019-10-02 11:33:29,650 INFO L476 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-02 11:33:29,650 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2019-10-02 11:33:29,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-10-02 11:33:29,650 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:33:29,651 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:33:29,651 INFO L418 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:33:29,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:33:29,652 INFO L82 PathProgramCache]: Analyzing trace with hash 2134586928, now seen corresponding path program 1 times [2019-10-02 11:33:29,652 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:33:29,652 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:33:29,653 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:33:29,654 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 11:33:29,654 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:33:29,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 11:33:29,821 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:33:29,822 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 11:33:29,822 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-02 11:33:29,824 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-02 11:33:29,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-02 11:33:29,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-02 11:33:29,825 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 5 states. [2019-10-02 11:33:29,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:33:29,965 INFO L93 Difference]: Finished difference Result 30 states and 39 transitions. [2019-10-02 11:33:29,966 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-02 11:33:29,966 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2019-10-02 11:33:29,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:33:29,967 INFO L225 Difference]: With dead ends: 30 [2019-10-02 11:33:29,968 INFO L226 Difference]: Without dead ends: 28 [2019-10-02 11:33:29,969 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-02 11:33:29,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-10-02 11:33:29,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2019-10-02 11:33:29,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-10-02 11:33:29,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 37 transitions. [2019-10-02 11:33:29,991 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 37 transitions. Word has length 10 [2019-10-02 11:33:29,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:33:29,993 INFO L475 AbstractCegarLoop]: Abstraction has 28 states and 37 transitions. [2019-10-02 11:33:29,993 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-02 11:33:29,993 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 37 transitions. [2019-10-02 11:33:29,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-10-02 11:33:29,994 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:33:29,994 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:33:29,994 INFO L418 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:33:29,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:33:29,995 INFO L82 PathProgramCache]: Analyzing trace with hash 1496147284, now seen corresponding path program 1 times [2019-10-02 11:33:29,995 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:33:29,995 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:33:29,996 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:33:29,996 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 11:33:29,997 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:33:30,005 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:33:30,005 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:33:30,006 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP 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 [2019-10-02 11:33:30,022 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 11:33:30,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 11:33:30,057 INFO L256 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 17 conjunts are in the unsatisfiable core [2019-10-02 11:33:30,070 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:33:30,191 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:33:30,196 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:33:30,196 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2019-10-02 11:33:30,197 INFO L454 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-02 11:33:30,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-02 11:33:30,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-10-02 11:33:30,198 INFO L87 Difference]: Start difference. First operand 28 states and 37 transitions. Second operand 8 states. [2019-10-02 11:33:30,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:33:30,680 INFO L93 Difference]: Finished difference Result 51 states and 69 transitions. [2019-10-02 11:33:30,682 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-02 11:33:30,682 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 15 [2019-10-02 11:33:30,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:33:30,684 INFO L225 Difference]: With dead ends: 51 [2019-10-02 11:33:30,684 INFO L226 Difference]: Without dead ends: 49 [2019-10-02 11:33:30,685 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2019-10-02 11:33:30,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2019-10-02 11:33:30,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2019-10-02 11:33:30,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2019-10-02 11:33:30,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 66 transitions. [2019-10-02 11:33:30,714 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 66 transitions. Word has length 15 [2019-10-02 11:33:30,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:33:30,715 INFO L475 AbstractCegarLoop]: Abstraction has 48 states and 66 transitions. [2019-10-02 11:33:30,715 INFO L476 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-02 11:33:30,718 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 66 transitions. [2019-10-02 11:33:30,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-10-02 11:33:30,719 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:33:30,719 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:33:30,719 INFO L418 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:33:30,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:33:30,720 INFO L82 PathProgramCache]: Analyzing trace with hash 1472996464, now seen corresponding path program 1 times [2019-10-02 11:33:30,721 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:33:30,721 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:33:30,723 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:33:30,723 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 11:33:30,725 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:33:30,739 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:33:30,739 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:33:30,739 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP 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 [2019-10-02 11:33:30,761 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 11:33:30,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 11:33:30,776 INFO L256 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 17 conjunts are in the unsatisfiable core [2019-10-02 11:33:30,779 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:33:30,881 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-02 11:33:30,890 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:33:30,890 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2019-10-02 11:33:30,891 INFO L454 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-02 11:33:30,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-02 11:33:30,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-10-02 11:33:30,892 INFO L87 Difference]: Start difference. First operand 48 states and 66 transitions. Second operand 8 states. [2019-10-02 11:33:31,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:33:31,291 INFO L93 Difference]: Finished difference Result 55 states and 72 transitions. [2019-10-02 11:33:31,291 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-02 11:33:31,292 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 20 [2019-10-02 11:33:31,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:33:31,293 INFO L225 Difference]: With dead ends: 55 [2019-10-02 11:33:31,293 INFO L226 Difference]: Without dead ends: 53 [2019-10-02 11:33:31,294 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2019-10-02 11:33:31,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2019-10-02 11:33:31,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2019-10-02 11:33:31,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2019-10-02 11:33:31,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 69 transitions. [2019-10-02 11:33:31,307 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 69 transitions. Word has length 20 [2019-10-02 11:33:31,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:33:31,307 INFO L475 AbstractCegarLoop]: Abstraction has 52 states and 69 transitions. [2019-10-02 11:33:31,308 INFO L476 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-02 11:33:31,308 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 69 transitions. [2019-10-02 11:33:31,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-10-02 11:33:31,309 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:33:31,309 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:33:31,309 INFO L418 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:33:31,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:33:31,309 INFO L82 PathProgramCache]: Analyzing trace with hash -378433900, now seen corresponding path program 1 times [2019-10-02 11:33:31,310 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:33:31,310 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:33:31,311 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:33:31,311 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 11:33:31,311 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:33:31,317 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:33:31,317 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:33:31,317 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP 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 [2019-10-02 11:33:31,334 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 11:33:31,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 11:33:31,351 INFO L256 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 19 conjunts are in the unsatisfiable core [2019-10-02 11:33:31,356 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:33:31,431 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-02 11:33:31,434 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:33:31,435 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2019-10-02 11:33:31,435 INFO L454 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-02 11:33:31,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-02 11:33:31,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-10-02 11:33:31,436 INFO L87 Difference]: Start difference. First operand 52 states and 69 transitions. Second operand 8 states. [2019-10-02 11:33:31,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:33:31,863 INFO L93 Difference]: Finished difference Result 59 states and 75 transitions. [2019-10-02 11:33:31,863 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-02 11:33:31,863 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 25 [2019-10-02 11:33:31,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:33:31,864 INFO L225 Difference]: With dead ends: 59 [2019-10-02 11:33:31,864 INFO L226 Difference]: Without dead ends: 51 [2019-10-02 11:33:31,865 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2019-10-02 11:33:31,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2019-10-02 11:33:31,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2019-10-02 11:33:31,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2019-10-02 11:33:31,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 61 transitions. [2019-10-02 11:33:31,879 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 61 transitions. Word has length 25 [2019-10-02 11:33:31,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:33:31,879 INFO L475 AbstractCegarLoop]: Abstraction has 51 states and 61 transitions. [2019-10-02 11:33:31,879 INFO L476 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-02 11:33:31,879 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 61 transitions. [2019-10-02 11:33:31,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-10-02 11:33:31,881 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:33:31,881 INFO L411 BasicCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:33:31,881 INFO L418 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:33:31,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:33:31,884 INFO L82 PathProgramCache]: Analyzing trace with hash -1836902192, now seen corresponding path program 1 times [2019-10-02 11:33:31,884 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:33:31,885 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:33:31,886 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:33:31,886 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 11:33:31,886 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:33:31,892 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:33:31,892 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:33:31,892 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP 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) [2019-10-02 11:33:31,912 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 11:33:31,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 11:33:31,930 INFO L256 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 21 conjunts are in the unsatisfiable core [2019-10-02 11:33:31,933 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:33:32,028 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 11 proven. 19 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2019-10-02 11:33:32,032 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:33:32,033 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2019-10-02 11:33:32,033 INFO L454 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-02 11:33:32,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-02 11:33:32,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2019-10-02 11:33:32,034 INFO L87 Difference]: Start difference. First operand 51 states and 61 transitions. Second operand 8 states. [2019-10-02 11:33:32,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:33:32,379 INFO L93 Difference]: Finished difference Result 70 states and 90 transitions. [2019-10-02 11:33:32,380 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-02 11:33:32,380 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 42 [2019-10-02 11:33:32,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:33:32,381 INFO L225 Difference]: With dead ends: 70 [2019-10-02 11:33:32,381 INFO L226 Difference]: Without dead ends: 68 [2019-10-02 11:33:32,382 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2019-10-02 11:33:32,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2019-10-02 11:33:32,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 58. [2019-10-02 11:33:32,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2019-10-02 11:33:32,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 69 transitions. [2019-10-02 11:33:32,393 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 69 transitions. Word has length 42 [2019-10-02 11:33:32,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:33:32,394 INFO L475 AbstractCegarLoop]: Abstraction has 58 states and 69 transitions. [2019-10-02 11:33:32,394 INFO L476 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-02 11:33:32,394 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 69 transitions. [2019-10-02 11:33:32,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2019-10-02 11:33:32,396 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:33:32,396 INFO L411 BasicCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:33:32,396 INFO L418 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:33:32,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:33:32,396 INFO L82 PathProgramCache]: Analyzing trace with hash -223920524, now seen corresponding path program 2 times [2019-10-02 11:33:32,396 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:33:32,397 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:33:32,398 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:33:32,398 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 11:33:32,398 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:33:32,404 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:33:32,405 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:33:32,405 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP 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 [2019-10-02 11:33:32,428 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-10-02 11:33:32,446 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-02 11:33:32,446 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:33:32,447 INFO L256 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 25 conjunts are in the unsatisfiable core [2019-10-02 11:33:32,450 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:33:32,530 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 28 proven. 8 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2019-10-02 11:33:32,534 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:33:32,534 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2019-10-02 11:33:32,534 INFO L454 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-02 11:33:32,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-02 11:33:32,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2019-10-02 11:33:32,535 INFO L87 Difference]: Start difference. First operand 58 states and 69 transitions. Second operand 9 states. [2019-10-02 11:33:32,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:33:32,936 INFO L93 Difference]: Finished difference Result 78 states and 96 transitions. [2019-10-02 11:33:32,936 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-02 11:33:32,936 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 47 [2019-10-02 11:33:32,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:33:32,938 INFO L225 Difference]: With dead ends: 78 [2019-10-02 11:33:32,938 INFO L226 Difference]: Without dead ends: 75 [2019-10-02 11:33:32,938 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2019-10-02 11:33:32,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2019-10-02 11:33:32,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2019-10-02 11:33:32,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2019-10-02 11:33:32,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 92 transitions. [2019-10-02 11:33:32,952 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 92 transitions. Word has length 47 [2019-10-02 11:33:32,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:33:32,952 INFO L475 AbstractCegarLoop]: Abstraction has 75 states and 92 transitions. [2019-10-02 11:33:32,952 INFO L476 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-02 11:33:32,952 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 92 transitions. [2019-10-02 11:33:32,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2019-10-02 11:33:32,954 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:33:32,954 INFO L411 BasicCegarLoop]: trace histogram [10, 9, 9, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:33:32,954 INFO L418 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:33:32,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:33:32,955 INFO L82 PathProgramCache]: Analyzing trace with hash 1224693684, now seen corresponding path program 3 times [2019-10-02 11:33:32,955 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:33:32,955 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:33:32,956 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:33:32,956 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:33:32,957 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:33:32,963 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:33:32,963 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:33:32,963 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP 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 [2019-10-02 11:33:32,983 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-10-02 11:33:32,993 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-10-02 11:33:32,993 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:33:32,993 INFO L256 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 14 conjunts are in the unsatisfiable core [2019-10-02 11:33:32,996 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:33:33,029 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 18 proven. 6 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Exception during sending of exit command (exit): Broken pipe [2019-10-02 11:33:33,033 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:33:33,033 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2019-10-02 11:33:33,033 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-02 11:33:33,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-02 11:33:33,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-10-02 11:33:33,034 INFO L87 Difference]: Start difference. First operand 75 states and 92 transitions. Second operand 6 states. [2019-10-02 11:33:33,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:33:33,156 INFO L93 Difference]: Finished difference Result 85 states and 100 transitions. [2019-10-02 11:33:33,156 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-02 11:33:33,156 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 57 [2019-10-02 11:33:33,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:33:33,158 INFO L225 Difference]: With dead ends: 85 [2019-10-02 11:33:33,158 INFO L226 Difference]: Without dead ends: 82 [2019-10-02 11:33:33,159 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-02 11:33:33,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2019-10-02 11:33:33,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2019-10-02 11:33:33,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2019-10-02 11:33:33,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 96 transitions. [2019-10-02 11:33:33,172 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 96 transitions. Word has length 57 [2019-10-02 11:33:33,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:33:33,173 INFO L475 AbstractCegarLoop]: Abstraction has 82 states and 96 transitions. [2019-10-02 11:33:33,173 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-02 11:33:33,173 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 96 transitions. [2019-10-02 11:33:33,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2019-10-02 11:33:33,174 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:33:33,175 INFO L411 BasicCegarLoop]: trace histogram [12, 11, 11, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:33:33,175 INFO L418 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:33:33,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:33:33,175 INFO L82 PathProgramCache]: Analyzing trace with hash -1975458643, now seen corresponding path program 1 times [2019-10-02 11:33:33,175 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:33:33,175 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:33:33,177 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:33:33,177 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:33:33,177 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:33:33,183 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:33:33,183 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:33:33,183 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP 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 [2019-10-02 11:33:33,207 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 11:33:33,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 11:33:33,237 INFO L256 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 26 conjunts are in the unsatisfiable core [2019-10-02 11:33:33,245 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:33:33,382 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:33:33,421 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 21 proven. 38 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2019-10-02 11:33:33,424 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:33:33,425 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2019-10-02 11:33:33,426 INFO L454 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-02 11:33:33,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-02 11:33:33,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2019-10-02 11:33:33,427 INFO L87 Difference]: Start difference. First operand 82 states and 96 transitions. Second operand 9 states. [2019-10-02 11:33:33,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:33:33,767 INFO L93 Difference]: Finished difference Result 92 states and 104 transitions. [2019-10-02 11:33:33,768 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-02 11:33:33,768 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 68 [2019-10-02 11:33:33,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:33:33,770 INFO L225 Difference]: With dead ends: 92 [2019-10-02 11:33:33,771 INFO L226 Difference]: Without dead ends: 90 [2019-10-02 11:33:33,772 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2019-10-02 11:33:33,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2019-10-02 11:33:33,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2019-10-02 11:33:33,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2019-10-02 11:33:33,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 102 transitions. [2019-10-02 11:33:33,785 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 102 transitions. Word has length 68 [2019-10-02 11:33:33,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:33:33,785 INFO L475 AbstractCegarLoop]: Abstraction has 90 states and 102 transitions. [2019-10-02 11:33:33,785 INFO L476 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-02 11:33:33,786 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 102 transitions. [2019-10-02 11:33:33,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2019-10-02 11:33:33,787 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:33:33,787 INFO L411 BasicCegarLoop]: trace histogram [12, 11, 11, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:33:33,787 INFO L418 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:33:33,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:33:33,788 INFO L82 PathProgramCache]: Analyzing trace with hash -109766700, now seen corresponding path program 4 times [2019-10-02 11:33:33,788 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:33:33,788 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:33:33,789 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:33:33,789 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 11:33:33,790 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:33:33,795 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:33:33,795 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:33:33,795 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP 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 [2019-10-02 11:33:33,815 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-10-02 11:33:33,834 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-02 11:33:33,834 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:33:33,837 INFO L256 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 31 conjunts are in the unsatisfiable core [2019-10-02 11:33:33,841 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:33:33,933 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:33:33,963 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 36 proven. 67 refuted. 0 times theorem prover too weak. 152 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Exception during sending of exit command (exit): Broken pipe [2019-10-02 11:33:33,967 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:33:33,967 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2019-10-02 11:33:33,968 INFO L454 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-02 11:33:33,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-02 11:33:33,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2019-10-02 11:33:33,968 INFO L87 Difference]: Start difference. First operand 90 states and 102 transitions. Second operand 9 states. [2019-10-02 11:33:34,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:33:34,112 INFO L93 Difference]: Finished difference Result 96 states and 107 transitions. [2019-10-02 11:33:34,112 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-02 11:33:34,113 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 69 [2019-10-02 11:33:34,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:33:34,114 INFO L225 Difference]: With dead ends: 96 [2019-10-02 11:33:34,114 INFO L226 Difference]: Without dead ends: 94 [2019-10-02 11:33:34,115 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2019-10-02 11:33:34,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2019-10-02 11:33:34,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2019-10-02 11:33:34,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2019-10-02 11:33:34,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 105 transitions. [2019-10-02 11:33:34,128 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 105 transitions. Word has length 69 [2019-10-02 11:33:34,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:33:34,128 INFO L475 AbstractCegarLoop]: Abstraction has 94 states and 105 transitions. [2019-10-02 11:33:34,128 INFO L476 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-02 11:33:34,128 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 105 transitions. [2019-10-02 11:33:34,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2019-10-02 11:33:34,130 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:33:34,130 INFO L411 BasicCegarLoop]: trace histogram [13, 12, 12, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:33:34,130 INFO L418 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:33:34,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:33:34,130 INFO L82 PathProgramCache]: Analyzing trace with hash 713083767, now seen corresponding path program 1 times [2019-10-02 11:33:34,131 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:33:34,131 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:33:34,132 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:33:34,132 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:33:34,132 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:33:34,137 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:33:34,137 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:33:34,138 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP 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 [2019-10-02 11:33:34,156 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 11:33:34,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 11:33:34,179 INFO L256 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 24 conjunts are in the unsatisfiable core [2019-10-02 11:33:34,182 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:33:34,261 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:33:34,290 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 23 proven. 41 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Exception during sending of exit command (exit): Broken pipe [2019-10-02 11:33:34,294 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:33:34,295 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2019-10-02 11:33:34,297 INFO L454 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-02 11:33:34,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-02 11:33:34,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2019-10-02 11:33:34,298 INFO L87 Difference]: Start difference. First operand 94 states and 105 transitions. Second operand 9 states. [2019-10-02 11:33:34,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:33:34,642 INFO L93 Difference]: Finished difference Result 100 states and 110 transitions. [2019-10-02 11:33:34,642 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-02 11:33:34,643 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 73 [2019-10-02 11:33:34,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:33:34,645 INFO L225 Difference]: With dead ends: 100 [2019-10-02 11:33:34,645 INFO L226 Difference]: Without dead ends: 98 [2019-10-02 11:33:34,646 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2019-10-02 11:33:34,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2019-10-02 11:33:34,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2019-10-02 11:33:34,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2019-10-02 11:33:34,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 108 transitions. [2019-10-02 11:33:34,659 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 108 transitions. Word has length 73 [2019-10-02 11:33:34,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:33:34,659 INFO L475 AbstractCegarLoop]: Abstraction has 98 states and 108 transitions. [2019-10-02 11:33:34,659 INFO L476 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-02 11:33:34,660 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 108 transitions. [2019-10-02 11:33:34,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2019-10-02 11:33:34,661 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:33:34,661 INFO L411 BasicCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:33:34,662 INFO L418 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:33:34,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:33:34,662 INFO L82 PathProgramCache]: Analyzing trace with hash 1693450736, now seen corresponding path program 5 times [2019-10-02 11:33:34,662 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:33:34,662 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:33:34,664 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:33:34,664 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 11:33:34,664 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:33:34,669 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:33:34,669 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:33:34,670 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP 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 [2019-10-02 11:33:34,693 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-10-02 11:33:34,731 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2019-10-02 11:33:34,732 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:33:34,733 INFO L256 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 29 conjunts are in the unsatisfiable core [2019-10-02 11:33:34,735 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:33:34,822 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 23 proven. 49 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2019-10-02 11:33:34,828 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:33:34,828 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2019-10-02 11:33:34,830 INFO L454 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-02 11:33:34,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-02 11:33:34,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2019-10-02 11:33:34,832 INFO L87 Difference]: Start difference. First operand 98 states and 108 transitions. Second operand 9 states. [2019-10-02 11:33:35,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:33:35,399 INFO L93 Difference]: Finished difference Result 117 states and 137 transitions. [2019-10-02 11:33:35,400 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-02 11:33:35,400 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 74 [2019-10-02 11:33:35,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:33:35,401 INFO L225 Difference]: With dead ends: 117 [2019-10-02 11:33:35,401 INFO L226 Difference]: Without dead ends: 103 [2019-10-02 11:33:35,402 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2019-10-02 11:33:35,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2019-10-02 11:33:35,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 94. [2019-10-02 11:33:35,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2019-10-02 11:33:35,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 104 transitions. [2019-10-02 11:33:35,414 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 104 transitions. Word has length 74 [2019-10-02 11:33:35,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:33:35,415 INFO L475 AbstractCegarLoop]: Abstraction has 94 states and 104 transitions. [2019-10-02 11:33:35,415 INFO L476 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-02 11:33:35,415 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 104 transitions. [2019-10-02 11:33:35,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2019-10-02 11:33:35,416 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:33:35,416 INFO L411 BasicCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:33:35,416 INFO L418 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:33:35,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:33:35,417 INFO L82 PathProgramCache]: Analyzing trace with hash -1818484460, now seen corresponding path program 6 times [2019-10-02 11:33:35,417 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:33:35,417 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:33:35,418 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:33:35,419 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:33:35,419 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:33:35,424 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:33:35,424 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:33:35,424 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP 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 [2019-10-02 11:33:35,446 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-10-02 11:33:35,651 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2019-10-02 11:33:35,651 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:33:35,652 INFO L256 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 35 conjunts are in the unsatisfiable core [2019-10-02 11:33:35,654 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:33:35,770 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 55 proven. 24 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2019-10-02 11:33:35,773 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:33:35,774 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2019-10-02 11:33:35,774 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-02 11:33:35,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-02 11:33:35,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2019-10-02 11:33:35,775 INFO L87 Difference]: Start difference. First operand 94 states and 104 transitions. Second operand 10 states. [2019-10-02 11:33:36,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:33:36,215 INFO L93 Difference]: Finished difference Result 117 states and 132 transitions. [2019-10-02 11:33:36,215 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-02 11:33:36,215 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 79 [2019-10-02 11:33:36,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:33:36,216 INFO L225 Difference]: With dead ends: 117 [2019-10-02 11:33:36,217 INFO L226 Difference]: Without dead ends: 112 [2019-10-02 11:33:36,217 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2019-10-02 11:33:36,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2019-10-02 11:33:36,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2019-10-02 11:33:36,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2019-10-02 11:33:36,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 124 transitions. [2019-10-02 11:33:36,230 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 124 transitions. Word has length 79 [2019-10-02 11:33:36,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:33:36,231 INFO L475 AbstractCegarLoop]: Abstraction has 112 states and 124 transitions. [2019-10-02 11:33:36,231 INFO L476 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-02 11:33:36,231 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 124 transitions. [2019-10-02 11:33:36,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2019-10-02 11:33:36,232 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:33:36,232 INFO L411 BasicCegarLoop]: trace histogram [17, 16, 16, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:33:36,233 INFO L418 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:33:36,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:33:36,233 INFO L82 PathProgramCache]: Analyzing trace with hash -622434639, now seen corresponding path program 2 times [2019-10-02 11:33:36,233 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:33:36,233 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:33:36,235 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:33:36,235 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:33:36,235 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:33:36,240 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:33:36,240 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:33:36,240 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP 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 [2019-10-02 11:33:36,272 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-10-02 11:33:36,302 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-02 11:33:36,302 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:33:36,304 INFO L256 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 34 conjunts are in the unsatisfiable core [2019-10-02 11:33:36,309 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:33:36,391 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:33:36,424 INFO L134 CoverageAnalysis]: Checked inductivity of 533 backedges. 31 proven. 67 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Exception during sending of exit command (exit): Stream Closed [2019-10-02 11:33:36,435 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:33:36,436 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2019-10-02 11:33:36,436 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-02 11:33:36,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-02 11:33:36,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2019-10-02 11:33:36,437 INFO L87 Difference]: Start difference. First operand 112 states and 124 transitions. Second operand 10 states. [2019-10-02 11:33:36,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:33:36,843 INFO L93 Difference]: Finished difference Result 118 states and 129 transitions. [2019-10-02 11:33:36,843 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-02 11:33:36,844 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 95 [2019-10-02 11:33:36,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:33:36,845 INFO L225 Difference]: With dead ends: 118 [2019-10-02 11:33:36,846 INFO L226 Difference]: Without dead ends: 116 [2019-10-02 11:33:36,846 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 85 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2019-10-02 11:33:36,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2019-10-02 11:33:36,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2019-10-02 11:33:36,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2019-10-02 11:33:36,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 127 transitions. [2019-10-02 11:33:36,859 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 127 transitions. Word has length 95 [2019-10-02 11:33:36,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:33:36,860 INFO L475 AbstractCegarLoop]: Abstraction has 116 states and 127 transitions. [2019-10-02 11:33:36,860 INFO L476 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-02 11:33:36,860 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 127 transitions. [2019-10-02 11:33:36,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2019-10-02 11:33:36,861 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:33:36,861 INFO L411 BasicCegarLoop]: trace histogram [18, 17, 17, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:33:36,862 INFO L418 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:33:36,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:33:36,862 INFO L82 PathProgramCache]: Analyzing trace with hash 1439689715, now seen corresponding path program 2 times [2019-10-02 11:33:36,862 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:33:36,862 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:33:36,864 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:33:36,864 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:33:36,864 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:33:36,869 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:33:36,869 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:33:36,870 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP 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 [2019-10-02 11:33:36,893 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-10-02 11:33:36,923 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-02 11:33:36,923 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:33:36,924 INFO L256 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 30 conjunts are in the unsatisfiable core [2019-10-02 11:33:36,927 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:33:37,016 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:33:37,069 INFO L134 CoverageAnalysis]: Checked inductivity of 599 backedges. 33 proven. 70 refuted. 0 times theorem prover too weak. 496 trivial. 0 not checked. [2019-10-02 11:33:37,082 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:33:37,082 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2019-10-02 11:33:37,083 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-02 11:33:37,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-02 11:33:37,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2019-10-02 11:33:37,083 INFO L87 Difference]: Start difference. First operand 116 states and 127 transitions. Second operand 10 states. [2019-10-02 11:33:37,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:33:37,628 INFO L93 Difference]: Finished difference Result 126 states and 135 transitions. [2019-10-02 11:33:37,629 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-02 11:33:37,629 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 100 [2019-10-02 11:33:37,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:33:37,630 INFO L225 Difference]: With dead ends: 126 [2019-10-02 11:33:37,630 INFO L226 Difference]: Without dead ends: 113 [2019-10-02 11:33:37,631 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 90 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2019-10-02 11:33:37,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2019-10-02 11:33:37,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2019-10-02 11:33:37,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2019-10-02 11:33:37,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 121 transitions. [2019-10-02 11:33:37,641 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 121 transitions. Word has length 100 [2019-10-02 11:33:37,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:33:37,642 INFO L475 AbstractCegarLoop]: Abstraction has 113 states and 121 transitions. [2019-10-02 11:33:37,642 INFO L476 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-02 11:33:37,642 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 121 transitions. [2019-10-02 11:33:37,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2019-10-02 11:33:37,643 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:33:37,644 INFO L411 BasicCegarLoop]: trace histogram [18, 17, 17, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:33:37,644 INFO L418 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:33:37,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:33:37,644 INFO L82 PathProgramCache]: Analyzing trace with hash -1551568652, now seen corresponding path program 7 times [2019-10-02 11:33:37,644 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:33:37,644 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:33:37,646 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:33:37,646 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:33:37,646 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:33:37,651 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:33:37,651 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:33:37,651 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP 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) [2019-10-02 11:33:37,674 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 11:33:37,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 11:33:37,703 INFO L256 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 37 conjunts are in the unsatisfiable core [2019-10-02 11:33:37,706 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:33:37,793 INFO L134 CoverageAnalysis]: Checked inductivity of 611 backedges. 33 proven. 82 refuted. 0 times theorem prover too weak. 496 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Exception during sending of exit command (exit): Stream closed [2019-10-02 11:33:37,802 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:33:37,802 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2019-10-02 11:33:37,803 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-02 11:33:37,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-02 11:33:37,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2019-10-02 11:33:37,803 INFO L87 Difference]: Start difference. First operand 113 states and 121 transitions. Second operand 10 states. [2019-10-02 11:33:38,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:33:38,367 INFO L93 Difference]: Finished difference Result 132 states and 150 transitions. [2019-10-02 11:33:38,367 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-02 11:33:38,368 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 101 [2019-10-02 11:33:38,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:33:38,369 INFO L225 Difference]: With dead ends: 132 [2019-10-02 11:33:38,369 INFO L226 Difference]: Without dead ends: 130 [2019-10-02 11:33:38,370 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 91 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2019-10-02 11:33:38,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2019-10-02 11:33:38,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 121. [2019-10-02 11:33:38,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2019-10-02 11:33:38,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 131 transitions. [2019-10-02 11:33:38,381 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 131 transitions. Word has length 101 [2019-10-02 11:33:38,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:33:38,381 INFO L475 AbstractCegarLoop]: Abstraction has 121 states and 131 transitions. [2019-10-02 11:33:38,381 INFO L476 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-02 11:33:38,381 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 131 transitions. [2019-10-02 11:33:38,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2019-10-02 11:33:38,383 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:33:38,383 INFO L411 BasicCegarLoop]: trace histogram [19, 18, 18, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:33:38,383 INFO L418 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:33:38,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:33:38,384 INFO L82 PathProgramCache]: Analyzing trace with hash 781710480, now seen corresponding path program 8 times [2019-10-02 11:33:38,384 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:33:38,384 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:33:38,385 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:33:38,385 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 11:33:38,385 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:33:38,390 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:33:38,391 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:33:38,391 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP 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 [2019-10-02 11:33:38,426 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-10-02 11:33:38,457 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-02 11:33:38,457 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:33:38,459 INFO L256 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 43 conjunts are in the unsatisfiable core [2019-10-02 11:33:38,461 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:33:38,585 INFO L134 CoverageAnalysis]: Checked inductivity of 684 backedges. 80 proven. 43 refuted. 0 times theorem prover too weak. 561 trivial. 0 not checked. [2019-10-02 11:33:38,598 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:33:38,598 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2019-10-02 11:33:38,599 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-02 11:33:38,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-02 11:33:38,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2019-10-02 11:33:38,599 INFO L87 Difference]: Start difference. First operand 121 states and 131 transitions. Second operand 11 states. [2019-10-02 11:33:39,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:33:39,076 INFO L93 Difference]: Finished difference Result 144 states and 159 transitions. [2019-10-02 11:33:39,076 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-02 11:33:39,077 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 106 [2019-10-02 11:33:39,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:33:39,078 INFO L225 Difference]: With dead ends: 144 [2019-10-02 11:33:39,078 INFO L226 Difference]: Without dead ends: 139 [2019-10-02 11:33:39,078 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2019-10-02 11:33:39,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2019-10-02 11:33:39,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2019-10-02 11:33:39,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2019-10-02 11:33:39,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 151 transitions. [2019-10-02 11:33:39,089 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 151 transitions. Word has length 106 [2019-10-02 11:33:39,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:33:39,089 INFO L475 AbstractCegarLoop]: Abstraction has 139 states and 151 transitions. [2019-10-02 11:33:39,090 INFO L476 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-02 11:33:39,090 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 151 transitions. [2019-10-02 11:33:39,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2019-10-02 11:33:39,091 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:33:39,091 INFO L411 BasicCegarLoop]: trace histogram [22, 21, 21, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:33:39,092 INFO L418 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:33:39,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:33:39,092 INFO L82 PathProgramCache]: Analyzing trace with hash 874758701, now seen corresponding path program 3 times [2019-10-02 11:33:39,092 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:33:39,092 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:33:39,093 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:33:39,093 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:33:39,094 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:33:39,099 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:33:39,099 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:33:39,099 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP 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 [2019-10-02 11:33:39,115 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2