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/bresenham.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-673a906-m [2019-10-02 11:33:23,774 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-02 11:33:23,777 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-02 11:33:23,796 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-02 11:33:23,797 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-02 11:33:23,798 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-02 11:33:23,800 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-02 11:33:23,813 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-02 11:33:23,816 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-02 11:33:23,817 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-02 11:33:23,819 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-02 11:33:23,822 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2019-10-02 11:33:23,859 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-02 11:33:23,860 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-02 11:33:23,862 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-02 11:33:23,863 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 11:33:23,880 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-02 11:33:23,880 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-02 11:33:23,881 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-02 11:33:23,881 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-02 11:33:23,881 INFO L138 SettingsManager]: * Use SBE=true [2019-10-02 11:33:23,882 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-02 11:33:23,882 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-02 11:33:23,882 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-02 11:33:23,882 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-02 11:33:23,882 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-02 11:33:23,883 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-02 11:33:23,883 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-02 11:33:23,883 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-02 11:33:23,883 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-02 11:33:23,883 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-02 11:33:23,884 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-02 11:33:23,884 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-02 11:33:23,884 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-02 11:33:23,884 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-02 11:33:23,884 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-02 11:33:23,885 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-02 11:33:23,885 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-02 11:33:23,885 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-02 11:33:23,885 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-02 11:33:23,886 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-02 11:33:23,886 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-02 11:33:23,886 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-02 11:33:23,886 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-02 11:33:23,886 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-02 11:33:23,913 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-02 11:33:23,925 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-02 11:33:23,928 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-02 11:33:23,929 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-02 11:33:23,930 INFO L275 PluginConnector]: CDTParser initialized [2019-10-02 11:33:23,930 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/bresenham.c [2019-10-02 11:33:23,985 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/103a62fbc/9b4a98a219284667baba7f54e200de47/FLAG34de489ec [2019-10-02 11:33:24,416 INFO L306 CDTParser]: Found 1 translation units. [2019-10-02 11:33:24,417 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/bresenham.c [2019-10-02 11:33:24,424 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/103a62fbc/9b4a98a219284667baba7f54e200de47/FLAG34de489ec [2019-10-02 11:33:24,825 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/103a62fbc/9b4a98a219284667baba7f54e200de47 [2019-10-02 11:33:24,835 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-02 11:33:24,837 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-02 11:33:24,838 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-02 11:33:24,838 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-02 11:33:24,841 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-02 11:33:24,842 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.10 11:33:24" (1/1) ... [2019-10-02 11:33:24,845 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@36edca5e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 11:33:24, skipping insertion in model container [2019-10-02 11:33:24,846 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.10 11:33:24" (1/1) ... [2019-10-02 11:33:24,853 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-02 11:33:24,872 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-02 11:33:25,049 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-02 11:33:25,054 INFO L188 MainTranslator]: Completed pre-run [2019-10-02 11:33:25,087 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-02 11:33:25,103 INFO L192 MainTranslator]: Completed translation [2019-10-02 11:33:25,104 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 11:33:25 WrapperNode [2019-10-02 11:33:25,104 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-02 11:33:25,105 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-02 11:33:25,105 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-02 11:33:25,105 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-02 11:33:25,204 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 11:33:25" (1/1) ... [2019-10-02 11:33:25,204 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 11:33:25" (1/1) ... [2019-10-02 11:33:25,209 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 11:33:25" (1/1) ... [2019-10-02 11:33:25,209 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 11:33:25" (1/1) ... [2019-10-02 11:33:25,213 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 11:33:25" (1/1) ... [2019-10-02 11:33:25,218 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 11:33:25" (1/1) ... [2019-10-02 11:33:25,219 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 11:33:25" (1/1) ... [2019-10-02 11:33:25,220 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-02 11:33:25,221 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-02 11:33:25,221 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-02 11:33:25,221 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-02 11:33:25,222 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 11:33:25" (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 11:33:25,273 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-02 11:33:25,273 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-02 11:33:25,273 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-02 11:33:25,273 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-02 11:33:25,274 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-02 11:33:25,274 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-02 11:33:25,274 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-10-02 11:33:25,274 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-02 11:33:25,274 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-02 11:33:25,274 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-02 11:33:25,274 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-02 11:33:25,456 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-02 11:33:25,456 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-02 11:33:25,457 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 11:33:25 BoogieIcfgContainer [2019-10-02 11:33:25,458 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-02 11:33:25,466 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-02 11:33:25,466 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-02 11:33:25,475 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-02 11:33:25,476 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.10 11:33:24" (1/3) ... [2019-10-02 11:33:25,477 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ca50111 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.10 11:33:25, skipping insertion in model container [2019-10-02 11:33:25,477 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 11:33:25" (2/3) ... [2019-10-02 11:33:25,478 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ca50111 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.10 11:33:25, skipping insertion in model container [2019-10-02 11:33:25,478 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 11:33:25" (3/3) ... [2019-10-02 11:33:25,487 INFO L109 eAbstractionObserver]: Analyzing ICFG bresenham.c [2019-10-02 11:33:25,515 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-02 11:33:25,531 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-02 11:33:25,569 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-02 11:33:25,602 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2019-10-02 11:33:25,603 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-10-02 11:33:25,603 INFO L378 AbstractCegarLoop]: Hoare is true [2019-10-02 11:33:25,603 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-02 11:33:25,604 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-02 11:33:25,604 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-02 11:33:25,604 INFO L382 AbstractCegarLoop]: Difference is false [2019-10-02 11:33:25,604 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-02 11:33:25,604 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-02 11:33:25,619 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2019-10-02 11:33:25,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-10-02 11:33:25,623 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:33:25,624 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:33:25,626 INFO L418 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:33:25,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:33:25,630 INFO L82 PathProgramCache]: Analyzing trace with hash 1560104174, now seen corresponding path program 1 times [2019-10-02 11:33:25,632 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:33:25,632 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:33:25,681 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:33:25,682 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 11:33:25,682 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:33:25,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 11:33:25,744 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 11:33:25,746 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 11:33:25,746 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-10-02 11:33:25,749 INFO L454 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-02 11:33:25,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-02 11:33:25,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-02 11:33:25,762 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 2 states. [2019-10-02 11:33:25,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:33:25,787 INFO L93 Difference]: Finished difference Result 39 states and 51 transitions. [2019-10-02 11:33:25,787 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-02 11:33:25,788 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2019-10-02 11:33:25,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:33:25,798 INFO L225 Difference]: With dead ends: 39 [2019-10-02 11:33:25,798 INFO L226 Difference]: Without dead ends: 17 [2019-10-02 11:33:25,801 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 11:33:25,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2019-10-02 11:33:25,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2019-10-02 11:33:25,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-10-02 11:33:25,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2019-10-02 11:33:25,835 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 10 [2019-10-02 11:33:25,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:33:25,836 INFO L475 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2019-10-02 11:33:25,836 INFO L476 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-02 11:33:25,836 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2019-10-02 11:33:25,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-10-02 11:33:25,837 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:33:25,837 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:33:25,837 INFO L418 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:33:25,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:33:25,838 INFO L82 PathProgramCache]: Analyzing trace with hash 1561891634, now seen corresponding path program 1 times [2019-10-02 11:33:25,838 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:33:25,838 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:33:25,840 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:33:25,840 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 11:33:25,840 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:33:25,848 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:33:25,848 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:33:25,848 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 11:33:25,873 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 11:33:25,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 11:33:25,902 INFO L256 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 12 conjunts are in the unsatisfiable core [2019-10-02 11:33:25,909 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:33:25,986 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 11:33:25,989 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 11:33:25,990 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-02 11:33:25,991 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-02 11:33:25,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-02 11:33:25,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-02 11:33:25,992 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand 5 states. [2019-10-02 11:33:26,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:33:26,074 INFO L93 Difference]: Finished difference Result 28 states and 32 transitions. [2019-10-02 11:33:26,075 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-02 11:33:26,075 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2019-10-02 11:33:26,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:33:26,077 INFO L225 Difference]: With dead ends: 28 [2019-10-02 11:33:26,077 INFO L226 Difference]: Without dead ends: 25 [2019-10-02 11:33:26,079 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-02 11:33:26,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-10-02 11:33:26,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2019-10-02 11:33:26,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-10-02 11:33:26,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2019-10-02 11:33:26,088 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 10 [2019-10-02 11:33:26,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:33:26,089 INFO L475 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2019-10-02 11:33:26,089 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-02 11:33:26,089 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2019-10-02 11:33:26,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-10-02 11:33:26,090 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:33:26,090 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:33:26,090 INFO L418 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:33:26,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:33:26,091 INFO L82 PathProgramCache]: Analyzing trace with hash 1038075816, now seen corresponding path program 1 times [2019-10-02 11:33:26,091 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:33:26,092 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:33:26,093 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:33:26,093 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 11:33:26,094 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:33:26,100 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:33:26,100 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:33:26,101 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 11:33:26,123 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 11:33:26,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 11:33:26,149 INFO L256 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 23 conjunts are in the unsatisfiable core [2019-10-02 11:33:26,154 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:33:26,320 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:33:26,324 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:33:26,324 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2019-10-02 11:33:26,324 INFO L454 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-02 11:33:26,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-02 11:33:26,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2019-10-02 11:33:26,325 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 9 states. [2019-10-02 11:33:26,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:33:26,523 INFO L93 Difference]: Finished difference Result 37 states and 42 transitions. [2019-10-02 11:33:26,523 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-02 11:33:26,524 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 19 [2019-10-02 11:33:26,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:33:26,525 INFO L225 Difference]: With dead ends: 37 [2019-10-02 11:33:26,525 INFO L226 Difference]: Without dead ends: 34 [2019-10-02 11:33:26,526 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2019-10-02 11:33:26,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-10-02 11:33:26,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2019-10-02 11:33:26,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-10-02 11:33:26,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2019-10-02 11:33:26,545 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 19 [2019-10-02 11:33:26,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:33:26,545 INFO L475 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2019-10-02 11:33:26,545 INFO L476 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-02 11:33:26,546 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2019-10-02 11:33:26,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-10-02 11:33:26,546 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:33:26,547 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:33:26,547 INFO L418 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:33:26,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:33:26,547 INFO L82 PathProgramCache]: Analyzing trace with hash -1481884118, now seen corresponding path program 1 times [2019-10-02 11:33:26,548 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:33:26,548 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:33:26,550 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:33:26,551 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 11:33:26,551 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:33:26,561 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:33:26,561 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:33:26,561 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) [2019-10-02 11:33:26,583 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 11:33:26,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 11:33:26,600 INFO L256 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 25 conjunts are in the unsatisfiable core [2019-10-02 11:33:26,603 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:33:26,748 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:33:26,752 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:33:26,753 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2019-10-02 11:33:26,753 INFO L454 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-02 11:33:26,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-02 11:33:26,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2019-10-02 11:33:26,754 INFO L87 Difference]: Start difference. First operand 33 states and 36 transitions. Second operand 9 states. [2019-10-02 11:33:26,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:33:26,929 INFO L93 Difference]: Finished difference Result 45 states and 50 transitions. [2019-10-02 11:33:26,931 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-02 11:33:26,931 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 19 [2019-10-02 11:33:26,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:33:26,932 INFO L225 Difference]: With dead ends: 45 [2019-10-02 11:33:26,933 INFO L226 Difference]: Without dead ends: 43 [2019-10-02 11:33:26,936 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2019-10-02 11:33:26,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-10-02 11:33:26,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 40. [2019-10-02 11:33:26,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-10-02 11:33:26,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 43 transitions. [2019-10-02 11:33:26,952 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 43 transitions. Word has length 19 [2019-10-02 11:33:26,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:33:26,952 INFO L475 AbstractCegarLoop]: Abstraction has 40 states and 43 transitions. [2019-10-02 11:33:26,952 INFO L476 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-02 11:33:26,952 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 43 transitions. [2019-10-02 11:33:26,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-10-02 11:33:26,956 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:33:26,956 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:33:26,956 INFO L418 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:33:26,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:33:26,957 INFO L82 PathProgramCache]: Analyzing trace with hash 190103611, now seen corresponding path program 1 times [2019-10-02 11:33:26,957 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:33:26,957 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:33:26,959 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:33:26,960 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 11:33:26,961 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:33:26,976 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:33:26,976 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:33:26,977 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) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 11:33:27,010 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 11:33:27,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 11:33:27,030 INFO L256 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 25 conjunts are in the unsatisfiable core [2019-10-02 11:33:27,033 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:33:27,183 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:33:27,226 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-02 11:33:27,231 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:33:27,232 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2019-10-02 11:33:27,232 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-02 11:33:27,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-02 11:33:27,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2019-10-02 11:33:27,234 INFO L87 Difference]: Start difference. First operand 40 states and 43 transitions. Second operand 11 states. [2019-10-02 11:33:27,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:33:27,379 INFO L93 Difference]: Finished difference Result 49 states and 53 transitions. [2019-10-02 11:33:27,379 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-02 11:33:27,379 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 25 [2019-10-02 11:33:27,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:33:27,381 INFO L225 Difference]: With dead ends: 49 [2019-10-02 11:33:27,381 INFO L226 Difference]: Without dead ends: 42 [2019-10-02 11:33:27,381 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2019-10-02 11:33:27,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2019-10-02 11:33:27,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 33. [2019-10-02 11:33:27,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-10-02 11:33:27,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2019-10-02 11:33:27,388 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 25 [2019-10-02 11:33:27,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:33:27,389 INFO L475 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2019-10-02 11:33:27,389 INFO L476 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-02 11:33:27,389 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2019-10-02 11:33:27,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-10-02 11:33:27,390 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:33:27,390 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:33:27,391 INFO L418 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:33:27,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:33:27,391 INFO L82 PathProgramCache]: Analyzing trace with hash -775079950, now seen corresponding path program 2 times [2019-10-02 11:33:27,391 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:33:27,392 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:33:27,393 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:33:27,393 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 11:33:27,393 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:33:27,397 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:33:27,398 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:33:27,398 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) [2019-10-02 11:33:27,419 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 11:33:27,435 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-02 11:33:27,436 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:33:27,437 INFO L256 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 32 conjunts are in the unsatisfiable core [2019-10-02 11:33:27,439 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:33:27,580 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-02 11:33:27,584 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:33:27,584 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2019-10-02 11:33:27,585 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-02 11:33:27,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-02 11:33:27,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2019-10-02 11:33:27,586 INFO L87 Difference]: Start difference. First operand 33 states and 36 transitions. Second operand 11 states. [2019-10-02 11:33:27,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:33:27,798 INFO L93 Difference]: Finished difference Result 54 states and 60 transitions. [2019-10-02 11:33:27,798 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-02 11:33:27,799 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 28 [2019-10-02 11:33:27,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:33:27,800 INFO L225 Difference]: With dead ends: 54 [2019-10-02 11:33:27,800 INFO L226 Difference]: Without dead ends: 51 [2019-10-02 11:33:27,801 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2019-10-02 11:33:27,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2019-10-02 11:33:27,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 42. [2019-10-02 11:33:27,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-10-02 11:33:27,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2019-10-02 11:33:27,809 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 28 [2019-10-02 11:33:27,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:33:27,810 INFO L475 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2019-10-02 11:33:27,810 INFO L476 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-02 11:33:27,810 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2019-10-02 11:33:27,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-10-02 11:33:27,811 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:33:27,811 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:33:27,812 INFO L418 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:33:27,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:33:27,812 INFO L82 PathProgramCache]: Analyzing trace with hash 999927412, now seen corresponding path program 1 times [2019-10-02 11:33:27,812 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:33:27,813 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:33:27,814 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:33:27,814 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:33:27,815 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:33:27,819 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:33:27,819 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:33:27,819 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 11:33:27,858 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 11:33:27,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 11:33:27,873 INFO L256 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 32 conjunts are in the unsatisfiable core [2019-10-02 11:33:27,874 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:33:28,028 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-02 11:33:28,032 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:33:28,032 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2019-10-02 11:33:28,032 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-02 11:33:28,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-02 11:33:28,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2019-10-02 11:33:28,033 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand 11 states. [2019-10-02 11:33:28,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:33:28,207 INFO L93 Difference]: Finished difference Result 54 states and 60 transitions. [2019-10-02 11:33:28,207 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-02 11:33:28,207 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 28 [2019-10-02 11:33:28,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:33:28,209 INFO L225 Difference]: With dead ends: 54 [2019-10-02 11:33:28,209 INFO L226 Difference]: Without dead ends: 52 [2019-10-02 11:33:28,209 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2019-10-02 11:33:28,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2019-10-02 11:33:28,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 49. [2019-10-02 11:33:28,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2019-10-02 11:33:28,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 53 transitions. [2019-10-02 11:33:28,217 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 53 transitions. Word has length 28 [2019-10-02 11:33:28,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:33:28,218 INFO L475 AbstractCegarLoop]: Abstraction has 49 states and 53 transitions. [2019-10-02 11:33:28,218 INFO L476 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-02 11:33:28,218 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 53 transitions. [2019-10-02 11:33:28,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-10-02 11:33:28,220 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:33:28,220 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:33:28,220 INFO L418 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:33:28,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:33:28,220 INFO L82 PathProgramCache]: Analyzing trace with hash -1796148304, now seen corresponding path program 2 times [2019-10-02 11:33:28,221 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:33:28,221 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:33:28,222 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:33:28,222 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 11:33:28,222 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:33:28,226 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:33:28,226 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:33:28,226 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 11:33:28,268 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-10-02 11:33:28,285 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-02 11:33:28,285 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:33:28,286 WARN L254 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 34 conjunts are in the unsatisfiable core [2019-10-02 11:33:28,291 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:33:28,417 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-02 11:33:28,421 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:33:28,421 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2019-10-02 11:33:28,422 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-02 11:33:28,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-02 11:33:28,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2019-10-02 11:33:28,423 INFO L87 Difference]: Start difference. First operand 49 states and 53 transitions. Second operand 11 states. [2019-10-02 11:33:28,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:33:28,593 INFO L93 Difference]: Finished difference Result 70 states and 77 transitions. [2019-10-02 11:33:28,594 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-02 11:33:28,594 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 28 [2019-10-02 11:33:28,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:33:28,597 INFO L225 Difference]: With dead ends: 70 [2019-10-02 11:33:28,597 INFO L226 Difference]: Without dead ends: 68 [2019-10-02 11:33:28,598 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2019-10-02 11:33:28,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2019-10-02 11:33:28,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 58. [2019-10-02 11:33:28,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2019-10-02 11:33:28,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 63 transitions. [2019-10-02 11:33:28,606 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 63 transitions. Word has length 28 [2019-10-02 11:33:28,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:33:28,607 INFO L475 AbstractCegarLoop]: Abstraction has 58 states and 63 transitions. [2019-10-02 11:33:28,607 INFO L476 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-02 11:33:28,607 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 63 transitions. [2019-10-02 11:33:28,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-10-02 11:33:28,608 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:33:28,608 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:33:28,608 INFO L418 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:33:28,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:33:28,609 INFO L82 PathProgramCache]: Analyzing trace with hash -21140942, now seen corresponding path program 2 times [2019-10-02 11:33:28,609 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:33:28,609 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:33:28,610 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:33:28,610 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:33:28,611 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:33:28,615 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:33:28,615 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:33:28,615 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 11:33:28,633 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-10-02 11:33:28,647 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-02 11:33:28,647 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:33:28,648 INFO L256 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 29 conjunts are in the unsatisfiable core [2019-10-02 11:33:28,651 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:33:28,762 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-02 11:33:28,765 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:33:28,766 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2019-10-02 11:33:28,766 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-02 11:33:28,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-02 11:33:28,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2019-10-02 11:33:28,767 INFO L87 Difference]: Start difference. First operand 58 states and 63 transitions. Second operand 11 states. [2019-10-02 11:33:28,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:33:28,983 INFO L93 Difference]: Finished difference Result 70 states and 77 transitions. [2019-10-02 11:33:28,983 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-02 11:33:28,983 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 28 [2019-10-02 11:33:28,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:33:28,986 INFO L225 Difference]: With dead ends: 70 [2019-10-02 11:33:28,986 INFO L226 Difference]: Without dead ends: 68 [2019-10-02 11:33:28,986 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2019-10-02 11:33:28,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2019-10-02 11:33:28,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 58. [2019-10-02 11:33:28,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2019-10-02 11:33:28,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 63 transitions. [2019-10-02 11:33:28,995 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 63 transitions. Word has length 28 [2019-10-02 11:33:28,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:33:28,996 INFO L475 AbstractCegarLoop]: Abstraction has 58 states and 63 transitions. [2019-10-02 11:33:28,996 INFO L476 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-02 11:33:28,996 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 63 transitions. [2019-10-02 11:33:28,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-10-02 11:33:28,997 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:33:28,997 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:33:28,998 INFO L418 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:33:28,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:33:28,998 INFO L82 PathProgramCache]: Analyzing trace with hash 1039880453, now seen corresponding path program 1 times [2019-10-02 11:33:28,998 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:33:28,998 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:33:29,000 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:33:29,000 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:33:29,000 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:33:29,003 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:33:29,003 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:33:29,004 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 11:33:29,028 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 11:33:29,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 11:33:29,048 INFO L256 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-02 11:33:29,050 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:33:29,190 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-02 11:33:29,195 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:33:29,196 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2019-10-02 11:33:29,196 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-02 11:33:29,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-02 11:33:29,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-02 11:33:29,197 INFO L87 Difference]: Start difference. First operand 58 states and 63 transitions. Second operand 7 states. [2019-10-02 11:33:29,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:33:29,352 INFO L93 Difference]: Finished difference Result 71 states and 78 transitions. [2019-10-02 11:33:29,352 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-02 11:33:29,353 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 34 [2019-10-02 11:33:29,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:33:29,354 INFO L225 Difference]: With dead ends: 71 [2019-10-02 11:33:29,354 INFO L226 Difference]: Without dead ends: 64 [2019-10-02 11:33:29,355 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-02 11:33:29,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2019-10-02 11:33:29,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 61. [2019-10-02 11:33:29,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2019-10-02 11:33:29,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 67 transitions. [2019-10-02 11:33:29,366 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 67 transitions. Word has length 34 [2019-10-02 11:33:29,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:33:29,367 INFO L475 AbstractCegarLoop]: Abstraction has 61 states and 67 transitions. [2019-10-02 11:33:29,367 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-02 11:33:29,367 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 67 transitions. [2019-10-02 11:33:29,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-10-02 11:33:29,369 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:33:29,369 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:33:29,369 INFO L418 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:33:29,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:33:29,370 INFO L82 PathProgramCache]: Analyzing trace with hash 1845541185, now seen corresponding path program 2 times [2019-10-02 11:33:29,370 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:33:29,370 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:33:29,371 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:33:29,372 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 11:33:29,372 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:33:29,375 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:33:29,375 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:33:29,376 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 11:33:29,397 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-10-02 11:33:29,410 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-02 11:33:29,410 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:33:29,411 INFO L256 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-02 11:33:29,413 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:33:29,515 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-02 11:33:29,518 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:33:29,518 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2019-10-02 11:33:29,519 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-02 11:33:29,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-02 11:33:29,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-02 11:33:29,520 INFO L87 Difference]: Start difference. First operand 61 states and 67 transitions. Second operand 7 states. [2019-10-02 11:33:29,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:33:29,759 INFO L93 Difference]: Finished difference Result 74 states and 82 transitions. [2019-10-02 11:33:29,761 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-02 11:33:29,761 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 34 [2019-10-02 11:33:29,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:33:29,763 INFO L225 Difference]: With dead ends: 74 [2019-10-02 11:33:29,763 INFO L226 Difference]: Without dead ends: 67 [2019-10-02 11:33:29,764 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-02 11:33:29,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2019-10-02 11:33:29,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 61. [2019-10-02 11:33:29,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2019-10-02 11:33:29,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 67 transitions. [2019-10-02 11:33:29,774 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 67 transitions. Word has length 34 [2019-10-02 11:33:29,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:33:29,774 INFO L475 AbstractCegarLoop]: Abstraction has 61 states and 67 transitions. [2019-10-02 11:33:29,774 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-02 11:33:29,774 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 67 transitions. [2019-10-02 11:33:29,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-10-02 11:33:29,776 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:33:29,776 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:33:29,776 INFO L418 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:33:29,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:33:29,776 INFO L82 PathProgramCache]: Analyzing trace with hash 1258735171, now seen corresponding path program 2 times [2019-10-02 11:33:29,777 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:33:29,777 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:33:29,778 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:33:29,778 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:33:29,779 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:33:29,782 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:33:29,782 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:33:29,782 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 11:33:29,805 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-10-02 11:33:29,826 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-02 11:33:29,826 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:33:29,827 INFO L256 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 28 conjunts are in the unsatisfiable core [2019-10-02 11:33:29,829 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:33:30,083 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:33:30,114 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 11 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-02 11:33:30,118 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:33:30,119 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2019-10-02 11:33:30,120 INFO L454 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-10-02 11:33:30,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-10-02 11:33:30,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2019-10-02 11:33:30,120 INFO L87 Difference]: Start difference. First operand 61 states and 67 transitions. Second operand 14 states. [2019-10-02 11:33:30,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:33:30,370 INFO L93 Difference]: Finished difference Result 70 states and 77 transitions. [2019-10-02 11:33:30,371 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-10-02 11:33:30,371 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 34 [2019-10-02 11:33:30,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:33:30,373 INFO L225 Difference]: With dead ends: 70 [2019-10-02 11:33:30,373 INFO L226 Difference]: Without dead ends: 63 [2019-10-02 11:33:30,374 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2019-10-02 11:33:30,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2019-10-02 11:33:30,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 42. [2019-10-02 11:33:30,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-10-02 11:33:30,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2019-10-02 11:33:30,381 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 34 [2019-10-02 11:33:30,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:33:30,381 INFO L475 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2019-10-02 11:33:30,381 INFO L476 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-10-02 11:33:30,382 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2019-10-02 11:33:30,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-10-02 11:33:30,383 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:33:30,383 INFO L411 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:33:30,383 INFO L418 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:33:30,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:33:30,384 INFO L82 PathProgramCache]: Analyzing trace with hash 389577448, now seen corresponding path program 3 times [2019-10-02 11:33:30,384 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:33:30,384 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:33:30,385 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:33:30,385 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:33:30,386 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:33:30,389 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:33:30,389 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:33:30,389 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 11:33:30,414 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-10-02 11:33:30,426 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-10-02 11:33:30,426 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:33:30,427 INFO L256 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 21 conjunts are in the unsatisfiable core [2019-10-02 11:33:30,428 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:33:30,496 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:33:30,520 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 23 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-02 11:33:30,523 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:33:30,523 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2019-10-02 11:33:30,524 INFO L454 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-02 11:33:30,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-02 11:33:30,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2019-10-02 11:33:30,524 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand 9 states. [2019-10-02 11:33:30,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:33:30,617 INFO L93 Difference]: Finished difference Result 71 states and 78 transitions. [2019-10-02 11:33:30,617 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-02 11:33:30,617 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 37 [2019-10-02 11:33:30,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:33:30,619 INFO L225 Difference]: With dead ends: 71 [2019-10-02 11:33:30,619 INFO L226 Difference]: Without dead ends: 68 [2019-10-02 11:33:30,619 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2019-10-02 11:33:30,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2019-10-02 11:33:30,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 60. [2019-10-02 11:33:30,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2019-10-02 11:33:30,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 66 transitions. [2019-10-02 11:33:30,628 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 66 transitions. Word has length 37 [2019-10-02 11:33:30,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:33:30,628 INFO L475 AbstractCegarLoop]: Abstraction has 60 states and 66 transitions. [2019-10-02 11:33:30,628 INFO L476 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-02 11:33:30,628 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 66 transitions. [2019-10-02 11:33:30,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-10-02 11:33:30,629 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:33:30,630 INFO L411 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:33:30,630 INFO L418 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:33:30,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:33:30,630 INFO L82 PathProgramCache]: Analyzing trace with hash -2130382486, now seen corresponding path program 3 times [2019-10-02 11:33:30,630 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:33:30,630 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:33:30,632 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:33:30,632 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:33:30,632 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:33:30,635 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:33:30,635 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:33:30,636 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 11:33:30,657 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-10-02 11:33:30,670 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-10-02 11:33:30,670 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:33:30,671 INFO L256 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 23 conjunts are in the unsatisfiable core [2019-10-02 11:33:30,673 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:33:30,743 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:33:30,775 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 15 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-02 11:33:30,779 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:33:30,779 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2019-10-02 11:33:30,780 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-02 11:33:30,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-02 11:33:30,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2019-10-02 11:33:30,781 INFO L87 Difference]: Start difference. First operand 60 states and 66 transitions. Second operand 10 states. [2019-10-02 11:33:30,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:33:30,925 INFO L93 Difference]: Finished difference Result 80 states and 88 transitions. [2019-10-02 11:33:30,925 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-02 11:33:30,925 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 37 [2019-10-02 11:33:30,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:33:30,927 INFO L225 Difference]: With dead ends: 80 [2019-10-02 11:33:30,927 INFO L226 Difference]: Without dead ends: 78 [2019-10-02 11:33:30,927 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2019-10-02 11:33:30,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2019-10-02 11:33:30,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 77. [2019-10-02 11:33:30,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2019-10-02 11:33:30,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 85 transitions. [2019-10-02 11:33:30,938 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 85 transitions. Word has length 37 [2019-10-02 11:33:30,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:33:30,938 INFO L475 AbstractCegarLoop]: Abstraction has 77 states and 85 transitions. [2019-10-02 11:33:30,938 INFO L476 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-02 11:33:30,939 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 85 transitions. [2019-10-02 11:33:30,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-10-02 11:33:30,940 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:33:30,941 INFO L411 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:33:30,941 INFO L418 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:33:30,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:33:30,941 INFO L82 PathProgramCache]: Analyzing trace with hash 1143516456, now seen corresponding path program 4 times [2019-10-02 11:33:30,941 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:33:30,942 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:33:30,943 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:33:30,943 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:33:30,943 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:33:30,946 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:33:30,946 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:33:30,947 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) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 11:33:30,969 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-10-02 11:33:30,982 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-02 11:33:30,983 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:33:30,984 INFO L256 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 26 conjunts are in the unsatisfiable core [2019-10-02 11:33:30,985 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:33:49,222 WARN L191 SmtUtils]: Spent 2.01 s on a formula simplification that was a NOOP. DAG size: 38 [2019-10-02 11:33:57,392 WARN L191 SmtUtils]: Spent 2.01 s on a formula simplification that was a NOOP. DAG size: 41 [2019-10-02 11:34:09,581 WARN L191 SmtUtils]: Spent 2.01 s on a formula simplification that was a NOOP. DAG size: 42 [2019-10-02 11:34:09,585 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:34:09,671 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 13 proven. 5 refuted. 15 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-02 11:34:09,674 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:34:09,675 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2019-10-02 11:34:09,675 INFO L454 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-02 11:34:09,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-02 11:34:09,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=91, Unknown=18, NotChecked=0, Total=132 [2019-10-02 11:34:09,676 INFO L87 Difference]: Start difference. First operand 77 states and 85 transitions. Second operand 12 states. [2019-10-02 11:34:24,314 WARN L191 SmtUtils]: Spent 6.05 s on a formula simplification that was a NOOP. DAG size: 43 [2019-10-02 11:34:51,913 WARN L191 SmtUtils]: Spent 4.03 s on a formula simplification that was a NOOP. DAG size: 52 [2019-10-02 11:35:14,353 WARN L191 SmtUtils]: Spent 6.21 s on a formula simplification. DAG size of input: 57 DAG size of output: 48 [2019-10-02 11:35:49,296 WARN L191 SmtUtils]: Spent 4.08 s on a formula simplification that was a NOOP. DAG size: 27 [2019-10-02 11:36:17,640 WARN L191 SmtUtils]: Spent 12.22 s on a formula simplification. DAG size of input: 58 DAG size of output: 58 [2019-10-02 11:37:21,695 WARN L191 SmtUtils]: Spent 4.01 s on a formula simplification that was a NOOP. DAG size: 39 [2019-10-02 11:37:58,003 WARN L191 SmtUtils]: Spent 4.01 s on a formula simplification that was a NOOP. DAG size: 52 [2019-10-02 11:38:40,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:38:40,718 INFO L93 Difference]: Finished difference Result 110 states and 130 transitions. [2019-10-02 11:38:40,718 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-10-02 11:38:40,718 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 37 [2019-10-02 11:38:40,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:38:40,719 INFO L225 Difference]: With dead ends: 110 [2019-10-02 11:38:40,719 INFO L226 Difference]: Without dead ends: 108 [2019-10-02 11:38:40,720 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 174.0s TimeCoverageRelationStatistics Valid=73, Invalid=276, Unknown=71, NotChecked=0, Total=420 [2019-10-02 11:38:40,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2019-10-02 11:38:40,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 103. [2019-10-02 11:38:40,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2019-10-02 11:38:40,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 121 transitions. [2019-10-02 11:38:40,739 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 121 transitions. Word has length 37 [2019-10-02 11:38:40,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:38:40,739 INFO L475 AbstractCegarLoop]: Abstraction has 103 states and 121 transitions. [2019-10-02 11:38:40,739 INFO L476 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-02 11:38:40,739 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 121 transitions. [2019-10-02 11:38:40,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-10-02 11:38:40,740 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:38:40,741 INFO L411 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:38:40,741 INFO L418 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:38:40,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:38:40,741 INFO L82 PathProgramCache]: Analyzing trace with hash -1989833876, now seen corresponding path program 5 times [2019-10-02 11:38:40,741 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:38:40,741 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:38:40,743 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:38:40,743 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:38:40,743 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:38:40,746 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:38:40,746 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:38:40,746 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 11:38:40,771 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-10-02 11:38:40,790 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-10-02 11:38:40,790 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:38:40,791 WARN L254 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 43 conjunts are in the unsatisfiable core [2019-10-02 11:38:40,793 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:38:41,001 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 24 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-02 11:38:41,004 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:38:41,004 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2019-10-02 11:38:41,004 INFO L454 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-10-02 11:38:41,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-10-02 11:38:41,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2019-10-02 11:38:41,005 INFO L87 Difference]: Start difference. First operand 103 states and 121 transitions. Second operand 14 states. [2019-10-02 11:38:41,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:38:41,288 INFO L93 Difference]: Finished difference Result 120 states and 140 transitions. [2019-10-02 11:38:41,288 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-10-02 11:38:41,288 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 37 [2019-10-02 11:38:41,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:38:41,290 INFO L225 Difference]: With dead ends: 120 [2019-10-02 11:38:41,290 INFO L226 Difference]: Without dead ends: 118 [2019-10-02 11:38:41,290 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2019-10-02 11:38:41,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2019-10-02 11:38:41,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 115. [2019-10-02 11:38:41,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2019-10-02 11:38:41,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 133 transitions. [2019-10-02 11:38:41,306 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 133 transitions. Word has length 37 [2019-10-02 11:38:41,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:38:41,306 INFO L475 AbstractCegarLoop]: Abstraction has 115 states and 133 transitions. [2019-10-02 11:38:41,306 INFO L476 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-10-02 11:38:41,306 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 133 transitions. [2019-10-02 11:38:41,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-10-02 11:38:41,307 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:38:41,307 INFO L411 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:38:41,308 INFO L418 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:38:41,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:38:41,308 INFO L82 PathProgramCache]: Analyzing trace with hash -490942296, now seen corresponding path program 6 times [2019-10-02 11:38:41,308 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:38:41,308 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:38:41,309 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:38:41,309 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:38:41,310 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:38:41,312 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:38:41,312 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:38:41,313 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 11:38:41,337 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-10-02 11:38:41,358 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-10-02 11:38:41,358 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:38:41,360 INFO L256 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 31 conjunts are in the unsatisfiable core [2019-10-02 11:38:41,362 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:38:41,445 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:38:41,476 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 18 proven. 13 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-10-02 11:38:41,480 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:38:41,480 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2019-10-02 11:38:41,480 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-02 11:38:41,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-02 11:38:41,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2019-10-02 11:38:41,481 INFO L87 Difference]: Start difference. First operand 115 states and 133 transitions. Second operand 10 states. [2019-10-02 11:38:41,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:38:41,662 INFO L93 Difference]: Finished difference Result 121 states and 138 transitions. [2019-10-02 11:38:41,662 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-02 11:38:41,663 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 37 [2019-10-02 11:38:41,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:38:41,664 INFO L225 Difference]: With dead ends: 121 [2019-10-02 11:38:41,664 INFO L226 Difference]: Without dead ends: 117 [2019-10-02 11:38:41,665 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2019-10-02 11:38:41,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2019-10-02 11:38:41,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 62. [2019-10-02 11:38:41,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2019-10-02 11:38:41,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 67 transitions. [2019-10-02 11:38:41,686 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 67 transitions. Word has length 37 [2019-10-02 11:38:41,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:38:41,687 INFO L475 AbstractCegarLoop]: Abstraction has 62 states and 67 transitions. [2019-10-02 11:38:41,687 INFO L476 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-02 11:38:41,687 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 67 transitions. [2019-10-02 11:38:41,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2019-10-02 11:38:41,688 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:38:41,688 INFO L411 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:38:41,689 INFO L418 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:38:41,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:38:41,689 INFO L82 PathProgramCache]: Analyzing trace with hash -1213594757, now seen corresponding path program 3 times [2019-10-02 11:38:41,689 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:38:41,690 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:38:41,692 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:38:41,692 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:38:41,692 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:38:41,702 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:38:41,702 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:38:41,702 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 11:38:41,735 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-10-02 11:38:41,752 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-10-02 11:38:41,752 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:38:41,753 INFO L256 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 21 conjunts are in the unsatisfiable core [2019-10-02 11:38:41,755 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:38:41,862 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:38:41,900 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 18 proven. 12 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Exception during sending of exit command (exit): Broken pipe [2019-10-02 11:38:41,906 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:38:41,906 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2019-10-02 11:38:41,906 INFO L454 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-02 11:38:41,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-02 11:38:41,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2019-10-02 11:38:41,907 INFO L87 Difference]: Start difference. First operand 62 states and 67 transitions. Second operand 12 states. [2019-10-02 11:38:42,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:38:42,113 INFO L93 Difference]: Finished difference Result 76 states and 84 transitions. [2019-10-02 11:38:42,113 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-02 11:38:42,113 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 43 [2019-10-02 11:38:42,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:38:42,115 INFO L225 Difference]: With dead ends: 76 [2019-10-02 11:38:42,115 INFO L226 Difference]: Without dead ends: 71 [2019-10-02 11:38:42,116 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2019-10-02 11:38:42,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2019-10-02 11:38:42,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 70. [2019-10-02 11:38:42,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2019-10-02 11:38:42,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 78 transitions. [2019-10-02 11:38:42,139 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 78 transitions. Word has length 43 [2019-10-02 11:38:42,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:38:42,139 INFO L475 AbstractCegarLoop]: Abstraction has 70 states and 78 transitions. [2019-10-02 11:38:42,139 INFO L476 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-02 11:38:42,139 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 78 transitions. [2019-10-02 11:38:42,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2019-10-02 11:38:42,140 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:38:42,140 INFO L411 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:38:42,140 INFO L418 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:38:42,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:38:42,141 INFO L82 PathProgramCache]: Analyzing trace with hash -994740039, now seen corresponding path program 4 times [2019-10-02 11:38:42,141 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:38:42,141 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:38:42,148 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:38:42,148 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:38:42,148 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:38:42,156 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:38:42,157 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:38:42,157 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 11:38:42,180 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-10-02 11:43:39,823 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-02 11:43:39,824 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:43:39,825 INFO L256 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-02 11:43:39,826 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:43:39,855 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 29 proven. 13 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-02 11:43:39,859 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:43:39,859 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2019-10-02 11:43:39,860 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-02 11:43:39,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-02 11:43:39,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-02 11:43:39,860 INFO L87 Difference]: Start difference. First operand 70 states and 78 transitions. Second operand 5 states. [2019-10-02 11:43:39,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:43:39,956 INFO L93 Difference]: Finished difference Result 109 states and 129 transitions. [2019-10-02 11:43:39,956 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-02 11:43:39,956 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 43 [2019-10-02 11:43:39,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:43:39,957 INFO L225 Difference]: With dead ends: 109 [2019-10-02 11:43:39,957 INFO L226 Difference]: Without dead ends: 95 [2019-10-02 11:43:39,958 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-02 11:43:39,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2019-10-02 11:43:39,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 93. [2019-10-02 11:43:39,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2019-10-02 11:43:39,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 110 transitions. [2019-10-02 11:43:39,977 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 110 transitions. Word has length 43 [2019-10-02 11:43:39,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:43:39,978 INFO L475 AbstractCegarLoop]: Abstraction has 93 states and 110 transitions. [2019-10-02 11:43:39,978 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-02 11:43:39,978 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 110 transitions. [2019-10-02 11:43:39,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2019-10-02 11:43:39,979 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:43:39,979 INFO L411 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:43:39,979 INFO L418 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:43:39,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:43:39,979 INFO L82 PathProgramCache]: Analyzing trace with hash -511994883, now seen corresponding path program 5 times [2019-10-02 11:43:39,979 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:43:39,980 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:43:39,980 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:43:39,981 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:43:39,981 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:43:39,983 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:43:39,983 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:43:39,984 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-10-02 11:43:40,005 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 11:43:40,056 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-10-02 11:43:40,056 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:43:40,057 INFO L256 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 35 conjunts are in the unsatisfiable core [2019-10-02 11:43:40,058 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:43:40,399 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:43:40,453 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 12 proven. 32 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Exception during sending of exit command (exit): Broken pipe [2019-10-02 11:43:40,457 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:43:40,457 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2019-10-02 11:43:40,458 INFO L454 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-10-02 11:43:40,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-10-02 11:43:40,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2019-10-02 11:43:40,459 INFO L87 Difference]: Start difference. First operand 93 states and 110 transitions. Second operand 17 states. [2019-10-02 11:43:40,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:43:40,885 INFO L93 Difference]: Finished difference Result 105 states and 125 transitions. [2019-10-02 11:43:40,885 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-10-02 11:43:40,885 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 43 [2019-10-02 11:43:40,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:43:40,886 INFO L225 Difference]: With dead ends: 105 [2019-10-02 11:43:40,886 INFO L226 Difference]: Without dead ends: 100 [2019-10-02 11:43:40,887 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2019-10-02 11:43:40,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2019-10-02 11:43:40,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 98. [2019-10-02 11:43:40,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2019-10-02 11:43:40,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 117 transitions. [2019-10-02 11:43:40,908 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 117 transitions. Word has length 43 [2019-10-02 11:43:40,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:43:40,908 INFO L475 AbstractCegarLoop]: Abstraction has 98 states and 117 transitions. [2019-10-02 11:43:40,908 INFO L476 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-10-02 11:43:40,908 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 117 transitions. [2019-10-02 11:43:40,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2019-10-02 11:43:40,909 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:43:40,909 INFO L411 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:43:40,909 INFO L418 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:43:40,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:43:40,910 INFO L82 PathProgramCache]: Analyzing trace with hash 293665849, now seen corresponding path program 6 times [2019-10-02 11:43:40,910 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:43:40,910 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:43:40,911 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:43:40,911 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:43:40,911 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:43:40,914 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:43:40,914 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:43:40,914 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 11:43:40,945 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-10-02 11:45:04,026 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-10-02 11:45:04,027 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:45:04,028 INFO L256 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 34 conjunts are in the unsatisfiable core [2019-10-02 11:45:04,029 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:45:04,151 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:45:04,196 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 15 proven. 29 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-02 11:45:04,201 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:45:04,201 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2019-10-02 11:45:04,202 INFO L454 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-10-02 11:45:04,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-10-02 11:45:04,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2019-10-02 11:45:04,203 INFO L87 Difference]: Start difference. First operand 98 states and 117 transitions. Second operand 15 states. [2019-10-02 11:45:04,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:45:04,661 INFO L93 Difference]: Finished difference Result 117 states and 141 transitions. [2019-10-02 11:45:04,663 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-10-02 11:45:04,663 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 43 [2019-10-02 11:45:04,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:45:04,664 INFO L225 Difference]: With dead ends: 117 [2019-10-02 11:45:04,664 INFO L226 Difference]: Without dead ends: 112 [2019-10-02 11:45:04,665 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2019-10-02 11:45:04,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2019-10-02 11:45:04,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 100. [2019-10-02 11:45:04,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2019-10-02 11:45:04,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 120 transitions. [2019-10-02 11:45:04,690 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 120 transitions. Word has length 43 [2019-10-02 11:45:04,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:45:04,691 INFO L475 AbstractCegarLoop]: Abstraction has 100 states and 120 transitions. [2019-10-02 11:45:04,691 INFO L476 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-10-02 11:45:04,691 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 120 transitions. [2019-10-02 11:45:04,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2019-10-02 11:45:04,692 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:45:04,692 INFO L411 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:45:04,692 INFO L418 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:45:04,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:45:04,692 INFO L82 PathProgramCache]: Analyzing trace with hash 370099783, now seen corresponding path program 7 times [2019-10-02 11:45:04,693 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:45:04,693 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:45:04,695 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:45:04,695 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:45:04,695 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:45:04,702 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:45:04,702 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:45:04,703 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 11:45:04,753 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 11:45:04,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 11:45:04,773 INFO L256 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 12 conjunts are in the unsatisfiable core [2019-10-02 11:45:04,774 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:45:04,961 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 10 proven. 42 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2019-10-02 11:45:04,964 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:45:04,965 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2019-10-02 11:45:04,965 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-02 11:45:04,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-02 11:45:04,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2019-10-02 11:45:04,966 INFO L87 Difference]: Start difference. First operand 100 states and 120 transitions. Second operand 11 states. [2019-10-02 11:45:09,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:45:09,639 INFO L93 Difference]: Finished difference Result 119 states and 142 transitions. [2019-10-02 11:45:09,640 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-02 11:45:09,640 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 52 [2019-10-02 11:45:09,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:45:09,642 INFO L225 Difference]: With dead ends: 119 [2019-10-02 11:45:09,642 INFO L226 Difference]: Without dead ends: 114 [2019-10-02 11:45:09,642 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2019-10-02 11:45:09,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2019-10-02 11:45:09,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 111. [2019-10-02 11:45:09,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2019-10-02 11:45:09,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 134 transitions. [2019-10-02 11:45:09,666 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 134 transitions. Word has length 52 [2019-10-02 11:45:09,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:45:09,666 INFO L475 AbstractCegarLoop]: Abstraction has 111 states and 134 transitions. [2019-10-02 11:45:09,666 INFO L476 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-02 11:45:09,667 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 134 transitions. [2019-10-02 11:45:09,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2019-10-02 11:45:09,668 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:45:09,668 INFO L411 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:45:09,668 INFO L418 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:45:09,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:45:09,668 INFO L82 PathProgramCache]: Analyzing trace with hash -1703307389, now seen corresponding path program 8 times [2019-10-02 11:45:09,668 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:45:09,668 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:45:09,669 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:45:09,669 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 11:45:09,670 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:45:09,672 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:45:09,673 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:45:09,673 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 11:45:09,700 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-10-02 11:45:09,715 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-02 11:45:09,715 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:45:09,716 INFO L256 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-02 11:45:09,717 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:45:09,765 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 55 proven. 13 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-10-02 11:45:09,768 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:45:09,769 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2019-10-02 11:45:09,769 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-02 11:45:09,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-02 11:45:09,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-02 11:45:09,769 INFO L87 Difference]: Start difference. First operand 111 states and 134 transitions. Second operand 5 states. [2019-10-02 11:45:09,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:45:09,885 INFO L93 Difference]: Finished difference Result 125 states and 149 transitions. [2019-10-02 11:45:09,885 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-02 11:45:09,886 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 52 [2019-10-02 11:45:09,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:45:09,887 INFO L225 Difference]: With dead ends: 125 [2019-10-02 11:45:09,887 INFO L226 Difference]: Without dead ends: 106 [2019-10-02 11:45:09,887 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-02 11:45:09,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2019-10-02 11:45:09,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2019-10-02 11:45:09,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2019-10-02 11:45:09,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 126 transitions. [2019-10-02 11:45:09,907 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 126 transitions. Word has length 52 [2019-10-02 11:45:09,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:45:09,907 INFO L475 AbstractCegarLoop]: Abstraction has 106 states and 126 transitions. [2019-10-02 11:45:09,907 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-02 11:45:09,908 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 126 transitions. [2019-10-02 11:45:09,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2019-10-02 11:45:09,908 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:45:09,909 INFO L411 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:45:09,909 INFO L418 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:45:09,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:45:09,909 INFO L82 PathProgramCache]: Analyzing trace with hash -897646657, now seen corresponding path program 9 times [2019-10-02 11:45:09,909 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:45:09,909 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:45:09,910 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:45:09,910 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:45:09,911 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:45:09,913 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:45:09,913 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:45:09,914 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 11:45:09,938 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2