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/egcd.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fea9116 [2019-09-20 12:58:50,896 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-20 12:58:50,898 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-20 12:58:50,911 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-09-20 12:58:50,911 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-09-20 12:58:50,912 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-09-20 12:58:50,914 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-09-20 12:58:50,916 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-09-20 12:58:50,918 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-09-20 12:58:50,919 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-09-20 12:58:50,920 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-09-20 12:58:50,921 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-09-20 12:58:50,922 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-20 12:58:50,923 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-20 12:58:50,924 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-20 12:58:50,925 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-20 12:58:50,926 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-20 12:58:50,927 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-20 12:58:50,929 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-20 12:58:50,931 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-20 12:58:50,933 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-20 12:58:50,934 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-20 12:58:50,936 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-20 12:58:50,937 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-20 12:58:50,940 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-09-20 12:58:50,949 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-20 12:58:50,950 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-20 12:58:50,951 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-20 12:58:50,951 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 [2019-09-20 12:58:50,967 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-20 12:58:50,968 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-20 12:58:50,969 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-09-20 12:58:50,969 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-09-20 12:58:50,969 INFO L138 SettingsManager]: * Use SBE=true [2019-09-20 12:58:50,970 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-20 12:58:50,970 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-20 12:58:50,970 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-09-20 12:58:50,970 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-20 12:58:50,971 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-20 12:58:50,971 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-20 12:58:50,971 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-20 12:58:50,971 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-20 12:58:50,972 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-20 12:58:50,972 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-20 12:58:50,972 INFO L138 SettingsManager]: * Use constant arrays=true [2019-09-20 12:58:50,972 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-20 12:58:50,972 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-20 12:58:50,973 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-20 12:58:50,973 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-09-20 12:58:50,973 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-09-20 12:58:50,973 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-20 12:58:50,974 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-20 12:58:50,974 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-20 12:58:50,974 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-09-20 12:58:50,974 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-09-20 12:58:50,974 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-20 12:58:50,975 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-09-20 12:58:50,975 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-20 12:58:51,003 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-20 12:58:51,017 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-20 12:58:51,021 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-20 12:58:51,023 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-20 12:58:51,023 INFO L275 PluginConnector]: CDTParser initialized [2019-09-20 12:58:51,024 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/egcd.c [2019-09-20 12:58:51,103 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c66b18d09/0162441a50d34f7bbc99ee7d36e0e63c/FLAG5bb8d43e2 [2019-09-20 12:58:51,551 INFO L306 CDTParser]: Found 1 translation units. [2019-09-20 12:58:51,554 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/egcd.c [2019-09-20 12:58:51,562 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c66b18d09/0162441a50d34f7bbc99ee7d36e0e63c/FLAG5bb8d43e2 [2019-09-20 12:58:51,920 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c66b18d09/0162441a50d34f7bbc99ee7d36e0e63c [2019-09-20 12:58:51,932 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-20 12:58:51,934 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-20 12:58:51,935 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-20 12:58:51,935 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-20 12:58:51,938 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-20 12:58:51,940 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 12:58:51" (1/1) ... [2019-09-20 12:58:51,944 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@45983b19 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:58:51, skipping insertion in model container [2019-09-20 12:58:51,944 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 12:58:51" (1/1) ... [2019-09-20 12:58:51,952 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-20 12:58:51,975 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-20 12:58:52,203 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-20 12:58:52,213 INFO L188 MainTranslator]: Completed pre-run [2019-09-20 12:58:52,260 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-20 12:58:52,281 INFO L192 MainTranslator]: Completed translation [2019-09-20 12:58:52,283 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:58:52 WrapperNode [2019-09-20 12:58:52,283 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-20 12:58:52,284 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-20 12:58:52,284 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-20 12:58:52,284 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-20 12:58:52,400 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:58:52" (1/1) ... [2019-09-20 12:58:52,400 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:58:52" (1/1) ... [2019-09-20 12:58:52,407 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:58:52" (1/1) ... [2019-09-20 12:58:52,407 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:58:52" (1/1) ... [2019-09-20 12:58:52,417 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:58:52" (1/1) ... [2019-09-20 12:58:52,423 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:58:52" (1/1) ... [2019-09-20 12:58:52,425 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:58:52" (1/1) ... [2019-09-20 12:58:52,433 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-20 12:58:52,434 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-20 12:58:52,434 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-20 12:58:52,434 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-20 12:58:52,435 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:58:52" (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 [2019-09-20 12:58:52,511 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-20 12:58:52,512 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-20 12:58:52,512 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-09-20 12:58:52,512 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-20 12:58:52,512 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-20 12:58:52,513 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-20 12:58:52,513 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-09-20 12:58:52,513 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-09-20 12:58:52,514 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-20 12:58:52,514 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-20 12:58:52,514 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-20 12:58:52,716 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-20 12:58:52,717 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-20 12:58:52,718 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 12:58:52 BoogieIcfgContainer [2019-09-20 12:58:52,718 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-20 12:58:52,719 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-20 12:58:52,720 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-20 12:58:52,723 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-20 12:58:52,723 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.09 12:58:51" (1/3) ... [2019-09-20 12:58:52,724 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@441482 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 12:58:52, skipping insertion in model container [2019-09-20 12:58:52,724 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:58:52" (2/3) ... [2019-09-20 12:58:52,725 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@441482 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 12:58:52, skipping insertion in model container [2019-09-20 12:58:52,725 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 12:58:52" (3/3) ... [2019-09-20 12:58:52,730 INFO L109 eAbstractionObserver]: Analyzing ICFG egcd.c [2019-09-20 12:58:52,750 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-20 12:58:52,759 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-20 12:58:52,780 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-20 12:58:52,834 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2019-09-20 12:58:52,838 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-20 12:58:52,839 INFO L378 AbstractCegarLoop]: Hoare is true [2019-09-20 12:58:52,839 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-20 12:58:52,839 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-20 12:58:52,839 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-20 12:58:52,840 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-20 12:58:52,840 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-20 12:58:52,840 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-20 12:58:52,879 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states. [2019-09-20 12:58:52,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-09-20 12:58:52,886 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 12:58:52,888 INFO L407 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 12:58:52,890 INFO L418 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 12:58:52,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 12:58:52,898 INFO L82 PathProgramCache]: Analyzing trace with hash -1589353370, now seen corresponding path program 1 times [2019-09-20 12:58:52,900 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 12:58:52,910 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 12:58:52,952 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:58:52,953 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 12:58:52,953 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:58:52,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 12:58:53,027 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-20 12:58:53,029 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-20 12:58:53,029 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-09-20 12:58:53,033 INFO L454 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-09-20 12:58:53,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-09-20 12:58:53,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-20 12:58:53,045 INFO L87 Difference]: Start difference. First operand 26 states. Second operand 2 states. [2019-09-20 12:58:53,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 12:58:53,070 INFO L93 Difference]: Finished difference Result 47 states and 74 transitions. [2019-09-20 12:58:53,070 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-09-20 12:58:53,071 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2019-09-20 12:58:53,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 12:58:53,079 INFO L225 Difference]: With dead ends: 47 [2019-09-20 12:58:53,080 INFO L226 Difference]: Without dead ends: 21 [2019-09-20 12:58:53,083 INFO L636 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 [2019-09-20 12:58:53,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-09-20 12:58:53,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2019-09-20 12:58:53,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-09-20 12:58:53,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 28 transitions. [2019-09-20 12:58:53,140 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 28 transitions. Word has length 10 [2019-09-20 12:58:53,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 12:58:53,140 INFO L475 AbstractCegarLoop]: Abstraction has 21 states and 28 transitions. [2019-09-20 12:58:53,141 INFO L476 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-09-20 12:58:53,141 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 28 transitions. [2019-09-20 12:58:53,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-09-20 12:58:53,142 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 12:58:53,142 INFO L407 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 12:58:53,142 INFO L418 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 12:58:53,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 12:58:53,143 INFO L82 PathProgramCache]: Analyzing trace with hash -1587685074, now seen corresponding path program 1 times [2019-09-20 12:58:53,143 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 12:58:53,143 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 12:58:53,145 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:58:53,145 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 12:58:53,146 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:58:53,155 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-20 12:58:53,155 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-20 12:58:53,156 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) [2019-09-20 12:58:53,178 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-20 12:58:53,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 12:58:53,213 INFO L256 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 13 conjunts are in the unsatisfiable core [2019-09-20 12:58:53,221 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-20 12:58:53,287 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-20 12:58:53,292 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-20 12:58:53,292 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-09-20 12:58:53,294 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-20 12:58:53,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-20 12:58:53,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-09-20 12:58:53,295 INFO L87 Difference]: Start difference. First operand 21 states and 28 transitions. Second operand 5 states. [2019-09-20 12:58:53,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 12:58:53,426 INFO L93 Difference]: Finished difference Result 37 states and 51 transitions. [2019-09-20 12:58:53,426 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-09-20 12:58:53,427 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2019-09-20 12:58:53,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 12:58:53,428 INFO L225 Difference]: With dead ends: 37 [2019-09-20 12:58:53,428 INFO L226 Difference]: Without dead ends: 35 [2019-09-20 12:58:53,430 INFO L636 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 [2019-09-20 12:58:53,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-09-20 12:58:53,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2019-09-20 12:58:53,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-09-20 12:58:53,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 48 transitions. [2019-09-20 12:58:53,451 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 48 transitions. Word has length 10 [2019-09-20 12:58:53,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 12:58:53,451 INFO L475 AbstractCegarLoop]: Abstraction has 34 states and 48 transitions. [2019-09-20 12:58:53,453 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-20 12:58:53,453 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 48 transitions. [2019-09-20 12:58:53,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-09-20 12:58:53,454 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 12:58:53,454 INFO L407 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 12:58:53,455 INFO L418 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 12:58:53,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 12:58:53,456 INFO L82 PathProgramCache]: Analyzing trace with hash 1592529048, now seen corresponding path program 1 times [2019-09-20 12:58:53,456 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 12:58:53,457 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 12:58:53,459 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:58:53,459 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 12:58:53,460 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:58:53,478 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-20 12:58:53,478 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-20 12:58:53,478 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 [2019-09-20 12:58:53,494 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 12:58:53,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 12:58:53,509 INFO L256 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 13 conjunts are in the unsatisfiable core [2019-09-20 12:58:53,511 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-20 12:58:53,569 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-20 12:58:53,575 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-20 12:58:53,575 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-09-20 12:58:53,576 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-20 12:58:53,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-20 12:58:53,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-09-20 12:58:53,576 INFO L87 Difference]: Start difference. First operand 34 states and 48 transitions. Second operand 5 states. [2019-09-20 12:58:53,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 12:58:53,673 INFO L93 Difference]: Finished difference Result 41 states and 54 transitions. [2019-09-20 12:58:53,673 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-09-20 12:58:53,674 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2019-09-20 12:58:53,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 12:58:53,675 INFO L225 Difference]: With dead ends: 41 [2019-09-20 12:58:53,675 INFO L226 Difference]: Without dead ends: 39 [2019-09-20 12:58:53,676 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-09-20 12:58:53,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-09-20 12:58:53,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2019-09-20 12:58:53,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-09-20 12:58:53,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 51 transitions. [2019-09-20 12:58:53,688 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 51 transitions. Word has length 15 [2019-09-20 12:58:53,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 12:58:53,688 INFO L475 AbstractCegarLoop]: Abstraction has 38 states and 51 transitions. [2019-09-20 12:58:53,688 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-20 12:58:53,688 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 51 transitions. [2019-09-20 12:58:53,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-09-20 12:58:53,689 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 12:58:53,689 INFO L407 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 12:58:53,690 INFO L418 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 12:58:53,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 12:58:53,690 INFO L82 PathProgramCache]: Analyzing trace with hash 2040988462, now seen corresponding path program 1 times [2019-09-20 12:58:53,691 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 12:58:53,691 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 12:58:53,692 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:58:53,692 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 12:58:53,692 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:58:53,699 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-20 12:58:53,699 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-20 12:58:53,699 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-20 12:58:53,721 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 12:58:53,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 12:58:53,737 INFO L256 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 13 conjunts are in the unsatisfiable core [2019-09-20 12:58:53,739 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-20 12:58:53,783 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-09-20 12:58:53,787 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-20 12:58:53,787 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-09-20 12:58:53,788 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-20 12:58:53,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-20 12:58:53,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-09-20 12:58:53,789 INFO L87 Difference]: Start difference. First operand 38 states and 51 transitions. Second operand 5 states. [2019-09-20 12:58:53,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 12:58:53,881 INFO L93 Difference]: Finished difference Result 63 states and 91 transitions. [2019-09-20 12:58:53,882 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-09-20 12:58:53,882 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2019-09-20 12:58:53,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 12:58:53,886 INFO L225 Difference]: With dead ends: 63 [2019-09-20 12:58:53,887 INFO L226 Difference]: Without dead ends: 59 [2019-09-20 12:58:53,888 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-09-20 12:58:53,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2019-09-20 12:58:53,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2019-09-20 12:58:53,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2019-09-20 12:58:53,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 84 transitions. [2019-09-20 12:58:53,907 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 84 transitions. Word has length 20 [2019-09-20 12:58:53,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 12:58:53,908 INFO L475 AbstractCegarLoop]: Abstraction has 59 states and 84 transitions. [2019-09-20 12:58:53,908 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-20 12:58:53,908 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 84 transitions. [2019-09-20 12:58:53,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-09-20 12:58:53,909 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 12:58:53,910 INFO L407 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 12:58:53,910 INFO L418 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 12:58:53,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 12:58:53,910 INFO L82 PathProgramCache]: Analyzing trace with hash 113727669, now seen corresponding path program 1 times [2019-09-20 12:58:53,911 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 12:58:53,911 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 12:58:53,912 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:58:53,912 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 12:58:53,913 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:58:53,920 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-20 12:58:53,920 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-20 12:58:53,920 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 [2019-09-20 12:58:53,938 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 12:58:53,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 12:58:53,967 INFO L256 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2019-09-20 12:58:53,969 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-20 12:58:53,992 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-09-20 12:58:53,996 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-20 12:58:53,996 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-09-20 12:58:53,997 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-20 12:58:53,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-20 12:58:53,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-09-20 12:58:53,998 INFO L87 Difference]: Start difference. First operand 59 states and 84 transitions. Second operand 5 states. [2019-09-20 12:58:54,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 12:58:54,060 INFO L93 Difference]: Finished difference Result 65 states and 89 transitions. [2019-09-20 12:58:54,061 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-09-20 12:58:54,061 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 26 [2019-09-20 12:58:54,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 12:58:54,062 INFO L225 Difference]: With dead ends: 65 [2019-09-20 12:58:54,063 INFO L226 Difference]: Without dead ends: 63 [2019-09-20 12:58:54,063 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-09-20 12:58:54,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2019-09-20 12:58:54,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2019-09-20 12:58:54,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2019-09-20 12:58:54,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 87 transitions. [2019-09-20 12:58:54,078 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 87 transitions. Word has length 26 [2019-09-20 12:58:54,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 12:58:54,081 INFO L475 AbstractCegarLoop]: Abstraction has 63 states and 87 transitions. [2019-09-20 12:58:54,081 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-20 12:58:54,082 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 87 transitions. [2019-09-20 12:58:54,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-09-20 12:58:54,083 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 12:58:54,083 INFO L407 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 12:58:54,083 INFO L418 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 12:58:54,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 12:58:54,083 INFO L82 PathProgramCache]: Analyzing trace with hash -1597054094, now seen corresponding path program 1 times [2019-09-20 12:58:54,084 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 12:58:54,084 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 12:58:54,086 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:58:54,086 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 12:58:54,086 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:58:54,098 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-20 12:58:54,102 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-20 12:58:54,103 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-20 12:58:54,138 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 12:58:54,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 12:58:54,160 INFO L256 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 15 conjunts are in the unsatisfiable core [2019-09-20 12:58:54,163 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-20 12:58:54,197 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-09-20 12:58:54,201 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-20 12:58:54,201 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-09-20 12:58:54,202 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-20 12:58:54,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-20 12:58:54,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-09-20 12:58:54,203 INFO L87 Difference]: Start difference. First operand 63 states and 87 transitions. Second operand 5 states. [2019-09-20 12:58:54,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 12:58:54,268 INFO L93 Difference]: Finished difference Result 73 states and 95 transitions. [2019-09-20 12:58:54,268 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-09-20 12:58:54,268 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 28 [2019-09-20 12:58:54,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 12:58:54,270 INFO L225 Difference]: With dead ends: 73 [2019-09-20 12:58:54,270 INFO L226 Difference]: Without dead ends: 70 [2019-09-20 12:58:54,271 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-09-20 12:58:54,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2019-09-20 12:58:54,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 68. [2019-09-20 12:58:54,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2019-09-20 12:58:54,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 88 transitions. [2019-09-20 12:58:54,283 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 88 transitions. Word has length 28 [2019-09-20 12:58:54,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 12:58:54,283 INFO L475 AbstractCegarLoop]: Abstraction has 68 states and 88 transitions. [2019-09-20 12:58:54,283 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-20 12:58:54,283 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 88 transitions. [2019-09-20 12:58:54,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-09-20 12:58:54,285 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 12:58:54,285 INFO L407 BasicCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 12:58:54,285 INFO L418 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 12:58:54,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 12:58:54,286 INFO L82 PathProgramCache]: Analyzing trace with hash -1857063759, now seen corresponding path program 1 times [2019-09-20 12:58:54,286 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 12:58:54,286 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 12:58:54,287 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:58:54,287 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 12:58:54,287 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:58:54,299 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-20 12:58:54,299 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-20 12:58:54,301 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) [2019-09-20 12:58:54,336 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 12:58:54,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-20 12:58:54,357 INFO L256 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 15 conjunts are in the unsatisfiable core [2019-09-20 12:58:54,361 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-20 12:58:54,418 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-09-20 12:58:54,422 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-20 12:58:54,422 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-20 12:58:54,423 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-20 12:58:54,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-20 12:58:54,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-09-20 12:58:54,423 INFO L87 Difference]: Start difference. First operand 68 states and 88 transitions. Second operand 6 states. [2019-09-20 12:58:54,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 12:58:54,538 INFO L93 Difference]: Finished difference Result 81 states and 100 transitions. [2019-09-20 12:58:54,539 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-09-20 12:58:54,539 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 31 [2019-09-20 12:58:54,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 12:58:54,541 INFO L225 Difference]: With dead ends: 81 [2019-09-20 12:58:54,541 INFO L226 Difference]: Without dead ends: 77 [2019-09-20 12:58:54,542 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-09-20 12:58:54,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2019-09-20 12:58:54,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 76. [2019-09-20 12:58:54,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2019-09-20 12:58:54,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 93 transitions. [2019-09-20 12:58:54,554 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 93 transitions. Word has length 31 [2019-09-20 12:58:54,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 12:58:54,554 INFO L475 AbstractCegarLoop]: Abstraction has 76 states and 93 transitions. [2019-09-20 12:58:54,554 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-20 12:58:54,555 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 93 transitions. [2019-09-20 12:58:54,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-09-20 12:58:54,556 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 12:58:54,556 INFO L407 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 12:58:54,556 INFO L418 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 12:58:54,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 12:58:54,557 INFO L82 PathProgramCache]: Analyzing trace with hash -493170476, now seen corresponding path program 2 times [2019-09-20 12:58:54,557 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 12:58:54,557 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 12:58:54,559 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:58:54,559 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 12:58:54,559 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:58:54,565 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-20 12:58:54,566 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-20 12:58:54,566 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) [2019-09-20 12:58:54,585 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-20 12:58:54,607 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-20 12:58:54,607 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-20 12:58:54,609 INFO L256 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 25 conjunts are in the unsatisfiable core [2019-09-20 12:58:54,619 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-20 12:58:54,702 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Exception during sending of exit command (exit): Broken pipe [2019-09-20 12:58:54,706 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-20 12:58:54,706 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2019-09-20 12:58:54,707 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-20 12:58:54,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-20 12:58:54,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-09-20 12:58:54,708 INFO L87 Difference]: Start difference. First operand 76 states and 93 transitions. Second operand 6 states. [2019-09-20 12:58:54,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 12:58:54,846 INFO L93 Difference]: Finished difference Result 108 states and 136 transitions. [2019-09-20 12:58:54,847 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-09-20 12:58:54,847 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 33 [2019-09-20 12:58:54,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 12:58:54,850 INFO L225 Difference]: With dead ends: 108 [2019-09-20 12:58:54,851 INFO L226 Difference]: Without dead ends: 106 [2019-09-20 12:58:54,852 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-09-20 12:58:54,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2019-09-20 12:58:54,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 100. [2019-09-20 12:58:54,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2019-09-20 12:58:54,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 124 transitions. [2019-09-20 12:58:54,888 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 124 transitions. Word has length 33 [2019-09-20 12:58:54,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 12:58:54,889 INFO L475 AbstractCegarLoop]: Abstraction has 100 states and 124 transitions. [2019-09-20 12:58:54,889 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-20 12:58:54,889 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 124 transitions. [2019-09-20 12:58:54,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-09-20 12:58:54,893 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 12:58:54,893 INFO L407 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 12:58:54,895 INFO L418 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 12:58:54,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 12:58:54,895 INFO L82 PathProgramCache]: Analyzing trace with hash -558447568, now seen corresponding path program 1 times [2019-09-20 12:58:54,897 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 12:58:54,897 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 12:58:54,898 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:58:54,898 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-20 12:58:54,899 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:58:54,914 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-20 12:58:54,914 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-20 12:58:54,914 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-20 12:58:54,932 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-20 12:58:54,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 12:58:54,960 INFO L256 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 25 conjunts are in the unsatisfiable core [2019-09-20 12:58:54,973 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-20 12:58:55,063 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2019-09-20 12:58:55,071 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-20 12:58:55,071 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2019-09-20 12:58:55,071 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-20 12:58:55,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-20 12:58:55,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-09-20 12:58:55,073 INFO L87 Difference]: Start difference. First operand 100 states and 124 transitions. Second operand 6 states. [2019-09-20 12:58:55,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 12:58:55,229 INFO L93 Difference]: Finished difference Result 125 states and 164 transitions. [2019-09-20 12:58:55,230 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-09-20 12:58:55,230 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 38 [2019-09-20 12:58:55,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 12:58:55,232 INFO L225 Difference]: With dead ends: 125 [2019-09-20 12:58:55,232 INFO L226 Difference]: Without dead ends: 119 [2019-09-20 12:58:55,233 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-09-20 12:58:55,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2019-09-20 12:58:55,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2019-09-20 12:58:55,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2019-09-20 12:58:55,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 153 transitions. [2019-09-20 12:58:55,253 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 153 transitions. Word has length 38 [2019-09-20 12:58:55,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 12:58:55,254 INFO L475 AbstractCegarLoop]: Abstraction has 119 states and 153 transitions. [2019-09-20 12:58:55,254 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-20 12:58:55,254 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 153 transitions. [2019-09-20 12:58:55,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2019-09-20 12:58:55,256 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 12:58:55,256 INFO L407 BasicCegarLoop]: trace histogram [7, 6, 6, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 12:58:55,256 INFO L418 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 12:58:55,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 12:58:55,257 INFO L82 PathProgramCache]: Analyzing trace with hash 1383929332, now seen corresponding path program 1 times [2019-09-20 12:58:55,257 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 12:58:55,257 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 12:58:55,258 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:58:55,258 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 12:58:55,258 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:58:55,265 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-20 12:58:55,265 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-20 12:58:55,265 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) [2019-09-20 12:58:55,284 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-20 12:58:55,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 12:58:55,306 INFO L256 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 23 conjunts are in the unsatisfiable core [2019-09-20 12:58:55,313 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-20 12:58:55,401 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Exception during sending of exit command (exit): Broken pipe [2019-09-20 12:58:55,406 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-20 12:58:55,406 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2019-09-20 12:58:55,406 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-09-20 12:58:55,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-09-20 12:58:55,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-09-20 12:58:55,407 INFO L87 Difference]: Start difference. First operand 119 states and 153 transitions. Second operand 7 states. [2019-09-20 12:58:55,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 12:58:55,571 INFO L93 Difference]: Finished difference Result 141 states and 182 transitions. [2019-09-20 12:58:55,572 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-20 12:58:55,572 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 46 [2019-09-20 12:58:55,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 12:58:55,574 INFO L225 Difference]: With dead ends: 141 [2019-09-20 12:58:55,574 INFO L226 Difference]: Without dead ends: 139 [2019-09-20 12:58:55,575 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-09-20 12:58:55,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2019-09-20 12:58:55,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 135. [2019-09-20 12:58:55,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2019-09-20 12:58:55,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 174 transitions. [2019-09-20 12:58:55,593 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 174 transitions. Word has length 46 [2019-09-20 12:58:55,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 12:58:55,593 INFO L475 AbstractCegarLoop]: Abstraction has 135 states and 174 transitions. [2019-09-20 12:58:55,593 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-09-20 12:58:55,594 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 174 transitions. [2019-09-20 12:58:55,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2019-09-20 12:58:55,595 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 12:58:55,595 INFO L407 BasicCegarLoop]: trace histogram [7, 6, 6, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 12:58:55,595 INFO L418 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 12:58:55,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 12:58:55,596 INFO L82 PathProgramCache]: Analyzing trace with hash 1192657524, now seen corresponding path program 2 times [2019-09-20 12:58:55,596 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 12:58:55,596 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 12:58:55,597 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:58:55,597 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 12:58:55,598 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:58:55,602 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-20 12:58:55,602 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-20 12:58:55,603 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 [2019-09-20 12:58:55,630 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-20 12:58:55,652 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-20 12:58:55,652 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-20 12:58:55,653 INFO L256 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 23 conjunts are in the unsatisfiable core [2019-09-20 12:58:55,655 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-20 12:58:55,738 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Exception during sending of exit command (exit): Broken pipe [2019-09-20 12:58:55,743 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-20 12:58:55,743 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2019-09-20 12:58:55,744 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-09-20 12:58:55,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-09-20 12:58:55,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-09-20 12:58:55,745 INFO L87 Difference]: Start difference. First operand 135 states and 174 transitions. Second operand 7 states. [2019-09-20 12:58:55,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 12:58:55,898 INFO L93 Difference]: Finished difference Result 154 states and 198 transitions. [2019-09-20 12:58:55,899 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-20 12:58:55,899 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 46 [2019-09-20 12:58:55,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 12:58:55,901 INFO L225 Difference]: With dead ends: 154 [2019-09-20 12:58:55,901 INFO L226 Difference]: Without dead ends: 151 [2019-09-20 12:58:55,902 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-09-20 12:58:55,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2019-09-20 12:58:55,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 148. [2019-09-20 12:58:55,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2019-09-20 12:58:55,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 189 transitions. [2019-09-20 12:58:55,919 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 189 transitions. Word has length 46 [2019-09-20 12:58:55,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 12:58:55,920 INFO L475 AbstractCegarLoop]: Abstraction has 148 states and 189 transitions. [2019-09-20 12:58:55,920 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-09-20 12:58:55,920 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 189 transitions. [2019-09-20 12:58:55,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2019-09-20 12:58:55,921 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 12:58:55,922 INFO L407 BasicCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 12:58:55,922 INFO L418 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 12:58:55,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 12:58:55,922 INFO L82 PathProgramCache]: Analyzing trace with hash 1196309741, now seen corresponding path program 1 times [2019-09-20 12:58:55,922 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 12:58:55,922 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 12:58:55,924 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:58:55,924 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-20 12:58:55,924 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:58:55,928 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-20 12:58:55,928 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-20 12:58:55,928 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) [2019-09-20 12:58:55,951 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-20 12:58:55,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 12:58:55,969 INFO L256 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 14 conjunts are in the unsatisfiable core [2019-09-20 12:58:55,971 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-20 12:58:56,020 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-20 12:58:56,051 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 27 proven. 7 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2019-09-20 12:58:56,055 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-20 12:58:56,055 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2019-09-20 12:58:56,055 INFO L454 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-09-20 12:58:56,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-09-20 12:58:56,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2019-09-20 12:58:56,056 INFO L87 Difference]: Start difference. First operand 148 states and 189 transitions. Second operand 9 states. [2019-09-20 12:58:56,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 12:58:56,217 INFO L93 Difference]: Finished difference Result 161 states and 202 transitions. [2019-09-20 12:58:56,220 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-09-20 12:58:56,220 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 49 [2019-09-20 12:58:56,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 12:58:56,222 INFO L225 Difference]: With dead ends: 161 [2019-09-20 12:58:56,224 INFO L226 Difference]: Without dead ends: 157 [2019-09-20 12:58:56,227 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2019-09-20 12:58:56,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2019-09-20 12:58:56,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2019-09-20 12:58:56,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2019-09-20 12:58:56,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 194 transitions. [2019-09-20 12:58:56,247 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 194 transitions. Word has length 49 [2019-09-20 12:58:56,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 12:58:56,248 INFO L475 AbstractCegarLoop]: Abstraction has 157 states and 194 transitions. [2019-09-20 12:58:56,248 INFO L476 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-09-20 12:58:56,248 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 194 transitions. [2019-09-20 12:58:56,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-09-20 12:58:56,250 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 12:58:56,250 INFO L407 BasicCegarLoop]: trace histogram [8, 7, 7, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 12:58:56,250 INFO L418 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 12:58:56,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 12:58:56,251 INFO L82 PathProgramCache]: Analyzing trace with hash 336099856, now seen corresponding path program 3 times [2019-09-20 12:58:56,251 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 12:58:56,251 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 12:58:56,253 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:58:56,253 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 12:58:56,253 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:58:56,266 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-20 12:58:56,266 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-20 12:58:56,266 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 [2019-09-20 12:58:56,293 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-20 12:58:56,311 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-09-20 12:58:56,311 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-20 12:58:56,312 INFO L256 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 31 conjunts are in the unsatisfiable core [2019-09-20 12:58:56,314 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-20 12:58:56,410 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 14 proven. 12 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2019-09-20 12:58:56,417 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-20 12:58:56,417 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2019-09-20 12:58:56,418 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-09-20 12:58:56,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-09-20 12:58:56,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-09-20 12:58:56,420 INFO L87 Difference]: Start difference. First operand 157 states and 194 transitions. Second operand 7 states. [2019-09-20 12:58:56,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 12:58:56,629 INFO L93 Difference]: Finished difference Result 187 states and 233 transitions. [2019-09-20 12:58:56,629 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-20 12:58:56,629 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 51 [2019-09-20 12:58:56,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 12:58:56,631 INFO L225 Difference]: With dead ends: 187 [2019-09-20 12:58:56,632 INFO L226 Difference]: Without dead ends: 185 [2019-09-20 12:58:56,632 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-09-20 12:58:56,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2019-09-20 12:58:56,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 181. [2019-09-20 12:58:56,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2019-09-20 12:58:56,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 224 transitions. [2019-09-20 12:58:56,653 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 224 transitions. Word has length 51 [2019-09-20 12:58:56,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 12:58:56,654 INFO L475 AbstractCegarLoop]: Abstraction has 181 states and 224 transitions. [2019-09-20 12:58:56,654 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-09-20 12:58:56,654 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 224 transitions. [2019-09-20 12:58:56,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-09-20 12:58:56,655 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 12:58:56,656 INFO L407 BasicCegarLoop]: trace histogram [8, 7, 7, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 12:58:56,656 INFO L418 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 12:58:56,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 12:58:56,656 INFO L82 PathProgramCache]: Analyzing trace with hash 1722303250, now seen corresponding path program 3 times [2019-09-20 12:58:56,657 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 12:58:56,657 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 12:58:56,658 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:58:56,658 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-20 12:58:56,659 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:58:56,663 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-20 12:58:56,664 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-20 12:58:56,664 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 [2019-09-20 12:58:56,689 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-20 12:58:56,712 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-09-20 12:58:56,712 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-20 12:58:56,714 INFO L256 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 31 conjunts are in the unsatisfiable core [2019-09-20 12:58:56,716 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-20 12:58:56,821 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 14 proven. 12 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2019-09-20 12:58:56,833 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-20 12:58:56,833 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2019-09-20 12:58:56,834 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-09-20 12:58:56,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-09-20 12:58:56,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-09-20 12:58:56,835 INFO L87 Difference]: Start difference. First operand 181 states and 224 transitions. Second operand 7 states. [2019-09-20 12:58:57,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 12:58:57,044 INFO L93 Difference]: Finished difference Result 210 states and 258 transitions. [2019-09-20 12:58:57,045 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-20 12:58:57,045 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 51 [2019-09-20 12:58:57,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 12:58:57,047 INFO L225 Difference]: With dead ends: 210 [2019-09-20 12:58:57,047 INFO L226 Difference]: Without dead ends: 208 [2019-09-20 12:58:57,050 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-09-20 12:58:57,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2019-09-20 12:58:57,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 194. [2019-09-20 12:58:57,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2019-09-20 12:58:57,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 235 transitions. [2019-09-20 12:58:57,083 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 235 transitions. Word has length 51 [2019-09-20 12:58:57,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 12:58:57,085 INFO L475 AbstractCegarLoop]: Abstraction has 194 states and 235 transitions. [2019-09-20 12:58:57,085 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-09-20 12:58:57,085 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 235 transitions. [2019-09-20 12:58:57,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2019-09-20 12:58:57,086 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 12:58:57,086 INFO L407 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 12:58:57,086 INFO L418 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 12:58:57,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 12:58:57,087 INFO L82 PathProgramCache]: Analyzing trace with hash 1389199476, now seen corresponding path program 4 times [2019-09-20 12:58:57,087 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 12:58:57,087 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 12:58:57,090 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:58:57,090 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-20 12:58:57,090 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:58:57,103 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-20 12:58:57,104 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-20 12:58:57,104 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 [2019-09-20 12:58:57,144 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-20 12:58:57,166 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-20 12:58:57,167 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-20 12:58:57,168 INFO L256 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 33 conjunts are in the unsatisfiable core [2019-09-20 12:58:57,175 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-20 12:58:59,433 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-20 12:58:59,474 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 27 proven. 48 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2019-09-20 12:58:59,478 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-20 12:58:59,478 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2019-09-20 12:58:59,478 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-09-20 12:58:59,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-09-20 12:58:59,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=84, Unknown=1, NotChecked=0, Total=110 [2019-09-20 12:58:59,479 INFO L87 Difference]: Start difference. First operand 194 states and 235 transitions. Second operand 11 states. [2019-09-20 12:59:01,546 WARN L191 SmtUtils]: Spent 2.05 s on a formula simplification. DAG size of input: 47 DAG size of output: 46 [2019-09-20 12:59:01,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 12:59:01,851 INFO L93 Difference]: Finished difference Result 198 states and 238 transitions. [2019-09-20 12:59:01,852 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-20 12:59:01,852 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 56 [2019-09-20 12:59:01,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 12:59:01,852 INFO L225 Difference]: With dead ends: 198 [2019-09-20 12:59:01,852 INFO L226 Difference]: Without dead ends: 0 [2019-09-20 12:59:01,858 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=43, Invalid=138, Unknown=1, NotChecked=0, Total=182 [2019-09-20 12:59:01,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-09-20 12:59:01,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-09-20 12:59:01,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-09-20 12:59:01,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-09-20 12:59:01,859 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 56 [2019-09-20 12:59:01,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 12:59:01,859 INFO L475 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-09-20 12:59:01,859 INFO L476 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-09-20 12:59:01,860 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-09-20 12:59:01,860 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-09-20 12:59:01,864 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-09-20 12:59:18,657 WARN L191 SmtUtils]: Spent 16.53 s on a formula simplification. DAG size of input: 80 DAG size of output: 48 [2019-09-20 12:59:32,415 WARN L191 SmtUtils]: Spent 13.76 s on a formula simplification. DAG size of input: 80 DAG size of output: 48