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 --traceabstraction.trace.refinement.strategy SIFA_TAIPAN --sifa.abstract.domain CompoundDomain --rcfgbuilder.size.of.a.code.block LoopFreeBlock --sifa.call.summarizer TopInputCallSummarizer --sifa.fluid SizeLimitFluid --sifa.simplification.technique SIMPLIFY_QUICK -i ../../../trunk/examples/svcomp/array-examples/standard_copy8_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 01:32:52,815 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 01:32:52,818 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 01:32:52,830 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-10-15 01:32:52,840 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 01:32:52,841 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 01:32:52,842 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 01:32:52,843 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 01:32:52,844 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 01:32:52,845 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 01:32:52,847 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 01:32:52,850 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 01:32:52,851 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 01:32:52,853 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 01:32:52,854 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 01:32:52,855 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 01:32:52,857 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 01:32:52,864 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 01:32:52,865 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 01:32:52,866 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 01:32:52,867 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-15 01:32:52,889 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 01:32:52,889 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 01:32:52,892 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 01:32:52,892 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 01:32:52,892 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 01:32:52,892 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 01:32:52,893 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 01:32:52,893 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 01:32:52,893 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 01:32:52,893 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 01:32:52,894 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 01:32:52,894 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 01:32:52,895 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 01:32:52,895 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 01:32:52,895 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 01:32:52,895 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 01:32:52,896 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 01:32:52,896 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 01:32:52,896 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 01:32:52,896 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 01:32:52,897 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 01:32:52,897 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:32:52,897 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 01:32:52,898 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 01:32:52,898 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 01:32:52,898 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 01:32:52,898 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 01:32:52,898 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 01:32:52,899 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> SIFA_TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> CompoundDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> LoopFreeBlock Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Call Summarizer -> TopInputCallSummarizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Fluid -> SizeLimitFluid Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Simplification Technique -> SIMPLIFY_QUICK [2019-10-15 01:32:53,216 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 01:32:53,236 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 01:32:53,240 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 01:32:53,241 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 01:32:53,242 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 01:32:53,243 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_copy8_ground-1.i [2019-10-15 01:32:53,305 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a406ad954/e3d1b47b4e8e4c1792bba1653238e2c5/FLAG7ea5c30c8 [2019-10-15 01:32:53,766 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 01:32:53,767 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_copy8_ground-1.i [2019-10-15 01:32:53,773 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a406ad954/e3d1b47b4e8e4c1792bba1653238e2c5/FLAG7ea5c30c8 [2019-10-15 01:32:54,125 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a406ad954/e3d1b47b4e8e4c1792bba1653238e2c5 [2019-10-15 01:32:54,137 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 01:32:54,139 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 01:32:54,143 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 01:32:54,143 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 01:32:54,146 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 01:32:54,147 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:32:54" (1/1) ... [2019-10-15 01:32:54,150 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6b0f51fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:32:54, skipping insertion in model container [2019-10-15 01:32:54,150 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:32:54" (1/1) ... [2019-10-15 01:32:54,158 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 01:32:54,176 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 01:32:54,400 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:32:54,410 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 01:32:54,470 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:32:54,585 INFO L192 MainTranslator]: Completed translation [2019-10-15 01:32:54,586 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:32:54 WrapperNode [2019-10-15 01:32:54,586 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 01:32:54,587 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 01:32:54,587 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 01:32:54,587 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 01:32:54,599 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:32:54" (1/1) ... [2019-10-15 01:32:54,599 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:32:54" (1/1) ... [2019-10-15 01:32:54,609 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:32:54" (1/1) ... [2019-10-15 01:32:54,610 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:32:54" (1/1) ... [2019-10-15 01:32:54,621 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:32:54" (1/1) ... [2019-10-15 01:32:54,633 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:32:54" (1/1) ... [2019-10-15 01:32:54,638 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:32:54" (1/1) ... [2019-10-15 01:32:54,644 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 01:32:54,645 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 01:32:54,645 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 01:32:54,645 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 01:32:54,649 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:32:54" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:32:54,706 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 01:32:54,706 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 01:32:54,706 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-15 01:32:54,707 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 01:32:54,707 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 01:32:54,707 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-15 01:32:54,707 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 01:32:54,707 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 01:32:54,707 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-15 01:32:54,708 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-15 01:32:54,708 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-15 01:32:54,708 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-15 01:32:54,708 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 01:32:54,708 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 01:32:55,302 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 01:32:55,302 INFO L284 CfgBuilder]: Removed 10 assume(true) statements. [2019-10-15 01:32:55,303 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:32:55 BoogieIcfgContainer [2019-10-15 01:32:55,304 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 01:32:55,305 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 01:32:55,305 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 01:32:55,308 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 01:32:55,309 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 01:32:54" (1/3) ... [2019-10-15 01:32:55,310 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ec2e722 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:32:55, skipping insertion in model container [2019-10-15 01:32:55,310 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:32:54" (2/3) ... [2019-10-15 01:32:55,310 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ec2e722 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:32:55, skipping insertion in model container [2019-10-15 01:32:55,311 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:32:55" (3/3) ... [2019-10-15 01:32:55,312 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_copy8_ground-1.i [2019-10-15 01:32:55,323 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 01:32:55,331 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 01:32:55,344 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 01:32:55,370 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 01:32:55,370 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 01:32:55,371 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 01:32:55,371 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 01:32:55,372 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 01:32:55,372 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 01:32:55,373 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 01:32:55,373 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 01:32:55,399 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states. [2019-10-15 01:32:55,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-10-15 01:32:55,406 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:32:55,407 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:32:55,410 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:32:55,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:32:55,417 INFO L82 PathProgramCache]: Analyzing trace with hash 585848073, now seen corresponding path program 1 times [2019-10-15 01:32:55,429 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:32:55,429 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941329234] [2019-10-15 01:32:55,429 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:32:55,430 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:32:55,430 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:32:55,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:32:55,634 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:32:55,635 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941329234] [2019-10-15 01:32:55,636 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:32:55,636 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 01:32:55,637 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907812885] [2019-10-15 01:32:55,641 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:32:55,642 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:32:55,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:32:55,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:32:55,656 INFO L87 Difference]: Start difference. First operand 26 states. Second operand 3 states. [2019-10-15 01:32:55,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:32:55,697 INFO L93 Difference]: Finished difference Result 47 states and 68 transitions. [2019-10-15 01:32:55,697 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:32:55,699 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2019-10-15 01:32:55,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:32:55,710 INFO L225 Difference]: With dead ends: 47 [2019-10-15 01:32:55,710 INFO L226 Difference]: Without dead ends: 24 [2019-10-15 01:32:55,716 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:32:55,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-10-15 01:32:55,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2019-10-15 01:32:55,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-10-15 01:32:55,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 33 transitions. [2019-10-15 01:32:55,783 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 33 transitions. Word has length 19 [2019-10-15 01:32:55,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:32:55,785 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 33 transitions. [2019-10-15 01:32:55,785 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:32:55,785 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 33 transitions. [2019-10-15 01:32:55,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-10-15 01:32:55,787 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:32:55,788 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:32:55,788 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:32:55,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:32:55,789 INFO L82 PathProgramCache]: Analyzing trace with hash 1643282624, now seen corresponding path program 1 times [2019-10-15 01:32:55,790 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:32:55,790 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922467001] [2019-10-15 01:32:55,790 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:32:55,790 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:32:55,791 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:32:55,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:32:55,878 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-15 01:32:55,878 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922467001] [2019-10-15 01:32:55,879 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:32:55,879 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 01:32:55,879 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342771669] [2019-10-15 01:32:55,881 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:32:55,881 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:32:55,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:32:55,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:32:55,883 INFO L87 Difference]: Start difference. First operand 24 states and 33 transitions. Second operand 3 states. [2019-10-15 01:32:55,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:32:55,959 INFO L93 Difference]: Finished difference Result 48 states and 72 transitions. [2019-10-15 01:32:55,962 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:32:55,962 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2019-10-15 01:32:55,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:32:55,964 INFO L225 Difference]: With dead ends: 48 [2019-10-15 01:32:55,964 INFO L226 Difference]: Without dead ends: 32 [2019-10-15 01:32:55,966 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:32:55,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-10-15 01:32:55,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2019-10-15 01:32:55,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-10-15 01:32:55,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 41 transitions. [2019-10-15 01:32:55,978 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 41 transitions. Word has length 20 [2019-10-15 01:32:55,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:32:55,978 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 41 transitions. [2019-10-15 01:32:55,979 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:32:55,979 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 41 transitions. [2019-10-15 01:32:55,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-10-15 01:32:55,980 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:32:55,980 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:32:55,981 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:32:55,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:32:55,981 INFO L82 PathProgramCache]: Analyzing trace with hash 96487886, now seen corresponding path program 1 times [2019-10-15 01:32:55,981 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:32:55,982 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233719401] [2019-10-15 01:32:55,982 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:32:55,982 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:32:55,982 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:32:56,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:32:56,129 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-10-15 01:32:56,129 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233719401] [2019-10-15 01:32:56,130 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036140628] [2019-10-15 01:32:56,130 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:32:56,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:32:56,220 INFO L256 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:32:56,228 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:32:56,303 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-10-15 01:32:56,304 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:32:56,340 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-10-15 01:32:56,341 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [292391686] [2019-10-15 01:32:56,367 INFO L162 IcfgInterpreter]: Started Sifa with 20 locations of interest [2019-10-15 01:32:56,367 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:32:56,374 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:32:56,382 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:32:56,382 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:32:56,518 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:32:58,712 WARN L191 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 38 [2019-10-15 01:32:59,014 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 29 for LOIs [2019-10-15 01:32:59,024 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:32:59,029 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:32:59,364 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:32:59,364 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 11] total 18 [2019-10-15 01:32:59,365 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770047523] [2019-10-15 01:32:59,367 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-10-15 01:32:59,368 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:32:59,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-10-15 01:32:59,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2019-10-15 01:32:59,370 INFO L87 Difference]: Start difference. First operand 32 states and 41 transitions. Second operand 18 states. [2019-10-15 01:33:00,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:33:00,252 INFO L93 Difference]: Finished difference Result 77 states and 105 transitions. [2019-10-15 01:33:00,252 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-10-15 01:33:00,253 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 28 [2019-10-15 01:33:00,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:33:00,254 INFO L225 Difference]: With dead ends: 77 [2019-10-15 01:33:00,255 INFO L226 Difference]: Without dead ends: 52 [2019-10-15 01:33:00,256 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=145, Invalid=785, Unknown=0, NotChecked=0, Total=930 [2019-10-15 01:33:00,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2019-10-15 01:33:00,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 43. [2019-10-15 01:33:00,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2019-10-15 01:33:00,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 52 transitions. [2019-10-15 01:33:00,266 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 52 transitions. Word has length 28 [2019-10-15 01:33:00,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:33:00,267 INFO L462 AbstractCegarLoop]: Abstraction has 43 states and 52 transitions. [2019-10-15 01:33:00,267 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-10-15 01:33:00,267 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 52 transitions. [2019-10-15 01:33:00,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-10-15 01:33:00,268 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:33:00,268 INFO L380 BasicCegarLoop]: trace histogram [4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:33:00,473 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:33:00,473 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:33:00,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:33:00,474 INFO L82 PathProgramCache]: Analyzing trace with hash -240069559, now seen corresponding path program 2 times [2019-10-15 01:33:00,474 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:33:00,475 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655944134] [2019-10-15 01:33:00,475 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:33:00,475 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:33:00,475 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:33:00,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:33:00,587 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2019-10-15 01:33:00,588 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655944134] [2019-10-15 01:33:00,588 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397361626] [2019-10-15 01:33:00,588 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:33:00,697 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-10-15 01:33:00,698 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:33:00,700 INFO L256 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-15 01:33:00,707 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:33:00,728 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2019-10-15 01:33:00,729 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:33:00,763 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2019-10-15 01:33:00,763 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1368468652] [2019-10-15 01:33:00,767 INFO L162 IcfgInterpreter]: Started Sifa with 20 locations of interest [2019-10-15 01:33:00,767 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:33:00,768 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:33:00,768 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:33:00,768 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:33:00,812 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:33:02,512 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 29 for LOIs [2019-10-15 01:33:02,521 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:33:02,525 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:33:02,805 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:33:02,806 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 11] total 19 [2019-10-15 01:33:02,806 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280776344] [2019-10-15 01:33:02,807 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-10-15 01:33:02,807 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:33:02,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-10-15 01:33:02,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2019-10-15 01:33:02,808 INFO L87 Difference]: Start difference. First operand 43 states and 52 transitions. Second operand 19 states. [2019-10-15 01:33:03,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:33:03,693 INFO L93 Difference]: Finished difference Result 114 states and 162 transitions. [2019-10-15 01:33:03,697 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-10-15 01:33:03,698 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 39 [2019-10-15 01:33:03,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:33:03,699 INFO L225 Difference]: With dead ends: 114 [2019-10-15 01:33:03,699 INFO L226 Difference]: Without dead ends: 84 [2019-10-15 01:33:03,700 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=186, Invalid=806, Unknown=0, NotChecked=0, Total=992 [2019-10-15 01:33:03,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2019-10-15 01:33:03,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 75. [2019-10-15 01:33:03,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2019-10-15 01:33:03,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 84 transitions. [2019-10-15 01:33:03,723 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 84 transitions. Word has length 39 [2019-10-15 01:33:03,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:33:03,724 INFO L462 AbstractCegarLoop]: Abstraction has 75 states and 84 transitions. [2019-10-15 01:33:03,724 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-10-15 01:33:03,724 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 84 transitions. [2019-10-15 01:33:03,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2019-10-15 01:33:03,726 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:33:03,726 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:33:03,931 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:33:03,932 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:33:03,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:33:03,932 INFO L82 PathProgramCache]: Analyzing trace with hash 1717335881, now seen corresponding path program 3 times [2019-10-15 01:33:03,933 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:33:03,933 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753411537] [2019-10-15 01:33:03,933 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:33:03,934 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:33:03,934 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:33:04,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:33:04,136 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2019-10-15 01:33:04,137 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753411537] [2019-10-15 01:33:04,137 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [687724481] [2019-10-15 01:33:04,137 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:33:04,262 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-15 01:33:04,264 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:33:04,269 INFO L256 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-15 01:33:04,279 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:33:04,303 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2019-10-15 01:33:04,304 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:33:04,361 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2019-10-15 01:33:04,362 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1150300978] [2019-10-15 01:33:04,364 INFO L162 IcfgInterpreter]: Started Sifa with 20 locations of interest [2019-10-15 01:33:04,364 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:33:04,364 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:33:04,364 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:33:04,365 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:33:04,380 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:33:04,999 WARN L191 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 41 [2019-10-15 01:33:05,202 WARN L191 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 41 [2019-10-15 01:33:06,008 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 29 for LOIs [2019-10-15 01:33:06,015 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:33:06,018 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:33:06,279 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:33:06,279 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 11] total 23 [2019-10-15 01:33:06,279 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025312267] [2019-10-15 01:33:06,281 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-10-15 01:33:06,281 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:33:06,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-10-15 01:33:06,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=399, Unknown=0, NotChecked=0, Total=506 [2019-10-15 01:33:06,282 INFO L87 Difference]: Start difference. First operand 75 states and 84 transitions. Second operand 23 states. [2019-10-15 01:33:07,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:33:07,096 INFO L93 Difference]: Finished difference Result 155 states and 178 transitions. [2019-10-15 01:33:07,097 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-10-15 01:33:07,097 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 71 [2019-10-15 01:33:07,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:33:07,099 INFO L225 Difference]: With dead ends: 155 [2019-10-15 01:33:07,099 INFO L226 Difference]: Without dead ends: 90 [2019-10-15 01:33:07,100 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 199 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 414 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=292, Invalid=1268, Unknown=0, NotChecked=0, Total=1560 [2019-10-15 01:33:07,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2019-10-15 01:33:07,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 81. [2019-10-15 01:33:07,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2019-10-15 01:33:07,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 90 transitions. [2019-10-15 01:33:07,114 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 90 transitions. Word has length 71 [2019-10-15 01:33:07,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:33:07,114 INFO L462 AbstractCegarLoop]: Abstraction has 81 states and 90 transitions. [2019-10-15 01:33:07,115 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-10-15 01:33:07,115 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 90 transitions. [2019-10-15 01:33:07,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2019-10-15 01:33:07,116 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:33:07,116 INFO L380 BasicCegarLoop]: trace histogram [10, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:33:07,323 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:33:07,324 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:33:07,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:33:07,324 INFO L82 PathProgramCache]: Analyzing trace with hash -407034903, now seen corresponding path program 4 times [2019-10-15 01:33:07,324 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:33:07,324 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697516586] [2019-10-15 01:33:07,324 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:33:07,324 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:33:07,324 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:33:07,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:33:07,520 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2019-10-15 01:33:07,520 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697516586] [2019-10-15 01:33:07,521 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678213303] [2019-10-15 01:33:07,521 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:33:07,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:33:07,671 INFO L256 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 12 conjunts are in the unsatisfiable core [2019-10-15 01:33:07,684 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:33:07,712 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2019-10-15 01:33:07,714 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:33:07,900 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2019-10-15 01:33:07,900 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [958739747] [2019-10-15 01:33:07,902 INFO L162 IcfgInterpreter]: Started Sifa with 20 locations of interest [2019-10-15 01:33:07,902 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:33:07,902 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:33:07,903 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:33:07,903 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:33:07,920 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:33:09,357 WARN L191 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 41 [2019-10-15 01:33:09,579 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 29 for LOIs [2019-10-15 01:33:09,584 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:33:09,587 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:33:09,883 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:33:09,884 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13, 11] total 35 [2019-10-15 01:33:09,884 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712261448] [2019-10-15 01:33:09,885 INFO L442 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-10-15 01:33:09,885 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:33:09,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-10-15 01:33:09,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=329, Invalid=861, Unknown=0, NotChecked=0, Total=1190 [2019-10-15 01:33:09,887 INFO L87 Difference]: Start difference. First operand 81 states and 90 transitions. Second operand 35 states. [2019-10-15 01:33:11,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:33:11,084 INFO L93 Difference]: Finished difference Result 167 states and 196 transitions. [2019-10-15 01:33:11,084 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-10-15 01:33:11,084 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 77 [2019-10-15 01:33:11,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:33:11,086 INFO L225 Difference]: With dead ends: 167 [2019-10-15 01:33:11,086 INFO L226 Difference]: Without dead ends: 102 [2019-10-15 01:33:11,088 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 211 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1029 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=934, Invalid=3098, Unknown=0, NotChecked=0, Total=4032 [2019-10-15 01:33:11,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2019-10-15 01:33:11,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 93. [2019-10-15 01:33:11,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2019-10-15 01:33:11,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 102 transitions. [2019-10-15 01:33:11,102 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 102 transitions. Word has length 77 [2019-10-15 01:33:11,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:33:11,102 INFO L462 AbstractCegarLoop]: Abstraction has 93 states and 102 transitions. [2019-10-15 01:33:11,102 INFO L463 AbstractCegarLoop]: Interpolant automaton has 35 states. [2019-10-15 01:33:11,102 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 102 transitions. [2019-10-15 01:33:11,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2019-10-15 01:33:11,104 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:33:11,104 INFO L380 BasicCegarLoop]: trace histogram [22, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:33:11,308 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:33:11,308 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:33:11,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:33:11,309 INFO L82 PathProgramCache]: Analyzing trace with hash 745837865, now seen corresponding path program 5 times [2019-10-15 01:33:11,310 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:33:11,310 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455585133] [2019-10-15 01:33:11,310 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:33:11,310 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:33:11,311 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:33:11,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:33:11,620 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2019-10-15 01:33:11,620 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455585133] [2019-10-15 01:33:11,620 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [421946326] [2019-10-15 01:33:11,620 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:33:13,170 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-10-15 01:33:13,171 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:33:13,174 INFO L256 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 40 conjunts are in the unsatisfiable core [2019-10-15 01:33:13,178 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:33:13,364 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 40 proven. 21 refuted. 0 times theorem prover too weak. 360 trivial. 0 not checked. [2019-10-15 01:33:13,364 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:33:13,536 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 388 trivial. 0 not checked. [2019-10-15 01:33:13,537 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1954326906] [2019-10-15 01:33:13,538 INFO L162 IcfgInterpreter]: Started Sifa with 20 locations of interest [2019-10-15 01:33:13,538 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:33:13,539 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:33:13,539 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:33:13,539 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:33:13,554 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:33:15,131 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 29 for LOIs [2019-10-15 01:33:15,141 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:33:15,143 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:33:15,532 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:33:15,532 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 11, 9, 11] total 51 [2019-10-15 01:33:15,532 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899335739] [2019-10-15 01:33:15,534 INFO L442 AbstractCegarLoop]: Interpolant automaton has 51 states [2019-10-15 01:33:15,534 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:33:15,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2019-10-15 01:33:15,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=489, Invalid=2061, Unknown=0, NotChecked=0, Total=2550 [2019-10-15 01:33:15,536 INFO L87 Difference]: Start difference. First operand 93 states and 102 transitions. Second operand 51 states. [2019-10-15 01:33:18,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:33:18,799 INFO L93 Difference]: Finished difference Result 232 states and 314 transitions. [2019-10-15 01:33:18,800 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2019-10-15 01:33:18,800 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 89 [2019-10-15 01:33:18,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:33:18,803 INFO L225 Difference]: With dead ends: 232 [2019-10-15 01:33:18,803 INFO L226 Difference]: Without dead ends: 167 [2019-10-15 01:33:18,807 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 352 GetRequests, 258 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2404 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1508, Invalid=7612, Unknown=0, NotChecked=0, Total=9120 [2019-10-15 01:33:18,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2019-10-15 01:33:18,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 158. [2019-10-15 01:33:18,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2019-10-15 01:33:18,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 167 transitions. [2019-10-15 01:33:18,836 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 167 transitions. Word has length 89 [2019-10-15 01:33:18,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:33:18,837 INFO L462 AbstractCegarLoop]: Abstraction has 158 states and 167 transitions. [2019-10-15 01:33:18,837 INFO L463 AbstractCegarLoop]: Interpolant automaton has 51 states. [2019-10-15 01:33:18,837 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 167 transitions. [2019-10-15 01:33:18,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2019-10-15 01:33:18,840 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:33:18,840 INFO L380 BasicCegarLoop]: trace histogram [23, 14, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:33:19,047 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:33:19,048 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:33:19,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:33:19,049 INFO L82 PathProgramCache]: Analyzing trace with hash 1310060960, now seen corresponding path program 6 times [2019-10-15 01:33:19,049 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:33:19,049 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397777878] [2019-10-15 01:33:19,050 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:33:19,050 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:33:19,050 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:33:19,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:33:19,522 INFO L134 CoverageAnalysis]: Checked inductivity of 1116 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 840 trivial. 0 not checked. [2019-10-15 01:33:19,523 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397777878] [2019-10-15 01:33:19,523 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795595510] [2019-10-15 01:33:19,523 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:33:19,772 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-15 01:33:19,772 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:33:19,775 INFO L256 TraceCheckSpWp]: Trace formula consists of 711 conjuncts, 25 conjunts are in the unsatisfiable core [2019-10-15 01:33:19,780 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:33:19,810 INFO L134 CoverageAnalysis]: Checked inductivity of 1116 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 840 trivial. 0 not checked. [2019-10-15 01:33:19,810 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:33:20,566 INFO L134 CoverageAnalysis]: Checked inductivity of 1116 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 840 trivial. 0 not checked. [2019-10-15 01:33:20,567 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [663592243] [2019-10-15 01:33:20,568 INFO L162 IcfgInterpreter]: Started Sifa with 20 locations of interest [2019-10-15 01:33:20,568 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:33:20,569 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:33:20,569 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:33:20,569 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:33:20,583 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:33:21,221 WARN L191 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 38 [2019-10-15 01:33:21,470 WARN L191 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 41 [2019-10-15 01:33:22,304 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 29 for LOIs [2019-10-15 01:33:22,309 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:33:22,312 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:33:22,715 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:33:22,715 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26, 11] total 61 [2019-10-15 01:33:22,715 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411812385] [2019-10-15 01:33:22,717 INFO L442 AbstractCegarLoop]: Interpolant automaton has 61 states [2019-10-15 01:33:22,717 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:33:22,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2019-10-15 01:33:22,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1304, Invalid=2356, Unknown=0, NotChecked=0, Total=3660 [2019-10-15 01:33:22,719 INFO L87 Difference]: Start difference. First operand 158 states and 167 transitions. Second operand 61 states. [2019-10-15 01:33:25,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:33:25,467 INFO L93 Difference]: Finished difference Result 321 states and 363 transitions. [2019-10-15 01:33:25,468 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2019-10-15 01:33:25,468 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 154 [2019-10-15 01:33:25,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:33:25,470 INFO L225 Difference]: With dead ends: 321 [2019-10-15 01:33:25,470 INFO L226 Difference]: Without dead ends: 192 [2019-10-15 01:33:25,475 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 543 GetRequests, 429 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2979 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=3807, Invalid=9533, Unknown=0, NotChecked=0, Total=13340 [2019-10-15 01:33:25,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2019-10-15 01:33:25,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 183. [2019-10-15 01:33:25,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2019-10-15 01:33:25,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 192 transitions. [2019-10-15 01:33:25,500 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 192 transitions. Word has length 154 [2019-10-15 01:33:25,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:33:25,500 INFO L462 AbstractCegarLoop]: Abstraction has 183 states and 192 transitions. [2019-10-15 01:33:25,500 INFO L463 AbstractCegarLoop]: Interpolant automaton has 61 states. [2019-10-15 01:33:25,500 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 192 transitions. [2019-10-15 01:33:25,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2019-10-15 01:33:25,504 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:33:25,504 INFO L380 BasicCegarLoop]: trace histogram [48, 14, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:33:25,708 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:33:25,709 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:33:25,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:33:25,710 INFO L82 PathProgramCache]: Analyzing trace with hash -201028471, now seen corresponding path program 7 times [2019-10-15 01:33:25,710 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:33:25,711 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442640066] [2019-10-15 01:33:25,711 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:33:25,711 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:33:25,712 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:33:25,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:33:26,897 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 840 trivial. 0 not checked. [2019-10-15 01:33:26,897 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442640066] [2019-10-15 01:33:26,897 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [579961246] [2019-10-15 01:33:26,897 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:33:27,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:33:27,195 INFO L256 TraceCheckSpWp]: Trace formula consists of 861 conjuncts, 50 conjunts are in the unsatisfiable core [2019-10-15 01:33:27,199 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:33:27,232 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 840 trivial. 0 not checked. [2019-10-15 01:33:27,233 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:33:29,862 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 840 trivial. 0 not checked. [2019-10-15 01:33:29,863 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1696616025] [2019-10-15 01:33:29,865 INFO L162 IcfgInterpreter]: Started Sifa with 20 locations of interest [2019-10-15 01:33:29,865 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:33:29,865 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:33:29,866 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:33:29,866 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:33:29,895 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:33:30,181 WARN L191 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 38 [2019-10-15 01:33:30,435 WARN L191 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 41 [2019-10-15 01:33:30,639 WARN L191 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 41 [2019-10-15 01:33:30,912 WARN L191 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 41 [2019-10-15 01:33:31,136 WARN L191 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 41 [2019-10-15 01:33:31,770 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 29 for LOIs [2019-10-15 01:33:31,775 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:33:31,777 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:33:32,305 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:33:32,305 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51, 51, 11] total 111 [2019-10-15 01:33:32,305 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629232945] [2019-10-15 01:33:32,307 INFO L442 AbstractCegarLoop]: Interpolant automaton has 111 states [2019-10-15 01:33:32,307 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:33:32,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2019-10-15 01:33:32,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5079, Invalid=7131, Unknown=0, NotChecked=0, Total=12210 [2019-10-15 01:33:32,311 INFO L87 Difference]: Start difference. First operand 183 states and 192 transitions. Second operand 111 states.