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_init8_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 01:34:13,501 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 01:34:13,504 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 01:34:13,520 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-10-15 01:34:13,530 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 01:34:13,531 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 01:34:13,532 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 01:34:13,533 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 01:34:13,534 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 01:34:13,535 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 01:34:13,536 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 01:34:13,538 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 01:34:13,540 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 01:34:13,541 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 01:34:13,542 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 01:34:13,543 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 01:34:13,545 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 01:34:13,556 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 01:34:13,559 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 01:34:13,562 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 01:34:13,563 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 01:34:13,585 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 01:34:13,585 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 01:34:13,586 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 01:34:13,586 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 01:34:13,586 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 01:34:13,587 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 01:34:13,587 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 01:34:13,587 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 01:34:13,587 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 01:34:13,587 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 01:34:13,588 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 01:34:13,588 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 01:34:13,588 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 01:34:13,588 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 01:34:13,588 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 01:34:13,589 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 01:34:13,589 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 01:34:13,589 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 01:34:13,589 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 01:34:13,590 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 01:34:13,590 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 01:34:13,590 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:34:13,590 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 01:34:13,590 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 01:34:13,591 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 01:34:13,591 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 01:34:13,591 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 01:34:13,591 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 01:34:13,591 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 01:34:13,869 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 01:34:13,882 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 01:34:13,885 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 01:34:13,887 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 01:34:13,887 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 01:34:13,888 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_init8_ground-1.i [2019-10-15 01:34:13,957 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6894b10cb/1014c65bc2c349deb7411faec440ea54/FLAG243adca02 [2019-10-15 01:34:14,401 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 01:34:14,402 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_init8_ground-1.i [2019-10-15 01:34:14,408 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6894b10cb/1014c65bc2c349deb7411faec440ea54/FLAG243adca02 [2019-10-15 01:34:14,804 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6894b10cb/1014c65bc2c349deb7411faec440ea54 [2019-10-15 01:34:14,815 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 01:34:14,817 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 01:34:14,818 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 01:34:14,818 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 01:34:14,822 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 01:34:14,823 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:34:14" (1/1) ... [2019-10-15 01:34:14,825 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1e9b8ec1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:34:14, skipping insertion in model container [2019-10-15 01:34:14,825 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:34:14" (1/1) ... [2019-10-15 01:34:14,832 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 01:34:14,846 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 01:34:15,032 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:34:15,036 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 01:34:15,065 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:34:15,168 INFO L192 MainTranslator]: Completed translation [2019-10-15 01:34:15,169 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:34:15 WrapperNode [2019-10-15 01:34:15,169 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 01:34:15,170 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 01:34:15,170 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 01:34:15,170 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 01:34:15,180 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:34:15" (1/1) ... [2019-10-15 01:34:15,181 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:34:15" (1/1) ... [2019-10-15 01:34:15,188 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:34:15" (1/1) ... [2019-10-15 01:34:15,188 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:34:15" (1/1) ... [2019-10-15 01:34:15,196 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:34:15" (1/1) ... [2019-10-15 01:34:15,204 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:34:15" (1/1) ... [2019-10-15 01:34:15,207 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:34:15" (1/1) ... [2019-10-15 01:34:15,210 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 01:34:15,213 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 01:34:15,213 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 01:34:15,214 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 01:34:15,215 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:34:15" (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 01:34:15,271 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 01:34:15,271 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 01:34:15,271 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-15 01:34:15,271 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 01:34:15,272 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 01:34:15,272 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-15 01:34:15,272 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 01:34:15,272 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-15 01:34:15,272 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-15 01:34:15,272 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-15 01:34:15,273 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-15 01:34:15,273 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 01:34:15,273 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 01:34:15,693 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 01:34:15,693 INFO L284 CfgBuilder]: Removed 9 assume(true) statements. [2019-10-15 01:34:15,694 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:34:15 BoogieIcfgContainer [2019-10-15 01:34:15,695 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 01:34:15,696 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 01:34:15,696 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 01:34:15,699 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 01:34:15,700 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 01:34:14" (1/3) ... [2019-10-15 01:34:15,701 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5dc5d710 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:34:15, skipping insertion in model container [2019-10-15 01:34:15,701 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:34:15" (2/3) ... [2019-10-15 01:34:15,701 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5dc5d710 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:34:15, skipping insertion in model container [2019-10-15 01:34:15,701 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:34:15" (3/3) ... [2019-10-15 01:34:15,703 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_init8_ground-1.i [2019-10-15 01:34:15,711 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 01:34:15,718 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 01:34:15,726 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 01:34:15,750 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 01:34:15,750 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 01:34:15,750 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 01:34:15,751 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 01:34:15,751 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 01:34:15,751 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 01:34:15,751 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 01:34:15,751 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 01:34:15,768 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2019-10-15 01:34:15,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-10-15 01:34:15,773 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:34:15,774 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:34:15,776 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:34:15,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:34:15,780 INFO L82 PathProgramCache]: Analyzing trace with hash 1093654900, now seen corresponding path program 1 times [2019-10-15 01:34:15,787 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:34:15,788 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431449203] [2019-10-15 01:34:15,788 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:34:15,788 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:34:15,789 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:34:15,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:34:15,952 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 01:34:15,955 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431449203] [2019-10-15 01:34:15,958 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:34:15,958 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 01:34:15,959 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697891283] [2019-10-15 01:34:15,964 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:34:15,965 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:34:15,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:34:15,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:34:15,987 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 3 states. [2019-10-15 01:34:16,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:34:16,116 INFO L93 Difference]: Finished difference Result 52 states and 78 transitions. [2019-10-15 01:34:16,118 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:34:16,119 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2019-10-15 01:34:16,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:34:16,131 INFO L225 Difference]: With dead ends: 52 [2019-10-15 01:34:16,132 INFO L226 Difference]: Without dead ends: 30 [2019-10-15 01:34:16,138 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 01:34:16,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-10-15 01:34:16,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2019-10-15 01:34:16,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-10-15 01:34:16,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 38 transitions. [2019-10-15 01:34:16,194 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 38 transitions. Word has length 18 [2019-10-15 01:34:16,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:34:16,195 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 38 transitions. [2019-10-15 01:34:16,195 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:34:16,196 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 38 transitions. [2019-10-15 01:34:16,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-10-15 01:34:16,197 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:34:16,197 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] [2019-10-15 01:34:16,198 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:34:16,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:34:16,199 INFO L82 PathProgramCache]: Analyzing trace with hash -1527898784, now seen corresponding path program 1 times [2019-10-15 01:34:16,199 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:34:16,199 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686227422] [2019-10-15 01:34:16,199 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:34:16,200 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:34:16,200 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:34:16,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:34:16,363 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-10-15 01:34:16,364 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686227422] [2019-10-15 01:34:16,369 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [421844341] [2019-10-15 01:34:16,370 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 01:34:16,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:34:16,431 INFO L256 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:34:16,438 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:34:16,473 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-10-15 01:34:16,474 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:34:16,512 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-10-15 01:34:16,512 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1614001809] [2019-10-15 01:34:16,544 INFO L162 IcfgInterpreter]: Started Sifa with 19 locations of interest [2019-10-15 01:34:16,545 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:34:16,552 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:34:16,561 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:34:16,562 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:34:16,762 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:34:18,321 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 28 for LOIs [2019-10-15 01:34:18,341 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:34:18,347 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:34:19,050 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:34:19,050 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 10] total 17 [2019-10-15 01:34:19,050 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476189710] [2019-10-15 01:34:19,055 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-10-15 01:34:19,056 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:34:19,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-10-15 01:34:19,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2019-10-15 01:34:19,058 INFO L87 Difference]: Start difference. First operand 30 states and 38 transitions. Second operand 17 states. [2019-10-15 01:34:19,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:34:19,968 INFO L93 Difference]: Finished difference Result 86 states and 125 transitions. [2019-10-15 01:34:19,968 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-10-15 01:34:19,969 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 26 [2019-10-15 01:34:19,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:34:19,971 INFO L225 Difference]: With dead ends: 86 [2019-10-15 01:34:19,971 INFO L226 Difference]: Without dead ends: 63 [2019-10-15 01:34:19,972 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 58 SyntacticMatches, 14 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=141, Invalid=615, Unknown=0, NotChecked=0, Total=756 [2019-10-15 01:34:19,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2019-10-15 01:34:19,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 54. [2019-10-15 01:34:19,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2019-10-15 01:34:19,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 62 transitions. [2019-10-15 01:34:19,986 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 62 transitions. Word has length 26 [2019-10-15 01:34:19,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:34:19,987 INFO L462 AbstractCegarLoop]: Abstraction has 54 states and 62 transitions. [2019-10-15 01:34:19,987 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-10-15 01:34:19,987 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 62 transitions. [2019-10-15 01:34:19,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2019-10-15 01:34:19,988 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:34:19,989 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:34:20,200 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:34:20,201 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:34:20,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:34:20,202 INFO L82 PathProgramCache]: Analyzing trace with hash -1892290956, now seen corresponding path program 2 times [2019-10-15 01:34:20,202 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:34:20,203 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247074005] [2019-10-15 01:34:20,203 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:34:20,204 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:34:20,204 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:34:20,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:34:20,409 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2019-10-15 01:34:20,410 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247074005] [2019-10-15 01:34:20,410 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1841361054] [2019-10-15 01:34:20,410 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 01:34:20,546 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-15 01:34:20,547 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:34:20,548 INFO L256 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-15 01:34:20,552 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:34:20,567 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2019-10-15 01:34:20,567 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:34:20,628 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2019-10-15 01:34:20,629 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1429045146] [2019-10-15 01:34:20,631 INFO L162 IcfgInterpreter]: Started Sifa with 19 locations of interest [2019-10-15 01:34:20,632 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:34:20,632 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:34:20,633 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:34:20,633 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:34:20,674 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:34:21,720 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 28 for LOIs [2019-10-15 01:34:21,728 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:34:21,732 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:34:22,601 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:34:22,602 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 10] total 23 [2019-10-15 01:34:22,602 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86224368] [2019-10-15 01:34:22,604 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-10-15 01:34:22,604 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:34:22,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-10-15 01:34:22,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=399, Unknown=0, NotChecked=0, Total=506 [2019-10-15 01:34:22,605 INFO L87 Difference]: Start difference. First operand 54 states and 62 transitions. Second operand 23 states. [2019-10-15 01:34:23,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:34:23,917 INFO L93 Difference]: Finished difference Result 155 states and 218 transitions. [2019-10-15 01:34:23,918 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-10-15 01:34:23,918 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 50 [2019-10-15 01:34:23,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:34:23,921 INFO L225 Difference]: With dead ends: 155 [2019-10-15 01:34:23,921 INFO L226 Difference]: Without dead ends: 111 [2019-10-15 01:34:23,923 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 112 SyntacticMatches, 35 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 999 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=312, Invalid=1248, Unknown=0, NotChecked=0, Total=1560 [2019-10-15 01:34:23,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2019-10-15 01:34:23,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 102. [2019-10-15 01:34:23,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2019-10-15 01:34:23,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 110 transitions. [2019-10-15 01:34:23,942 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 110 transitions. Word has length 50 [2019-10-15 01:34:23,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:34:23,942 INFO L462 AbstractCegarLoop]: Abstraction has 102 states and 110 transitions. [2019-10-15 01:34:23,942 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-10-15 01:34:23,943 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 110 transitions. [2019-10-15 01:34:23,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2019-10-15 01:34:23,946 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:34:23,946 INFO L380 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:34:24,162 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:34:24,165 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:34:24,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:34:24,165 INFO L82 PathProgramCache]: Analyzing trace with hash 224910836, now seen corresponding path program 3 times [2019-10-15 01:34:24,165 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:34:24,165 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618653105] [2019-10-15 01:34:24,165 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:34:24,166 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:34:24,166 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:34:24,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:34:24,447 INFO L134 CoverageAnalysis]: Checked inductivity of 440 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2019-10-15 01:34:24,447 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618653105] [2019-10-15 01:34:24,447 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182776821] [2019-10-15 01:34:24,448 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 01:34:24,565 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-15 01:34:24,566 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:34:24,568 INFO L256 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 12 conjunts are in the unsatisfiable core [2019-10-15 01:34:24,573 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:34:24,599 INFO L134 CoverageAnalysis]: Checked inductivity of 440 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2019-10-15 01:34:24,600 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:34:24,823 INFO L134 CoverageAnalysis]: Checked inductivity of 440 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2019-10-15 01:34:24,824 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1407354091] [2019-10-15 01:34:24,826 INFO L162 IcfgInterpreter]: Started Sifa with 19 locations of interest [2019-10-15 01:34:24,826 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:34:24,826 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:34:24,827 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:34:24,827 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:34:24,862 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:34:25,819 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 28 for LOIs [2019-10-15 01:34:25,826 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:34:25,829 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:34:27,428 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:34:27,428 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13, 10] total 35 [2019-10-15 01:34:27,428 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372454307] [2019-10-15 01:34:27,430 INFO L442 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-10-15 01:34:27,430 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:34:27,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-10-15 01:34:27,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=329, Invalid=861, Unknown=0, NotChecked=0, Total=1190 [2019-10-15 01:34:27,433 INFO L87 Difference]: Start difference. First operand 102 states and 110 transitions. Second operand 35 states. [2019-10-15 01:34:29,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:34:29,656 INFO L93 Difference]: Finished difference Result 293 states and 404 transitions. [2019-10-15 01:34:29,656 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-10-15 01:34:29,656 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 98 [2019-10-15 01:34:29,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:34:29,660 INFO L225 Difference]: With dead ends: 293 [2019-10-15 01:34:29,660 INFO L226 Difference]: Without dead ends: 207 [2019-10-15 01:34:29,664 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 336 GetRequests, 197 SyntacticMatches, 77 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3702 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=978, Invalid=3054, Unknown=0, NotChecked=0, Total=4032 [2019-10-15 01:34:29,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2019-10-15 01:34:29,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 198. [2019-10-15 01:34:29,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2019-10-15 01:34:29,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 206 transitions. [2019-10-15 01:34:29,692 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 206 transitions. Word has length 98 [2019-10-15 01:34:29,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:34:29,693 INFO L462 AbstractCegarLoop]: Abstraction has 198 states and 206 transitions. [2019-10-15 01:34:29,693 INFO L463 AbstractCegarLoop]: Interpolant automaton has 35 states. [2019-10-15 01:34:29,693 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 206 transitions. [2019-10-15 01:34:29,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2019-10-15 01:34:29,701 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:34:29,701 INFO L380 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:34:29,906 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:34:29,907 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:34:29,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:34:29,907 INFO L82 PathProgramCache]: Analyzing trace with hash -396239628, now seen corresponding path program 4 times [2019-10-15 01:34:29,908 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:34:29,908 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895217062] [2019-10-15 01:34:29,908 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:34:29,908 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:34:29,909 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:34:30,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:34:30,606 INFO L134 CoverageAnalysis]: Checked inductivity of 2024 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 1771 trivial. 0 not checked. [2019-10-15 01:34:30,606 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895217062] [2019-10-15 01:34:30,606 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2120358020] [2019-10-15 01:34:30,607 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 01:34:30,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:34:30,802 INFO L256 TraceCheckSpWp]: Trace formula consists of 776 conjuncts, 24 conjunts are in the unsatisfiable core [2019-10-15 01:34:30,816 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:34:30,850 INFO L134 CoverageAnalysis]: Checked inductivity of 2024 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 1771 trivial. 0 not checked. [2019-10-15 01:34:30,850 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:34:31,755 INFO L134 CoverageAnalysis]: Checked inductivity of 2024 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 1771 trivial. 0 not checked. [2019-10-15 01:34:31,755 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [846017723] [2019-10-15 01:34:31,760 INFO L162 IcfgInterpreter]: Started Sifa with 19 locations of interest [2019-10-15 01:34:31,760 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:34:31,761 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:34:31,761 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:34:31,762 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:34:31,797 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:34:32,453 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 28 for LOIs [2019-10-15 01:34:32,467 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:34:32,471 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:34:36,123 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:34:36,124 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25, 10] total 59 [2019-10-15 01:34:36,124 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847187322] [2019-10-15 01:34:36,126 INFO L442 AbstractCegarLoop]: Interpolant automaton has 59 states [2019-10-15 01:34:36,127 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:34:36,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2019-10-15 01:34:36,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1205, Invalid=2217, Unknown=0, NotChecked=0, Total=3422 [2019-10-15 01:34:36,129 INFO L87 Difference]: Start difference. First operand 198 states and 206 transitions. Second operand 59 states. [2019-10-15 01:34:42,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:34:42,547 INFO L93 Difference]: Finished difference Result 569 states and 776 transitions. [2019-10-15 01:34:42,548 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2019-10-15 01:34:42,548 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 194 [2019-10-15 01:34:42,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:34:42,551 INFO L225 Difference]: With dead ends: 569 [2019-10-15 01:34:42,552 INFO L226 Difference]: Without dead ends: 399 [2019-10-15 01:34:42,556 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 660 GetRequests, 389 SyntacticMatches, 161 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14184 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=3606, Invalid=8826, Unknown=0, NotChecked=0, Total=12432 [2019-10-15 01:34:42,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2019-10-15 01:34:42,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 390. [2019-10-15 01:34:42,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 390 states. [2019-10-15 01:34:42,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 398 transitions. [2019-10-15 01:34:42,600 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 398 transitions. Word has length 194 [2019-10-15 01:34:42,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:34:42,601 INFO L462 AbstractCegarLoop]: Abstraction has 390 states and 398 transitions. [2019-10-15 01:34:42,601 INFO L463 AbstractCegarLoop]: Interpolant automaton has 59 states. [2019-10-15 01:34:42,601 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 398 transitions. [2019-10-15 01:34:42,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 387 [2019-10-15 01:34:42,609 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:34:42,609 INFO L380 BasicCegarLoop]: trace histogram [46, 46, 46, 46, 46, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:34:42,824 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:34:42,824 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:34:42,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:34:42,825 INFO L82 PathProgramCache]: Analyzing trace with hash 2070829812, now seen corresponding path program 5 times [2019-10-15 01:34:42,825 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:34:42,825 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856720188] [2019-10-15 01:34:42,825 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:34:42,826 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:34:42,826 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:34:43,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:34:44,651 INFO L134 CoverageAnalysis]: Checked inductivity of 8648 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 7567 trivial. 0 not checked. [2019-10-15 01:34:44,651 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856720188] [2019-10-15 01:34:44,651 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756532190] [2019-10-15 01:34:44,652 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