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_two_index_03.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 01:35:39,004 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 01:35:39,007 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 01:35:39,025 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-10-15 01:35:39,051 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 01:35:39,052 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 01:35:39,055 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 01:35:39,057 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 01:35:39,058 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 01:35:39,060 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 01:35:39,062 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 01:35:39,067 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 01:35:39,071 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 01:35:39,074 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 01:35:39,077 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 01:35:39,078 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 01:35:39,080 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 01:35:39,091 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 01:35:39,092 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 01:35:39,093 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 01:35:39,094 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 01:35:39,131 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 01:35:39,132 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 01:35:39,133 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 01:35:39,133 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 01:35:39,133 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 01:35:39,134 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 01:35:39,134 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 01:35:39,134 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 01:35:39,136 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 01:35:39,137 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 01:35:39,137 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 01:35:39,137 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 01:35:39,137 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 01:35:39,137 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 01:35:39,138 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 01:35:39,138 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 01:35:39,139 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 01:35:39,139 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 01:35:39,140 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 01:35:39,140 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 01:35:39,140 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 01:35:39,140 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:35:39,141 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 01:35:39,141 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 01:35:39,141 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 01:35:39,141 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 01:35:39,141 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 01:35:39,142 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 01:35:39,142 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 01:35:39,474 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 01:35:39,495 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 01:35:39,498 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 01:35:39,500 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 01:35:39,501 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 01:35:39,501 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_two_index_03.i [2019-10-15 01:35:39,579 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2b505dd20/dc06d04e1797460a9a651b06922b19d7/FLAG23df914fe [2019-10-15 01:35:40,053 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 01:35:40,054 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_two_index_03.i [2019-10-15 01:35:40,060 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2b505dd20/dc06d04e1797460a9a651b06922b19d7/FLAG23df914fe [2019-10-15 01:35:40,422 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2b505dd20/dc06d04e1797460a9a651b06922b19d7 [2019-10-15 01:35:40,432 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 01:35:40,434 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 01:35:40,435 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 01:35:40,435 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 01:35:40,439 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 01:35:40,440 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:35:40" (1/1) ... [2019-10-15 01:35:40,443 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5627da55 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:35:40, skipping insertion in model container [2019-10-15 01:35:40,443 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:35:40" (1/1) ... [2019-10-15 01:35:40,451 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 01:35:40,469 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 01:35:40,675 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:35:40,680 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 01:35:40,701 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:35:40,717 INFO L192 MainTranslator]: Completed translation [2019-10-15 01:35:40,717 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:35:40 WrapperNode [2019-10-15 01:35:40,718 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 01:35:40,718 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 01:35:40,718 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 01:35:40,718 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 01:35:40,807 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:35:40" (1/1) ... [2019-10-15 01:35:40,807 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:35:40" (1/1) ... [2019-10-15 01:35:40,816 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:35:40" (1/1) ... [2019-10-15 01:35:40,816 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:35:40" (1/1) ... [2019-10-15 01:35:40,823 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:35:40" (1/1) ... [2019-10-15 01:35:40,831 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:35:40" (1/1) ... [2019-10-15 01:35:40,832 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:35:40" (1/1) ... [2019-10-15 01:35:40,840 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 01:35:40,840 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 01:35:40,841 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 01:35:40,841 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 01:35:40,842 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:35:40" (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 01:35:40,896 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 01:35:40,896 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 01:35:40,896 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-15 01:35:40,896 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 01:35:40,896 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 01:35:40,897 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-15 01:35:40,897 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 01:35:40,897 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 01:35:40,897 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-15 01:35:40,897 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-15 01:35:40,897 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-15 01:35:40,898 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-15 01:35:40,898 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 01:35:40,898 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 01:35:41,219 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 01:35:41,219 INFO L284 CfgBuilder]: Removed 3 assume(true) statements. [2019-10-15 01:35:41,220 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:35:41 BoogieIcfgContainer [2019-10-15 01:35:41,220 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 01:35:41,221 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 01:35:41,221 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 01:35:41,224 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 01:35:41,225 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 01:35:40" (1/3) ... [2019-10-15 01:35:41,226 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7aab2285 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:35:41, skipping insertion in model container [2019-10-15 01:35:41,226 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:35:40" (2/3) ... [2019-10-15 01:35:41,226 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7aab2285 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:35:41, skipping insertion in model container [2019-10-15 01:35:41,226 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:35:41" (3/3) ... [2019-10-15 01:35:41,228 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_two_index_03.i [2019-10-15 01:35:41,238 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 01:35:41,247 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 01:35:41,258 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 01:35:41,288 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 01:35:41,288 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 01:35:41,288 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 01:35:41,288 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 01:35:41,288 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 01:35:41,288 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 01:35:41,289 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 01:35:41,289 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 01:35:41,307 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2019-10-15 01:35:41,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-10-15 01:35:41,313 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:35:41,314 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:35:41,317 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:35:41,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:35:41,323 INFO L82 PathProgramCache]: Analyzing trace with hash 328370140, now seen corresponding path program 1 times [2019-10-15 01:35:41,333 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:35:41,334 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234533463] [2019-10-15 01:35:41,334 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:35:41,334 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:35:41,335 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:35:41,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:35:41,535 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 01:35:41,535 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234533463] [2019-10-15 01:35:41,537 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:35:41,537 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 01:35:41,537 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886025943] [2019-10-15 01:35:41,543 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:35:41,543 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:35:41,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:35:41,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:35:41,562 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 3 states. [2019-10-15 01:35:41,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:35:41,612 INFO L93 Difference]: Finished difference Result 33 states and 40 transitions. [2019-10-15 01:35:41,613 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:35:41,614 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2019-10-15 01:35:41,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:35:41,623 INFO L225 Difference]: With dead ends: 33 [2019-10-15 01:35:41,624 INFO L226 Difference]: Without dead ends: 17 [2019-10-15 01:35:41,627 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 01:35:41,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2019-10-15 01:35:41,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2019-10-15 01:35:41,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-10-15 01:35:41,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2019-10-15 01:35:41,663 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 12 [2019-10-15 01:35:41,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:35:41,664 INFO L462 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2019-10-15 01:35:41,664 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:35:41,664 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2019-10-15 01:35:41,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-10-15 01:35:41,665 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:35:41,666 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:35:41,666 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:35:41,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:35:41,667 INFO L82 PathProgramCache]: Analyzing trace with hash 1896737256, now seen corresponding path program 1 times [2019-10-15 01:35:41,668 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:35:41,668 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397036503] [2019-10-15 01:35:41,668 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:35:41,668 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:35:41,668 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:35:41,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:35:41,724 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 01:35:41,725 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397036503] [2019-10-15 01:35:41,725 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:35:41,725 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 01:35:41,726 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567844308] [2019-10-15 01:35:41,728 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:35:41,729 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:35:41,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:35:41,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:35:41,730 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand 3 states. [2019-10-15 01:35:41,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:35:41,769 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2019-10-15 01:35:41,773 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:35:41,774 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2019-10-15 01:35:41,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:35:41,777 INFO L225 Difference]: With dead ends: 30 [2019-10-15 01:35:41,777 INFO L226 Difference]: Without dead ends: 21 [2019-10-15 01:35:41,778 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 01:35:41,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-10-15 01:35:41,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 18. [2019-10-15 01:35:41,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-10-15 01:35:41,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2019-10-15 01:35:41,788 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 13 [2019-10-15 01:35:41,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:35:41,789 INFO L462 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2019-10-15 01:35:41,789 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:35:41,789 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2019-10-15 01:35:41,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-10-15 01:35:41,790 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:35:41,790 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:35:41,791 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:35:41,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:35:41,791 INFO L82 PathProgramCache]: Analyzing trace with hash -1718311367, now seen corresponding path program 1 times [2019-10-15 01:35:41,791 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:35:41,792 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978787814] [2019-10-15 01:35:41,792 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:35:41,792 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:35:41,792 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:35:41,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:35:41,863 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-15 01:35:41,863 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978787814] [2019-10-15 01:35:41,864 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [404212] [2019-10-15 01:35:41,864 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 01:35:41,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:35:41,934 INFO L256 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:35:41,942 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:35:41,998 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-15 01:35:41,998 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:35:42,032 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-15 01:35:42,032 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [942736022] [2019-10-15 01:35:42,060 INFO L162 IcfgInterpreter]: Started Sifa with 13 locations of interest [2019-10-15 01:35:42,060 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:35:42,067 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:35:42,075 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:35:42,076 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:35:42,249 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:35:42,690 WARN L191 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 44 [2019-10-15 01:35:42,827 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 32 for LOIs [2019-10-15 01:35:42,852 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:35:42,867 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:35:43,207 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:35:43,208 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 11] total 18 [2019-10-15 01:35:43,208 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475387409] [2019-10-15 01:35:43,210 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-10-15 01:35:43,210 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:35:43,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-10-15 01:35:43,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2019-10-15 01:35:43,212 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand 18 states. [2019-10-15 01:35:43,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:35:43,990 INFO L93 Difference]: Finished difference Result 50 states and 61 transitions. [2019-10-15 01:35:43,990 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-10-15 01:35:43,990 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-10-15 01:35:43,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:35:43,992 INFO L225 Difference]: With dead ends: 50 [2019-10-15 01:35:43,992 INFO L226 Difference]: Without dead ends: 39 [2019-10-15 01:35:43,993 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=234, Invalid=888, Unknown=0, NotChecked=0, Total=1122 [2019-10-15 01:35:43,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-10-15 01:35:44,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 24. [2019-10-15 01:35:44,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-10-15 01:35:44,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2019-10-15 01:35:44,012 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 14 [2019-10-15 01:35:44,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:35:44,013 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2019-10-15 01:35:44,013 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-10-15 01:35:44,013 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2019-10-15 01:35:44,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-10-15 01:35:44,015 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:35:44,015 INFO L380 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:35:44,218 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:35:44,219 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:35:44,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:35:44,220 INFO L82 PathProgramCache]: Analyzing trace with hash -1363999975, now seen corresponding path program 2 times [2019-10-15 01:35:44,220 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:35:44,221 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096701654] [2019-10-15 01:35:44,221 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:35:44,221 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:35:44,222 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:35:44,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:35:44,299 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-15 01:35:44,299 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096701654] [2019-10-15 01:35:44,300 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626130583] [2019-10-15 01:35:44,300 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 01:35:44,352 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-15 01:35:44,352 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:35:44,353 INFO L256 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-15 01:35:44,355 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:35:44,368 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-15 01:35:44,368 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:35:44,408 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-15 01:35:44,408 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [889108345] [2019-10-15 01:35:44,410 INFO L162 IcfgInterpreter]: Started Sifa with 13 locations of interest [2019-10-15 01:35:44,410 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:35:44,411 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:35:44,411 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:35:44,411 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:35:44,444 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:35:44,771 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 32 for LOIs [2019-10-15 01:35:44,782 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:35:44,788 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:35:45,068 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:35:45,069 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 11] total 21 [2019-10-15 01:35:45,069 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233200944] [2019-10-15 01:35:45,070 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-10-15 01:35:45,070 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:35:45,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-10-15 01:35:45,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=317, Unknown=0, NotChecked=0, Total=420 [2019-10-15 01:35:45,071 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 21 states. [2019-10-15 01:35:46,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:35:46,055 INFO L93 Difference]: Finished difference Result 73 states and 90 transitions. [2019-10-15 01:35:46,055 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-10-15 01:35:46,055 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 20 [2019-10-15 01:35:46,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:35:46,057 INFO L225 Difference]: With dead ends: 73 [2019-10-15 01:35:46,057 INFO L226 Difference]: Without dead ends: 60 [2019-10-15 01:35:46,058 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 512 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=436, Invalid=1456, Unknown=0, NotChecked=0, Total=1892 [2019-10-15 01:35:46,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-10-15 01:35:46,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 32. [2019-10-15 01:35:46,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-10-15 01:35:46,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2019-10-15 01:35:46,069 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 20 [2019-10-15 01:35:46,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:35:46,069 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2019-10-15 01:35:46,069 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-10-15 01:35:46,069 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2019-10-15 01:35:46,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-10-15 01:35:46,070 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:35:46,070 INFO L380 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:35:46,282 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:35:46,283 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:35:46,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:35:46,284 INFO L82 PathProgramCache]: Analyzing trace with hash 311824988, now seen corresponding path program 3 times [2019-10-15 01:35:46,284 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:35:46,285 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370660004] [2019-10-15 01:35:46,285 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:35:46,285 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:35:46,286 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:35:46,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:35:46,472 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-10-15 01:35:46,472 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370660004] [2019-10-15 01:35:46,473 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [33296914] [2019-10-15 01:35:46,473 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 01:35:46,556 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-15 01:35:46,557 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:35:46,561 INFO L256 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-15 01:35:46,566 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:35:46,627 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-10-15 01:35:46,628 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:35:46,782 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-10-15 01:35:46,782 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1818206835] [2019-10-15 01:35:46,783 INFO L162 IcfgInterpreter]: Started Sifa with 13 locations of interest [2019-10-15 01:35:46,784 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:35:46,784 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:35:46,784 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:35:46,785 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:35:46,818 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:35:47,093 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 32 for LOIs [2019-10-15 01:35:47,104 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:35:47,109 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:35:47,754 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:35:47,754 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11, 11] total 37 [2019-10-15 01:35:47,754 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581182458] [2019-10-15 01:35:47,755 INFO L442 AbstractCegarLoop]: Interpolant automaton has 37 states [2019-10-15 01:35:47,756 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:35:47,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2019-10-15 01:35:47,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=428, Invalid=904, Unknown=0, NotChecked=0, Total=1332 [2019-10-15 01:35:47,763 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand 37 states. [2019-10-15 01:35:49,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:35:49,687 INFO L93 Difference]: Finished difference Result 112 states and 146 transitions. [2019-10-15 01:35:49,687 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2019-10-15 01:35:49,688 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 28 [2019-10-15 01:35:49,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:35:49,689 INFO L225 Difference]: With dead ends: 112 [2019-10-15 01:35:49,689 INFO L226 Difference]: Without dead ends: 94 [2019-10-15 01:35:49,693 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2061 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1702, Invalid=4778, Unknown=0, NotChecked=0, Total=6480 [2019-10-15 01:35:49,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2019-10-15 01:35:49,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 52. [2019-10-15 01:35:49,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2019-10-15 01:35:49,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 54 transitions. [2019-10-15 01:35:49,706 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 54 transitions. Word has length 28 [2019-10-15 01:35:49,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:35:49,706 INFO L462 AbstractCegarLoop]: Abstraction has 52 states and 54 transitions. [2019-10-15 01:35:49,706 INFO L463 AbstractCegarLoop]: Interpolant automaton has 37 states. [2019-10-15 01:35:49,706 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 54 transitions. [2019-10-15 01:35:49,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-10-15 01:35:49,708 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:35:49,708 INFO L380 BasicCegarLoop]: trace histogram [24, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:35:49,911 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:35:49,912 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:35:49,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:35:49,912 INFO L82 PathProgramCache]: Analyzing trace with hash -19181412, now seen corresponding path program 4 times [2019-10-15 01:35:49,913 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:35:49,913 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623705354] [2019-10-15 01:35:49,913 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:35:49,914 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:35:49,914 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:35:49,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:35:50,100 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2019-10-15 01:35:50,100 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623705354] [2019-10-15 01:35:50,100 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [381051502] [2019-10-15 01:35:50,101 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 01:35:50,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:35:50,193 INFO L256 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 26 conjunts are in the unsatisfiable core [2019-10-15 01:35:50,197 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:35:50,368 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2019-10-15 01:35:50,368 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:35:50,918 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2019-10-15 01:35:50,919 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2137483408] [2019-10-15 01:35:50,920 INFO L162 IcfgInterpreter]: Started Sifa with 13 locations of interest [2019-10-15 01:35:50,920 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:35:50,921 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:35:50,921 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:35:50,921 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:35:50,951 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:35:51,253 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 32 for LOIs [2019-10-15 01:35:51,279 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:35:51,284 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:35:51,569 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:35:51,569 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 27, 27, 11] total 68 [2019-10-15 01:35:51,570 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375663144] [2019-10-15 01:35:51,571 INFO L442 AbstractCegarLoop]: Interpolant automaton has 68 states [2019-10-15 01:35:51,571 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:35:51,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2019-10-15 01:35:51,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1792, Invalid=2764, Unknown=0, NotChecked=0, Total=4556 [2019-10-15 01:35:51,575 INFO L87 Difference]: Start difference. First operand 52 states and 54 transitions. Second operand 68 states. [2019-10-15 01:35:56,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:35:56,009 INFO L93 Difference]: Finished difference Result 185 states and 249 transitions. [2019-10-15 01:35:56,009 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2019-10-15 01:35:56,009 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 48 [2019-10-15 01:35:56,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:35:56,011 INFO L225 Difference]: With dead ends: 185 [2019-10-15 01:35:56,012 INFO L226 Difference]: Without dead ends: 163 [2019-10-15 01:35:56,018 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7869 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=6850, Invalid=16102, Unknown=0, NotChecked=0, Total=22952 [2019-10-15 01:35:56,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2019-10-15 01:35:56,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 93. [2019-10-15 01:35:56,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2019-10-15 01:35:56,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 95 transitions. [2019-10-15 01:35:56,049 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 95 transitions. Word has length 48 [2019-10-15 01:35:56,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:35:56,049 INFO L462 AbstractCegarLoop]: Abstraction has 93 states and 95 transitions. [2019-10-15 01:35:56,049 INFO L463 AbstractCegarLoop]: Interpolant automaton has 68 states. [2019-10-15 01:35:56,049 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 95 transitions. [2019-10-15 01:35:56,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2019-10-15 01:35:56,052 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:35:56,052 INFO L380 BasicCegarLoop]: trace histogram [55, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:35:56,260 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:35:56,261 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:35:56,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:35:56,262 INFO L82 PathProgramCache]: Analyzing trace with hash 1425033416, now seen corresponding path program 5 times [2019-10-15 01:35:56,263 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:35:56,263 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862745126] [2019-10-15 01:35:56,263 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:35:56,264 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:35:56,264 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:35:56,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:35:56,719 INFO L134 CoverageAnalysis]: Checked inductivity of 1793 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 1540 trivial. 0 not checked. [2019-10-15 01:35:56,719 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862745126] [2019-10-15 01:35:56,720 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1169712146] [2019-10-15 01:35:56,720 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