/usr/bin/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_copyInitSum_ground.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-07 01:23:16,955 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2019-11-07 01:23:16,987 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-07 01:23:16,990 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-07 01:23:16,991 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-07 01:23:16,994 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-07 01:23:16,996 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-07 01:23:16,997 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-07 01:23:16,999 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-07 01:23:17,002 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-07 01:23:17,005 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-07 01:23:17,006 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-07 01:23:17,007 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-07 01:23:17,009 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-07 01:23:17,012 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-07 01:23:17,020 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-07 01:23:17,021 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-07 01:23:17,022 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-07 01:23:17,023 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 [2019-11-07 01:23:17,046 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-07 01:23:17,046 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-07 01:23:17,047 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-07 01:23:17,047 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-07 01:23:17,047 INFO L138 SettingsManager]: * Use SBE=true [2019-11-07 01:23:17,048 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-07 01:23:17,048 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-07 01:23:17,048 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-07 01:23:17,048 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-07 01:23:17,048 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-07 01:23:17,049 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-07 01:23:17,049 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-07 01:23:17,049 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-07 01:23:17,049 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-07 01:23:17,049 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-07 01:23:17,050 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-07 01:23:17,050 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-07 01:23:17,050 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-07 01:23:17,050 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-07 01:23:17,050 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-07 01:23:17,051 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-07 01:23:17,051 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 01:23:17,051 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-07 01:23:17,051 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-07 01:23:17,051 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-07 01:23:17,051 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-07 01:23:17,054 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-07 01:23:17,054 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-07 01:23:17,054 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 [2019-11-07 01:23:17,334 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-07 01:23:17,357 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-07 01:23:17,361 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-07 01:23:17,362 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-07 01:23:17,363 INFO L275 PluginConnector]: CDTParser initialized [2019-11-07 01:23:17,364 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_copyInitSum_ground.i [2019-11-07 01:23:17,441 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a50cece42/01624eb49ce145e5bbff954e02f2d8e6/FLAG702840aa9 [2019-11-07 01:23:17,882 INFO L306 CDTParser]: Found 1 translation units. [2019-11-07 01:23:17,883 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_copyInitSum_ground.i [2019-11-07 01:23:17,890 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a50cece42/01624eb49ce145e5bbff954e02f2d8e6/FLAG702840aa9 [2019-11-07 01:23:18,313 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a50cece42/01624eb49ce145e5bbff954e02f2d8e6 [2019-11-07 01:23:18,339 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-07 01:23:18,345 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-07 01:23:18,350 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-07 01:23:18,350 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-07 01:23:18,360 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-07 01:23:18,361 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:23:18" (1/1) ... [2019-11-07 01:23:18,368 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@26cda43c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:23:18, skipping insertion in model container [2019-11-07 01:23:18,368 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:23:18" (1/1) ... [2019-11-07 01:23:18,390 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-07 01:23:18,437 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-07 01:23:18,737 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 01:23:18,741 INFO L188 MainTranslator]: Completed pre-run [2019-11-07 01:23:18,763 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 01:23:18,781 INFO L192 MainTranslator]: Completed translation [2019-11-07 01:23:18,782 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:23:18 WrapperNode [2019-11-07 01:23:18,782 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-07 01:23:18,783 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-07 01:23:18,783 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-07 01:23:18,783 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-07 01:23:18,869 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:23:18" (1/1) ... [2019-11-07 01:23:18,869 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:23:18" (1/1) ... [2019-11-07 01:23:18,876 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:23:18" (1/1) ... [2019-11-07 01:23:18,876 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:23:18" (1/1) ... [2019-11-07 01:23:18,888 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:23:18" (1/1) ... [2019-11-07 01:23:18,894 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:23:18" (1/1) ... [2019-11-07 01:23:18,896 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:23:18" (1/1) ... [2019-11-07 01:23:18,898 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-07 01:23:18,902 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-07 01:23:18,902 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-07 01:23:18,902 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-07 01:23:18,903 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:23:18" (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 [2019-11-07 01:23:18,958 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-07 01:23:18,958 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-07 01:23:18,959 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-11-07 01:23:18,959 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-07 01:23:18,959 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-07 01:23:18,960 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-07 01:23:18,960 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-11-07 01:23:18,961 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-07 01:23:18,962 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-07 01:23:18,962 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-07 01:23:18,962 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-07 01:23:18,963 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-07 01:23:18,963 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-07 01:23:18,963 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-07 01:23:19,309 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-07 01:23:19,310 INFO L284 CfgBuilder]: Removed 4 assume(true) statements. [2019-11-07 01:23:19,311 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:23:19 BoogieIcfgContainer [2019-11-07 01:23:19,312 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-07 01:23:19,313 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-07 01:23:19,313 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-07 01:23:19,323 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-07 01:23:19,323 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:23:18" (1/3) ... [2019-11-07 01:23:19,324 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33632c98 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:23:19, skipping insertion in model container [2019-11-07 01:23:19,324 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:23:18" (2/3) ... [2019-11-07 01:23:19,327 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33632c98 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:23:19, skipping insertion in model container [2019-11-07 01:23:19,327 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:23:19" (3/3) ... [2019-11-07 01:23:19,336 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_copyInitSum_ground.i [2019-11-07 01:23:19,346 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-07 01:23:19,357 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-07 01:23:19,371 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-07 01:23:19,393 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-07 01:23:19,393 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-07 01:23:19,393 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-07 01:23:19,394 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-07 01:23:19,394 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-07 01:23:19,394 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-07 01:23:19,394 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-07 01:23:19,395 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-07 01:23:19,417 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2019-11-07 01:23:19,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-11-07 01:23:19,423 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:23:19,424 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:23:19,426 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:23:19,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:23:19,431 INFO L82 PathProgramCache]: Analyzing trace with hash -1077091250, now seen corresponding path program 1 times [2019-11-07 01:23:19,439 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:23:19,440 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675458797] [2019-11-07 01:23:19,440 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:23:19,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:23:19,614 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:23:19,614 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675458797] [2019-11-07 01:23:19,615 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 01:23:19,616 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-07 01:23:19,617 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939568838] [2019-11-07 01:23:19,622 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 01:23:19,622 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:23:19,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 01:23:19,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 01:23:19,644 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 3 states. [2019-11-07 01:23:19,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:23:19,720 INFO L93 Difference]: Finished difference Result 37 states and 48 transitions. [2019-11-07 01:23:19,722 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 01:23:19,724 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2019-11-07 01:23:19,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:23:19,736 INFO L225 Difference]: With dead ends: 37 [2019-11-07 01:23:19,736 INFO L226 Difference]: Without dead ends: 20 [2019-11-07 01:23:19,742 INFO L630 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 [2019-11-07 01:23:19,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-11-07 01:23:19,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2019-11-07 01:23:19,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-11-07 01:23:19,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2019-11-07 01:23:19,799 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 13 [2019-11-07 01:23:19,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:23:19,801 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2019-11-07 01:23:19,801 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 01:23:19,801 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2019-11-07 01:23:19,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-07 01:23:19,803 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:23:19,803 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:23:19,804 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:23:19,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:23:19,805 INFO L82 PathProgramCache]: Analyzing trace with hash -757612113, now seen corresponding path program 1 times [2019-11-07 01:23:19,805 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:23:19,806 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014458330] [2019-11-07 01:23:19,806 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:23:19,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:23:19,965 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-07 01:23:19,965 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014458330] [2019-11-07 01:23:19,965 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [883164914] [2019-11-07 01:23:19,966 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 [2019-11-07 01:23:20,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:23:20,025 INFO L256 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 01:23:20,032 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:23:20,064 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-07 01:23:20,065 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:23:20,097 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-07 01:23:20,097 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1453499082] [2019-11-07 01:23:20,145 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2019-11-07 01:23:20,146 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:23:20,156 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:23:20,166 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:23:20,167 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:23:20,291 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 01:23:20,869 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 38 for LOIs [2019-11-07 01:23:20,877 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 01:23:20,880 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:23:21,325 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 01:23:21,325 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 10] total 17 [2019-11-07 01:23:21,328 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248937097] [2019-11-07 01:23:21,330 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-11-07 01:23:21,331 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:23:21,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-11-07 01:23:21,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2019-11-07 01:23:21,335 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand 17 states. [2019-11-07 01:23:22,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:23:22,303 INFO L93 Difference]: Finished difference Result 51 states and 65 transitions. [2019-11-07 01:23:22,303 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-07 01:23:22,303 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 16 [2019-11-07 01:23:22,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:23:22,305 INFO L225 Difference]: With dead ends: 51 [2019-11-07 01:23:22,305 INFO L226 Difference]: Without dead ends: 38 [2019-11-07 01:23:22,306 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=141, Invalid=615, Unknown=0, NotChecked=0, Total=756 [2019-11-07 01:23:22,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-11-07 01:23:22,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 29. [2019-11-07 01:23:22,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-11-07 01:23:22,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2019-11-07 01:23:22,321 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 16 [2019-11-07 01:23:22,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:23:22,323 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2019-11-07 01:23:22,323 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-11-07 01:23:22,324 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2019-11-07 01:23:22,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-11-07 01:23:22,328 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:23:22,329 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:23:22,533 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:23:22,534 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:23:22,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:23:22,534 INFO L82 PathProgramCache]: Analyzing trace with hash 1901072654, now seen corresponding path program 2 times [2019-11-07 01:23:22,537 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:23:22,541 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524114572] [2019-11-07 01:23:22,541 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:23:22,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:23:22,752 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-11-07 01:23:22,752 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524114572] [2019-11-07 01:23:22,753 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471157660] [2019-11-07 01:23:22,753 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 [2019-11-07 01:23:22,819 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-07 01:23:22,820 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-07 01:23:22,821 INFO L256 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-07 01:23:22,824 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:23:22,835 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-11-07 01:23:22,835 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:23:22,894 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-11-07 01:23:22,895 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1755541087] [2019-11-07 01:23:22,896 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2019-11-07 01:23:22,896 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:23:22,897 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:23:22,897 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:23:22,897 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:23:22,927 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 01:23:23,344 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 38 for LOIs [2019-11-07 01:23:23,353 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 01:23:23,355 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:23:23,775 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 01:23:23,776 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 10] total 23 [2019-11-07 01:23:23,776 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865214516] [2019-11-07 01:23:23,777 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-11-07 01:23:23,777 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:23:23,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-11-07 01:23:23,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=399, Unknown=0, NotChecked=0, Total=506 [2019-11-07 01:23:23,778 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand 23 states. [2019-11-07 01:23:25,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:23:25,143 INFO L93 Difference]: Finished difference Result 75 states and 98 transitions. [2019-11-07 01:23:25,145 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-11-07 01:23:25,145 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 25 [2019-11-07 01:23:25,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:23:25,149 INFO L225 Difference]: With dead ends: 75 [2019-11-07 01:23:25,149 INFO L226 Difference]: Without dead ends: 56 [2019-11-07 01:23:25,151 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 404 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=312, Invalid=1248, Unknown=0, NotChecked=0, Total=1560 [2019-11-07 01:23:25,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2019-11-07 01:23:25,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 47. [2019-11-07 01:23:25,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-11-07 01:23:25,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 50 transitions. [2019-11-07 01:23:25,174 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 50 transitions. Word has length 25 [2019-11-07 01:23:25,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:23:25,177 INFO L462 AbstractCegarLoop]: Abstraction has 47 states and 50 transitions. [2019-11-07 01:23:25,177 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-11-07 01:23:25,177 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 50 transitions. [2019-11-07 01:23:25,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2019-11-07 01:23:25,178 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:23:25,178 INFO L410 BasicCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:23:25,385 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:23:25,385 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:23:25,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:23:25,386 INFO L82 PathProgramCache]: Analyzing trace with hash -1385871314, now seen corresponding path program 3 times [2019-11-07 01:23:25,386 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:23:25,386 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097770549] [2019-11-07 01:23:25,386 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:23:25,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:23:25,549 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2019-11-07 01:23:25,549 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097770549] [2019-11-07 01:23:25,550 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [686763509] [2019-11-07 01:23:25,550 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 [2019-11-07 01:23:25,621 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-07 01:23:25,622 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-07 01:23:25,623 INFO L256 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-07 01:23:25,627 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:23:25,643 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2019-11-07 01:23:25,643 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:23:25,942 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2019-11-07 01:23:25,942 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [82106482] [2019-11-07 01:23:25,944 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2019-11-07 01:23:25,944 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:23:25,945 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:23:25,945 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:23:25,945 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:23:25,965 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 01:23:26,300 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 38 for LOIs [2019-11-07 01:23:26,308 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 01:23:26,310 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:23:26,795 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 01:23:26,795 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13, 10] total 35 [2019-11-07 01:23:26,797 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965318617] [2019-11-07 01:23:26,797 INFO L442 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-11-07 01:23:26,798 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:23:26,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-11-07 01:23:26,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=329, Invalid=861, Unknown=0, NotChecked=0, Total=1190 [2019-11-07 01:23:26,799 INFO L87 Difference]: Start difference. First operand 47 states and 50 transitions. Second operand 35 states. [2019-11-07 01:23:29,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:23:29,472 INFO L93 Difference]: Finished difference Result 123 states and 164 transitions. [2019-11-07 01:23:29,473 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-11-07 01:23:29,473 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 43 [2019-11-07 01:23:29,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:23:29,476 INFO L225 Difference]: With dead ends: 123 [2019-11-07 01:23:29,477 INFO L226 Difference]: Without dead ends: 92 [2019-11-07 01:23:29,480 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1007 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=978, Invalid=3054, Unknown=0, NotChecked=0, Total=4032 [2019-11-07 01:23:29,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2019-11-07 01:23:29,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 83. [2019-11-07 01:23:29,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-11-07 01:23:29,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 86 transitions. [2019-11-07 01:23:29,508 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 86 transitions. Word has length 43 [2019-11-07 01:23:29,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:23:29,508 INFO L462 AbstractCegarLoop]: Abstraction has 83 states and 86 transitions. [2019-11-07 01:23:29,508 INFO L463 AbstractCegarLoop]: Interpolant automaton has 35 states. [2019-11-07 01:23:29,509 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 86 transitions. [2019-11-07 01:23:29,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2019-11-07 01:23:29,514 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:23:29,514 INFO L410 BasicCegarLoop]: trace histogram [22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:23:29,718 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:23:29,718 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:23:29,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:23:29,722 INFO L82 PathProgramCache]: Analyzing trace with hash -199901586, now seen corresponding path program 4 times [2019-11-07 01:23:29,728 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:23:29,729 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975008698] [2019-11-07 01:23:29,729 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:23:29,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:23:30,263 INFO L134 CoverageAnalysis]: Checked inductivity of 759 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 506 trivial. 0 not checked. [2019-11-07 01:23:30,263 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975008698] [2019-11-07 01:23:30,264 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975970704] [2019-11-07 01:23:30,264 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 [2019-11-07 01:23:30,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:23:30,366 INFO L256 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 24 conjunts are in the unsatisfiable core [2019-11-07 01:23:30,372 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:23:30,398 INFO L134 CoverageAnalysis]: Checked inductivity of 759 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 506 trivial. 0 not checked. [2019-11-07 01:23:30,399 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:23:31,098 INFO L134 CoverageAnalysis]: Checked inductivity of 759 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 506 trivial. 0 not checked. [2019-11-07 01:23:31,099 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [208090392] [2019-11-07 01:23:31,100 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2019-11-07 01:23:31,101 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:23:31,101 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:23:31,101 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:23:31,102 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:23:31,118 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 01:23:31,397 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 38 for LOIs [2019-11-07 01:23:31,405 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 01:23:31,408 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:23:31,911 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 01:23:31,911 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25, 10] total 59 [2019-11-07 01:23:31,912 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191250947] [2019-11-07 01:23:31,912 INFO L442 AbstractCegarLoop]: Interpolant automaton has 59 states [2019-11-07 01:23:31,913 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:23:31,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2019-11-07 01:23:31,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1205, Invalid=2217, Unknown=0, NotChecked=0, Total=3422 [2019-11-07 01:23:31,916 INFO L87 Difference]: Start difference. First operand 83 states and 86 transitions. Second operand 59 states. [2019-11-07 01:23:37,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:23:37,732 INFO L93 Difference]: Finished difference Result 219 states and 296 transitions. [2019-11-07 01:23:37,732 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2019-11-07 01:23:37,732 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 79 [2019-11-07 01:23:37,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:23:37,735 INFO L225 Difference]: With dead ends: 219 [2019-11-07 01:23:37,736 INFO L226 Difference]: Without dead ends: 164 [2019-11-07 01:23:37,740 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 205 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2753 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=3606, Invalid=8826, Unknown=0, NotChecked=0, Total=12432 [2019-11-07 01:23:37,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2019-11-07 01:23:37,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 155. [2019-11-07 01:23:37,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2019-11-07 01:23:37,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 158 transitions. [2019-11-07 01:23:37,766 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 158 transitions. Word has length 79 [2019-11-07 01:23:37,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:23:37,767 INFO L462 AbstractCegarLoop]: Abstraction has 155 states and 158 transitions. [2019-11-07 01:23:37,767 INFO L463 AbstractCegarLoop]: Interpolant automaton has 59 states. [2019-11-07 01:23:37,767 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 158 transitions. [2019-11-07 01:23:37,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2019-11-07 01:23:37,770 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:23:37,770 INFO L410 BasicCegarLoop]: trace histogram [46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:23:37,979 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:23:37,979 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:23:37,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:23:37,981 INFO L82 PathProgramCache]: Analyzing trace with hash -1424569618, now seen corresponding path program 5 times [2019-11-07 01:23:37,981 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:23:37,981 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940069878] [2019-11-07 01:23:37,982 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:23:38,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:23:39,377 INFO L134 CoverageAnalysis]: Checked inductivity of 3243 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 2162 trivial. 0 not checked. [2019-11-07 01:23:39,377 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940069878] [2019-11-07 01:23:39,377 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308718132] [2019-11-07 01:23:39,377 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