/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_copy2_ground-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-07 01:21:37,020 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-07 01:21:37,022 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-07 01:21:37,041 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-07 01:21:37,065 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-07 01:21:37,070 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-07 01:21:37,072 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-07 01:21:37,073 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-07 01:21:37,073 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-07 01:21:37,076 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-07 01:21:37,077 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-07 01:21:37,079 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-07 01:21:37,080 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-07 01:21:37,081 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-07 01:21:37,082 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-07 01:21:37,083 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-07 01:21:37,085 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-07 01:21:37,092 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-07 01:21:37,093 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-07 01:21:37,094 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-07 01:21:37,095 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 01:21:37,118 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-07 01:21:37,119 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-07 01:21:37,121 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-07 01:21:37,121 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-07 01:21:37,121 INFO L138 SettingsManager]: * Use SBE=true [2019-11-07 01:21:37,121 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-07 01:21:37,122 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-07 01:21:37,122 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-07 01:21:37,122 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-07 01:21:37,122 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-07 01:21:37,123 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-07 01:21:37,123 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-07 01:21:37,124 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-07 01:21:37,124 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-07 01:21:37,124 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-07 01:21:37,124 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-07 01:21:37,125 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-07 01:21:37,125 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-07 01:21:37,125 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-07 01:21:37,125 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-07 01:21:37,126 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-07 01:21:37,126 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 01:21:37,126 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-07 01:21:37,126 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-07 01:21:37,127 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-07 01:21:37,127 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-07 01:21:37,127 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-07 01:21:37,127 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-07 01:21:37,127 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 01:21:37,395 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-07 01:21:37,418 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-07 01:21:37,422 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-07 01:21:37,423 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-07 01:21:37,423 INFO L275 PluginConnector]: CDTParser initialized [2019-11-07 01:21:37,424 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_copy2_ground-2.i [2019-11-07 01:21:37,497 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e40707dd6/528dfe7036604e4896030777efc050ea/FLAG6ac817dbc [2019-11-07 01:21:37,960 INFO L306 CDTParser]: Found 1 translation units. [2019-11-07 01:21:37,962 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_copy2_ground-2.i [2019-11-07 01:21:37,969 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e40707dd6/528dfe7036604e4896030777efc050ea/FLAG6ac817dbc [2019-11-07 01:21:38,354 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e40707dd6/528dfe7036604e4896030777efc050ea [2019-11-07 01:21:38,372 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-07 01:21:38,379 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-07 01:21:38,388 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-07 01:21:38,389 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-07 01:21:38,395 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-07 01:21:38,396 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:21:38" (1/1) ... [2019-11-07 01:21:38,399 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5487e775 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:21:38, skipping insertion in model container [2019-11-07 01:21:38,400 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:21:38" (1/1) ... [2019-11-07 01:21:38,413 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-07 01:21:38,436 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-07 01:21:38,715 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 01:21:38,719 INFO L188 MainTranslator]: Completed pre-run [2019-11-07 01:21:38,739 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 01:21:38,756 INFO L192 MainTranslator]: Completed translation [2019-11-07 01:21:38,757 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:21:38 WrapperNode [2019-11-07 01:21:38,757 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-07 01:21:38,757 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-07 01:21:38,758 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-07 01:21:38,758 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-07 01:21:38,842 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:21:38" (1/1) ... [2019-11-07 01:21:38,842 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:21:38" (1/1) ... [2019-11-07 01:21:38,849 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:21:38" (1/1) ... [2019-11-07 01:21:38,849 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:21:38" (1/1) ... [2019-11-07 01:21:38,857 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:21:38" (1/1) ... [2019-11-07 01:21:38,867 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:21:38" (1/1) ... [2019-11-07 01:21:38,868 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:21:38" (1/1) ... [2019-11-07 01:21:38,870 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-07 01:21:38,871 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-07 01:21:38,871 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-07 01:21:38,871 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-07 01:21:38,874 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:21:38" (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 01:21:38,935 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-07 01:21:38,935 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-07 01:21:38,936 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-11-07 01:21:38,936 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-07 01:21:38,936 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-07 01:21:38,936 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-11-07 01:21:38,936 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-07 01:21:38,936 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-07 01:21:38,937 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-07 01:21:38,937 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-07 01:21:38,937 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-07 01:21:38,937 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-07 01:21:38,937 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-07 01:21:38,937 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-07 01:21:39,344 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-07 01:21:39,345 INFO L284 CfgBuilder]: Removed 4 assume(true) statements. [2019-11-07 01:21:39,346 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:21:39 BoogieIcfgContainer [2019-11-07 01:21:39,346 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-07 01:21:39,347 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-07 01:21:39,348 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-07 01:21:39,351 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-07 01:21:39,351 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:21:38" (1/3) ... [2019-11-07 01:21:39,352 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@573a9b50 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:21:39, skipping insertion in model container [2019-11-07 01:21:39,352 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:21:38" (2/3) ... [2019-11-07 01:21:39,352 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@573a9b50 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:21:39, skipping insertion in model container [2019-11-07 01:21:39,353 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:21:39" (3/3) ... [2019-11-07 01:21:39,354 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_copy2_ground-2.i [2019-11-07 01:21:39,362 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-07 01:21:39,368 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-07 01:21:39,377 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-07 01:21:39,397 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-07 01:21:39,398 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-07 01:21:39,398 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-07 01:21:39,398 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-07 01:21:39,398 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-07 01:21:39,398 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-07 01:21:39,398 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-07 01:21:39,398 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-07 01:21:39,413 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2019-11-07 01:21:39,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-11-07 01:21:39,418 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:21:39,419 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:21:39,420 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:21:39,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:21:39,426 INFO L82 PathProgramCache]: Analyzing trace with hash -1272573714, now seen corresponding path program 1 times [2019-11-07 01:21:39,434 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:21:39,435 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22985188] [2019-11-07 01:21:39,435 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:21:39,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:21:39,595 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 01:21:39,595 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22985188] [2019-11-07 01:21:39,596 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 01:21:39,597 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-07 01:21:39,598 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35172323] [2019-11-07 01:21:39,603 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 01:21:39,603 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:21:39,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 01:21:39,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 01:21:39,622 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 3 states. [2019-11-07 01:21:39,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:21:39,671 INFO L93 Difference]: Finished difference Result 35 states and 44 transitions. [2019-11-07 01:21:39,672 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 01:21:39,673 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2019-11-07 01:21:39,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:21:39,682 INFO L225 Difference]: With dead ends: 35 [2019-11-07 01:21:39,682 INFO L226 Difference]: Without dead ends: 18 [2019-11-07 01:21:39,686 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 01:21:39,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2019-11-07 01:21:39,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2019-11-07 01:21:39,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-11-07 01:21:39,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2019-11-07 01:21:39,721 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 13 [2019-11-07 01:21:39,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:21:39,722 INFO L462 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2019-11-07 01:21:39,722 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 01:21:39,723 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2019-11-07 01:21:39,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-07 01:21:39,723 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:21:39,724 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:21:39,724 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:21:39,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:21:39,725 INFO L82 PathProgramCache]: Analyzing trace with hash -1861910933, now seen corresponding path program 1 times [2019-11-07 01:21:39,725 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:21:39,726 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964427016] [2019-11-07 01:21:39,726 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:21:39,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:21:39,775 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-07 01:21:39,776 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964427016] [2019-11-07 01:21:39,777 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 01:21:39,777 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-07 01:21:39,777 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556584344] [2019-11-07 01:21:39,779 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 01:21:39,779 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:21:39,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 01:21:39,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 01:21:39,780 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand 3 states. [2019-11-07 01:21:39,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:21:39,805 INFO L93 Difference]: Finished difference Result 30 states and 36 transitions. [2019-11-07 01:21:39,805 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 01:21:39,806 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 14 [2019-11-07 01:21:39,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:21:39,807 INFO L225 Difference]: With dead ends: 30 [2019-11-07 01:21:39,807 INFO L226 Difference]: Without dead ends: 20 [2019-11-07 01:21:39,808 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 01:21:39,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-11-07 01:21:39,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2019-11-07 01:21:39,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-11-07 01:21:39,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2019-11-07 01:21:39,814 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 14 [2019-11-07 01:21:39,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:21:39,815 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2019-11-07 01:21:39,815 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 01:21:39,815 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2019-11-07 01:21:39,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-07 01:21:39,816 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:21:39,816 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:21:39,816 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:21:39,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:21:39,817 INFO L82 PathProgramCache]: Analyzing trace with hash 728822389, now seen corresponding path program 1 times [2019-11-07 01:21:39,817 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:21:39,818 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864161] [2019-11-07 01:21:39,818 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:21:39,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:21:39,907 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 01:21:39,907 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864161] [2019-11-07 01:21:39,908 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1099503007] [2019-11-07 01:21:39,908 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 01:21:39,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:21:39,986 INFO L256 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 01:21:39,992 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:21:40,049 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 01:21:40,049 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:21:40,087 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 01:21:40,087 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [205627020] [2019-11-07 01:21:40,113 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2019-11-07 01:21:40,114 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:21:40,120 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:21:40,127 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:21:40,128 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:21:40,286 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 01:21:40,669 WARN L191 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 38 [2019-11-07 01:21:41,034 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 29 for LOIs [2019-11-07 01:21:41,045 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 01:21:41,049 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:21:41,337 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 01:21:41,337 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 11] total 18 [2019-11-07 01:21:41,338 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132035650] [2019-11-07 01:21:41,346 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-11-07 01:21:41,346 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:21:41,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-11-07 01:21:41,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2019-11-07 01:21:41,350 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand 18 states. [2019-11-07 01:21:42,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:21:42,008 INFO L93 Difference]: Finished difference Result 47 states and 57 transitions. [2019-11-07 01:21:42,009 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-11-07 01:21:42,009 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 16 [2019-11-07 01:21:42,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:21:42,010 INFO L225 Difference]: With dead ends: 47 [2019-11-07 01:21:42,010 INFO L226 Difference]: Without dead ends: 34 [2019-11-07 01:21:42,012 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=145, Invalid=785, Unknown=0, NotChecked=0, Total=930 [2019-11-07 01:21:42,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-11-07 01:21:42,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 25. [2019-11-07 01:21:42,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-11-07 01:21:42,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2019-11-07 01:21:42,019 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 16 [2019-11-07 01:21:42,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:21:42,020 INFO L462 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2019-11-07 01:21:42,020 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-11-07 01:21:42,020 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2019-11-07 01:21:42,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-11-07 01:21:42,021 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:21:42,021 INFO L410 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:21:42,225 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:21:42,225 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:21:42,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:21:42,226 INFO L82 PathProgramCache]: Analyzing trace with hash 1554625518, now seen corresponding path program 2 times [2019-11-07 01:21:42,226 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:21:42,230 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489149289] [2019-11-07 01:21:42,230 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:21:42,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:21:42,390 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-07 01:21:42,391 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489149289] [2019-11-07 01:21:42,391 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1132207904] [2019-11-07 01:21:42,391 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 01:21:42,441 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-11-07 01:21:42,442 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-07 01:21:42,443 INFO L256 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-07 01:21:42,444 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:21:42,473 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-11-07 01:21:42,473 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:21:42,510 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-11-07 01:21:42,511 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [368756877] [2019-11-07 01:21:42,512 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2019-11-07 01:21:42,513 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:21:42,513 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:21:42,513 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:21:42,514 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:21:42,540 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 01:21:43,097 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 29 for LOIs [2019-11-07 01:21:43,105 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 01:21:43,107 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:21:43,718 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 01:21:43,718 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5, 11] total 23 [2019-11-07 01:21:43,719 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055003521] [2019-11-07 01:21:43,720 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-11-07 01:21:43,720 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:21:43,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-11-07 01:21:43,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2019-11-07 01:21:43,724 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand 23 states. [2019-11-07 01:21:44,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:21:44,591 INFO L93 Difference]: Finished difference Result 58 states and 72 transitions. [2019-11-07 01:21:44,592 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-11-07 01:21:44,592 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 21 [2019-11-07 01:21:44,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:21:44,593 INFO L225 Difference]: With dead ends: 58 [2019-11-07 01:21:44,594 INFO L226 Difference]: Without dead ends: 43 [2019-11-07 01:21:44,595 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 373 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=237, Invalid=1403, Unknown=0, NotChecked=0, Total=1640 [2019-11-07 01:21:44,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-11-07 01:21:44,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 34. [2019-11-07 01:21:44,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-11-07 01:21:44,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions. [2019-11-07 01:21:44,604 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 21 [2019-11-07 01:21:44,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:21:44,605 INFO L462 AbstractCegarLoop]: Abstraction has 34 states and 37 transitions. [2019-11-07 01:21:44,605 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-11-07 01:21:44,605 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2019-11-07 01:21:44,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-11-07 01:21:44,606 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:21:44,606 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:21:44,810 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:21:44,810 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:21:44,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:21:44,811 INFO L82 PathProgramCache]: Analyzing trace with hash -149803285, now seen corresponding path program 3 times [2019-11-07 01:21:44,811 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:21:44,811 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374889038] [2019-11-07 01:21:44,811 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:21:44,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:21:44,942 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-11-07 01:21:44,942 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374889038] [2019-11-07 01:21:44,942 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229530447] [2019-11-07 01:21:44,942 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 01:21:45,018 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-07 01:21:45,018 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-07 01:21:45,019 INFO L256 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-07 01:21:45,024 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:21:45,081 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2019-11-07 01:21:45,082 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:21:45,184 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2019-11-07 01:21:45,184 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [323215711] [2019-11-07 01:21:45,185 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2019-11-07 01:21:45,186 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:21:45,187 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:21:45,187 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:21:45,188 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:21:45,215 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 01:21:45,700 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 29 for LOIs [2019-11-07 01:21:45,706 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 01:21:45,708 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:21:45,996 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 01:21:45,996 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8, 11] total 31 [2019-11-07 01:21:45,996 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994038516] [2019-11-07 01:21:45,997 INFO L442 AbstractCegarLoop]: Interpolant automaton has 31 states [2019-11-07 01:21:45,997 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:21:45,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2019-11-07 01:21:45,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=775, Unknown=0, NotChecked=0, Total=930 [2019-11-07 01:21:45,999 INFO L87 Difference]: Start difference. First operand 34 states and 37 transitions. Second operand 31 states. [2019-11-07 01:21:47,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:21:47,171 INFO L93 Difference]: Finished difference Result 75 states and 89 transitions. [2019-11-07 01:21:47,172 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-11-07 01:21:47,172 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 30 [2019-11-07 01:21:47,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:21:47,174 INFO L225 Difference]: With dead ends: 75 [2019-11-07 01:21:47,174 INFO L226 Difference]: Without dead ends: 52 [2019-11-07 01:21:47,176 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 789 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=473, Invalid=2719, Unknown=0, NotChecked=0, Total=3192 [2019-11-07 01:21:47,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2019-11-07 01:21:47,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 43. [2019-11-07 01:21:47,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2019-11-07 01:21:47,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 46 transitions. [2019-11-07 01:21:47,185 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 46 transitions. Word has length 30 [2019-11-07 01:21:47,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:21:47,185 INFO L462 AbstractCegarLoop]: Abstraction has 43 states and 46 transitions. [2019-11-07 01:21:47,185 INFO L463 AbstractCegarLoop]: Interpolant automaton has 31 states. [2019-11-07 01:21:47,185 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 46 transitions. [2019-11-07 01:21:47,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-11-07 01:21:47,186 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:21:47,187 INFO L410 BasicCegarLoop]: trace histogram [12, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:21:47,391 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:21:47,392 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:21:47,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:21:47,392 INFO L82 PathProgramCache]: Analyzing trace with hash -1025373768, now seen corresponding path program 4 times [2019-11-07 01:21:47,393 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:21:47,393 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898365856] [2019-11-07 01:21:47,394 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:21:47,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:21:47,535 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2019-11-07 01:21:47,536 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898365856] [2019-11-07 01:21:47,536 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [963538319] [2019-11-07 01:21:47,536 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 01:21:47,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:21:47,627 INFO L256 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-07 01:21:47,629 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:21:47,792 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2019-11-07 01:21:47,792 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:21:48,100 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2019-11-07 01:21:48,101 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [603873639] [2019-11-07 01:21:48,102 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2019-11-07 01:21:48,103 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:21:48,103 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:21:48,103 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:21:48,103 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:21:48,122 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 01:21:48,610 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 29 for LOIs [2019-11-07 01:21:48,619 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 01:21:48,624 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:21:49,042 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 01:21:49,043 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15, 15, 11] total 46 [2019-11-07 01:21:49,043 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108476477] [2019-11-07 01:21:49,045 INFO L442 AbstractCegarLoop]: Interpolant automaton has 46 states [2019-11-07 01:21:49,045 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:21:49,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2019-11-07 01:21:49,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=451, Invalid=1619, Unknown=0, NotChecked=0, Total=2070 [2019-11-07 01:21:49,046 INFO L87 Difference]: Start difference. First operand 43 states and 46 transitions. Second operand 46 states. [2019-11-07 01:21:50,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:21:50,991 INFO L93 Difference]: Finished difference Result 93 states and 114 transitions. [2019-11-07 01:21:50,992 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2019-11-07 01:21:50,992 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 39 [2019-11-07 01:21:50,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:21:50,994 INFO L225 Difference]: With dead ends: 93 [2019-11-07 01:21:50,994 INFO L226 Difference]: Without dead ends: 68 [2019-11-07 01:21:50,996 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1839 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1363, Invalid=6119, Unknown=0, NotChecked=0, Total=7482 [2019-11-07 01:21:50,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2019-11-07 01:21:51,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 59. [2019-11-07 01:21:51,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2019-11-07 01:21:51,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 62 transitions. [2019-11-07 01:21:51,007 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 62 transitions. Word has length 39 [2019-11-07 01:21:51,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:21:51,007 INFO L462 AbstractCegarLoop]: Abstraction has 59 states and 62 transitions. [2019-11-07 01:21:51,008 INFO L463 AbstractCegarLoop]: Interpolant automaton has 46 states. [2019-11-07 01:21:51,008 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 62 transitions. [2019-11-07 01:21:51,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2019-11-07 01:21:51,009 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:21:51,009 INFO L410 BasicCegarLoop]: trace histogram [26, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:21:51,212 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:21:51,213 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:21:51,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:21:51,213 INFO L82 PathProgramCache]: Analyzing trace with hash -738862322, now seen corresponding path program 5 times [2019-11-07 01:21:51,214 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:21:51,214 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562797394] [2019-11-07 01:21:51,214 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:21:51,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:21:51,708 INFO L134 CoverageAnalysis]: Checked inductivity of 423 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2019-11-07 01:21:51,709 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562797394] [2019-11-07 01:21:51,709 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481070679] [2019-11-07 01:21:51,709 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:21:52,120 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-11-07 01:21:52,120 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-07 01:21:52,122 INFO L256 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-07 01:21:52,125 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:21:52,326 INFO L134 CoverageAnalysis]: Checked inductivity of 423 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 387 trivial. 0 not checked. [2019-11-07 01:21:52,327 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:21:52,599 INFO L134 CoverageAnalysis]: Checked inductivity of 423 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 387 trivial. 0 not checked. [2019-11-07 01:21:52,600 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [39359043] [2019-11-07 01:21:52,605 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2019-11-07 01:21:52,605 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:21:52,605 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:21:52,606 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:21:52,606 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:21:52,625 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 01:21:53,058 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 29 for LOIs [2019-11-07 01:21:53,063 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 01:21:53,065 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:21:53,501 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 01:21:53,502 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 11, 11, 11] total 57 [2019-11-07 01:21:53,502 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383507338] [2019-11-07 01:21:53,504 INFO L442 AbstractCegarLoop]: Interpolant automaton has 57 states [2019-11-07 01:21:53,507 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:21:53,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2019-11-07 01:21:53,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=624, Invalid=2568, Unknown=0, NotChecked=0, Total=3192 [2019-11-07 01:21:53,509 INFO L87 Difference]: Start difference. First operand 59 states and 62 transitions. Second operand 57 states. [2019-11-07 01:21:56,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:21:56,401 INFO L93 Difference]: Finished difference Result 116 states and 142 transitions. [2019-11-07 01:21:56,402 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2019-11-07 01:21:56,402 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 55 [2019-11-07 01:21:56,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:21:56,403 INFO L225 Difference]: With dead ends: 116 [2019-11-07 01:21:56,404 INFO L226 Difference]: Without dead ends: 89 [2019-11-07 01:21:56,408 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2789 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=1902, Invalid=9870, Unknown=0, NotChecked=0, Total=11772 [2019-11-07 01:21:56,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2019-11-07 01:21:56,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 80. [2019-11-07 01:21:56,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2019-11-07 01:21:56,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 83 transitions. [2019-11-07 01:21:56,421 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 83 transitions. Word has length 55 [2019-11-07 01:21:56,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:21:56,421 INFO L462 AbstractCegarLoop]: Abstraction has 80 states and 83 transitions. [2019-11-07 01:21:56,422 INFO L463 AbstractCegarLoop]: Interpolant automaton has 57 states. [2019-11-07 01:21:56,422 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 83 transitions. [2019-11-07 01:21:56,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2019-11-07 01:21:56,424 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:21:56,424 INFO L410 BasicCegarLoop]: trace histogram [27, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:21:56,635 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:21:56,636 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:21:56,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:21:56,637 INFO L82 PathProgramCache]: Analyzing trace with hash -1722620277, now seen corresponding path program 6 times [2019-11-07 01:21:56,637 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:21:56,637 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527011261] [2019-11-07 01:21:56,637 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:21:56,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:21:56,964 INFO L134 CoverageAnalysis]: Checked inductivity of 720 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 549 trivial. 0 not checked. [2019-11-07 01:21:56,964 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527011261] [2019-11-07 01:21:56,964 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1118009705] [2019-11-07 01:21:56,965 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:21:57,077 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-07 01:21:57,077 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-07 01:21:57,079 INFO L256 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 29 conjunts are in the unsatisfiable core [2019-11-07 01:21:57,085 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:21:57,645 INFO L134 CoverageAnalysis]: Checked inductivity of 720 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 342 trivial. 0 not checked. [2019-11-07 01:21:57,645 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:21:58,800 INFO L134 CoverageAnalysis]: Checked inductivity of 720 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 342 trivial. 0 not checked. [2019-11-07 01:21:58,800 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1090878201] [2019-11-07 01:21:58,801 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2019-11-07 01:21:58,801 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:21:58,802 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:21:58,802 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:21:58,802 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:21:58,818 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 01:21:59,261 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 29 for LOIs [2019-11-07 01:21:59,266 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 01:21:59,271 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:21:59,742 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 01:21:59,742 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 30, 30, 11] total 87 [2019-11-07 01:21:59,742 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755203424] [2019-11-07 01:21:59,744 INFO L442 AbstractCegarLoop]: Interpolant automaton has 87 states [2019-11-07 01:21:59,744 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:21:59,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2019-11-07 01:21:59,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1891, Invalid=5591, Unknown=0, NotChecked=0, Total=7482 [2019-11-07 01:21:59,747 INFO L87 Difference]: Start difference. First operand 80 states and 83 transitions. Second operand 87 states. [2019-11-07 01:22:04,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:22:04,847 INFO L93 Difference]: Finished difference Result 167 states and 203 transitions. [2019-11-07 01:22:04,847 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2019-11-07 01:22:04,848 INFO L78 Accepts]: Start accepts. Automaton has 87 states. Word has length 76 [2019-11-07 01:22:04,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:22:04,849 INFO L225 Difference]: With dead ends: 167 [2019-11-07 01:22:04,850 INFO L226 Difference]: Without dead ends: 120 [2019-11-07 01:22:04,856 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6686 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=5705, Invalid=22687, Unknown=0, NotChecked=0, Total=28392 [2019-11-07 01:22:04,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2019-11-07 01:22:04,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 111. [2019-11-07 01:22:04,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2019-11-07 01:22:04,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 114 transitions. [2019-11-07 01:22:04,871 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 114 transitions. Word has length 76 [2019-11-07 01:22:04,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:22:04,871 INFO L462 AbstractCegarLoop]: Abstraction has 111 states and 114 transitions. [2019-11-07 01:22:04,871 INFO L463 AbstractCegarLoop]: Interpolant automaton has 87 states. [2019-11-07 01:22:04,872 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 114 transitions. [2019-11-07 01:22:04,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2019-11-07 01:22:04,873 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:22:04,874 INFO L410 BasicCegarLoop]: trace histogram [56, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:22:05,077 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:22:05,078 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:22:05,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:22:05,078 INFO L82 PathProgramCache]: Analyzing trace with hash 591761656, now seen corresponding path program 7 times [2019-11-07 01:22:05,078 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:22:05,079 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775484487] [2019-11-07 01:22:05,079 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:22:05,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:22:05,516 INFO L134 CoverageAnalysis]: Checked inductivity of 1976 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 1786 trivial. 0 not checked. [2019-11-07 01:22:05,517 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775484487] [2019-11-07 01:22:05,517 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796116653] [2019-11-07 01:22:05,517 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:22:05,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:22:05,707 INFO L256 TraceCheckSpWp]: Trace formula consists of 559 conjuncts, 58 conjunts are in the unsatisfiable core [2019-11-07 01:22:05,720 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:22:07,780 INFO L134 CoverageAnalysis]: Checked inductivity of 1976 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 380 trivial. 0 not checked. [2019-11-07 01:22:07,780 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:22:12,084 INFO L134 CoverageAnalysis]: Checked inductivity of 1976 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 380 trivial. 0 not checked. [2019-11-07 01:22:12,085 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [387836555] [2019-11-07 01:22:12,087 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2019-11-07 01:22:12,087 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:22:12,087 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:22:12,088 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:22:12,088 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:22:12,114 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 01:22:12,369 WARN L191 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 41 [2019-11-07 01:22:12,615 WARN L191 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 41 [2019-11-07 01:22:12,676 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 29 for LOIs [2019-11-07 01:22:12,683 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 01:22:12,688 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:22:13,394 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 01:22:13,395 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 59, 59, 11] total 146 [2019-11-07 01:22:13,395 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489845034] [2019-11-07 01:22:13,396 INFO L442 AbstractCegarLoop]: Interpolant automaton has 146 states [2019-11-07 01:22:13,396 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:22:13,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 146 interpolants. [2019-11-07 01:22:13,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6929, Invalid=14241, Unknown=0, NotChecked=0, Total=21170 [2019-11-07 01:22:13,400 INFO L87 Difference]: Start difference. First operand 111 states and 114 transitions. Second operand 146 states.