/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_copy1_ground-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-07 01:21:32,438 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2019-11-07 01:21:32,471 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-07 01:21:32,475 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-07 01:21:32,476 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-07 01:21:32,478 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-07 01:21:32,480 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-07 01:21:32,482 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-07 01:21:32,484 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-07 01:21:32,490 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-07 01:21:32,493 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-07 01:21:32,494 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-07 01:21:32,495 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-07 01:21:32,496 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-07 01:21:32,498 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-07 01:21:32,507 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-07 01:21:32,508 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-07 01:21:32,508 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-07 01:21:32,509 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 01:21:32,522 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-07 01:21:32,523 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-07 01:21:32,524 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-07 01:21:32,524 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-07 01:21:32,524 INFO L138 SettingsManager]: * Use SBE=true [2019-11-07 01:21:32,524 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-07 01:21:32,525 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-07 01:21:32,525 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-07 01:21:32,525 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-07 01:21:32,526 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-07 01:21:32,526 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-07 01:21:32,526 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-07 01:21:32,526 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-07 01:21:32,526 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-07 01:21:32,527 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-07 01:21:32,527 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-07 01:21:32,527 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-07 01:21:32,527 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-07 01:21:32,527 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-07 01:21:32,527 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-07 01:21:32,528 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-07 01:21:32,528 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 01:21:32,528 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-07 01:21:32,528 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-07 01:21:32,528 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-07 01:21:32,529 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-07 01:21:32,529 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-07 01:21:32,529 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-07 01:21:32,529 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 01:21:32,872 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-07 01:21:32,885 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-07 01:21:32,889 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-07 01:21:32,890 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-07 01:21:32,890 INFO L275 PluginConnector]: CDTParser initialized [2019-11-07 01:21:32,891 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_copy1_ground-2.i [2019-11-07 01:21:32,950 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2962358a2/08e27f21357a43ae91931287dcaef486/FLAG6bd12ca3e [2019-11-07 01:21:33,408 INFO L306 CDTParser]: Found 1 translation units. [2019-11-07 01:21:33,408 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_copy1_ground-2.i [2019-11-07 01:21:33,415 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2962358a2/08e27f21357a43ae91931287dcaef486/FLAG6bd12ca3e [2019-11-07 01:21:33,824 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2962358a2/08e27f21357a43ae91931287dcaef486 [2019-11-07 01:21:33,835 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-07 01:21:33,837 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-07 01:21:33,838 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-07 01:21:33,838 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-07 01:21:33,842 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-07 01:21:33,843 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:21:33" (1/1) ... [2019-11-07 01:21:33,846 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@570eb139 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:21:33, skipping insertion in model container [2019-11-07 01:21:33,846 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:21:33" (1/1) ... [2019-11-07 01:21:33,853 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-07 01:21:33,873 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-07 01:21:34,045 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 01:21:34,056 INFO L188 MainTranslator]: Completed pre-run [2019-11-07 01:21:34,079 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 01:21:34,098 INFO L192 MainTranslator]: Completed translation [2019-11-07 01:21:34,099 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:21:34 WrapperNode [2019-11-07 01:21:34,099 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-07 01:21:34,099 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-07 01:21:34,099 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-07 01:21:34,099 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-07 01:21:34,185 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:21:34" (1/1) ... [2019-11-07 01:21:34,186 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:21:34" (1/1) ... [2019-11-07 01:21:34,194 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:21:34" (1/1) ... [2019-11-07 01:21:34,194 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:21:34" (1/1) ... [2019-11-07 01:21:34,201 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:21:34" (1/1) ... [2019-11-07 01:21:34,207 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:21:34" (1/1) ... [2019-11-07 01:21:34,208 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:21:34" (1/1) ... [2019-11-07 01:21:34,210 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-07 01:21:34,210 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-07 01:21:34,211 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-07 01:21:34,211 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-07 01:21:34,212 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:21:34" (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 01:21:34,261 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-07 01:21:34,261 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-07 01:21:34,261 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-11-07 01:21:34,261 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-07 01:21:34,262 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-07 01:21:34,262 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-11-07 01:21:34,262 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-07 01:21:34,262 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-07 01:21:34,262 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-07 01:21:34,263 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-07 01:21:34,263 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-07 01:21:34,263 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-07 01:21:34,263 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-07 01:21:34,263 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-07 01:21:34,622 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-07 01:21:34,623 INFO L284 CfgBuilder]: Removed 3 assume(true) statements. [2019-11-07 01:21:34,624 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:21:34 BoogieIcfgContainer [2019-11-07 01:21:34,624 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-07 01:21:34,625 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-07 01:21:34,626 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-07 01:21:34,629 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-07 01:21:34,629 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:21:33" (1/3) ... [2019-11-07 01:21:34,630 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ac7304f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:21:34, skipping insertion in model container [2019-11-07 01:21:34,630 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:21:34" (2/3) ... [2019-11-07 01:21:34,630 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ac7304f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:21:34, skipping insertion in model container [2019-11-07 01:21:34,630 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:21:34" (3/3) ... [2019-11-07 01:21:34,632 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_copy1_ground-2.i [2019-11-07 01:21:34,640 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-07 01:21:34,648 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-07 01:21:34,659 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-07 01:21:34,679 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-07 01:21:34,680 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-07 01:21:34,680 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-07 01:21:34,680 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-07 01:21:34,680 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-07 01:21:34,680 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-07 01:21:34,680 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-07 01:21:34,680 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-07 01:21:34,695 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2019-11-07 01:21:34,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-11-07 01:21:34,700 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:21:34,701 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:21:34,703 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:21:34,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:21:34,707 INFO L82 PathProgramCache]: Analyzing trace with hash 1524454115, now seen corresponding path program 1 times [2019-11-07 01:21:34,714 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:21:34,715 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941013039] [2019-11-07 01:21:34,715 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:21:34,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:21:34,868 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 01:21:34,869 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941013039] [2019-11-07 01:21:34,870 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 01:21:34,870 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-07 01:21:34,871 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064461887] [2019-11-07 01:21:34,875 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 01:21:34,876 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:21:34,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 01:21:34,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 01:21:34,893 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 3 states. [2019-11-07 01:21:34,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:21:34,927 INFO L93 Difference]: Finished difference Result 33 states and 40 transitions. [2019-11-07 01:21:34,928 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 01:21:34,929 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2019-11-07 01:21:34,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:21:34,936 INFO L225 Difference]: With dead ends: 33 [2019-11-07 01:21:34,937 INFO L226 Difference]: Without dead ends: 17 [2019-11-07 01:21:34,940 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 01:21:34,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2019-11-07 01:21:34,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2019-11-07 01:21:34,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-11-07 01:21:34,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2019-11-07 01:21:34,972 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 12 [2019-11-07 01:21:34,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:21:34,973 INFO L462 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2019-11-07 01:21:34,973 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 01:21:34,973 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2019-11-07 01:21:34,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-11-07 01:21:34,974 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:21:34,974 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:21:34,975 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:21:34,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:21:34,975 INFO L82 PathProgramCache]: Analyzing trace with hash -32570220, now seen corresponding path program 1 times [2019-11-07 01:21:34,976 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:21:34,976 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423327882] [2019-11-07 01:21:34,976 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:21:34,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:21:35,043 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 01:21:35,044 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423327882] [2019-11-07 01:21:35,044 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 01:21:35,045 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-07 01:21:35,045 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910529875] [2019-11-07 01:21:35,047 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 01:21:35,047 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:21:35,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 01:21:35,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 01:21:35,048 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand 3 states. [2019-11-07 01:21:35,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:21:35,058 INFO L93 Difference]: Finished difference Result 27 states and 30 transitions. [2019-11-07 01:21:35,058 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 01:21:35,059 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2019-11-07 01:21:35,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:21:35,060 INFO L225 Difference]: With dead ends: 27 [2019-11-07 01:21:35,060 INFO L226 Difference]: Without dead ends: 18 [2019-11-07 01:21:35,061 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 01:21:35,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2019-11-07 01:21:35,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2019-11-07 01:21:35,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-11-07 01:21:35,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2019-11-07 01:21:35,067 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 13 [2019-11-07 01:21:35,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:21:35,067 INFO L462 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2019-11-07 01:21:35,067 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 01:21:35,067 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2019-11-07 01:21:35,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-07 01:21:35,068 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:21:35,068 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:21:35,069 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:21:35,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:21:35,069 INFO L82 PathProgramCache]: Analyzing trace with hash 1459604560, now seen corresponding path program 1 times [2019-11-07 01:21:35,070 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:21:35,070 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861024319] [2019-11-07 01:21:35,070 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:21:35,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:21:35,157 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-07 01:21:35,157 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861024319] [2019-11-07 01:21:35,158 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [957490960] [2019-11-07 01:21:35,158 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 01:21:35,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:21:35,215 INFO L256 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 01:21:35,222 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:21:35,275 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-07 01:21:35,275 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:21:35,317 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-07 01:21:35,318 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1052369119] [2019-11-07 01:21:35,344 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2019-11-07 01:21:35,344 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:21:35,351 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:21:35,358 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:21:35,359 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:21:35,512 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 01:21:35,816 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 29 for LOIs [2019-11-07 01:21:35,831 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 01:21:35,834 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:21:36,186 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 01:21:36,186 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 11] total 18 [2019-11-07 01:21:36,187 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318097936] [2019-11-07 01:21:36,188 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-11-07 01:21:36,188 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:21:36,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-11-07 01:21:36,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2019-11-07 01:21:36,190 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand 18 states. [2019-11-07 01:21:36,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:21:36,859 INFO L93 Difference]: Finished difference Result 42 states and 49 transitions. [2019-11-07 01:21:36,859 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-11-07 01:21:36,860 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-11-07 01:21:36,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:21:36,861 INFO L225 Difference]: With dead ends: 42 [2019-11-07 01:21:36,861 INFO L226 Difference]: Without dead ends: 31 [2019-11-07 01:21:36,863 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=145, Invalid=785, Unknown=0, NotChecked=0, Total=930 [2019-11-07 01:21:36,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-11-07 01:21:36,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 22. [2019-11-07 01:21:36,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-11-07 01:21:36,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2019-11-07 01:21:36,881 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 14 [2019-11-07 01:21:36,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:21:36,881 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2019-11-07 01:21:36,882 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-11-07 01:21:36,882 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2019-11-07 01:21:36,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-11-07 01:21:36,884 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:21:36,884 INFO L410 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:21:37,088 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:21:37,088 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:21:37,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:21:37,089 INFO L82 PathProgramCache]: Analyzing trace with hash -2046081309, now seen corresponding path program 2 times [2019-11-07 01:21:37,089 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:21:37,089 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100379200] [2019-11-07 01:21:37,089 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:21:37,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:21:37,241 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-11-07 01:21:37,242 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100379200] [2019-11-07 01:21:37,243 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256973701] [2019-11-07 01:21:37,243 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 01:21:37,289 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-11-07 01:21:37,289 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-07 01:21:37,290 INFO L256 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-07 01:21:37,292 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:21:37,305 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-11-07 01:21:37,305 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:21:37,330 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-11-07 01:21:37,330 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [22004705] [2019-11-07 01:21:37,332 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2019-11-07 01:21:37,333 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:21:37,334 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:21:37,334 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:21:37,335 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:21:37,367 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 01:21:37,555 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 29 for LOIs [2019-11-07 01:21:37,563 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 01:21:37,565 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:21:37,805 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 01:21:37,805 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 11] total 19 [2019-11-07 01:21:37,806 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832206058] [2019-11-07 01:21:37,807 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-11-07 01:21:37,807 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:21:37,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-11-07 01:21:37,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2019-11-07 01:21:37,808 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand 19 states. [2019-11-07 01:21:38,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:21:38,426 INFO L93 Difference]: Finished difference Result 44 states and 50 transitions. [2019-11-07 01:21:38,426 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-11-07 01:21:38,427 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 18 [2019-11-07 01:21:38,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:21:38,428 INFO L225 Difference]: With dead ends: 44 [2019-11-07 01:21:38,428 INFO L226 Difference]: Without dead ends: 35 [2019-11-07 01:21:38,429 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=186, Invalid=806, Unknown=0, NotChecked=0, Total=992 [2019-11-07 01:21:38,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-11-07 01:21:38,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 26. [2019-11-07 01:21:38,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-11-07 01:21:38,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2019-11-07 01:21:38,436 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 18 [2019-11-07 01:21:38,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:21:38,437 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2019-11-07 01:21:38,437 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-11-07 01:21:38,437 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2019-11-07 01:21:38,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-11-07 01:21:38,438 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:21:38,438 INFO L410 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:21:38,638 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:21:38,641 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:21:38,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:21:38,647 INFO L82 PathProgramCache]: Analyzing trace with hash -398092701, now seen corresponding path program 3 times [2019-11-07 01:21:38,647 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:21:38,647 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317570312] [2019-11-07 01:21:38,647 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:21:38,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:21:38,757 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-11-07 01:21:38,758 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317570312] [2019-11-07 01:21:38,758 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1084333068] [2019-11-07 01:21:38,758 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 01:21:38,804 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-07 01:21:38,804 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-07 01:21:38,805 INFO L256 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-07 01:21:38,807 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:21:38,854 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-11-07 01:21:38,855 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:21:38,929 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-11-07 01:21:38,930 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [46444129] [2019-11-07 01:21:38,931 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2019-11-07 01:21:38,931 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:21:38,932 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:21:38,932 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:21:38,932 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:21:38,954 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 01:21:39,106 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 29 for LOIs [2019-11-07 01:21:39,112 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 01:21:39,114 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:21:39,388 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 01:21:39,388 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7, 11] total 29 [2019-11-07 01:21:39,389 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672120313] [2019-11-07 01:21:39,389 INFO L442 AbstractCegarLoop]: Interpolant automaton has 29 states [2019-11-07 01:21:39,390 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:21:39,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2019-11-07 01:21:39,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=682, Unknown=0, NotChecked=0, Total=812 [2019-11-07 01:21:39,391 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand 29 states. [2019-11-07 01:21:40,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:21:40,487 INFO L93 Difference]: Finished difference Result 58 states and 68 transitions. [2019-11-07 01:21:40,488 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-11-07 01:21:40,488 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 22 [2019-11-07 01:21:40,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:21:40,489 INFO L225 Difference]: With dead ends: 58 [2019-11-07 01:21:40,490 INFO L226 Difference]: Without dead ends: 42 [2019-11-07 01:21:40,492 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 672 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=398, Invalid=2358, Unknown=0, NotChecked=0, Total=2756 [2019-11-07 01:21:40,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2019-11-07 01:21:40,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 33. [2019-11-07 01:21:40,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-11-07 01:21:40,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2019-11-07 01:21:40,500 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 22 [2019-11-07 01:21:40,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:21:40,501 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2019-11-07 01:21:40,501 INFO L463 AbstractCegarLoop]: Interpolant automaton has 29 states. [2019-11-07 01:21:40,501 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2019-11-07 01:21:40,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-11-07 01:21:40,502 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:21:40,503 INFO L410 BasicCegarLoop]: trace histogram [10, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:21:40,708 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:21:40,708 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:21:40,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:21:40,710 INFO L82 PathProgramCache]: Analyzing trace with hash 1654238721, now seen corresponding path program 4 times [2019-11-07 01:21:40,710 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:21:40,710 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044112299] [2019-11-07 01:21:40,710 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:21:40,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:21:41,008 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2019-11-07 01:21:41,008 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044112299] [2019-11-07 01:21:41,008 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500723659] [2019-11-07 01:21:41,009 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 01:21:41,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:21:41,095 INFO L256 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-07 01:21:41,111 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:21:41,121 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2019-11-07 01:21:41,121 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:21:41,317 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2019-11-07 01:21:41,317 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1052814964] [2019-11-07 01:21:41,318 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2019-11-07 01:21:41,318 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:21:41,318 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:21:41,319 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:21:41,320 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:21:41,339 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 01:21:41,450 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 29 for LOIs [2019-11-07 01:21:41,460 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 01:21:41,467 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:21:41,727 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 01:21:41,728 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13, 11] total 35 [2019-11-07 01:21:41,728 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902819891] [2019-11-07 01:21:41,729 INFO L442 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-11-07 01:21:41,729 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:21:41,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-11-07 01:21:41,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=329, Invalid=861, Unknown=0, NotChecked=0, Total=1190 [2019-11-07 01:21:41,732 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand 35 states. [2019-11-07 01:21:43,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:21:43,043 INFO L93 Difference]: Finished difference Result 71 states and 86 transitions. [2019-11-07 01:21:43,044 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-11-07 01:21:43,044 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 29 [2019-11-07 01:21:43,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:21:43,045 INFO L225 Difference]: With dead ends: 71 [2019-11-07 01:21:43,045 INFO L226 Difference]: Without dead ends: 54 [2019-11-07 01:21:43,047 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1029 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=934, Invalid=3098, Unknown=0, NotChecked=0, Total=4032 [2019-11-07 01:21:43,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-11-07 01:21:43,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 45. [2019-11-07 01:21:43,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2019-11-07 01:21:43,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2019-11-07 01:21:43,056 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 29 [2019-11-07 01:21:43,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:21:43,057 INFO L462 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2019-11-07 01:21:43,057 INFO L463 AbstractCegarLoop]: Interpolant automaton has 35 states. [2019-11-07 01:21:43,057 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2019-11-07 01:21:43,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-11-07 01:21:43,058 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:21:43,058 INFO L410 BasicCegarLoop]: trace histogram [22, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:21:43,259 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:21:43,259 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:21:43,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:21:43,259 INFO L82 PathProgramCache]: Analyzing trace with hash 243464513, now seen corresponding path program 5 times [2019-11-07 01:21:43,260 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:21:43,260 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997469909] [2019-11-07 01:21:43,260 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:21:43,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:21:43,776 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2019-11-07 01:21:43,776 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997469909] [2019-11-07 01:21:43,777 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1351156145] [2019-11-07 01:21:43,778 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 01:21:43,937 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-11-07 01:21:43,937 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-07 01:21:43,939 INFO L256 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-07 01:21:43,943 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:21:44,117 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2019-11-07 01:21:44,117 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:21:44,287 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2019-11-07 01:21:44,288 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1808307097] [2019-11-07 01:21:44,289 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2019-11-07 01:21:44,289 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:21:44,290 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:21:44,290 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:21:44,290 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:21:44,314 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 01:21:44,429 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 29 for LOIs [2019-11-07 01:21:44,438 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 01:21:44,440 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:21:44,993 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 01:21:44,993 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 10, 10, 11] total 51 [2019-11-07 01:21:44,994 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864466626] [2019-11-07 01:21:44,995 INFO L442 AbstractCegarLoop]: Interpolant automaton has 51 states [2019-11-07 01:21:44,995 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:21:44,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2019-11-07 01:21:45,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=481, Invalid=2069, Unknown=0, NotChecked=0, Total=2550 [2019-11-07 01:21:45,003 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand 51 states. [2019-11-07 01:21:47,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:21:47,635 INFO L93 Difference]: Finished difference Result 81 states and 94 transitions. [2019-11-07 01:21:47,636 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2019-11-07 01:21:47,636 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 41 [2019-11-07 01:21:47,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:21:47,638 INFO L225 Difference]: With dead ends: 81 [2019-11-07 01:21:47,638 INFO L226 Difference]: Without dead ends: 64 [2019-11-07 01:21:47,641 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2221 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=1469, Invalid=7843, Unknown=0, NotChecked=0, Total=9312 [2019-11-07 01:21:47,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2019-11-07 01:21:47,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 55. [2019-11-07 01:21:47,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2019-11-07 01:21:47,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 57 transitions. [2019-11-07 01:21:47,663 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 57 transitions. Word has length 41 [2019-11-07 01:21:47,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:21:47,663 INFO L462 AbstractCegarLoop]: Abstraction has 55 states and 57 transitions. [2019-11-07 01:21:47,663 INFO L463 AbstractCegarLoop]: Interpolant automaton has 51 states. [2019-11-07 01:21:47,664 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 57 transitions. [2019-11-07 01:21:47,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-11-07 01:21:47,666 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:21:47,666 INFO L410 BasicCegarLoop]: trace histogram [23, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:21:47,867 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:21:47,868 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:21:47,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:21:47,869 INFO L82 PathProgramCache]: Analyzing trace with hash 2063520052, now seen corresponding path program 6 times [2019-11-07 01:21:47,869 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:21:47,870 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711554965] [2019-11-07 01:21:47,870 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:21:47,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:21:48,202 INFO L134 CoverageAnalysis]: Checked inductivity of 412 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2019-11-07 01:21:48,203 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711554965] [2019-11-07 01:21:48,203 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [591886089] [2019-11-07 01:21:48,203 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 01:21:48,296 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-07 01:21:48,296 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-07 01:21:48,297 INFO L256 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 25 conjunts are in the unsatisfiable core [2019-11-07 01:21:48,301 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:21:48,317 INFO L134 CoverageAnalysis]: Checked inductivity of 412 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2019-11-07 01:21:48,317 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:21:49,011 INFO L134 CoverageAnalysis]: Checked inductivity of 412 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2019-11-07 01:21:49,011 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1326682913] [2019-11-07 01:21:49,012 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2019-11-07 01:21:49,012 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:21:49,012 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:21:49,014 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:21:49,014 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:21:49,042 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 01:21:49,171 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 29 for LOIs [2019-11-07 01:21:49,178 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 01:21:49,181 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:21:49,539 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 01:21:49,539 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26, 11] total 61 [2019-11-07 01:21:49,539 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585150053] [2019-11-07 01:21:49,540 INFO L442 AbstractCegarLoop]: Interpolant automaton has 61 states [2019-11-07 01:21:49,540 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:21:49,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2019-11-07 01:21:49,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1304, Invalid=2356, Unknown=0, NotChecked=0, Total=3660 [2019-11-07 01:21:49,542 INFO L87 Difference]: Start difference. First operand 55 states and 57 transitions. Second operand 61 states. [2019-11-07 01:21:52,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:21:52,284 INFO L93 Difference]: Finished difference Result 115 states and 143 transitions. [2019-11-07 01:21:52,285 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2019-11-07 01:21:52,285 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 51 [2019-11-07 01:21:52,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:21:52,287 INFO L225 Difference]: With dead ends: 115 [2019-11-07 01:21:52,287 INFO L226 Difference]: Without dead ends: 89 [2019-11-07 01:21:52,304 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2979 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=3807, Invalid=9533, Unknown=0, NotChecked=0, Total=13340 [2019-11-07 01:21:52,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2019-11-07 01:21:52,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 80. [2019-11-07 01:21:52,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2019-11-07 01:21:52,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 82 transitions. [2019-11-07 01:21:52,316 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 82 transitions. Word has length 51 [2019-11-07 01:21:52,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:21:52,316 INFO L462 AbstractCegarLoop]: Abstraction has 80 states and 82 transitions. [2019-11-07 01:21:52,316 INFO L463 AbstractCegarLoop]: Interpolant automaton has 61 states. [2019-11-07 01:21:52,316 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 82 transitions. [2019-11-07 01:21:52,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2019-11-07 01:21:52,318 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:21:52,318 INFO L410 BasicCegarLoop]: trace histogram [48, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:21:52,521 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:21:52,522 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:21:52,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:21:52,523 INFO L82 PathProgramCache]: Analyzing trace with hash 1307214819, now seen corresponding path program 7 times [2019-11-07 01:21:52,523 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:21:52,523 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642170624] [2019-11-07 01:21:52,523 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:21:52,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:21:53,591 INFO L134 CoverageAnalysis]: Checked inductivity of 1312 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2019-11-07 01:21:53,591 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642170624] [2019-11-07 01:21:53,592 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467809909] [2019-11-07 01:21:53,592 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 01:21:53,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:21:53,743 INFO L256 TraceCheckSpWp]: Trace formula consists of 510 conjuncts, 50 conjunts are in the unsatisfiable core [2019-11-07 01:21:53,749 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:21:53,802 INFO L134 CoverageAnalysis]: Checked inductivity of 1312 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2019-11-07 01:21:53,803 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:21:56,422 INFO L134 CoverageAnalysis]: Checked inductivity of 1312 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2019-11-07 01:21:56,423 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1599734108] [2019-11-07 01:21:56,424 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2019-11-07 01:21:56,424 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:21:56,425 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:21:56,425 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:21:56,425 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:21:56,448 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 01:21:56,543 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 29 for LOIs [2019-11-07 01:21:56,547 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 01:21:56,548 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:21:57,019 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 01:21:57,020 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51, 51, 11] total 111 [2019-11-07 01:21:57,020 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357855074] [2019-11-07 01:21:57,022 INFO L442 AbstractCegarLoop]: Interpolant automaton has 111 states [2019-11-07 01:21:57,022 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:21:57,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2019-11-07 01:21:57,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5079, Invalid=7131, Unknown=0, NotChecked=0, Total=12210 [2019-11-07 01:21:57,027 INFO L87 Difference]: Start difference. First operand 80 states and 82 transitions. Second operand 111 states. [2019-11-07 01:22:04,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:22:04,449 INFO L93 Difference]: Finished difference Result 165 states and 218 transitions. [2019-11-07 01:22:04,450 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2019-11-07 01:22:04,450 INFO L78 Accepts]: Start accepts. Automaton has 111 states. Word has length 76 [2019-11-07 01:22:04,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:22:04,452 INFO L225 Difference]: With dead ends: 165 [2019-11-07 01:22:04,452 INFO L226 Difference]: Without dead ends: 139 [2019-11-07 01:22:04,458 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 384 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 214 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9104 ImplicationChecksByTransitivity, 10.7s TimeCoverageRelationStatistics Valid=15032, Invalid=31408, Unknown=0, NotChecked=0, Total=46440 [2019-11-07 01:22:04,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2019-11-07 01:22:04,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 130. [2019-11-07 01:22:04,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2019-11-07 01:22:04,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 132 transitions. [2019-11-07 01:22:04,473 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 132 transitions. Word has length 76 [2019-11-07 01:22:04,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:22:04,474 INFO L462 AbstractCegarLoop]: Abstraction has 130 states and 132 transitions. [2019-11-07 01:22:04,474 INFO L463 AbstractCegarLoop]: Interpolant automaton has 111 states. [2019-11-07 01:22:04,474 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 132 transitions. [2019-11-07 01:22:04,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2019-11-07 01:22:04,476 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:22:04,476 INFO L410 BasicCegarLoop]: trace histogram [98, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:22:04,678 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:22:04,679 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:22:04,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:22:04,679 INFO L82 PathProgramCache]: Analyzing trace with hash -240161533, now seen corresponding path program 8 times [2019-11-07 01:22:04,679 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:22:04,680 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124714352] [2019-11-07 01:22:04,680 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:22:04,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:22:08,625 INFO L134 CoverageAnalysis]: Checked inductivity of 4987 backedges. 0 proven. 4851 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2019-11-07 01:22:08,625 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124714352] [2019-11-07 01:22:08,625 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682866504] [2019-11-07 01:22:08,626 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:22:10,178 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2019-11-07 01:22:10,178 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-07 01:22:10,180 INFO L256 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 18 conjunts are in the unsatisfiable core [2019-11-07 01:22:10,184 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:22:10,914 INFO L134 CoverageAnalysis]: Checked inductivity of 4987 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 4851 trivial. 0 not checked. [2019-11-07 01:22:10,914 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:22:11,905 INFO L134 CoverageAnalysis]: Checked inductivity of 4987 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 4851 trivial. 0 not checked. [2019-11-07 01:22:11,905 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1060955817] [2019-11-07 01:22:11,906 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2019-11-07 01:22:11,906 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:22:11,907 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:22:11,907 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:22:11,907 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:22:11,927 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 01:22:12,020 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 29 for LOIs [2019-11-07 01:22:12,026 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 01:22:12,028 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:22:12,832 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 01:22:12,832 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 19, 19, 11] total 145 [2019-11-07 01:22:12,833 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077370249] [2019-11-07 01:22:12,834 INFO L442 AbstractCegarLoop]: Interpolant automaton has 145 states [2019-11-07 01:22:12,834 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:22:12,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 145 interpolants. [2019-11-07 01:22:12,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5708, Invalid=15172, Unknown=0, NotChecked=0, Total=20880 [2019-11-07 01:22:12,837 INFO L87 Difference]: Start difference. First operand 130 states and 132 transitions. Second operand 145 states.