/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/loop-crafted/simple_array_index_value_4.i.v+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-07 03:59:38,639 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-07 03:59:38,641 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-07 03:59:38,653 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-07 03:59:38,663 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-07 03:59:38,664 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-07 03:59:38,665 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-07 03:59:38,666 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-07 03:59:38,667 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-07 03:59:38,668 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-07 03:59:38,670 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-07 03:59:38,672 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-07 03:59:38,674 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-07 03:59:38,675 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-07 03:59:38,676 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-07 03:59:38,680 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-07 03:59:38,683 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-07 03:59:38,691 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-07 03:59:38,692 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-07 03:59:38,692 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-07 03:59:38,693 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 03:59:38,708 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-07 03:59:38,708 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-07 03:59:38,709 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-07 03:59:38,710 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-07 03:59:38,710 INFO L138 SettingsManager]: * Use SBE=true [2019-11-07 03:59:38,710 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-07 03:59:38,710 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-07 03:59:38,711 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-07 03:59:38,711 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-07 03:59:38,711 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-07 03:59:38,711 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-07 03:59:38,711 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-07 03:59:38,711 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-07 03:59:38,712 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-07 03:59:38,712 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-07 03:59:38,712 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-07 03:59:38,712 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-07 03:59:38,712 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-07 03:59:38,713 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-07 03:59:38,713 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-07 03:59:38,713 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-07 03:59:38,713 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 03:59:38,713 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-07 03:59:38,714 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-07 03:59:38,714 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-07 03:59:38,714 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-07 03:59:38,714 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-07 03:59:38,714 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-07 03:59:38,715 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 03:59:38,983 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-07 03:59:39,007 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-07 03:59:39,011 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-07 03:59:39,013 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-07 03:59:39,013 INFO L275 PluginConnector]: CDTParser initialized [2019-11-07 03:59:39,014 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-crafted/simple_array_index_value_4.i.v+lhb-reducer.c [2019-11-07 03:59:39,083 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8dc44a82c/419fd286fbee43208f5c1e5d6ff4dc08/FLAGa17aac421 [2019-11-07 03:59:39,561 INFO L306 CDTParser]: Found 1 translation units. [2019-11-07 03:59:39,561 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-crafted/simple_array_index_value_4.i.v+lhb-reducer.c [2019-11-07 03:59:39,572 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8dc44a82c/419fd286fbee43208f5c1e5d6ff4dc08/FLAGa17aac421 [2019-11-07 03:59:39,932 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8dc44a82c/419fd286fbee43208f5c1e5d6ff4dc08 [2019-11-07 03:59:39,948 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-07 03:59:39,950 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-07 03:59:39,968 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-07 03:59:39,969 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-07 03:59:39,977 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-07 03:59:39,978 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 03:59:39" (1/1) ... [2019-11-07 03:59:39,988 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1acb3b61 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:59:39, skipping insertion in model container [2019-11-07 03:59:39,988 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 03:59:39" (1/1) ... [2019-11-07 03:59:39,998 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-07 03:59:40,049 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-07 03:59:40,260 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 03:59:40,269 INFO L188 MainTranslator]: Completed pre-run [2019-11-07 03:59:40,406 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 03:59:40,426 INFO L192 MainTranslator]: Completed translation [2019-11-07 03:59:40,427 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:59:40 WrapperNode [2019-11-07 03:59:40,427 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-07 03:59:40,427 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-07 03:59:40,428 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-07 03:59:40,428 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-07 03:59:40,442 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:59:40" (1/1) ... [2019-11-07 03:59:40,442 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:59:40" (1/1) ... [2019-11-07 03:59:40,450 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:59:40" (1/1) ... [2019-11-07 03:59:40,451 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:59:40" (1/1) ... [2019-11-07 03:59:40,460 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:59:40" (1/1) ... [2019-11-07 03:59:40,464 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:59:40" (1/1) ... [2019-11-07 03:59:40,466 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:59:40" (1/1) ... [2019-11-07 03:59:40,469 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-07 03:59:40,470 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-07 03:59:40,470 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-07 03:59:40,470 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-07 03:59:40,471 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:59:40" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 03:59:40,535 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-07 03:59:40,535 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-07 03:59:40,535 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-07 03:59:40,535 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-07 03:59:40,536 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-11-07 03:59:40,536 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-11-07 03:59:40,536 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2019-11-07 03:59:40,536 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-07 03:59:40,536 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-07 03:59:40,536 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-07 03:59:40,537 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-07 03:59:40,537 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-07 03:59:40,537 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-07 03:59:40,537 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-07 03:59:40,963 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-07 03:59:40,964 INFO L284 CfgBuilder]: Removed 0 assume(true) statements. [2019-11-07 03:59:40,965 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 03:59:40 BoogieIcfgContainer [2019-11-07 03:59:40,965 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-07 03:59:40,966 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-07 03:59:40,966 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-07 03:59:40,969 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-07 03:59:40,969 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 03:59:39" (1/3) ... [2019-11-07 03:59:40,970 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53613fce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 03:59:40, skipping insertion in model container [2019-11-07 03:59:40,970 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:59:40" (2/3) ... [2019-11-07 03:59:40,970 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53613fce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 03:59:40, skipping insertion in model container [2019-11-07 03:59:40,971 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 03:59:40" (3/3) ... [2019-11-07 03:59:40,972 INFO L109 eAbstractionObserver]: Analyzing ICFG simple_array_index_value_4.i.v+lhb-reducer.c [2019-11-07 03:59:40,981 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-07 03:59:40,988 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 4 error locations. [2019-11-07 03:59:40,998 INFO L249 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2019-11-07 03:59:41,023 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-07 03:59:41,024 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-07 03:59:41,024 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-07 03:59:41,024 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-07 03:59:41,024 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-07 03:59:41,024 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-07 03:59:41,024 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-07 03:59:41,024 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-07 03:59:41,039 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states. [2019-11-07 03:59:41,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-11-07 03:59:41,045 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 03:59:41,046 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 03:59:41,048 INFO L410 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 03:59:41,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 03:59:41,053 INFO L82 PathProgramCache]: Analyzing trace with hash -2043100231, now seen corresponding path program 1 times [2019-11-07 03:59:41,060 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 03:59:41,061 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309636506] [2019-11-07 03:59:41,061 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 03:59:41,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 03:59:41,239 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 03:59:41,240 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309636506] [2019-11-07 03:59:41,241 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 03:59:41,242 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-07 03:59:41,242 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465901880] [2019-11-07 03:59:41,248 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 03:59:41,248 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 03:59:41,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 03:59:41,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 03:59:41,266 INFO L87 Difference]: Start difference. First operand 41 states. Second operand 3 states. [2019-11-07 03:59:41,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 03:59:41,313 INFO L93 Difference]: Finished difference Result 55 states and 73 transitions. [2019-11-07 03:59:41,316 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 03:59:41,318 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2019-11-07 03:59:41,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 03:59:41,332 INFO L225 Difference]: With dead ends: 55 [2019-11-07 03:59:41,332 INFO L226 Difference]: Without dead ends: 33 [2019-11-07 03:59:41,338 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 03:59:41,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-11-07 03:59:41,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 31. [2019-11-07 03:59:41,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-11-07 03:59:41,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2019-11-07 03:59:41,378 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 12 [2019-11-07 03:59:41,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 03:59:41,379 INFO L462 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2019-11-07 03:59:41,379 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 03:59:41,379 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2019-11-07 03:59:41,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-11-07 03:59:41,380 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 03:59:41,381 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 03:59:41,381 INFO L410 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 03:59:41,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 03:59:41,382 INFO L82 PathProgramCache]: Analyzing trace with hash -1071190840, now seen corresponding path program 1 times [2019-11-07 03:59:41,382 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 03:59:41,383 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299066101] [2019-11-07 03:59:41,383 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 03:59:41,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 03:59:41,456 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 03:59:41,457 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299066101] [2019-11-07 03:59:41,457 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 03:59:41,457 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-07 03:59:41,458 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026115918] [2019-11-07 03:59:41,459 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 03:59:41,460 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 03:59:41,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 03:59:41,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-07 03:59:41,461 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand 4 states. [2019-11-07 03:59:41,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 03:59:41,511 INFO L93 Difference]: Finished difference Result 52 states and 60 transitions. [2019-11-07 03:59:41,512 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-07 03:59:41,512 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2019-11-07 03:59:41,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 03:59:41,514 INFO L225 Difference]: With dead ends: 52 [2019-11-07 03:59:41,514 INFO L226 Difference]: Without dead ends: 50 [2019-11-07 03:59:41,515 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-07 03:59:41,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-11-07 03:59:41,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 33. [2019-11-07 03:59:41,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-11-07 03:59:41,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 38 transitions. [2019-11-07 03:59:41,524 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 38 transitions. Word has length 13 [2019-11-07 03:59:41,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 03:59:41,524 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 38 transitions. [2019-11-07 03:59:41,524 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 03:59:41,524 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 38 transitions. [2019-11-07 03:59:41,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-11-07 03:59:41,525 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 03:59:41,525 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 03:59:41,526 INFO L410 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 03:59:41,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 03:59:41,526 INFO L82 PathProgramCache]: Analyzing trace with hash -1006514579, now seen corresponding path program 1 times [2019-11-07 03:59:41,527 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 03:59:41,527 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188012045] [2019-11-07 03:59:41,527 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 03:59:41,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 03:59:41,592 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 03:59:41,593 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188012045] [2019-11-07 03:59:41,593 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 03:59:41,593 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-07 03:59:41,593 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822865954] [2019-11-07 03:59:41,596 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 03:59:41,596 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 03:59:41,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 03:59:41,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 03:59:41,597 INFO L87 Difference]: Start difference. First operand 33 states and 38 transitions. Second operand 3 states. [2019-11-07 03:59:41,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 03:59:41,662 INFO L93 Difference]: Finished difference Result 61 states and 69 transitions. [2019-11-07 03:59:41,663 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 03:59:41,663 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2019-11-07 03:59:41,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 03:59:41,664 INFO L225 Difference]: With dead ends: 61 [2019-11-07 03:59:41,664 INFO L226 Difference]: Without dead ends: 40 [2019-11-07 03:59:41,665 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 03:59:41,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-11-07 03:59:41,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 33. [2019-11-07 03:59:41,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-11-07 03:59:41,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2019-11-07 03:59:41,680 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 13 [2019-11-07 03:59:41,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 03:59:41,681 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2019-11-07 03:59:41,681 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 03:59:41,681 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2019-11-07 03:59:41,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-07 03:59:41,683 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 03:59:41,683 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 03:59:41,683 INFO L410 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 03:59:41,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 03:59:41,684 INFO L82 PathProgramCache]: Analyzing trace with hash 1210971472, now seen corresponding path program 1 times [2019-11-07 03:59:41,684 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 03:59:41,684 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494873468] [2019-11-07 03:59:41,685 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 03:59:41,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 03:59:41,733 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 03:59:41,734 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494873468] [2019-11-07 03:59:41,735 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 03:59:41,735 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-07 03:59:41,735 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474871608] [2019-11-07 03:59:41,735 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 03:59:41,736 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 03:59:41,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 03:59:41,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 03:59:41,737 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand 3 states. [2019-11-07 03:59:41,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 03:59:41,784 INFO L93 Difference]: Finished difference Result 55 states and 62 transitions. [2019-11-07 03:59:41,784 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 03:59:41,784 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 14 [2019-11-07 03:59:41,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 03:59:41,785 INFO L225 Difference]: With dead ends: 55 [2019-11-07 03:59:41,785 INFO L226 Difference]: Without dead ends: 34 [2019-11-07 03:59:41,786 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 03:59:41,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-11-07 03:59:41,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 28. [2019-11-07 03:59:41,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-11-07 03:59:41,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2019-11-07 03:59:41,791 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 14 [2019-11-07 03:59:41,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 03:59:41,791 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2019-11-07 03:59:41,791 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 03:59:41,791 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2019-11-07 03:59:41,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-07 03:59:41,792 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 03:59:41,792 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 03:59:41,793 INFO L410 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 03:59:41,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 03:59:41,793 INFO L82 PathProgramCache]: Analyzing trace with hash 1694409031, now seen corresponding path program 1 times [2019-11-07 03:59:41,793 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 03:59:41,793 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480769711] [2019-11-07 03:59:41,794 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 03:59:41,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 03:59:42,840 WARN L191 SmtUtils]: Spent 428.00 ms on a formula simplification. DAG size of input: 168 DAG size of output: 89 [2019-11-07 03:59:43,194 WARN L191 SmtUtils]: Spent 295.00 ms on a formula simplification. DAG size of input: 162 DAG size of output: 73 [2019-11-07 03:59:43,221 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 03:59:43,222 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480769711] [2019-11-07 03:59:43,222 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 03:59:43,222 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2019-11-07 03:59:43,223 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010473778] [2019-11-07 03:59:43,224 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-07 03:59:43,224 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 03:59:43,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-07 03:59:43,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2019-11-07 03:59:43,228 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand 9 states. [2019-11-07 03:59:43,432 WARN L191 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 42 [2019-11-07 03:59:43,582 WARN L191 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 46 [2019-11-07 03:59:43,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 03:59:43,639 INFO L93 Difference]: Finished difference Result 46 states and 53 transitions. [2019-11-07 03:59:43,642 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-07 03:59:43,642 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 19 [2019-11-07 03:59:43,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 03:59:43,643 INFO L225 Difference]: With dead ends: 46 [2019-11-07 03:59:43,643 INFO L226 Difference]: Without dead ends: 30 [2019-11-07 03:59:43,644 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2019-11-07 03:59:43,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-11-07 03:59:43,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2019-11-07 03:59:43,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-11-07 03:59:43,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2019-11-07 03:59:43,653 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 19 [2019-11-07 03:59:43,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 03:59:43,653 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2019-11-07 03:59:43,653 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-07 03:59:43,653 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2019-11-07 03:59:43,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-11-07 03:59:43,656 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 03:59:43,656 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 03:59:43,656 INFO L410 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 03:59:43,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 03:59:43,659 INFO L82 PathProgramCache]: Analyzing trace with hash 336204734, now seen corresponding path program 1 times [2019-11-07 03:59:43,660 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 03:59:43,660 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196767019] [2019-11-07 03:59:43,660 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 03:59:43,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 03:59:43,735 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 03:59:43,736 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196767019] [2019-11-07 03:59:43,736 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 03:59:43,737 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-07 03:59:43,737 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425073043] [2019-11-07 03:59:43,737 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-07 03:59:43,737 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 03:59:43,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-07 03:59:43,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-11-07 03:59:43,738 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand 6 states. [2019-11-07 03:59:43,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 03:59:43,802 INFO L93 Difference]: Finished difference Result 43 states and 45 transitions. [2019-11-07 03:59:43,803 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-07 03:59:43,804 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2019-11-07 03:59:43,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 03:59:43,804 INFO L225 Difference]: With dead ends: 43 [2019-11-07 03:59:43,807 INFO L226 Difference]: Without dead ends: 41 [2019-11-07 03:59:43,807 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2019-11-07 03:59:43,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-11-07 03:59:43,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 27. [2019-11-07 03:59:43,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-11-07 03:59:43,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2019-11-07 03:59:43,814 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 20 [2019-11-07 03:59:43,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 03:59:43,815 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2019-11-07 03:59:43,815 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-07 03:59:43,815 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2019-11-07 03:59:43,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-11-07 03:59:43,818 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 03:59:43,818 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 03:59:43,818 INFO L410 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 03:59:43,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 03:59:43,819 INFO L82 PathProgramCache]: Analyzing trace with hash -608232998, now seen corresponding path program 1 times [2019-11-07 03:59:43,820 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 03:59:43,820 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416715078] [2019-11-07 03:59:43,820 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 03:59:43,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 03:59:44,138 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 03:59:44,138 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416715078] [2019-11-07 03:59:44,139 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [352401660] [2019-11-07 03:59:44,139 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 03:59:44,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 03:59:44,195 INFO L256 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-07 03:59:44,201 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 03:59:44,312 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 03:59:44,312 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 03:59:46,428 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 03:59:46,429 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1745102052] [2019-11-07 03:59:46,463 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2019-11-07 03:59:46,463 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 03:59:46,469 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 03:59:46,474 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 03:59:46,475 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 03:59:46,609 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 30 for LOIs [2019-11-07 03:59:47,005 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 19 for LOIs [2019-11-07 03:59:47,009 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 03:59:47,171 WARN L191 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 61 [2019-11-07 03:59:50,723 WARN L191 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 46 [2019-11-07 03:59:51,672 WARN L191 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 48 [2019-11-07 03:59:53,895 WARN L191 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 52 [2019-11-07 03:59:54,140 WARN L191 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 52 [2019-11-07 03:59:54,840 WARN L191 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 65 [2019-11-07 03:59:55,532 WARN L191 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 70 [2019-11-07 03:59:58,306 WARN L191 SmtUtils]: Spent 409.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 73 [2019-11-07 03:59:58,669 WARN L191 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 60 [2019-11-07 03:59:58,877 WARN L191 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 62 [2019-11-07 03:59:58,880 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 03:59:58,880 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4, 18] total 27 [2019-11-07 03:59:58,881 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567728117] [2019-11-07 03:59:58,881 INFO L442 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-11-07 03:59:58,881 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 03:59:58,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-11-07 03:59:58,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=581, Unknown=0, NotChecked=0, Total=702 [2019-11-07 03:59:58,883 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 27 states. [2019-11-07 03:59:59,421 WARN L191 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 77 [2019-11-07 04:00:04,796 WARN L191 SmtUtils]: Spent 4.79 s on a formula simplification. DAG size of input: 106 DAG size of output: 94 [2019-11-07 04:00:11,140 WARN L191 SmtUtils]: Spent 2.07 s on a formula simplification. DAG size of input: 26 DAG size of output: 23 [2019-11-07 04:00:12,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:00:12,552 INFO L93 Difference]: Finished difference Result 41 states and 43 transitions. [2019-11-07 04:00:12,552 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-11-07 04:00:12,552 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 22 [2019-11-07 04:00:12,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:00:12,553 INFO L225 Difference]: With dead ends: 41 [2019-11-07 04:00:12,553 INFO L226 Difference]: Without dead ends: 0 [2019-11-07 04:00:12,554 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 43 SyntacticMatches, 4 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 25.7s TimeCoverageRelationStatistics Valid=166, Invalid=825, Unknown=1, NotChecked=0, Total=992 [2019-11-07 04:00:12,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-11-07 04:00:12,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-11-07 04:00:12,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-11-07 04:00:12,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-11-07 04:00:12,556 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 22 [2019-11-07 04:00:12,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:00:12,557 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-07 04:00:12,557 INFO L463 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-11-07 04:00:12,557 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-11-07 04:00:12,557 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-11-07 04:00:12,758 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 04:00:12,763 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions.