/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/eca-rers2012/Problem03_label22.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-07 01:41:47,079 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2019-11-07 01:41:47,132 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-07 01:41:47,133 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-07 01:41:47,134 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-07 01:41:47,135 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 01:41:47,149 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-07 01:41:47,149 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-07 01:41:47,152 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-07 01:41:47,152 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-07 01:41:47,152 INFO L138 SettingsManager]: * Use SBE=true [2019-11-07 01:41:47,152 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-07 01:41:47,153 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-07 01:41:47,153 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-07 01:41:47,153 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-07 01:41:47,153 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-07 01:41:47,153 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-07 01:41:47,153 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-07 01:41:47,154 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-07 01:41:47,154 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-07 01:41:47,154 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-07 01:41:47,154 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-07 01:41:47,155 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-07 01:41:47,155 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-07 01:41:47,155 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-07 01:41:47,155 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-07 01:41:47,155 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-07 01:41:47,156 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 01:41:47,157 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-07 01:41:47,157 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-07 01:41:47,157 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-07 01:41:47,158 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-07 01:41:47,158 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-07 01:41:47,158 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-07 01:41:47,159 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 01:41:47,441 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-07 01:41:47,454 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-07 01:41:47,458 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-07 01:41:47,459 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-07 01:41:47,460 INFO L275 PluginConnector]: CDTParser initialized [2019-11-07 01:41:47,461 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label22.c [2019-11-07 01:41:47,539 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/be9a7d12d/e04f5e057be043bc95d8f1283705c909/FLAG37493187c [2019-11-07 01:41:48,200 INFO L306 CDTParser]: Found 1 translation units. [2019-11-07 01:41:48,201 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem03_label22.c [2019-11-07 01:41:48,220 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/be9a7d12d/e04f5e057be043bc95d8f1283705c909/FLAG37493187c [2019-11-07 01:41:48,439 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/be9a7d12d/e04f5e057be043bc95d8f1283705c909 [2019-11-07 01:41:48,450 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-07 01:41:48,452 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-07 01:41:48,454 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-07 01:41:48,454 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-07 01:41:48,458 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-07 01:41:48,459 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:41:48" (1/1) ... [2019-11-07 01:41:48,462 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4e0f3d4b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:41:48, skipping insertion in model container [2019-11-07 01:41:48,462 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:41:48" (1/1) ... [2019-11-07 01:41:48,471 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-07 01:41:48,557 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-07 01:41:49,341 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 01:41:49,364 INFO L188 MainTranslator]: Completed pre-run [2019-11-07 01:41:49,723 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 01:41:49,750 INFO L192 MainTranslator]: Completed translation [2019-11-07 01:41:49,751 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:41:49 WrapperNode [2019-11-07 01:41:49,751 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-07 01:41:49,752 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-07 01:41:49,752 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-07 01:41:49,752 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-07 01:41:49,767 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:41:49" (1/1) ... [2019-11-07 01:41:49,767 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:41:49" (1/1) ... [2019-11-07 01:41:49,813 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:41:49" (1/1) ... [2019-11-07 01:41:49,814 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:41:49" (1/1) ... [2019-11-07 01:41:49,877 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:41:49" (1/1) ... [2019-11-07 01:41:49,891 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:41:49" (1/1) ... [2019-11-07 01:41:49,912 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:41:49" (1/1) ... [2019-11-07 01:41:49,928 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-07 01:41:49,928 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-07 01:41:49,928 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-07 01:41:49,929 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-07 01:41:49,937 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:41:49" (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 01:41:49,996 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-07 01:41:49,996 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-07 01:41:49,996 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-07 01:41:49,996 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-07 01:41:49,997 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-07 01:41:49,997 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-07 01:41:49,997 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-07 01:41:49,997 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-07 01:41:49,997 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-07 01:41:49,998 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-07 01:41:49,998 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-07 01:41:53,001 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-07 01:41:53,002 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-07 01:41:53,004 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:41:53 BoogieIcfgContainer [2019-11-07 01:41:53,004 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-07 01:41:53,005 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-07 01:41:53,005 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-07 01:41:53,008 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-07 01:41:53,008 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:41:48" (1/3) ... [2019-11-07 01:41:53,009 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5657b4ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:41:53, skipping insertion in model container [2019-11-07 01:41:53,010 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:41:49" (2/3) ... [2019-11-07 01:41:53,010 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5657b4ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:41:53, skipping insertion in model container [2019-11-07 01:41:53,010 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:41:53" (3/3) ... [2019-11-07 01:41:53,012 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem03_label22.c [2019-11-07 01:41:53,022 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-07 01:41:53,030 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-07 01:41:53,042 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-07 01:41:53,069 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-07 01:41:53,069 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-07 01:41:53,069 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-07 01:41:53,070 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-07 01:41:53,070 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-07 01:41:53,070 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-07 01:41:53,070 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-07 01:41:53,070 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-07 01:41:53,093 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states. [2019-11-07 01:41:53,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2019-11-07 01:41:53,107 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:41:53,108 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:41:53,110 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:41:53,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:41:53,116 INFO L82 PathProgramCache]: Analyzing trace with hash 136469798, now seen corresponding path program 1 times [2019-11-07 01:41:53,126 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:41:53,126 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731799428] [2019-11-07 01:41:53,127 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:41:53,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:41:53,913 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 01:41:53,914 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731799428] [2019-11-07 01:41:53,915 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 01:41:53,915 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-07 01:41:53,917 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465114453] [2019-11-07 01:41:53,922 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 01:41:53,923 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:41:53,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 01:41:53,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 01:41:53,939 INFO L87 Difference]: Start difference. First operand 158 states. Second operand 3 states. [2019-11-07 01:41:54,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:41:54,969 INFO L93 Difference]: Finished difference Result 462 states and 886 transitions. [2019-11-07 01:41:54,971 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 01:41:54,972 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 149 [2019-11-07 01:41:54,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:41:54,996 INFO L225 Difference]: With dead ends: 462 [2019-11-07 01:41:54,996 INFO L226 Difference]: Without dead ends: 301 [2019-11-07 01:41:55,001 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 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 01:41:55,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2019-11-07 01:41:55,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 301. [2019-11-07 01:41:55,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 301 states. [2019-11-07 01:41:55,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 564 transitions. [2019-11-07 01:41:55,075 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 564 transitions. Word has length 149 [2019-11-07 01:41:55,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:41:55,077 INFO L462 AbstractCegarLoop]: Abstraction has 301 states and 564 transitions. [2019-11-07 01:41:55,077 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 01:41:55,077 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 564 transitions. [2019-11-07 01:41:55,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2019-11-07 01:41:55,083 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:41:55,083 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:41:55,084 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:41:55,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:41:55,084 INFO L82 PathProgramCache]: Analyzing trace with hash 558839741, now seen corresponding path program 1 times [2019-11-07 01:41:55,084 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:41:55,088 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873733885] [2019-11-07 01:41:55,088 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:41:55,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:41:55,344 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:41:55,345 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873733885] [2019-11-07 01:41:55,346 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 01:41:55,346 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-07 01:41:55,346 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143249425] [2019-11-07 01:41:55,349 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-07 01:41:55,349 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:41:55,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-07 01:41:55,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-07 01:41:55,350 INFO L87 Difference]: Start difference. First operand 301 states and 564 transitions. Second operand 6 states. [2019-11-07 01:41:56,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:41:56,739 INFO L93 Difference]: Finished difference Result 929 states and 1794 transitions. [2019-11-07 01:41:56,742 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-07 01:41:56,742 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 158 [2019-11-07 01:41:56,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:41:56,751 INFO L225 Difference]: With dead ends: 929 [2019-11-07 01:41:56,751 INFO L226 Difference]: Without dead ends: 633 [2019-11-07 01:41:56,755 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-11-07 01:41:56,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 633 states. [2019-11-07 01:41:56,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 633 to 603. [2019-11-07 01:41:56,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 603 states. [2019-11-07 01:41:56,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 603 states to 603 states and 1113 transitions. [2019-11-07 01:41:56,834 INFO L78 Accepts]: Start accepts. Automaton has 603 states and 1113 transitions. Word has length 158 [2019-11-07 01:41:56,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:41:56,834 INFO L462 AbstractCegarLoop]: Abstraction has 603 states and 1113 transitions. [2019-11-07 01:41:56,834 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-07 01:41:56,834 INFO L276 IsEmpty]: Start isEmpty. Operand 603 states and 1113 transitions. [2019-11-07 01:41:56,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2019-11-07 01:41:56,841 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:41:56,841 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:41:56,841 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:41:56,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:41:56,842 INFO L82 PathProgramCache]: Analyzing trace with hash -1532432110, now seen corresponding path program 1 times [2019-11-07 01:41:56,842 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:41:56,842 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964008524] [2019-11-07 01:41:56,843 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:41:56,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:41:57,046 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:41:57,046 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964008524] [2019-11-07 01:41:57,047 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 01:41:57,047 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-07 01:41:57,047 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044832246] [2019-11-07 01:41:57,048 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 01:41:57,048 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:41:57,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 01:41:57,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 01:41:57,049 INFO L87 Difference]: Start difference. First operand 603 states and 1113 transitions. Second operand 3 states. [2019-11-07 01:41:57,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:41:57,999 INFO L93 Difference]: Finished difference Result 1793 states and 3375 transitions. [2019-11-07 01:41:57,999 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 01:41:58,000 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 161 [2019-11-07 01:41:58,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:41:58,009 INFO L225 Difference]: With dead ends: 1793 [2019-11-07 01:41:58,009 INFO L226 Difference]: Without dead ends: 1195 [2019-11-07 01:41:58,012 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 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 01:41:58,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1195 states. [2019-11-07 01:41:58,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1195 to 1195. [2019-11-07 01:41:58,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1195 states. [2019-11-07 01:41:58,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1195 states to 1195 states and 2084 transitions. [2019-11-07 01:41:58,059 INFO L78 Accepts]: Start accepts. Automaton has 1195 states and 2084 transitions. Word has length 161 [2019-11-07 01:41:58,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:41:58,060 INFO L462 AbstractCegarLoop]: Abstraction has 1195 states and 2084 transitions. [2019-11-07 01:41:58,060 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 01:41:58,060 INFO L276 IsEmpty]: Start isEmpty. Operand 1195 states and 2084 transitions. [2019-11-07 01:41:58,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2019-11-07 01:41:58,068 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:41:58,068 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:41:58,068 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:41:58,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:41:58,069 INFO L82 PathProgramCache]: Analyzing trace with hash -627084125, now seen corresponding path program 1 times [2019-11-07 01:41:58,069 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:41:58,070 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959513028] [2019-11-07 01:41:58,070 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:41:58,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:41:58,349 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:41:58,349 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959513028] [2019-11-07 01:41:58,350 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 01:41:58,350 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-07 01:41:58,351 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276891372] [2019-11-07 01:41:58,351 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 01:41:58,352 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:41:58,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 01:41:58,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 01:41:58,353 INFO L87 Difference]: Start difference. First operand 1195 states and 2084 transitions. Second operand 3 states. [2019-11-07 01:41:59,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:41:59,341 INFO L93 Difference]: Finished difference Result 3571 states and 6400 transitions. [2019-11-07 01:41:59,344 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 01:41:59,344 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 181 [2019-11-07 01:41:59,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:41:59,361 INFO L225 Difference]: With dead ends: 3571 [2019-11-07 01:41:59,362 INFO L226 Difference]: Without dead ends: 2381 [2019-11-07 01:41:59,366 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 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 01:41:59,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2381 states. [2019-11-07 01:41:59,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2381 to 2381. [2019-11-07 01:41:59,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2381 states. [2019-11-07 01:41:59,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2381 states to 2381 states and 4191 transitions. [2019-11-07 01:41:59,453 INFO L78 Accepts]: Start accepts. Automaton has 2381 states and 4191 transitions. Word has length 181 [2019-11-07 01:41:59,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:41:59,453 INFO L462 AbstractCegarLoop]: Abstraction has 2381 states and 4191 transitions. [2019-11-07 01:41:59,453 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 01:41:59,454 INFO L276 IsEmpty]: Start isEmpty. Operand 2381 states and 4191 transitions. [2019-11-07 01:41:59,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2019-11-07 01:41:59,464 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:41:59,464 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:41:59,464 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:41:59,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:41:59,465 INFO L82 PathProgramCache]: Analyzing trace with hash 188197188, now seen corresponding path program 1 times [2019-11-07 01:41:59,465 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:41:59,465 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931669911] [2019-11-07 01:41:59,465 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:41:59,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:41:59,652 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 82 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-07 01:41:59,654 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931669911] [2019-11-07 01:41:59,654 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1094281177] [2019-11-07 01:41:59,654 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 01:41:59,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:41:59,918 INFO L256 TraceCheckSpWp]: Trace formula consists of 1066 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-07 01:41:59,940 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:42:00,079 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2019-11-07 01:42:00,079 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:42:00,244 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 82 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-07 01:42:00,245 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 01:42:00,245 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 11 [2019-11-07 01:42:00,245 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750884674] [2019-11-07 01:42:00,246 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-07 01:42:00,246 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:42:00,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-07 01:42:00,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2019-11-07 01:42:00,247 INFO L87 Difference]: Start difference. First operand 2381 states and 4191 transitions. Second operand 5 states. [2019-11-07 01:42:01,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:42:01,539 INFO L93 Difference]: Finished difference Result 6967 states and 13483 transitions. [2019-11-07 01:42:01,539 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-07 01:42:01,540 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 237 [2019-11-07 01:42:01,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:42:01,581 INFO L225 Difference]: With dead ends: 6967 [2019-11-07 01:42:01,581 INFO L226 Difference]: Without dead ends: 4591 [2019-11-07 01:42:01,591 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 481 GetRequests, 469 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2019-11-07 01:42:01,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4591 states. [2019-11-07 01:42:01,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4591 to 4527. [2019-11-07 01:42:01,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4527 states. [2019-11-07 01:42:01,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4527 states to 4527 states and 7991 transitions. [2019-11-07 01:42:01,762 INFO L78 Accepts]: Start accepts. Automaton has 4527 states and 7991 transitions. Word has length 237 [2019-11-07 01:42:01,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:42:01,762 INFO L462 AbstractCegarLoop]: Abstraction has 4527 states and 7991 transitions. [2019-11-07 01:42:01,763 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-07 01:42:01,763 INFO L276 IsEmpty]: Start isEmpty. Operand 4527 states and 7991 transitions. [2019-11-07 01:42:01,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2019-11-07 01:42:01,783 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:42:01,783 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:42:01,989 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:42:01,989 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:42:01,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:42:01,990 INFO L82 PathProgramCache]: Analyzing trace with hash 1363875243, now seen corresponding path program 1 times [2019-11-07 01:42:01,991 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:42:01,991 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15067] [2019-11-07 01:42:01,991 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:42:02,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:42:02,616 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 95 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:42:02,616 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15067] [2019-11-07 01:42:02,616 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1222307400] [2019-11-07 01:42:02,617 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 01:42:02,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:42:02,924 INFO L256 TraceCheckSpWp]: Trace formula consists of 1061 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-07 01:42:02,939 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:42:03,035 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2019-11-07 01:42:03,035 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:42:03,302 WARN L191 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 38 [2019-11-07 01:42:03,362 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 01:42:03,363 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 01:42:03,364 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 01:42:03,365 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 01:42:03,368 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 01:42:03,368 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 01:42:03,382 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 01:42:03,383 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 01:42:03,384 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 01:42:03,385 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 01:42:03,388 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 01:42:03,392 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 01:42:03,393 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 01:42:03,394 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 01:42:03,395 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 01:42:03,397 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 01:42:03,399 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 01:42:03,400 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 01:42:03,401 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 01:42:03,405 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 01:42:03,406 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 01:42:03,407 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 01:42:03,407 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 01:42:03,419 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 01:42:03,421 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 01:42:03,422 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 01:42:03,423 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 01:42:03,535 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 83 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-07 01:42:03,536 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 01:42:03,536 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 11 [2019-11-07 01:42:03,536 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590667852] [2019-11-07 01:42:03,537 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-07 01:42:03,537 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:42:03,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-07 01:42:03,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2019-11-07 01:42:03,538 INFO L87 Difference]: Start difference. First operand 4527 states and 7991 transitions. Second operand 5 states. [2019-11-07 01:42:04,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:42:04,914 INFO L93 Difference]: Finished difference Result 11335 states and 20858 transitions. [2019-11-07 01:42:04,914 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-07 01:42:04,915 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 238 [2019-11-07 01:42:04,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:42:04,961 INFO L225 Difference]: With dead ends: 11335 [2019-11-07 01:42:04,961 INFO L226 Difference]: Without dead ends: 6813 [2019-11-07 01:42:04,979 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 484 GetRequests, 472 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2019-11-07 01:42:04,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6813 states. [2019-11-07 01:42:05,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6813 to 6761. [2019-11-07 01:42:05,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6761 states. [2019-11-07 01:42:05,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6761 states to 6761 states and 11040 transitions. [2019-11-07 01:42:05,220 INFO L78 Accepts]: Start accepts. Automaton has 6761 states and 11040 transitions. Word has length 238 [2019-11-07 01:42:05,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:42:05,220 INFO L462 AbstractCegarLoop]: Abstraction has 6761 states and 11040 transitions. [2019-11-07 01:42:05,220 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-07 01:42:05,221 INFO L276 IsEmpty]: Start isEmpty. Operand 6761 states and 11040 transitions. [2019-11-07 01:42:05,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2019-11-07 01:42:05,256 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:42:05,256 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:42:05,469 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:42:05,469 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:42:05,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:42:05,470 INFO L82 PathProgramCache]: Analyzing trace with hash 715321556, now seen corresponding path program 1 times [2019-11-07 01:42:05,470 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:42:05,470 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280561525] [2019-11-07 01:42:05,471 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:42:05,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:42:05,794 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 109 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:42:05,795 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280561525] [2019-11-07 01:42:05,795 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2101214716] [2019-11-07 01:42:05,795 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 01:42:06,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:42:06,152 INFO L256 TraceCheckSpWp]: Trace formula consists of 1074 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-07 01:42:06,161 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:42:06,267 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 109 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:42:06,268 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:42:06,484 WARN L191 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 40 [2019-11-07 01:42:06,528 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 01:42:06,529 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 01:42:06,530 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 01:42:06,530 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 01:42:06,531 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 01:42:06,532 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 01:42:06,533 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 01:42:06,533 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 01:42:06,534 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 01:42:06,858 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 109 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:42:06,858 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [656207627] [2019-11-07 01:42:06,915 INFO L159 IcfgInterpreter]: Started Sifa with 153 locations of interest [2019-11-07 01:42:06,915 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:42:06,929 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:42:06,937 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:42:06,937 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:42:07,288 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 210 for LOIs [2019-11-07 01:42:08,606 WARN L191 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 226 DAG size of output: 223 [2019-11-07 01:42:09,488 WARN L191 SmtUtils]: Spent 247.00 ms on a formula simplification that was a NOOP. DAG size: 226 [2019-11-07 01:42:09,658 WARN L191 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 226 [2019-11-07 01:42:09,864 WARN L191 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 227 DAG size of output: 227 [2019-11-07 01:42:10,053 WARN L191 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 259 DAG size of output: 259 [2019-11-07 01:42:10,755 WARN L191 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 373 DAG size of output: 373 [2019-11-07 01:42:11,196 WARN L191 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 373 DAG size of output: 373 [2019-11-07 01:42:11,439 WARN L191 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 383 DAG size of output: 383 [2019-11-07 01:42:11,874 WARN L191 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 383 DAG size of output: 383 [2019-11-07 01:42:12,095 INFO L197 IcfgInterpreter]: Interpreting procedure calculate_output with input of size 172 for LOIs [2019-11-07 01:42:12,442 WARN L191 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 129 [2019-11-07 01:42:12,547 WARN L191 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2019-11-07 01:42:13,174 WARN L191 SmtUtils]: Spent 505.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 143 [2019-11-07 01:42:13,446 WARN L191 SmtUtils]: Spent 271.00 ms on a formula simplification that was a NOOP. DAG size: 143 [2019-11-07 01:42:14,769 WARN L191 SmtUtils]: Spent 1.10 s on a formula simplification. DAG size of input: 299 DAG size of output: 180 [2019-11-07 01:42:15,282 WARN L191 SmtUtils]: Spent 511.00 ms on a formula simplification that was a NOOP. DAG size: 180 [2019-11-07 01:42:18,287 WARN L191 SmtUtils]: Spent 2.37 s on a formula simplification. DAG size of input: 467 DAG size of output: 195 [2019-11-07 01:42:19,137 WARN L191 SmtUtils]: Spent 848.00 ms on a formula simplification that was a NOOP. DAG size: 195