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_label13.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 01:43:26,898 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2019-10-15 01:43:26,930 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 01:43:26,931 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 01:43:26,931 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 01:43:26,933 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 01:43:26,933 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 01:43:26,934 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 01:43:26,936 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 01:43:26,938 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 01:43:26,939 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 01:43:26,940 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 01:43:26,941 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 01:43:26,942 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 01:43:26,944 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 01:43:26,952 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 01:43:26,953 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 01:43:26,954 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 01:43:26,955 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 [2019-10-15 01:43:26,977 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 01:43:26,978 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 01:43:26,979 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 01:43:26,979 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 01:43:26,979 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 01:43:26,979 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 01:43:26,980 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 01:43:26,980 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 01:43:26,980 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 01:43:26,980 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 01:43:26,980 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 01:43:26,981 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 01:43:26,981 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 01:43:26,981 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 01:43:26,981 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 01:43:26,981 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 01:43:26,982 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 01:43:26,982 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 01:43:26,982 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 01:43:26,982 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 01:43:26,982 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 01:43:26,982 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:43:26,983 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 01:43:26,983 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 01:43:26,983 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 01:43:26,983 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 01:43:26,984 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 01:43:26,984 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 01:43:26,984 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 [2019-10-15 01:43:27,254 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 01:43:27,269 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 01:43:27,276 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 01:43:27,278 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 01:43:27,278 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 01:43:27,279 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label13.c [2019-10-15 01:43:27,363 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cd86507e2/47e6af441f8149c6a2036dc71fc80cc9/FLAGc6dd2aeb4 [2019-10-15 01:43:28,028 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 01:43:28,029 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem03_label13.c [2019-10-15 01:43:28,045 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cd86507e2/47e6af441f8149c6a2036dc71fc80cc9/FLAGc6dd2aeb4 [2019-10-15 01:43:28,277 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cd86507e2/47e6af441f8149c6a2036dc71fc80cc9 [2019-10-15 01:43:28,286 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 01:43:28,287 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 01:43:28,291 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 01:43:28,292 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 01:43:28,296 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 01:43:28,297 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:43:28" (1/1) ... [2019-10-15 01:43:28,300 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@79c54825 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:43:28, skipping insertion in model container [2019-10-15 01:43:28,300 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:43:28" (1/1) ... [2019-10-15 01:43:28,309 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 01:43:28,397 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 01:43:29,158 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:43:29,171 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 01:43:29,445 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:43:29,467 INFO L192 MainTranslator]: Completed translation [2019-10-15 01:43:29,468 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:43:29 WrapperNode [2019-10-15 01:43:29,468 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 01:43:29,469 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 01:43:29,469 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 01:43:29,469 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 01:43:29,484 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:43:29" (1/1) ... [2019-10-15 01:43:29,485 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:43:29" (1/1) ... [2019-10-15 01:43:29,513 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:43:29" (1/1) ... [2019-10-15 01:43:29,513 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:43:29" (1/1) ... [2019-10-15 01:43:29,572 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:43:29" (1/1) ... [2019-10-15 01:43:29,600 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:43:29" (1/1) ... [2019-10-15 01:43:29,612 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:43:29" (1/1) ... [2019-10-15 01:43:29,622 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 01:43:29,623 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 01:43:29,623 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 01:43:29,623 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 01:43:29,624 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:43:29" (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 [2019-10-15 01:43:29,683 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 01:43:29,684 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 01:43:29,684 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-15 01:43:29,684 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 01:43:29,684 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-15 01:43:29,684 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 01:43:29,685 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 01:43:29,685 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-15 01:43:29,685 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 01:43:29,685 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 01:43:29,686 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 01:43:32,713 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 01:43:32,716 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-15 01:43:32,718 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:43:32 BoogieIcfgContainer [2019-10-15 01:43:32,718 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 01:43:32,719 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 01:43:32,719 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 01:43:32,722 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 01:43:32,723 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 01:43:28" (1/3) ... [2019-10-15 01:43:32,724 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7bf7aba2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:43:32, skipping insertion in model container [2019-10-15 01:43:32,724 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:43:29" (2/3) ... [2019-10-15 01:43:32,725 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7bf7aba2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:43:32, skipping insertion in model container [2019-10-15 01:43:32,725 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:43:32" (3/3) ... [2019-10-15 01:43:32,727 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem03_label13.c [2019-10-15 01:43:32,737 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 01:43:32,745 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 01:43:32,758 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 01:43:32,789 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 01:43:32,789 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 01:43:32,789 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 01:43:32,790 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 01:43:32,790 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 01:43:32,790 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 01:43:32,790 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 01:43:32,790 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 01:43:32,815 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states. [2019-10-15 01:43:32,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2019-10-15 01:43:32,830 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:43:32,831 INFO L380 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] [2019-10-15 01:43:32,833 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:43:32,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:43:32,841 INFO L82 PathProgramCache]: Analyzing trace with hash 136466726, now seen corresponding path program 1 times [2019-10-15 01:43:32,852 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:43:32,853 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527890259] [2019-10-15 01:43:32,853 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:43:32,854 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:43:32,854 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:43:33,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:43:33,554 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:43:33,555 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527890259] [2019-10-15 01:43:33,556 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:43:33,556 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 01:43:33,557 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937397021] [2019-10-15 01:43:33,562 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:43:33,562 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:43:33,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:43:33,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:43:33,579 INFO L87 Difference]: Start difference. First operand 158 states. Second operand 3 states. [2019-10-15 01:43:34,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:43:34,717 INFO L93 Difference]: Finished difference Result 462 states and 886 transitions. [2019-10-15 01:43:34,718 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:43:34,719 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 149 [2019-10-15 01:43:34,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:43:34,748 INFO L225 Difference]: With dead ends: 462 [2019-10-15 01:43:34,748 INFO L226 Difference]: Without dead ends: 301 [2019-10-15 01:43:34,757 INFO L600 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 [2019-10-15 01:43:34,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2019-10-15 01:43:34,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 301. [2019-10-15 01:43:34,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 301 states. [2019-10-15 01:43:34,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 564 transitions. [2019-10-15 01:43:34,833 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 564 transitions. Word has length 149 [2019-10-15 01:43:34,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:43:34,835 INFO L462 AbstractCegarLoop]: Abstraction has 301 states and 564 transitions. [2019-10-15 01:43:34,835 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:43:34,835 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 564 transitions. [2019-10-15 01:43:34,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2019-10-15 01:43:34,840 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:43:34,840 INFO L380 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] [2019-10-15 01:43:34,841 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:43:34,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:43:34,841 INFO L82 PathProgramCache]: Analyzing trace with hash 558836669, now seen corresponding path program 1 times [2019-10-15 01:43:34,842 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:43:34,842 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940531133] [2019-10-15 01:43:34,842 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:43:34,842 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:43:34,842 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:43:34,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:43:35,056 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:43:35,057 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940531133] [2019-10-15 01:43:35,058 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:43:35,058 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-15 01:43:35,058 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003870141] [2019-10-15 01:43:35,061 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 01:43:35,062 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:43:35,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 01:43:35,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-15 01:43:35,062 INFO L87 Difference]: Start difference. First operand 301 states and 564 transitions. Second operand 6 states. [2019-10-15 01:43:36,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:43:36,461 INFO L93 Difference]: Finished difference Result 929 states and 1794 transitions. [2019-10-15 01:43:36,461 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-15 01:43:36,462 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 158 [2019-10-15 01:43:36,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:43:36,468 INFO L225 Difference]: With dead ends: 929 [2019-10-15 01:43:36,469 INFO L226 Difference]: Without dead ends: 633 [2019-10-15 01:43:36,471 INFO L600 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 [2019-10-15 01:43:36,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 633 states. [2019-10-15 01:43:36,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 633 to 603. [2019-10-15 01:43:36,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 603 states. [2019-10-15 01:43:36,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 603 states to 603 states and 1113 transitions. [2019-10-15 01:43:36,537 INFO L78 Accepts]: Start accepts. Automaton has 603 states and 1113 transitions. Word has length 158 [2019-10-15 01:43:36,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:43:36,537 INFO L462 AbstractCegarLoop]: Abstraction has 603 states and 1113 transitions. [2019-10-15 01:43:36,537 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 01:43:36,537 INFO L276 IsEmpty]: Start isEmpty. Operand 603 states and 1113 transitions. [2019-10-15 01:43:36,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2019-10-15 01:43:36,543 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:43:36,544 INFO L380 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] [2019-10-15 01:43:36,544 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:43:36,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:43:36,545 INFO L82 PathProgramCache]: Analyzing trace with hash -1532435182, now seen corresponding path program 1 times [2019-10-15 01:43:36,545 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:43:36,545 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101778583] [2019-10-15 01:43:36,545 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:43:36,545 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:43:36,546 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:43:36,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:43:36,786 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:43:36,786 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101778583] [2019-10-15 01:43:36,786 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:43:36,787 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 01:43:36,788 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683868256] [2019-10-15 01:43:36,789 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:43:36,789 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:43:36,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:43:36,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:43:36,794 INFO L87 Difference]: Start difference. First operand 603 states and 1113 transitions. Second operand 3 states. [2019-10-15 01:43:37,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:43:37,812 INFO L93 Difference]: Finished difference Result 1793 states and 3375 transitions. [2019-10-15 01:43:37,814 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:43:37,814 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 161 [2019-10-15 01:43:37,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:43:37,823 INFO L225 Difference]: With dead ends: 1793 [2019-10-15 01:43:37,824 INFO L226 Difference]: Without dead ends: 1195 [2019-10-15 01:43:37,825 INFO L600 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 [2019-10-15 01:43:37,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1195 states. [2019-10-15 01:43:37,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1195 to 1195. [2019-10-15 01:43:37,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1195 states. [2019-10-15 01:43:37,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1195 states to 1195 states and 2084 transitions. [2019-10-15 01:43:37,910 INFO L78 Accepts]: Start accepts. Automaton has 1195 states and 2084 transitions. Word has length 161 [2019-10-15 01:43:37,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:43:37,911 INFO L462 AbstractCegarLoop]: Abstraction has 1195 states and 2084 transitions. [2019-10-15 01:43:37,912 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:43:37,912 INFO L276 IsEmpty]: Start isEmpty. Operand 1195 states and 2084 transitions. [2019-10-15 01:43:37,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2019-10-15 01:43:37,921 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:43:37,922 INFO L380 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] [2019-10-15 01:43:37,923 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:43:37,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:43:37,923 INFO L82 PathProgramCache]: Analyzing trace with hash -627087197, now seen corresponding path program 1 times [2019-10-15 01:43:37,923 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:43:37,924 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221445177] [2019-10-15 01:43:37,924 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:43:37,924 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:43:37,924 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:43:37,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:43:38,161 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:43:38,162 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221445177] [2019-10-15 01:43:38,162 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:43:38,162 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 01:43:38,163 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431588907] [2019-10-15 01:43:38,163 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:43:38,163 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:43:38,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:43:38,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:43:38,164 INFO L87 Difference]: Start difference. First operand 1195 states and 2084 transitions. Second operand 3 states. [2019-10-15 01:43:39,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:43:39,268 INFO L93 Difference]: Finished difference Result 3569 states and 6418 transitions. [2019-10-15 01:43:39,269 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:43:39,269 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 181 [2019-10-15 01:43:39,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:43:39,287 INFO L225 Difference]: With dead ends: 3569 [2019-10-15 01:43:39,287 INFO L226 Difference]: Without dead ends: 2379 [2019-10-15 01:43:39,291 INFO L600 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 [2019-10-15 01:43:39,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2379 states. [2019-10-15 01:43:39,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2379 to 2379. [2019-10-15 01:43:39,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2379 states. [2019-10-15 01:43:39,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2379 states to 2379 states and 4004 transitions. [2019-10-15 01:43:39,378 INFO L78 Accepts]: Start accepts. Automaton has 2379 states and 4004 transitions. Word has length 181 [2019-10-15 01:43:39,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:43:39,379 INFO L462 AbstractCegarLoop]: Abstraction has 2379 states and 4004 transitions. [2019-10-15 01:43:39,379 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:43:39,379 INFO L276 IsEmpty]: Start isEmpty. Operand 2379 states and 4004 transitions. [2019-10-15 01:43:39,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2019-10-15 01:43:39,388 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:43:39,389 INFO L380 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, 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] [2019-10-15 01:43:39,389 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:43:39,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:43:39,389 INFO L82 PathProgramCache]: Analyzing trace with hash 712250693, now seen corresponding path program 1 times [2019-10-15 01:43:39,390 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:43:39,390 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964226295] [2019-10-15 01:43:39,390 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:43:39,390 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:43:39,390 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:43:39,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:43:39,521 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:43:39,522 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964226295] [2019-10-15 01:43:39,522 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:43:39,522 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-15 01:43:39,522 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335168583] [2019-10-15 01:43:39,523 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 01:43:39,523 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:43:39,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 01:43:39,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-15 01:43:39,524 INFO L87 Difference]: Start difference. First operand 2379 states and 4004 transitions. Second operand 6 states. [2019-10-15 01:43:40,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:43:40,807 INFO L93 Difference]: Finished difference Result 6993 states and 12761 transitions. [2019-10-15 01:43:40,807 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 01:43:40,807 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 186 [2019-10-15 01:43:40,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:43:40,842 INFO L225 Difference]: With dead ends: 6993 [2019-10-15 01:43:40,843 INFO L226 Difference]: Without dead ends: 4619 [2019-10-15 01:43:40,851 INFO L600 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 [2019-10-15 01:43:40,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4619 states. [2019-10-15 01:43:40,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4619 to 4555. [2019-10-15 01:43:40,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4555 states. [2019-10-15 01:43:41,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4555 states to 4555 states and 7055 transitions. [2019-10-15 01:43:41,008 INFO L78 Accepts]: Start accepts. Automaton has 4555 states and 7055 transitions. Word has length 186 [2019-10-15 01:43:41,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:43:41,008 INFO L462 AbstractCegarLoop]: Abstraction has 4555 states and 7055 transitions. [2019-10-15 01:43:41,008 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 01:43:41,009 INFO L276 IsEmpty]: Start isEmpty. Operand 4555 states and 7055 transitions. [2019-10-15 01:43:41,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2019-10-15 01:43:41,025 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:43:41,026 INFO L380 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, 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] [2019-10-15 01:43:41,026 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:43:41,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:43:41,026 INFO L82 PathProgramCache]: Analyzing trace with hash 938378696, now seen corresponding path program 1 times [2019-10-15 01:43:41,027 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:43:41,027 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71854167] [2019-10-15 01:43:41,027 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:43:41,027 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:43:41,027 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:43:41,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:43:41,242 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:43:41,242 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71854167] [2019-10-15 01:43:41,243 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:43:41,243 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-15 01:43:41,243 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678724534] [2019-10-15 01:43:41,244 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 01:43:41,244 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:43:41,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 01:43:41,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-15 01:43:41,245 INFO L87 Difference]: Start difference. First operand 4555 states and 7055 transitions. Second operand 6 states. [2019-10-15 01:43:42,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:43:42,628 INFO L93 Difference]: Finished difference Result 11122 states and 17797 transitions. [2019-10-15 01:43:42,629 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-15 01:43:42,629 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 207 [2019-10-15 01:43:42,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:43:42,670 INFO L225 Difference]: With dead ends: 11122 [2019-10-15 01:43:42,670 INFO L226 Difference]: Without dead ends: 6572 [2019-10-15 01:43:42,685 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-10-15 01:43:42,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6572 states. [2019-10-15 01:43:42,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6572 to 6528. [2019-10-15 01:43:42,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6528 states. [2019-10-15 01:43:42,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6528 states to 6528 states and 9917 transitions. [2019-10-15 01:43:42,901 INFO L78 Accepts]: Start accepts. Automaton has 6528 states and 9917 transitions. Word has length 207 [2019-10-15 01:43:42,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:43:42,902 INFO L462 AbstractCegarLoop]: Abstraction has 6528 states and 9917 transitions. [2019-10-15 01:43:42,902 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 01:43:42,902 INFO L276 IsEmpty]: Start isEmpty. Operand 6528 states and 9917 transitions. [2019-10-15 01:43:42,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2019-10-15 01:43:42,926 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:43:42,927 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:43:42,927 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:43:42,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:43:42,928 INFO L82 PathProgramCache]: Analyzing trace with hash 1573941140, now seen corresponding path program 1 times [2019-10-15 01:43:42,928 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:43:42,928 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792247144] [2019-10-15 01:43:42,929 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:43:42,929 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:43:42,929 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:43:42,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:43:43,186 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 76 proven. 22 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-15 01:43:43,187 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792247144] [2019-10-15 01:43:43,187 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1992867417] [2019-10-15 01:43:43,187 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 [2019-10-15 01:43:43,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:43:43,412 INFO L256 TraceCheckSpWp]: Trace formula consists of 1198 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-15 01:43:43,428 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:43:43,539 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2019-10-15 01:43:43,539 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:43:43,644 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 62 proven. 16 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2019-10-15 01:43:43,645 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:43:43,646 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 10 [2019-10-15 01:43:43,646 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986817749] [2019-10-15 01:43:43,647 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 01:43:43,647 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:43:43,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 01:43:43,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2019-10-15 01:43:43,648 INFO L87 Difference]: Start difference. First operand 6528 states and 9917 transitions. Second operand 5 states. [2019-10-15 01:43:45,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:43:45,177 INFO L93 Difference]: Finished difference Result 18240 states and 29336 transitions. [2019-10-15 01:43:45,178 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-15 01:43:45,178 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 220 [2019-10-15 01:43:45,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:43:45,274 INFO L225 Difference]: With dead ends: 18240 [2019-10-15 01:43:45,274 INFO L226 Difference]: Without dead ends: 11717 [2019-10-15 01:43:45,297 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 448 GetRequests, 437 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2019-10-15 01:43:45,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11717 states. [2019-10-15 01:43:45,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11717 to 11601. [2019-10-15 01:43:45,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11601 states. [2019-10-15 01:43:45,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11601 states to 11601 states and 17968 transitions. [2019-10-15 01:43:45,760 INFO L78 Accepts]: Start accepts. Automaton has 11601 states and 17968 transitions. Word has length 220 [2019-10-15 01:43:45,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:43:45,760 INFO L462 AbstractCegarLoop]: Abstraction has 11601 states and 17968 transitions. [2019-10-15 01:43:45,760 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 01:43:45,760 INFO L276 IsEmpty]: Start isEmpty. Operand 11601 states and 17968 transitions. [2019-10-15 01:43:45,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2019-10-15 01:43:45,803 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:43:45,804 INFO L380 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] [2019-10-15 01:43:46,010 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:43:46,010 INFO L410 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:43:46,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:43:46,011 INFO L82 PathProgramCache]: Analyzing trace with hash 1496195916, now seen corresponding path program 1 times [2019-10-15 01:43:46,011 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:43:46,011 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683414520] [2019-10-15 01:43:46,012 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:43:46,012 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:43:46,012 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:43:46,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:43:46,367 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 95 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:43:46,368 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683414520] [2019-10-15 01:43:46,368 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1750823780] [2019-10-15 01:43:46,368 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 [2019-10-15 01:43:46,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:43:46,723 INFO L256 TraceCheckSpWp]: Trace formula consists of 1050 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-15 01:43:46,744 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:43:46,852 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2019-10-15 01:43:46,853 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:43:47,118 WARN L191 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 37 [2019-10-15 01:43:47,167 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 01:43:47,168 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 01:43:47,170 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 01:43:47,173 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 01:43:47,178 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 01:43:47,259 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 83 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-15 01:43:47,260 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:43:47,260 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 11 [2019-10-15 01:43:47,260 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439955936] [2019-10-15 01:43:47,261 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 01:43:47,261 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:43:47,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 01:43:47,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2019-10-15 01:43:47,262 INFO L87 Difference]: Start difference. First operand 11601 states and 17968 transitions. Second operand 5 states. [2019-10-15 01:43:48,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:43:48,540 INFO L93 Difference]: Finished difference Result 23255 states and 36222 transitions. [2019-10-15 01:43:48,540 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-15 01:43:48,541 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 238 [2019-10-15 01:43:48,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:43:48,603 INFO L225 Difference]: With dead ends: 23255 [2019-10-15 01:43:48,603 INFO L226 Difference]: Without dead ends: 11659 [2019-10-15 01:43:48,633 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 484 GetRequests, 472 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2019-10-15 01:43:48,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11659 states. [2019-10-15 01:43:49,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11659 to 11603. [2019-10-15 01:43:49,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11603 states. [2019-10-15 01:43:49,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11603 states to 11603 states and 17771 transitions. [2019-10-15 01:43:49,058 INFO L78 Accepts]: Start accepts. Automaton has 11603 states and 17771 transitions. Word has length 238 [2019-10-15 01:43:49,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:43:49,059 INFO L462 AbstractCegarLoop]: Abstraction has 11603 states and 17771 transitions. [2019-10-15 01:43:49,059 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 01:43:49,059 INFO L276 IsEmpty]: Start isEmpty. Operand 11603 states and 17771 transitions. [2019-10-15 01:43:49,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2019-10-15 01:43:49,097 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:43:49,098 INFO L380 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] [2019-10-15 01:43:49,311 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:43:49,311 INFO L410 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:43:49,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:43:49,312 INFO L82 PathProgramCache]: Analyzing trace with hash 847642229, now seen corresponding path program 1 times [2019-10-15 01:43:49,312 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:43:49,312 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438111675] [2019-10-15 01:43:49,312 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:43:49,313 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:43:49,313 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:43:49,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:43:49,666 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 109 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:43:49,667 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438111675] [2019-10-15 01:43:49,667 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1112630061] [2019-10-15 01:43:49,667 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 [2019-10-15 01:43:49,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:43:49,946 INFO L256 TraceCheckSpWp]: Trace formula consists of 1063 conjuncts, 13 conjunts are in the unsatisfiable core [2019-10-15 01:43:49,953 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:43:50,076 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 109 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:43:50,076 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:43:50,459 WARN L191 SmtUtils]: Spent 308.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 42 [2019-10-15 01:43:50,521 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 01:43:50,522 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 01:43:50,522 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 01:43:50,523 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 01:43:50,524 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 01:43:50,530 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 01:43:50,771 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 109 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:43:50,772 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [886095668] [2019-10-15 01:43:50,840 INFO L162 IcfgInterpreter]: Started Sifa with 153 locations of interest [2019-10-15 01:43:50,841 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:43:50,848 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:43:50,857 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:43:50,857 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:43:51,708 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 206 for LOIs [2019-10-15 01:43:51,917 WARN L191 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 227 [2019-10-15 01:43:52,052 WARN L191 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 298 [2019-10-15 01:43:52,317 WARN L191 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 304 [2019-10-15 01:43:53,972 WARN L191 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 301 DAG size of output: 301 [2019-10-15 01:43:55,530 WARN L191 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 261 DAG size of output: 261 [2019-10-15 01:43:55,868 WARN L191 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 259 DAG size of output: 259 [2019-10-15 01:43:56,447 WARN L191 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 227 DAG size of output: 227 [2019-10-15 01:43:56,781 WARN L191 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 261 DAG size of output: 261 [2019-10-15 01:43:57,531 WARN L191 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 369 [2019-10-15 01:43:57,636 WARN L191 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 369 [2019-10-15 01:43:57,858 WARN L191 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 373 DAG size of output: 371 [2019-10-15 01:43:57,969 WARN L191 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 370 [2019-10-15 01:43:58,072 WARN L191 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 370 [2019-10-15 01:43:58,323 WARN L191 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 374 DAG size of output: 372