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_label32.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 01:43:51,775 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2019-10-15 01:43:51,864 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 01:43:51,865 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 01:43:51,865 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 01:43:51,866 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 01:43:51,897 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 01:43:51,897 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 01:43:51,898 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 01:43:51,899 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 01:43:51,899 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 01:43:51,899 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 01:43:51,899 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 01:43:51,900 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 01:43:51,900 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 01:43:51,900 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 01:43:51,900 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 01:43:51,900 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 01:43:51,901 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 01:43:51,901 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 01:43:51,901 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 01:43:51,901 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 01:43:51,901 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 01:43:51,902 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 01:43:51,902 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 01:43:51,902 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 01:43:51,902 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 01:43:51,902 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:43:51,903 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 01:43:51,903 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 01:43:51,903 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 01:43:51,903 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 01:43:51,903 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 01:43:51,904 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 01:43:51,904 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 01:43:52,222 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 01:43:52,246 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 01:43:52,250 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 01:43:52,251 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 01:43:52,252 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 01:43:52,253 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label32.c [2019-10-15 01:43:52,323 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/044d3630c/3921b1c88db749db8641172ab00b7d73/FLAG47686c9b4 [2019-10-15 01:43:53,010 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 01:43:53,011 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem03_label32.c [2019-10-15 01:43:53,030 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/044d3630c/3921b1c88db749db8641172ab00b7d73/FLAG47686c9b4 [2019-10-15 01:43:53,188 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/044d3630c/3921b1c88db749db8641172ab00b7d73 [2019-10-15 01:43:53,198 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 01:43:53,200 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 01:43:53,201 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 01:43:53,201 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 01:43:53,207 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 01:43:53,208 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:43:53" (1/1) ... [2019-10-15 01:43:53,212 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5645a496 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:43:53, skipping insertion in model container [2019-10-15 01:43:53,212 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:43:53" (1/1) ... [2019-10-15 01:43:53,221 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 01:43:53,309 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 01:43:54,055 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:43:54,062 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 01:43:54,376 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:43:54,403 INFO L192 MainTranslator]: Completed translation [2019-10-15 01:43:54,403 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:43:54 WrapperNode [2019-10-15 01:43:54,404 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 01:43:54,405 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 01:43:54,405 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 01:43:54,405 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 01:43:54,422 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:43:54" (1/1) ... [2019-10-15 01:43:54,422 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:43:54" (1/1) ... [2019-10-15 01:43:54,482 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:43:54" (1/1) ... [2019-10-15 01:43:54,483 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:43:54" (1/1) ... [2019-10-15 01:43:54,584 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:43:54" (1/1) ... [2019-10-15 01:43:54,614 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:43:54" (1/1) ... [2019-10-15 01:43:54,631 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:43:54" (1/1) ... [2019-10-15 01:43:54,647 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 01:43:54,648 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 01:43:54,648 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 01:43:54,648 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 01:43:54,649 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:43:54" (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 01:43:54,716 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 01:43:54,717 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 01:43:54,717 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-15 01:43:54,717 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 01:43:54,717 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-15 01:43:54,718 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 01:43:54,718 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 01:43:54,719 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-15 01:43:54,719 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 01:43:54,720 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 01:43:54,720 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 01:43:57,898 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 01:43:57,898 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-15 01:43:57,900 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:43:57 BoogieIcfgContainer [2019-10-15 01:43:57,900 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 01:43:57,901 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 01:43:57,901 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 01:43:57,905 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 01:43:57,905 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 01:43:53" (1/3) ... [2019-10-15 01:43:57,906 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@379b8ef1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:43:57, skipping insertion in model container [2019-10-15 01:43:57,907 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:43:54" (2/3) ... [2019-10-15 01:43:57,907 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@379b8ef1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:43:57, skipping insertion in model container [2019-10-15 01:43:57,907 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:43:57" (3/3) ... [2019-10-15 01:43:57,909 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem03_label32.c [2019-10-15 01:43:57,920 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 01:43:57,930 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 01:43:57,943 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 01:43:57,971 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 01:43:57,972 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 01:43:57,972 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 01:43:57,972 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 01:43:57,972 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 01:43:57,972 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 01:43:57,973 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 01:43:57,973 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 01:43:57,998 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states. [2019-10-15 01:43:58,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2019-10-15 01:43:58,012 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:43:58,013 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 01:43:58,015 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:43:58,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:43:58,021 INFO L82 PathProgramCache]: Analyzing trace with hash 136475430, now seen corresponding path program 1 times [2019-10-15 01:43:58,031 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:43:58,031 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422708663] [2019-10-15 01:43:58,031 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:43:58,032 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:43:58,032 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:43:58,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:43:58,799 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 01:43:58,800 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422708663] [2019-10-15 01:43:58,801 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:43:58,801 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 01:43:58,802 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085158689] [2019-10-15 01:43:58,810 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:43:58,811 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:43:58,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:43:58,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:43:58,841 INFO L87 Difference]: Start difference. First operand 158 states. Second operand 3 states. [2019-10-15 01:43:59,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:43:59,929 INFO L93 Difference]: Finished difference Result 462 states and 886 transitions. [2019-10-15 01:43:59,930 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:43:59,931 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 149 [2019-10-15 01:43:59,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:43:59,952 INFO L225 Difference]: With dead ends: 462 [2019-10-15 01:43:59,953 INFO L226 Difference]: Without dead ends: 301 [2019-10-15 01:43:59,957 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 2 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 01:43:59,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2019-10-15 01:44:00,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 301. [2019-10-15 01:44:00,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 301 states. [2019-10-15 01:44:00,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 534 transitions. [2019-10-15 01:44:00,035 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 534 transitions. Word has length 149 [2019-10-15 01:44:00,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:44:00,037 INFO L462 AbstractCegarLoop]: Abstraction has 301 states and 534 transitions. [2019-10-15 01:44:00,037 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:44:00,037 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 534 transitions. [2019-10-15 01:44:00,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2019-10-15 01:44:00,042 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:44:00,043 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 01:44:00,043 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:44:00,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:44:00,044 INFO L82 PathProgramCache]: Analyzing trace with hash 558845373, now seen corresponding path program 1 times [2019-10-15 01:44:00,044 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:44:00,044 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266195374] [2019-10-15 01:44:00,044 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:44:00,044 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:44:00,045 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:44:00,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:44:00,226 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 01:44:00,227 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266195374] [2019-10-15 01:44:00,227 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:44:00,227 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-15 01:44:00,228 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782385140] [2019-10-15 01:44:00,231 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 01:44:00,231 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:44:00,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 01:44:00,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-15 01:44:00,232 INFO L87 Difference]: Start difference. First operand 301 states and 534 transitions. Second operand 6 states. [2019-10-15 01:44:01,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:44:01,840 INFO L93 Difference]: Finished difference Result 927 states and 1699 transitions. [2019-10-15 01:44:01,844 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-15 01:44:01,844 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 158 [2019-10-15 01:44:01,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:44:01,852 INFO L225 Difference]: With dead ends: 927 [2019-10-15 01:44:01,852 INFO L226 Difference]: Without dead ends: 631 [2019-10-15 01:44:01,855 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 01:44:01,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 631 states. [2019-10-15 01:44:01,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 631 to 603. [2019-10-15 01:44:01,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 603 states. [2019-10-15 01:44:01,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 603 states to 603 states and 1057 transitions. [2019-10-15 01:44:01,930 INFO L78 Accepts]: Start accepts. Automaton has 603 states and 1057 transitions. Word has length 158 [2019-10-15 01:44:01,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:44:01,931 INFO L462 AbstractCegarLoop]: Abstraction has 603 states and 1057 transitions. [2019-10-15 01:44:01,931 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 01:44:01,931 INFO L276 IsEmpty]: Start isEmpty. Operand 603 states and 1057 transitions. [2019-10-15 01:44:01,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2019-10-15 01:44:01,938 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:44:01,939 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 01:44:01,939 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:44:01,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:44:01,940 INFO L82 PathProgramCache]: Analyzing trace with hash -1532426478, now seen corresponding path program 1 times [2019-10-15 01:44:01,940 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:44:01,940 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575840289] [2019-10-15 01:44:01,940 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:44:01,941 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:44:01,941 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:44:02,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:44:02,181 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 01:44:02,181 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575840289] [2019-10-15 01:44:02,182 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:44:02,182 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 01:44:02,183 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146581718] [2019-10-15 01:44:02,184 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:44:02,184 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:44:02,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:44:02,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:44:02,185 INFO L87 Difference]: Start difference. First operand 603 states and 1057 transitions. Second operand 3 states. [2019-10-15 01:44:03,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:44:03,184 INFO L93 Difference]: Finished difference Result 1797 states and 3229 transitions. [2019-10-15 01:44:03,186 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:44:03,186 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 161 [2019-10-15 01:44:03,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:44:03,200 INFO L225 Difference]: With dead ends: 1797 [2019-10-15 01:44:03,200 INFO L226 Difference]: Without dead ends: 1199 [2019-10-15 01:44:03,203 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 01:44:03,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1199 states. [2019-10-15 01:44:03,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1199 to 1199. [2019-10-15 01:44:03,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1199 states. [2019-10-15 01:44:03,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1199 states to 1199 states and 2080 transitions. [2019-10-15 01:44:03,296 INFO L78 Accepts]: Start accepts. Automaton has 1199 states and 2080 transitions. Word has length 161 [2019-10-15 01:44:03,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:44:03,297 INFO L462 AbstractCegarLoop]: Abstraction has 1199 states and 2080 transitions. [2019-10-15 01:44:03,297 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:44:03,300 INFO L276 IsEmpty]: Start isEmpty. Operand 1199 states and 2080 transitions. [2019-10-15 01:44:03,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2019-10-15 01:44:03,312 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:44:03,313 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 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] [2019-10-15 01:44:03,313 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:44:03,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:44:03,314 INFO L82 PathProgramCache]: Analyzing trace with hash -1729519167, now seen corresponding path program 1 times [2019-10-15 01:44:03,314 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:44:03,314 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000540024] [2019-10-15 01:44:03,315 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:44:03,315 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:44:03,315 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:44:03,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:44:03,549 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 33 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:44:03,549 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000540024] [2019-10-15 01:44:03,549 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318544827] [2019-10-15 01:44:03,550 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 01:44:03,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:44:03,811 INFO L256 TraceCheckSpWp]: Trace formula consists of 1048 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-15 01:44:03,826 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:44:03,955 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-10-15 01:44:03,955 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:44:04,048 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-10-15 01:44:04,050 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 01:44:04,051 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6] total 7 [2019-10-15 01:44:04,051 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245863907] [2019-10-15 01:44:04,052 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:44:04,052 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:44:04,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:44:04,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-15 01:44:04,053 INFO L87 Difference]: Start difference. First operand 1199 states and 2080 transitions. Second operand 3 states. [2019-10-15 01:44:05,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:44:05,098 INFO L93 Difference]: Finished difference Result 3583 states and 6440 transitions. [2019-10-15 01:44:05,098 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:44:05,098 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 178 [2019-10-15 01:44:05,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:44:05,116 INFO L225 Difference]: With dead ends: 3583 [2019-10-15 01:44:05,116 INFO L226 Difference]: Without dead ends: 2389 [2019-10-15 01:44:05,120 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 361 GetRequests, 354 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-15 01:44:05,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2389 states. [2019-10-15 01:44:05,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2389 to 2389. [2019-10-15 01:44:05,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2389 states. [2019-10-15 01:44:05,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2389 states to 2389 states and 4009 transitions. [2019-10-15 01:44:05,208 INFO L78 Accepts]: Start accepts. Automaton has 2389 states and 4009 transitions. Word has length 178 [2019-10-15 01:44:05,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:44:05,209 INFO L462 AbstractCegarLoop]: Abstraction has 2389 states and 4009 transitions. [2019-10-15 01:44:05,209 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:44:05,209 INFO L276 IsEmpty]: Start isEmpty. Operand 2389 states and 4009 transitions. [2019-10-15 01:44:05,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2019-10-15 01:44:05,219 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:44:05,220 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:44:05,424 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:44:05,425 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:44:05,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:44:05,425 INFO L82 PathProgramCache]: Analyzing trace with hash -561574442, now seen corresponding path program 1 times [2019-10-15 01:44:05,425 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:44:05,425 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874621244] [2019-10-15 01:44:05,426 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:44:05,426 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:44:05,426 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:44:05,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:44:05,589 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 38 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:44:05,590 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874621244] [2019-10-15 01:44:05,591 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2133317631] [2019-10-15 01:44:05,591 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 01:44:05,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:44:05,808 INFO L256 TraceCheckSpWp]: Trace formula consists of 1039 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-15 01:44:05,821 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:44:05,899 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-10-15 01:44:05,899 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:44:05,980 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 28 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-15 01:44:05,981 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:44:05,981 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 10 [2019-10-15 01:44:05,981 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554487951] [2019-10-15 01:44:05,982 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 01:44:05,983 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:44:05,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 01:44:05,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2019-10-15 01:44:05,985 INFO L87 Difference]: Start difference. First operand 2389 states and 4009 transitions. Second operand 5 states. [2019-10-15 01:44:07,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:44:07,280 INFO L93 Difference]: Finished difference Result 7321 states and 13207 transitions. [2019-10-15 01:44:07,280 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-15 01:44:07,280 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 183 [2019-10-15 01:44:07,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:44:07,319 INFO L225 Difference]: With dead ends: 7321 [2019-10-15 01:44:07,320 INFO L226 Difference]: Without dead ends: 4937 [2019-10-15 01:44:07,328 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 374 GetRequests, 363 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 01:44:07,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4937 states. [2019-10-15 01:44:07,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4937 to 4867. [2019-10-15 01:44:07,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4867 states. [2019-10-15 01:44:07,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4867 states to 4867 states and 8357 transitions. [2019-10-15 01:44:07,507 INFO L78 Accepts]: Start accepts. Automaton has 4867 states and 8357 transitions. Word has length 183 [2019-10-15 01:44:07,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:44:07,507 INFO L462 AbstractCegarLoop]: Abstraction has 4867 states and 8357 transitions. [2019-10-15 01:44:07,507 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 01:44:07,507 INFO L276 IsEmpty]: Start isEmpty. Operand 4867 states and 8357 transitions. [2019-10-15 01:44:07,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2019-10-15 01:44:07,525 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:44:07,526 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:44:07,730 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:44:07,730 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:44:07,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:44:07,731 INFO L82 PathProgramCache]: Analyzing trace with hash -733573143, now seen corresponding path program 1 times [2019-10-15 01:44:07,731 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:44:07,731 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129234605] [2019-10-15 01:44:07,732 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:44:07,732 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:44:07,732 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:44:07,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:44:07,917 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 56 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:44:07,918 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129234605] [2019-10-15 01:44:07,918 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [83777421] [2019-10-15 01:44:07,918 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 01:44:08,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:44:08,363 INFO L256 TraceCheckSpWp]: Trace formula consists of 1043 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-15 01:44:08,374 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:44:08,409 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 56 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:44:08,410 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:44:08,484 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 56 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:44:08,484 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [169168347] [2019-10-15 01:44:08,549 INFO L162 IcfgInterpreter]: Started Sifa with 153 locations of interest [2019-10-15 01:44:08,549 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:44:08,558 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:44:08,569 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:44:08,570 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:44:09,288 WARN L191 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 182 [2019-10-15 01:44:09,420 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 206 for LOIs [2019-10-15 01:44:09,729 WARN L191 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 298 [2019-10-15 01:44:10,031 WARN L191 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 304 [2019-10-15 01:44:11,560 WARN L191 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 290 DAG size of output: 290 [2019-10-15 01:44:13,696 WARN L191 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 248 DAG size of output: 248 [2019-10-15 01:44:14,404 WARN L191 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 361 [2019-10-15 01:44:14,516 WARN L191 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 361 [2019-10-15 01:44:14,718 WARN L191 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 365 DAG size of output: 363 [2019-10-15 01:44:14,848 WARN L191 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 364 [2019-10-15 01:44:14,987 WARN L191 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 364 [2019-10-15 01:44:15,967 WARN L191 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 251 DAG size of output: 251 [2019-10-15 01:44:16,652 WARN L191 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 361 [2019-10-15 01:44:16,826 WARN L191 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 362 DAG size of output: 362 [2019-10-15 01:44:16,940 WARN L191 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 368 DAG size of output: 366 [2019-10-15 01:44:17,088 WARN L191 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 364 [2019-10-15 01:44:17,261 WARN L191 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 365 DAG size of output: 365 [2019-10-15 01:44:18,362 WARN L191 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 369 [2019-10-15 01:44:18,842 WARN L191 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 377 DAG size of output: 374 [2019-10-15 01:44:19,348 WARN L191 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 251 DAG size of output: 251 [2019-10-15 01:44:20,120 WARN L191 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 225 DAG size of output: 225 [2019-10-15 01:44:20,927 INFO L199 IcfgInterpreter]: Interpreting procedure calculate_output with input of size 170 for LOIs [2019-10-15 01:44:21,389 WARN L191 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 123 [2019-10-15 01:44:22,131 WARN L191 SmtUtils]: Spent 473.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 137 [2019-10-15 01:44:22,302 WARN L191 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 137 [2019-10-15 01:44:22,480 WARN L191 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2019-10-15 01:44:23,205 WARN L191 SmtUtils]: Spent 500.00 ms on a formula simplification. DAG size of input: 307 DAG size of output: 144 [2019-10-15 01:44:23,454 WARN L191 SmtUtils]: Spent 247.00 ms on a formula simplification that was a NOOP. DAG size: 144 [2019-10-15 01:44:23,686 WARN L191 SmtUtils]: Spent 230.00 ms on a formula simplification that was a NOOP. DAG size: 176 [2019-10-15 01:44:24,574 WARN L191 SmtUtils]: Spent 652.00 ms on a formula simplification. DAG size of input: 343 DAG size of output: 148 [2019-10-15 01:44:24,887 WARN L191 SmtUtils]: Spent 311.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2019-10-15 01:44:25,152 WARN L191 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 182 [2019-10-15 01:44:25,702 WARN L191 SmtUtils]: Spent 346.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 148 [2019-10-15 01:44:25,953 WARN L191 SmtUtils]: Spent 249.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2019-10-15 01:44:26,258 WARN L191 SmtUtils]: Spent 303.00 ms on a formula simplification that was a NOOP. DAG size: 190