/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.trace.refinement.strategy SIFA_TAIPAN --sifa.abstract.domain CompoundDomain --rcfgbuilder.size.of.a.code.block LoopFreeBlock --sifa.call.summarizer TopInputCallSummarizer --sifa.fluid SizeLimitFluid --sifa.simplification.technique SIMPLIFY_QUICK -i ../../../trunk/examples/svcomp/reducercommutativity/sep05-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-07 04:39:42,463 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-07 04:39:42,466 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-07 04:39:42,477 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-07 04:39:42,478 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-07 04:39:42,479 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-07 04:39:42,480 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-07 04:39:42,482 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-07 04:39:42,484 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-07 04:39:42,485 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-07 04:39:42,485 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-07 04:39:42,487 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-07 04:39:42,487 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-07 04:39:42,488 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-07 04:39:42,489 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-07 04:39:42,490 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-07 04:39:42,491 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-07 04:39:42,492 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-07 04:39:42,493 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-07 04:39:42,499 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-07 04:39:42,500 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-07 04:39:42,501 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-07 04:39:42,502 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-07 04:39:42,508 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-07 04:39:42,512 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-07 04:39:42,525 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-07 04:39:42,528 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-07 04:39:42,529 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-07 04:39:42,530 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-07 04:39:42,552 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-07 04:39:42,553 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-07 04:39:42,555 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-07 04:39:42,555 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-07 04:39:42,555 INFO L138 SettingsManager]: * Use SBE=true [2019-11-07 04:39:42,556 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-07 04:39:42,556 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-07 04:39:42,556 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-07 04:39:42,556 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-07 04:39:42,556 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-07 04:39:42,558 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-07 04:39:42,558 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-07 04:39:42,558 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-07 04:39:42,558 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-07 04:39:42,559 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-07 04:39:42,559 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-07 04:39:42,559 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-07 04:39:42,559 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-07 04:39:42,559 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-07 04:39:42,559 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-07 04:39:42,560 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-07 04:39:42,560 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 04:39:42,560 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-07 04:39:42,560 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-07 04:39:42,560 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-07 04:39:42,561 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-07 04:39:42,561 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-07 04:39:42,561 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-07 04:39:42,561 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> SIFA_TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> CompoundDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> LoopFreeBlock Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Call Summarizer -> TopInputCallSummarizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Fluid -> SizeLimitFluid Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Simplification Technique -> SIMPLIFY_QUICK [2019-11-07 04:39:42,867 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-07 04:39:42,884 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-07 04:39:42,887 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-07 04:39:42,889 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-07 04:39:42,889 INFO L275 PluginConnector]: CDTParser initialized [2019-11-07 04:39:42,890 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/reducercommutativity/sep05-1.i [2019-11-07 04:39:42,943 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2a7332678/39ef7e22a5ca4585b1b11d25e3d49b43/FLAGe64adf149 [2019-11-07 04:39:43,378 INFO L306 CDTParser]: Found 1 translation units. [2019-11-07 04:39:43,379 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/reducercommutativity/sep05-1.i [2019-11-07 04:39:43,385 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2a7332678/39ef7e22a5ca4585b1b11d25e3d49b43/FLAGe64adf149 [2019-11-07 04:39:43,759 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2a7332678/39ef7e22a5ca4585b1b11d25e3d49b43 [2019-11-07 04:39:43,771 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-07 04:39:43,772 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-07 04:39:43,773 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-07 04:39:43,773 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-07 04:39:43,776 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-07 04:39:43,777 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 04:39:43" (1/1) ... [2019-11-07 04:39:43,780 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4b20e7ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:39:43, skipping insertion in model container [2019-11-07 04:39:43,781 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 04:39:43" (1/1) ... [2019-11-07 04:39:43,788 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-07 04:39:43,809 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-07 04:39:43,976 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 04:39:43,986 INFO L188 MainTranslator]: Completed pre-run [2019-11-07 04:39:44,010 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 04:39:44,026 INFO L192 MainTranslator]: Completed translation [2019-11-07 04:39:44,027 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:39:44 WrapperNode [2019-11-07 04:39:44,027 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-07 04:39:44,028 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-07 04:39:44,028 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-07 04:39:44,028 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-07 04:39:44,126 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:39:44" (1/1) ... [2019-11-07 04:39:44,127 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:39:44" (1/1) ... [2019-11-07 04:39:44,134 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:39:44" (1/1) ... [2019-11-07 04:39:44,135 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:39:44" (1/1) ... [2019-11-07 04:39:44,142 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:39:44" (1/1) ... [2019-11-07 04:39:44,153 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:39:44" (1/1) ... [2019-11-07 04:39:44,154 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:39:44" (1/1) ... [2019-11-07 04:39:44,157 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-07 04:39:44,157 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-07 04:39:44,158 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-07 04:39:44,158 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-07 04:39:44,159 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:39:44" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 04:39:44,211 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-07 04:39:44,211 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-07 04:39:44,211 INFO L138 BoogieDeclarations]: Found implementation of procedure sep [2019-11-07 04:39:44,211 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-07 04:39:44,211 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-07 04:39:44,212 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-07 04:39:44,212 INFO L130 BoogieDeclarations]: Found specification of procedure sep [2019-11-07 04:39:44,212 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-07 04:39:44,212 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-07 04:39:44,212 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-07 04:39:44,212 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-07 04:39:44,213 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-07 04:39:44,213 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-07 04:39:44,213 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-07 04:39:44,622 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-07 04:39:44,622 INFO L284 CfgBuilder]: Removed 3 assume(true) statements. [2019-11-07 04:39:44,624 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 04:39:44 BoogieIcfgContainer [2019-11-07 04:39:44,624 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-07 04:39:44,625 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-07 04:39:44,625 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-07 04:39:44,628 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-07 04:39:44,628 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 04:39:43" (1/3) ... [2019-11-07 04:39:44,629 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19ecc79c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 04:39:44, skipping insertion in model container [2019-11-07 04:39:44,629 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:39:44" (2/3) ... [2019-11-07 04:39:44,630 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19ecc79c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 04:39:44, skipping insertion in model container [2019-11-07 04:39:44,630 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 04:39:44" (3/3) ... [2019-11-07 04:39:44,632 INFO L109 eAbstractionObserver]: Analyzing ICFG sep05-1.i [2019-11-07 04:39:44,641 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-07 04:39:44,649 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-07 04:39:44,661 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-07 04:39:44,685 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-07 04:39:44,685 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-07 04:39:44,685 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-07 04:39:44,686 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-07 04:39:44,686 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-07 04:39:44,686 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-07 04:39:44,686 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-07 04:39:44,686 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-07 04:39:44,703 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2019-11-07 04:39:44,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-11-07 04:39:44,709 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:39:44,710 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 04:39:44,712 INFO L410 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:39:44,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:39:44,717 INFO L82 PathProgramCache]: Analyzing trace with hash -1553264816, now seen corresponding path program 1 times [2019-11-07 04:39:44,724 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:39:44,724 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258273442] [2019-11-07 04:39:44,724 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:39:44,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:39:44,891 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-11-07 04:39:44,892 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258273442] [2019-11-07 04:39:44,893 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 04:39:44,893 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-07 04:39:44,895 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916527656] [2019-11-07 04:39:44,900 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 04:39:44,901 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:39:44,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 04:39:44,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 04:39:44,913 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 3 states. [2019-11-07 04:39:44,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:39:44,964 INFO L93 Difference]: Finished difference Result 41 states and 51 transitions. [2019-11-07 04:39:44,965 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 04:39:44,966 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2019-11-07 04:39:44,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:39:44,975 INFO L225 Difference]: With dead ends: 41 [2019-11-07 04:39:44,976 INFO L226 Difference]: Without dead ends: 20 [2019-11-07 04:39:44,979 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 04:39:44,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-11-07 04:39:45,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2019-11-07 04:39:45,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-11-07 04:39:45,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2019-11-07 04:39:45,019 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 24 [2019-11-07 04:39:45,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:39:45,020 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2019-11-07 04:39:45,020 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 04:39:45,021 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2019-11-07 04:39:45,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-11-07 04:39:45,023 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:39:45,023 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 04:39:45,023 INFO L410 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:39:45,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:39:45,024 INFO L82 PathProgramCache]: Analyzing trace with hash -1274606805, now seen corresponding path program 1 times [2019-11-07 04:39:45,024 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:39:45,024 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073316676] [2019-11-07 04:39:45,025 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:39:45,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:39:45,103 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-07 04:39:45,104 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073316676] [2019-11-07 04:39:45,105 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064109258] [2019-11-07 04:39:45,105 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 04:39:45,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:39:45,176 INFO L256 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-07 04:39:45,186 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 04:39:45,215 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-07 04:39:45,216 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 04:39:45,259 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-07 04:39:45,259 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 04:39:45,259 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3] total 5 [2019-11-07 04:39:45,262 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695151215] [2019-11-07 04:39:45,262 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 04:39:45,263 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:39:45,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 04:39:45,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-07 04:39:45,264 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand 3 states. [2019-11-07 04:39:45,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:39:45,285 INFO L93 Difference]: Finished difference Result 33 states and 43 transitions. [2019-11-07 04:39:45,286 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 04:39:45,286 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2019-11-07 04:39:45,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:39:45,287 INFO L225 Difference]: With dead ends: 33 [2019-11-07 04:39:45,287 INFO L226 Difference]: Without dead ends: 21 [2019-11-07 04:39:45,290 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-07 04:39:45,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-11-07 04:39:45,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2019-11-07 04:39:45,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-11-07 04:39:45,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2019-11-07 04:39:45,299 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 25 [2019-11-07 04:39:45,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:39:45,300 INFO L462 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2019-11-07 04:39:45,300 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 04:39:45,300 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2019-11-07 04:39:45,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-11-07 04:39:45,303 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:39:45,303 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 04:39:45,519 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 04:39:45,520 INFO L410 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:39:45,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:39:45,521 INFO L82 PathProgramCache]: Analyzing trace with hash -544560989, now seen corresponding path program 1 times [2019-11-07 04:39:45,521 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:39:45,522 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5316205] [2019-11-07 04:39:45,522 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:39:45,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:39:45,622 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-11-07 04:39:45,623 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5316205] [2019-11-07 04:39:45,623 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 04:39:45,623 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-07 04:39:45,623 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089463931] [2019-11-07 04:39:45,625 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 04:39:45,625 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:39:45,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 04:39:45,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 04:39:45,626 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 3 states. [2019-11-07 04:39:45,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:39:45,637 INFO L93 Difference]: Finished difference Result 31 states and 36 transitions. [2019-11-07 04:39:45,637 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 04:39:45,637 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2019-11-07 04:39:45,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:39:45,639 INFO L225 Difference]: With dead ends: 31 [2019-11-07 04:39:45,639 INFO L226 Difference]: Without dead ends: 22 [2019-11-07 04:39:45,639 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 04:39:45,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-11-07 04:39:45,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2019-11-07 04:39:45,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-11-07 04:39:45,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2019-11-07 04:39:45,645 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 28 [2019-11-07 04:39:45,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:39:45,648 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2019-11-07 04:39:45,648 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 04:39:45,648 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2019-11-07 04:39:45,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-11-07 04:39:45,649 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:39:45,649 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 04:39:45,650 INFO L410 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:39:45,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:39:45,650 INFO L82 PathProgramCache]: Analyzing trace with hash -5957836, now seen corresponding path program 1 times [2019-11-07 04:39:45,650 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:39:45,651 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737845198] [2019-11-07 04:39:45,651 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:39:45,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:39:45,773 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-11-07 04:39:45,774 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737845198] [2019-11-07 04:39:45,774 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700146228] [2019-11-07 04:39:45,774 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 04:39:45,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:39:45,863 INFO L256 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 04:39:45,866 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 04:39:45,880 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-11-07 04:39:45,880 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 04:39:45,916 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-11-07 04:39:45,917 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1887309975] [2019-11-07 04:39:45,941 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2019-11-07 04:39:45,942 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 04:39:45,948 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 04:39:45,955 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 04:39:45,955 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 04:39:46,084 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 04:39:46,553 INFO L197 IcfgInterpreter]: Interpreting procedure sep with input of size 1 for LOIs [2019-11-07 04:39:46,584 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 04:39:46,586 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 04:39:47,283 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 04:39:47,283 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 15] total 21 [2019-11-07 04:39:47,284 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332407249] [2019-11-07 04:39:47,285 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-11-07 04:39:47,285 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:39:47,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-11-07 04:39:47,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2019-11-07 04:39:47,289 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand 21 states. [2019-11-07 04:39:50,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:39:50,962 INFO L93 Difference]: Finished difference Result 40 states and 50 transitions. [2019-11-07 04:39:50,963 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-11-07 04:39:50,963 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 29 [2019-11-07 04:39:50,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:39:50,964 INFO L225 Difference]: With dead ends: 40 [2019-11-07 04:39:50,964 INFO L226 Difference]: Without dead ends: 25 [2019-11-07 04:39:50,965 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=170, Invalid=1089, Unknown=1, NotChecked=0, Total=1260 [2019-11-07 04:39:50,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-11-07 04:39:50,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2019-11-07 04:39:50,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-11-07 04:39:50,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2019-11-07 04:39:50,972 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 29 [2019-11-07 04:39:50,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:39:50,973 INFO L462 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2019-11-07 04:39:50,973 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-11-07 04:39:50,973 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2019-11-07 04:39:50,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-11-07 04:39:50,974 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:39:50,974 INFO L410 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 04:39:51,177 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 04:39:51,178 INFO L410 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:39:51,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:39:51,178 INFO L82 PathProgramCache]: Analyzing trace with hash -1961836647, now seen corresponding path program 2 times [2019-11-07 04:39:51,179 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:39:51,179 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221438483] [2019-11-07 04:39:51,179 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:39:51,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:39:51,299 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-11-07 04:39:51,300 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221438483] [2019-11-07 04:39:51,300 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897012744] [2019-11-07 04:39:51,300 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 04:39:51,347 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-11-07 04:39:51,348 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-07 04:39:51,349 INFO L256 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 04:39:51,351 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 04:39:51,364 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-11-07 04:39:51,364 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 04:39:51,386 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-11-07 04:39:51,387 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1546394948] [2019-11-07 04:39:51,389 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2019-11-07 04:39:51,389 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 04:39:51,389 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 04:39:51,389 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 04:39:51,390 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 04:39:51,408 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 04:39:51,745 INFO L197 IcfgInterpreter]: Interpreting procedure sep with input of size 1 for LOIs [2019-11-07 04:39:51,768 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 04:39:51,771 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 04:39:52,304 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 04:39:52,305 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 15] total 21 [2019-11-07 04:39:52,305 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379537650] [2019-11-07 04:39:52,306 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-11-07 04:39:52,306 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:39:52,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-11-07 04:39:52,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2019-11-07 04:39:52,307 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand 21 states. [2019-11-07 04:39:55,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:39:55,297 INFO L93 Difference]: Finished difference Result 42 states and 54 transitions. [2019-11-07 04:39:55,297 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-11-07 04:39:55,297 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 32 [2019-11-07 04:39:55,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:39:55,299 INFO L225 Difference]: With dead ends: 42 [2019-11-07 04:39:55,299 INFO L226 Difference]: Without dead ends: 28 [2019-11-07 04:39:55,300 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=195, Invalid=1065, Unknown=0, NotChecked=0, Total=1260 [2019-11-07 04:39:55,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-11-07 04:39:55,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2019-11-07 04:39:55,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-11-07 04:39:55,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2019-11-07 04:39:55,308 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 32 [2019-11-07 04:39:55,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:39:55,308 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2019-11-07 04:39:55,309 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-11-07 04:39:55,309 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2019-11-07 04:39:55,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-11-07 04:39:55,310 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:39:55,310 INFO L410 BasicCegarLoop]: trace histogram [12, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 04:39:55,514 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 04:39:55,515 INFO L410 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:39:55,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:39:55,515 INFO L82 PathProgramCache]: Analyzing trace with hash 1430720737, now seen corresponding path program 3 times [2019-11-07 04:39:55,516 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:39:55,516 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231579001] [2019-11-07 04:39:55,516 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:39:55,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:39:55,649 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2019-11-07 04:39:55,650 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231579001] [2019-11-07 04:39:55,650 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2001423418] [2019-11-07 04:39:55,650 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 04:39:55,745 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-07 04:39:55,746 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-07 04:39:55,747 INFO L256 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-07 04:39:55,756 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 04:39:55,810 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 52 proven. 10 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2019-11-07 04:39:55,810 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 04:39:55,862 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2019-11-07 04:39:55,862 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1583970500] [2019-11-07 04:39:55,864 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2019-11-07 04:39:55,864 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 04:39:55,865 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 04:39:55,865 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 04:39:55,865 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 04:39:55,890 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 04:39:56,178 INFO L197 IcfgInterpreter]: Interpreting procedure sep with input of size 1 for LOIs [2019-11-07 04:39:56,201 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 04:39:56,204 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 04:39:58,896 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 04:39:58,896 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 15] total 26 [2019-11-07 04:39:58,896 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286120620] [2019-11-07 04:39:58,898 INFO L442 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-11-07 04:39:58,898 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:39:58,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-11-07 04:39:58,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=568, Unknown=1, NotChecked=0, Total=650 [2019-11-07 04:39:58,899 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 26 states. [2019-11-07 04:40:00,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:40:00,385 INFO L93 Difference]: Finished difference Result 48 states and 60 transitions. [2019-11-07 04:40:00,386 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-11-07 04:40:00,386 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 41 [2019-11-07 04:40:00,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:40:00,387 INFO L225 Difference]: With dead ends: 48 [2019-11-07 04:40:00,387 INFO L226 Difference]: Without dead ends: 30 [2019-11-07 04:40:00,389 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 100 SyntacticMatches, 5 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 494 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=271, Invalid=1890, Unknown=1, NotChecked=0, Total=2162 [2019-11-07 04:40:00,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-11-07 04:40:00,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2019-11-07 04:40:00,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-11-07 04:40:00,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2019-11-07 04:40:00,395 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 41 [2019-11-07 04:40:00,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:40:00,396 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2019-11-07 04:40:00,396 INFO L463 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-11-07 04:40:00,396 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2019-11-07 04:40:00,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-11-07 04:40:00,397 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:40:00,397 INFO L410 BasicCegarLoop]: trace histogram [15, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 04:40:00,599 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 04:40:00,599 INFO L410 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:40:00,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:40:00,600 INFO L82 PathProgramCache]: Analyzing trace with hash 504323828, now seen corresponding path program 4 times [2019-11-07 04:40:00,600 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:40:00,600 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812409805] [2019-11-07 04:40:00,600 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:40:00,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:40:00,711 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 174 trivial. 0 not checked. [2019-11-07 04:40:00,711 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812409805] [2019-11-07 04:40:00,712 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1789655175] [2019-11-07 04:40:00,712 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 04:40:00,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:40:00,817 INFO L256 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 04:40:00,823 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 04:40:00,841 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 76 proven. 1 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2019-11-07 04:40:00,841 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 04:40:00,867 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 174 trivial. 0 not checked. [2019-11-07 04:40:00,868 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [592284419] [2019-11-07 04:40:00,869 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2019-11-07 04:40:00,870 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 04:40:00,872 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 04:40:00,872 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 04:40:00,872 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 04:40:00,894 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 04:40:01,147 INFO L197 IcfgInterpreter]: Interpreting procedure sep with input of size 1 for LOIs [2019-11-07 04:40:01,166 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 04:40:01,167 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 04:40:01,716 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 04:40:01,717 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 15] total 21 [2019-11-07 04:40:01,717 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807146694] [2019-11-07 04:40:01,718 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-11-07 04:40:01,718 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:40:01,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-11-07 04:40:01,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2019-11-07 04:40:01,719 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand 21 states. [2019-11-07 04:40:04,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:40:04,562 INFO L93 Difference]: Finished difference Result 46 states and 53 transitions. [2019-11-07 04:40:04,562 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-11-07 04:40:04,563 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 45 [2019-11-07 04:40:04,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:40:04,564 INFO L225 Difference]: With dead ends: 46 [2019-11-07 04:40:04,564 INFO L226 Difference]: Without dead ends: 33 [2019-11-07 04:40:04,566 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=178, Invalid=1081, Unknown=1, NotChecked=0, Total=1260 [2019-11-07 04:40:04,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-11-07 04:40:04,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2019-11-07 04:40:04,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-11-07 04:40:04,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2019-11-07 04:40:04,574 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 45 [2019-11-07 04:40:04,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:40:04,575 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2019-11-07 04:40:04,575 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-11-07 04:40:04,575 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2019-11-07 04:40:04,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-11-07 04:40:04,576 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:40:04,576 INFO L410 BasicCegarLoop]: trace histogram [15, 5, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 04:40:04,779 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 04:40:04,780 INFO L410 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:40:04,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:40:04,781 INFO L82 PathProgramCache]: Analyzing trace with hash 934351779, now seen corresponding path program 5 times [2019-11-07 04:40:04,781 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:40:04,781 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962420036] [2019-11-07 04:40:04,781 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:40:06,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:40:07,573 ERROR L253 erpolLogProxyWrapper]: Interpolant 16 not inductive [2019-11-07 04:40:08,979 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: generated interpolants did not pass sanity check at de.uni_freiburg.informatik.ultimate.smtinterpol.interpolate.Interpolator.getInterpolants(Interpolator.java:221) at de.uni_freiburg.informatik.ultimate.smtinterpol.smtlib2.SMTInterpol.getInterpolants(SMTInterpol.java:863) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.getInterpolants(WrapperScript.java:338) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.managedscript.ManagedScript.getInterpolants(ManagedScript.java:199) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.NestedInterpolantsBuilder.computeCraigInterpolants(NestedInterpolantsBuilder.java:284) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.NestedInterpolantsBuilder.(NestedInterpolantsBuilder.java:167) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.InterpolatingTraceCheckCraig.computeInterpolantsTree(InterpolatingTraceCheckCraig.java:274) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.InterpolatingTraceCheckCraig.computeInterpolants(InterpolatingTraceCheckCraig.java:210) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.InterpolatingTraceCheckCraig.(InterpolatingTraceCheckCraig.java:109) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleCraig.construct(IpTcStrategyModuleCraig.java:79) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleCraig.construct(IpTcStrategyModuleCraig.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.isCorrect(IpTcStrategyModuleBase.java:57) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.checkFeasibility(AutomatonFreeRefinementEngine.java:239) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:164) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:83) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:75) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:463) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:419) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:368) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterate(TraceAbstractionStarter.java:332) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:170) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:122) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:120) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:316) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) [2019-11-07 04:40:08,984 INFO L168 Benchmark]: Toolchain (without parser) took 25212.26 ms. Allocated memory was 137.9 MB in the beginning and 342.4 MB in the end (delta: 204.5 MB). Free memory was 101.9 MB in the beginning and 110.0 MB in the end (delta: -8.1 MB). Peak memory consumption was 242.9 MB. Max. memory is 7.1 GB. [2019-11-07 04:40:08,985 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 137.9 MB. Free memory was 119.8 MB in the beginning and 119.6 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. [2019-11-07 04:40:08,985 INFO L168 Benchmark]: CACSL2BoogieTranslator took 254.68 ms. Allocated memory is still 137.9 MB. Free memory was 101.7 MB in the beginning and 91.3 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. [2019-11-07 04:40:08,986 INFO L168 Benchmark]: Boogie Preprocessor took 129.18 ms. Allocated memory was 137.9 MB in the beginning and 201.9 MB in the end (delta: 64.0 MB). Free memory was 91.3 MB in the beginning and 179.5 MB in the end (delta: -88.2 MB). Peak memory consumption was 13.5 MB. Max. memory is 7.1 GB. [2019-11-07 04:40:08,987 INFO L168 Benchmark]: RCFGBuilder took 466.52 ms. Allocated memory is still 201.9 MB. Free memory was 179.5 MB in the beginning and 157.0 MB in the end (delta: 22.5 MB). Peak memory consumption was 22.5 MB. Max. memory is 7.1 GB. [2019-11-07 04:40:08,987 INFO L168 Benchmark]: TraceAbstraction took 24357.92 ms. Allocated memory was 201.9 MB in the beginning and 342.4 MB in the end (delta: 140.5 MB). Free memory was 157.0 MB in the beginning and 110.0 MB in the end (delta: 47.0 MB). Peak memory consumption was 234.1 MB. Max. memory is 7.1 GB. [2019-11-07 04:40:08,990 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 137.9 MB. Free memory was 119.8 MB in the beginning and 119.6 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 254.68 ms. Allocated memory is still 137.9 MB. Free memory was 101.7 MB in the beginning and 91.3 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 129.18 ms. Allocated memory was 137.9 MB in the beginning and 201.9 MB in the end (delta: 64.0 MB). Free memory was 91.3 MB in the beginning and 179.5 MB in the end (delta: -88.2 MB). Peak memory consumption was 13.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 466.52 ms. Allocated memory is still 201.9 MB. Free memory was 179.5 MB in the beginning and 157.0 MB in the end (delta: 22.5 MB). Peak memory consumption was 22.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 24357.92 ms. Allocated memory was 201.9 MB in the beginning and 342.4 MB in the end (delta: 140.5 MB). Free memory was 157.0 MB in the beginning and 110.0 MB in the end (delta: 47.0 MB). Peak memory consumption was 234.1 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: generated interpolants did not pass sanity check de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: generated interpolants did not pass sanity check: de.uni_freiburg.informatik.ultimate.smtinterpol.interpolate.Interpolator.getInterpolants(Interpolator.java:221) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...