/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/array-examples/standard_init8_ground-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-07 01:24:56,780 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2019-11-07 01:24:56,869 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-07 01:24:56,870 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-07 01:24:56,870 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-07 01:24:56,871 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-07 01:24:56,906 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-07 01:24:56,906 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-07 01:24:56,910 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-07 01:24:56,911 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-07 01:24:56,911 INFO L138 SettingsManager]: * Use SBE=true [2019-11-07 01:24:56,911 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-07 01:24:56,911 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-07 01:24:56,911 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-07 01:24:56,912 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-07 01:24:56,912 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-07 01:24:56,912 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-07 01:24:56,912 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-07 01:24:56,912 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-07 01:24:56,912 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-07 01:24:56,915 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-07 01:24:56,915 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-07 01:24:56,915 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-07 01:24:56,915 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-07 01:24:56,916 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-07 01:24:56,916 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-07 01:24:56,916 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-07 01:24:56,916 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 01:24:56,916 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-07 01:24:56,917 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-07 01:24:56,917 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-07 01:24:56,917 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-07 01:24:56,917 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-07 01:24:56,917 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-07 01:24:56,918 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> SIFA_TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> CompoundDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> LoopFreeBlock Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Call Summarizer -> TopInputCallSummarizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Fluid -> SizeLimitFluid Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Simplification Technique -> SIMPLIFY_QUICK [2019-11-07 01:24:57,189 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-07 01:24:57,202 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-07 01:24:57,206 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-07 01:24:57,207 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-07 01:24:57,208 INFO L275 PluginConnector]: CDTParser initialized [2019-11-07 01:24:57,208 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_init8_ground-2.i [2019-11-07 01:24:57,292 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2a88e9ec9/849efd223692413c878f705273466d46/FLAGbb9e9c757 [2019-11-07 01:24:57,773 INFO L306 CDTParser]: Found 1 translation units. [2019-11-07 01:24:57,774 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_init8_ground-2.i [2019-11-07 01:24:57,781 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2a88e9ec9/849efd223692413c878f705273466d46/FLAGbb9e9c757 [2019-11-07 01:24:58,128 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2a88e9ec9/849efd223692413c878f705273466d46 [2019-11-07 01:24:58,145 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-07 01:24:58,161 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-07 01:24:58,165 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-07 01:24:58,165 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-07 01:24:58,174 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-07 01:24:58,178 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:24:58" (1/1) ... [2019-11-07 01:24:58,185 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4bbfad37 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:24:58, skipping insertion in model container [2019-11-07 01:24:58,186 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:24:58" (1/1) ... [2019-11-07 01:24:58,207 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-07 01:24:58,232 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-07 01:24:58,414 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 01:24:58,418 INFO L188 MainTranslator]: Completed pre-run [2019-11-07 01:24:58,445 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 01:24:58,553 INFO L192 MainTranslator]: Completed translation [2019-11-07 01:24:58,554 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:24:58 WrapperNode [2019-11-07 01:24:58,554 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-07 01:24:58,555 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-07 01:24:58,555 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-07 01:24:58,555 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-07 01:24:58,570 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:24:58" (1/1) ... [2019-11-07 01:24:58,570 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:24:58" (1/1) ... [2019-11-07 01:24:58,579 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:24:58" (1/1) ... [2019-11-07 01:24:58,581 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:24:58" (1/1) ... [2019-11-07 01:24:58,593 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:24:58" (1/1) ... [2019-11-07 01:24:58,607 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:24:58" (1/1) ... [2019-11-07 01:24:58,609 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:24:58" (1/1) ... [2019-11-07 01:24:58,611 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-07 01:24:58,611 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-07 01:24:58,611 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-07 01:24:58,612 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-07 01:24:58,612 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:24:58" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 01:24:58,661 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-07 01:24:58,662 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-07 01:24:58,662 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-11-07 01:24:58,662 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-07 01:24:58,662 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-07 01:24:58,662 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-11-07 01:24:58,663 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-07 01:24:58,663 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-07 01:24:58,663 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-07 01:24:58,663 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-07 01:24:58,663 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-07 01:24:58,663 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-07 01:24:58,664 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-07 01:24:59,061 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-07 01:24:59,061 INFO L284 CfgBuilder]: Removed 9 assume(true) statements. [2019-11-07 01:24:59,062 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:24:59 BoogieIcfgContainer [2019-11-07 01:24:59,063 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-07 01:24:59,064 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-07 01:24:59,064 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-07 01:24:59,067 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-07 01:24:59,067 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:24:58" (1/3) ... [2019-11-07 01:24:59,068 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56684840 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:24:59, skipping insertion in model container [2019-11-07 01:24:59,068 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:24:58" (2/3) ... [2019-11-07 01:24:59,069 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56684840 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:24:59, skipping insertion in model container [2019-11-07 01:24:59,069 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:24:59" (3/3) ... [2019-11-07 01:24:59,071 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_init8_ground-2.i [2019-11-07 01:24:59,079 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-07 01:24:59,085 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-07 01:24:59,095 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-07 01:24:59,120 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-07 01:24:59,120 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-07 01:24:59,120 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-07 01:24:59,120 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-07 01:24:59,120 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-07 01:24:59,121 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-07 01:24:59,121 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-07 01:24:59,121 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-07 01:24:59,139 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2019-11-07 01:24:59,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-11-07 01:24:59,145 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:24:59,146 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:24:59,147 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:24:59,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:24:59,152 INFO L82 PathProgramCache]: Analyzing trace with hash 1093654900, now seen corresponding path program 1 times [2019-11-07 01:24:59,159 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:24:59,159 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466711370] [2019-11-07 01:24:59,160 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:24:59,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:24:59,323 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:24:59,324 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466711370] [2019-11-07 01:24:59,325 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 01:24:59,325 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-07 01:24:59,326 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258755199] [2019-11-07 01:24:59,333 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 01:24:59,334 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:24:59,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 01:24:59,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 01:24:59,352 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 3 states. [2019-11-07 01:24:59,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:24:59,459 INFO L93 Difference]: Finished difference Result 52 states and 78 transitions. [2019-11-07 01:24:59,460 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 01:24:59,462 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2019-11-07 01:24:59,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:24:59,472 INFO L225 Difference]: With dead ends: 52 [2019-11-07 01:24:59,472 INFO L226 Difference]: Without dead ends: 30 [2019-11-07 01:24:59,479 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 01:24:59,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-11-07 01:24:59,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2019-11-07 01:24:59,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-11-07 01:24:59,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 38 transitions. [2019-11-07 01:24:59,521 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 38 transitions. Word has length 18 [2019-11-07 01:24:59,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:24:59,521 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 38 transitions. [2019-11-07 01:24:59,522 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 01:24:59,522 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 38 transitions. [2019-11-07 01:24:59,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-11-07 01:24:59,524 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:24:59,524 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:24:59,524 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:24:59,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:24:59,525 INFO L82 PathProgramCache]: Analyzing trace with hash -1527898784, now seen corresponding path program 1 times [2019-11-07 01:24:59,525 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:24:59,525 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875096815] [2019-11-07 01:24:59,525 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:24:59,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:24:59,636 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-07 01:24:59,636 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875096815] [2019-11-07 01:24:59,637 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [257828035] [2019-11-07 01:24:59,637 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:24:59,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:24:59,722 INFO L256 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 01:24:59,732 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:24:59,782 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-07 01:24:59,788 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:24:59,830 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-07 01:24:59,831 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [27594688] [2019-11-07 01:24:59,875 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2019-11-07 01:24:59,875 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:24:59,890 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:24:59,909 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:24:59,910 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:25:00,033 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 01:25:00,996 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 28 for LOIs [2019-11-07 01:25:01,008 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 01:25:01,010 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:25:01,412 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 01:25:01,412 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 10] total 17 [2019-11-07 01:25:01,414 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563277209] [2019-11-07 01:25:01,416 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-11-07 01:25:01,416 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:25:01,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-11-07 01:25:01,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2019-11-07 01:25:01,419 INFO L87 Difference]: Start difference. First operand 30 states and 38 transitions. Second operand 17 states. [2019-11-07 01:25:02,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:25:02,293 INFO L93 Difference]: Finished difference Result 86 states and 125 transitions. [2019-11-07 01:25:02,294 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-07 01:25:02,294 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 26 [2019-11-07 01:25:02,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:25:02,295 INFO L225 Difference]: With dead ends: 86 [2019-11-07 01:25:02,296 INFO L226 Difference]: Without dead ends: 63 [2019-11-07 01:25:02,299 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=141, Invalid=615, Unknown=0, NotChecked=0, Total=756 [2019-11-07 01:25:02,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2019-11-07 01:25:02,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 54. [2019-11-07 01:25:02,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2019-11-07 01:25:02,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 62 transitions. [2019-11-07 01:25:02,323 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 62 transitions. Word has length 26 [2019-11-07 01:25:02,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:25:02,323 INFO L462 AbstractCegarLoop]: Abstraction has 54 states and 62 transitions. [2019-11-07 01:25:02,323 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-11-07 01:25:02,323 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 62 transitions. [2019-11-07 01:25:02,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2019-11-07 01:25:02,328 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:25:02,329 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:25:02,534 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:25:02,535 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:25:02,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:25:02,536 INFO L82 PathProgramCache]: Analyzing trace with hash -1892290956, now seen corresponding path program 2 times [2019-11-07 01:25:02,536 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:25:02,537 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666415346] [2019-11-07 01:25:02,537 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:25:02,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:25:02,713 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2019-11-07 01:25:02,715 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666415346] [2019-11-07 01:25:02,715 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966503945] [2019-11-07 01:25:02,715 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 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:25:02,874 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-07 01:25:02,874 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-07 01:25:02,876 INFO L256 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-07 01:25:02,879 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:25:02,891 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2019-11-07 01:25:02,891 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:25:02,978 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2019-11-07 01:25:02,978 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1067956289] [2019-11-07 01:25:02,980 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2019-11-07 01:25:02,980 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:25:02,981 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:25:02,981 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:25:02,981 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:25:03,003 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 01:25:03,679 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 28 for LOIs [2019-11-07 01:25:03,688 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 01:25:03,690 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:25:04,016 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 01:25:04,017 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 10] total 23 [2019-11-07 01:25:04,017 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881640014] [2019-11-07 01:25:04,019 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-11-07 01:25:04,019 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:25:04,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-11-07 01:25:04,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=399, Unknown=0, NotChecked=0, Total=506 [2019-11-07 01:25:04,020 INFO L87 Difference]: Start difference. First operand 54 states and 62 transitions. Second operand 23 states. [2019-11-07 01:25:05,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:25:05,307 INFO L93 Difference]: Finished difference Result 155 states and 218 transitions. [2019-11-07 01:25:05,308 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-11-07 01:25:05,308 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 50 [2019-11-07 01:25:05,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:25:05,310 INFO L225 Difference]: With dead ends: 155 [2019-11-07 01:25:05,310 INFO L226 Difference]: Without dead ends: 111 [2019-11-07 01:25:05,311 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 404 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=312, Invalid=1248, Unknown=0, NotChecked=0, Total=1560 [2019-11-07 01:25:05,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2019-11-07 01:25:05,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 102. [2019-11-07 01:25:05,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2019-11-07 01:25:05,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 110 transitions. [2019-11-07 01:25:05,331 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 110 transitions. Word has length 50 [2019-11-07 01:25:05,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:25:05,331 INFO L462 AbstractCegarLoop]: Abstraction has 102 states and 110 transitions. [2019-11-07 01:25:05,332 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-11-07 01:25:05,332 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 110 transitions. [2019-11-07 01:25:05,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2019-11-07 01:25:05,335 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:25:05,335 INFO L410 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:25:05,538 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:25:05,539 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:25:05,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:25:05,539 INFO L82 PathProgramCache]: Analyzing trace with hash 224910836, now seen corresponding path program 3 times [2019-11-07 01:25:05,539 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:25:05,540 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610777932] [2019-11-07 01:25:05,540 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:25:05,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:25:05,809 INFO L134 CoverageAnalysis]: Checked inductivity of 440 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2019-11-07 01:25:05,812 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610777932] [2019-11-07 01:25:05,812 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [698606307] [2019-11-07 01:25:05,812 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 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:25:05,934 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-07 01:25:05,935 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-07 01:25:05,937 INFO L256 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-07 01:25:05,950 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:25:05,978 INFO L134 CoverageAnalysis]: Checked inductivity of 440 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2019-11-07 01:25:05,978 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:25:06,198 INFO L134 CoverageAnalysis]: Checked inductivity of 440 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2019-11-07 01:25:06,200 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [11508829] [2019-11-07 01:25:06,205 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2019-11-07 01:25:06,205 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:25:06,205 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:25:06,206 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:25:06,206 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:25:06,225 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 01:25:06,707 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 28 for LOIs [2019-11-07 01:25:06,712 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 01:25:06,714 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:25:07,101 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 01:25:07,101 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13, 10] total 35 [2019-11-07 01:25:07,101 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111910660] [2019-11-07 01:25:07,103 INFO L442 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-11-07 01:25:07,103 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:25:07,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-11-07 01:25:07,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=329, Invalid=861, Unknown=0, NotChecked=0, Total=1190 [2019-11-07 01:25:07,104 INFO L87 Difference]: Start difference. First operand 102 states and 110 transitions. Second operand 35 states. [2019-11-07 01:25:09,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:25:09,484 INFO L93 Difference]: Finished difference Result 293 states and 404 transitions. [2019-11-07 01:25:09,485 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-11-07 01:25:09,485 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 98 [2019-11-07 01:25:09,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:25:09,488 INFO L225 Difference]: With dead ends: 293 [2019-11-07 01:25:09,488 INFO L226 Difference]: Without dead ends: 207 [2019-11-07 01:25:09,490 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 336 GetRequests, 274 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1007 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=978, Invalid=3054, Unknown=0, NotChecked=0, Total=4032 [2019-11-07 01:25:09,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2019-11-07 01:25:09,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 198. [2019-11-07 01:25:09,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2019-11-07 01:25:09,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 206 transitions. [2019-11-07 01:25:09,517 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 206 transitions. Word has length 98 [2019-11-07 01:25:09,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:25:09,518 INFO L462 AbstractCegarLoop]: Abstraction has 198 states and 206 transitions. [2019-11-07 01:25:09,518 INFO L463 AbstractCegarLoop]: Interpolant automaton has 35 states. [2019-11-07 01:25:09,518 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 206 transitions. [2019-11-07 01:25:09,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2019-11-07 01:25:09,521 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:25:09,521 INFO L410 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:25:09,725 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:25:09,726 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:25:09,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:25:09,726 INFO L82 PathProgramCache]: Analyzing trace with hash -396239628, now seen corresponding path program 4 times [2019-11-07 01:25:09,727 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:25:09,727 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945667096] [2019-11-07 01:25:09,727 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:25:09,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:25:10,292 INFO L134 CoverageAnalysis]: Checked inductivity of 2024 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 1771 trivial. 0 not checked. [2019-11-07 01:25:10,293 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945667096] [2019-11-07 01:25:10,293 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [673115829] [2019-11-07 01:25:10,293 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 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 01:25:10,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:25:10,468 INFO L256 TraceCheckSpWp]: Trace formula consists of 776 conjuncts, 24 conjunts are in the unsatisfiable core [2019-11-07 01:25:10,475 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:25:10,537 INFO L134 CoverageAnalysis]: Checked inductivity of 2024 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 1771 trivial. 0 not checked. [2019-11-07 01:25:10,537 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:25:11,241 INFO L134 CoverageAnalysis]: Checked inductivity of 2024 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 1771 trivial. 0 not checked. [2019-11-07 01:25:11,241 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1207903244] [2019-11-07 01:25:11,243 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2019-11-07 01:25:11,243 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:25:11,244 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:25:11,244 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:25:11,244 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:25:11,267 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 01:25:11,692 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 28 for LOIs [2019-11-07 01:25:11,697 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 01:25:11,699 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:25:12,089 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 01:25:12,090 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25, 10] total 59 [2019-11-07 01:25:12,090 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173345995] [2019-11-07 01:25:12,091 INFO L442 AbstractCegarLoop]: Interpolant automaton has 59 states [2019-11-07 01:25:12,092 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:25:12,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2019-11-07 01:25:12,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1205, Invalid=2217, Unknown=0, NotChecked=0, Total=3422 [2019-11-07 01:25:12,094 INFO L87 Difference]: Start difference. First operand 198 states and 206 transitions. Second operand 59 states. [2019-11-07 01:25:18,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:25:18,401 INFO L93 Difference]: Finished difference Result 569 states and 776 transitions. [2019-11-07 01:25:18,401 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2019-11-07 01:25:18,402 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 194 [2019-11-07 01:25:18,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:25:18,406 INFO L225 Difference]: With dead ends: 569 [2019-11-07 01:25:18,406 INFO L226 Difference]: Without dead ends: 399 [2019-11-07 01:25:18,412 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 660 GetRequests, 550 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2753 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=3606, Invalid=8826, Unknown=0, NotChecked=0, Total=12432 [2019-11-07 01:25:18,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2019-11-07 01:25:18,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 390. [2019-11-07 01:25:18,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 390 states. [2019-11-07 01:25:18,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 398 transitions. [2019-11-07 01:25:18,454 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 398 transitions. Word has length 194 [2019-11-07 01:25:18,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:25:18,455 INFO L462 AbstractCegarLoop]: Abstraction has 390 states and 398 transitions. [2019-11-07 01:25:18,455 INFO L463 AbstractCegarLoop]: Interpolant automaton has 59 states. [2019-11-07 01:25:18,455 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 398 transitions. [2019-11-07 01:25:18,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 387 [2019-11-07 01:25:18,460 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:25:18,461 INFO L410 BasicCegarLoop]: trace histogram [46, 46, 46, 46, 46, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:25:18,666 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:25:18,667 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:25:18,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:25:18,668 INFO L82 PathProgramCache]: Analyzing trace with hash 2070829812, now seen corresponding path program 5 times [2019-11-07 01:25:18,668 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:25:18,668 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613601633] [2019-11-07 01:25:18,669 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:25:19,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:25:20,254 INFO L134 CoverageAnalysis]: Checked inductivity of 8648 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 7567 trivial. 0 not checked. [2019-11-07 01:25:20,255 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613601633] [2019-11-07 01:25:20,255 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060064731] [2019-11-07 01:25:20,255 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 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