/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_init5_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-07 01:24:11,856 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2019-11-07 01:24:11,894 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-07 01:24:11,898 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-07 01:24:11,899 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-07 01:24:11,901 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-07 01:24:11,903 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-07 01:24:11,905 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-07 01:24:11,907 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-07 01:24:11,911 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-07 01:24:11,915 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-07 01:24:11,918 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-07 01:24:11,920 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-07 01:24:11,921 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-07 01:24:11,924 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-07 01:24:11,935 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-07 01:24:11,936 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-07 01:24:11,937 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-07 01:24:11,937 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 01:24:11,965 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-07 01:24:11,965 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-07 01:24:11,967 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-07 01:24:11,968 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-07 01:24:11,968 INFO L138 SettingsManager]: * Use SBE=true [2019-11-07 01:24:11,968 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-07 01:24:11,968 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-07 01:24:11,969 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-07 01:24:11,969 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-07 01:24:11,969 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-07 01:24:11,970 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-07 01:24:11,970 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-07 01:24:11,971 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-07 01:24:11,971 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-07 01:24:11,971 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-07 01:24:11,971 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-07 01:24:11,972 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-07 01:24:11,972 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-07 01:24:11,972 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-07 01:24:11,972 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-07 01:24:11,972 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-07 01:24:11,972 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 01:24:11,973 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-07 01:24:11,973 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-07 01:24:11,973 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-07 01:24:11,973 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-07 01:24:11,973 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-07 01:24:11,974 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-07 01:24:11,974 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 01:24:12,286 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-07 01:24:12,307 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-07 01:24:12,311 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-07 01:24:12,312 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-07 01:24:12,313 INFO L275 PluginConnector]: CDTParser initialized [2019-11-07 01:24:12,313 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_init5_ground-1.i [2019-11-07 01:24:12,385 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/713d1631b/e2f6a356e48f45c6b0fe91b7fabceeff/FLAG9f96cd54b [2019-11-07 01:24:12,847 INFO L306 CDTParser]: Found 1 translation units. [2019-11-07 01:24:12,848 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_init5_ground-1.i [2019-11-07 01:24:12,855 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/713d1631b/e2f6a356e48f45c6b0fe91b7fabceeff/FLAG9f96cd54b [2019-11-07 01:24:13,272 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/713d1631b/e2f6a356e48f45c6b0fe91b7fabceeff [2019-11-07 01:24:13,280 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-07 01:24:13,282 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-07 01:24:13,283 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-07 01:24:13,283 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-07 01:24:13,287 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-07 01:24:13,288 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:24:13" (1/1) ... [2019-11-07 01:24:13,291 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4bca38fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:24:13, skipping insertion in model container [2019-11-07 01:24:13,291 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:24:13" (1/1) ... [2019-11-07 01:24:13,299 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-07 01:24:13,317 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-07 01:24:13,561 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 01:24:13,572 INFO L188 MainTranslator]: Completed pre-run [2019-11-07 01:24:13,593 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 01:24:13,615 INFO L192 MainTranslator]: Completed translation [2019-11-07 01:24:13,616 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:24:13 WrapperNode [2019-11-07 01:24:13,616 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-07 01:24:13,617 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-07 01:24:13,617 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-07 01:24:13,617 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-07 01:24:13,714 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:24:13" (1/1) ... [2019-11-07 01:24:13,715 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:24:13" (1/1) ... [2019-11-07 01:24:13,724 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:24:13" (1/1) ... [2019-11-07 01:24:13,724 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:24:13" (1/1) ... [2019-11-07 01:24:13,732 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:24:13" (1/1) ... [2019-11-07 01:24:13,744 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:24:13" (1/1) ... [2019-11-07 01:24:13,751 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:24:13" (1/1) ... [2019-11-07 01:24:13,753 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-07 01:24:13,754 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-07 01:24:13,754 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-07 01:24:13,754 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-07 01:24:13,757 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:24:13" (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 01:24:13,817 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-07 01:24:13,817 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-07 01:24:13,817 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-11-07 01:24:13,817 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-07 01:24:13,818 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-07 01:24:13,818 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-11-07 01:24:13,818 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-07 01:24:13,818 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-07 01:24:13,818 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-07 01:24:13,818 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-07 01:24:13,819 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-07 01:24:13,819 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-07 01:24:13,819 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-07 01:24:14,205 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-07 01:24:14,206 INFO L284 CfgBuilder]: Removed 6 assume(true) statements. [2019-11-07 01:24:14,207 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:24:14 BoogieIcfgContainer [2019-11-07 01:24:14,207 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-07 01:24:14,208 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-07 01:24:14,209 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-07 01:24:14,212 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-07 01:24:14,212 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:24:13" (1/3) ... [2019-11-07 01:24:14,213 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54b1cf24 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:24:14, skipping insertion in model container [2019-11-07 01:24:14,213 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:24:13" (2/3) ... [2019-11-07 01:24:14,213 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54b1cf24 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:24:14, skipping insertion in model container [2019-11-07 01:24:14,214 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:24:14" (3/3) ... [2019-11-07 01:24:14,215 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_init5_ground-1.i [2019-11-07 01:24:14,223 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-07 01:24:14,231 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-07 01:24:14,243 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-07 01:24:14,269 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-07 01:24:14,269 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-07 01:24:14,269 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-07 01:24:14,269 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-07 01:24:14,270 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-07 01:24:14,270 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-07 01:24:14,270 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-07 01:24:14,270 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-07 01:24:14,284 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2019-11-07 01:24:14,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-07 01:24:14,289 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:24:14,290 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:24:14,292 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:24:14,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:24:14,296 INFO L82 PathProgramCache]: Analyzing trace with hash 2033634507, now seen corresponding path program 1 times [2019-11-07 01:24:14,304 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:24:14,305 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131782553] [2019-11-07 01:24:14,305 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:24:14,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:24:14,483 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 01:24:14,484 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131782553] [2019-11-07 01:24:14,485 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 01:24:14,485 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-07 01:24:14,486 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355156909] [2019-11-07 01:24:14,492 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 01:24:14,492 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:24:14,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 01:24:14,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 01:24:14,511 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 3 states. [2019-11-07 01:24:14,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:24:14,618 INFO L93 Difference]: Finished difference Result 43 states and 60 transitions. [2019-11-07 01:24:14,620 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 01:24:14,621 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2019-11-07 01:24:14,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:24:14,632 INFO L225 Difference]: With dead ends: 43 [2019-11-07 01:24:14,632 INFO L226 Difference]: Without dead ends: 24 [2019-11-07 01:24:14,638 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 01:24:14,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-11-07 01:24:14,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2019-11-07 01:24:14,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-11-07 01:24:14,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2019-11-07 01:24:14,695 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 15 [2019-11-07 01:24:14,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:24:14,696 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2019-11-07 01:24:14,697 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 01:24:14,697 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2019-11-07 01:24:14,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-11-07 01:24:14,700 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:24:14,700 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] [2019-11-07 01:24:14,701 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:24:14,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:24:14,703 INFO L82 PathProgramCache]: Analyzing trace with hash -2054156691, now seen corresponding path program 1 times [2019-11-07 01:24:14,703 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:24:14,703 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167093765] [2019-11-07 01:24:14,703 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:24:14,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:24:14,857 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-07 01:24:14,857 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167093765] [2019-11-07 01:24:14,858 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787741466] [2019-11-07 01:24:14,861 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 01:24:14,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:24:14,940 INFO L256 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 01:24:14,949 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:24:14,984 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-07 01:24:14,985 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:24:15,033 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-07 01:24:15,034 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [228983752] [2019-11-07 01:24:15,083 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2019-11-07 01:24:15,084 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:24:15,099 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:24:15,114 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:24:15,115 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:24:15,265 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 01:24:15,962 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 28 for LOIs [2019-11-07 01:24:15,974 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 01:24:15,977 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:24:16,405 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 01:24:16,406 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 10] total 17 [2019-11-07 01:24:16,407 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910530762] [2019-11-07 01:24:16,409 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-11-07 01:24:16,409 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:24:16,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-11-07 01:24:16,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2019-11-07 01:24:16,413 INFO L87 Difference]: Start difference. First operand 24 states and 29 transitions. Second operand 17 states. [2019-11-07 01:24:17,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:24:17,240 INFO L93 Difference]: Finished difference Result 65 states and 89 transitions. [2019-11-07 01:24:17,241 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-07 01:24:17,241 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2019-11-07 01:24:17,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:24:17,243 INFO L225 Difference]: With dead ends: 65 [2019-11-07 01:24:17,243 INFO L226 Difference]: Without dead ends: 48 [2019-11-07 01:24:17,244 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=141, Invalid=615, Unknown=0, NotChecked=0, Total=756 [2019-11-07 01:24:17,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2019-11-07 01:24:17,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 39. [2019-11-07 01:24:17,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-11-07 01:24:17,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 44 transitions. [2019-11-07 01:24:17,264 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 44 transitions. Word has length 20 [2019-11-07 01:24:17,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:24:17,264 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 44 transitions. [2019-11-07 01:24:17,265 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-11-07 01:24:17,265 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 44 transitions. [2019-11-07 01:24:17,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-11-07 01:24:17,271 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:24:17,272 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:24:17,476 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:24:17,476 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:24:17,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:24:17,476 INFO L82 PathProgramCache]: Analyzing trace with hash -1023410357, now seen corresponding path program 2 times [2019-11-07 01:24:17,477 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:24:17,477 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886048693] [2019-11-07 01:24:17,477 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:24:17,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:24:17,603 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2019-11-07 01:24:17,603 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886048693] [2019-11-07 01:24:17,603 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075865876] [2019-11-07 01:24:17,605 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 01:24:17,681 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-07 01:24:17,681 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-07 01:24:17,683 INFO L256 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-07 01:24:17,687 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:24:17,704 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2019-11-07 01:24:17,705 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:24:17,779 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2019-11-07 01:24:17,780 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1633571893] [2019-11-07 01:24:17,783 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2019-11-07 01:24:17,783 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:24:17,784 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:24:17,785 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:24:17,785 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:24:17,829 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 01:24:18,287 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 28 for LOIs [2019-11-07 01:24:18,294 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 01:24:18,295 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:24:18,640 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 01:24:18,640 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 10] total 23 [2019-11-07 01:24:18,641 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596532607] [2019-11-07 01:24:18,642 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-11-07 01:24:18,642 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:24:18,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-11-07 01:24:18,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=399, Unknown=0, NotChecked=0, Total=506 [2019-11-07 01:24:18,643 INFO L87 Difference]: Start difference. First operand 39 states and 44 transitions. Second operand 23 states. [2019-11-07 01:24:19,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:24:19,653 INFO L93 Difference]: Finished difference Result 107 states and 146 transitions. [2019-11-07 01:24:19,653 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-11-07 01:24:19,653 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 35 [2019-11-07 01:24:19,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:24:19,655 INFO L225 Difference]: With dead ends: 107 [2019-11-07 01:24:19,655 INFO L226 Difference]: Without dead ends: 78 [2019-11-07 01:24:19,656 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 404 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=312, Invalid=1248, Unknown=0, NotChecked=0, Total=1560 [2019-11-07 01:24:19,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2019-11-07 01:24:19,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 69. [2019-11-07 01:24:19,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2019-11-07 01:24:19,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 74 transitions. [2019-11-07 01:24:19,670 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 74 transitions. Word has length 35 [2019-11-07 01:24:19,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:24:19,671 INFO L462 AbstractCegarLoop]: Abstraction has 69 states and 74 transitions. [2019-11-07 01:24:19,671 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-11-07 01:24:19,671 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 74 transitions. [2019-11-07 01:24:19,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2019-11-07 01:24:19,673 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:24:19,673 INFO L410 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:24:19,877 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:24:19,877 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:24:19,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:24:19,878 INFO L82 PathProgramCache]: Analyzing trace with hash -1871527157, now seen corresponding path program 3 times [2019-11-07 01:24:19,878 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:24:19,878 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795391198] [2019-11-07 01:24:19,878 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:24:20,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:24:20,174 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2019-11-07 01:24:20,174 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795391198] [2019-11-07 01:24:20,175 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963572451] [2019-11-07 01:24:20,175 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 01:24:20,259 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-07 01:24:20,259 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-07 01:24:20,261 INFO L256 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-07 01:24:20,267 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:24:20,289 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2019-11-07 01:24:20,290 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:24:20,542 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2019-11-07 01:24:20,543 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1417334608] [2019-11-07 01:24:20,545 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2019-11-07 01:24:20,545 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:24:20,545 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:24:20,546 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:24:20,546 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:24:20,570 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 01:24:20,912 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 28 for LOIs [2019-11-07 01:24:20,920 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 01:24:20,921 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:24:21,272 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 01:24:21,272 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13, 10] total 35 [2019-11-07 01:24:21,273 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215386552] [2019-11-07 01:24:21,274 INFO L442 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-11-07 01:24:21,274 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:24:21,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-11-07 01:24:21,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=329, Invalid=861, Unknown=0, NotChecked=0, Total=1190 [2019-11-07 01:24:21,275 INFO L87 Difference]: Start difference. First operand 69 states and 74 transitions. Second operand 35 states. [2019-11-07 01:24:23,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:24:23,196 INFO L93 Difference]: Finished difference Result 191 states and 260 transitions. [2019-11-07 01:24:23,196 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-11-07 01:24:23,196 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 65 [2019-11-07 01:24:23,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:24:23,197 INFO L225 Difference]: With dead ends: 191 [2019-11-07 01:24:23,198 INFO L226 Difference]: Without dead ends: 138 [2019-11-07 01:24:23,199 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1007 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=978, Invalid=3054, Unknown=0, NotChecked=0, Total=4032 [2019-11-07 01:24:23,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2019-11-07 01:24:23,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 129. [2019-11-07 01:24:23,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2019-11-07 01:24:23,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 134 transitions. [2019-11-07 01:24:23,220 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 134 transitions. Word has length 65 [2019-11-07 01:24:23,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:24:23,220 INFO L462 AbstractCegarLoop]: Abstraction has 129 states and 134 transitions. [2019-11-07 01:24:23,221 INFO L463 AbstractCegarLoop]: Interpolant automaton has 35 states. [2019-11-07 01:24:23,221 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 134 transitions. [2019-11-07 01:24:23,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2019-11-07 01:24:23,223 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:24:23,223 INFO L410 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:24:23,434 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:24:23,435 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:24:23,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:24:23,436 INFO L82 PathProgramCache]: Analyzing trace with hash -1693517173, now seen corresponding path program 4 times [2019-11-07 01:24:23,436 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:24:23,437 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602447970] [2019-11-07 01:24:23,437 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:24:23,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:24:23,878 INFO L134 CoverageAnalysis]: Checked inductivity of 1265 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 1012 trivial. 0 not checked. [2019-11-07 01:24:23,878 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602447970] [2019-11-07 01:24:23,879 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972732339] [2019-11-07 01:24:23,879 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 01:24:23,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:24:23,997 INFO L256 TraceCheckSpWp]: Trace formula consists of 503 conjuncts, 24 conjunts are in the unsatisfiable core [2019-11-07 01:24:24,003 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:24:24,029 INFO L134 CoverageAnalysis]: Checked inductivity of 1265 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 1012 trivial. 0 not checked. [2019-11-07 01:24:24,030 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:24:24,695 INFO L134 CoverageAnalysis]: Checked inductivity of 1265 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 1012 trivial. 0 not checked. [2019-11-07 01:24:24,695 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [376640090] [2019-11-07 01:24:24,697 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2019-11-07 01:24:24,697 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:24:24,698 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:24:24,698 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:24:24,698 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:24:24,726 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 01:24:24,994 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 28 for LOIs [2019-11-07 01:24:24,999 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 01:24:25,001 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:24:25,405 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 01:24:25,406 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25, 10] total 59 [2019-11-07 01:24:25,406 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676909441] [2019-11-07 01:24:25,408 INFO L442 AbstractCegarLoop]: Interpolant automaton has 59 states [2019-11-07 01:24:25,408 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:24:25,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2019-11-07 01:24:25,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1205, Invalid=2217, Unknown=0, NotChecked=0, Total=3422 [2019-11-07 01:24:25,411 INFO L87 Difference]: Start difference. First operand 129 states and 134 transitions. Second operand 59 states. [2019-11-07 01:24:29,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:24:29,873 INFO L93 Difference]: Finished difference Result 359 states and 488 transitions. [2019-11-07 01:24:29,873 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2019-11-07 01:24:29,873 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 125 [2019-11-07 01:24:29,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:24:29,877 INFO L225 Difference]: With dead ends: 359 [2019-11-07 01:24:29,877 INFO L226 Difference]: Without dead ends: 258 [2019-11-07 01:24:29,882 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 453 GetRequests, 343 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 01:24:29,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2019-11-07 01:24:29,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 249. [2019-11-07 01:24:29,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 249 states. [2019-11-07 01:24:29,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 254 transitions. [2019-11-07 01:24:29,913 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 254 transitions. Word has length 125 [2019-11-07 01:24:29,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:24:29,914 INFO L462 AbstractCegarLoop]: Abstraction has 249 states and 254 transitions. [2019-11-07 01:24:29,914 INFO L463 AbstractCegarLoop]: Interpolant automaton has 59 states. [2019-11-07 01:24:29,914 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 254 transitions. [2019-11-07 01:24:29,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2019-11-07 01:24:29,918 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:24:29,919 INFO L410 BasicCegarLoop]: trace histogram [46, 46, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:24:30,124 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:24:30,125 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:24:30,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:24:30,125 INFO L82 PathProgramCache]: Analyzing trace with hash 717367691, now seen corresponding path program 5 times [2019-11-07 01:24:30,126 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:24:30,126 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595083805] [2019-11-07 01:24:30,126 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:24:30,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:24:31,348 INFO L134 CoverageAnalysis]: Checked inductivity of 5405 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 4324 trivial. 0 not checked. [2019-11-07 01:24:31,349 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595083805] [2019-11-07 01:24:31,349 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956388879] [2019-11-07 01:24:31,349 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