/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_copy6_ground-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-07 01:22:22,516 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-07 01:22:22,519 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-07 01:22:22,538 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-07 01:22:22,561 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-07 01:22:22,563 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-07 01:22:22,565 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-07 01:22:22,566 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-07 01:22:22,568 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-07 01:22:22,568 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-07 01:22:22,570 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-07 01:22:22,574 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-07 01:22:22,578 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-07 01:22:22,581 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-07 01:22:22,584 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-07 01:22:22,585 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-07 01:22:22,587 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-07 01:22:22,596 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-07 01:22:22,597 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-07 01:22:22,598 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-07 01:22:22,599 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 01:22:22,625 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-07 01:22:22,626 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-07 01:22:22,627 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-07 01:22:22,627 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-07 01:22:22,627 INFO L138 SettingsManager]: * Use SBE=true [2019-11-07 01:22:22,628 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-07 01:22:22,628 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-07 01:22:22,628 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-07 01:22:22,628 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-07 01:22:22,629 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-07 01:22:22,629 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-07 01:22:22,629 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-07 01:22:22,629 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-07 01:22:22,629 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-07 01:22:22,630 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-07 01:22:22,630 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-07 01:22:22,630 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-07 01:22:22,630 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-07 01:22:22,631 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-07 01:22:22,631 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-07 01:22:22,631 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-07 01:22:22,631 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 01:22:22,632 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-07 01:22:22,632 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-07 01:22:22,632 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-07 01:22:22,632 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-07 01:22:22,632 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-07 01:22:22,633 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-07 01:22:22,633 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 01:22:22,919 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-07 01:22:22,932 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-07 01:22:22,935 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-07 01:22:22,937 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-07 01:22:22,937 INFO L275 PluginConnector]: CDTParser initialized [2019-11-07 01:22:22,938 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_copy6_ground-2.i [2019-11-07 01:22:23,000 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5a5819197/cf8ec014118e4d679d7cfa59f858f8e9/FLAGcf347210f [2019-11-07 01:22:23,458 INFO L306 CDTParser]: Found 1 translation units. [2019-11-07 01:22:23,459 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_copy6_ground-2.i [2019-11-07 01:22:23,466 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5a5819197/cf8ec014118e4d679d7cfa59f858f8e9/FLAGcf347210f [2019-11-07 01:22:23,876 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5a5819197/cf8ec014118e4d679d7cfa59f858f8e9 [2019-11-07 01:22:23,904 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-07 01:22:23,906 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-07 01:22:23,912 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-07 01:22:23,912 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-07 01:22:23,922 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-07 01:22:23,924 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:22:23" (1/1) ... [2019-11-07 01:22:23,929 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3f087c8d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:22:23, skipping insertion in model container [2019-11-07 01:22:23,929 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:22:23" (1/1) ... [2019-11-07 01:22:23,951 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-07 01:22:24,000 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-07 01:22:24,230 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 01:22:24,235 INFO L188 MainTranslator]: Completed pre-run [2019-11-07 01:22:24,261 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 01:22:24,281 INFO L192 MainTranslator]: Completed translation [2019-11-07 01:22:24,281 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:22:24 WrapperNode [2019-11-07 01:22:24,281 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-07 01:22:24,282 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-07 01:22:24,282 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-07 01:22:24,282 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-07 01:22:24,383 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:22:24" (1/1) ... [2019-11-07 01:22:24,383 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:22:24" (1/1) ... [2019-11-07 01:22:24,391 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:22:24" (1/1) ... [2019-11-07 01:22:24,392 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:22:24" (1/1) ... [2019-11-07 01:22:24,402 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:22:24" (1/1) ... [2019-11-07 01:22:24,409 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:22:24" (1/1) ... [2019-11-07 01:22:24,414 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:22:24" (1/1) ... [2019-11-07 01:22:24,418 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-07 01:22:24,418 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-07 01:22:24,418 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-07 01:22:24,419 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-07 01:22:24,420 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:22:24" (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 01:22:24,481 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-07 01:22:24,481 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-07 01:22:24,481 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-11-07 01:22:24,481 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-07 01:22:24,481 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-07 01:22:24,482 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-11-07 01:22:24,482 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-07 01:22:24,482 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-07 01:22:24,482 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-07 01:22:24,482 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-07 01:22:24,483 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-07 01:22:24,483 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-07 01:22:24,483 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-07 01:22:24,483 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-07 01:22:25,020 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-07 01:22:25,021 INFO L284 CfgBuilder]: Removed 8 assume(true) statements. [2019-11-07 01:22:25,022 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:22:25 BoogieIcfgContainer [2019-11-07 01:22:25,022 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-07 01:22:25,023 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-07 01:22:25,023 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-07 01:22:25,026 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-07 01:22:25,027 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:22:23" (1/3) ... [2019-11-07 01:22:25,028 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d178204 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:22:25, skipping insertion in model container [2019-11-07 01:22:25,028 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:22:24" (2/3) ... [2019-11-07 01:22:25,028 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d178204 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:22:25, skipping insertion in model container [2019-11-07 01:22:25,029 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:22:25" (3/3) ... [2019-11-07 01:22:25,030 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_copy6_ground-2.i [2019-11-07 01:22:25,040 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-07 01:22:25,048 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-07 01:22:25,060 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-07 01:22:25,086 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-07 01:22:25,086 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-07 01:22:25,086 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-07 01:22:25,086 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-07 01:22:25,087 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-07 01:22:25,087 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-07 01:22:25,087 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-07 01:22:25,087 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-07 01:22:25,105 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2019-11-07 01:22:25,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-07 01:22:25,110 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:22:25,111 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:22:25,113 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:22:25,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:22:25,119 INFO L82 PathProgramCache]: Analyzing trace with hash 385694572, now seen corresponding path program 1 times [2019-11-07 01:22:25,127 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:22:25,128 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424660450] [2019-11-07 01:22:25,128 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:22:25,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:22:25,315 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 01:22:25,316 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424660450] [2019-11-07 01:22:25,317 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 01:22:25,318 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-07 01:22:25,319 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197268176] [2019-11-07 01:22:25,324 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 01:22:25,325 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:22:25,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 01:22:25,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 01:22:25,344 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 3 states. [2019-11-07 01:22:25,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:22:25,385 INFO L93 Difference]: Finished difference Result 43 states and 60 transitions. [2019-11-07 01:22:25,386 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 01:22:25,388 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2019-11-07 01:22:25,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:22:25,397 INFO L225 Difference]: With dead ends: 43 [2019-11-07 01:22:25,397 INFO L226 Difference]: Without dead ends: 22 [2019-11-07 01:22:25,401 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 01:22:25,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-11-07 01:22:25,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2019-11-07 01:22:25,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-11-07 01:22:25,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 29 transitions. [2019-11-07 01:22:25,449 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 29 transitions. Word has length 17 [2019-11-07 01:22:25,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:22:25,449 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 29 transitions. [2019-11-07 01:22:25,449 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 01:22:25,450 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 29 transitions. [2019-11-07 01:22:25,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-11-07 01:22:25,451 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:22:25,451 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 01:22:25,452 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:22:25,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:22:25,452 INFO L82 PathProgramCache]: Analyzing trace with hash 927885985, now seen corresponding path program 1 times [2019-11-07 01:22:25,453 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:22:25,453 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576730063] [2019-11-07 01:22:25,453 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:22:25,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:22:25,521 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-07 01:22:25,522 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576730063] [2019-11-07 01:22:25,522 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 01:22:25,523 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-07 01:22:25,523 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454254558] [2019-11-07 01:22:25,525 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 01:22:25,525 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:22:25,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 01:22:25,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 01:22:25,526 INFO L87 Difference]: Start difference. First operand 22 states and 29 transitions. Second operand 3 states. [2019-11-07 01:22:25,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:22:25,573 INFO L93 Difference]: Finished difference Result 42 states and 60 transitions. [2019-11-07 01:22:25,574 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 01:22:25,574 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2019-11-07 01:22:25,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:22:25,575 INFO L225 Difference]: With dead ends: 42 [2019-11-07 01:22:25,576 INFO L226 Difference]: Without dead ends: 28 [2019-11-07 01:22:25,577 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 01:22:25,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-11-07 01:22:25,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2019-11-07 01:22:25,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-11-07 01:22:25,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 35 transitions. [2019-11-07 01:22:25,584 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 35 transitions. Word has length 18 [2019-11-07 01:22:25,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:22:25,584 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 35 transitions. [2019-11-07 01:22:25,584 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 01:22:25,585 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 35 transitions. [2019-11-07 01:22:25,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-11-07 01:22:25,586 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:22:25,586 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] [2019-11-07 01:22:25,586 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:22:25,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:22:25,587 INFO L82 PathProgramCache]: Analyzing trace with hash 1980665252, now seen corresponding path program 1 times [2019-11-07 01:22:25,587 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:22:25,587 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740632481] [2019-11-07 01:22:25,587 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:22:25,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:22:25,730 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-07 01:22:25,730 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740632481] [2019-11-07 01:22:25,731 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802555755] [2019-11-07 01:22:25,731 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 01:22:25,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:22:25,808 INFO L256 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 01:22:25,815 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:22:25,858 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-07 01:22:25,858 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:22:25,910 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-07 01:22:25,910 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1798271783] [2019-11-07 01:22:25,965 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2019-11-07 01:22:25,965 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:22:25,989 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:22:25,997 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:22:25,998 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:22:26,160 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 01:22:26,551 WARN L191 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 41 [2019-11-07 01:22:26,834 WARN L191 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 41 [2019-11-07 01:22:27,789 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 29 for LOIs [2019-11-07 01:22:27,801 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 01:22:27,806 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:22:28,137 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 01:22:28,137 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 11] total 18 [2019-11-07 01:22:28,140 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269639369] [2019-11-07 01:22:28,143 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-11-07 01:22:28,143 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:22:28,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-11-07 01:22:28,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2019-11-07 01:22:28,146 INFO L87 Difference]: Start difference. First operand 28 states and 35 transitions. Second operand 18 states. [2019-11-07 01:22:28,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:22:28,917 INFO L93 Difference]: Finished difference Result 67 states and 89 transitions. [2019-11-07 01:22:28,918 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-11-07 01:22:28,919 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 24 [2019-11-07 01:22:28,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:22:28,921 INFO L225 Difference]: With dead ends: 67 [2019-11-07 01:22:28,921 INFO L226 Difference]: Without dead ends: 46 [2019-11-07 01:22:28,922 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=145, Invalid=785, Unknown=0, NotChecked=0, Total=930 [2019-11-07 01:22:28,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2019-11-07 01:22:28,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 37. [2019-11-07 01:22:28,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-11-07 01:22:28,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 44 transitions. [2019-11-07 01:22:28,931 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 44 transitions. Word has length 24 [2019-11-07 01:22:28,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:22:28,932 INFO L462 AbstractCegarLoop]: Abstraction has 37 states and 44 transitions. [2019-11-07 01:22:28,932 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-11-07 01:22:28,932 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 44 transitions. [2019-11-07 01:22:28,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-11-07 01:22:28,933 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:22:28,933 INFO L410 BasicCegarLoop]: trace histogram [4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:22:29,136 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:22:29,137 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:22:29,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:22:29,138 INFO L82 PathProgramCache]: Analyzing trace with hash -1231684532, now seen corresponding path program 2 times [2019-11-07 01:22:29,138 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:22:29,139 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602903283] [2019-11-07 01:22:29,139 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:22:29,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:22:29,302 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-11-07 01:22:29,302 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602903283] [2019-11-07 01:22:29,303 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [736878219] [2019-11-07 01:22:29,303 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 01:22:29,386 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-11-07 01:22:29,386 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-07 01:22:29,388 INFO L256 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-07 01:22:29,395 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:22:29,419 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2019-11-07 01:22:29,419 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:22:29,473 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2019-11-07 01:22:29,474 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1815938833] [2019-11-07 01:22:29,475 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2019-11-07 01:22:29,476 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:22:29,476 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:22:29,476 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:22:29,477 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:22:29,494 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 01:22:30,103 WARN L191 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 41 [2019-11-07 01:22:30,483 WARN L191 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 41 [2019-11-07 01:22:30,684 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 29 for LOIs [2019-11-07 01:22:30,689 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 01:22:30,690 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:22:30,947 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 01:22:30,947 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5, 11] total 23 [2019-11-07 01:22:30,948 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322816659] [2019-11-07 01:22:30,949 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-11-07 01:22:30,949 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:22:30,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-11-07 01:22:30,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2019-11-07 01:22:30,951 INFO L87 Difference]: Start difference. First operand 37 states and 44 transitions. Second operand 23 states. [2019-11-07 01:22:32,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:22:32,142 INFO L93 Difference]: Finished difference Result 98 states and 136 transitions. [2019-11-07 01:22:32,143 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-11-07 01:22:32,143 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 33 [2019-11-07 01:22:32,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:22:32,145 INFO L225 Difference]: With dead ends: 98 [2019-11-07 01:22:32,145 INFO L226 Difference]: Without dead ends: 71 [2019-11-07 01:22:32,147 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 373 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=237, Invalid=1403, Unknown=0, NotChecked=0, Total=1640 [2019-11-07 01:22:32,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2019-11-07 01:22:32,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 62. [2019-11-07 01:22:32,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2019-11-07 01:22:32,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 69 transitions. [2019-11-07 01:22:32,159 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 69 transitions. Word has length 33 [2019-11-07 01:22:32,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:22:32,159 INFO L462 AbstractCegarLoop]: Abstraction has 62 states and 69 transitions. [2019-11-07 01:22:32,159 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-11-07 01:22:32,159 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 69 transitions. [2019-11-07 01:22:32,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2019-11-07 01:22:32,161 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:22:32,161 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:22:32,364 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:22:32,365 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:22:32,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:22:32,366 INFO L82 PathProgramCache]: Analyzing trace with hash -652484159, now seen corresponding path program 3 times [2019-11-07 01:22:32,367 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:22:32,367 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996655088] [2019-11-07 01:22:32,367 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:22:32,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:22:32,497 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2019-11-07 01:22:32,497 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996655088] [2019-11-07 01:22:32,498 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [672399981] [2019-11-07 01:22:32,498 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 01:22:32,587 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-07 01:22:32,588 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-07 01:22:32,589 INFO L256 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-07 01:22:32,593 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:22:32,612 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2019-11-07 01:22:32,612 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:22:32,691 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2019-11-07 01:22:32,692 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1535597334] [2019-11-07 01:22:32,695 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2019-11-07 01:22:32,695 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:22:32,699 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:22:32,699 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:22:32,699 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:22:32,723 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 01:22:32,962 WARN L191 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 41 [2019-11-07 01:22:33,179 WARN L191 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 38 [2019-11-07 01:22:33,984 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 29 for LOIs [2019-11-07 01:22:33,998 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 01:22:33,999 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:22:34,283 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 01:22:34,283 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 11] total 25 [2019-11-07 01:22:34,284 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016964139] [2019-11-07 01:22:34,285 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-11-07 01:22:34,285 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:22:34,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-11-07 01:22:34,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=466, Unknown=0, NotChecked=0, Total=600 [2019-11-07 01:22:34,286 INFO L87 Difference]: Start difference. First operand 62 states and 69 transitions. Second operand 25 states. [2019-11-07 01:22:35,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:22:35,107 INFO L93 Difference]: Finished difference Result 129 states and 149 transitions. [2019-11-07 01:22:35,112 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-11-07 01:22:35,112 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 58 [2019-11-07 01:22:35,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:22:35,114 INFO L225 Difference]: With dead ends: 129 [2019-11-07 01:22:35,114 INFO L226 Difference]: Without dead ends: 78 [2019-11-07 01:22:35,116 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 504 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=369, Invalid=1523, Unknown=0, NotChecked=0, Total=1892 [2019-11-07 01:22:35,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2019-11-07 01:22:35,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 69. [2019-11-07 01:22:35,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2019-11-07 01:22:35,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 76 transitions. [2019-11-07 01:22:35,128 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 76 transitions. Word has length 58 [2019-11-07 01:22:35,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:22:35,128 INFO L462 AbstractCegarLoop]: Abstraction has 69 states and 76 transitions. [2019-11-07 01:22:35,128 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-11-07 01:22:35,128 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 76 transitions. [2019-11-07 01:22:35,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2019-11-07 01:22:35,130 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:22:35,130 INFO L410 BasicCegarLoop]: trace histogram [12, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:22:35,335 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:22:35,335 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:22:35,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:22:35,336 INFO L82 PathProgramCache]: Analyzing trace with hash -1192954356, now seen corresponding path program 4 times [2019-11-07 01:22:35,336 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:22:35,336 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273366814] [2019-11-07 01:22:35,336 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:22:35,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:22:35,734 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2019-11-07 01:22:35,735 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273366814] [2019-11-07 01:22:35,735 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731934126] [2019-11-07 01:22:35,735 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 01:22:35,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:22:35,912 INFO L256 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-07 01:22:35,925 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:22:35,946 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2019-11-07 01:22:35,946 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:22:36,199 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2019-11-07 01:22:36,200 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [945571916] [2019-11-07 01:22:36,201 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2019-11-07 01:22:36,201 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:22:36,202 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:22:36,202 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:22:36,202 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:22:36,221 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 01:22:37,467 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 29 for LOIs [2019-11-07 01:22:37,485 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 01:22:37,488 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:22:37,760 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 01:22:37,761 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15, 11] total 39 [2019-11-07 01:22:37,761 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713925652] [2019-11-07 01:22:37,762 INFO L442 AbstractCegarLoop]: Interpolant automaton has 39 states [2019-11-07 01:22:37,762 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:22:37,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2019-11-07 01:22:37,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=1047, Unknown=0, NotChecked=0, Total=1482 [2019-11-07 01:22:37,763 INFO L87 Difference]: Start difference. First operand 69 states and 76 transitions. Second operand 39 states. [2019-11-07 01:22:39,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:22:39,237 INFO L93 Difference]: Finished difference Result 143 states and 170 transitions. [2019-11-07 01:22:39,238 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2019-11-07 01:22:39,238 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 65 [2019-11-07 01:22:39,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:22:39,240 INFO L225 Difference]: With dead ends: 143 [2019-11-07 01:22:39,240 INFO L226 Difference]: Without dead ends: 92 [2019-11-07 01:22:39,243 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1274 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1244, Invalid=3868, Unknown=0, NotChecked=0, Total=5112 [2019-11-07 01:22:39,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2019-11-07 01:22:39,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 83. [2019-11-07 01:22:39,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-11-07 01:22:39,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 90 transitions. [2019-11-07 01:22:39,256 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 90 transitions. Word has length 65 [2019-11-07 01:22:39,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:22:39,257 INFO L462 AbstractCegarLoop]: Abstraction has 83 states and 90 transitions. [2019-11-07 01:22:39,257 INFO L463 AbstractCegarLoop]: Interpolant automaton has 39 states. [2019-11-07 01:22:39,257 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 90 transitions. [2019-11-07 01:22:39,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2019-11-07 01:22:39,259 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:22:39,259 INFO L410 BasicCegarLoop]: trace histogram [26, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:22:39,463 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:22:39,463 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:22:39,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:22:39,464 INFO L82 PathProgramCache]: Analyzing trace with hash -1089225620, now seen corresponding path program 5 times [2019-11-07 01:22:39,464 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:22:39,464 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166622094] [2019-11-07 01:22:39,465 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:22:39,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:22:40,271 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2019-11-07 01:22:40,271 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166622094] [2019-11-07 01:22:40,271 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1400667540] [2019-11-07 01:22:40,271 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 [2019-11-07 01:22:41,648 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-11-07 01:22:41,648 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-07 01:22:41,652 INFO L256 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-07 01:22:41,656 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:22:41,810 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 456 trivial. 0 not checked. [2019-11-07 01:22:41,810 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:22:41,982 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 456 trivial. 0 not checked. [2019-11-07 01:22:41,983 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [145387795] [2019-11-07 01:22:41,984 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2019-11-07 01:22:41,984 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:22:41,985 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:22:41,985 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:22:41,985 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:22:41,999 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 01:22:43,204 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 29 for LOIs [2019-11-07 01:22:43,210 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 01:22:43,215 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:22:43,686 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 01:22:43,686 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 9, 9, 11] total 53 [2019-11-07 01:22:43,687 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124067497] [2019-11-07 01:22:43,688 INFO L442 AbstractCegarLoop]: Interpolant automaton has 53 states [2019-11-07 01:22:43,688 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:22:43,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2019-11-07 01:22:43,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=554, Invalid=2202, Unknown=0, NotChecked=0, Total=2756 [2019-11-07 01:22:43,690 INFO L87 Difference]: Start difference. First operand 83 states and 90 transitions. Second operand 53 states. [2019-11-07 01:22:47,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:22:47,054 INFO L93 Difference]: Finished difference Result 192 states and 254 transitions. [2019-11-07 01:22:47,055 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2019-11-07 01:22:47,055 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 79 [2019-11-07 01:22:47,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:22:47,058 INFO L225 Difference]: With dead ends: 192 [2019-11-07 01:22:47,058 INFO L226 Difference]: Without dead ends: 141 [2019-11-07 01:22:47,062 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 215 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2334 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=1684, Invalid=8416, Unknown=0, NotChecked=0, Total=10100 [2019-11-07 01:22:47,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2019-11-07 01:22:47,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 132. [2019-11-07 01:22:47,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2019-11-07 01:22:47,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 139 transitions. [2019-11-07 01:22:47,081 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 139 transitions. Word has length 79 [2019-11-07 01:22:47,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:22:47,082 INFO L462 AbstractCegarLoop]: Abstraction has 132 states and 139 transitions. [2019-11-07 01:22:47,082 INFO L463 AbstractCegarLoop]: Interpolant automaton has 53 states. [2019-11-07 01:22:47,082 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 139 transitions. [2019-11-07 01:22:47,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2019-11-07 01:22:47,084 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:22:47,085 INFO L410 BasicCegarLoop]: trace histogram [27, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:22:47,290 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:22:47,291 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:22:47,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:22:47,292 INFO L82 PathProgramCache]: Analyzing trace with hash 1390226785, now seen corresponding path program 6 times [2019-11-07 01:22:47,292 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:22:47,293 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113738740] [2019-11-07 01:22:47,293 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:22:47,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:22:47,826 INFO L134 CoverageAnalysis]: Checked inductivity of 1008 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 630 trivial. 0 not checked. [2019-11-07 01:22:47,826 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113738740] [2019-11-07 01:22:47,827 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927798798] [2019-11-07 01:22:47,827 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:22:47,983 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-07 01:22:47,983 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-07 01:22:47,985 INFO L256 TraceCheckSpWp]: Trace formula consists of 605 conjuncts, 29 conjunts are in the unsatisfiable core [2019-11-07 01:22:47,991 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:22:48,029 INFO L134 CoverageAnalysis]: Checked inductivity of 1008 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 630 trivial. 0 not checked. [2019-11-07 01:22:48,029 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:22:49,022 INFO L134 CoverageAnalysis]: Checked inductivity of 1008 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 630 trivial. 0 not checked. [2019-11-07 01:22:49,023 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1391044290] [2019-11-07 01:22:49,024 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2019-11-07 01:22:49,024 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:22:49,025 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:22:49,025 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:22:49,025 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:22:49,047 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 01:22:49,462 WARN L191 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 38 [2019-11-07 01:22:49,687 WARN L191 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 38 [2019-11-07 01:22:50,080 WARN L191 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 41 [2019-11-07 01:22:50,433 WARN L191 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 38 [2019-11-07 01:22:50,653 WARN L191 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 38 [2019-11-07 01:22:50,696 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 29 for LOIs [2019-11-07 01:22:50,700 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 01:22:50,702 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:22:51,063 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 01:22:51,064 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30, 11] total 69 [2019-11-07 01:22:51,064 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897054867] [2019-11-07 01:22:51,065 INFO L442 AbstractCegarLoop]: Interpolant automaton has 69 states [2019-11-07 01:22:51,065 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:22:51,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2019-11-07 01:22:51,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1740, Invalid=2952, Unknown=0, NotChecked=0, Total=4692 [2019-11-07 01:22:51,068 INFO L87 Difference]: Start difference. First operand 132 states and 139 transitions. Second operand 69 states. [2019-11-07 01:22:54,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:22:54,728 INFO L93 Difference]: Finished difference Result 269 states and 311 transitions. [2019-11-07 01:22:54,728 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2019-11-07 01:22:54,728 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 128 [2019-11-07 01:22:54,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:22:54,730 INFO L225 Difference]: With dead ends: 269 [2019-11-07 01:22:54,730 INFO L226 Difference]: Without dead ends: 170 [2019-11-07 01:22:54,736 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 477 GetRequests, 347 SyntacticMatches, 0 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3749 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=5099, Invalid=12193, Unknown=0, NotChecked=0, Total=17292 [2019-11-07 01:22:54,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2019-11-07 01:22:54,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 161. [2019-11-07 01:22:54,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2019-11-07 01:22:54,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 168 transitions. [2019-11-07 01:22:54,756 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 168 transitions. Word has length 128 [2019-11-07 01:22:54,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:22:54,757 INFO L462 AbstractCegarLoop]: Abstraction has 161 states and 168 transitions. [2019-11-07 01:22:54,757 INFO L463 AbstractCegarLoop]: Interpolant automaton has 69 states. [2019-11-07 01:22:54,757 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 168 transitions. [2019-11-07 01:22:54,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2019-11-07 01:22:54,760 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:22:54,760 INFO L410 BasicCegarLoop]: trace histogram [56, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:22:54,965 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:22:54,966 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:22:54,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:22:54,966 INFO L82 PathProgramCache]: Analyzing trace with hash -412242356, now seen corresponding path program 7 times [2019-11-07 01:22:54,966 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:22:54,966 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348380866] [2019-11-07 01:22:54,967 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:22:55,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:22:56,405 INFO L134 CoverageAnalysis]: Checked inductivity of 2226 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 630 trivial. 0 not checked. [2019-11-07 01:22:56,405 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348380866] [2019-11-07 01:22:56,405 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081580711] [2019-11-07 01:22:56,406 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:22:56,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:22:56,612 INFO L256 TraceCheckSpWp]: Trace formula consists of 779 conjuncts, 58 conjunts are in the unsatisfiable core [2019-11-07 01:22:56,616 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:22:56,654 INFO L134 CoverageAnalysis]: Checked inductivity of 2226 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 630 trivial. 0 not checked. [2019-11-07 01:22:56,654 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:23:00,613 INFO L134 CoverageAnalysis]: Checked inductivity of 2226 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 630 trivial. 0 not checked. [2019-11-07 01:23:00,614 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [197084391] [2019-11-07 01:23:00,623 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2019-11-07 01:23:00,624 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:23:00,625 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:23:00,625 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:23:00,625 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:23:00,646 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 01:23:01,853 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 29 for LOIs [2019-11-07 01:23:01,857 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 01:23:01,858 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:23:02,370 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 01:23:02,371 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59, 59, 11] total 127 [2019-11-07 01:23:02,371 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997600379] [2019-11-07 01:23:02,373 INFO L442 AbstractCegarLoop]: Interpolant automaton has 127 states [2019-11-07 01:23:02,373 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:23:02,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 127 interpolants. [2019-11-07 01:23:02,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6815, Invalid=9187, Unknown=0, NotChecked=0, Total=16002 [2019-11-07 01:23:02,379 INFO L87 Difference]: Start difference. First operand 161 states and 168 transitions. Second operand 127 states.