/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-tiling/rew.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-07 01:33:01,184 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-07 01:33:01,188 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-07 01:33:01,206 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-07 01:33:01,231 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-07 01:33:01,233 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-07 01:33:01,235 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-07 01:33:01,237 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-07 01:33:01,238 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-07 01:33:01,240 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-07 01:33:01,242 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-07 01:33:01,246 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-07 01:33:01,250 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-07 01:33:01,253 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-07 01:33:01,255 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-07 01:33:01,256 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-07 01:33:01,258 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-07 01:33:01,267 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-07 01:33:01,268 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-07 01:33:01,269 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-07 01:33:01,269 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 01:33:01,302 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-07 01:33:01,302 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-07 01:33:01,303 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-07 01:33:01,304 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-07 01:33:01,304 INFO L138 SettingsManager]: * Use SBE=true [2019-11-07 01:33:01,304 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-07 01:33:01,304 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-07 01:33:01,305 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-07 01:33:01,305 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-07 01:33:01,305 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-07 01:33:01,305 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-07 01:33:01,305 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-07 01:33:01,305 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-07 01:33:01,307 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-07 01:33:01,308 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-07 01:33:01,308 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-07 01:33:01,308 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-07 01:33:01,308 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-07 01:33:01,308 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-07 01:33:01,309 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-07 01:33:01,309 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-07 01:33:01,309 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 01:33:01,309 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-07 01:33:01,309 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-07 01:33:01,310 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-07 01:33:01,310 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-07 01:33:01,310 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-07 01:33:01,310 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-07 01:33:01,310 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 01:33:01,599 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-07 01:33:01,612 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-07 01:33:01,616 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-07 01:33:01,617 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-07 01:33:01,617 INFO L275 PluginConnector]: CDTParser initialized [2019-11-07 01:33:01,618 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-tiling/rew.c [2019-11-07 01:33:01,680 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/101c3b5ca/f0349a1a260d4dba9ae347f5ef8c9267/FLAG922bf4589 [2019-11-07 01:33:02,112 INFO L306 CDTParser]: Found 1 translation units. [2019-11-07 01:33:02,112 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-tiling/rew.c [2019-11-07 01:33:02,119 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/101c3b5ca/f0349a1a260d4dba9ae347f5ef8c9267/FLAG922bf4589 [2019-11-07 01:33:02,527 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/101c3b5ca/f0349a1a260d4dba9ae347f5ef8c9267 [2019-11-07 01:33:02,554 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-07 01:33:02,556 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-07 01:33:02,559 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-07 01:33:02,559 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-07 01:33:02,568 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-07 01:33:02,572 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:33:02" (1/1) ... [2019-11-07 01:33:02,580 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@612b7718 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:33:02, skipping insertion in model container [2019-11-07 01:33:02,581 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:33:02" (1/1) ... [2019-11-07 01:33:02,600 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-07 01:33:02,643 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-07 01:33:02,965 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 01:33:02,975 INFO L188 MainTranslator]: Completed pre-run [2019-11-07 01:33:02,990 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 01:33:03,003 INFO L192 MainTranslator]: Completed translation [2019-11-07 01:33:03,004 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:33:03 WrapperNode [2019-11-07 01:33:03,004 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-07 01:33:03,004 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-07 01:33:03,004 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-07 01:33:03,005 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-07 01:33:03,097 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:33:03" (1/1) ... [2019-11-07 01:33:03,097 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:33:03" (1/1) ... [2019-11-07 01:33:03,105 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:33:03" (1/1) ... [2019-11-07 01:33:03,106 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:33:03" (1/1) ... [2019-11-07 01:33:03,113 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:33:03" (1/1) ... [2019-11-07 01:33:03,118 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:33:03" (1/1) ... [2019-11-07 01:33:03,119 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:33:03" (1/1) ... [2019-11-07 01:33:03,121 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-07 01:33:03,122 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-07 01:33:03,122 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-07 01:33:03,122 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-07 01:33:03,123 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:33:03" (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 01:33:03,176 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-07 01:33:03,176 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-07 01:33:03,176 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-11-07 01:33:03,177 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-07 01:33:03,177 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-07 01:33:03,177 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-11-07 01:33:03,177 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-11-07 01:33:03,177 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-07 01:33:03,177 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-11-07 01:33:03,178 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-07 01:33:03,178 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-07 01:33:03,178 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-07 01:33:03,178 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-07 01:33:03,178 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-07 01:33:03,179 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-07 01:33:03,179 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-07 01:33:03,547 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-07 01:33:03,548 INFO L284 CfgBuilder]: Removed 2 assume(true) statements. [2019-11-07 01:33:03,549 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:33:03 BoogieIcfgContainer [2019-11-07 01:33:03,549 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-07 01:33:03,550 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-07 01:33:03,551 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-07 01:33:03,555 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-07 01:33:03,556 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:33:02" (1/3) ... [2019-11-07 01:33:03,557 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c54ac6f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:33:03, skipping insertion in model container [2019-11-07 01:33:03,557 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:33:03" (2/3) ... [2019-11-07 01:33:03,557 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c54ac6f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:33:03, skipping insertion in model container [2019-11-07 01:33:03,557 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:33:03" (3/3) ... [2019-11-07 01:33:03,559 INFO L109 eAbstractionObserver]: Analyzing ICFG rew.c [2019-11-07 01:33:03,566 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-07 01:33:03,572 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-07 01:33:03,582 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-07 01:33:03,603 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-07 01:33:03,603 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-07 01:33:03,603 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-07 01:33:03,603 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-07 01:33:03,603 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-07 01:33:03,604 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-07 01:33:03,604 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-07 01:33:03,604 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-07 01:33:03,617 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2019-11-07 01:33:03,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-11-07 01:33:03,622 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:33:03,622 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:33:03,624 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:33:03,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:33:03,629 INFO L82 PathProgramCache]: Analyzing trace with hash -1799181545, now seen corresponding path program 1 times [2019-11-07 01:33:03,637 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:33:03,637 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025009579] [2019-11-07 01:33:03,638 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:33:03,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:33:03,848 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 01:33:03,849 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025009579] [2019-11-07 01:33:03,851 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 01:33:03,851 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-07 01:33:03,853 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460960271] [2019-11-07 01:33:03,861 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 01:33:03,862 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:33:03,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 01:33:03,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 01:33:03,884 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 3 states. [2019-11-07 01:33:03,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:33:03,964 INFO L93 Difference]: Finished difference Result 34 states and 40 transitions. [2019-11-07 01:33:03,965 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 01:33:03,967 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2019-11-07 01:33:03,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:33:03,977 INFO L225 Difference]: With dead ends: 34 [2019-11-07 01:33:03,978 INFO L226 Difference]: Without dead ends: 17 [2019-11-07 01:33:03,983 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 01:33:04,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2019-11-07 01:33:04,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2019-11-07 01:33:04,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-11-07 01:33:04,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2019-11-07 01:33:04,040 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 12 [2019-11-07 01:33:04,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:33:04,041 INFO L462 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2019-11-07 01:33:04,042 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 01:33:04,042 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2019-11-07 01:33:04,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-11-07 01:33:04,043 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:33:04,044 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:33:04,044 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:33:04,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:33:04,045 INFO L82 PathProgramCache]: Analyzing trace with hash -623938133, now seen corresponding path program 1 times [2019-11-07 01:33:04,045 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:33:04,046 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737741486] [2019-11-07 01:33:04,046 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:33:04,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:33:04,145 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:33:04,146 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737741486] [2019-11-07 01:33:04,146 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080490380] [2019-11-07 01:33:04,146 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 01:33:04,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:33:04,211 INFO L256 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-07 01:33:04,218 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:33:04,280 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:33:04,281 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:33:04,314 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:33:04,315 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1186332302] [2019-11-07 01:33:04,341 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2019-11-07 01:33:04,341 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:33:04,348 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:33:04,355 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:33:04,356 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:33:04,569 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 30 for LOIs [2019-11-07 01:33:04,837 WARN L191 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2019-11-07 01:33:05,033 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 36 for LOIs [2019-11-07 01:33:05,045 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 16 for LOIs [2019-11-07 01:33:05,049 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:33:05,735 WARN L191 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 40 [2019-11-07 01:33:05,824 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 01:33:05,825 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 11] total 18 [2019-11-07 01:33:05,827 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594201137] [2019-11-07 01:33:05,828 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-11-07 01:33:05,829 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:33:05,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-11-07 01:33:05,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2019-11-07 01:33:05,833 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 18 states. [2019-11-07 01:33:06,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:33:06,485 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions. [2019-11-07 01:33:06,485 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-07 01:33:06,486 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 13 [2019-11-07 01:33:06,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:33:06,487 INFO L225 Difference]: With dead ends: 36 [2019-11-07 01:33:06,487 INFO L226 Difference]: Without dead ends: 27 [2019-11-07 01:33:06,489 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2019-11-07 01:33:06,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-11-07 01:33:06,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 18. [2019-11-07 01:33:06,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-11-07 01:33:06,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2019-11-07 01:33:06,497 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2019-11-07 01:33:06,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:33:06,497 INFO L462 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2019-11-07 01:33:06,498 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-11-07 01:33:06,498 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2019-11-07 01:33:06,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-07 01:33:06,498 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:33:06,499 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:33:06,702 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:33:06,702 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:33:06,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:33:06,703 INFO L82 PathProgramCache]: Analyzing trace with hash 1448869271, now seen corresponding path program 2 times [2019-11-07 01:33:06,703 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:33:06,703 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418577122] [2019-11-07 01:33:06,704 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:33:06,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:33:06,974 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:33:06,974 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418577122] [2019-11-07 01:33:06,975 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750346132] [2019-11-07 01:33:06,975 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 01:33:07,021 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-11-07 01:33:07,021 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-07 01:33:07,022 INFO L256 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 23 conjunts are in the unsatisfiable core [2019-11-07 01:33:07,024 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:33:11,927 WARN L191 SmtUtils]: Spent 4.71 s on a formula simplification that was a NOOP. DAG size: 42 [2019-11-07 01:33:12,037 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:33:12,038 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:33:12,234 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:33:12,235 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1616900455] [2019-11-07 01:33:12,236 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2019-11-07 01:33:12,236 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:33:12,237 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:33:12,237 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:33:12,237 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:33:12,262 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 30 for LOIs [2019-11-07 01:33:12,373 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 36 for LOIs [2019-11-07 01:33:12,380 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 16 for LOIs [2019-11-07 01:33:12,382 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:33:13,161 WARN L191 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 40 [2019-11-07 01:33:13,283 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 01:33:13,283 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 11] total 32 [2019-11-07 01:33:13,284 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378829680] [2019-11-07 01:33:13,284 INFO L442 AbstractCegarLoop]: Interpolant automaton has 32 states [2019-11-07 01:33:13,285 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:33:13,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2019-11-07 01:33:13,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=880, Unknown=0, NotChecked=0, Total=992 [2019-11-07 01:33:13,287 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 32 states. [2019-11-07 01:33:14,975 WARN L191 SmtUtils]: Spent 1.34 s on a formula simplification. DAG size of input: 68 DAG size of output: 62 [2019-11-07 01:33:17,536 WARN L191 SmtUtils]: Spent 1.96 s on a formula simplification. DAG size of input: 71 DAG size of output: 62 [2019-11-07 01:33:18,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:33:18,095 INFO L93 Difference]: Finished difference Result 33 states and 36 transitions. [2019-11-07 01:33:18,096 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-11-07 01:33:18,096 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 14 [2019-11-07 01:33:18,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:33:18,099 INFO L225 Difference]: With dead ends: 33 [2019-11-07 01:33:18,099 INFO L226 Difference]: Without dead ends: 31 [2019-11-07 01:33:18,100 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 10.0s TimeCoverageRelationStatistics Valid=227, Invalid=1579, Unknown=0, NotChecked=0, Total=1806 [2019-11-07 01:33:18,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-11-07 01:33:18,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 24. [2019-11-07 01:33:18,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-11-07 01:33:18,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2019-11-07 01:33:18,114 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 14 [2019-11-07 01:33:18,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:33:18,114 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2019-11-07 01:33:18,114 INFO L463 AbstractCegarLoop]: Interpolant automaton has 32 states. [2019-11-07 01:33:18,114 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2019-11-07 01:33:18,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-11-07 01:33:18,115 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:33:18,115 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:33:18,318 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:33:18,319 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:33:18,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:33:18,319 INFO L82 PathProgramCache]: Analyzing trace with hash -1296602369, now seen corresponding path program 1 times [2019-11-07 01:33:18,320 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:33:18,320 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305797695] [2019-11-07 01:33:18,320 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:33:18,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:33:18,577 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:33:18,578 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305797695] [2019-11-07 01:33:18,578 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1476547878] [2019-11-07 01:33:18,578 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:33:18,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:33:18,625 INFO L256 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 23 conjunts are in the unsatisfiable core [2019-11-07 01:33:18,628 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:33:18,895 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:33:18,896 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:33:19,214 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:33:19,215 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2107478887] [2019-11-07 01:33:19,216 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2019-11-07 01:33:19,216 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:33:19,217 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:33:19,217 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:33:19,217 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:33:19,247 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 30 for LOIs [2019-11-07 01:33:19,881 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 73 for LOIs [2019-11-07 01:33:19,892 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 16 for LOIs [2019-11-07 01:33:19,893 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:33:22,760 WARN L191 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 44 [2019-11-07 01:33:23,327 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 01:33:23,327 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13, 10, 12] total 39 [2019-11-07 01:33:23,328 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158531453] [2019-11-07 01:33:23,329 INFO L442 AbstractCegarLoop]: Interpolant automaton has 39 states [2019-11-07 01:33:23,329 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:33:23,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2019-11-07 01:33:23,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=1356, Unknown=1, NotChecked=0, Total=1482 [2019-11-07 01:33:23,332 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 39 states. [2019-11-07 01:33:34,478 WARN L191 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 46 [2019-11-07 01:33:37,508 WARN L191 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 49 [2019-11-07 01:33:37,681 WARN L191 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 45 [2019-11-07 01:33:40,099 WARN L191 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 42 [2019-11-07 01:33:40,393 WARN L191 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 43 [2019-11-07 01:33:41,196 WARN L191 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 49 [2019-11-07 01:33:41,525 WARN L191 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 42 [2019-11-07 01:33:41,762 WARN L191 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2019-11-07 01:33:41,916 WARN L191 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 46 [2019-11-07 01:33:43,005 WARN L191 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 56 [2019-11-07 01:33:43,215 WARN L191 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 48 [2019-11-07 01:33:46,037 WARN L191 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 49 [2019-11-07 01:33:46,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:33:46,039 INFO L93 Difference]: Finished difference Result 62 states and 70 transitions. [2019-11-07 01:33:46,040 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2019-11-07 01:33:46,040 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 21 [2019-11-07 01:33:46,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:33:46,044 INFO L225 Difference]: With dead ends: 62 [2019-11-07 01:33:46,044 INFO L226 Difference]: Without dead ends: 60 [2019-11-07 01:33:46,048 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1549 ImplicationChecksByTransitivity, 13.4s TimeCoverageRelationStatistics Valid=592, Invalid=5105, Unknown=3, NotChecked=0, Total=5700 [2019-11-07 01:33:46,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-11-07 01:33:46,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 46. [2019-11-07 01:33:46,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2019-11-07 01:33:46,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 52 transitions. [2019-11-07 01:33:46,066 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 52 transitions. Word has length 21 [2019-11-07 01:33:46,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:33:46,067 INFO L462 AbstractCegarLoop]: Abstraction has 46 states and 52 transitions. [2019-11-07 01:33:46,067 INFO L463 AbstractCegarLoop]: Interpolant automaton has 39 states. [2019-11-07 01:33:46,067 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 52 transitions. [2019-11-07 01:33:46,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-11-07 01:33:46,069 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:33:46,069 INFO L410 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:33:46,272 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:33:46,273 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:33:46,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:33:46,274 INFO L82 PathProgramCache]: Analyzing trace with hash -1478277397, now seen corresponding path program 2 times [2019-11-07 01:33:46,274 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:33:46,275 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838185453] [2019-11-07 01:33:46,275 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:33:46,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:33:46,416 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:33:46,416 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838185453] [2019-11-07 01:33:46,417 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013947662] [2019-11-07 01:33:46,417 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 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 01:33:46,483 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-07 01:33:46,483 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-07 01:33:46,485 INFO L256 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 32 conjunts are in the unsatisfiable core [2019-11-07 01:33:46,488 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:33:48,814 WARN L191 SmtUtils]: Spent 2.11 s on a formula simplification that was a NOOP. DAG size: 42