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/sanfoundry_27_ground.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 01:31:44,937 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2019-10-15 01:31:44,978 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 01:31:44,979 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 01:31:44,980 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 01:31:44,981 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 01:31:44,982 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 01:31:44,983 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 01:31:44,985 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 01:31:44,987 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 01:31:44,988 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 01:31:44,989 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 01:31:44,990 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 01:31:44,991 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 01:31:44,993 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 01:31:45,002 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 01:31:45,002 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 01:31:45,003 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 01:31:45,004 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 [2019-10-15 01:31:45,018 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 01:31:45,018 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 01:31:45,019 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 01:31:45,020 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 01:31:45,020 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 01:31:45,020 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 01:31:45,020 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 01:31:45,021 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 01:31:45,021 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 01:31:45,021 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 01:31:45,021 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 01:31:45,021 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 01:31:45,021 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 01:31:45,022 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 01:31:45,022 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 01:31:45,022 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 01:31:45,022 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 01:31:45,022 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 01:31:45,023 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 01:31:45,023 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 01:31:45,023 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 01:31:45,023 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:31:45,024 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 01:31:45,024 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 01:31:45,024 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 01:31:45,024 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 01:31:45,024 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 01:31:45,024 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 01:31:45,025 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 [2019-10-15 01:31:45,327 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 01:31:45,341 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 01:31:45,345 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 01:31:45,347 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 01:31:45,347 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 01:31:45,348 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/sanfoundry_27_ground.i [2019-10-15 01:31:45,414 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b4b62cd1d/0e79cd1cedd645bc923b2de7bccb2b25/FLAG6b1b41222 [2019-10-15 01:31:45,876 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 01:31:45,877 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/sanfoundry_27_ground.i [2019-10-15 01:31:45,884 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b4b62cd1d/0e79cd1cedd645bc923b2de7bccb2b25/FLAG6b1b41222 [2019-10-15 01:31:46,284 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b4b62cd1d/0e79cd1cedd645bc923b2de7bccb2b25 [2019-10-15 01:31:46,295 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 01:31:46,297 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 01:31:46,298 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 01:31:46,298 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 01:31:46,302 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 01:31:46,303 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:31:46" (1/1) ... [2019-10-15 01:31:46,306 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3304fef9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:31:46, skipping insertion in model container [2019-10-15 01:31:46,306 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:31:46" (1/1) ... [2019-10-15 01:31:46,314 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 01:31:46,332 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 01:31:46,591 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:31:46,603 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 01:31:46,631 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:31:46,660 INFO L192 MainTranslator]: Completed translation [2019-10-15 01:31:46,660 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:31:46 WrapperNode [2019-10-15 01:31:46,661 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 01:31:46,661 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 01:31:46,662 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 01:31:46,662 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 01:31:46,796 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:31:46" (1/1) ... [2019-10-15 01:31:46,797 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:31:46" (1/1) ... [2019-10-15 01:31:46,805 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:31:46" (1/1) ... [2019-10-15 01:31:46,806 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:31:46" (1/1) ... [2019-10-15 01:31:46,813 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:31:46" (1/1) ... [2019-10-15 01:31:46,819 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:31:46" (1/1) ... [2019-10-15 01:31:46,821 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:31:46" (1/1) ... [2019-10-15 01:31:46,823 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 01:31:46,823 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 01:31:46,824 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 01:31:46,824 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 01:31:46,825 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:31:46" (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 [2019-10-15 01:31:46,888 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 01:31:46,888 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 01:31:46,888 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-15 01:31:46,889 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 01:31:46,889 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 01:31:46,889 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-15 01:31:46,890 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 01:31:46,890 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 01:31:46,890 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-15 01:31:46,890 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-15 01:31:46,890 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-15 01:31:46,891 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-15 01:31:46,892 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 01:31:46,892 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 01:31:47,292 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 01:31:47,292 INFO L284 CfgBuilder]: Removed 3 assume(true) statements. [2019-10-15 01:31:47,293 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:31:47 BoogieIcfgContainer [2019-10-15 01:31:47,294 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 01:31:47,295 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 01:31:47,295 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 01:31:47,298 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 01:31:47,299 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 01:31:46" (1/3) ... [2019-10-15 01:31:47,299 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33e13c0b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:31:47, skipping insertion in model container [2019-10-15 01:31:47,300 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:31:46" (2/3) ... [2019-10-15 01:31:47,300 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33e13c0b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:31:47, skipping insertion in model container [2019-10-15 01:31:47,300 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:31:47" (3/3) ... [2019-10-15 01:31:47,302 INFO L109 eAbstractionObserver]: Analyzing ICFG sanfoundry_27_ground.i [2019-10-15 01:31:47,312 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 01:31:47,321 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 01:31:47,333 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 01:31:47,358 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 01:31:47,359 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 01:31:47,359 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 01:31:47,359 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 01:31:47,359 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 01:31:47,360 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 01:31:47,360 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 01:31:47,360 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 01:31:47,379 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2019-10-15 01:31:47,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-10-15 01:31:47,385 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:31:47,386 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:31:47,388 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:31:47,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:31:47,395 INFO L82 PathProgramCache]: Analyzing trace with hash -1947700096, now seen corresponding path program 1 times [2019-10-15 01:31:47,404 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:31:47,405 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316101021] [2019-10-15 01:31:47,405 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:31:47,406 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:31:47,406 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:31:47,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:31:47,575 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:31:47,576 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316101021] [2019-10-15 01:31:47,577 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:31:47,577 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 01:31:47,578 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286107487] [2019-10-15 01:31:47,582 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:31:47,582 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:31:47,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:31:47,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:31:47,596 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 3 states. [2019-10-15 01:31:47,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:31:47,647 INFO L93 Difference]: Finished difference Result 33 states and 40 transitions. [2019-10-15 01:31:47,648 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:31:47,649 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2019-10-15 01:31:47,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:31:47,656 INFO L225 Difference]: With dead ends: 33 [2019-10-15 01:31:47,656 INFO L226 Difference]: Without dead ends: 17 [2019-10-15 01:31:47,659 INFO L600 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 [2019-10-15 01:31:47,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2019-10-15 01:31:47,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2019-10-15 01:31:47,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-10-15 01:31:47,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2019-10-15 01:31:47,693 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 12 [2019-10-15 01:31:47,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:31:47,693 INFO L462 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2019-10-15 01:31:47,693 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:31:47,694 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2019-10-15 01:31:47,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-10-15 01:31:47,694 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:31:47,695 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:31:47,695 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:31:47,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:31:47,696 INFO L82 PathProgramCache]: Analyzing trace with hash 520805519, now seen corresponding path program 1 times [2019-10-15 01:31:47,696 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:31:47,696 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957042030] [2019-10-15 01:31:47,697 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:31:47,697 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:31:47,697 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:31:47,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:31:47,738 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-15 01:31:47,739 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957042030] [2019-10-15 01:31:47,739 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:31:47,739 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 01:31:47,740 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044920892] [2019-10-15 01:31:47,741 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:31:47,742 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:31:47,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:31:47,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:31:47,742 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand 3 states. [2019-10-15 01:31:47,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:31:47,764 INFO L93 Difference]: Finished difference Result 27 states and 30 transitions. [2019-10-15 01:31:47,767 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:31:47,767 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2019-10-15 01:31:47,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:31:47,768 INFO L225 Difference]: With dead ends: 27 [2019-10-15 01:31:47,769 INFO L226 Difference]: Without dead ends: 18 [2019-10-15 01:31:47,770 INFO L600 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 [2019-10-15 01:31:47,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2019-10-15 01:31:47,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2019-10-15 01:31:47,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-10-15 01:31:47,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2019-10-15 01:31:47,778 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 13 [2019-10-15 01:31:47,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:31:47,778 INFO L462 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2019-10-15 01:31:47,779 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:31:47,779 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2019-10-15 01:31:47,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-10-15 01:31:47,781 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:31:47,782 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:31:47,782 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:31:47,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:31:47,784 INFO L82 PathProgramCache]: Analyzing trace with hash -1773270914, now seen corresponding path program 1 times [2019-10-15 01:31:47,785 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:31:47,786 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852750717] [2019-10-15 01:31:47,786 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:31:47,787 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:31:47,787 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:31:47,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:31:47,867 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-15 01:31:47,867 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852750717] [2019-10-15 01:31:47,868 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [559729544] [2019-10-15 01:31:47,868 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 [2019-10-15 01:31:47,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:31:47,938 INFO L256 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:31:47,943 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:31:47,973 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-15 01:31:47,974 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:31:48,020 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-15 01:31:48,021 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1289032752] [2019-10-15 01:31:48,074 INFO L162 IcfgInterpreter]: Started Sifa with 13 locations of interest [2019-10-15 01:31:48,074 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:31:48,089 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:31:48,098 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:31:48,106 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:31:48,283 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:31:48,552 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 6 for LOIs [2019-10-15 01:31:48,599 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:31:48,613 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:31:48,944 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:31:48,944 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 11] total 17 [2019-10-15 01:31:48,944 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619071037] [2019-10-15 01:31:48,946 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-10-15 01:31:48,946 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:31:48,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-10-15 01:31:48,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2019-10-15 01:31:48,948 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand 17 states. [2019-10-15 01:31:49,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:31:49,487 INFO L93 Difference]: Finished difference Result 37 states and 46 transitions. [2019-10-15 01:31:49,488 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-10-15 01:31:49,489 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2019-10-15 01:31:49,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:31:49,492 INFO L225 Difference]: With dead ends: 37 [2019-10-15 01:31:49,492 INFO L226 Difference]: Without dead ends: 26 [2019-10-15 01:31:49,501 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=136, Invalid=620, Unknown=0, NotChecked=0, Total=756 [2019-10-15 01:31:49,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-10-15 01:31:49,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 23. [2019-10-15 01:31:49,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-10-15 01:31:49,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2019-10-15 01:31:49,524 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 14 [2019-10-15 01:31:49,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:31:49,526 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2019-10-15 01:31:49,526 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-10-15 01:31:49,526 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2019-10-15 01:31:49,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-10-15 01:31:49,527 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:31:49,528 INFO L380 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:31:49,741 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:31:49,742 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:31:49,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:31:49,743 INFO L82 PathProgramCache]: Analyzing trace with hash 503527757, now seen corresponding path program 2 times [2019-10-15 01:31:49,744 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:31:49,744 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137705344] [2019-10-15 01:31:49,745 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:31:49,745 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:31:49,745 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:31:49,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:31:49,862 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-15 01:31:49,863 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137705344] [2019-10-15 01:31:49,864 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [29645412] [2019-10-15 01:31:49,864 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 [2019-10-15 01:31:49,929 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-15 01:31:49,929 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:31:49,930 INFO L256 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-15 01:31:49,932 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:31:49,945 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-15 01:31:49,945 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:31:50,006 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-15 01:31:50,006 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1685730792] [2019-10-15 01:31:50,008 INFO L162 IcfgInterpreter]: Started Sifa with 13 locations of interest [2019-10-15 01:31:50,008 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:31:50,009 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:31:50,009 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:31:50,009 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:31:50,055 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:31:50,224 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 6 for LOIs [2019-10-15 01:31:50,254 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:31:50,259 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:31:50,535 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:31:50,535 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 11] total 23 [2019-10-15 01:31:50,536 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967192092] [2019-10-15 01:31:50,540 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-10-15 01:31:50,540 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:31:50,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-10-15 01:31:50,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=399, Unknown=0, NotChecked=0, Total=506 [2019-10-15 01:31:50,541 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 23 states. [2019-10-15 01:31:51,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:31:51,240 INFO L93 Difference]: Finished difference Result 51 states and 67 transitions. [2019-10-15 01:31:51,240 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-10-15 01:31:51,240 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 19 [2019-10-15 01:31:51,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:31:51,242 INFO L225 Difference]: With dead ends: 51 [2019-10-15 01:31:51,242 INFO L226 Difference]: Without dead ends: 38 [2019-10-15 01:31:51,244 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=301, Invalid=1259, Unknown=0, NotChecked=0, Total=1560 [2019-10-15 01:31:51,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-10-15 01:31:51,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 35. [2019-10-15 01:31:51,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-10-15 01:31:51,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2019-10-15 01:31:51,252 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 19 [2019-10-15 01:31:51,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:31:51,252 INFO L462 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2019-10-15 01:31:51,253 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-10-15 01:31:51,253 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2019-10-15 01:31:51,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-10-15 01:31:51,254 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:31:51,254 INFO L380 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:31:51,462 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:31:51,465 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:31:51,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:31:51,466 INFO L82 PathProgramCache]: Analyzing trace with hash 677366477, now seen corresponding path program 3 times [2019-10-15 01:31:51,466 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:31:51,467 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382506987] [2019-10-15 01:31:51,467 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:31:51,467 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:31:51,468 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:31:51,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:31:51,661 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2019-10-15 01:31:51,662 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382506987] [2019-10-15 01:31:51,662 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [335372287] [2019-10-15 01:31:51,662 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 [2019-10-15 01:31:51,740 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-15 01:31:51,740 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:31:51,743 INFO L256 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 12 conjunts are in the unsatisfiable core [2019-10-15 01:31:51,751 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:31:51,775 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2019-10-15 01:31:51,776 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:31:52,021 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2019-10-15 01:31:52,022 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1037496659] [2019-10-15 01:31:52,025 INFO L162 IcfgInterpreter]: Started Sifa with 13 locations of interest [2019-10-15 01:31:52,025 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:31:52,026 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:31:52,026 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:31:52,026 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:31:52,075 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:31:52,198 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 6 for LOIs [2019-10-15 01:31:52,226 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:31:52,231 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:31:52,536 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:31:52,537 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13, 11] total 35 [2019-10-15 01:31:52,537 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507817680] [2019-10-15 01:31:52,538 INFO L442 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-10-15 01:31:52,538 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:31:52,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-10-15 01:31:52,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=329, Invalid=861, Unknown=0, NotChecked=0, Total=1190 [2019-10-15 01:31:52,539 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand 35 states. [2019-10-15 01:31:54,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:31:54,353 INFO L93 Difference]: Finished difference Result 81 states and 109 transitions. [2019-10-15 01:31:54,354 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2019-10-15 01:31:54,354 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 31 [2019-10-15 01:31:54,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:31:54,355 INFO L225 Difference]: With dead ends: 81 [2019-10-15 01:31:54,355 INFO L226 Difference]: Without dead ends: 62 [2019-10-15 01:31:54,359 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2038 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1711, Invalid=5429, Unknown=0, NotChecked=0, Total=7140 [2019-10-15 01:31:54,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2019-10-15 01:31:54,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 59. [2019-10-15 01:31:54,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2019-10-15 01:31:54,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 61 transitions. [2019-10-15 01:31:54,371 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 61 transitions. Word has length 31 [2019-10-15 01:31:54,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:31:54,371 INFO L462 AbstractCegarLoop]: Abstraction has 59 states and 61 transitions. [2019-10-15 01:31:54,372 INFO L463 AbstractCegarLoop]: Interpolant automaton has 35 states. [2019-10-15 01:31:54,372 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 61 transitions. [2019-10-15 01:31:54,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2019-10-15 01:31:54,373 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:31:54,374 INFO L380 BasicCegarLoop]: trace histogram [22, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:31:54,585 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:31:54,585 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:31:54,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:31:54,586 INFO L82 PathProgramCache]: Analyzing trace with hash -170402355, now seen corresponding path program 4 times [2019-10-15 01:31:54,586 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:31:54,587 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403247139] [2019-10-15 01:31:54,587 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:31:54,588 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:31:54,588 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:31:54,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:31:54,935 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2019-10-15 01:31:54,935 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403247139] [2019-10-15 01:31:54,935 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056653403] [2019-10-15 01:31:54,935 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 [2019-10-15 01:31:55,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:31:55,027 INFO L256 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 24 conjunts are in the unsatisfiable core [2019-10-15 01:31:55,031 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:31:55,061 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2019-10-15 01:31:55,062 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:31:55,771 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2019-10-15 01:31:55,772 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1940325510] [2019-10-15 01:31:55,773 INFO L162 IcfgInterpreter]: Started Sifa with 13 locations of interest [2019-10-15 01:31:55,773 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:31:55,774 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:31:55,774 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:31:55,774 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:31:55,803 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:31:55,899 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 6 for LOIs [2019-10-15 01:31:55,922 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:31:55,927 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:31:56,346 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:31:56,346 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25, 11] total 59 [2019-10-15 01:31:56,347 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820869726] [2019-10-15 01:31:56,348 INFO L442 AbstractCegarLoop]: Interpolant automaton has 59 states [2019-10-15 01:31:56,348 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:31:56,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2019-10-15 01:31:56,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1205, Invalid=2217, Unknown=0, NotChecked=0, Total=3422 [2019-10-15 01:31:56,351 INFO L87 Difference]: Start difference. First operand 59 states and 61 transitions. Second operand 59 states. [2019-10-15 01:31:59,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:31:59,453 INFO L93 Difference]: Finished difference Result 141 states and 193 transitions. [2019-10-15 01:31:59,455 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2019-10-15 01:31:59,455 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 55 [2019-10-15 01:31:59,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:31:59,456 INFO L225 Difference]: With dead ends: 141 [2019-10-15 01:31:59,456 INFO L226 Difference]: Without dead ends: 110 [2019-10-15 01:31:59,460 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2754 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=3559, Invalid=8873, Unknown=0, NotChecked=0, Total=12432 [2019-10-15 01:31:59,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2019-10-15 01:31:59,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 107. [2019-10-15 01:31:59,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2019-10-15 01:31:59,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 109 transitions. [2019-10-15 01:31:59,475 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 109 transitions. Word has length 55 [2019-10-15 01:31:59,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:31:59,475 INFO L462 AbstractCegarLoop]: Abstraction has 107 states and 109 transitions. [2019-10-15 01:31:59,475 INFO L463 AbstractCegarLoop]: Interpolant automaton has 59 states. [2019-10-15 01:31:59,475 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 109 transitions. [2019-10-15 01:31:59,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2019-10-15 01:31:59,477 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:31:59,477 INFO L380 BasicCegarLoop]: trace histogram [46, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:31:59,678 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:31:59,678 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:31:59,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:31:59,679 INFO L82 PathProgramCache]: Analyzing trace with hash -1764506675, now seen corresponding path program 5 times [2019-10-15 01:31:59,679 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:31:59,680 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170596353] [2019-10-15 01:31:59,680 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:31:59,680 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:31:59,680 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:31:59,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:32:00,711 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 1035 trivial. 0 not checked. [2019-10-15 01:32:00,712 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170596353] [2019-10-15 01:32:00,712 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1557074161] [2019-10-15 01:32:00,712 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 [2019-10-15 01:32:18,213 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2019-10-15 01:32:18,213 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:32:18,220 INFO L256 TraceCheckSpWp]: Trace formula consists of 512 conjuncts, 47 conjunts are in the unsatisfiable core [2019-10-15 01:32:18,226 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:32:18,249 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 1081 trivial. 0 not checked. [2019-10-15 01:32:18,250 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:32:20,621 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 1081 trivial. 0 not checked. [2019-10-15 01:32:20,621 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2045920333] [2019-10-15 01:32:20,623 INFO L162 IcfgInterpreter]: Started Sifa with 13 locations of interest [2019-10-15 01:32:20,623 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:32:20,623 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:32:20,624 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:32:20,624 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:32:20,660 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:32:20,739 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 6 for LOIs [2019-10-15 01:32:20,751 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:32:20,754 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:32:21,469 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:32:21,469 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 48, 48, 11] total 105 [2019-10-15 01:32:21,470 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233634991] [2019-10-15 01:32:21,471 INFO L442 AbstractCegarLoop]: Interpolant automaton has 105 states [2019-10-15 01:32:21,471 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:32:21,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2019-10-15 01:32:21,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4494, Invalid=6426, Unknown=0, NotChecked=0, Total=10920 [2019-10-15 01:32:21,476 INFO L87 Difference]: Start difference. First operand 107 states and 109 transitions. Second operand 105 states. [2019-10-15 01:32:29,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:32:29,664 INFO L93 Difference]: Finished difference Result 259 states and 357 transitions. [2019-10-15 01:32:29,664 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2019-10-15 01:32:29,664 INFO L78 Accepts]: Start accepts. Automaton has 105 states. Word has length 103 [2019-10-15 01:32:29,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:32:29,668 INFO L225 Difference]: With dead ends: 259 [2019-10-15 01:32:29,668 INFO L226 Difference]: Without dead ends: 204 [2019-10-15 01:32:29,675 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 550 GetRequests, 347 SyntacticMatches, 0 SemanticMatches, 203 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7928 ImplicationChecksByTransitivity, 10.3s TimeCoverageRelationStatistics Valid=13568, Invalid=28252, Unknown=0, NotChecked=0, Total=41820 [2019-10-15 01:32:29,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2019-10-15 01:32:29,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 201. [2019-10-15 01:32:29,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 201 states. [2019-10-15 01:32:29,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 203 transitions. [2019-10-15 01:32:29,700 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 203 transitions. Word has length 103 [2019-10-15 01:32:29,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:32:29,700 INFO L462 AbstractCegarLoop]: Abstraction has 201 states and 203 transitions. [2019-10-15 01:32:29,700 INFO L463 AbstractCegarLoop]: Interpolant automaton has 105 states. [2019-10-15 01:32:29,700 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 203 transitions. [2019-10-15 01:32:29,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2019-10-15 01:32:29,704 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:32:29,704 INFO L380 BasicCegarLoop]: trace histogram [93, 92, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:32:29,905 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:32:29,905 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:32:29,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:32:29,906 INFO L82 PathProgramCache]: Analyzing trace with hash 91212943, now seen corresponding path program 6 times [2019-10-15 01:32:29,906 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:32:29,907 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038104298] [2019-10-15 01:32:29,907 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:32:29,907 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:32:29,908 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:32:30,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat