java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.trace.refinement.strategy SIFA_TAIPAN --sifa.abstract.domain CompoundDomain --rcfgbuilder.size.of.a.code.block LoopFreeBlock --sifa.call.summarizer TopInputCallSummarizer --sifa.fluid SizeLimitFluid --sifa.simplification.technique SIMPLIFY_QUICK -i ../../../trunk/examples/svcomp/array-examples/standard_copy3_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 01:32:31,882 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 01:32:31,885 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 01:32:31,904 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-10-15 01:32:31,929 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 01:32:31,931 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 01:32:31,933 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 01:32:31,935 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 01:32:31,936 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 01:32:31,937 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 01:32:31,939 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 01:32:31,943 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 01:32:31,948 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 01:32:31,950 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 01:32:31,953 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 01:32:31,955 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 01:32:31,957 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 01:32:31,966 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 01:32:31,968 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 01:32:31,969 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 01:32:31,970 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 01:32:31,993 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 01:32:31,994 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 01:32:31,995 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 01:32:31,996 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 01:32:31,996 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 01:32:31,997 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 01:32:31,997 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 01:32:31,997 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 01:32:31,997 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 01:32:31,997 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 01:32:31,997 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 01:32:31,998 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 01:32:31,998 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 01:32:31,998 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 01:32:32,000 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 01:32:32,000 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 01:32:32,000 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 01:32:32,000 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 01:32:32,000 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 01:32:32,001 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 01:32:32,001 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 01:32:32,001 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:32:32,001 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 01:32:32,001 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 01:32:32,002 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 01:32:32,002 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 01:32:32,002 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 01:32:32,002 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 01:32:32,002 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 01:32:32,270 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 01:32:32,283 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 01:32:32,287 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 01:32:32,288 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 01:32:32,289 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 01:32:32,290 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_copy3_ground-1.i [2019-10-15 01:32:32,361 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7a38280f4/0c2e742f72464b879b12dede82547d6a/FLAGd7e41c955 [2019-10-15 01:32:32,822 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 01:32:32,823 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_copy3_ground-1.i [2019-10-15 01:32:32,829 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7a38280f4/0c2e742f72464b879b12dede82547d6a/FLAGd7e41c955 [2019-10-15 01:32:33,204 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7a38280f4/0c2e742f72464b879b12dede82547d6a [2019-10-15 01:32:33,215 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 01:32:33,217 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 01:32:33,218 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 01:32:33,218 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 01:32:33,222 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 01:32:33,223 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:32:33" (1/1) ... [2019-10-15 01:32:33,226 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5611840f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:32:33, skipping insertion in model container [2019-10-15 01:32:33,227 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:32:33" (1/1) ... [2019-10-15 01:32:33,235 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 01:32:33,255 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 01:32:33,426 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:32:33,430 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 01:32:33,454 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:32:33,472 INFO L192 MainTranslator]: Completed translation [2019-10-15 01:32:33,473 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:32:33 WrapperNode [2019-10-15 01:32:33,473 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 01:32:33,473 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 01:32:33,474 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 01:32:33,474 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 01:32:33,570 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:32:33" (1/1) ... [2019-10-15 01:32:33,571 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:32:33" (1/1) ... [2019-10-15 01:32:33,578 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:32:33" (1/1) ... [2019-10-15 01:32:33,578 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:32:33" (1/1) ... [2019-10-15 01:32:33,586 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:32:33" (1/1) ... [2019-10-15 01:32:33,599 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:32:33" (1/1) ... [2019-10-15 01:32:33,601 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:32:33" (1/1) ... [2019-10-15 01:32:33,603 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 01:32:33,604 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 01:32:33,604 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 01:32:33,604 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 01:32:33,605 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:32:33" (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 01:32:33,669 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 01:32:33,669 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 01:32:33,670 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-15 01:32:33,670 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 01:32:33,670 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 01:32:33,670 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-15 01:32:33,670 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 01:32:33,670 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 01:32:33,671 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-15 01:32:33,671 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-15 01:32:33,671 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-15 01:32:33,671 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-15 01:32:33,671 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 01:32:33,672 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 01:32:34,130 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 01:32:34,131 INFO L284 CfgBuilder]: Removed 5 assume(true) statements. [2019-10-15 01:32:34,132 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:32:34 BoogieIcfgContainer [2019-10-15 01:32:34,132 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 01:32:34,133 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 01:32:34,134 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 01:32:34,137 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 01:32:34,137 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 01:32:33" (1/3) ... [2019-10-15 01:32:34,138 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f788cf5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:32:34, skipping insertion in model container [2019-10-15 01:32:34,138 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:32:33" (2/3) ... [2019-10-15 01:32:34,139 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f788cf5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:32:34, skipping insertion in model container [2019-10-15 01:32:34,139 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:32:34" (3/3) ... [2019-10-15 01:32:34,141 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_copy3_ground-1.i [2019-10-15 01:32:34,156 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 01:32:34,163 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 01:32:34,173 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 01:32:34,196 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 01:32:34,196 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 01:32:34,196 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 01:32:34,196 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 01:32:34,196 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 01:32:34,196 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 01:32:34,197 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 01:32:34,197 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 01:32:34,212 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2019-10-15 01:32:34,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-10-15 01:32:34,218 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:32:34,219 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:32:34,221 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:32:34,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:32:34,226 INFO L82 PathProgramCache]: Analyzing trace with hash 1206026117, now seen corresponding path program 1 times [2019-10-15 01:32:34,233 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:32:34,234 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594572426] [2019-10-15 01:32:34,234 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:32:34,234 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:32:34,234 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:32:34,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:32:34,410 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 01:32:34,411 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594572426] [2019-10-15 01:32:34,412 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:32:34,412 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 01:32:34,412 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252308800] [2019-10-15 01:32:34,416 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:32:34,416 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:32:34,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:32:34,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:32:34,429 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 3 states. [2019-10-15 01:32:34,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:32:34,472 INFO L93 Difference]: Finished difference Result 37 states and 48 transitions. [2019-10-15 01:32:34,473 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:32:34,474 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 14 [2019-10-15 01:32:34,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:32:34,485 INFO L225 Difference]: With dead ends: 37 [2019-10-15 01:32:34,486 INFO L226 Difference]: Without dead ends: 19 [2019-10-15 01:32:34,492 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 01:32:34,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2019-10-15 01:32:34,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2019-10-15 01:32:34,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-10-15 01:32:34,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2019-10-15 01:32:34,554 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 14 [2019-10-15 01:32:34,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:32:34,555 INFO L462 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2019-10-15 01:32:34,555 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:32:34,555 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2019-10-15 01:32:34,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-10-15 01:32:34,557 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:32:34,558 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:32:34,559 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:32:34,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:32:34,560 INFO L82 PathProgramCache]: Analyzing trace with hash 89083319, now seen corresponding path program 1 times [2019-10-15 01:32:34,561 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:32:34,561 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444844702] [2019-10-15 01:32:34,561 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:32:34,562 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:32:34,562 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:32:34,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:32:34,655 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 01:32:34,656 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444844702] [2019-10-15 01:32:34,656 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:32:34,657 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 01:32:34,657 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831133222] [2019-10-15 01:32:34,660 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:32:34,661 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:32:34,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:32:34,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:32:34,663 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand 3 states. [2019-10-15 01:32:34,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:32:34,713 INFO L93 Difference]: Finished difference Result 33 states and 42 transitions. [2019-10-15 01:32:34,714 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:32:34,714 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2019-10-15 01:32:34,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:32:34,715 INFO L225 Difference]: With dead ends: 33 [2019-10-15 01:32:34,716 INFO L226 Difference]: Without dead ends: 22 [2019-10-15 01:32:34,717 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 01:32:34,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-10-15 01:32:34,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2019-10-15 01:32:34,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-10-15 01:32:34,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2019-10-15 01:32:34,724 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 15 [2019-10-15 01:32:34,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:32:34,724 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2019-10-15 01:32:34,725 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:32:34,725 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2019-10-15 01:32:34,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-10-15 01:32:34,726 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:32:34,726 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:32:34,726 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:32:34,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:32:34,727 INFO L82 PathProgramCache]: Analyzing trace with hash -1551222113, now seen corresponding path program 1 times [2019-10-15 01:32:34,727 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:32:34,728 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599844716] [2019-10-15 01:32:34,728 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:32:34,728 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:32:34,728 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:32:34,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:32:34,848 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-15 01:32:34,852 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599844716] [2019-10-15 01:32:34,853 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2009450091] [2019-10-15 01:32:34,853 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 01:32:34,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:32:34,925 INFO L256 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:32:34,935 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:32:34,984 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-15 01:32:34,985 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:32:35,025 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-15 01:32:35,025 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2014223330] [2019-10-15 01:32:35,053 INFO L162 IcfgInterpreter]: Started Sifa with 15 locations of interest [2019-10-15 01:32:35,053 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:32:35,060 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:32:35,069 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:32:35,070 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:32:35,278 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:32:36,363 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 29 for LOIs [2019-10-15 01:32:36,376 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:32:36,383 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:32:36,696 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:32:36,697 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 11] total 18 [2019-10-15 01:32:36,697 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696119153] [2019-10-15 01:32:36,699 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-10-15 01:32:36,699 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:32:36,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-10-15 01:32:36,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2019-10-15 01:32:36,700 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand 18 states. [2019-10-15 01:32:37,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:32:37,381 INFO L93 Difference]: Finished difference Result 52 states and 65 transitions. [2019-10-15 01:32:37,382 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-10-15 01:32:37,382 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 18 [2019-10-15 01:32:37,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:32:37,383 INFO L225 Difference]: With dead ends: 52 [2019-10-15 01:32:37,383 INFO L226 Difference]: Without dead ends: 37 [2019-10-15 01:32:37,385 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=145, Invalid=785, Unknown=0, NotChecked=0, Total=930 [2019-10-15 01:32:37,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-10-15 01:32:37,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 28. [2019-10-15 01:32:37,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-10-15 01:32:37,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2019-10-15 01:32:37,393 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 18 [2019-10-15 01:32:37,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:32:37,394 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2019-10-15 01:32:37,394 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-10-15 01:32:37,394 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2019-10-15 01:32:37,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-10-15 01:32:37,395 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:32:37,395 INFO L380 BasicCegarLoop]: trace histogram [4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:32:37,600 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:32:37,601 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:32:37,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:32:37,602 INFO L82 PathProgramCache]: Analyzing trace with hash -697307259, now seen corresponding path program 2 times [2019-10-15 01:32:37,603 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:32:37,603 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523848386] [2019-10-15 01:32:37,603 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:32:37,604 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:32:37,604 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:32:37,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:32:37,706 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-10-15 01:32:37,706 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523848386] [2019-10-15 01:32:37,707 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076589675] [2019-10-15 01:32:37,707 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 01:32:37,771 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-10-15 01:32:37,771 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:32:37,772 INFO L256 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-15 01:32:37,774 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:32:37,813 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-15 01:32:37,813 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:32:37,844 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-15 01:32:37,845 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [268137854] [2019-10-15 01:32:37,846 INFO L162 IcfgInterpreter]: Started Sifa with 15 locations of interest [2019-10-15 01:32:37,846 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:32:37,847 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:32:37,847 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:32:37,848 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:32:37,884 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:32:38,328 WARN L191 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 38 [2019-10-15 01:32:38,619 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 29 for LOIs [2019-10-15 01:32:38,632 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:32:38,638 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:32:38,946 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:32:38,946 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5, 11] total 23 [2019-10-15 01:32:38,947 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681890040] [2019-10-15 01:32:38,948 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-10-15 01:32:38,948 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:32:38,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-10-15 01:32:38,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2019-10-15 01:32:38,949 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 23 states. [2019-10-15 01:32:39,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:32:39,843 INFO L93 Difference]: Finished difference Result 68 states and 88 transitions. [2019-10-15 01:32:39,843 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-10-15 01:32:39,844 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 24 [2019-10-15 01:32:39,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:32:39,845 INFO L225 Difference]: With dead ends: 68 [2019-10-15 01:32:39,845 INFO L226 Difference]: Without dead ends: 50 [2019-10-15 01:32:39,846 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 373 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=237, Invalid=1403, Unknown=0, NotChecked=0, Total=1640 [2019-10-15 01:32:39,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-10-15 01:32:39,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 41. [2019-10-15 01:32:39,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-10-15 01:32:39,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2019-10-15 01:32:39,855 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 24 [2019-10-15 01:32:39,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:32:39,856 INFO L462 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2019-10-15 01:32:39,856 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-10-15 01:32:39,856 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2019-10-15 01:32:39,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-10-15 01:32:39,857 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:32:39,857 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:32:40,061 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:32:40,062 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:32:40,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:32:40,062 INFO L82 PathProgramCache]: Analyzing trace with hash 1288000311, now seen corresponding path program 3 times [2019-10-15 01:32:40,063 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:32:40,063 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544682543] [2019-10-15 01:32:40,064 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:32:40,065 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:32:40,065 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:32:40,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:32:40,206 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2019-10-15 01:32:40,206 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544682543] [2019-10-15 01:32:40,206 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [480381506] [2019-10-15 01:32:40,207 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 01:32:40,288 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-15 01:32:40,289 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:32:40,293 INFO L256 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-15 01:32:40,298 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:32:40,307 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2019-10-15 01:32:40,307 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:32:40,386 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2019-10-15 01:32:40,386 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [863663771] [2019-10-15 01:32:40,388 INFO L162 IcfgInterpreter]: Started Sifa with 15 locations of interest [2019-10-15 01:32:40,388 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:32:40,389 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:32:40,390 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:32:40,390 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:32:40,418 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:32:41,068 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 29 for LOIs [2019-10-15 01:32:41,077 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:32:41,080 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:32:41,358 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:32:41,359 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 11] total 25 [2019-10-15 01:32:41,359 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252610030] [2019-10-15 01:32:41,360 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-10-15 01:32:41,361 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:32:41,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-10-15 01:32:41,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=466, Unknown=0, NotChecked=0, Total=600 [2019-10-15 01:32:41,362 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand 25 states. [2019-10-15 01:32:42,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:32:42,192 INFO L93 Difference]: Finished difference Result 87 states and 101 transitions. [2019-10-15 01:32:42,201 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-10-15 01:32:42,201 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 37 [2019-10-15 01:32:42,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:32:42,203 INFO L225 Difference]: With dead ends: 87 [2019-10-15 01:32:42,203 INFO L226 Difference]: Without dead ends: 57 [2019-10-15 01:32:42,204 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 504 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=369, Invalid=1523, Unknown=0, NotChecked=0, Total=1892 [2019-10-15 01:32:42,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2019-10-15 01:32:42,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 48. [2019-10-15 01:32:42,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2019-10-15 01:32:42,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 52 transitions. [2019-10-15 01:32:42,214 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 52 transitions. Word has length 37 [2019-10-15 01:32:42,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:32:42,214 INFO L462 AbstractCegarLoop]: Abstraction has 48 states and 52 transitions. [2019-10-15 01:32:42,214 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-10-15 01:32:42,214 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 52 transitions. [2019-10-15 01:32:42,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-10-15 01:32:42,216 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:32:42,216 INFO L380 BasicCegarLoop]: trace histogram [12, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:32:42,419 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:32:42,420 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:32:42,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:32:42,421 INFO L82 PathProgramCache]: Analyzing trace with hash 498732933, now seen corresponding path program 4 times [2019-10-15 01:32:42,422 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:32:42,422 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665732373] [2019-10-15 01:32:42,422 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:32:42,422 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:32:42,423 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:32:42,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:32:42,593 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2019-10-15 01:32:42,593 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665732373] [2019-10-15 01:32:42,594 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080133248] [2019-10-15 01:32:42,594 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 01:32:42,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:32:42,691 INFO L256 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 14 conjunts are in the unsatisfiable core [2019-10-15 01:32:42,702 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:32:42,713 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2019-10-15 01:32:42,713 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:32:42,976 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2019-10-15 01:32:42,976 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [572007285] [2019-10-15 01:32:42,978 INFO L162 IcfgInterpreter]: Started Sifa with 15 locations of interest [2019-10-15 01:32:42,978 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:32:42,979 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:32:42,979 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:32:42,979 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:32:42,996 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:32:43,597 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 29 for LOIs [2019-10-15 01:32:43,605 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:32:43,608 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:32:43,931 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:32:43,931 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15, 11] total 39 [2019-10-15 01:32:43,931 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692453562] [2019-10-15 01:32:43,933 INFO L442 AbstractCegarLoop]: Interpolant automaton has 39 states [2019-10-15 01:32:43,933 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:32:43,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2019-10-15 01:32:43,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=1047, Unknown=0, NotChecked=0, Total=1482 [2019-10-15 01:32:43,934 INFO L87 Difference]: Start difference. First operand 48 states and 52 transitions. Second operand 39 states. [2019-10-15 01:32:45,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:32:45,289 INFO L93 Difference]: Finished difference Result 101 states and 122 transitions. [2019-10-15 01:32:45,290 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2019-10-15 01:32:45,290 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 44 [2019-10-15 01:32:45,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:32:45,291 INFO L225 Difference]: With dead ends: 101 [2019-10-15 01:32:45,291 INFO L226 Difference]: Without dead ends: 71 [2019-10-15 01:32:45,293 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1274 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1244, Invalid=3868, Unknown=0, NotChecked=0, Total=5112 [2019-10-15 01:32:45,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2019-10-15 01:32:45,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 62. [2019-10-15 01:32:45,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2019-10-15 01:32:45,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 66 transitions. [2019-10-15 01:32:45,303 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 66 transitions. Word has length 44 [2019-10-15 01:32:45,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:32:45,304 INFO L462 AbstractCegarLoop]: Abstraction has 62 states and 66 transitions. [2019-10-15 01:32:45,304 INFO L463 AbstractCegarLoop]: Interpolant automaton has 39 states. [2019-10-15 01:32:45,304 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 66 transitions. [2019-10-15 01:32:45,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2019-10-15 01:32:45,305 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:32:45,305 INFO L380 BasicCegarLoop]: trace histogram [26, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:32:45,518 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:32:45,519 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:32:45,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:32:45,520 INFO L82 PathProgramCache]: Analyzing trace with hash -1364485307, now seen corresponding path program 5 times [2019-10-15 01:32:45,520 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:32:45,520 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199170485] [2019-10-15 01:32:45,521 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:32:45,521 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:32:45,521 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:32:45,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:32:45,907 INFO L134 CoverageAnalysis]: Checked inductivity of 414 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2019-10-15 01:32:45,908 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199170485] [2019-10-15 01:32:45,908 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [801646747] [2019-10-15 01:32:45,908 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 01:32:46,269 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-10-15 01:32:46,270 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:32:46,272 INFO L256 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-15 01:32:46,274 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:32:46,431 INFO L134 CoverageAnalysis]: Checked inductivity of 414 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 393 trivial. 0 not checked. [2019-10-15 01:32:46,431 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:32:46,596 INFO L134 CoverageAnalysis]: Checked inductivity of 414 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 393 trivial. 0 not checked. [2019-10-15 01:32:46,597 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1422272590] [2019-10-15 01:32:46,599 INFO L162 IcfgInterpreter]: Started Sifa with 15 locations of interest [2019-10-15 01:32:46,599 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:32:46,599 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:32:46,600 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:32:46,600 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:32:46,622 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:32:47,230 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 29 for LOIs [2019-10-15 01:32:47,236 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:32:47,239 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:32:47,735 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:32:47,735 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 9, 9, 11] total 53 [2019-10-15 01:32:47,735 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859057594] [2019-10-15 01:32:47,737 INFO L442 AbstractCegarLoop]: Interpolant automaton has 53 states [2019-10-15 01:32:47,737 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:32:47,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2019-10-15 01:32:47,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=554, Invalid=2202, Unknown=0, NotChecked=0, Total=2756 [2019-10-15 01:32:47,739 INFO L87 Difference]: Start difference. First operand 62 states and 66 transitions. Second operand 53 states. [2019-10-15 01:32:50,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:32:50,506 INFO L93 Difference]: Finished difference Result 126 states and 158 transitions. [2019-10-15 01:32:50,507 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2019-10-15 01:32:50,507 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 58 [2019-10-15 01:32:50,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:32:50,509 INFO L225 Difference]: With dead ends: 126 [2019-10-15 01:32:50,509 INFO L226 Difference]: Without dead ends: 96 [2019-10-15 01:32:50,512 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2334 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1684, Invalid=8416, Unknown=0, NotChecked=0, Total=10100 [2019-10-15 01:32:50,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2019-10-15 01:32:50,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 87. [2019-10-15 01:32:50,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2019-10-15 01:32:50,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 91 transitions. [2019-10-15 01:32:50,525 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 91 transitions. Word has length 58 [2019-10-15 01:32:50,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:32:50,525 INFO L462 AbstractCegarLoop]: Abstraction has 87 states and 91 transitions. [2019-10-15 01:32:50,525 INFO L463 AbstractCegarLoop]: Interpolant automaton has 53 states. [2019-10-15 01:32:50,526 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 91 transitions. [2019-10-15 01:32:50,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2019-10-15 01:32:50,527 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:32:50,527 INFO L380 BasicCegarLoop]: trace histogram [27, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:32:50,729 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:32:50,730 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:32:50,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:32:50,731 INFO L82 PathProgramCache]: Analyzing trace with hash -738951561, now seen corresponding path program 6 times [2019-10-15 01:32:50,731 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:32:50,732 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046446462] [2019-10-15 01:32:50,732 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:32:50,732 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:32:50,732 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:32:50,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:32:50,988 INFO L134 CoverageAnalysis]: Checked inductivity of 693 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 588 trivial. 0 not checked. [2019-10-15 01:32:50,989 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046446462] [2019-10-15 01:32:50,989 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1503323408] [2019-10-15 01:32:50,989 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:32:51,130 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-15 01:32:51,130 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:32:51,132 INFO L256 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 29 conjunts are in the unsatisfiable core [2019-10-15 01:32:51,155 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:32:51,667 INFO L134 CoverageAnalysis]: Checked inductivity of 693 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 315 trivial. 0 not checked. [2019-10-15 01:32:51,667 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:32:52,790 INFO L134 CoverageAnalysis]: Checked inductivity of 693 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 315 trivial. 0 not checked. [2019-10-15 01:32:52,790 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1389984222] [2019-10-15 01:32:52,792 INFO L162 IcfgInterpreter]: Started Sifa with 15 locations of interest [2019-10-15 01:32:52,792 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:32:52,792 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:32:52,793 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:32:52,793 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:32:52,817 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:32:53,484 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 29 for LOIs [2019-10-15 01:32:53,490 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:32:53,493 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:32:53,994 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:32:53,994 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 30, 30, 11] total 83 [2019-10-15 01:32:53,994 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298475240] [2019-10-15 01:32:53,995 INFO L442 AbstractCegarLoop]: Interpolant automaton has 83 states [2019-10-15 01:32:53,996 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:32:53,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2019-10-15 01:32:53,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1817, Invalid=4989, Unknown=0, NotChecked=0, Total=6806 [2019-10-15 01:32:53,998 INFO L87 Difference]: Start difference. First operand 87 states and 91 transitions. Second operand 83 states. [2019-10-15 01:32:58,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:32:58,735 INFO L93 Difference]: Finished difference Result 182 states and 221 transitions. [2019-10-15 01:32:58,735 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2019-10-15 01:32:58,736 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 83 [2019-10-15 01:32:58,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:32:58,738 INFO L225 Difference]: With dead ends: 182 [2019-10-15 01:32:58,738 INFO L226 Difference]: Without dead ends: 128 [2019-10-15 01:32:58,744 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 360 GetRequests, 201 SyntacticMatches, 0 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5984 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=5475, Invalid=20285, Unknown=0, NotChecked=0, Total=25760 [2019-10-15 01:32:58,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2019-10-15 01:32:58,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 119. [2019-10-15 01:32:58,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2019-10-15 01:32:58,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 123 transitions. [2019-10-15 01:32:58,760 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 123 transitions. Word has length 83 [2019-10-15 01:32:58,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:32:58,761 INFO L462 AbstractCegarLoop]: Abstraction has 119 states and 123 transitions. [2019-10-15 01:32:58,761 INFO L463 AbstractCegarLoop]: Interpolant automaton has 83 states. [2019-10-15 01:32:58,761 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 123 transitions. [2019-10-15 01:32:58,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2019-10-15 01:32:58,763 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:32:58,764 INFO L380 BasicCegarLoop]: trace histogram [56, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:32:58,968 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:32:58,968 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:32:58,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:32:58,968 INFO L82 PathProgramCache]: Analyzing trace with hash 1199056401, now seen corresponding path program 7 times [2019-10-15 01:32:58,969 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:32:58,969 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399484082] [2019-10-15 01:32:58,969 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:32:58,969 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:32:58,969 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:32:59,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:32:59,333 INFO L134 CoverageAnalysis]: Checked inductivity of 1956 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 1836 trivial. 0 not checked. [2019-10-15 01:32:59,334 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399484082] [2019-10-15 01:32:59,334 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [348280430] [2019-10-15 01:32:59,334 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:32:59,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:32:59,567 INFO L256 TraceCheckSpWp]: Trace formula consists of 596 conjuncts, 58 conjunts are in the unsatisfiable core [2019-10-15 01:32:59,575 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:33:01,422 INFO L134 CoverageAnalysis]: Checked inductivity of 1956 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 360 trivial. 0 not checked. [2019-10-15 01:33:01,422 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:33:05,398 INFO L134 CoverageAnalysis]: Checked inductivity of 1956 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 360 trivial. 0 not checked. [2019-10-15 01:33:05,398 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1279246927] [2019-10-15 01:33:05,399 INFO L162 IcfgInterpreter]: Started Sifa with 15 locations of interest [2019-10-15 01:33:05,400 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:33:05,400 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:33:05,400 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:33:05,400 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:33:05,423 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:33:06,042 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 29 for LOIs [2019-10-15 01:33:06,050 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:33:06,052 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:33:06,671 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:33:06,671 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 59, 59, 11] total 142 [2019-10-15 01:33:06,672 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982516473] [2019-10-15 01:33:06,673 INFO L442 AbstractCegarLoop]: Interpolant automaton has 142 states [2019-10-15 01:33:06,674 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:33:06,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 142 interpolants. [2019-10-15 01:33:06,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6851, Invalid=13171, Unknown=0, NotChecked=0, Total=20022 [2019-10-15 01:33:06,679 INFO L87 Difference]: Start difference. First operand 119 states and 123 transitions. Second operand 142 states.