/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.trace.refinement.strategy SIFA_TAIPAN --sifa.abstract.domain CompoundDomain --rcfgbuilder.size.of.a.code.block LoopFreeBlock --sifa.call.summarizer TopInputCallSummarizer --sifa.fluid SizeLimitFluid --sifa.simplification.technique SIMPLIFY_QUICK -i ../../../trunk/examples/svcomp/array-examples/standard_two_index_06.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-07 01:27:20,717 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2019-11-07 01:27:20,812 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-07 01:27:20,831 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-07 01:27:20,831 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-07 01:27:20,833 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-07 01:27:20,833 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-07 01:27:20,833 INFO L138 SettingsManager]: * Use SBE=true [2019-11-07 01:27:20,834 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-07 01:27:20,834 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-07 01:27:20,834 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-07 01:27:20,834 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-07 01:27:20,834 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-07 01:27:20,835 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-07 01:27:20,836 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-07 01:27:20,836 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-07 01:27:20,836 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-07 01:27:20,837 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-07 01:27:20,837 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-07 01:27:20,837 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-07 01:27:20,837 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-07 01:27:20,837 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-07 01:27:20,837 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-07 01:27:20,838 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-07 01:27:20,838 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 01:27:20,838 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-07 01:27:20,838 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-07 01:27:20,838 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-07 01:27:20,839 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-07 01:27:20,839 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-07 01:27:20,839 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-07 01:27:20,839 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> SIFA_TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> CompoundDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> LoopFreeBlock Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Call Summarizer -> TopInputCallSummarizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Fluid -> SizeLimitFluid Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Simplification Technique -> SIMPLIFY_QUICK [2019-11-07 01:27:21,121 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-07 01:27:21,134 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-07 01:27:21,138 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-07 01:27:21,140 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-07 01:27:21,140 INFO L275 PluginConnector]: CDTParser initialized [2019-11-07 01:27:21,141 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_two_index_06.i [2019-11-07 01:27:21,219 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6f416172f/022c0bf73bcd44b98ca6363b010c6c68/FLAG64157e79c [2019-11-07 01:27:21,624 INFO L306 CDTParser]: Found 1 translation units. [2019-11-07 01:27:21,626 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_two_index_06.i [2019-11-07 01:27:21,632 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6f416172f/022c0bf73bcd44b98ca6363b010c6c68/FLAG64157e79c [2019-11-07 01:27:22,014 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6f416172f/022c0bf73bcd44b98ca6363b010c6c68 [2019-11-07 01:27:22,024 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-07 01:27:22,025 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-07 01:27:22,028 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-07 01:27:22,029 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-07 01:27:22,033 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-07 01:27:22,034 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:27:22" (1/1) ... [2019-11-07 01:27:22,037 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3f3f1635 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:27:22, skipping insertion in model container [2019-11-07 01:27:22,037 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:27:22" (1/1) ... [2019-11-07 01:27:22,048 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-07 01:27:22,068 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-07 01:27:22,243 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 01:27:22,248 INFO L188 MainTranslator]: Completed pre-run [2019-11-07 01:27:22,271 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 01:27:22,292 INFO L192 MainTranslator]: Completed translation [2019-11-07 01:27:22,293 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:27:22 WrapperNode [2019-11-07 01:27:22,293 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-07 01:27:22,294 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-07 01:27:22,294 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-07 01:27:22,294 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-07 01:27:22,411 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:27:22" (1/1) ... [2019-11-07 01:27:22,411 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:27:22" (1/1) ... [2019-11-07 01:27:22,421 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:27:22" (1/1) ... [2019-11-07 01:27:22,422 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:27:22" (1/1) ... [2019-11-07 01:27:22,437 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:27:22" (1/1) ... [2019-11-07 01:27:22,445 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:27:22" (1/1) ... [2019-11-07 01:27:22,447 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:27:22" (1/1) ... [2019-11-07 01:27:22,448 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-07 01:27:22,449 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-07 01:27:22,449 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-07 01:27:22,449 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-07 01:27:22,453 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:27:22" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 01:27:22,523 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-07 01:27:22,523 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-07 01:27:22,524 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-11-07 01:27:22,524 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-07 01:27:22,524 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-07 01:27:22,524 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-11-07 01:27:22,524 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-07 01:27:22,524 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-07 01:27:22,525 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-07 01:27:22,525 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-07 01:27:22,525 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-07 01:27:22,525 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-07 01:27:22,525 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-07 01:27:22,525 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-07 01:27:22,841 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-07 01:27:22,841 INFO L284 CfgBuilder]: Removed 3 assume(true) statements. [2019-11-07 01:27:22,842 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:27:22 BoogieIcfgContainer [2019-11-07 01:27:22,843 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-07 01:27:22,844 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-07 01:27:22,844 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-07 01:27:22,847 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-07 01:27:22,847 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:27:22" (1/3) ... [2019-11-07 01:27:22,848 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25032724 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:27:22, skipping insertion in model container [2019-11-07 01:27:22,848 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:27:22" (2/3) ... [2019-11-07 01:27:22,849 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25032724 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:27:22, skipping insertion in model container [2019-11-07 01:27:22,849 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:27:22" (3/3) ... [2019-11-07 01:27:22,851 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_two_index_06.i [2019-11-07 01:27:22,860 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-07 01:27:22,868 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-07 01:27:22,879 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-07 01:27:22,904 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-07 01:27:22,904 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-07 01:27:22,904 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-07 01:27:22,904 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-07 01:27:22,904 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-07 01:27:22,905 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-07 01:27:22,905 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-07 01:27:22,905 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-07 01:27:22,920 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2019-11-07 01:27:22,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-11-07 01:27:22,925 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:27:22,925 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:27:22,928 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:27:22,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:27:22,932 INFO L82 PathProgramCache]: Analyzing trace with hash 328370140, now seen corresponding path program 1 times [2019-11-07 01:27:22,943 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:27:22,943 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993113552] [2019-11-07 01:27:22,943 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:27:23,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:27:23,114 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:27:23,114 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993113552] [2019-11-07 01:27:23,115 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 01:27:23,116 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-07 01:27:23,116 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050141549] [2019-11-07 01:27:23,121 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 01:27:23,122 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:27:23,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 01:27:23,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 01:27:23,139 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 3 states. [2019-11-07 01:27:23,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:27:23,220 INFO L93 Difference]: Finished difference Result 33 states and 40 transitions. [2019-11-07 01:27:23,222 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 01:27:23,224 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2019-11-07 01:27:23,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:27:23,235 INFO L225 Difference]: With dead ends: 33 [2019-11-07 01:27:23,236 INFO L226 Difference]: Without dead ends: 17 [2019-11-07 01:27:23,242 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 01:27:23,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2019-11-07 01:27:23,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2019-11-07 01:27:23,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-11-07 01:27:23,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2019-11-07 01:27:23,295 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 12 [2019-11-07 01:27:23,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:27:23,296 INFO L462 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2019-11-07 01:27:23,296 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 01:27:23,297 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2019-11-07 01:27:23,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-11-07 01:27:23,298 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:27:23,299 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:27:23,299 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:27:23,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:27:23,300 INFO L82 PathProgramCache]: Analyzing trace with hash 1896737256, now seen corresponding path program 1 times [2019-11-07 01:27:23,300 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:27:23,301 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69339015] [2019-11-07 01:27:23,301 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:27:23,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:27:23,376 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-07 01:27:23,377 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69339015] [2019-11-07 01:27:23,377 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 01:27:23,378 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-07 01:27:23,378 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636283050] [2019-11-07 01:27:23,379 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 01:27:23,380 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:27:23,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 01:27:23,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 01:27:23,381 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand 3 states. [2019-11-07 01:27:23,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:27:23,422 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2019-11-07 01:27:23,423 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 01:27:23,423 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2019-11-07 01:27:23,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:27:23,426 INFO L225 Difference]: With dead ends: 30 [2019-11-07 01:27:23,426 INFO L226 Difference]: Without dead ends: 21 [2019-11-07 01:27:23,427 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 01:27:23,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-11-07 01:27:23,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 18. [2019-11-07 01:27:23,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-11-07 01:27:23,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2019-11-07 01:27:23,436 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 13 [2019-11-07 01:27:23,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:27:23,437 INFO L462 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2019-11-07 01:27:23,437 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 01:27:23,437 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2019-11-07 01:27:23,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-07 01:27:23,438 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:27:23,438 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:27:23,439 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:27:23,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:27:23,439 INFO L82 PathProgramCache]: Analyzing trace with hash -1718311367, now seen corresponding path program 1 times [2019-11-07 01:27:23,439 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:27:23,440 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017924615] [2019-11-07 01:27:23,440 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:27:23,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:27:23,530 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-07 01:27:23,531 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017924615] [2019-11-07 01:27:23,531 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204655688] [2019-11-07 01:27:23,532 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:27:23,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:27:23,610 INFO L256 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 01:27:23,616 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:27:23,663 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-07 01:27:23,664 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:27:23,712 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-07 01:27:23,713 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1619715751] [2019-11-07 01:27:23,747 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2019-11-07 01:27:23,747 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:27:23,754 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:27:23,762 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:27:23,763 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:27:23,883 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 01:27:24,273 WARN L191 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 44 [2019-11-07 01:27:24,388 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 32 for LOIs [2019-11-07 01:27:24,398 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 01:27:24,401 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:27:24,650 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 01:27:24,651 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 11] total 18 [2019-11-07 01:27:24,652 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365404616] [2019-11-07 01:27:24,653 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-11-07 01:27:24,653 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:27:24,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-11-07 01:27:24,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2019-11-07 01:27:24,654 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand 18 states. [2019-11-07 01:27:25,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:27:25,409 INFO L93 Difference]: Finished difference Result 50 states and 61 transitions. [2019-11-07 01:27:25,409 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-11-07 01:27:25,409 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-11-07 01:27:25,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:27:25,412 INFO L225 Difference]: With dead ends: 50 [2019-11-07 01:27:25,412 INFO L226 Difference]: Without dead ends: 39 [2019-11-07 01:27:25,414 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=234, Invalid=888, Unknown=0, NotChecked=0, Total=1122 [2019-11-07 01:27:25,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-11-07 01:27:25,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 24. [2019-11-07 01:27:25,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-11-07 01:27:25,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2019-11-07 01:27:25,429 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 14 [2019-11-07 01:27:25,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:27:25,429 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2019-11-07 01:27:25,430 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-11-07 01:27:25,430 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2019-11-07 01:27:25,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-11-07 01:27:25,431 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:27:25,431 INFO L410 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:27:25,644 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:27:25,645 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:27:25,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:27:25,645 INFO L82 PathProgramCache]: Analyzing trace with hash -1363999975, now seen corresponding path program 2 times [2019-11-07 01:27:25,646 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:27:25,646 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473259955] [2019-11-07 01:27:25,646 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:27:25,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:27:25,770 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-07 01:27:25,770 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473259955] [2019-11-07 01:27:25,771 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [379955805] [2019-11-07 01:27:25,771 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:27:25,830 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-07 01:27:25,831 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-07 01:27:25,832 INFO L256 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-07 01:27:25,834 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:27:25,845 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-07 01:27:25,846 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:27:25,893 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-07 01:27:25,893 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [894333328] [2019-11-07 01:27:25,895 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2019-11-07 01:27:25,895 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:27:25,896 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:27:25,896 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:27:25,896 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:27:25,925 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 01:27:26,132 WARN L191 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 44 [2019-11-07 01:27:26,209 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 32 for LOIs [2019-11-07 01:27:26,216 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 01:27:26,218 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:27:26,540 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 01:27:26,540 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 11] total 21 [2019-11-07 01:27:26,540 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986137163] [2019-11-07 01:27:26,541 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-11-07 01:27:26,541 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:27:26,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-11-07 01:27:26,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=317, Unknown=0, NotChecked=0, Total=420 [2019-11-07 01:27:26,542 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 21 states. [2019-11-07 01:27:27,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:27:27,626 INFO L93 Difference]: Finished difference Result 73 states and 90 transitions. [2019-11-07 01:27:27,628 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-11-07 01:27:27,628 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 20 [2019-11-07 01:27:27,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:27:27,629 INFO L225 Difference]: With dead ends: 73 [2019-11-07 01:27:27,630 INFO L226 Difference]: Without dead ends: 60 [2019-11-07 01:27:27,631 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 512 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=436, Invalid=1456, Unknown=0, NotChecked=0, Total=1892 [2019-11-07 01:27:27,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-11-07 01:27:27,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 32. [2019-11-07 01:27:27,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-11-07 01:27:27,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2019-11-07 01:27:27,643 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 20 [2019-11-07 01:27:27,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:27:27,643 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2019-11-07 01:27:27,643 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-11-07 01:27:27,643 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2019-11-07 01:27:27,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-11-07 01:27:27,644 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:27:27,644 INFO L410 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:27:27,848 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:27:27,848 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:27:27,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:27:27,848 INFO L82 PathProgramCache]: Analyzing trace with hash 311824988, now seen corresponding path program 3 times [2019-11-07 01:27:27,849 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:27:27,849 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26817156] [2019-11-07 01:27:27,849 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:27:27,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:27:28,052 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-11-07 01:27:28,053 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26817156] [2019-11-07 01:27:28,053 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274213069] [2019-11-07 01:27:28,053 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:27:28,117 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-07 01:27:28,118 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-07 01:27:28,119 INFO L256 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-07 01:27:28,122 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:27:28,175 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-11-07 01:27:28,175 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:27:28,294 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-11-07 01:27:28,295 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1431701507] [2019-11-07 01:27:28,296 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2019-11-07 01:27:28,297 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:27:28,297 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:27:28,297 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:27:28,298 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:27:28,329 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 01:27:28,624 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 32 for LOIs [2019-11-07 01:27:28,631 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 01:27:28,633 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:27:28,915 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 01:27:28,915 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11, 11] total 38 [2019-11-07 01:27:28,916 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115206137] [2019-11-07 01:27:28,916 INFO L442 AbstractCegarLoop]: Interpolant automaton has 38 states [2019-11-07 01:27:28,917 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:27:28,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2019-11-07 01:27:28,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=457, Invalid=949, Unknown=0, NotChecked=0, Total=1406 [2019-11-07 01:27:28,918 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand 38 states. [2019-11-07 01:27:30,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:27:30,789 INFO L93 Difference]: Finished difference Result 109 states and 142 transitions. [2019-11-07 01:27:30,790 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2019-11-07 01:27:30,790 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 28 [2019-11-07 01:27:30,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:27:30,793 INFO L225 Difference]: With dead ends: 109 [2019-11-07 01:27:30,793 INFO L226 Difference]: Without dead ends: 91 [2019-11-07 01:27:30,797 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2127 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1752, Invalid=4890, Unknown=0, NotChecked=0, Total=6642 [2019-11-07 01:27:30,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2019-11-07 01:27:30,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 52. [2019-11-07 01:27:30,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2019-11-07 01:27:30,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 54 transitions. [2019-11-07 01:27:30,812 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 54 transitions. Word has length 28 [2019-11-07 01:27:30,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:27:30,812 INFO L462 AbstractCegarLoop]: Abstraction has 52 states and 54 transitions. [2019-11-07 01:27:30,812 INFO L463 AbstractCegarLoop]: Interpolant automaton has 38 states. [2019-11-07 01:27:30,812 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 54 transitions. [2019-11-07 01:27:30,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-11-07 01:27:30,814 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:27:30,814 INFO L410 BasicCegarLoop]: trace histogram [25, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:27:31,017 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:27:31,018 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:27:31,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:27:31,018 INFO L82 PathProgramCache]: Analyzing trace with hash 102164889, now seen corresponding path program 4 times [2019-11-07 01:27:31,019 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:27:31,019 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191327225] [2019-11-07 01:27:31,019 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:27:31,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:27:31,310 INFO L134 CoverageAnalysis]: Checked inductivity of 391 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2019-11-07 01:27:31,310 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191327225] [2019-11-07 01:27:31,310 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [816328548] [2019-11-07 01:27:31,311 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:27:31,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:27:31,418 INFO L256 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 27 conjunts are in the unsatisfiable core [2019-11-07 01:27:31,422 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:27:31,635 INFO L134 CoverageAnalysis]: Checked inductivity of 391 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2019-11-07 01:27:31,636 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:27:32,351 INFO L134 CoverageAnalysis]: Checked inductivity of 391 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2019-11-07 01:27:32,351 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [790721526] [2019-11-07 01:27:32,354 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2019-11-07 01:27:32,357 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:27:32,358 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:27:32,358 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:27:32,359 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:27:32,390 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 01:27:32,651 WARN L191 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 44 [2019-11-07 01:27:32,756 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 32 for LOIs [2019-11-07 01:27:32,765 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 01:27:32,767 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:27:33,033 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 01:27:33,033 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 28, 28, 11] total 72 [2019-11-07 01:27:33,034 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865258788] [2019-11-07 01:27:33,034 INFO L442 AbstractCegarLoop]: Interpolant automaton has 72 states [2019-11-07 01:27:33,035 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:27:33,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2019-11-07 01:27:33,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2038, Invalid=3074, Unknown=0, NotChecked=0, Total=5112 [2019-11-07 01:27:33,039 INFO L87 Difference]: Start difference. First operand 52 states and 54 transitions. Second operand 72 states. [2019-11-07 01:27:37,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:27:37,716 INFO L93 Difference]: Finished difference Result 170 states and 229 transitions. [2019-11-07 01:27:37,717 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2019-11-07 01:27:37,717 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 48 [2019-11-07 01:27:37,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:27:37,721 INFO L225 Difference]: With dead ends: 170 [2019-11-07 01:27:37,722 INFO L226 Difference]: Without dead ends: 149 [2019-11-07 01:27:37,732 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8639 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=7286, Invalid=16894, Unknown=0, NotChecked=0, Total=24180 [2019-11-07 01:27:37,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2019-11-07 01:27:37,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 92. [2019-11-07 01:27:37,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2019-11-07 01:27:37,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 94 transitions. [2019-11-07 01:27:37,780 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 94 transitions. Word has length 48 [2019-11-07 01:27:37,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:27:37,780 INFO L462 AbstractCegarLoop]: Abstraction has 92 states and 94 transitions. [2019-11-07 01:27:37,780 INFO L463 AbstractCegarLoop]: Interpolant automaton has 72 states. [2019-11-07 01:27:37,781 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 94 transitions. [2019-11-07 01:27:37,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2019-11-07 01:27:37,786 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:27:37,786 INFO L410 BasicCegarLoop]: trace histogram [59, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:27:37,991 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:27:37,991 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:27:37,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:27:37,992 INFO L82 PathProgramCache]: Analyzing trace with hash -227893063, now seen corresponding path program 5 times [2019-11-07 01:27:37,992 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:27:37,992 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123520716] [2019-11-07 01:27:37,993 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:27:38,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:27:38,417 INFO L134 CoverageAnalysis]: Checked inductivity of 1923 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 1770 trivial. 0 not checked. [2019-11-07 01:27:38,418 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123520716] [2019-11-07 01:27:38,418 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [595999046] [2019-11-07 01:27:38,418 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