/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 --abstractinterpretationv2.abstract.domain IntervalDomain --traceabstraction.trace.refinement.strategy TAIPAN --traceabstraction.abstract.interpretation.mode USE_PREDICATES -i ../../../trunk/examples/svcomp/eca-rers2012/Problem11_label12.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 22:45:27,262 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 22:45:27,265 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 22:45:27,282 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-06 22:45:27,306 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 22:45:27,307 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 22:45:27,309 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 22:45:27,311 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 22:45:27,313 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 22:45:27,314 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 22:45:27,316 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 22:45:27,320 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 22:45:27,323 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 22:45:27,326 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 22:45:27,328 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 22:45:27,329 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 22:45:27,331 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 22:45:27,341 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 22:45:27,342 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 22:45:27,343 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 22:45:27,343 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 [2019-11-06 22:45:27,376 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 22:45:27,376 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 22:45:27,380 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 22:45:27,380 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 22:45:27,380 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 22:45:27,380 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 22:45:27,381 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 22:45:27,381 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 22:45:27,381 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 22:45:27,381 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 22:45:27,381 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 22:45:27,382 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 22:45:27,382 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 22:45:27,382 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 22:45:27,382 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 22:45:27,382 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 22:45:27,383 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 22:45:27,383 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 22:45:27,383 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 22:45:27,383 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 22:45:27,383 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 22:45:27,383 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 22:45:27,384 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 22:45:27,384 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 22:45:27,384 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 22:45:27,384 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 22:45:27,385 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 22:45:27,385 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 22:45:27,385 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2: Abstract domain -> IntervalDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Abstract interpretation Mode -> USE_PREDICATES [2019-11-06 22:45:27,651 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 22:45:27,666 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 22:45:27,670 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 22:45:27,671 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 22:45:27,671 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 22:45:27,672 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem11_label12.c [2019-11-06 22:45:27,745 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4aadf0c81/e0800bac8dca4eecb0e83c1f26db408c/FLAGd3a3b5d28 [2019-11-06 22:45:28,370 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 22:45:28,371 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem11_label12.c [2019-11-06 22:45:28,390 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4aadf0c81/e0800bac8dca4eecb0e83c1f26db408c/FLAGd3a3b5d28 [2019-11-06 22:45:28,572 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4aadf0c81/e0800bac8dca4eecb0e83c1f26db408c [2019-11-06 22:45:28,580 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 22:45:28,582 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 22:45:28,583 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 22:45:28,584 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 22:45:28,587 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 22:45:28,588 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:45:28" (1/1) ... [2019-11-06 22:45:28,591 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@26511545 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:45:28, skipping insertion in model container [2019-11-06 22:45:28,591 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:45:28" (1/1) ... [2019-11-06 22:45:28,599 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 22:45:28,677 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 22:45:29,347 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:45:29,363 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 22:45:29,687 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:45:29,714 INFO L192 MainTranslator]: Completed translation [2019-11-06 22:45:29,715 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:45:29 WrapperNode [2019-11-06 22:45:29,715 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 22:45:29,716 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 22:45:29,716 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 22:45:29,716 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 22:45:29,735 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:45:29" (1/1) ... [2019-11-06 22:45:29,735 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:45:29" (1/1) ... [2019-11-06 22:45:29,786 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:45:29" (1/1) ... [2019-11-06 22:45:29,787 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:45:29" (1/1) ... [2019-11-06 22:45:29,870 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:45:29" (1/1) ... [2019-11-06 22:45:29,896 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:45:29" (1/1) ... [2019-11-06 22:45:29,910 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:45:29" (1/1) ... [2019-11-06 22:45:29,921 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 22:45:29,922 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 22:45:29,922 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 22:45:29,922 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 22:45:29,923 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:45:29" (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 [2019-11-06 22:45:29,998 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 22:45:29,998 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 22:45:29,999 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 22:45:29,999 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 22:45:29,999 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 22:45:29,999 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 22:45:29,999 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 22:45:30,000 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 22:45:30,000 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 22:45:30,000 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 22:45:30,000 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 22:45:31,664 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 22:45:31,665 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 22:45:31,666 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:45:31 BoogieIcfgContainer [2019-11-06 22:45:31,666 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 22:45:31,668 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 22:45:31,668 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 22:45:31,671 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 22:45:31,671 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:45:28" (1/3) ... [2019-11-06 22:45:31,672 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58fae68d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:45:31, skipping insertion in model container [2019-11-06 22:45:31,672 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:45:29" (2/3) ... [2019-11-06 22:45:31,673 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58fae68d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:45:31, skipping insertion in model container [2019-11-06 22:45:31,673 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:45:31" (3/3) ... [2019-11-06 22:45:31,675 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem11_label12.c [2019-11-06 22:45:31,685 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 22:45:31,693 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 22:45:31,705 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 22:45:31,733 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 22:45:31,733 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 22:45:31,733 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 22:45:31,733 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 22:45:31,734 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 22:45:31,734 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 22:45:31,734 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 22:45:31,734 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 22:45:31,761 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states. [2019-11-06 22:45:31,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-11-06 22:45:31,769 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:45:31,770 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:45:31,772 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:45:31,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:45:31,778 INFO L82 PathProgramCache]: Analyzing trace with hash 1842297178, now seen corresponding path program 1 times [2019-11-06 22:45:31,789 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:45:31,789 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534530777] [2019-11-06 22:45:31,789 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:45:31,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:45:32,175 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:45:32,176 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534530777] [2019-11-06 22:45:32,177 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:45:32,177 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-06 22:45:32,179 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621529712] [2019-11-06 22:45:32,184 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 22:45:32,186 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:45:32,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 22:45:32,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 22:45:32,240 INFO L87 Difference]: Start difference. First operand 292 states. Second operand 3 states. [2019-11-06 22:45:33,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:45:33,639 INFO L93 Difference]: Finished difference Result 787 states and 1379 transitions. [2019-11-06 22:45:33,643 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 22:45:33,644 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 31 [2019-11-06 22:45:33,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:45:33,663 INFO L225 Difference]: With dead ends: 787 [2019-11-06 22:45:33,663 INFO L226 Difference]: Without dead ends: 433 [2019-11-06 22:45:33,672 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 22:45:33,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 433 states. [2019-11-06 22:45:33,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 433 to 426. [2019-11-06 22:45:33,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 426 states. [2019-11-06 22:45:33,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 426 states to 426 states and 678 transitions. [2019-11-06 22:45:33,760 INFO L78 Accepts]: Start accepts. Automaton has 426 states and 678 transitions. Word has length 31 [2019-11-06 22:45:33,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:45:33,761 INFO L462 AbstractCegarLoop]: Abstraction has 426 states and 678 transitions. [2019-11-06 22:45:33,762 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 22:45:33,762 INFO L276 IsEmpty]: Start isEmpty. Operand 426 states and 678 transitions. [2019-11-06 22:45:33,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2019-11-06 22:45:33,770 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:45:33,771 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:45:33,771 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:45:33,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:45:33,772 INFO L82 PathProgramCache]: Analyzing trace with hash 1072563117, now seen corresponding path program 1 times [2019-11-06 22:45:33,773 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:45:33,773 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036697012] [2019-11-06 22:45:33,773 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:45:33,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:45:33,986 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:45:33,987 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036697012] [2019-11-06 22:45:33,987 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:45:33,987 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-06 22:45:33,987 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987572083] [2019-11-06 22:45:33,989 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 22:45:33,989 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:45:33,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 22:45:33,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-06 22:45:33,990 INFO L87 Difference]: Start difference. First operand 426 states and 678 transitions. Second operand 5 states. [2019-11-06 22:45:35,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:45:35,607 INFO L93 Difference]: Finished difference Result 1259 states and 2034 transitions. [2019-11-06 22:45:35,607 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-06 22:45:35,608 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 106 [2019-11-06 22:45:35,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:45:35,614 INFO L225 Difference]: With dead ends: 1259 [2019-11-06 22:45:35,614 INFO L226 Difference]: Without dead ends: 839 [2019-11-06 22:45:35,617 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-11-06 22:45:35,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 839 states. [2019-11-06 22:45:35,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 839 to 627. [2019-11-06 22:45:35,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 627 states. [2019-11-06 22:45:35,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 627 states to 627 states and 934 transitions. [2019-11-06 22:45:35,660 INFO L78 Accepts]: Start accepts. Automaton has 627 states and 934 transitions. Word has length 106 [2019-11-06 22:45:35,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:45:35,661 INFO L462 AbstractCegarLoop]: Abstraction has 627 states and 934 transitions. [2019-11-06 22:45:35,661 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 22:45:35,661 INFO L276 IsEmpty]: Start isEmpty. Operand 627 states and 934 transitions. [2019-11-06 22:45:35,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2019-11-06 22:45:35,664 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:45:35,664 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:45:35,665 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:45:35,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:45:35,665 INFO L82 PathProgramCache]: Analyzing trace with hash -855314794, now seen corresponding path program 1 times [2019-11-06 22:45:35,665 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:45:35,666 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43669076] [2019-11-06 22:45:35,666 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:45:35,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:45:35,855 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:45:35,855 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43669076] [2019-11-06 22:45:35,856 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:45:35,856 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-06 22:45:35,858 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642256626] [2019-11-06 22:45:35,858 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 22:45:35,859 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:45:35,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 22:45:35,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-06 22:45:35,860 INFO L87 Difference]: Start difference. First operand 627 states and 934 transitions. Second operand 5 states. [2019-11-06 22:45:37,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:45:37,799 INFO L93 Difference]: Finished difference Result 1872 states and 2846 transitions. [2019-11-06 22:45:37,803 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-06 22:45:37,803 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 117 [2019-11-06 22:45:37,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:45:37,811 INFO L225 Difference]: With dead ends: 1872 [2019-11-06 22:45:37,811 INFO L226 Difference]: Without dead ends: 1251 [2019-11-06 22:45:37,813 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-11-06 22:45:37,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1251 states. [2019-11-06 22:45:37,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1251 to 1032. [2019-11-06 22:45:37,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1032 states. [2019-11-06 22:45:37,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1032 states to 1032 states and 1433 transitions. [2019-11-06 22:45:37,856 INFO L78 Accepts]: Start accepts. Automaton has 1032 states and 1433 transitions. Word has length 117 [2019-11-06 22:45:37,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:45:37,857 INFO L462 AbstractCegarLoop]: Abstraction has 1032 states and 1433 transitions. [2019-11-06 22:45:37,857 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 22:45:37,857 INFO L276 IsEmpty]: Start isEmpty. Operand 1032 states and 1433 transitions. [2019-11-06 22:45:37,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2019-11-06 22:45:37,862 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:45:37,862 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:45:37,862 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:45:37,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:45:37,863 INFO L82 PathProgramCache]: Analyzing trace with hash 1681837426, now seen corresponding path program 1 times [2019-11-06 22:45:37,863 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:45:37,863 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574060913] [2019-11-06 22:45:37,864 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:45:37,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:45:38,098 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 19 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:45:38,098 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574060913] [2019-11-06 22:45:38,099 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [585577079] [2019-11-06 22:45:38,099 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 [2019-11-06 22:45:38,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:45:38,190 INFO L256 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 22:45:38,201 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:45:38,269 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:45:38,270 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:45:38,382 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:45:38,383 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-06 22:45:38,383 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [8] total 9 [2019-11-06 22:45:38,383 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293149005] [2019-11-06 22:45:38,386 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 22:45:38,386 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:45:38,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 22:45:38,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2019-11-06 22:45:38,387 INFO L87 Difference]: Start difference. First operand 1032 states and 1433 transitions. Second operand 3 states. [2019-11-06 22:45:39,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:45:39,445 INFO L93 Difference]: Finished difference Result 2662 states and 3820 transitions. [2019-11-06 22:45:39,446 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 22:45:39,446 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 162 [2019-11-06 22:45:39,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:45:39,456 INFO L225 Difference]: With dead ends: 2662 [2019-11-06 22:45:39,456 INFO L226 Difference]: Without dead ends: 1636 [2019-11-06 22:45:39,459 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 324 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2019-11-06 22:45:39,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1636 states. [2019-11-06 22:45:39,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1636 to 1629. [2019-11-06 22:45:39,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1629 states. [2019-11-06 22:45:39,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1629 states to 1629 states and 2257 transitions. [2019-11-06 22:45:39,507 INFO L78 Accepts]: Start accepts. Automaton has 1629 states and 2257 transitions. Word has length 162 [2019-11-06 22:45:39,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:45:39,508 INFO L462 AbstractCegarLoop]: Abstraction has 1629 states and 2257 transitions. [2019-11-06 22:45:39,508 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 22:45:39,508 INFO L276 IsEmpty]: Start isEmpty. Operand 1629 states and 2257 transitions. [2019-11-06 22:45:39,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2019-11-06 22:45:39,547 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:45:39,548 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:45:39,755 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:45:39,756 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:45:39,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:45:39,756 INFO L82 PathProgramCache]: Analyzing trace with hash 1078800445, now seen corresponding path program 1 times [2019-11-06 22:45:39,757 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:45:39,757 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302854386] [2019-11-06 22:45:39,757 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:45:39,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:45:39,949 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 48 proven. 68 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-06 22:45:39,950 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302854386] [2019-11-06 22:45:39,950 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1706943113] [2019-11-06 22:45:39,951 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2019-11-06 22:45:40,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:45:40,051 INFO L256 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 22:45:40,057 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:45:40,134 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 95 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2019-11-06 22:45:40,134 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:45:40,248 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 48 proven. 68 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-06 22:45:40,248 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:45:40,249 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 11 [2019-11-06 22:45:40,249 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285152724] [2019-11-06 22:45:40,250 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 22:45:40,250 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:45:40,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 22:45:40,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2019-11-06 22:45:40,251 INFO L87 Difference]: Start difference. First operand 1629 states and 2257 transitions. Second operand 5 states. [2019-11-06 22:45:41,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:45:41,943 INFO L93 Difference]: Finished difference Result 4500 states and 6394 transitions. [2019-11-06 22:45:41,944 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:45:41,944 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 186 [2019-11-06 22:45:41,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:45:41,960 INFO L225 Difference]: With dead ends: 4500 [2019-11-06 22:45:41,960 INFO L226 Difference]: Without dead ends: 2877 [2019-11-06 22:45:41,965 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 381 GetRequests, 368 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2019-11-06 22:45:41,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2877 states. [2019-11-06 22:45:42,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2877 to 2825. [2019-11-06 22:45:42,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2825 states. [2019-11-06 22:45:42,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2825 states to 2825 states and 3849 transitions. [2019-11-06 22:45:42,047 INFO L78 Accepts]: Start accepts. Automaton has 2825 states and 3849 transitions. Word has length 186 [2019-11-06 22:45:42,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:45:42,048 INFO L462 AbstractCegarLoop]: Abstraction has 2825 states and 3849 transitions. [2019-11-06 22:45:42,048 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 22:45:42,048 INFO L276 IsEmpty]: Start isEmpty. Operand 2825 states and 3849 transitions. [2019-11-06 22:45:42,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2019-11-06 22:45:42,051 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:45:42,051 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:45:42,254 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:45:42,255 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:45:42,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:45:42,255 INFO L82 PathProgramCache]: Analyzing trace with hash 1420666926, now seen corresponding path program 1 times [2019-11-06 22:45:42,256 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:45:42,256 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815517952] [2019-11-06 22:45:42,256 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:45:42,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:45:42,438 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 119 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:45:42,439 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815517952] [2019-11-06 22:45:42,439 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1871025687] [2019-11-06 22:45:42,439 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:45:42,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:45:42,527 INFO L256 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-06 22:45:42,531 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:45:42,568 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 119 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:45:42,568 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:45:42,679 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 119 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:45:42,680 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [583402211] [2019-11-06 22:45:42,686 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 188 [2019-11-06 22:45:42,756 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-11-06 22:45:42,756 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2)