/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 -i ../../../trunk/examples/svcomp/eca-rers2012/Problem14_label00.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 19:12:04,071 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 19:12:04,074 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 19:12:04,092 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-06 19:12:04,116 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 19:12:04,118 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 19:12:04,120 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 19:12:04,122 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 19:12:04,124 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 19:12:04,125 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 19:12:04,126 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 19:12:04,131 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 19:12:04,134 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 19:12:04,135 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 19:12:04,136 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 19:12:04,136 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 19:12:04,139 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 19:12:04,148 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 19:12:04,162 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 19:12:04,163 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 19:12:04,164 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 19:12:04,164 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 19:12:04,164 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 19:12:04,164 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 19:12:04,165 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 19:12:04,165 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 19:12:04,165 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 19:12:04,165 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 19:12:04,165 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 19:12:04,166 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 19:12:04,166 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 19:12:04,166 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 19:12:04,166 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 19:12:04,166 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 19:12:04,166 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 19:12:04,167 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 19:12:04,167 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 19:12:04,167 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 19:12:04,167 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 19:12:04,167 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 19:12:04,168 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 19:12:04,168 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 19:12:04,168 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 19:12:04,168 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 19:12:04,169 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 19:12:04,169 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 19:12:04,169 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-06 19:12:04,480 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 19:12:04,492 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 19:12:04,496 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 19:12:04,497 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 19:12:04,498 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 19:12:04,499 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label00.c [2019-11-06 19:12:04,558 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f4563fca0/e27772104c8549ae9246143cc1bdfcd6/FLAG98788da3e [2019-11-06 19:12:05,082 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 19:12:05,083 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem14_label00.c [2019-11-06 19:12:05,101 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f4563fca0/e27772104c8549ae9246143cc1bdfcd6/FLAG98788da3e [2019-11-06 19:12:05,382 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f4563fca0/e27772104c8549ae9246143cc1bdfcd6 [2019-11-06 19:12:05,393 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 19:12:05,395 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 19:12:05,396 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 19:12:05,396 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 19:12:05,399 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 19:12:05,400 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:12:05" (1/1) ... [2019-11-06 19:12:05,403 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@43f3db85 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:12:05, skipping insertion in model container [2019-11-06 19:12:05,403 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:12:05" (1/1) ... [2019-11-06 19:12:05,411 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 19:12:05,460 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 19:12:06,026 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 19:12:06,031 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 19:12:06,292 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 19:12:06,315 INFO L192 MainTranslator]: Completed translation [2019-11-06 19:12:06,316 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:12:06 WrapperNode [2019-11-06 19:12:06,317 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 19:12:06,318 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 19:12:06,318 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 19:12:06,318 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 19:12:06,339 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:12:06" (1/1) ... [2019-11-06 19:12:06,339 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:12:06" (1/1) ... [2019-11-06 19:12:06,381 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:12:06" (1/1) ... [2019-11-06 19:12:06,381 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:12:06" (1/1) ... [2019-11-06 19:12:06,444 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:12:06" (1/1) ... [2019-11-06 19:12:06,467 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:12:06" (1/1) ... [2019-11-06 19:12:06,484 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:12:06" (1/1) ... [2019-11-06 19:12:06,498 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 19:12:06,499 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 19:12:06,499 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 19:12:06,499 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 19:12:06,503 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:12:06" (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 19:12:06,595 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 19:12:06,596 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 19:12:06,596 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 19:12:06,596 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 19:12:06,596 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 19:12:06,598 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 19:12:06,598 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 19:12:06,598 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 19:12:06,599 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 19:12:06,599 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 19:12:06,600 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 19:12:08,354 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 19:12:08,355 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 19:12:08,360 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:12:08 BoogieIcfgContainer [2019-11-06 19:12:08,360 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 19:12:08,361 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 19:12:08,361 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 19:12:08,366 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 19:12:08,367 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 07:12:05" (1/3) ... [2019-11-06 19:12:08,368 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65609ced and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:12:08, skipping insertion in model container [2019-11-06 19:12:08,368 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:12:06" (2/3) ... [2019-11-06 19:12:08,369 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65609ced and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:12:08, skipping insertion in model container [2019-11-06 19:12:08,369 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:12:08" (3/3) ... [2019-11-06 19:12:08,375 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem14_label00.c [2019-11-06 19:12:08,387 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 19:12:08,394 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 19:12:08,404 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 19:12:08,432 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 19:12:08,433 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 19:12:08,433 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 19:12:08,433 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 19:12:08,433 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 19:12:08,433 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 19:12:08,438 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 19:12:08,439 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 19:12:08,481 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states. [2019-11-06 19:12:08,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2019-11-06 19:12:08,489 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:12:08,490 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, 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 19:12:08,492 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:12:08,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:12:08,496 INFO L82 PathProgramCache]: Analyzing trace with hash -837227006, now seen corresponding path program 1 times [2019-11-06 19:12:08,504 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:12:08,504 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106534582] [2019-11-06 19:12:08,505 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:12:08,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:12:08,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:12:08,912 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 19:12:08,913 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106534582] [2019-11-06 19:12:08,914 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:12:08,914 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 19:12:08,917 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857627116] [2019-11-06 19:12:08,924 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:12:08,925 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:12:08,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:12:08,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-06 19:12:08,946 INFO L87 Difference]: Start difference. First operand 254 states. Second operand 5 states. [2019-11-06 19:12:11,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:12:11,260 INFO L93 Difference]: Finished difference Result 886 states and 1613 transitions. [2019-11-06 19:12:11,261 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 19:12:11,262 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 59 [2019-11-06 19:12:11,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:12:11,284 INFO L225 Difference]: With dead ends: 886 [2019-11-06 19:12:11,284 INFO L226 Difference]: Without dead ends: 564 [2019-11-06 19:12:11,294 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:12:11,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2019-11-06 19:12:11,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 558. [2019-11-06 19:12:11,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 558 states. [2019-11-06 19:12:11,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 558 states to 558 states and 906 transitions. [2019-11-06 19:12:11,422 INFO L78 Accepts]: Start accepts. Automaton has 558 states and 906 transitions. Word has length 59 [2019-11-06 19:12:11,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:12:11,422 INFO L462 AbstractCegarLoop]: Abstraction has 558 states and 906 transitions. [2019-11-06 19:12:11,422 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 19:12:11,423 INFO L276 IsEmpty]: Start isEmpty. Operand 558 states and 906 transitions. [2019-11-06 19:12:11,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2019-11-06 19:12:11,430 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:12:11,430 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, 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, 1, 1, 1, 1, 1] [2019-11-06 19:12:11,430 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:12:11,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:12:11,431 INFO L82 PathProgramCache]: Analyzing trace with hash -1547926855, now seen corresponding path program 1 times [2019-11-06 19:12:11,431 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:12:11,431 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706632771] [2019-11-06 19:12:11,432 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:12:11,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:12:11,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:12:11,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:12:11,796 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:12:11,797 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706632771] [2019-11-06 19:12:11,798 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:12:11,798 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-11-06 19:12:11,798 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603243011] [2019-11-06 19:12:11,803 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-06 19:12:11,804 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:12:11,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-06 19:12:11,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-11-06 19:12:11,805 INFO L87 Difference]: Start difference. First operand 558 states and 906 transitions. Second operand 9 states. [2019-11-06 19:12:14,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:12:14,312 INFO L93 Difference]: Finished difference Result 2246 states and 3775 transitions. [2019-11-06 19:12:14,315 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-06 19:12:14,316 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 128 [2019-11-06 19:12:14,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:12:14,330 INFO L225 Difference]: With dead ends: 2246 [2019-11-06 19:12:14,330 INFO L226 Difference]: Without dead ends: 1694 [2019-11-06 19:12:14,333 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2019-11-06 19:12:14,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1694 states. [2019-11-06 19:12:14,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1694 to 1128. [2019-11-06 19:12:14,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1128 states. [2019-11-06 19:12:14,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1128 states to 1128 states and 1732 transitions. [2019-11-06 19:12:14,409 INFO L78 Accepts]: Start accepts. Automaton has 1128 states and 1732 transitions. Word has length 128 [2019-11-06 19:12:14,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:12:14,409 INFO L462 AbstractCegarLoop]: Abstraction has 1128 states and 1732 transitions. [2019-11-06 19:12:14,409 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-06 19:12:14,410 INFO L276 IsEmpty]: Start isEmpty. Operand 1128 states and 1732 transitions. [2019-11-06 19:12:14,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2019-11-06 19:12:14,413 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:12:14,414 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, 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, 1, 1, 1, 1, 1, 1] [2019-11-06 19:12:14,414 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:12:14,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:12:14,414 INFO L82 PathProgramCache]: Analyzing trace with hash -186094754, now seen corresponding path program 1 times [2019-11-06 19:12:14,415 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:12:14,415 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085994561] [2019-11-06 19:12:14,415 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:12:14,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:12:14,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:12:14,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:12:14,657 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:12:14,658 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085994561] [2019-11-06 19:12:14,658 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:12:14,659 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-11-06 19:12:14,660 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522548821] [2019-11-06 19:12:14,661 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-06 19:12:14,662 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:12:14,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-06 19:12:14,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-11-06 19:12:14,663 INFO L87 Difference]: Start difference. First operand 1128 states and 1732 transitions. Second operand 8 states. [2019-11-06 19:12:16,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:12:16,554 INFO L93 Difference]: Finished difference Result 2856 states and 4565 transitions. [2019-11-06 19:12:16,555 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-06 19:12:16,555 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 129 [2019-11-06 19:12:16,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:12:16,570 INFO L225 Difference]: With dead ends: 2856 [2019-11-06 19:12:16,571 INFO L226 Difference]: Without dead ends: 1734 [2019-11-06 19:12:16,574 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2019-11-06 19:12:16,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1734 states. [2019-11-06 19:12:16,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1734 to 1706. [2019-11-06 19:12:16,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1706 states. [2019-11-06 19:12:16,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1706 states to 1706 states and 2406 transitions. [2019-11-06 19:12:16,687 INFO L78 Accepts]: Start accepts. Automaton has 1706 states and 2406 transitions. Word has length 129 [2019-11-06 19:12:16,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:12:16,690 INFO L462 AbstractCegarLoop]: Abstraction has 1706 states and 2406 transitions. [2019-11-06 19:12:16,690 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-06 19:12:16,690 INFO L276 IsEmpty]: Start isEmpty. Operand 1706 states and 2406 transitions. [2019-11-06 19:12:16,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2019-11-06 19:12:16,695 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:12:16,695 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, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:12:16,696 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:12:16,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:12:16,696 INFO L82 PathProgramCache]: Analyzing trace with hash -547188926, now seen corresponding path program 1 times [2019-11-06 19:12:16,696 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:12:16,696 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107280890] [2019-11-06 19:12:16,697 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:12:16,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:12:16,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:12:16,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:12:16,917 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:12:16,917 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107280890] [2019-11-06 19:12:16,917 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:12:16,918 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-11-06 19:12:16,918 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110783527] [2019-11-06 19:12:16,918 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-06 19:12:16,919 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:12:16,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-06 19:12:16,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-11-06 19:12:16,919 INFO L87 Difference]: Start difference. First operand 1706 states and 2406 transitions. Second operand 8 states. [2019-11-06 19:12:18,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:12:18,713 INFO L93 Difference]: Finished difference Result 4298 states and 6640 transitions. [2019-11-06 19:12:18,714 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-06 19:12:18,714 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 131 [2019-11-06 19:12:18,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:12:18,734 INFO L225 Difference]: With dead ends: 4298 [2019-11-06 19:12:18,734 INFO L226 Difference]: Without dead ends: 2598 [2019-11-06 19:12:18,740 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2019-11-06 19:12:18,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2598 states. [2019-11-06 19:12:18,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2598 to 2460. [2019-11-06 19:12:18,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2460 states. [2019-11-06 19:12:18,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2460 states to 2460 states and 3319 transitions. [2019-11-06 19:12:18,857 INFO L78 Accepts]: Start accepts. Automaton has 2460 states and 3319 transitions. Word has length 131 [2019-11-06 19:12:18,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:12:18,858 INFO L462 AbstractCegarLoop]: Abstraction has 2460 states and 3319 transitions. [2019-11-06 19:12:18,858 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-06 19:12:18,858 INFO L276 IsEmpty]: Start isEmpty. Operand 2460 states and 3319 transitions. [2019-11-06 19:12:18,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2019-11-06 19:12:18,860 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:12:18,860 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:12:18,860 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:12:18,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:12:18,861 INFO L82 PathProgramCache]: Analyzing trace with hash -252421119, now seen corresponding path program 1 times [2019-11-06 19:12:18,861 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:12:18,861 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931837268] [2019-11-06 19:12:18,861 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:12:18,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:12:18,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:12:18,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:12:19,023 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 51 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:12:19,024 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931837268] [2019-11-06 19:12:19,024 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1343569933] [2019-11-06 19:12:19,024 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 19:12:19,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:12:19,101 INFO L256 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:12:19,111 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:12:19,195 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:12:19,196 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:12:19,196 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-11-06 19:12:19,197 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667290252] [2019-11-06 19:12:19,197 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 19:12:19,197 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:12:19,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 19:12:19,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:12:19,198 INFO L87 Difference]: Start difference. First operand 2460 states and 3319 transitions. Second operand 3 states. [2019-11-06 19:12:20,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:12:20,274 INFO L93 Difference]: Finished difference Result 5650 states and 7629 transitions. [2019-11-06 19:12:20,274 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 19:12:20,275 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 132 [2019-11-06 19:12:20,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:12:20,291 INFO L225 Difference]: With dead ends: 5650 [2019-11-06 19:12:20,292 INFO L226 Difference]: Without dead ends: 3196 [2019-11-06 19:12:20,299 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 135 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:12:20,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3196 states. [2019-11-06 19:12:20,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3196 to 2826. [2019-11-06 19:12:20,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2826 states. [2019-11-06 19:12:20,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2826 states to 2826 states and 3795 transitions. [2019-11-06 19:12:20,391 INFO L78 Accepts]: Start accepts. Automaton has 2826 states and 3795 transitions. Word has length 132 [2019-11-06 19:12:20,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:12:20,393 INFO L462 AbstractCegarLoop]: Abstraction has 2826 states and 3795 transitions. [2019-11-06 19:12:20,393 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 19:12:20,393 INFO L276 IsEmpty]: Start isEmpty. Operand 2826 states and 3795 transitions. [2019-11-06 19:12:20,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2019-11-06 19:12:20,401 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:12:20,402 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, 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, 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 19:12:20,606 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:12:20,606 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:12:20,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:12:20,607 INFO L82 PathProgramCache]: Analyzing trace with hash -215391879, now seen corresponding path program 1 times [2019-11-06 19:12:20,607 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:12:20,607 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678669047] [2019-11-06 19:12:20,608 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:12:20,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:12:20,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:12:20,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:12:20,934 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 51 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:12:20,934 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678669047] [2019-11-06 19:12:20,935 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959844895] [2019-11-06 19:12:20,936 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 19:12:21,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:12:21,055 INFO L256 TraceCheckSpWp]: Trace formula consists of 366 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:12:21,079 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:12:21,239 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:12:21,240 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:12:21,240 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-11-06 19:12:21,241 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162228048] [2019-11-06 19:12:21,241 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 19:12:21,241 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:12:21,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 19:12:21,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:12:21,242 INFO L87 Difference]: Start difference. First operand 2826 states and 3795 transitions. Second operand 3 states. [2019-11-06 19:12:22,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:12:22,067 INFO L93 Difference]: Finished difference Result 6018 states and 8242 transitions. [2019-11-06 19:12:22,068 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 19:12:22,068 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 224 [2019-11-06 19:12:22,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:12:22,085 INFO L225 Difference]: With dead ends: 6018 [2019-11-06 19:12:22,085 INFO L226 Difference]: Without dead ends: 3380 [2019-11-06 19:12:22,093 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 228 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:12:22,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3380 states. [2019-11-06 19:12:22,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3380 to 2834. [2019-11-06 19:12:22,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2834 states. [2019-11-06 19:12:22,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2834 states to 2834 states and 3761 transitions. [2019-11-06 19:12:22,174 INFO L78 Accepts]: Start accepts. Automaton has 2834 states and 3761 transitions. Word has length 224 [2019-11-06 19:12:22,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:12:22,175 INFO L462 AbstractCegarLoop]: Abstraction has 2834 states and 3761 transitions. [2019-11-06 19:12:22,175 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 19:12:22,176 INFO L276 IsEmpty]: Start isEmpty. Operand 2834 states and 3761 transitions. [2019-11-06 19:12:22,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 289 [2019-11-06 19:12:22,183 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:12:22,184 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, 3, 3, 3, 3, 3, 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, 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 19:12:22,387 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:12:22,389 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:12:22,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:12:22,390 INFO L82 PathProgramCache]: Analyzing trace with hash 1818380737, now seen corresponding path program 1 times [2019-11-06 19:12:22,390 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:12:22,390 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054610118] [2019-11-06 19:12:22,390 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:12:22,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:12:22,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:12:22,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:12:22,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:12:22,676 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 105 proven. 2 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2019-11-06 19:12:22,676 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054610118] [2019-11-06 19:12:22,677 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [544776069] [2019-11-06 19:12:22,677 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 19:12:22,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:12:22,813 INFO L256 TraceCheckSpWp]: Trace formula consists of 469 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:12:22,830 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:12:22,966 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 107 proven. 0 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2019-11-06 19:12:22,967 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:12:22,967 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-11-06 19:12:22,968 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76351325] [2019-11-06 19:12:22,969 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 19:12:22,969 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:12:22,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 19:12:22,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:12:22,971 INFO L87 Difference]: Start difference. First operand 2834 states and 3761 transitions. Second operand 3 states. [2019-11-06 19:12:23,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:12:23,810 INFO L93 Difference]: Finished difference Result 5478 states and 7312 transitions. [2019-11-06 19:12:23,810 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 19:12:23,810 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 288 [2019-11-06 19:12:23,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:12:23,825 INFO L225 Difference]: With dead ends: 5478 [2019-11-06 19:12:23,825 INFO L226 Difference]: Without dead ends: 2834 [2019-11-06 19:12:23,831 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 299 GetRequests, 293 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:12:23,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2834 states. [2019-11-06 19:12:23,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2834 to 2652. [2019-11-06 19:12:23,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2652 states. [2019-11-06 19:12:23,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2652 states to 2652 states and 3497 transitions. [2019-11-06 19:12:23,907 INFO L78 Accepts]: Start accepts. Automaton has 2652 states and 3497 transitions. Word has length 288 [2019-11-06 19:12:23,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:12:23,908 INFO L462 AbstractCegarLoop]: Abstraction has 2652 states and 3497 transitions. [2019-11-06 19:12:23,908 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 19:12:23,909 INFO L276 IsEmpty]: Start isEmpty. Operand 2652 states and 3497 transitions. [2019-11-06 19:12:23,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2019-11-06 19:12:23,921 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:12:23,922 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, 3, 3, 3, 3, 3, 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, 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] [2019-11-06 19:12:24,134 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:12:24,136 INFO L410 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:12:24,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:12:24,136 INFO L82 PathProgramCache]: Analyzing trace with hash 382896273, now seen corresponding path program 1 times [2019-11-06 19:12:24,137 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:12:24,139 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589535631] [2019-11-06 19:12:24,139 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:12:24,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:12:24,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:12:24,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:12:24,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:12:24,682 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 163 proven. 52 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-06 19:12:24,682 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589535631] [2019-11-06 19:12:24,682 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [627498715] [2019-11-06 19:12:24,682 INFO L94 rtionOrderModulation]: Keeping assertion order 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 [2019-11-06 19:12:24,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:12:24,833 INFO L256 TraceCheckSpWp]: Trace formula consists of 507 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-06 19:12:24,839 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:12:24,889 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 19:12:25,035 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 163 proven. 0 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2019-11-06 19:12:25,035 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:12:25,036 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 13 [2019-11-06 19:12:25,036 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101719574] [2019-11-06 19:12:25,037 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:12:25,037 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:12:25,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:12:25,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2019-11-06 19:12:25,038 INFO L87 Difference]: Start difference. First operand 2652 states and 3497 transitions. Second operand 5 states. [2019-11-06 19:12:26,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:12:26,326 INFO L93 Difference]: Finished difference Result 5142 states and 6841 transitions. [2019-11-06 19:12:26,327 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-06 19:12:26,328 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 324 [2019-11-06 19:12:26,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:12:26,341 INFO L225 Difference]: With dead ends: 5142 [2019-11-06 19:12:26,341 INFO L226 Difference]: Without dead ends: 2680 [2019-11-06 19:12:26,348 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 327 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2019-11-06 19:12:26,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2680 states. [2019-11-06 19:12:26,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2680 to 2666. [2019-11-06 19:12:26,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2666 states. [2019-11-06 19:12:26,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2666 states to 2666 states and 3480 transitions. [2019-11-06 19:12:26,429 INFO L78 Accepts]: Start accepts. Automaton has 2666 states and 3480 transitions. Word has length 324 [2019-11-06 19:12:26,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:12:26,429 INFO L462 AbstractCegarLoop]: Abstraction has 2666 states and 3480 transitions. [2019-11-06 19:12:26,430 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 19:12:26,430 INFO L276 IsEmpty]: Start isEmpty. Operand 2666 states and 3480 transitions. [2019-11-06 19:12:26,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 409 [2019-11-06 19:12:26,446 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:12:26,447 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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 19:12:26,650 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:12:26,651 INFO L410 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:12:26,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:12:26,652 INFO L82 PathProgramCache]: Analyzing trace with hash -1608334599, now seen corresponding path program 1 times [2019-11-06 19:12:26,652 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:12:26,652 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424191843] [2019-11-06 19:12:26,652 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:12:26,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:12:26,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:12:26,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:12:26,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:12:27,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:12:28,219 INFO L134 CoverageAnalysis]: Checked inductivity of 436 backedges. 166 proven. 263 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-06 19:12:28,219 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424191843] [2019-11-06 19:12:28,219 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1780595386] [2019-11-06 19:12:28,220 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:12:28,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:12:28,343 INFO L256 TraceCheckSpWp]: Trace formula consists of 630 conjuncts, 26 conjunts are in the unsatisfiable core [2019-11-06 19:12:28,350 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:12:28,409 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 4 terms [2019-11-06 19:12:28,661 INFO L134 CoverageAnalysis]: Checked inductivity of 436 backedges. 330 proven. 53 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2019-11-06 19:12:28,661 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 19:12:28,662 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8] total 16 [2019-11-06 19:12:28,662 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906725810] [2019-11-06 19:12:28,663 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-06 19:12:28,663 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:12:28,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-06 19:12:28,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2019-11-06 19:12:28,664 INFO L87 Difference]: Start difference. First operand 2666 states and 3480 transitions. Second operand 16 states. [2019-11-06 19:12:30,270 WARN L191 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 47 [2019-11-06 19:12:33,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:12:33,156 INFO L93 Difference]: Finished difference Result 5260 states and 6928 transitions. [2019-11-06 19:12:33,157 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-11-06 19:12:33,157 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 408 [2019-11-06 19:12:33,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:12:33,170 INFO L225 Difference]: With dead ends: 5260 [2019-11-06 19:12:33,170 INFO L226 Difference]: Without dead ends: 2733 [2019-11-06 19:12:33,177 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 461 GetRequests, 429 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=254, Invalid=868, Unknown=0, NotChecked=0, Total=1122 [2019-11-06 19:12:33,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2733 states. [2019-11-06 19:12:33,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2733 to 2660. [2019-11-06 19:12:33,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2660 states. [2019-11-06 19:12:33,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2660 states to 2660 states and 3229 transitions. [2019-11-06 19:12:33,241 INFO L78 Accepts]: Start accepts. Automaton has 2660 states and 3229 transitions. Word has length 408 [2019-11-06 19:12:33,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:12:33,241 INFO L462 AbstractCegarLoop]: Abstraction has 2660 states and 3229 transitions. [2019-11-06 19:12:33,241 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-06 19:12:33,242 INFO L276 IsEmpty]: Start isEmpty. Operand 2660 states and 3229 transitions. [2019-11-06 19:12:33,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 544 [2019-11-06 19:12:33,256 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:12:33,257 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 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] [2019-11-06 19:12:33,460 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:12:33,460 INFO L410 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:12:33,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:12:33,461 INFO L82 PathProgramCache]: Analyzing trace with hash -2012438250, now seen corresponding path program 1 times [2019-11-06 19:12:33,461 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:12:33,461 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247283507] [2019-11-06 19:12:33,461 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:12:33,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:12:33,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:12:33,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:12:33,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:12:33,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:12:33,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:12:34,403 INFO L134 CoverageAnalysis]: Checked inductivity of 867 backedges. 434 proven. 111 refuted. 0 times theorem prover too weak. 322 trivial. 0 not checked. [2019-11-06 19:12:34,404 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247283507] [2019-11-06 19:12:34,404 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105716391] [2019-11-06 19:12:34,404 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:12:34,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:12:34,564 INFO L256 TraceCheckSpWp]: Trace formula consists of 801 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-06 19:12:34,578 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:12:34,748 INFO L134 CoverageAnalysis]: Checked inductivity of 867 backedges. 706 proven. 2 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2019-11-06 19:12:34,749 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 19:12:34,749 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 9 [2019-11-06 19:12:34,749 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030070229] [2019-11-06 19:12:34,751 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-06 19:12:34,751 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:12:34,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-06 19:12:34,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2019-11-06 19:12:34,752 INFO L87 Difference]: Start difference. First operand 2660 states and 3229 transitions. Second operand 9 states. [2019-11-06 19:12:36,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:12:36,823 INFO L93 Difference]: Finished difference Result 5320 states and 6462 transitions. [2019-11-06 19:12:36,824 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-06 19:12:36,824 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 543 [2019-11-06 19:12:36,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:12:36,836 INFO L225 Difference]: With dead ends: 5320 [2019-11-06 19:12:36,837 INFO L226 Difference]: Without dead ends: 2850 [2019-11-06 19:12:36,843 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 570 GetRequests, 556 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2019-11-06 19:12:36,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2850 states. [2019-11-06 19:12:36,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2850 to 2664. [2019-11-06 19:12:36,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2664 states. [2019-11-06 19:12:36,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2664 states to 2664 states and 3080 transitions. [2019-11-06 19:12:36,951 INFO L78 Accepts]: Start accepts. Automaton has 2664 states and 3080 transitions. Word has length 543 [2019-11-06 19:12:36,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:12:36,952 INFO L462 AbstractCegarLoop]: Abstraction has 2664 states and 3080 transitions. [2019-11-06 19:12:36,952 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-06 19:12:36,952 INFO L276 IsEmpty]: Start isEmpty. Operand 2664 states and 3080 transitions. [2019-11-06 19:12:36,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 628 [2019-11-06 19:12:36,971 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:12:36,972 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 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] [2019-11-06 19:12:37,181 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:12:37,181 INFO L410 AbstractCegarLoop]: === Iteration 11 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:12:37,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:12:37,183 INFO L82 PathProgramCache]: Analyzing trace with hash 410369790, now seen corresponding path program 1 times [2019-11-06 19:12:37,183 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:12:37,183 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735424862] [2019-11-06 19:12:37,183 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:12:37,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:12:37,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:12:37,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:12:37,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:12:37,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:12:37,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:12:37,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat