/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/Problem16_label49.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 19:19:01,184 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 19:19:01,186 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 19:19:01,203 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-06 19:19:01,217 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 19:19:01,218 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 19:19:01,219 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 19:19:01,222 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 19:19:01,223 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 19:19:01,224 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 19:19:01,226 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 19:19:01,228 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 19:19:01,229 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 19:19:01,230 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 19:19:01,231 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 19:19:01,232 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 19:19:01,234 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 19:19:01,242 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 19:19:01,243 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 19:19:01,244 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 19:19:01,244 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 19:19:01,259 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 19:19:01,259 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 19:19:01,260 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 19:19:01,260 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 19:19:01,261 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 19:19:01,261 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 19:19:01,261 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 19:19:01,261 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 19:19:01,261 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 19:19:01,262 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 19:19:01,262 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 19:19:01,262 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 19:19:01,262 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 19:19:01,262 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 19:19:01,263 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 19:19:01,263 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 19:19:01,263 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 19:19:01,263 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 19:19:01,263 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 19:19:01,264 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 19:19:01,264 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 19:19:01,264 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 19:19:01,264 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 19:19:01,265 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 19:19:01,265 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 19:19:01,265 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 19:19:01,265 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 19:19:01,265 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 19:19:01,266 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-06 19:19:01,559 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 19:19:01,578 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 19:19:01,583 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 19:19:01,585 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 19:19:01,585 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 19:19:01,586 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem16_label49.c [2019-11-06 19:19:01,662 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/43ac9d4a0/2acae505c56d405999d847a6baaee7fe/FLAGbaa1ac85d [2019-11-06 19:19:02,283 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 19:19:02,285 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem16_label49.c [2019-11-06 19:19:02,300 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/43ac9d4a0/2acae505c56d405999d847a6baaee7fe/FLAGbaa1ac85d [2019-11-06 19:19:02,464 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/43ac9d4a0/2acae505c56d405999d847a6baaee7fe [2019-11-06 19:19:02,472 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 19:19:02,473 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 19:19:02,474 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 19:19:02,474 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 19:19:02,478 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 19:19:02,479 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:19:02" (1/1) ... [2019-11-06 19:19:02,488 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@56069b0d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:19:02, skipping insertion in model container [2019-11-06 19:19:02,489 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:19:02" (1/1) ... [2019-11-06 19:19:02,496 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 19:19:02,577 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 19:19:03,359 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 19:19:03,371 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 19:19:03,616 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 19:19:03,639 INFO L192 MainTranslator]: Completed translation [2019-11-06 19:19:03,640 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:19:03 WrapperNode [2019-11-06 19:19:03,640 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 19:19:03,641 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 19:19:03,641 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 19:19:03,641 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 19:19:03,657 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:19:03" (1/1) ... [2019-11-06 19:19:03,657 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:19:03" (1/1) ... [2019-11-06 19:19:03,700 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:19:03" (1/1) ... [2019-11-06 19:19:03,700 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:19:03" (1/1) ... [2019-11-06 19:19:03,760 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:19:03" (1/1) ... [2019-11-06 19:19:03,779 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:19:03" (1/1) ... [2019-11-06 19:19:03,796 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:19:03" (1/1) ... [2019-11-06 19:19:03,810 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 19:19:03,810 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 19:19:03,811 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 19:19:03,811 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 19:19:03,812 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:19:03" (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 19:19:03,891 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 19:19:03,892 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 19:19:03,892 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 19:19:03,892 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-11-06 19:19:03,893 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 19:19:03,893 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 19:19:03,893 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-11-06 19:19:03,893 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 19:19:03,894 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 19:19:03,894 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 19:19:03,894 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 19:19:03,894 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 19:19:03,895 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 19:19:06,563 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 19:19:06,563 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 19:19:06,568 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:19:06 BoogieIcfgContainer [2019-11-06 19:19:06,568 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 19:19:06,569 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 19:19:06,570 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 19:19:06,574 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 19:19:06,575 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 07:19:02" (1/3) ... [2019-11-06 19:19:06,576 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@81a1d33 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:19:06, skipping insertion in model container [2019-11-06 19:19:06,576 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:19:03" (2/3) ... [2019-11-06 19:19:06,577 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@81a1d33 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:19:06, skipping insertion in model container [2019-11-06 19:19:06,577 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:19:06" (3/3) ... [2019-11-06 19:19:06,583 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem16_label49.c [2019-11-06 19:19:06,597 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 19:19:06,606 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 19:19:06,618 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 19:19:06,661 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 19:19:06,661 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 19:19:06,661 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 19:19:06,661 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 19:19:06,661 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 19:19:06,661 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 19:19:06,662 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 19:19:06,662 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 19:19:06,700 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states. [2019-11-06 19:19:06,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2019-11-06 19:19:06,712 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:19:06,713 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, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:19:06,715 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:19:06,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:19:06,721 INFO L82 PathProgramCache]: Analyzing trace with hash -971896627, now seen corresponding path program 1 times [2019-11-06 19:19:06,731 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:19:06,731 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052929731] [2019-11-06 19:19:06,731 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:19:06,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:07,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:07,261 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 19:19:07,261 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052929731] [2019-11-06 19:19:07,262 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:19:07,263 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 19:19:07,265 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313154798] [2019-11-06 19:19:07,271 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:19:07,272 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:19:07,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:19:07,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-06 19:19:07,289 INFO L87 Difference]: Start difference. First operand 409 states. Second operand 5 states. [2019-11-06 19:19:13,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:19:13,893 INFO L93 Difference]: Finished difference Result 1530 states and 2865 transitions. [2019-11-06 19:19:13,893 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 19:19:13,894 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 66 [2019-11-06 19:19:13,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:19:13,922 INFO L225 Difference]: With dead ends: 1530 [2019-11-06 19:19:13,923 INFO L226 Difference]: Without dead ends: 1038 [2019-11-06 19:19:13,936 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:19:13,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1038 states. [2019-11-06 19:19:14,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1038 to 1031. [2019-11-06 19:19:14,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1031 states. [2019-11-06 19:19:14,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1031 states to 1031 states and 1703 transitions. [2019-11-06 19:19:14,062 INFO L78 Accepts]: Start accepts. Automaton has 1031 states and 1703 transitions. Word has length 66 [2019-11-06 19:19:14,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:19:14,063 INFO L462 AbstractCegarLoop]: Abstraction has 1031 states and 1703 transitions. [2019-11-06 19:19:14,063 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 19:19:14,063 INFO L276 IsEmpty]: Start isEmpty. Operand 1031 states and 1703 transitions. [2019-11-06 19:19:14,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2019-11-06 19:19:14,071 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:19:14,071 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, 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 19:19:14,072 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:19:14,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:19:14,072 INFO L82 PathProgramCache]: Analyzing trace with hash -653341620, now seen corresponding path program 1 times [2019-11-06 19:19:14,072 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:19:14,073 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221522882] [2019-11-06 19:19:14,073 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:19:14,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:14,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:14,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:14,372 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 59 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:19:14,372 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221522882] [2019-11-06 19:19:14,373 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:19:14,374 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-11-06 19:19:14,374 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030007737] [2019-11-06 19:19:14,378 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-06 19:19:14,379 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:19:14,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-06 19:19:14,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-11-06 19:19:14,379 INFO L87 Difference]: Start difference. First operand 1031 states and 1703 transitions. Second operand 9 states. [2019-11-06 19:19:21,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:19:21,017 INFO L93 Difference]: Finished difference Result 3128 states and 5278 transitions. [2019-11-06 19:19:21,020 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-06 19:19:21,021 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 136 [2019-11-06 19:19:21,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:19:21,040 INFO L225 Difference]: With dead ends: 3128 [2019-11-06 19:19:21,040 INFO L226 Difference]: Without dead ends: 2103 [2019-11-06 19:19:21,045 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2019-11-06 19:19:21,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2103 states. [2019-11-06 19:19:21,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2103 to 2069. [2019-11-06 19:19:21,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2069 states. [2019-11-06 19:19:21,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2069 states to 2069 states and 3304 transitions. [2019-11-06 19:19:21,170 INFO L78 Accepts]: Start accepts. Automaton has 2069 states and 3304 transitions. Word has length 136 [2019-11-06 19:19:21,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:19:21,172 INFO L462 AbstractCegarLoop]: Abstraction has 2069 states and 3304 transitions. [2019-11-06 19:19:21,172 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-06 19:19:21,173 INFO L276 IsEmpty]: Start isEmpty. Operand 2069 states and 3304 transitions. [2019-11-06 19:19:21,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2019-11-06 19:19:21,186 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:19:21,187 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, 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 19:19:21,187 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:19:21,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:19:21,187 INFO L82 PathProgramCache]: Analyzing trace with hash 1932739549, now seen corresponding path program 1 times [2019-11-06 19:19:21,188 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:19:21,188 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395497803] [2019-11-06 19:19:21,188 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:19:21,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:21,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:21,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:21,459 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 59 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:19:21,459 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395497803] [2019-11-06 19:19:21,460 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:19:21,460 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-11-06 19:19:21,461 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437426837] [2019-11-06 19:19:21,463 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-06 19:19:21,463 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:19:21,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-06 19:19:21,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-11-06 19:19:21,464 INFO L87 Difference]: Start difference. First operand 2069 states and 3304 transitions. Second operand 8 states. [2019-11-06 19:19:25,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:19:25,694 INFO L93 Difference]: Finished difference Result 5214 states and 8402 transitions. [2019-11-06 19:19:25,695 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-06 19:19:25,695 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 137 [2019-11-06 19:19:25,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:19:25,716 INFO L225 Difference]: With dead ends: 5214 [2019-11-06 19:19:25,716 INFO L226 Difference]: Without dead ends: 3151 [2019-11-06 19:19:25,729 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 19:19:25,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3151 states. [2019-11-06 19:19:25,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3151 to 2096. [2019-11-06 19:19:25,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2096 states. [2019-11-06 19:19:25,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2096 states to 2096 states and 2805 transitions. [2019-11-06 19:19:25,822 INFO L78 Accepts]: Start accepts. Automaton has 2096 states and 2805 transitions. Word has length 137 [2019-11-06 19:19:25,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:19:25,824 INFO L462 AbstractCegarLoop]: Abstraction has 2096 states and 2805 transitions. [2019-11-06 19:19:25,824 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-06 19:19:25,824 INFO L276 IsEmpty]: Start isEmpty. Operand 2096 states and 2805 transitions. [2019-11-06 19:19:25,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2019-11-06 19:19:25,829 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:19:25,829 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, 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] [2019-11-06 19:19:25,830 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:19:25,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:19:25,830 INFO L82 PathProgramCache]: Analyzing trace with hash 1687278437, now seen corresponding path program 1 times [2019-11-06 19:19:25,830 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:19:25,831 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89981942] [2019-11-06 19:19:25,831 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:19:25,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:25,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:26,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:26,303 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 59 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:19:26,303 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89981942] [2019-11-06 19:19:26,303 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:19:26,303 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-11-06 19:19:26,304 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332074538] [2019-11-06 19:19:26,304 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-06 19:19:26,304 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:19:26,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-06 19:19:26,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-11-06 19:19:26,305 INFO L87 Difference]: Start difference. First operand 2096 states and 2805 transitions. Second operand 9 states. [2019-11-06 19:19:32,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:19:32,036 INFO L93 Difference]: Finished difference Result 8373 states and 11591 transitions. [2019-11-06 19:19:32,037 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-06 19:19:32,037 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 229 [2019-11-06 19:19:32,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:19:32,069 INFO L225 Difference]: With dead ends: 8373 [2019-11-06 19:19:32,070 INFO L226 Difference]: Without dead ends: 6283 [2019-11-06 19:19:32,076 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2019-11-06 19:19:32,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6283 states. [2019-11-06 19:19:32,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6283 to 6269. [2019-11-06 19:19:32,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6269 states. [2019-11-06 19:19:32,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6269 states to 6269 states and 8083 transitions. [2019-11-06 19:19:32,240 INFO L78 Accepts]: Start accepts. Automaton has 6269 states and 8083 transitions. Word has length 229 [2019-11-06 19:19:32,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:19:32,242 INFO L462 AbstractCegarLoop]: Abstraction has 6269 states and 8083 transitions. [2019-11-06 19:19:32,242 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-06 19:19:32,242 INFO L276 IsEmpty]: Start isEmpty. Operand 6269 states and 8083 transitions. [2019-11-06 19:19:32,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 316 [2019-11-06 19:19:32,249 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:19:32,249 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:19:32,250 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:19:32,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:19:32,250 INFO L82 PathProgramCache]: Analyzing trace with hash -1656258471, now seen corresponding path program 1 times [2019-11-06 19:19:32,250 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:19:32,251 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965339412] [2019-11-06 19:19:32,251 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:19:32,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:32,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:32,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:32,695 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 58 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:19:32,696 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965339412] [2019-11-06 19:19:32,696 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [630219636] [2019-11-06 19:19:32,696 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 19:19:32,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:32,830 INFO L256 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:19:32,846 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:19:33,016 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 59 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:19:33,017 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:19:33,017 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-11-06 19:19:33,018 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247424284] [2019-11-06 19:19:33,018 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 19:19:33,019 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:19:33,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 19:19:33,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:19:33,019 INFO L87 Difference]: Start difference. First operand 6269 states and 8083 transitions. Second operand 3 states. [2019-11-06 19:19:34,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:19:34,629 INFO L93 Difference]: Finished difference Result 12532 states and 16169 transitions. [2019-11-06 19:19:34,629 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 19:19:34,630 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 315 [2019-11-06 19:19:34,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:19:34,659 INFO L225 Difference]: With dead ends: 12532 [2019-11-06 19:19:34,659 INFO L226 Difference]: Without dead ends: 6269 [2019-11-06 19:19:34,675 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 324 GetRequests, 318 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 19:19:34,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6269 states. [2019-11-06 19:19:34,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6269 to 5932. [2019-11-06 19:19:34,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5932 states. [2019-11-06 19:19:34,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5932 states to 5932 states and 7457 transitions. [2019-11-06 19:19:34,838 INFO L78 Accepts]: Start accepts. Automaton has 5932 states and 7457 transitions. Word has length 315 [2019-11-06 19:19:34,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:19:34,839 INFO L462 AbstractCegarLoop]: Abstraction has 5932 states and 7457 transitions. [2019-11-06 19:19:34,839 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 19:19:34,840 INFO L276 IsEmpty]: Start isEmpty. Operand 5932 states and 7457 transitions. [2019-11-06 19:19:34,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 471 [2019-11-06 19:19:34,853 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:19:34,854 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, 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, 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] [2019-11-06 19:19:35,060 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:19:35,060 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:19:35,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:19:35,061 INFO L82 PathProgramCache]: Analyzing trace with hash -1176610783, now seen corresponding path program 1 times [2019-11-06 19:19:35,061 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:19:35,061 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795088127] [2019-11-06 19:19:35,062 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:19:35,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:35,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:35,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:35,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:35,711 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 110 proven. 2 refuted. 0 times theorem prover too weak. 163 trivial. 0 not checked. [2019-11-06 19:19:35,712 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795088127] [2019-11-06 19:19:35,712 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [658725631] [2019-11-06 19:19:35,712 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 19:19:35,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:35,901 INFO L256 TraceCheckSpWp]: Trace formula consists of 653 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:19:35,912 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:19:36,060 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 121 proven. 0 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2019-11-06 19:19:36,060 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:19:36,061 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 6 [2019-11-06 19:19:36,061 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496853782] [2019-11-06 19:19:36,062 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 19:19:36,062 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:19:36,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 19:19:36,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-06 19:19:36,063 INFO L87 Difference]: Start difference. First operand 5932 states and 7457 transitions. Second operand 3 states. [2019-11-06 19:19:37,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:19:37,609 INFO L93 Difference]: Finished difference Result 7958 states and 9766 transitions. [2019-11-06 19:19:37,609 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 19:19:37,609 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 470 [2019-11-06 19:19:37,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:19:37,641 INFO L225 Difference]: With dead ends: 7958 [2019-11-06 19:19:37,641 INFO L226 Difference]: Without dead ends: 7956 [2019-11-06 19:19:37,645 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 483 GetRequests, 473 SyntacticMatches, 6 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-06 19:19:37,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7956 states. [2019-11-06 19:19:37,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7956 to 6608. [2019-11-06 19:19:37,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6608 states. [2019-11-06 19:19:37,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6608 states to 6608 states and 8271 transitions. [2019-11-06 19:19:37,802 INFO L78 Accepts]: Start accepts. Automaton has 6608 states and 8271 transitions. Word has length 470 [2019-11-06 19:19:37,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:19:37,803 INFO L462 AbstractCegarLoop]: Abstraction has 6608 states and 8271 transitions. [2019-11-06 19:19:37,803 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 19:19:37,803 INFO L276 IsEmpty]: Start isEmpty. Operand 6608 states and 8271 transitions. [2019-11-06 19:19:37,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 502 [2019-11-06 19:19:37,817 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:19:37,818 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, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:19:38,021 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:19:38,022 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:19:38,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:19:38,023 INFO L82 PathProgramCache]: Analyzing trace with hash 106035057, now seen corresponding path program 1 times [2019-11-06 19:19:38,023 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:19:38,023 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314720556] [2019-11-06 19:19:38,023 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:19:38,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:38,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:38,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:38,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:38,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:38,771 INFO L134 CoverageAnalysis]: Checked inductivity of 434 backedges. 293 proven. 70 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2019-11-06 19:19:38,771 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314720556] [2019-11-06 19:19:38,772 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1356261737] [2019-11-06 19:19:38,772 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 19:19:38,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:38,952 INFO L256 TraceCheckSpWp]: Trace formula consists of 724 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:19:38,958 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:19:39,227 INFO L134 CoverageAnalysis]: Checked inductivity of 434 backedges. 372 proven. 2 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2019-11-06 19:19:39,228 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 19:19:39,228 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2019-11-06 19:19:39,230 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820503172] [2019-11-06 19:19:39,231 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-06 19:19:39,232 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:19:39,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-06 19:19:39,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-11-06 19:19:39,234 INFO L87 Difference]: Start difference. First operand 6608 states and 8271 transitions. Second operand 11 states.