/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_label39.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 19:18:37,244 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 19:18:37,247 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 19:18:37,266 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-06 19:18:37,322 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 19:18:37,326 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 19:18:37,327 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 19:18:37,329 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 19:18:37,352 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 19:18:37,353 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 19:18:37,355 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 19:18:37,355 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 19:18:37,355 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 19:18:37,356 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 19:18:37,356 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 19:18:37,356 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 19:18:37,356 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 19:18:37,356 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 19:18:37,358 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 19:18:37,358 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 19:18:37,358 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 19:18:37,359 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 19:18:37,359 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 19:18:37,359 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 19:18:37,359 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 19:18:37,359 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 19:18:37,360 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 19:18:37,360 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 19:18:37,360 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 19:18:37,360 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 19:18:37,361 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 19:18:37,361 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 19:18:37,361 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 19:18:37,361 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 19:18:37,361 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 19:18:37,362 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 19:18:37,362 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-06 19:18:37,666 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 19:18:37,678 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 19:18:37,681 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 19:18:37,683 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 19:18:37,683 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 19:18:37,684 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem16_label39.c [2019-11-06 19:18:37,746 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8fc270346/26cc0107b33443c4ad6997204d9d39b0/FLAG74b03aa6e [2019-11-06 19:18:38,379 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 19:18:38,382 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem16_label39.c [2019-11-06 19:18:38,406 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8fc270346/26cc0107b33443c4ad6997204d9d39b0/FLAG74b03aa6e [2019-11-06 19:18:38,582 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8fc270346/26cc0107b33443c4ad6997204d9d39b0 [2019-11-06 19:18:38,592 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 19:18:38,594 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 19:18:38,595 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 19:18:38,595 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 19:18:38,598 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 19:18:38,599 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:18:38" (1/1) ... [2019-11-06 19:18:38,602 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@691c9e00 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:18:38, skipping insertion in model container [2019-11-06 19:18:38,603 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:18:38" (1/1) ... [2019-11-06 19:18:38,611 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 19:18:38,702 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 19:18:39,492 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 19:18:39,508 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 19:18:39,871 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 19:18:39,893 INFO L192 MainTranslator]: Completed translation [2019-11-06 19:18:39,894 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:18:39 WrapperNode [2019-11-06 19:18:39,895 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 19:18:39,895 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 19:18:39,896 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 19:18:39,896 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 19:18:39,910 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:18:39" (1/1) ... [2019-11-06 19:18:39,910 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:18:39" (1/1) ... [2019-11-06 19:18:39,959 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:18:39" (1/1) ... [2019-11-06 19:18:39,959 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:18:39" (1/1) ... [2019-11-06 19:18:40,035 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:18:39" (1/1) ... [2019-11-06 19:18:40,051 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:18:39" (1/1) ... [2019-11-06 19:18:40,076 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:18:39" (1/1) ... [2019-11-06 19:18:40,093 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 19:18:40,094 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 19:18:40,094 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 19:18:40,094 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 19:18:40,095 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:18:39" (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 19:18:40,150 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 19:18:40,151 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 19:18:40,151 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 19:18:40,151 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-11-06 19:18:40,151 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 19:18:40,152 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 19:18:40,152 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-11-06 19:18:40,152 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 19:18:40,152 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 19:18:40,152 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 19:18:40,153 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 19:18:40,153 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 19:18:40,153 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 19:18:42,474 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 19:18:42,475 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 19:18:42,476 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:18:42 BoogieIcfgContainer [2019-11-06 19:18:42,476 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 19:18:42,478 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 19:18:42,478 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 19:18:42,481 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 19:18:42,481 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 07:18:38" (1/3) ... [2019-11-06 19:18:42,482 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24a5b4af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:18:42, skipping insertion in model container [2019-11-06 19:18:42,482 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:18:39" (2/3) ... [2019-11-06 19:18:42,483 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24a5b4af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:18:42, skipping insertion in model container [2019-11-06 19:18:42,483 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:18:42" (3/3) ... [2019-11-06 19:18:42,485 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem16_label39.c [2019-11-06 19:18:42,494 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 19:18:42,503 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 19:18:42,515 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 19:18:42,544 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 19:18:42,545 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 19:18:42,545 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 19:18:42,545 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 19:18:42,545 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 19:18:42,545 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 19:18:42,545 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 19:18:42,546 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 19:18:42,580 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states. [2019-11-06 19:18:42,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2019-11-06 19:18:42,590 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:18:42,591 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] [2019-11-06 19:18:42,593 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:18:42,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:18:42,601 INFO L82 PathProgramCache]: Analyzing trace with hash 697070738, now seen corresponding path program 1 times [2019-11-06 19:18:42,611 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:18:42,612 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331814824] [2019-11-06 19:18:42,612 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:18:42,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:43,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:43,071 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 19:18:43,071 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331814824] [2019-11-06 19:18:43,072 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:18:43,073 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 19:18:43,074 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658459306] [2019-11-06 19:18:43,079 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:18:43,080 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:18:43,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:18:43,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-06 19:18:43,097 INFO L87 Difference]: Start difference. First operand 409 states. Second operand 5 states. [2019-11-06 19:18:47,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:18:47,998 INFO L93 Difference]: Finished difference Result 1530 states and 2865 transitions. [2019-11-06 19:18:47,999 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 19:18:48,000 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 55 [2019-11-06 19:18:48,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:18:48,027 INFO L225 Difference]: With dead ends: 1530 [2019-11-06 19:18:48,027 INFO L226 Difference]: Without dead ends: 1038 [2019-11-06 19:18:48,038 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 19:18:48,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1038 states. [2019-11-06 19:18:48,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1038 to 1031. [2019-11-06 19:18:48,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1031 states. [2019-11-06 19:18:48,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1031 states to 1031 states and 1787 transitions. [2019-11-06 19:18:48,166 INFO L78 Accepts]: Start accepts. Automaton has 1031 states and 1787 transitions. Word has length 55 [2019-11-06 19:18:48,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:18:48,167 INFO L462 AbstractCegarLoop]: Abstraction has 1031 states and 1787 transitions. [2019-11-06 19:18:48,167 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 19:18:48,167 INFO L276 IsEmpty]: Start isEmpty. Operand 1031 states and 1787 transitions. [2019-11-06 19:18:48,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2019-11-06 19:18:48,178 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:18:48,178 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, 1, 1, 1, 1, 1, 1, 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 19:18:48,178 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:18:48,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:18:48,181 INFO L82 PathProgramCache]: Analyzing trace with hash -1449951553, now seen corresponding path program 1 times [2019-11-06 19:18:48,181 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:18:48,182 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855868627] [2019-11-06 19:18:48,182 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:18:48,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:48,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:48,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:48,514 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:18:48,514 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855868627] [2019-11-06 19:18:48,514 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:18:48,515 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-11-06 19:18:48,515 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905395193] [2019-11-06 19:18:48,517 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-06 19:18:48,517 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:18:48,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-06 19:18:48,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-11-06 19:18:48,518 INFO L87 Difference]: Start difference. First operand 1031 states and 1787 transitions. Second operand 8 states. [2019-11-06 19:18:52,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:18:52,218 INFO L93 Difference]: Finished difference Result 3125 states and 5529 transitions. [2019-11-06 19:18:52,220 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-06 19:18:52,221 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 124 [2019-11-06 19:18:52,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:18:52,240 INFO L225 Difference]: With dead ends: 3125 [2019-11-06 19:18:52,240 INFO L226 Difference]: Without dead ends: 2100 [2019-11-06 19:18:52,244 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 19:18:52,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2100 states. [2019-11-06 19:18:52,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2100 to 1384. [2019-11-06 19:18:52,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1384 states. [2019-11-06 19:18:52,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1384 states to 1384 states and 2288 transitions. [2019-11-06 19:18:52,358 INFO L78 Accepts]: Start accepts. Automaton has 1384 states and 2288 transitions. Word has length 124 [2019-11-06 19:18:52,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:18:52,361 INFO L462 AbstractCegarLoop]: Abstraction has 1384 states and 2288 transitions. [2019-11-06 19:18:52,361 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-06 19:18:52,361 INFO L276 IsEmpty]: Start isEmpty. Operand 1384 states and 2288 transitions. [2019-11-06 19:18:52,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2019-11-06 19:18:52,376 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:18:52,377 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:18:52,377 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:18:52,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:18:52,382 INFO L82 PathProgramCache]: Analyzing trace with hash 1240041174, now seen corresponding path program 1 times [2019-11-06 19:18:52,382 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:18:52,382 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199417117] [2019-11-06 19:18:52,382 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:18:52,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:52,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:52,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:52,674 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:18:52,675 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199417117] [2019-11-06 19:18:52,676 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:18:52,676 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-11-06 19:18:52,676 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121010644] [2019-11-06 19:18:52,678 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-06 19:18:52,678 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:18:52,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-06 19:18:52,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-11-06 19:18:52,679 INFO L87 Difference]: Start difference. First operand 1384 states and 2288 transitions. Second operand 9 states. [2019-11-06 19:18:57,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:18:57,769 INFO L93 Difference]: Finished difference Result 4170 states and 6860 transitions. [2019-11-06 19:18:57,774 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-06 19:18:57,774 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 127 [2019-11-06 19:18:57,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:18:57,793 INFO L225 Difference]: With dead ends: 4170 [2019-11-06 19:18:57,793 INFO L226 Difference]: Without dead ends: 2792 [2019-11-06 19:18:57,806 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2019-11-06 19:18:57,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2792 states. [2019-11-06 19:18:57,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2792 to 2773. [2019-11-06 19:18:57,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2773 states. [2019-11-06 19:18:57,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2773 states to 2773 states and 3895 transitions. [2019-11-06 19:18:57,900 INFO L78 Accepts]: Start accepts. Automaton has 2773 states and 3895 transitions. Word has length 127 [2019-11-06 19:18:57,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:18:57,902 INFO L462 AbstractCegarLoop]: Abstraction has 2773 states and 3895 transitions. [2019-11-06 19:18:57,902 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-06 19:18:57,903 INFO L276 IsEmpty]: Start isEmpty. Operand 2773 states and 3895 transitions. [2019-11-06 19:18:57,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2019-11-06 19:18:57,909 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:18:57,909 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, 2, 2, 2, 2, 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] [2019-11-06 19:18:57,910 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:18:57,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:18:57,910 INFO L82 PathProgramCache]: Analyzing trace with hash 1333014138, now seen corresponding path program 1 times [2019-11-06 19:18:57,910 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:18:57,911 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982317082] [2019-11-06 19:18:57,911 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:18:57,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:58,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:58,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:58,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:58,347 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 96 proven. 71 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-06 19:18:58,348 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982317082] [2019-11-06 19:18:58,348 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1642968868] [2019-11-06 19:18:58,348 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 19:18:58,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:58,474 INFO L256 TraceCheckSpWp]: Trace formula consists of 436 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 19:18:58,486 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:18:58,631 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 123 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2019-11-06 19:18:58,631 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:18:58,632 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 11 [2019-11-06 19:18:58,632 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445709856] [2019-11-06 19:18:58,633 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:18:58,634 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:18:58,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:18:58,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-11-06 19:18:58,635 INFO L87 Difference]: Start difference. First operand 2773 states and 3895 transitions. Second operand 5 states. [2019-11-06 19:19:02,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:19:02,251 INFO L93 Difference]: Finished difference Result 7666 states and 11136 transitions. [2019-11-06 19:19:02,251 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-06 19:19:02,251 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 247 [2019-11-06 19:19:02,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:19:02,276 INFO L225 Difference]: With dead ends: 7666 [2019-11-06 19:19:02,276 INFO L226 Difference]: Without dead ends: 4899 [2019-11-06 19:19:02,284 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 247 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2019-11-06 19:19:02,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4899 states. [2019-11-06 19:19:02,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4899 to 4868. [2019-11-06 19:19:02,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4868 states. [2019-11-06 19:19:02,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4868 states to 4868 states and 6452 transitions. [2019-11-06 19:19:02,420 INFO L78 Accepts]: Start accepts. Automaton has 4868 states and 6452 transitions. Word has length 247 [2019-11-06 19:19:02,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:19:02,420 INFO L462 AbstractCegarLoop]: Abstraction has 4868 states and 6452 transitions. [2019-11-06 19:19:02,420 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 19:19:02,421 INFO L276 IsEmpty]: Start isEmpty. Operand 4868 states and 6452 transitions. [2019-11-06 19:19:02,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 394 [2019-11-06 19:19:02,430 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:19:02,431 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:19:02,635 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:19:02,635 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:19:02,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:19:02,636 INFO L82 PathProgramCache]: Analyzing trace with hash -901742510, now seen corresponding path program 1 times [2019-11-06 19:19:02,636 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:19:02,636 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972203595] [2019-11-06 19:19:02,636 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:19:02,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:02,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:02,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:02,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:02,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:03,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:03,136 INFO L134 CoverageAnalysis]: Checked inductivity of 665 backedges. 277 proven. 151 refuted. 0 times theorem prover too weak. 237 trivial. 0 not checked. [2019-11-06 19:19:03,136 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972203595] [2019-11-06 19:19:03,137 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1106639952] [2019-11-06 19:19:03,137 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 19:19:03,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:03,261 INFO L256 TraceCheckSpWp]: Trace formula consists of 662 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:19:03,272 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:19:03,466 INFO L134 CoverageAnalysis]: Checked inductivity of 665 backedges. 493 proven. 2 refuted. 0 times theorem prover too weak. 170 trivial. 0 not checked. [2019-11-06 19:19:03,466 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 19:19:03,466 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 11 [2019-11-06 19:19:03,467 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298107165] [2019-11-06 19:19:03,468 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-06 19:19:03,468 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:19:03,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-06 19:19:03,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-11-06 19:19:03,469 INFO L87 Difference]: Start difference. First operand 4868 states and 6452 transitions. Second operand 11 states. [2019-11-06 19:19:07,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:19:07,669 INFO L93 Difference]: Finished difference Result 12166 states and 16609 transitions. [2019-11-06 19:19:07,670 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-06 19:19:07,670 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 393 [2019-11-06 19:19:07,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:19:07,701 INFO L225 Difference]: With dead ends: 12166 [2019-11-06 19:19:07,701 INFO L226 Difference]: Without dead ends: 7304 [2019-11-06 19:19:07,716 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 419 GetRequests, 402 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2019-11-06 19:19:07,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7304 states. [2019-11-06 19:19:07,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7304 to 5220. [2019-11-06 19:19:07,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5220 states. [2019-11-06 19:19:07,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5220 states to 5220 states and 6864 transitions. [2019-11-06 19:19:07,871 INFO L78 Accepts]: Start accepts. Automaton has 5220 states and 6864 transitions. Word has length 393 [2019-11-06 19:19:07,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:19:07,872 INFO L462 AbstractCegarLoop]: Abstraction has 5220 states and 6864 transitions. [2019-11-06 19:19:07,872 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-06 19:19:07,873 INFO L276 IsEmpty]: Start isEmpty. Operand 5220 states and 6864 transitions. [2019-11-06 19:19:07,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 516 [2019-11-06 19:19:07,886 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:19:07,887 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, 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, 3, 3, 3, 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] [2019-11-06 19:19:08,091 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:19:08,091 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:19:08,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:19:08,092 INFO L82 PathProgramCache]: Analyzing trace with hash 1396775246, now seen corresponding path program 1 times [2019-11-06 19:19:08,092 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:19:08,092 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488987946] [2019-11-06 19:19:08,092 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:19:08,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:08,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:08,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:08,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:08,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:08,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:09,060 INFO L134 CoverageAnalysis]: Checked inductivity of 838 backedges. 297 proven. 227 refuted. 0 times theorem prover too weak. 314 trivial. 0 not checked. [2019-11-06 19:19:09,061 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488987946] [2019-11-06 19:19:09,061 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035673567] [2019-11-06 19:19:09,061 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 19:19:09,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:09,225 INFO L256 TraceCheckSpWp]: Trace formula consists of 784 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:19:09,234 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:19:09,446 INFO L134 CoverageAnalysis]: Checked inductivity of 838 backedges. 690 proven. 2 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2019-11-06 19:19:09,447 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 19:19:09,447 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 12 [2019-11-06 19:19:09,447 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766311738] [2019-11-06 19:19:09,449 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-06 19:19:09,449 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:19:09,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-06 19:19:09,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2019-11-06 19:19:09,450 INFO L87 Difference]: Start difference. First operand 5220 states and 6864 transitions. Second operand 12 states.