/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --abstractinterpretationv2.abstract.domain IntervalDomain --traceabstraction.trace.refinement.strategy TAIPAN --traceabstraction.abstract.interpretation.mode USE_PREDICATES -i ../../../trunk/examples/svcomp/eca-rers2012/Problem11_label51.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 22:47:37,545 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 22:47:37,548 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 22:47:37,560 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-06 22:47:37,570 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 22:47:37,571 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 22:47:37,572 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 22:47:37,573 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 22:47:37,574 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 22:47:37,575 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 22:47:37,576 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 22:47:37,578 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 22:47:37,580 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 22:47:37,581 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 22:47:37,582 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 22:47:37,583 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 22:47:37,585 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 22:47:37,592 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 22:47:37,593 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 22:47:37,594 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 22:47:37,595 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-06 22:47:37,612 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 22:47:37,615 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 22:47:37,616 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 22:47:37,616 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 22:47:37,617 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 22:47:37,618 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 22:47:37,618 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 22:47:37,618 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 22:47:37,618 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 22:47:37,618 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 22:47:37,619 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 22:47:37,619 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 22:47:37,619 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 22:47:37,619 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 22:47:37,619 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 22:47:37,621 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 22:47:37,621 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 22:47:37,621 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 22:47:37,621 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 22:47:37,622 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 22:47:37,622 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 22:47:37,622 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 22:47:37,622 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 22:47:37,622 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 22:47:37,623 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 22:47:37,623 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 22:47:37,623 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 22:47:37,623 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 22:47:37,623 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2: Abstract domain -> IntervalDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Abstract interpretation Mode -> USE_PREDICATES [2019-11-06 22:47:37,905 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 22:47:37,919 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 22:47:37,923 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 22:47:37,924 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 22:47:37,925 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 22:47:37,925 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem11_label51.c [2019-11-06 22:47:37,987 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d27b4dff9/46272f63fd6646c0962f01ad8e55d839/FLAG1fdc23fe9 [2019-11-06 22:47:38,593 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 22:47:38,596 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem11_label51.c [2019-11-06 22:47:38,610 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d27b4dff9/46272f63fd6646c0962f01ad8e55d839/FLAG1fdc23fe9 [2019-11-06 22:47:38,855 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d27b4dff9/46272f63fd6646c0962f01ad8e55d839 [2019-11-06 22:47:38,866 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 22:47:38,868 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 22:47:38,870 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 22:47:38,871 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 22:47:38,875 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 22:47:38,876 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:47:38" (1/1) ... [2019-11-06 22:47:38,879 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@40852bb4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:47:38, skipping insertion in model container [2019-11-06 22:47:38,880 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:47:38" (1/1) ... [2019-11-06 22:47:38,888 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 22:47:38,959 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 22:47:39,636 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:47:39,649 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 22:47:39,836 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:47:39,858 INFO L192 MainTranslator]: Completed translation [2019-11-06 22:47:39,859 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:47:39 WrapperNode [2019-11-06 22:47:39,859 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 22:47:39,860 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 22:47:39,860 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 22:47:39,860 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 22:47:39,879 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:47:39" (1/1) ... [2019-11-06 22:47:39,880 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:47:39" (1/1) ... [2019-11-06 22:47:39,922 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:47:39" (1/1) ... [2019-11-06 22:47:39,925 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:47:39" (1/1) ... [2019-11-06 22:47:39,985 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:47:39" (1/1) ... [2019-11-06 22:47:39,999 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:47:39" (1/1) ... [2019-11-06 22:47:40,007 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:47:39" (1/1) ... [2019-11-06 22:47:40,019 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 22:47:40,019 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 22:47:40,019 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 22:47:40,020 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 22:47:40,029 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:47:39" (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 22:47:40,111 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 22:47:40,111 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 22:47:40,111 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 22:47:40,111 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 22:47:40,112 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 22:47:40,112 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 22:47:40,112 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 22:47:40,112 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 22:47:40,113 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 22:47:40,113 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 22:47:40,113 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 22:47:41,945 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 22:47:41,945 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 22:47:41,950 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:47:41 BoogieIcfgContainer [2019-11-06 22:47:41,951 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 22:47:41,952 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 22:47:41,953 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 22:47:41,957 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 22:47:41,957 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:47:38" (1/3) ... [2019-11-06 22:47:41,958 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d2c5246 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:47:41, skipping insertion in model container [2019-11-06 22:47:41,958 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:47:39" (2/3) ... [2019-11-06 22:47:41,959 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d2c5246 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:47:41, skipping insertion in model container [2019-11-06 22:47:41,959 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:47:41" (3/3) ... [2019-11-06 22:47:41,967 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem11_label51.c [2019-11-06 22:47:41,980 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 22:47:41,991 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 22:47:42,003 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 22:47:42,045 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 22:47:42,046 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 22:47:42,047 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 22:47:42,047 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 22:47:42,048 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 22:47:42,048 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 22:47:42,048 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 22:47:42,048 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 22:47:42,084 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states. [2019-11-06 22:47:42,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-06 22:47:42,091 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:47:42,092 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:47:42,094 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:47:42,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:47:42,101 INFO L82 PathProgramCache]: Analyzing trace with hash 234227266, now seen corresponding path program 1 times [2019-11-06 22:47:42,112 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:47:42,113 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057918084] [2019-11-06 22:47:42,113 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:47:42,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:47:42,389 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:47:42,390 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057918084] [2019-11-06 22:47:42,390 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:47:42,392 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 22:47:42,394 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473693899] [2019-11-06 22:47:42,399 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 22:47:42,400 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:47:42,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 22:47:42,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:47:42,418 INFO L87 Difference]: Start difference. First operand 292 states. Second operand 4 states. [2019-11-06 22:47:44,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:47:44,582 INFO L93 Difference]: Finished difference Result 975 states and 1750 transitions. [2019-11-06 22:47:44,584 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 22:47:44,585 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2019-11-06 22:47:44,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:47:44,609 INFO L225 Difference]: With dead ends: 975 [2019-11-06 22:47:44,609 INFO L226 Difference]: Without dead ends: 616 [2019-11-06 22:47:44,624 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:47:44,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 616 states. [2019-11-06 22:47:44,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 616 to 422. [2019-11-06 22:47:44,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 422 states. [2019-11-06 22:47:44,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 422 states to 422 states and 607 transitions. [2019-11-06 22:47:44,706 INFO L78 Accepts]: Start accepts. Automaton has 422 states and 607 transitions. Word has length 17 [2019-11-06 22:47:44,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:47:44,706 INFO L462 AbstractCegarLoop]: Abstraction has 422 states and 607 transitions. [2019-11-06 22:47:44,706 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 22:47:44,707 INFO L276 IsEmpty]: Start isEmpty. Operand 422 states and 607 transitions. [2019-11-06 22:47:44,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2019-11-06 22:47:44,710 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:47:44,711 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:47:44,711 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:47:44,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:47:44,712 INFO L82 PathProgramCache]: Analyzing trace with hash -904309470, now seen corresponding path program 1 times [2019-11-06 22:47:44,712 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:47:44,712 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75702898] [2019-11-06 22:47:44,712 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:47:44,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:47:45,022 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:47:45,023 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75702898] [2019-11-06 22:47:45,023 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:47:45,023 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 22:47:45,023 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36499996] [2019-11-06 22:47:45,025 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:47:45,025 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:47:45,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:47:45,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:47:45,026 INFO L87 Difference]: Start difference. First operand 422 states and 607 transitions. Second operand 6 states. [2019-11-06 22:47:46,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:47:46,591 INFO L93 Difference]: Finished difference Result 1241 states and 1811 transitions. [2019-11-06 22:47:46,592 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:47:46,592 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 89 [2019-11-06 22:47:46,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:47:46,599 INFO L225 Difference]: With dead ends: 1241 [2019-11-06 22:47:46,600 INFO L226 Difference]: Without dead ends: 825 [2019-11-06 22:47:46,602 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-11-06 22:47:46,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 825 states. [2019-11-06 22:47:46,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 825 to 814. [2019-11-06 22:47:46,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 814 states. [2019-11-06 22:47:46,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 814 states to 814 states and 1163 transitions. [2019-11-06 22:47:46,653 INFO L78 Accepts]: Start accepts. Automaton has 814 states and 1163 transitions. Word has length 89 [2019-11-06 22:47:46,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:47:46,654 INFO L462 AbstractCegarLoop]: Abstraction has 814 states and 1163 transitions. [2019-11-06 22:47:46,654 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 22:47:46,654 INFO L276 IsEmpty]: Start isEmpty. Operand 814 states and 1163 transitions. [2019-11-06 22:47:46,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2019-11-06 22:47:46,657 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:47:46,657 INFO L410 BasicCegarLoop]: trace histogram [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] [2019-11-06 22:47:46,658 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:47:46,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:47:46,658 INFO L82 PathProgramCache]: Analyzing trace with hash 1264359761, now seen corresponding path program 1 times [2019-11-06 22:47:46,658 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:47:46,659 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872440563] [2019-11-06 22:47:46,659 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:47:46,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:47:46,769 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:47:46,770 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872440563] [2019-11-06 22:47:46,770 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:47:46,770 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 22:47:46,771 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381266070] [2019-11-06 22:47:46,771 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 22:47:46,772 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:47:46,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 22:47:46,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:47:46,772 INFO L87 Difference]: Start difference. First operand 814 states and 1163 transitions. Second operand 4 states. [2019-11-06 22:47:48,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:47:48,456 INFO L93 Difference]: Finished difference Result 2405 states and 3484 transitions. [2019-11-06 22:47:48,456 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 22:47:48,457 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 90 [2019-11-06 22:47:48,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:47:48,466 INFO L225 Difference]: With dead ends: 2405 [2019-11-06 22:47:48,467 INFO L226 Difference]: Without dead ends: 1597 [2019-11-06 22:47:48,469 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:47:48,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1597 states. [2019-11-06 22:47:48,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1597 to 1394. [2019-11-06 22:47:48,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1394 states. [2019-11-06 22:47:48,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1394 states to 1394 states and 1952 transitions. [2019-11-06 22:47:48,520 INFO L78 Accepts]: Start accepts. Automaton has 1394 states and 1952 transitions. Word has length 90 [2019-11-06 22:47:48,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:47:48,521 INFO L462 AbstractCegarLoop]: Abstraction has 1394 states and 1952 transitions. [2019-11-06 22:47:48,521 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 22:47:48,522 INFO L276 IsEmpty]: Start isEmpty. Operand 1394 states and 1952 transitions. [2019-11-06 22:47:48,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2019-11-06 22:47:48,525 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:47:48,525 INFO L410 BasicCegarLoop]: trace histogram [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] [2019-11-06 22:47:48,525 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:47:48,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:47:48,526 INFO L82 PathProgramCache]: Analyzing trace with hash 1508869126, now seen corresponding path program 1 times [2019-11-06 22:47:48,526 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:47:48,526 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936700774] [2019-11-06 22:47:48,527 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:47:48,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:47:48,610 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:47:48,611 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936700774] [2019-11-06 22:47:48,611 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:47:48,611 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-06 22:47:48,612 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645474259] [2019-11-06 22:47:48,612 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 22:47:48,613 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:47:48,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 22:47:48,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 22:47:48,613 INFO L87 Difference]: Start difference. First operand 1394 states and 1952 transitions. Second operand 3 states. [2019-11-06 22:47:49,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:47:49,675 INFO L93 Difference]: Finished difference Result 3547 states and 5155 transitions. [2019-11-06 22:47:49,675 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 22:47:49,675 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 91 [2019-11-06 22:47:49,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:47:49,688 INFO L225 Difference]: With dead ends: 3547 [2019-11-06 22:47:49,688 INFO L226 Difference]: Without dead ends: 2159 [2019-11-06 22:47:49,692 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 22:47:49,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2159 states. [2019-11-06 22:47:49,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2159 to 2159. [2019-11-06 22:47:49,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2159 states. [2019-11-06 22:47:49,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2159 states to 2159 states and 3043 transitions. [2019-11-06 22:47:49,764 INFO L78 Accepts]: Start accepts. Automaton has 2159 states and 3043 transitions. Word has length 91 [2019-11-06 22:47:49,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:47:49,764 INFO L462 AbstractCegarLoop]: Abstraction has 2159 states and 3043 transitions. [2019-11-06 22:47:49,765 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 22:47:49,765 INFO L276 IsEmpty]: Start isEmpty. Operand 2159 states and 3043 transitions. [2019-11-06 22:47:49,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2019-11-06 22:47:49,776 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:47:49,777 INFO L410 BasicCegarLoop]: trace histogram [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] [2019-11-06 22:47:49,777 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:47:49,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:47:49,778 INFO L82 PathProgramCache]: Analyzing trace with hash -727591200, now seen corresponding path program 1 times [2019-11-06 22:47:49,778 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:47:49,779 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17980500] [2019-11-06 22:47:49,779 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:47:49,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:47:50,097 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:47:50,098 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17980500] [2019-11-06 22:47:50,098 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:47:50,098 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 22:47:50,099 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915216682] [2019-11-06 22:47:50,099 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:47:50,100 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:47:50,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:47:50,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:47:50,100 INFO L87 Difference]: Start difference. First operand 2159 states and 3043 transitions. Second operand 6 states. [2019-11-06 22:47:51,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:47:51,830 INFO L93 Difference]: Finished difference Result 5916 states and 8671 transitions. [2019-11-06 22:47:51,831 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-06 22:47:51,832 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 160 [2019-11-06 22:47:51,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:47:51,856 INFO L225 Difference]: With dead ends: 5916 [2019-11-06 22:47:51,856 INFO L226 Difference]: Without dead ends: 3763 [2019-11-06 22:47:51,864 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2019-11-06 22:47:51,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3763 states. [2019-11-06 22:47:51,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3763 to 3561. [2019-11-06 22:47:51,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3561 states. [2019-11-06 22:47:52,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3561 states to 3561 states and 4916 transitions. [2019-11-06 22:47:52,028 INFO L78 Accepts]: Start accepts. Automaton has 3561 states and 4916 transitions. Word has length 160 [2019-11-06 22:47:52,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:47:52,029 INFO L462 AbstractCegarLoop]: Abstraction has 3561 states and 4916 transitions. [2019-11-06 22:47:52,029 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 22:47:52,029 INFO L276 IsEmpty]: Start isEmpty. Operand 3561 states and 4916 transitions. [2019-11-06 22:47:52,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2019-11-06 22:47:52,038 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:47:52,039 INFO L410 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:47:52,040 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:47:52,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:47:52,040 INFO L82 PathProgramCache]: Analyzing trace with hash 1639919989, now seen corresponding path program 1 times [2019-11-06 22:47:52,040 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:47:52,041 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976248059] [2019-11-06 22:47:52,041 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:47:52,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:47:52,230 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 91 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:47:52,230 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976248059] [2019-11-06 22:47:52,230 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636844264] [2019-11-06 22:47:52,231 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:47:52,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:47:52,338 INFO L256 TraceCheckSpWp]: Trace formula consists of 386 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 22:47:52,349 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:47:52,421 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2019-11-06 22:47:52,422 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:47:52,497 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2019-11-06 22:47:52,498 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-06 22:47:52,498 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6] total 7 [2019-11-06 22:47:52,499 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093584296] [2019-11-06 22:47:52,499 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 22:47:52,500 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:47:52,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 22:47:52,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-11-06 22:47:52,500 INFO L87 Difference]: Start difference. First operand 3561 states and 4916 transitions. Second operand 3 states. [2019-11-06 22:47:53,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:47:53,797 INFO L93 Difference]: Finished difference Result 9593 states and 13716 transitions. [2019-11-06 22:47:53,798 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 22:47:53,798 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 180 [2019-11-06 22:47:53,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:47:53,842 INFO L225 Difference]: With dead ends: 9593 [2019-11-06 22:47:53,842 INFO L226 Difference]: Without dead ends: 6038 [2019-11-06 22:47:53,859 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 365 GetRequests, 359 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-11-06 22:47:53,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6038 states. [2019-11-06 22:47:54,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6038 to 5470. [2019-11-06 22:47:54,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5470 states. [2019-11-06 22:47:54,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5470 states to 5470 states and 7617 transitions. [2019-11-06 22:47:54,093 INFO L78 Accepts]: Start accepts. Automaton has 5470 states and 7617 transitions. Word has length 180 [2019-11-06 22:47:54,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:47:54,100 INFO L462 AbstractCegarLoop]: Abstraction has 5470 states and 7617 transitions. [2019-11-06 22:47:54,100 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 22:47:54,101 INFO L276 IsEmpty]: Start isEmpty. Operand 5470 states and 7617 transitions. [2019-11-06 22:47:54,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2019-11-06 22:47:54,109 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:47:54,109 INFO L410 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:47:54,315 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:47:54,316 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:47:54,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:47:54,316 INFO L82 PathProgramCache]: Analyzing trace with hash 185402300, now seen corresponding path program 1 times [2019-11-06 22:47:54,317 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:47:54,317 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426429208] [2019-11-06 22:47:54,317 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:47:54,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:47:54,569 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 91 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:47:54,570 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426429208] [2019-11-06 22:47:54,570 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1346817038] [2019-11-06 22:47:54,570 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:47:54,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:47:54,684 INFO L256 TraceCheckSpWp]: Trace formula consists of 404 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-06 22:47:54,698 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:47:54,805 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 91 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:47:54,805 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:47:54,919 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 91 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:47:54,919 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [1830304736] [2019-11-06 22:47:54,926 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 197 [2019-11-06 22:47:54,982 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-11-06 22:47:54,983 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2)