/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/Problem16_label11.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 22:53:58,980 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 22:53:58,982 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 22:53:58,994 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-06 22:53:59,003 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 22:53:59,004 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 22:53:59,005 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 22:53:59,006 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 22:53:59,007 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 22:53:59,008 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 22:53:59,010 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 22:53:59,012 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 22:53:59,013 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 22:53:59,014 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 22:53:59,015 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 22:53:59,016 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 22:53:59,018 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 22:53:59,026 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 22:53:59,027 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 22:53:59,028 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 22:53:59,029 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 22:53:59,043 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 22:53:59,043 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 22:53:59,044 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 22:53:59,044 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 22:53:59,044 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 22:53:59,045 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 22:53:59,045 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 22:53:59,045 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 22:53:59,045 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 22:53:59,046 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 22:53:59,046 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 22:53:59,046 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 22:53:59,046 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 22:53:59,046 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 22:53:59,047 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 22:53:59,047 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 22:53:59,047 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 22:53:59,047 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 22:53:59,047 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 22:53:59,048 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 22:53:59,048 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 22:53:59,048 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 22:53:59,048 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 22:53:59,048 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 22:53:59,049 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 22:53:59,049 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 22:53:59,049 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 22:53:59,049 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 22:53:59,049 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 22:53:59,326 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 22:53:59,345 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 22:53:59,349 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 22:53:59,350 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 22:53:59,351 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 22:53:59,351 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem16_label11.c [2019-11-06 22:53:59,410 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/92d41f9e2/3aa8c179187b432c957735964014e8e5/FLAG1e98102d8 [2019-11-06 22:54:00,066 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 22:54:00,067 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem16_label11.c [2019-11-06 22:54:00,083 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/92d41f9e2/3aa8c179187b432c957735964014e8e5/FLAG1e98102d8 [2019-11-06 22:54:00,247 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/92d41f9e2/3aa8c179187b432c957735964014e8e5 [2019-11-06 22:54:00,258 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 22:54:00,260 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 22:54:00,261 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 22:54:00,261 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 22:54:00,266 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 22:54:00,267 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:54:00" (1/1) ... [2019-11-06 22:54:00,270 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6ec017b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:54:00, skipping insertion in model container [2019-11-06 22:54:00,270 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:54:00" (1/1) ... [2019-11-06 22:54:00,278 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 22:54:00,346 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 22:54:01,315 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:54:01,326 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 22:54:01,597 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:54:01,617 INFO L192 MainTranslator]: Completed translation [2019-11-06 22:54:01,617 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:54:01 WrapperNode [2019-11-06 22:54:01,618 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 22:54:01,619 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 22:54:01,619 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 22:54:01,619 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 22:54:01,634 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:54:01" (1/1) ... [2019-11-06 22:54:01,634 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:54:01" (1/1) ... [2019-11-06 22:54:01,679 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:54:01" (1/1) ... [2019-11-06 22:54:01,679 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:54:01" (1/1) ... [2019-11-06 22:54:01,738 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:54:01" (1/1) ... [2019-11-06 22:54:01,768 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:54:01" (1/1) ... [2019-11-06 22:54:01,784 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:54:01" (1/1) ... [2019-11-06 22:54:01,795 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 22:54:01,795 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 22:54:01,795 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 22:54:01,796 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 22:54:01,797 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:54:01" (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 22:54:01,860 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 22:54:01,860 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 22:54:01,861 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 22:54:01,861 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-11-06 22:54:01,861 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 22:54:01,861 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 22:54:01,862 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-11-06 22:54:01,862 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 22:54:01,862 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 22:54:01,862 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 22:54:01,862 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 22:54:01,862 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 22:54:01,863 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 22:54:04,140 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 22:54:04,140 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 22:54:04,142 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:54:04 BoogieIcfgContainer [2019-11-06 22:54:04,147 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 22:54:04,151 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 22:54:04,151 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 22:54:04,155 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 22:54:04,155 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:54:00" (1/3) ... [2019-11-06 22:54:04,156 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e8f944f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:54:04, skipping insertion in model container [2019-11-06 22:54:04,157 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:54:01" (2/3) ... [2019-11-06 22:54:04,158 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e8f944f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:54:04, skipping insertion in model container [2019-11-06 22:54:04,158 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:54:04" (3/3) ... [2019-11-06 22:54:04,163 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem16_label11.c [2019-11-06 22:54:04,185 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 22:54:04,200 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 22:54:04,214 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 22:54:04,267 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 22:54:04,267 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 22:54:04,267 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 22:54:04,268 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 22:54:04,268 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 22:54:04,268 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 22:54:04,268 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 22:54:04,268 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 22:54:04,317 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states. [2019-11-06 22:54:04,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2019-11-06 22:54:04,329 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:54:04,330 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:54:04,331 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:54:04,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:54:04,340 INFO L82 PathProgramCache]: Analyzing trace with hash -1003051062, now seen corresponding path program 1 times [2019-11-06 22:54:04,355 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:54:04,356 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588579404] [2019-11-06 22:54:04,357 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:54:04,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:54:04,850 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 22:54:04,851 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588579404] [2019-11-06 22:54:04,852 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:54:04,852 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-06 22:54:04,854 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625740801] [2019-11-06 22:54:04,859 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 22:54:04,860 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:54:04,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 22:54:04,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 22:54:04,878 INFO L87 Difference]: Start difference. First operand 409 states. Second operand 3 states. [2019-11-06 22:54:07,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:54:07,229 INFO L93 Difference]: Finished difference Result 1153 states and 2141 transitions. [2019-11-06 22:54:07,230 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 22:54:07,231 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 61 [2019-11-06 22:54:07,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:54:07,254 INFO L225 Difference]: With dead ends: 1153 [2019-11-06 22:54:07,254 INFO L226 Difference]: Without dead ends: 682 [2019-11-06 22:54:07,265 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 22:54:07,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 682 states. [2019-11-06 22:54:07,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 682 to 682. [2019-11-06 22:54:07,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 682 states. [2019-11-06 22:54:07,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 682 states to 682 states and 1184 transitions. [2019-11-06 22:54:07,364 INFO L78 Accepts]: Start accepts. Automaton has 682 states and 1184 transitions. Word has length 61 [2019-11-06 22:54:07,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:54:07,365 INFO L462 AbstractCegarLoop]: Abstraction has 682 states and 1184 transitions. [2019-11-06 22:54:07,365 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 22:54:07,365 INFO L276 IsEmpty]: Start isEmpty. Operand 682 states and 1184 transitions. [2019-11-06 22:54:07,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2019-11-06 22:54:07,373 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:54:07,373 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 22:54:07,374 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:54:07,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:54:07,374 INFO L82 PathProgramCache]: Analyzing trace with hash 1399533719, now seen corresponding path program 1 times [2019-11-06 22:54:07,375 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:54:07,375 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708013679] [2019-11-06 22:54:07,375 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:54:07,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:54:07,631 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:54:07,632 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708013679] [2019-11-06 22:54:07,632 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:54:07,632 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-06 22:54:07,633 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437296424] [2019-11-06 22:54:07,634 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 22:54:07,635 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:54:07,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 22:54:07,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-06 22:54:07,635 INFO L87 Difference]: Start difference. First operand 682 states and 1184 transitions. Second operand 5 states. [2019-11-06 22:54:10,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:54:10,527 INFO L93 Difference]: Finished difference Result 2066 states and 3624 transitions. [2019-11-06 22:54:10,527 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:54:10,528 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 130 [2019-11-06 22:54:10,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:54:10,538 INFO L225 Difference]: With dead ends: 2066 [2019-11-06 22:54:10,539 INFO L226 Difference]: Without dead ends: 1390 [2019-11-06 22:54:10,542 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-11-06 22:54:10,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1390 states. [2019-11-06 22:54:10,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1390 to 1372. [2019-11-06 22:54:10,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1372 states. [2019-11-06 22:54:10,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1372 states to 1372 states and 2268 transitions. [2019-11-06 22:54:10,616 INFO L78 Accepts]: Start accepts. Automaton has 1372 states and 2268 transitions. Word has length 130 [2019-11-06 22:54:10,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:54:10,619 INFO L462 AbstractCegarLoop]: Abstraction has 1372 states and 2268 transitions. [2019-11-06 22:54:10,619 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 22:54:10,619 INFO L276 IsEmpty]: Start isEmpty. Operand 1372 states and 2268 transitions. [2019-11-06 22:54:10,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2019-11-06 22:54:10,626 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:54:10,627 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:54:10,627 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:54:10,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:54:10,627 INFO L82 PathProgramCache]: Analyzing trace with hash -32887422, now seen corresponding path program 1 times [2019-11-06 22:54:10,628 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:54:10,629 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024519711] [2019-11-06 22:54:10,629 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:54:10,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:54:10,928 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:54:10,929 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024519711] [2019-11-06 22:54:10,929 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:54:10,929 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 22:54:10,930 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127373575] [2019-11-06 22:54:10,930 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:54:10,930 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:54:10,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:54:10,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:54:10,931 INFO L87 Difference]: Start difference. First operand 1372 states and 2268 transitions. Second operand 6 states. [2019-11-06 22:54:13,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:54:13,622 INFO L93 Difference]: Finished difference Result 3472 states and 5791 transitions. [2019-11-06 22:54:13,623 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:54:13,623 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 159 [2019-11-06 22:54:13,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:54:13,644 INFO L225 Difference]: With dead ends: 3472 [2019-11-06 22:54:13,644 INFO L226 Difference]: Without dead ends: 2106 [2019-11-06 22:54:13,648 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 22:54:13,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2106 states. [2019-11-06 22:54:13,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2106 to 2081. [2019-11-06 22:54:13,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2081 states. [2019-11-06 22:54:13,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2081 states to 2081 states and 3263 transitions. [2019-11-06 22:54:13,717 INFO L78 Accepts]: Start accepts. Automaton has 2081 states and 3263 transitions. Word has length 159 [2019-11-06 22:54:13,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:54:13,718 INFO L462 AbstractCegarLoop]: Abstraction has 2081 states and 3263 transitions. [2019-11-06 22:54:13,718 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 22:54:13,719 INFO L276 IsEmpty]: Start isEmpty. Operand 2081 states and 3263 transitions. [2019-11-06 22:54:13,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2019-11-06 22:54:13,722 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:54:13,722 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:54:13,722 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:54:13,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:54:13,723 INFO L82 PathProgramCache]: Analyzing trace with hash -909637690, now seen corresponding path program 1 times [2019-11-06 22:54:13,723 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:54:13,723 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310158635] [2019-11-06 22:54:13,724 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:54:13,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:54:13,879 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:54:13,880 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310158635] [2019-11-06 22:54:13,880 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:54:13,880 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 22:54:13,881 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839708508] [2019-11-06 22:54:13,881 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:54:13,882 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:54:13,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:54:13,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:54:13,883 INFO L87 Difference]: Start difference. First operand 2081 states and 3263 transitions. Second operand 6 states. [2019-11-06 22:54:16,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:54:16,311 INFO L93 Difference]: Finished difference Result 5241 states and 8253 transitions. [2019-11-06 22:54:16,313 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:54:16,313 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 177 [2019-11-06 22:54:16,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:54:16,330 INFO L225 Difference]: With dead ends: 5241 [2019-11-06 22:54:16,330 INFO L226 Difference]: Without dead ends: 3166 [2019-11-06 22:54:16,335 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 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 22:54:16,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3166 states. [2019-11-06 22:54:16,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3166 to 3140. [2019-11-06 22:54:16,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3140 states. [2019-11-06 22:54:16,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3140 states to 3140 states and 4128 transitions. [2019-11-06 22:54:16,414 INFO L78 Accepts]: Start accepts. Automaton has 3140 states and 4128 transitions. Word has length 177 [2019-11-06 22:54:16,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:54:16,414 INFO L462 AbstractCegarLoop]: Abstraction has 3140 states and 4128 transitions. [2019-11-06 22:54:16,414 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 22:54:16,415 INFO L276 IsEmpty]: Start isEmpty. Operand 3140 states and 4128 transitions. [2019-11-06 22:54:16,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2019-11-06 22:54:16,419 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:54:16,419 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:54:16,419 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:54:16,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:54:16,420 INFO L82 PathProgramCache]: Analyzing trace with hash -81123022, now seen corresponding path program 1 times [2019-11-06 22:54:16,420 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:54:16,420 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995584568] [2019-11-06 22:54:16,420 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:54:16,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:54:16,629 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 120 proven. 53 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-06 22:54:16,629 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995584568] [2019-11-06 22:54:16,629 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [933605306] [2019-11-06 22:54:16,630 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 22:54:16,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:54:16,761 INFO L256 TraceCheckSpWp]: Trace formula consists of 440 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 22:54:16,781 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:54:16,972 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 111 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2019-11-06 22:54:16,973 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:54:17,091 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 111 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2019-11-06 22:54:17,091 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-06 22:54:17,092 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5] total 7 [2019-11-06 22:54:17,092 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253048587] [2019-11-06 22:54:17,094 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 22:54:17,094 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:54:17,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 22:54:17,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-11-06 22:54:17,095 INFO L87 Difference]: Start difference. First operand 3140 states and 4128 transitions. Second operand 4 states. [2019-11-06 22:54:22,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:54:22,368 INFO L93 Difference]: Finished difference Result 8317 states and 11073 transitions. [2019-11-06 22:54:22,374 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 22:54:22,374 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 259 [2019-11-06 22:54:22,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:54:22,396 INFO L225 Difference]: With dead ends: 8317 [2019-11-06 22:54:22,396 INFO L226 Difference]: Without dead ends: 5183 [2019-11-06 22:54:22,404 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 524 GetRequests, 519 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-11-06 22:54:22,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5183 states. [2019-11-06 22:54:22,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5183 to 4842. [2019-11-06 22:54:22,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4842 states. [2019-11-06 22:54:22,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4842 states to 4842 states and 6246 transitions. [2019-11-06 22:54:22,532 INFO L78 Accepts]: Start accepts. Automaton has 4842 states and 6246 transitions. Word has length 259 [2019-11-06 22:54:22,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:54:22,533 INFO L462 AbstractCegarLoop]: Abstraction has 4842 states and 6246 transitions. [2019-11-06 22:54:22,533 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 22:54:22,534 INFO L276 IsEmpty]: Start isEmpty. Operand 4842 states and 6246 transitions. [2019-11-06 22:54:22,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 504 [2019-11-06 22:54:22,549 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:54:22,550 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:54:22,757 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:54:22,758 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:54:22,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:54:22,759 INFO L82 PathProgramCache]: Analyzing trace with hash 479925678, now seen corresponding path program 1 times [2019-11-06 22:54:22,759 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:54:22,759 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308923281] [2019-11-06 22:54:22,759 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:54:22,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:54:23,394 INFO L134 CoverageAnalysis]: Checked inductivity of 521 backedges. 279 proven. 115 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2019-11-06 22:54:23,394 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308923281] [2019-11-06 22:54:23,395 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [207668241] [2019-11-06 22:54:23,395 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 22:54:23,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:54:23,553 INFO L256 TraceCheckSpWp]: Trace formula consists of 734 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 22:54:23,562 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:54:23,816 INFO L134 CoverageAnalysis]: Checked inductivity of 521 backedges. 464 proven. 2 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2019-11-06 22:54:23,817 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:54:24,142 INFO L134 CoverageAnalysis]: Checked inductivity of 521 backedges. 279 proven. 115 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2019-11-06 22:54:24,143 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [1630980421] [2019-11-06 22:54:24,148 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 504 [2019-11-06 22:54:24,210 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-11-06 22:54:24,211 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2)