/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/Problem14_label32.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 22:51:00,661 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 22:51:00,663 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 22:51:00,675 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-06 22:51:00,685 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 22:51:00,686 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 22:51:00,686 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 22:51:00,688 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 22:51:00,688 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 22:51:00,689 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 22:51:00,691 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 22:51:00,693 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 22:51:00,694 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 22:51:00,695 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 22:51:00,696 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 22:51:00,697 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 22:51:00,699 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 22:51:00,707 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 22:51:00,708 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 22:51:00,709 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 22:51:00,709 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 22:51:00,723 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 22:51:00,724 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 22:51:00,725 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 22:51:00,725 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 22:51:00,725 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 22:51:00,726 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 22:51:00,726 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 22:51:00,726 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 22:51:00,726 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 22:51:00,726 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 22:51:00,727 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 22:51:00,727 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 22:51:00,727 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 22:51:00,727 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 22:51:00,727 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 22:51:00,728 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 22:51:00,728 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 22:51:00,728 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 22:51:00,728 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 22:51:00,728 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 22:51:00,729 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 22:51:00,729 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 22:51:00,729 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 22:51:00,729 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 22:51:00,730 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 22:51:00,730 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 22:51:00,730 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 22:51:00,730 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 22:51:00,730 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 22:51:01,009 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 22:51:01,031 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 22:51:01,035 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 22:51:01,036 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 22:51:01,037 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 22:51:01,037 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label32.c [2019-11-06 22:51:01,123 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2c0789a80/49a9d28316df4e49ae9273b94a1b3edb/FLAG17708d98d [2019-11-06 22:51:01,729 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 22:51:01,733 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem14_label32.c [2019-11-06 22:51:01,760 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2c0789a80/49a9d28316df4e49ae9273b94a1b3edb/FLAG17708d98d [2019-11-06 22:51:01,984 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2c0789a80/49a9d28316df4e49ae9273b94a1b3edb [2019-11-06 22:51:01,992 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 22:51:01,994 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 22:51:01,998 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 22:51:01,998 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 22:51:02,002 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 22:51:02,003 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:51:01" (1/1) ... [2019-11-06 22:51:02,006 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@748fb0ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:51:02, skipping insertion in model container [2019-11-06 22:51:02,006 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:51:01" (1/1) ... [2019-11-06 22:51:02,013 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 22:51:02,073 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 22:51:02,883 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:51:02,896 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 22:51:03,028 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:51:03,044 INFO L192 MainTranslator]: Completed translation [2019-11-06 22:51:03,044 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:51:03 WrapperNode [2019-11-06 22:51:03,044 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 22:51:03,045 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 22:51:03,045 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 22:51:03,046 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 22:51:03,061 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:51:03" (1/1) ... [2019-11-06 22:51:03,061 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:51:03" (1/1) ... [2019-11-06 22:51:03,090 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:51:03" (1/1) ... [2019-11-06 22:51:03,094 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:51:03" (1/1) ... [2019-11-06 22:51:03,146 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:51:03" (1/1) ... [2019-11-06 22:51:03,163 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:51:03" (1/1) ... [2019-11-06 22:51:03,169 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:51:03" (1/1) ... [2019-11-06 22:51:03,176 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 22:51:03,177 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 22:51:03,177 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 22:51:03,178 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 22:51:03,179 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:51:03" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 22:51:03,245 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 22:51:03,245 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 22:51:03,246 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 22:51:03,246 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 22:51:03,246 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 22:51:03,246 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 22:51:03,247 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 22:51:03,247 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 22:51:03,247 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 22:51:03,247 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 22:51:03,247 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 22:51:04,850 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 22:51:04,850 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 22:51:04,852 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:51:04 BoogieIcfgContainer [2019-11-06 22:51:04,852 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 22:51:04,853 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 22:51:04,853 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 22:51:04,856 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 22:51:04,857 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:51:01" (1/3) ... [2019-11-06 22:51:04,857 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35d453fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:51:04, skipping insertion in model container [2019-11-06 22:51:04,858 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:51:03" (2/3) ... [2019-11-06 22:51:04,859 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35d453fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:51:04, skipping insertion in model container [2019-11-06 22:51:04,859 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:51:04" (3/3) ... [2019-11-06 22:51:04,861 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem14_label32.c [2019-11-06 22:51:04,870 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 22:51:04,878 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 22:51:04,890 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 22:51:04,917 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 22:51:04,917 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 22:51:04,917 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 22:51:04,917 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 22:51:04,917 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 22:51:04,917 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 22:51:04,918 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 22:51:04,918 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 22:51:04,940 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states. [2019-11-06 22:51:04,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2019-11-06 22:51:04,949 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:51:04,950 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 22:51:04,952 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:51:04,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:51:04,958 INFO L82 PathProgramCache]: Analyzing trace with hash -1416126934, now seen corresponding path program 1 times [2019-11-06 22:51:04,967 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:51:04,968 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498285060] [2019-11-06 22:51:04,968 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:51:05,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:51:05,285 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 22:51:05,286 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498285060] [2019-11-06 22:51:05,287 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:51:05,287 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 22:51:05,290 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499121727] [2019-11-06 22:51:05,298 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 22:51:05,300 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:51:05,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 22:51:05,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:51:05,321 INFO L87 Difference]: Start difference. First operand 254 states. Second operand 4 states. [2019-11-06 22:51:07,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:51:07,181 INFO L93 Difference]: Finished difference Result 890 states and 1607 transitions. [2019-11-06 22:51:07,183 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 22:51:07,184 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 61 [2019-11-06 22:51:07,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:51:07,209 INFO L225 Difference]: With dead ends: 890 [2019-11-06 22:51:07,209 INFO L226 Difference]: Without dead ends: 554 [2019-11-06 22:51:07,218 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 22:51:07,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2019-11-06 22:51:07,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 554. [2019-11-06 22:51:07,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 554 states. [2019-11-06 22:51:07,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 554 states to 554 states and 776 transitions. [2019-11-06 22:51:07,319 INFO L78 Accepts]: Start accepts. Automaton has 554 states and 776 transitions. Word has length 61 [2019-11-06 22:51:07,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:51:07,320 INFO L462 AbstractCegarLoop]: Abstraction has 554 states and 776 transitions. [2019-11-06 22:51:07,320 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 22:51:07,321 INFO L276 IsEmpty]: Start isEmpty. Operand 554 states and 776 transitions. [2019-11-06 22:51:07,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2019-11-06 22:51:07,337 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:51:07,338 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] [2019-11-06 22:51:07,338 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:51:07,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:51:07,339 INFO L82 PathProgramCache]: Analyzing trace with hash 1588363546, now seen corresponding path program 1 times [2019-11-06 22:51:07,339 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:51:07,339 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282622229] [2019-11-06 22:51:07,339 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:51:07,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:51:07,617 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 22:51:07,618 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282622229] [2019-11-06 22:51:07,618 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:51:07,618 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 22:51:07,618 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331642742] [2019-11-06 22:51:07,626 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 22:51:07,626 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:51:07,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 22:51:07,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:51:07,627 INFO L87 Difference]: Start difference. First operand 554 states and 776 transitions. Second operand 4 states. [2019-11-06 22:51:09,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:51:09,319 INFO L93 Difference]: Finished difference Result 2012 states and 2904 transitions. [2019-11-06 22:51:09,320 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 22:51:09,320 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 173 [2019-11-06 22:51:09,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:51:09,330 INFO L225 Difference]: With dead ends: 2012 [2019-11-06 22:51:09,331 INFO L226 Difference]: Without dead ends: 1464 [2019-11-06 22:51:09,333 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 22:51:09,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1464 states. [2019-11-06 22:51:09,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1464 to 1282. [2019-11-06 22:51:09,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1282 states. [2019-11-06 22:51:09,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1282 states to 1282 states and 1767 transitions. [2019-11-06 22:51:09,387 INFO L78 Accepts]: Start accepts. Automaton has 1282 states and 1767 transitions. Word has length 173 [2019-11-06 22:51:09,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:51:09,388 INFO L462 AbstractCegarLoop]: Abstraction has 1282 states and 1767 transitions. [2019-11-06 22:51:09,388 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 22:51:09,388 INFO L276 IsEmpty]: Start isEmpty. Operand 1282 states and 1767 transitions. [2019-11-06 22:51:09,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2019-11-06 22:51:09,396 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:51:09,397 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, 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] [2019-11-06 22:51:09,397 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:51:09,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:51:09,397 INFO L82 PathProgramCache]: Analyzing trace with hash -1017976546, now seen corresponding path program 1 times [2019-11-06 22:51:09,398 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:51:09,398 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83607434] [2019-11-06 22:51:09,398 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:51:09,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:51:09,722 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 129 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:51:09,723 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83607434] [2019-11-06 22:51:09,723 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341980812] [2019-11-06 22:51:09,723 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 22:51:09,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:51:09,820 INFO L256 TraceCheckSpWp]: Trace formula consists of 429 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 22:51:09,833 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:51:09,956 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 111 proven. 0 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2019-11-06 22:51:09,957 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:51:10,084 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 111 proven. 0 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2019-11-06 22:51:10,085 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-06 22:51:10,085 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [9] total 11 [2019-11-06 22:51:10,085 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216232282] [2019-11-06 22:51:10,086 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 22:51:10,087 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:51:10,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 22:51:10,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2019-11-06 22:51:10,087 INFO L87 Difference]: Start difference. First operand 1282 states and 1767 transitions. Second operand 4 states. [2019-11-06 22:51:11,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:51:11,506 INFO L93 Difference]: Finished difference Result 4560 states and 6571 transitions. [2019-11-06 22:51:11,508 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 22:51:11,508 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 247 [2019-11-06 22:51:11,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:51:11,527 INFO L225 Difference]: With dead ends: 4560 [2019-11-06 22:51:11,527 INFO L226 Difference]: Without dead ends: 3284 [2019-11-06 22:51:11,531 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 505 GetRequests, 496 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2019-11-06 22:51:11,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3284 states. [2019-11-06 22:51:11,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3284 to 3102. [2019-11-06 22:51:11,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3102 states. [2019-11-06 22:51:11,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3102 states to 3102 states and 4211 transitions. [2019-11-06 22:51:11,646 INFO L78 Accepts]: Start accepts. Automaton has 3102 states and 4211 transitions. Word has length 247 [2019-11-06 22:51:11,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:51:11,647 INFO L462 AbstractCegarLoop]: Abstraction has 3102 states and 4211 transitions. [2019-11-06 22:51:11,647 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 22:51:11,647 INFO L276 IsEmpty]: Start isEmpty. Operand 3102 states and 4211 transitions. [2019-11-06 22:51:11,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 316 [2019-11-06 22:51:11,666 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:51:11,667 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-11-06 22:51:11,882 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:51:11,882 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:51:11,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:51:11,883 INFO L82 PathProgramCache]: Analyzing trace with hash 754436966, now seen corresponding path program 1 times [2019-11-06 22:51:11,883 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:51:11,883 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85830886] [2019-11-06 22:51:11,883 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:51:11,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:51:13,090 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 163 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:51:13,091 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85830886] [2019-11-06 22:51:13,091 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657842852] [2019-11-06 22:51:13,091 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 22:51:13,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:51:13,195 INFO L256 TraceCheckSpWp]: Trace formula consists of 497 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-06 22:51:13,203 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:51:13,278 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:51:13,390 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 165 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2019-11-06 22:51:13,390 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:51:13,570 WARN L191 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 35 [2019-11-06 22:51:13,608 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:51:13,610 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:51:13,611 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:51:13,612 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:51:13,638 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:51:13,712 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:51:14,030 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 108 proven. 108 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-06 22:51:14,031 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:51:14,031 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [14, 5] total 19 [2019-11-06 22:51:14,032 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709614003] [2019-11-06 22:51:14,032 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 22:51:14,032 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:51:14,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 22:51:14,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2019-11-06 22:51:14,033 INFO L87 Difference]: Start difference. First operand 3102 states and 4211 transitions. Second operand 5 states. [2019-11-06 22:51:15,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:51:15,428 INFO L93 Difference]: Finished difference Result 6070 states and 8360 transitions. [2019-11-06 22:51:15,429 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-06 22:51:15,429 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 315 [2019-11-06 22:51:15,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:51:15,448 INFO L225 Difference]: With dead ends: 6070 [2019-11-06 22:51:15,449 INFO L226 Difference]: Without dead ends: 3156 [2019-11-06 22:51:15,457 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 648 GetRequests, 627 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2019-11-06 22:51:15,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3156 states. [2019-11-06 22:51:15,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3156 to 2784. [2019-11-06 22:51:15,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2784 states. [2019-11-06 22:51:15,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2784 states to 2784 states and 3781 transitions. [2019-11-06 22:51:15,540 INFO L78 Accepts]: Start accepts. Automaton has 2784 states and 3781 transitions. Word has length 315 [2019-11-06 22:51:15,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:51:15,541 INFO L462 AbstractCegarLoop]: Abstraction has 2784 states and 3781 transitions. [2019-11-06 22:51:15,541 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 22:51:15,541 INFO L276 IsEmpty]: Start isEmpty. Operand 2784 states and 3781 transitions. [2019-11-06 22:51:15,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 386 [2019-11-06 22:51:15,552 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:51:15,553 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:51:15,765 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:51:15,765 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:51:15,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:51:15,766 INFO L82 PathProgramCache]: Analyzing trace with hash -1624153950, now seen corresponding path program 1 times [2019-11-06 22:51:15,766 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:51:15,766 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399341136] [2019-11-06 22:51:15,767 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:51:15,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:51:16,015 INFO L134 CoverageAnalysis]: Checked inductivity of 414 backedges. 162 proven. 132 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2019-11-06 22:51:16,016 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399341136] [2019-11-06 22:51:16,016 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521355926] [2019-11-06 22:51:16,016 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:51:16,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:51:16,139 INFO L256 TraceCheckSpWp]: Trace formula consists of 605 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 22:51:16,146 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:51:16,261 INFO L134 CoverageAnalysis]: Checked inductivity of 414 backedges. 192 proven. 0 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2019-11-06 22:51:16,262 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:51:16,461 INFO L134 CoverageAnalysis]: Checked inductivity of 414 backedges. 162 proven. 132 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2019-11-06 22:51:16,461 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:51:16,462 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 9 [2019-11-06 22:51:16,462 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777628948] [2019-11-06 22:51:16,463 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 22:51:16,463 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:51:16,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 22:51:16,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2019-11-06 22:51:16,464 INFO L87 Difference]: Start difference. First operand 2784 states and 3781 transitions. Second operand 5 states. [2019-11-06 22:51:17,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:51:17,541 INFO L93 Difference]: Finished difference Result 5434 states and 7602 transitions. [2019-11-06 22:51:17,541 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:51:17,541 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 385 [2019-11-06 22:51:17,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:51:17,557 INFO L225 Difference]: With dead ends: 5434 [2019-11-06 22:51:17,558 INFO L226 Difference]: Without dead ends: 2656 [2019-11-06 22:51:17,568 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 778 GetRequests, 764 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2019-11-06 22:51:17,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2656 states. [2019-11-06 22:51:17,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2656 to 2624. [2019-11-06 22:51:17,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2624 states. [2019-11-06 22:51:17,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2624 states to 2624 states and 3337 transitions. [2019-11-06 22:51:17,674 INFO L78 Accepts]: Start accepts. Automaton has 2624 states and 3337 transitions. Word has length 385 [2019-11-06 22:51:17,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:51:17,675 INFO L462 AbstractCegarLoop]: Abstraction has 2624 states and 3337 transitions. [2019-11-06 22:51:17,675 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 22:51:17,675 INFO L276 IsEmpty]: Start isEmpty. Operand 2624 states and 3337 transitions. [2019-11-06 22:51:17,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 400 [2019-11-06 22:51:17,694 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:51:17,694 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:51:17,899 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:51:17,899 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:51:17,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:51:17,900 INFO L82 PathProgramCache]: Analyzing trace with hash 1426525150, now seen corresponding path program 1 times [2019-11-06 22:51:17,900 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:51:17,900 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443998685] [2019-11-06 22:51:17,900 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:51:17,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:51:19,122 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 248 proven. 190 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-06 22:51:19,122 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443998685] [2019-11-06 22:51:19,123 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1330112426] [2019-11-06 22:51:19,123 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:51:19,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:51:19,249 INFO L256 TraceCheckSpWp]: Trace formula consists of 620 conjuncts, 26 conjunts are in the unsatisfiable core [2019-11-06 22:51:19,256 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:51:19,323 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 4 terms [2019-11-06 22:51:19,642 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 334 proven. 53 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2019-11-06 22:51:19,642 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:51:19,706 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 4 terms [2019-11-06 22:51:20,219 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 170 proven. 268 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-06 22:51:20,220 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [927023253] [2019-11-06 22:51:20,225 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 400 [2019-11-06 22:51:20,288 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-11-06 22:51:20,289 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2)