/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/Problem18_label30.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 22:57:45,425 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 22:57:45,428 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 22:57:45,445 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-06 22:57:45,467 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 22:57:45,468 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 22:57:45,469 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 22:57:45,469 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 22:57:45,470 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 22:57:45,471 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 22:57:45,472 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 22:57:45,474 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 22:57:45,475 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 22:57:45,476 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 22:57:45,477 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 22:57:45,478 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 22:57:45,480 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 22:57:45,487 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 22:57:45,488 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 22:57:45,489 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 22:57:45,489 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 22:57:45,505 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 22:57:45,505 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 22:57:45,506 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 22:57:45,507 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 22:57:45,507 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 22:57:45,507 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 22:57:45,507 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 22:57:45,507 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 22:57:45,508 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 22:57:45,508 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 22:57:45,508 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 22:57:45,508 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 22:57:45,508 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 22:57:45,509 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 22:57:45,509 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 22:57:45,509 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 22:57:45,509 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 22:57:45,509 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 22:57:45,510 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 22:57:45,510 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 22:57:45,510 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 22:57:45,510 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 22:57:45,510 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 22:57:45,511 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 22:57:45,511 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 22:57:45,511 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 22:57:45,511 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 22:57:45,511 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 22:57:45,512 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 22:57:45,773 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 22:57:45,785 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 22:57:45,788 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 22:57:45,789 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 22:57:45,790 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 22:57:45,791 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem18_label30.c [2019-11-06 22:57:45,867 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e51fd1f9b/cc780d7919644cf1af7e000c7f05e239/FLAGdc4138f91 [2019-11-06 22:57:46,600 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 22:57:46,601 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem18_label30.c [2019-11-06 22:57:46,630 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e51fd1f9b/cc780d7919644cf1af7e000c7f05e239/FLAGdc4138f91 [2019-11-06 22:57:46,738 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e51fd1f9b/cc780d7919644cf1af7e000c7f05e239 [2019-11-06 22:57:46,749 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 22:57:46,751 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 22:57:46,752 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 22:57:46,753 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 22:57:46,756 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 22:57:46,757 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:57:46" (1/1) ... [2019-11-06 22:57:46,760 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@cc2490f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:57:46, skipping insertion in model container [2019-11-06 22:57:46,761 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:57:46" (1/1) ... [2019-11-06 22:57:46,769 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 22:57:46,895 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 22:57:48,140 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:57:48,151 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 22:57:48,618 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:57:48,649 INFO L192 MainTranslator]: Completed translation [2019-11-06 22:57:48,649 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:57:48 WrapperNode [2019-11-06 22:57:48,650 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 22:57:48,650 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 22:57:48,651 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 22:57:48,651 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 22:57:48,666 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:57:48" (1/1) ... [2019-11-06 22:57:48,666 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:57:48" (1/1) ... [2019-11-06 22:57:48,719 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:57:48" (1/1) ... [2019-11-06 22:57:48,721 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:57:48" (1/1) ... [2019-11-06 22:57:48,865 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:57:48" (1/1) ... [2019-11-06 22:57:48,910 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:57:48" (1/1) ... [2019-11-06 22:57:48,931 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:57:48" (1/1) ... [2019-11-06 22:57:48,953 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 22:57:48,953 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 22:57:48,953 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 22:57:48,953 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 22:57:48,955 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:57:48" (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 22:57:49,024 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 22:57:49,025 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 22:57:49,025 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 22:57:49,026 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-11-06 22:57:49,026 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2019-11-06 22:57:49,026 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 22:57:49,026 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 22:57:49,026 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-11-06 22:57:49,027 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2019-11-06 22:57:49,028 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 22:57:49,028 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 22:57:49,028 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 22:57:49,030 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 22:57:49,031 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 22:57:49,031 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 22:57:52,957 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 22:57:52,957 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 22:57:52,959 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:57:52 BoogieIcfgContainer [2019-11-06 22:57:52,959 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 22:57:53,027 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 22:57:53,027 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 22:57:53,034 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 22:57:53,034 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:57:46" (1/3) ... [2019-11-06 22:57:53,035 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e094799 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:57:53, skipping insertion in model container [2019-11-06 22:57:53,035 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:57:48" (2/3) ... [2019-11-06 22:57:53,036 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e094799 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:57:53, skipping insertion in model container [2019-11-06 22:57:53,037 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:57:52" (3/3) ... [2019-11-06 22:57:53,042 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem18_label30.c [2019-11-06 22:57:53,055 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 22:57:53,065 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 22:57:53,077 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 22:57:53,119 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 22:57:53,119 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 22:57:53,119 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 22:57:53,119 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 22:57:53,119 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 22:57:53,120 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 22:57:53,120 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 22:57:53,120 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 22:57:53,162 INFO L276 IsEmpty]: Start isEmpty. Operand 774 states. [2019-11-06 22:57:53,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2019-11-06 22:57:53,172 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:57:53,173 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] [2019-11-06 22:57:53,176 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:57:53,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:57:53,182 INFO L82 PathProgramCache]: Analyzing trace with hash 2051864770, now seen corresponding path program 1 times [2019-11-06 22:57:53,192 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:57:53,192 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814949972] [2019-11-06 22:57:53,193 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:57:53,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:57:53,539 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 22:57:53,540 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814949972] [2019-11-06 22:57:53,541 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:57:53,541 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 22:57:53,543 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062078902] [2019-11-06 22:57:53,549 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 22:57:53,551 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:57:53,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 22:57:53,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:57:53,569 INFO L87 Difference]: Start difference. First operand 774 states. Second operand 4 states. [2019-11-06 22:58:01,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:58:01,913 INFO L93 Difference]: Finished difference Result 2970 states and 5743 transitions. [2019-11-06 22:58:01,914 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 22:58:01,915 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 49 [2019-11-06 22:58:01,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:58:01,952 INFO L225 Difference]: With dead ends: 2970 [2019-11-06 22:58:01,953 INFO L226 Difference]: Without dead ends: 2114 [2019-11-06 22:58:01,965 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 22:58:01,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2114 states. [2019-11-06 22:58:02,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2114 to 2114. [2019-11-06 22:58:02,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2114 states. [2019-11-06 22:58:02,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2114 states to 2114 states and 3320 transitions. [2019-11-06 22:58:02,139 INFO L78 Accepts]: Start accepts. Automaton has 2114 states and 3320 transitions. Word has length 49 [2019-11-06 22:58:02,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:58:02,140 INFO L462 AbstractCegarLoop]: Abstraction has 2114 states and 3320 transitions. [2019-11-06 22:58:02,140 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 22:58:02,140 INFO L276 IsEmpty]: Start isEmpty. Operand 2114 states and 3320 transitions. [2019-11-06 22:58:02,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2019-11-06 22:58:02,146 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:58:02,146 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:58:02,147 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:58:02,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:58:02,147 INFO L82 PathProgramCache]: Analyzing trace with hash -600771033, now seen corresponding path program 1 times [2019-11-06 22:58:02,148 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:58:02,148 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394151836] [2019-11-06 22:58:02,148 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:58:02,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:58:02,378 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:58:02,379 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394151836] [2019-11-06 22:58:02,379 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:58:02,380 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-06 22:58:02,380 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267269193] [2019-11-06 22:58:02,382 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 22:58:02,382 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:58:02,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 22:58:02,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-06 22:58:02,383 INFO L87 Difference]: Start difference. First operand 2114 states and 3320 transitions. Second operand 5 states. [2019-11-06 22:58:09,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:58:09,116 INFO L93 Difference]: Finished difference Result 6436 states and 10244 transitions. [2019-11-06 22:58:09,117 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:58:09,118 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 118 [2019-11-06 22:58:09,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:58:09,153 INFO L225 Difference]: With dead ends: 6436 [2019-11-06 22:58:09,153 INFO L226 Difference]: Without dead ends: 4328 [2019-11-06 22:58:09,161 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-11-06 22:58:09,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4328 states. [2019-11-06 22:58:09,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4328 to 4296. [2019-11-06 22:58:09,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4296 states. [2019-11-06 22:58:09,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4296 states to 4296 states and 6416 transitions. [2019-11-06 22:58:09,330 INFO L78 Accepts]: Start accepts. Automaton has 4296 states and 6416 transitions. Word has length 118 [2019-11-06 22:58:09,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:58:09,331 INFO L462 AbstractCegarLoop]: Abstraction has 4296 states and 6416 transitions. [2019-11-06 22:58:09,331 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 22:58:09,331 INFO L276 IsEmpty]: Start isEmpty. Operand 4296 states and 6416 transitions. [2019-11-06 22:58:09,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2019-11-06 22:58:09,336 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:58:09,336 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:58:09,336 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:58:09,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:58:09,337 INFO L82 PathProgramCache]: Analyzing trace with hash -549101798, now seen corresponding path program 1 times [2019-11-06 22:58:09,337 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:58:09,337 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431348799] [2019-11-06 22:58:09,338 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:58:09,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:58:09,603 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:58:09,604 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431348799] [2019-11-06 22:58:09,604 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:58:09,604 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 22:58:09,604 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553490909] [2019-11-06 22:58:09,605 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:58:09,605 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:58:09,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:58:09,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:58:09,606 INFO L87 Difference]: Start difference. First operand 4296 states and 6416 transitions. Second operand 6 states. [2019-11-06 22:58:15,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:58:15,404 INFO L93 Difference]: Finished difference Result 10829 states and 16211 transitions. [2019-11-06 22:58:15,406 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:58:15,407 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 145 [2019-11-06 22:58:15,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:58:15,453 INFO L225 Difference]: With dead ends: 10829 [2019-11-06 22:58:15,454 INFO L226 Difference]: Without dead ends: 6539 [2019-11-06 22:58:15,466 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 22:58:15,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6539 states. [2019-11-06 22:58:15,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6539 to 6505. [2019-11-06 22:58:15,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6505 states. [2019-11-06 22:58:15,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6505 states to 6505 states and 8361 transitions. [2019-11-06 22:58:15,655 INFO L78 Accepts]: Start accepts. Automaton has 6505 states and 8361 transitions. Word has length 145 [2019-11-06 22:58:15,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:58:15,655 INFO L462 AbstractCegarLoop]: Abstraction has 6505 states and 8361 transitions. [2019-11-06 22:58:15,655 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 22:58:15,656 INFO L276 IsEmpty]: Start isEmpty. Operand 6505 states and 8361 transitions. [2019-11-06 22:58:15,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2019-11-06 22:58:15,659 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:58:15,660 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:58:15,660 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:58:15,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:58:15,661 INFO L82 PathProgramCache]: Analyzing trace with hash 2053676878, now seen corresponding path program 1 times [2019-11-06 22:58:15,661 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:58:15,661 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443606306] [2019-11-06 22:58:15,661 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:58:15,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:58:15,893 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:58:15,893 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443606306] [2019-11-06 22:58:15,894 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:58:15,894 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 22:58:15,894 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224370098] [2019-11-06 22:58:15,896 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 22:58:15,896 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:58:15,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 22:58:15,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:58:15,897 INFO L87 Difference]: Start difference. First operand 6505 states and 8361 transitions. Second operand 4 states. [2019-11-06 22:58:21,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:58:21,957 INFO L93 Difference]: Finished difference Result 13004 states and 16722 transitions. [2019-11-06 22:58:21,960 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 22:58:21,960 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 155 [2019-11-06 22:58:21,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:58:21,985 INFO L225 Difference]: With dead ends: 13004 [2019-11-06 22:58:21,985 INFO L226 Difference]: Without dead ends: 6505 [2019-11-06 22:58:21,998 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 22:58:22,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6505 states. [2019-11-06 22:58:22,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6505 to 6505. [2019-11-06 22:58:22,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6505 states. [2019-11-06 22:58:22,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6505 states to 6505 states and 7877 transitions. [2019-11-06 22:58:22,123 INFO L78 Accepts]: Start accepts. Automaton has 6505 states and 7877 transitions. Word has length 155 [2019-11-06 22:58:22,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:58:22,124 INFO L462 AbstractCegarLoop]: Abstraction has 6505 states and 7877 transitions. [2019-11-06 22:58:22,124 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 22:58:22,124 INFO L276 IsEmpty]: Start isEmpty. Operand 6505 states and 7877 transitions. [2019-11-06 22:58:22,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2019-11-06 22:58:22,128 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:58:22,128 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, 2, 2, 2, 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] [2019-11-06 22:58:22,128 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:58:22,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:58:22,129 INFO L82 PathProgramCache]: Analyzing trace with hash -1504581861, now seen corresponding path program 1 times [2019-11-06 22:58:22,129 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:58:22,129 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11833545] [2019-11-06 22:58:22,129 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:58:22,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:58:22,292 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 87 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2019-11-06 22:58:22,293 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11833545] [2019-11-06 22:58:22,293 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:58:22,293 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 22:58:22,294 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047417650] [2019-11-06 22:58:22,295 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 22:58:22,295 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:58:22,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 22:58:22,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:58:22,296 INFO L87 Difference]: Start difference. First operand 6505 states and 7877 transitions. Second operand 4 states.