/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_label08.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 22:50:05,766 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 22:50:05,768 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 22:50:05,780 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-06 22:50:05,780 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-06 22:50:05,782 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-06 22:50:05,783 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-06 22:50:05,785 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-06 22:50:05,787 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-06 22:50:05,787 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-06 22:50:05,788 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-06 22:50:05,789 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-06 22:50:05,790 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 22:50:05,791 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 22:50:05,792 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 22:50:05,793 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 22:50:05,794 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 22:50:05,794 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 22:50:05,796 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 22:50:05,798 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 22:50:05,799 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 22:50:05,800 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 22:50:05,802 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 22:50:05,802 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 22:50:05,805 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 22:50:05,812 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 22:50:05,813 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 22:50:05,814 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 22:50:05,815 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 22:50:05,829 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 22:50:05,829 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 22:50:05,831 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 22:50:05,831 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 22:50:05,831 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 22:50:05,831 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 22:50:05,832 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 22:50:05,832 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 22:50:05,832 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 22:50:05,832 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 22:50:05,832 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 22:50:05,833 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 22:50:05,833 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 22:50:05,833 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 22:50:05,833 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 22:50:05,833 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 22:50:05,834 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 22:50:05,834 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 22:50:05,834 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 22:50:05,834 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 22:50:05,834 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 22:50:05,835 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 22:50:05,835 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 22:50:05,835 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 22:50:05,835 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 22:50:05,835 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 22:50:05,836 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 22:50:05,836 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 22:50:05,836 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 22:50:06,182 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 22:50:06,198 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 22:50:06,208 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 22:50:06,209 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 22:50:06,211 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 22:50:06,212 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label08.c [2019-11-06 22:50:06,278 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/841b75d03/242032598f044973af8234152fe0622b/FLAG7f232f6d4 [2019-11-06 22:50:06,840 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 22:50:06,841 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem14_label08.c [2019-11-06 22:50:06,854 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/841b75d03/242032598f044973af8234152fe0622b/FLAG7f232f6d4 [2019-11-06 22:50:07,118 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/841b75d03/242032598f044973af8234152fe0622b [2019-11-06 22:50:07,129 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 22:50:07,130 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 22:50:07,132 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 22:50:07,132 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 22:50:07,135 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 22:50:07,136 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:50:07" (1/1) ... [2019-11-06 22:50:07,139 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@43f3db85 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:50:07, skipping insertion in model container [2019-11-06 22:50:07,140 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:50:07" (1/1) ... [2019-11-06 22:50:07,147 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 22:50:07,214 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 22:50:07,850 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:50:07,855 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 22:50:07,972 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:50:07,988 INFO L192 MainTranslator]: Completed translation [2019-11-06 22:50:07,989 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:50:07 WrapperNode [2019-11-06 22:50:07,989 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 22:50:07,990 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 22:50:07,990 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 22:50:07,990 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 22:50:08,004 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:50:07" (1/1) ... [2019-11-06 22:50:08,004 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:50:07" (1/1) ... [2019-11-06 22:50:08,024 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:50:07" (1/1) ... [2019-11-06 22:50:08,024 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:50:07" (1/1) ... [2019-11-06 22:50:08,072 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:50:07" (1/1) ... [2019-11-06 22:50:08,090 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:50:07" (1/1) ... [2019-11-06 22:50:08,101 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:50:07" (1/1) ... [2019-11-06 22:50:08,113 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 22:50:08,114 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 22:50:08,114 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 22:50:08,114 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 22:50:08,115 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:50:07" (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 22:50:08,188 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 22:50:08,188 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 22:50:08,188 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 22:50:08,188 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 22:50:08,188 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 22:50:08,189 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 22:50:08,190 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 22:50:08,190 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 22:50:08,190 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 22:50:08,191 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 22:50:08,191 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 22:50:09,604 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 22:50:09,604 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 22:50:09,607 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:50:09 BoogieIcfgContainer [2019-11-06 22:50:09,607 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 22:50:09,608 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 22:50:09,608 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 22:50:09,612 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 22:50:09,612 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:50:07" (1/3) ... [2019-11-06 22:50:09,613 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65609ced and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:50:09, skipping insertion in model container [2019-11-06 22:50:09,614 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:50:07" (2/3) ... [2019-11-06 22:50:09,614 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65609ced and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:50:09, skipping insertion in model container [2019-11-06 22:50:09,614 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:50:09" (3/3) ... [2019-11-06 22:50:09,616 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem14_label08.c [2019-11-06 22:50:09,626 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 22:50:09,636 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 22:50:09,648 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 22:50:09,676 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 22:50:09,676 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 22:50:09,676 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 22:50:09,677 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 22:50:09,677 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 22:50:09,677 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 22:50:09,677 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 22:50:09,678 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 22:50:09,703 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states. [2019-11-06 22:50:09,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-11-06 22:50:09,710 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:50:09,711 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:50:09,713 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:50:09,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:50:09,719 INFO L82 PathProgramCache]: Analyzing trace with hash -597113733, now seen corresponding path program 1 times [2019-11-06 22:50:09,731 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:50:09,731 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034807822] [2019-11-06 22:50:09,732 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:50:09,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:50:09,959 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 22:50:09,959 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034807822] [2019-11-06 22:50:09,960 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:50:09,961 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-06 22:50:09,963 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309103825] [2019-11-06 22:50:09,968 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 22:50:09,970 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:50:09,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 22:50:09,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 22:50:09,988 INFO L87 Difference]: Start difference. First operand 254 states. Second operand 3 states. [2019-11-06 22:50:11,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:50:11,252 INFO L93 Difference]: Finished difference Result 688 states and 1223 transitions. [2019-11-06 22:50:11,256 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 22:50:11,258 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2019-11-06 22:50:11,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:50:11,285 INFO L225 Difference]: With dead ends: 688 [2019-11-06 22:50:11,286 INFO L226 Difference]: Without dead ends: 372 [2019-11-06 22:50:11,299 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 2 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 22:50:11,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2019-11-06 22:50:11,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 372. [2019-11-06 22:50:11,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 372 states. [2019-11-06 22:50:11,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 602 transitions. [2019-11-06 22:50:11,409 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 602 transitions. Word has length 18 [2019-11-06 22:50:11,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:50:11,410 INFO L462 AbstractCegarLoop]: Abstraction has 372 states and 602 transitions. [2019-11-06 22:50:11,410 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 22:50:11,410 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 602 transitions. [2019-11-06 22:50:11,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2019-11-06 22:50:11,414 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:50:11,414 INFO L410 BasicCegarLoop]: trace histogram [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 22:50:11,414 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:50:11,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:50:11,415 INFO L82 PathProgramCache]: Analyzing trace with hash -866058331, now seen corresponding path program 1 times [2019-11-06 22:50:11,415 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:50:11,415 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887885650] [2019-11-06 22:50:11,415 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:50:11,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:50:11,716 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:50:11,717 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887885650] [2019-11-06 22:50:11,717 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:50:11,717 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 22:50:11,718 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018074289] [2019-11-06 22:50:11,719 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:50:11,720 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:50:11,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:50:11,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:50:11,720 INFO L87 Difference]: Start difference. First operand 372 states and 602 transitions. Second operand 6 states. [2019-11-06 22:50:13,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:50:13,073 INFO L93 Difference]: Finished difference Result 1122 states and 1837 transitions. [2019-11-06 22:50:13,074 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:50:13,074 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 87 [2019-11-06 22:50:13,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:50:13,079 INFO L225 Difference]: With dead ends: 1122 [2019-11-06 22:50:13,079 INFO L226 Difference]: Without dead ends: 756 [2019-11-06 22:50:13,081 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 22:50:13,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 756 states. [2019-11-06 22:50:13,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 756 to 752. [2019-11-06 22:50:13,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 752 states. [2019-11-06 22:50:13,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 752 states to 752 states and 1190 transitions. [2019-11-06 22:50:13,134 INFO L78 Accepts]: Start accepts. Automaton has 752 states and 1190 transitions. Word has length 87 [2019-11-06 22:50:13,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:50:13,135 INFO L462 AbstractCegarLoop]: Abstraction has 752 states and 1190 transitions. [2019-11-06 22:50:13,135 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 22:50:13,135 INFO L276 IsEmpty]: Start isEmpty. Operand 752 states and 1190 transitions. [2019-11-06 22:50:13,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2019-11-06 22:50:13,138 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:50:13,138 INFO L410 BasicCegarLoop]: trace histogram [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] [2019-11-06 22:50:13,139 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:50:13,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:50:13,139 INFO L82 PathProgramCache]: Analyzing trace with hash -1300336130, now seen corresponding path program 1 times [2019-11-06 22:50:13,139 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:50:13,140 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404321010] [2019-11-06 22:50:13,140 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:50:13,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:50:13,285 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:50:13,285 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404321010] [2019-11-06 22:50:13,286 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:50:13,286 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-06 22:50:13,286 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939789332] [2019-11-06 22:50:13,287 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 22:50:13,287 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:50:13,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 22:50:13,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-06 22:50:13,288 INFO L87 Difference]: Start difference. First operand 752 states and 1190 transitions. Second operand 5 states. [2019-11-06 22:50:14,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:50:14,511 INFO L93 Difference]: Finished difference Result 1904 states and 3099 transitions. [2019-11-06 22:50:14,511 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:50:14,512 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 88 [2019-11-06 22:50:14,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:50:14,519 INFO L225 Difference]: With dead ends: 1904 [2019-11-06 22:50:14,519 INFO L226 Difference]: Without dead ends: 1158 [2019-11-06 22:50:14,522 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 22:50:14,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1158 states. [2019-11-06 22:50:14,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1158 to 1138. [2019-11-06 22:50:14,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1138 states. [2019-11-06 22:50:14,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1138 states to 1138 states and 1632 transitions. [2019-11-06 22:50:14,574 INFO L78 Accepts]: Start accepts. Automaton has 1138 states and 1632 transitions. Word has length 88 [2019-11-06 22:50:14,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:50:14,575 INFO L462 AbstractCegarLoop]: Abstraction has 1138 states and 1632 transitions. [2019-11-06 22:50:14,575 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 22:50:14,575 INFO L276 IsEmpty]: Start isEmpty. Operand 1138 states and 1632 transitions. [2019-11-06 22:50:14,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2019-11-06 22:50:14,578 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:50:14,578 INFO L410 BasicCegarLoop]: trace histogram [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 22:50:14,579 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:50:14,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:50:14,579 INFO L82 PathProgramCache]: Analyzing trace with hash -1278217766, now seen corresponding path program 1 times [2019-11-06 22:50:14,579 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:50:14,580 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528764207] [2019-11-06 22:50:14,580 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:50:14,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:50:14,664 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:50:14,665 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528764207] [2019-11-06 22:50:14,665 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:50:14,665 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-06 22:50:14,665 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315589779] [2019-11-06 22:50:14,666 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 22:50:14,666 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:50:14,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 22:50:14,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-06 22:50:14,667 INFO L87 Difference]: Start difference. First operand 1138 states and 1632 transitions. Second operand 5 states. [2019-11-06 22:50:15,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:50:15,837 INFO L93 Difference]: Finished difference Result 2880 states and 4162 transitions. [2019-11-06 22:50:15,839 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-06 22:50:15,839 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 90 [2019-11-06 22:50:15,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:50:15,849 INFO L225 Difference]: With dead ends: 2880 [2019-11-06 22:50:15,849 INFO L226 Difference]: Without dead ends: 1748 [2019-11-06 22:50:15,853 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 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 22:50:15,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1748 states. [2019-11-06 22:50:15,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1748 to 1326. [2019-11-06 22:50:15,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1326 states. [2019-11-06 22:50:15,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1326 states to 1326 states and 1863 transitions. [2019-11-06 22:50:15,907 INFO L78 Accepts]: Start accepts. Automaton has 1326 states and 1863 transitions. Word has length 90 [2019-11-06 22:50:15,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:50:15,908 INFO L462 AbstractCegarLoop]: Abstraction has 1326 states and 1863 transitions. [2019-11-06 22:50:15,908 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 22:50:15,908 INFO L276 IsEmpty]: Start isEmpty. Operand 1326 states and 1863 transitions. [2019-11-06 22:50:15,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2019-11-06 22:50:15,912 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:50:15,913 INFO L410 BasicCegarLoop]: trace histogram [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, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:50:15,913 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:50:15,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:50:15,914 INFO L82 PathProgramCache]: Analyzing trace with hash 1132692271, now seen corresponding path program 1 times [2019-11-06 22:50:15,914 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:50:15,914 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194979289] [2019-11-06 22:50:15,914 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:50:15,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:50:16,028 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2019-11-06 22:50:16,028 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194979289] [2019-11-06 22:50:16,029 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:50:16,029 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 22:50:16,029 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814207721] [2019-11-06 22:50:16,030 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 22:50:16,030 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:50:16,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 22:50:16,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:50:16,031 INFO L87 Difference]: Start difference. First operand 1326 states and 1863 transitions. Second operand 4 states. [2019-11-06 22:50:17,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:50:17,503 INFO L93 Difference]: Finished difference Result 4128 states and 5824 transitions. [2019-11-06 22:50:17,508 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 22:50:17,508 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 174 [2019-11-06 22:50:17,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:50:17,523 INFO L225 Difference]: With dead ends: 4128 [2019-11-06 22:50:17,523 INFO L226 Difference]: Without dead ends: 2808 [2019-11-06 22:50:17,527 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 22:50:17,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2808 states. [2019-11-06 22:50:17,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2808 to 1712. [2019-11-06 22:50:17,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1712 states. [2019-11-06 22:50:17,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1712 states to 1712 states and 2319 transitions. [2019-11-06 22:50:17,586 INFO L78 Accepts]: Start accepts. Automaton has 1712 states and 2319 transitions. Word has length 174 [2019-11-06 22:50:17,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:50:17,587 INFO L462 AbstractCegarLoop]: Abstraction has 1712 states and 2319 transitions. [2019-11-06 22:50:17,587 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 22:50:17,587 INFO L276 IsEmpty]: Start isEmpty. Operand 1712 states and 2319 transitions. [2019-11-06 22:50:17,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2019-11-06 22:50:17,593 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:50:17,593 INFO L410 BasicCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-11-06 22:50:17,594 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:50:17,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:50:17,594 INFO L82 PathProgramCache]: Analyzing trace with hash -1658054871, now seen corresponding path program 1 times [2019-11-06 22:50:17,594 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:50:17,595 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197684770] [2019-11-06 22:50:17,595 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:50:17,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:50:17,779 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2019-11-06 22:50:17,779 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197684770] [2019-11-06 22:50:17,780 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:50:17,780 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-06 22:50:17,781 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559746807] [2019-11-06 22:50:17,781 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 22:50:17,782 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:50:17,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 22:50:17,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 22:50:17,783 INFO L87 Difference]: Start difference. First operand 1712 states and 2319 transitions. Second operand 3 states. [2019-11-06 22:50:18,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:50:18,699 INFO L93 Difference]: Finished difference Result 4350 states and 6015 transitions. [2019-11-06 22:50:18,704 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 22:50:18,704 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 234 [2019-11-06 22:50:18,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:50:18,718 INFO L225 Difference]: With dead ends: 4350 [2019-11-06 22:50:18,718 INFO L226 Difference]: Without dead ends: 2644 [2019-11-06 22:50:18,723 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 1 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 22:50:18,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2644 states. [2019-11-06 22:50:18,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2644 to 2456. [2019-11-06 22:50:18,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2456 states. [2019-11-06 22:50:18,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2456 states to 2456 states and 3243 transitions. [2019-11-06 22:50:18,791 INFO L78 Accepts]: Start accepts. Automaton has 2456 states and 3243 transitions. Word has length 234 [2019-11-06 22:50:18,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:50:18,792 INFO L462 AbstractCegarLoop]: Abstraction has 2456 states and 3243 transitions. [2019-11-06 22:50:18,792 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 22:50:18,792 INFO L276 IsEmpty]: Start isEmpty. Operand 2456 states and 3243 transitions. [2019-11-06 22:50:18,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2019-11-06 22:50:18,798 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:50:18,799 INFO L410 BasicCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:50:18,799 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:50:18,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:50:18,799 INFO L82 PathProgramCache]: Analyzing trace with hash -121492162, now seen corresponding path program 1 times [2019-11-06 22:50:18,800 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:50:18,803 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232323140] [2019-11-06 22:50:18,804 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:50:18,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:50:19,811 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 132 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:50:19,812 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232323140] [2019-11-06 22:50:19,812 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1816817352] [2019-11-06 22:50:19,812 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 22:50:19,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:50:19,940 INFO L256 TraceCheckSpWp]: Trace formula consists of 442 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-06 22:50:19,964 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:50:20,108 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:50:20,232 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 122 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-11-06 22:50:20,232 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:50:20,390 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:50:20,392 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:50:20,394 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:50:20,395 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:50:20,425 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:50:20,530 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:50:20,716 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 22 proven. 108 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-06 22:50:20,716 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:50:20,716 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [11, 5] total 16 [2019-11-06 22:50:20,717 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775779553] [2019-11-06 22:50:20,717 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 22:50:20,718 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:50:20,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 22:50:20,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2019-11-06 22:50:20,718 INFO L87 Difference]: Start difference. First operand 2456 states and 3243 transitions. Second operand 5 states. [2019-11-06 22:50:22,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:50:22,071 INFO L93 Difference]: Finished difference Result 4928 states and 6538 transitions. [2019-11-06 22:50:22,072 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-06 22:50:22,072 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 259 [2019-11-06 22:50:22,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:50:22,083 INFO L225 Difference]: With dead ends: 4928 [2019-11-06 22:50:22,084 INFO L226 Difference]: Without dead ends: 2478 [2019-11-06 22:50:22,090 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 532 GetRequests, 513 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2019-11-06 22:50:22,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2478 states. [2019-11-06 22:50:22,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2478 to 2462. [2019-11-06 22:50:22,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2462 states. [2019-11-06 22:50:22,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2462 states to 2462 states and 3228 transitions. [2019-11-06 22:50:22,153 INFO L78 Accepts]: Start accepts. Automaton has 2462 states and 3228 transitions. Word has length 259 [2019-11-06 22:50:22,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:50:22,153 INFO L462 AbstractCegarLoop]: Abstraction has 2462 states and 3228 transitions. [2019-11-06 22:50:22,153 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 22:50:22,154 INFO L276 IsEmpty]: Start isEmpty. Operand 2462 states and 3228 transitions. [2019-11-06 22:50:22,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 344 [2019-11-06 22:50:22,161 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:50:22,162 INFO L410 BasicCegarLoop]: trace histogram [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, 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] [2019-11-06 22:50:22,366 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:50:22,366 INFO L410 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:50:22,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:50:22,366 INFO L82 PathProgramCache]: Analyzing trace with hash 1137249175, now seen corresponding path program 1 times [2019-11-06 22:50:22,366 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:50:22,367 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834180105] [2019-11-06 22:50:22,367 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:50:22,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:50:23,412 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 119 proven. 190 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-06 22:50:23,412 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834180105] [2019-11-06 22:50:23,412 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349345863] [2019-11-06 22:50:23,413 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 22:50:23,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:50:23,529 INFO L256 TraceCheckSpWp]: Trace formula consists of 565 conjuncts, 26 conjunts are in the unsatisfiable core [2019-11-06 22:50:23,536 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:50:23,599 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 4 terms [2019-11-06 22:50:23,804 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 248 proven. 53 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-11-06 22:50:23,804 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:50:23,885 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 4 terms [2019-11-06 22:50:24,386 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 41 proven. 268 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-06 22:50:24,386 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [1071626257] [2019-11-06 22:50:24,391 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 344 [2019-11-06 22:50:24,444 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-11-06 22:50:24,444 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-11-06 22:50:42,304 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-11-06 22:50:42,307 INFO L272 AbstractInterpreter]: Visited 138 different actions 271 times. Merged at 4 different actions 5 times. Never widened. Performed 536 root evaluator evaluations with a maximum evaluation depth of 13. Performed 536 inverse root evaluator evaluations with a maximum inverse evaluation depth of 13. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2019-11-06 22:50:42,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:50:42,310 INFO L536 sIntCurrentIteration]: Generating AbsInt predicates