/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/Problem01_label29.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 22:29:57,662 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 22:29:57,664 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 22:29:57,676 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-06 22:29:57,685 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 22:29:57,686 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 22:29:57,687 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 22:29:57,688 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 22:29:57,689 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 22:29:57,689 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 22:29:57,691 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 22:29:57,693 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 22:29:57,695 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 22:29:57,696 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 22:29:57,697 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 22:29:57,698 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 22:29:57,700 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 22:29:57,708 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 22:29:57,709 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 22:29:57,709 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 22:29:57,710 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 22:29:57,725 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 22:29:57,725 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 22:29:57,726 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 22:29:57,726 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 22:29:57,726 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 22:29:57,727 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 22:29:57,727 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 22:29:57,727 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 22:29:57,727 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 22:29:57,727 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 22:29:57,728 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 22:29:57,728 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 22:29:57,728 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 22:29:57,728 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 22:29:57,728 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 22:29:57,729 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 22:29:57,729 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 22:29:57,729 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 22:29:57,729 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 22:29:57,729 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 22:29:57,729 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 22:29:57,730 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 22:29:57,730 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 22:29:57,730 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 22:29:57,730 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 22:29:57,731 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 22:29:57,731 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 22:29:57,731 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 22:29:57,731 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 22:29:57,999 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 22:29:58,014 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 22:29:58,018 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 22:29:58,020 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 22:29:58,020 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 22:29:58,021 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem01_label29.c [2019-11-06 22:29:58,080 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e406c63fa/e7dc4515d26743e89f1357895f75255e/FLAG2f5c61612 [2019-11-06 22:29:58,569 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 22:29:58,569 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem01_label29.c [2019-11-06 22:29:58,586 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e406c63fa/e7dc4515d26743e89f1357895f75255e/FLAG2f5c61612 [2019-11-06 22:29:58,905 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e406c63fa/e7dc4515d26743e89f1357895f75255e [2019-11-06 22:29:58,915 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 22:29:58,917 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 22:29:58,918 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 22:29:58,918 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 22:29:58,921 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 22:29:58,922 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:29:58" (1/1) ... [2019-11-06 22:29:58,925 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@50356fa2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:29:58, skipping insertion in model container [2019-11-06 22:29:58,925 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:29:58" (1/1) ... [2019-11-06 22:29:58,932 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 22:29:58,989 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 22:29:59,514 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:29:59,519 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 22:29:59,636 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:29:59,655 INFO L192 MainTranslator]: Completed translation [2019-11-06 22:29:59,656 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:29:59 WrapperNode [2019-11-06 22:29:59,656 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 22:29:59,657 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 22:29:59,657 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 22:29:59,657 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 22:29:59,670 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:29:59" (1/1) ... [2019-11-06 22:29:59,670 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:29:59" (1/1) ... [2019-11-06 22:29:59,687 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:29:59" (1/1) ... [2019-11-06 22:29:59,687 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:29:59" (1/1) ... [2019-11-06 22:29:59,742 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:29:59" (1/1) ... [2019-11-06 22:29:59,759 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:29:59" (1/1) ... [2019-11-06 22:29:59,769 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:29:59" (1/1) ... [2019-11-06 22:29:59,778 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 22:29:59,778 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 22:29:59,778 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 22:29:59,779 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 22:29:59,779 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:29:59" (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 22:29:59,837 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 22:29:59,837 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 22:29:59,837 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 22:29:59,838 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 22:29:59,838 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 22:29:59,838 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 22:29:59,838 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 22:29:59,838 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 22:29:59,838 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 22:29:59,839 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 22:29:59,839 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 22:30:00,926 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 22:30:00,927 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 22:30:00,928 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:30:00 BoogieIcfgContainer [2019-11-06 22:30:00,928 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 22:30:00,929 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 22:30:00,929 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 22:30:00,932 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 22:30:00,933 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:29:58" (1/3) ... [2019-11-06 22:30:00,934 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@328d1d3e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:30:00, skipping insertion in model container [2019-11-06 22:30:00,934 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:29:59" (2/3) ... [2019-11-06 22:30:00,934 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@328d1d3e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:30:00, skipping insertion in model container [2019-11-06 22:30:00,934 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:30:00" (3/3) ... [2019-11-06 22:30:00,936 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem01_label29.c [2019-11-06 22:30:00,946 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 22:30:00,954 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 22:30:00,966 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 22:30:00,995 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 22:30:00,996 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 22:30:00,996 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 22:30:00,996 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 22:30:00,996 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 22:30:00,996 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 22:30:00,997 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 22:30:00,997 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 22:30:01,022 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states. [2019-11-06 22:30:01,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2019-11-06 22:30:01,033 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:30:01,035 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:30:01,036 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:30:01,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:30:01,042 INFO L82 PathProgramCache]: Analyzing trace with hash -1243928705, now seen corresponding path program 1 times [2019-11-06 22:30:01,052 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:30:01,052 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202129655] [2019-11-06 22:30:01,053 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:30:01,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:30:01,533 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 22:30:01,534 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202129655] [2019-11-06 22:30:01,535 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:30:01,536 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-06 22:30:01,537 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059926416] [2019-11-06 22:30:01,544 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 22:30:01,545 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:30:01,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 22:30:01,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 22:30:01,562 INFO L87 Difference]: Start difference. First operand 207 states. Second operand 3 states. [2019-11-06 22:30:02,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:30:02,384 INFO L93 Difference]: Finished difference Result 547 states and 938 transitions. [2019-11-06 22:30:02,384 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 22:30:02,386 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 107 [2019-11-06 22:30:02,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:30:02,411 INFO L225 Difference]: With dead ends: 547 [2019-11-06 22:30:02,412 INFO L226 Difference]: Without dead ends: 278 [2019-11-06 22:30:02,422 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 22:30:02,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2019-11-06 22:30:02,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 278. [2019-11-06 22:30:02,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 278 states. [2019-11-06 22:30:02,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 400 transitions. [2019-11-06 22:30:02,528 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 400 transitions. Word has length 107 [2019-11-06 22:30:02,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:30:02,529 INFO L462 AbstractCegarLoop]: Abstraction has 278 states and 400 transitions. [2019-11-06 22:30:02,529 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 22:30:02,529 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 400 transitions. [2019-11-06 22:30:02,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2019-11-06 22:30:02,533 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:30:02,533 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:30:02,534 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:30:02,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:30:02,534 INFO L82 PathProgramCache]: Analyzing trace with hash 1742380424, now seen corresponding path program 1 times [2019-11-06 22:30:02,535 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:30:02,535 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821526208] [2019-11-06 22:30:02,535 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:30:02,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:30:02,685 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:30:02,685 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821526208] [2019-11-06 22:30:02,686 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:30:02,686 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 22:30:02,686 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399967363] [2019-11-06 22:30:02,688 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:30:02,689 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:30:02,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:30:02,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:30:02,689 INFO L87 Difference]: Start difference. First operand 278 states and 400 transitions. Second operand 6 states. [2019-11-06 22:30:03,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:30:03,444 INFO L93 Difference]: Finished difference Result 703 states and 1026 transitions. [2019-11-06 22:30:03,445 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:30:03,446 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 117 [2019-11-06 22:30:03,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:30:03,450 INFO L225 Difference]: With dead ends: 703 [2019-11-06 22:30:03,451 INFO L226 Difference]: Without dead ends: 431 [2019-11-06 22:30:03,452 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 22:30:03,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2019-11-06 22:30:03,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 419. [2019-11-06 22:30:03,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 419 states. [2019-11-06 22:30:03,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 419 states to 419 states and 588 transitions. [2019-11-06 22:30:03,489 INFO L78 Accepts]: Start accepts. Automaton has 419 states and 588 transitions. Word has length 117 [2019-11-06 22:30:03,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:30:03,490 INFO L462 AbstractCegarLoop]: Abstraction has 419 states and 588 transitions. [2019-11-06 22:30:03,490 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 22:30:03,490 INFO L276 IsEmpty]: Start isEmpty. Operand 419 states and 588 transitions. [2019-11-06 22:30:03,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2019-11-06 22:30:03,494 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:30:03,494 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:30:03,495 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:30:03,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:30:03,495 INFO L82 PathProgramCache]: Analyzing trace with hash -1357354234, now seen corresponding path program 1 times [2019-11-06 22:30:03,495 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:30:03,495 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960072810] [2019-11-06 22:30:03,496 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:30:03,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:30:03,612 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:30:03,612 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960072810] [2019-11-06 22:30:03,613 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:30:03,613 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-06 22:30:03,614 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362050794] [2019-11-06 22:30:03,616 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 22:30:03,616 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:30:03,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 22:30:03,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 22:30:03,617 INFO L87 Difference]: Start difference. First operand 419 states and 588 transitions. Second operand 3 states. [2019-11-06 22:30:04,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:30:04,224 INFO L93 Difference]: Finished difference Result 1241 states and 1781 transitions. [2019-11-06 22:30:04,228 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 22:30:04,228 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 118 [2019-11-06 22:30:04,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:30:04,235 INFO L225 Difference]: With dead ends: 1241 [2019-11-06 22:30:04,235 INFO L226 Difference]: Without dead ends: 828 [2019-11-06 22:30:04,236 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 22:30:04,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 828 states. [2019-11-06 22:30:04,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 828 to 828. [2019-11-06 22:30:04,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 828 states. [2019-11-06 22:30:04,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 828 states to 828 states and 1140 transitions. [2019-11-06 22:30:04,269 INFO L78 Accepts]: Start accepts. Automaton has 828 states and 1140 transitions. Word has length 118 [2019-11-06 22:30:04,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:30:04,269 INFO L462 AbstractCegarLoop]: Abstraction has 828 states and 1140 transitions. [2019-11-06 22:30:04,270 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 22:30:04,270 INFO L276 IsEmpty]: Start isEmpty. Operand 828 states and 1140 transitions. [2019-11-06 22:30:04,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2019-11-06 22:30:04,277 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:30:04,277 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:30:04,277 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:30:04,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:30:04,278 INFO L82 PathProgramCache]: Analyzing trace with hash -1051124638, now seen corresponding path program 1 times [2019-11-06 22:30:04,278 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:30:04,278 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215226998] [2019-11-06 22:30:04,278 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:30:04,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:30:04,393 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:30:04,393 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215226998] [2019-11-06 22:30:04,393 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:30:04,393 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 22:30:04,394 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116460162] [2019-11-06 22:30:04,394 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:30:04,395 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:30:04,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:30:04,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:30:04,395 INFO L87 Difference]: Start difference. First operand 828 states and 1140 transitions. Second operand 6 states. [2019-11-06 22:30:05,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:30:05,184 INFO L93 Difference]: Finished difference Result 2250 states and 3291 transitions. [2019-11-06 22:30:05,185 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:30:05,185 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 132 [2019-11-06 22:30:05,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:30:05,195 INFO L225 Difference]: With dead ends: 2250 [2019-11-06 22:30:05,196 INFO L226 Difference]: Without dead ends: 1428 [2019-11-06 22:30:05,198 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 22:30:05,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1428 states. [2019-11-06 22:30:05,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1428 to 1400. [2019-11-06 22:30:05,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1400 states. [2019-11-06 22:30:05,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1400 states to 1400 states and 1853 transitions. [2019-11-06 22:30:05,259 INFO L78 Accepts]: Start accepts. Automaton has 1400 states and 1853 transitions. Word has length 132 [2019-11-06 22:30:05,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:30:05,260 INFO L462 AbstractCegarLoop]: Abstraction has 1400 states and 1853 transitions. [2019-11-06 22:30:05,260 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 22:30:05,260 INFO L276 IsEmpty]: Start isEmpty. Operand 1400 states and 1853 transitions. [2019-11-06 22:30:05,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2019-11-06 22:30:05,267 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:30:05,267 INFO L410 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:30:05,268 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:30:05,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:30:05,268 INFO L82 PathProgramCache]: Analyzing trace with hash 1449351597, now seen corresponding path program 1 times [2019-11-06 22:30:05,268 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:30:05,269 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403360988] [2019-11-06 22:30:05,269 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:30:05,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:30:05,351 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 34 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:30:05,352 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403360988] [2019-11-06 22:30:05,352 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1847255989] [2019-11-06 22:30:05,352 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 22:30:05,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:30:05,468 INFO L256 TraceCheckSpWp]: Trace formula consists of 425 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-06 22:30:05,492 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:30:05,630 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-11-06 22:30:05,631 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:30:05,759 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-11-06 22:30:05,760 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:30:05,760 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 4] total 9 [2019-11-06 22:30:05,761 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633197529] [2019-11-06 22:30:05,761 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 22:30:05,762 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:30:05,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 22:30:05,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2019-11-06 22:30:05,762 INFO L87 Difference]: Start difference. First operand 1400 states and 1853 transitions. Second operand 4 states. [2019-11-06 22:30:06,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:30:06,320 INFO L93 Difference]: Finished difference Result 4033 states and 5411 transitions. [2019-11-06 22:30:06,321 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 22:30:06,321 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 141 [2019-11-06 22:30:06,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:30:06,337 INFO L225 Difference]: With dead ends: 4033 [2019-11-06 22:30:06,337 INFO L226 Difference]: Without dead ends: 2639 [2019-11-06 22:30:06,342 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 275 SyntacticMatches, 5 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2019-11-06 22:30:06,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2639 states. [2019-11-06 22:30:06,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2639 to 2230. [2019-11-06 22:30:06,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2230 states. [2019-11-06 22:30:06,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2230 states to 2230 states and 2936 transitions. [2019-11-06 22:30:06,422 INFO L78 Accepts]: Start accepts. Automaton has 2230 states and 2936 transitions. Word has length 141 [2019-11-06 22:30:06,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:30:06,423 INFO L462 AbstractCegarLoop]: Abstraction has 2230 states and 2936 transitions. [2019-11-06 22:30:06,423 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 22:30:06,423 INFO L276 IsEmpty]: Start isEmpty. Operand 2230 states and 2936 transitions. [2019-11-06 22:30:06,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2019-11-06 22:30:06,429 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:30:06,430 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:30:06,633 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:30:06,634 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:30:06,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:30:06,634 INFO L82 PathProgramCache]: Analyzing trace with hash -1860694341, now seen corresponding path program 1 times [2019-11-06 22:30:06,634 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:30:06,634 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672243332] [2019-11-06 22:30:06,635 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:30:06,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:30:06,750 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 39 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:30:06,751 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672243332] [2019-11-06 22:30:06,751 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [965547814] [2019-11-06 22:30:06,751 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 22:30:06,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:30:06,846 INFO L256 TraceCheckSpWp]: Trace formula consists of 434 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 22:30:06,853 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:30:06,904 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-11-06 22:30:06,905 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:30:06,962 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-11-06 22:30:06,962 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-06 22:30:06,962 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6] total 7 [2019-11-06 22:30:06,963 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289200996] [2019-11-06 22:30:06,963 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 22:30:06,964 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:30:06,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 22:30:06,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-11-06 22:30:06,964 INFO L87 Difference]: Start difference. First operand 2230 states and 2936 transitions. Second operand 3 states. [2019-11-06 22:30:07,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:30:07,542 INFO L93 Difference]: Finished difference Result 6094 states and 8179 transitions. [2019-11-06 22:30:07,544 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 22:30:07,545 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 143 [2019-11-06 22:30:07,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:30:07,566 INFO L225 Difference]: With dead ends: 6094 [2019-11-06 22:30:07,566 INFO L226 Difference]: Without dead ends: 3870 [2019-11-06 22:30:07,573 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 291 GetRequests, 284 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-11-06 22:30:07,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3870 states. [2019-11-06 22:30:07,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3870 to 3870. [2019-11-06 22:30:07,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3870 states. [2019-11-06 22:30:07,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3870 states to 3870 states and 5003 transitions. [2019-11-06 22:30:07,683 INFO L78 Accepts]: Start accepts. Automaton has 3870 states and 5003 transitions. Word has length 143 [2019-11-06 22:30:07,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:30:07,692 INFO L462 AbstractCegarLoop]: Abstraction has 3870 states and 5003 transitions. [2019-11-06 22:30:07,693 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 22:30:07,693 INFO L276 IsEmpty]: Start isEmpty. Operand 3870 states and 5003 transitions. [2019-11-06 22:30:07,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2019-11-06 22:30:07,702 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:30:07,702 INFO L410 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:30:07,905 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:30:07,906 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:30:07,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:30:07,906 INFO L82 PathProgramCache]: Analyzing trace with hash 1424434759, now seen corresponding path program 1 times [2019-11-06 22:30:07,906 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:30:07,907 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887356322] [2019-11-06 22:30:07,907 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:30:07,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:30:07,997 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 45 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:30:07,997 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887356322] [2019-11-06 22:30:07,998 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [250434947] [2019-11-06 22:30:07,998 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:30:08,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:30:08,099 INFO L256 TraceCheckSpWp]: Trace formula consists of 434 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 22:30:08,103 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:30:08,143 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-11-06 22:30:08,143 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:30:08,196 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-11-06 22:30:08,197 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-06 22:30:08,197 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6] total 8 [2019-11-06 22:30:08,198 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909815890] [2019-11-06 22:30:08,198 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 22:30:08,199 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:30:08,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 22:30:08,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2019-11-06 22:30:08,200 INFO L87 Difference]: Start difference. First operand 3870 states and 5003 transitions. Second operand 4 states. [2019-11-06 22:30:08,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:30:08,969 INFO L93 Difference]: Finished difference Result 9090 states and 11769 transitions. [2019-11-06 22:30:08,969 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 22:30:08,970 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 149 [2019-11-06 22:30:08,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:30:08,996 INFO L225 Difference]: With dead ends: 9090 [2019-11-06 22:30:08,997 INFO L226 Difference]: Without dead ends: 5361 [2019-11-06 22:30:09,007 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 297 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2019-11-06 22:30:09,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5361 states. [2019-11-06 22:30:09,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5361 to 3592. [2019-11-06 22:30:09,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3592 states. [2019-11-06 22:30:09,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3592 states to 3592 states and 4383 transitions. [2019-11-06 22:30:09,122 INFO L78 Accepts]: Start accepts. Automaton has 3592 states and 4383 transitions. Word has length 149 [2019-11-06 22:30:09,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:30:09,122 INFO L462 AbstractCegarLoop]: Abstraction has 3592 states and 4383 transitions. [2019-11-06 22:30:09,122 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 22:30:09,122 INFO L276 IsEmpty]: Start isEmpty. Operand 3592 states and 4383 transitions. [2019-11-06 22:30:09,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2019-11-06 22:30:09,130 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:30:09,130 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:30:09,342 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:30:09,342 INFO L410 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:30:09,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:30:09,343 INFO L82 PathProgramCache]: Analyzing trace with hash -2121694836, now seen corresponding path program 1 times [2019-11-06 22:30:09,343 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:30:09,343 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006639030] [2019-11-06 22:30:09,343 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:30:09,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:30:09,430 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 61 proven. 20 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-11-06 22:30:09,430 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006639030] [2019-11-06 22:30:09,431 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [304919311] [2019-11-06 22:30:09,431 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:30:09,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:30:09,552 INFO L256 TraceCheckSpWp]: Trace formula consists of 507 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 22:30:09,557 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:30:09,673 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 64 proven. 2 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-11-06 22:30:09,673 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:30:09,797 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 61 proven. 20 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-11-06 22:30:09,797 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [1552521629] [2019-11-06 22:30:09,805 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 165 [2019-11-06 22:30:09,886 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-11-06 22:30:09,886 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2)