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/Problem10_label26.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 00:01:03,934 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 00:01:03,936 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 00:01:03,949 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-10-15 00:01:03,959 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 00:01:03,960 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 00:01:03,961 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 00:01:03,962 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 00:01:03,963 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 00:01:03,964 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 00:01:03,966 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 00:01:03,969 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 00:01:03,970 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 00:01:03,972 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 00:01:03,973 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 00:01:03,974 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 00:01:03,976 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 00:01:03,985 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 00:01:03,986 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 00:01:03,986 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 00:01:03,987 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 [2019-10-15 00:01:04,010 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 00:01:04,011 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 00:01:04,013 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 00:01:04,013 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 00:01:04,014 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 00:01:04,014 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 00:01:04,014 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 00:01:04,014 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 00:01:04,015 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 00:01:04,015 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 00:01:04,016 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 00:01:04,016 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 00:01:04,016 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 00:01:04,017 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 00:01:04,017 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 00:01:04,017 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 00:01:04,017 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 00:01:04,017 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 00:01:04,018 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 00:01:04,018 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 00:01:04,018 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 00:01:04,018 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 00:01:04,019 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 00:01:04,019 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 00:01:04,019 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 00:01:04,020 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 00:01:04,020 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 00:01:04,020 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 00:01:04,020 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 [2019-10-15 00:01:04,350 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 00:01:04,376 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 00:01:04,380 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 00:01:04,382 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 00:01:04,383 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 00:01:04,384 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem10_label26.c [2019-10-15 00:01:04,466 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c5ab133dd/921db0e8ac2e41ce9617eb7017afda28/FLAG00a8e2ac8 [2019-10-15 00:01:05,025 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 00:01:05,025 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem10_label26.c [2019-10-15 00:01:05,051 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c5ab133dd/921db0e8ac2e41ce9617eb7017afda28/FLAG00a8e2ac8 [2019-10-15 00:01:05,274 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c5ab133dd/921db0e8ac2e41ce9617eb7017afda28 [2019-10-15 00:01:05,286 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 00:01:05,287 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 00:01:05,289 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 00:01:05,289 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 00:01:05,293 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 00:01:05,295 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:01:05" (1/1) ... [2019-10-15 00:01:05,298 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@71518f70 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:01:05, skipping insertion in model container [2019-10-15 00:01:05,298 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:01:05" (1/1) ... [2019-10-15 00:01:05,307 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 00:01:05,376 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 00:01:05,820 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 00:01:05,826 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 00:01:06,065 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 00:01:06,085 INFO L192 MainTranslator]: Completed translation [2019-10-15 00:01:06,086 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:01:06 WrapperNode [2019-10-15 00:01:06,086 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 00:01:06,090 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 00:01:06,090 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 00:01:06,091 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 00:01:06,106 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:01:06" (1/1) ... [2019-10-15 00:01:06,106 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:01:06" (1/1) ... [2019-10-15 00:01:06,125 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:01:06" (1/1) ... [2019-10-15 00:01:06,125 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:01:06" (1/1) ... [2019-10-15 00:01:06,166 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:01:06" (1/1) ... [2019-10-15 00:01:06,184 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:01:06" (1/1) ... [2019-10-15 00:01:06,198 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:01:06" (1/1) ... [2019-10-15 00:01:06,208 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 00:01:06,209 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 00:01:06,209 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 00:01:06,210 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 00:01:06,211 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:01:06" (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 [2019-10-15 00:01:06,291 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 00:01:06,292 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 00:01:06,292 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-15 00:01:06,292 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 00:01:06,292 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-15 00:01:06,293 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 00:01:06,293 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 00:01:06,294 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-15 00:01:06,294 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 00:01:06,295 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 00:01:06,295 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 00:01:07,592 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 00:01:07,592 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-15 00:01:07,596 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:01:07 BoogieIcfgContainer [2019-10-15 00:01:07,597 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 00:01:07,599 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 00:01:07,599 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 00:01:07,605 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 00:01:07,606 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 12:01:05" (1/3) ... [2019-10-15 00:01:07,607 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ddf3b8e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:01:07, skipping insertion in model container [2019-10-15 00:01:07,607 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:01:06" (2/3) ... [2019-10-15 00:01:07,607 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ddf3b8e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:01:07, skipping insertion in model container [2019-10-15 00:01:07,608 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:01:07" (3/3) ... [2019-10-15 00:01:07,619 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem10_label26.c [2019-10-15 00:01:07,630 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 00:01:07,640 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 00:01:07,653 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 00:01:07,691 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 00:01:07,691 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 00:01:07,691 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 00:01:07,691 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 00:01:07,691 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 00:01:07,692 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 00:01:07,692 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 00:01:07,692 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 00:01:07,715 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states. [2019-10-15 00:01:07,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-10-15 00:01:07,722 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:01:07,723 INFO L380 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] [2019-10-15 00:01:07,725 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:01:07,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:01:07,731 INFO L82 PathProgramCache]: Analyzing trace with hash 691378151, now seen corresponding path program 1 times [2019-10-15 00:01:07,741 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:01:07,741 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546574859] [2019-10-15 00:01:07,741 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:01:07,741 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:01:07,742 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:01:07,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:01:07,971 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:01:07,971 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546574859] [2019-10-15 00:01:07,972 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:01:07,973 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-15 00:01:07,973 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102210226] [2019-10-15 00:01:07,978 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 00:01:07,980 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:01:07,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 00:01:07,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 00:01:07,998 INFO L87 Difference]: Start difference. First operand 215 states. Second operand 4 states. [2019-10-15 00:01:09,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:01:09,663 INFO L93 Difference]: Finished difference Result 733 states and 1294 transitions. [2019-10-15 00:01:09,665 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 00:01:09,666 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2019-10-15 00:01:09,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:01:09,684 INFO L225 Difference]: With dead ends: 733 [2019-10-15 00:01:09,685 INFO L226 Difference]: Without dead ends: 437 [2019-10-15 00:01:09,693 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 00:01:09,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 437 states. [2019-10-15 00:01:09,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 437 to 437. [2019-10-15 00:01:09,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 437 states. [2019-10-15 00:01:09,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 437 states to 437 states and 633 transitions. [2019-10-15 00:01:09,781 INFO L78 Accepts]: Start accepts. Automaton has 437 states and 633 transitions. Word has length 22 [2019-10-15 00:01:09,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:01:09,782 INFO L462 AbstractCegarLoop]: Abstraction has 437 states and 633 transitions. [2019-10-15 00:01:09,783 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 00:01:09,784 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states and 633 transitions. [2019-10-15 00:01:09,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2019-10-15 00:01:09,792 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:01:09,793 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-15 00:01:09,794 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:01:09,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:01:09,795 INFO L82 PathProgramCache]: Analyzing trace with hash -1228814622, now seen corresponding path program 1 times [2019-10-15 00:01:09,796 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:01:09,796 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825227460] [2019-10-15 00:01:09,796 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:01:09,797 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:01:09,798 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:01:09,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:01:10,161 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:01:10,162 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825227460] [2019-10-15 00:01:10,162 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:01:10,162 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-15 00:01:10,163 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446773914] [2019-10-15 00:01:10,168 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 00:01:10,168 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:01:10,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 00:01:10,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-15 00:01:10,169 INFO L87 Difference]: Start difference. First operand 437 states and 633 transitions. Second operand 6 states. [2019-10-15 00:01:11,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:01:11,180 INFO L93 Difference]: Finished difference Result 1329 states and 2004 transitions. [2019-10-15 00:01:11,182 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 00:01:11,182 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 96 [2019-10-15 00:01:11,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:01:11,192 INFO L225 Difference]: With dead ends: 1329 [2019-10-15 00:01:11,193 INFO L226 Difference]: Without dead ends: 898 [2019-10-15 00:01:11,195 INFO L600 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 [2019-10-15 00:01:11,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 898 states. [2019-10-15 00:01:11,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 898 to 880. [2019-10-15 00:01:11,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 880 states. [2019-10-15 00:01:11,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 880 states to 880 states and 1284 transitions. [2019-10-15 00:01:11,258 INFO L78 Accepts]: Start accepts. Automaton has 880 states and 1284 transitions. Word has length 96 [2019-10-15 00:01:11,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:01:11,259 INFO L462 AbstractCegarLoop]: Abstraction has 880 states and 1284 transitions. [2019-10-15 00:01:11,259 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 00:01:11,259 INFO L276 IsEmpty]: Start isEmpty. Operand 880 states and 1284 transitions. [2019-10-15 00:01:11,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2019-10-15 00:01:11,261 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:01:11,261 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 00:01:11,262 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:01:11,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:01:11,262 INFO L82 PathProgramCache]: Analyzing trace with hash -1581481538, now seen corresponding path program 1 times [2019-10-15 00:01:11,262 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:01:11,263 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875246586] [2019-10-15 00:01:11,263 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:01:11,263 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:01:11,263 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:01:11,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:01:11,404 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:01:11,405 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875246586] [2019-10-15 00:01:11,405 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:01:11,405 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-15 00:01:11,405 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570154169] [2019-10-15 00:01:11,406 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 00:01:11,406 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:01:11,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 00:01:11,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-15 00:01:11,407 INFO L87 Difference]: Start difference. First operand 880 states and 1284 transitions. Second operand 6 states. [2019-10-15 00:01:12,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:01:12,396 INFO L93 Difference]: Finished difference Result 2219 states and 3338 transitions. [2019-10-15 00:01:12,397 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 00:01:12,397 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 98 [2019-10-15 00:01:12,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:01:12,412 INFO L225 Difference]: With dead ends: 2219 [2019-10-15 00:01:12,413 INFO L226 Difference]: Without dead ends: 1345 [2019-10-15 00:01:12,417 INFO L600 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 [2019-10-15 00:01:12,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1345 states. [2019-10-15 00:01:12,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1345 to 1039. [2019-10-15 00:01:12,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1039 states. [2019-10-15 00:01:12,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1039 states to 1039 states and 1449 transitions. [2019-10-15 00:01:12,523 INFO L78 Accepts]: Start accepts. Automaton has 1039 states and 1449 transitions. Word has length 98 [2019-10-15 00:01:12,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:01:12,527 INFO L462 AbstractCegarLoop]: Abstraction has 1039 states and 1449 transitions. [2019-10-15 00:01:12,527 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 00:01:12,528 INFO L276 IsEmpty]: Start isEmpty. Operand 1039 states and 1449 transitions. [2019-10-15 00:01:12,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2019-10-15 00:01:12,538 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:01:12,539 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 00:01:12,539 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:01:12,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:01:12,540 INFO L82 PathProgramCache]: Analyzing trace with hash -1874071259, now seen corresponding path program 1 times [2019-10-15 00:01:12,540 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:01:12,541 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891901559] [2019-10-15 00:01:12,541 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:01:12,541 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:01:12,542 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:01:12,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:01:12,741 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:01:12,742 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891901559] [2019-10-15 00:01:12,742 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:01:12,743 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-15 00:01:12,743 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118933130] [2019-10-15 00:01:12,745 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 00:01:12,746 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:01:12,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 00:01:12,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 00:01:12,746 INFO L87 Difference]: Start difference. First operand 1039 states and 1449 transitions. Second operand 4 states. [2019-10-15 00:01:13,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:01:13,838 INFO L93 Difference]: Finished difference Result 2942 states and 4192 transitions. [2019-10-15 00:01:13,840 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 00:01:13,840 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 101 [2019-10-15 00:01:13,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:01:13,850 INFO L225 Difference]: With dead ends: 2942 [2019-10-15 00:01:13,850 INFO L226 Difference]: Without dead ends: 1472 [2019-10-15 00:01:13,854 INFO L600 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 [2019-10-15 00:01:13,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1472 states. [2019-10-15 00:01:13,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1472 to 1329. [2019-10-15 00:01:13,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1329 states. [2019-10-15 00:01:13,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1329 states to 1329 states and 1824 transitions. [2019-10-15 00:01:13,917 INFO L78 Accepts]: Start accepts. Automaton has 1329 states and 1824 transitions. Word has length 101 [2019-10-15 00:01:13,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:01:13,918 INFO L462 AbstractCegarLoop]: Abstraction has 1329 states and 1824 transitions. [2019-10-15 00:01:13,918 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 00:01:13,918 INFO L276 IsEmpty]: Start isEmpty. Operand 1329 states and 1824 transitions. [2019-10-15 00:01:13,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2019-10-15 00:01:13,922 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:01:13,922 INFO L380 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 00:01:13,922 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:01:13,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:01:13,923 INFO L82 PathProgramCache]: Analyzing trace with hash 1198074754, now seen corresponding path program 1 times [2019-10-15 00:01:13,923 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:01:13,924 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730544863] [2019-10-15 00:01:13,924 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:01:13,924 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:01:13,925 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:01:13,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:01:14,122 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:01:14,123 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730544863] [2019-10-15 00:01:14,123 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:01:14,124 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-15 00:01:14,125 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400665320] [2019-10-15 00:01:14,126 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 00:01:14,126 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:01:14,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 00:01:14,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-15 00:01:14,127 INFO L87 Difference]: Start difference. First operand 1329 states and 1824 transitions. Second operand 6 states. [2019-10-15 00:01:14,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:01:14,997 INFO L93 Difference]: Finished difference Result 3276 states and 4678 transitions. [2019-10-15 00:01:14,998 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 00:01:14,998 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 144 [2019-10-15 00:01:15,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:01:15,012 INFO L225 Difference]: With dead ends: 3276 [2019-10-15 00:01:15,013 INFO L226 Difference]: Without dead ends: 1953 [2019-10-15 00:01:15,017 INFO L600 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 [2019-10-15 00:01:15,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1953 states. [2019-10-15 00:01:15,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1953 to 1774. [2019-10-15 00:01:15,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1774 states. [2019-10-15 00:01:15,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1774 states to 1774 states and 2331 transitions. [2019-10-15 00:01:15,111 INFO L78 Accepts]: Start accepts. Automaton has 1774 states and 2331 transitions. Word has length 144 [2019-10-15 00:01:15,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:01:15,113 INFO L462 AbstractCegarLoop]: Abstraction has 1774 states and 2331 transitions. [2019-10-15 00:01:15,113 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 00:01:15,113 INFO L276 IsEmpty]: Start isEmpty. Operand 1774 states and 2331 transitions. [2019-10-15 00:01:15,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 332 [2019-10-15 00:01:15,121 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:01:15,122 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-15 00:01:15,122 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:01:15,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:01:15,123 INFO L82 PathProgramCache]: Analyzing trace with hash -1270560873, now seen corresponding path program 1 times [2019-10-15 00:01:15,123 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:01:15,123 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623872554] [2019-10-15 00:01:15,123 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:01:15,124 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:01:15,124 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:01:15,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:01:15,699 INFO L134 CoverageAnalysis]: Checked inductivity of 304 backedges. 109 proven. 74 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2019-10-15 00:01:15,699 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623872554] [2019-10-15 00:01:15,700 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924790448] [2019-10-15 00:01:15,700 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 [2019-10-15 00:01:15,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:01:15,877 INFO L256 TraceCheckSpWp]: Trace formula consists of 541 conjuncts, 14 conjunts are in the unsatisfiable core [2019-10-15 00:01:15,921 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 00:01:16,026 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 5 terms [2019-10-15 00:01:16,027 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-15 00:01:16,031 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 00:01:16,032 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 00:01:16,037 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 00:01:16,038 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 00:01:16,039 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 00:01:16,040 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 00:01:16,042 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 00:01:16,043 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 00:01:16,044 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 00:01:16,572 INFO L134 CoverageAnalysis]: Checked inductivity of 304 backedges. 233 proven. 2 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2019-10-15 00:01:16,572 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 00:01:16,676 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-15 00:01:16,816 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-15 00:01:17,160 INFO L134 CoverageAnalysis]: Checked inductivity of 304 backedges. 233 proven. 2 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2019-10-15 00:01:17,161 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [722561] [2019-10-15 00:01:17,168 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 332 [2019-10-15 00:01:17,249 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-15 00:01:17,250 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2)