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/Problem11_label32.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 00:03:33,827 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 00:03:33,830 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 00:03:33,850 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-10-15 00:03:33,876 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 00:03:33,880 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 00:03:33,883 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 00:03:33,885 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 00:03:33,887 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 00:03:33,890 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 00:03:33,891 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 00:03:33,898 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 00:03:33,902 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 00:03:33,906 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 00:03:33,907 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 00:03:33,908 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 00:03:33,913 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 00:03:33,925 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 00:03:33,926 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 00:03:33,927 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 00:03:33,928 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 00:03:33,945 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 00:03:33,946 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 00:03:33,947 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 00:03:33,947 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 00:03:33,948 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 00:03:33,948 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 00:03:33,948 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 00:03:33,948 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 00:03:33,949 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 00:03:33,949 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 00:03:33,949 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 00:03:33,949 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 00:03:33,949 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 00:03:33,949 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 00:03:33,950 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 00:03:33,950 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 00:03:33,950 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 00:03:33,950 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 00:03:33,951 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 00:03:33,951 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 00:03:33,951 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 00:03:33,951 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 00:03:33,951 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 00:03:33,952 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 00:03:33,952 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 00:03:33,952 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 00:03:33,952 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 00:03:33,952 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 00:03:33,953 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 00:03:34,245 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 00:03:34,259 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 00:03:34,262 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 00:03:34,264 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 00:03:34,264 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 00:03:34,265 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem11_label32.c [2019-10-15 00:03:34,328 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1fcf91386/5212bc73697145b6a2bafac9ce61f300/FLAG959978f53 [2019-10-15 00:03:34,969 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 00:03:34,972 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem11_label32.c [2019-10-15 00:03:34,989 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1fcf91386/5212bc73697145b6a2bafac9ce61f300/FLAG959978f53 [2019-10-15 00:03:35,172 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1fcf91386/5212bc73697145b6a2bafac9ce61f300 [2019-10-15 00:03:35,183 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 00:03:35,185 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 00:03:35,186 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 00:03:35,186 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 00:03:35,190 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 00:03:35,191 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:03:35" (1/1) ... [2019-10-15 00:03:35,194 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7babf457 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:03:35, skipping insertion in model container [2019-10-15 00:03:35,194 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:03:35" (1/1) ... [2019-10-15 00:03:35,202 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 00:03:35,267 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 00:03:35,976 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 00:03:35,990 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 00:03:36,180 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 00:03:36,198 INFO L192 MainTranslator]: Completed translation [2019-10-15 00:03:36,198 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:03:36 WrapperNode [2019-10-15 00:03:36,199 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 00:03:36,200 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 00:03:36,200 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 00:03:36,200 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 00:03:36,215 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:03:36" (1/1) ... [2019-10-15 00:03:36,215 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:03:36" (1/1) ... [2019-10-15 00:03:36,239 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:03:36" (1/1) ... [2019-10-15 00:03:36,240 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:03:36" (1/1) ... [2019-10-15 00:03:36,293 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:03:36" (1/1) ... [2019-10-15 00:03:36,307 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:03:36" (1/1) ... [2019-10-15 00:03:36,315 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:03:36" (1/1) ... [2019-10-15 00:03:36,323 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 00:03:36,324 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 00:03:36,324 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 00:03:36,324 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 00:03:36,325 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:03:36" (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 00:03:36,377 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 00:03:36,378 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 00:03:36,378 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-15 00:03:36,378 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 00:03:36,379 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-15 00:03:36,379 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 00:03:36,379 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 00:03:36,379 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-15 00:03:36,380 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 00:03:36,380 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 00:03:36,380 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 00:03:38,191 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 00:03:38,192 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-15 00:03:38,193 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:03:38 BoogieIcfgContainer [2019-10-15 00:03:38,194 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 00:03:38,195 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 00:03:38,195 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 00:03:38,199 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 00:03:38,200 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 12:03:35" (1/3) ... [2019-10-15 00:03:38,201 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56ef2006 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:03:38, skipping insertion in model container [2019-10-15 00:03:38,201 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:03:36" (2/3) ... [2019-10-15 00:03:38,202 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56ef2006 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:03:38, skipping insertion in model container [2019-10-15 00:03:38,202 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:03:38" (3/3) ... [2019-10-15 00:03:38,204 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem11_label32.c [2019-10-15 00:03:38,216 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 00:03:38,227 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 00:03:38,241 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 00:03:38,286 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 00:03:38,286 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 00:03:38,286 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 00:03:38,287 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 00:03:38,287 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 00:03:38,287 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 00:03:38,287 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 00:03:38,288 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 00:03:38,325 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states. [2019-10-15 00:03:38,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2019-10-15 00:03:38,334 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:03:38,335 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, 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 00:03:38,337 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:03:38,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:03:38,383 INFO L82 PathProgramCache]: Analyzing trace with hash 1793890979, now seen corresponding path program 1 times [2019-10-15 00:03:38,394 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:03:38,395 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595869610] [2019-10-15 00:03:38,395 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:03:38,396 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:03:38,396 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:03:38,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:03:38,850 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 00:03:38,851 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595869610] [2019-10-15 00:03:38,852 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:03:38,852 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-15 00:03:38,853 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389620565] [2019-10-15 00:03:38,859 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 00:03:38,861 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:03:38,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 00:03:38,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 00:03:38,880 INFO L87 Difference]: Start difference. First operand 292 states. Second operand 4 states. [2019-10-15 00:03:40,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:03:40,961 INFO L93 Difference]: Finished difference Result 978 states and 1754 transitions. [2019-10-15 00:03:40,961 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 00:03:40,963 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 46 [2019-10-15 00:03:40,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:03:40,985 INFO L225 Difference]: With dead ends: 978 [2019-10-15 00:03:40,985 INFO L226 Difference]: Without dead ends: 619 [2019-10-15 00:03:41,000 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 00:03:41,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 619 states. [2019-10-15 00:03:41,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 619 to 619. [2019-10-15 00:03:41,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 619 states. [2019-10-15 00:03:41,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 619 states to 619 states and 859 transitions. [2019-10-15 00:03:41,113 INFO L78 Accepts]: Start accepts. Automaton has 619 states and 859 transitions. Word has length 46 [2019-10-15 00:03:41,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:03:41,114 INFO L462 AbstractCegarLoop]: Abstraction has 619 states and 859 transitions. [2019-10-15 00:03:41,114 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 00:03:41,115 INFO L276 IsEmpty]: Start isEmpty. Operand 619 states and 859 transitions. [2019-10-15 00:03:41,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2019-10-15 00:03:41,131 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:03:41,132 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:03:41,132 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:03:41,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:03:41,133 INFO L82 PathProgramCache]: Analyzing trace with hash -789201195, now seen corresponding path program 1 times [2019-10-15 00:03:41,134 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:03:41,134 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962247214] [2019-10-15 00:03:41,134 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:03:41,134 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:03:41,135 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:03:41,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:03:41,347 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:03:41,347 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962247214] [2019-10-15 00:03:41,348 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:03:41,348 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-15 00:03:41,348 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535683761] [2019-10-15 00:03:41,350 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 00:03:41,351 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:03:41,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 00:03:41,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 00:03:41,352 INFO L87 Difference]: Start difference. First operand 619 states and 859 transitions. Second operand 4 states. [2019-10-15 00:03:43,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:03:43,248 INFO L93 Difference]: Finished difference Result 2381 states and 3384 transitions. [2019-10-15 00:03:43,256 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 00:03:43,257 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 119 [2019-10-15 00:03:43,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:03:43,272 INFO L225 Difference]: With dead ends: 2381 [2019-10-15 00:03:43,272 INFO L226 Difference]: Without dead ends: 1768 [2019-10-15 00:03:43,275 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 00:03:43,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1768 states. [2019-10-15 00:03:43,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1768 to 1562. [2019-10-15 00:03:43,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1562 states. [2019-10-15 00:03:43,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1562 states to 1562 states and 2112 transitions. [2019-10-15 00:03:43,373 INFO L78 Accepts]: Start accepts. Automaton has 1562 states and 2112 transitions. Word has length 119 [2019-10-15 00:03:43,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:03:43,378 INFO L462 AbstractCegarLoop]: Abstraction has 1562 states and 2112 transitions. [2019-10-15 00:03:43,378 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 00:03:43,378 INFO L276 IsEmpty]: Start isEmpty. Operand 1562 states and 2112 transitions. [2019-10-15 00:03:43,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2019-10-15 00:03:43,385 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:03:43,385 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:03:43,386 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:03:43,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:03:43,386 INFO L82 PathProgramCache]: Analyzing trace with hash 1135320518, now seen corresponding path program 1 times [2019-10-15 00:03:43,387 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:03:43,387 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461184553] [2019-10-15 00:03:43,387 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:03:43,388 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:03:43,388 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:03:43,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:03:43,589 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:03:43,589 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461184553] [2019-10-15 00:03:43,590 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:03:43,590 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-15 00:03:43,590 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015912216] [2019-10-15 00:03:43,591 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 00:03:43,591 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:03:43,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 00:03:43,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-15 00:03:43,592 INFO L87 Difference]: Start difference. First operand 1562 states and 2112 transitions. Second operand 5 states. [2019-10-15 00:03:45,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:03:45,371 INFO L93 Difference]: Finished difference Result 4505 states and 6288 transitions. [2019-10-15 00:03:45,373 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-15 00:03:45,373 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 132 [2019-10-15 00:03:45,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:03:45,394 INFO L225 Difference]: With dead ends: 4505 [2019-10-15 00:03:45,395 INFO L226 Difference]: Without dead ends: 2949 [2019-10-15 00:03:45,400 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-10-15 00:03:45,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2949 states. [2019-10-15 00:03:45,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2949 to 2746. [2019-10-15 00:03:45,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2746 states. [2019-10-15 00:03:45,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2746 states to 2746 states and 3589 transitions. [2019-10-15 00:03:45,516 INFO L78 Accepts]: Start accepts. Automaton has 2746 states and 3589 transitions. Word has length 132 [2019-10-15 00:03:45,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:03:45,517 INFO L462 AbstractCegarLoop]: Abstraction has 2746 states and 3589 transitions. [2019-10-15 00:03:45,517 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 00:03:45,517 INFO L276 IsEmpty]: Start isEmpty. Operand 2746 states and 3589 transitions. [2019-10-15 00:03:45,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2019-10-15 00:03:45,524 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:03:45,524 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:03:45,525 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:03:45,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:03:45,525 INFO L82 PathProgramCache]: Analyzing trace with hash -26232308, now seen corresponding path program 1 times [2019-10-15 00:03:45,525 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:03:45,526 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966030797] [2019-10-15 00:03:45,526 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:03:45,526 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:03:45,526 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:03:45,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:03:45,850 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 34 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:03:45,851 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966030797] [2019-10-15 00:03:45,851 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254951659] [2019-10-15 00:03:45,851 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 00:03:45,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:03:45,983 INFO L256 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-15 00:03:46,016 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 00:03:46,225 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:03:46,225 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 00:03:46,328 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:03:46,328 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 00:03:46,329 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [8] total 9 [2019-10-15 00:03:46,329 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013368728] [2019-10-15 00:03:46,330 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 00:03:46,330 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:03:46,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 00:03:46,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2019-10-15 00:03:46,332 INFO L87 Difference]: Start difference. First operand 2746 states and 3589 transitions. Second operand 3 states. [2019-10-15 00:03:47,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:03:47,713 INFO L93 Difference]: Finished difference Result 6660 states and 8939 transitions. [2019-10-15 00:03:47,714 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 00:03:47,714 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 177 [2019-10-15 00:03:47,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:03:47,738 INFO L225 Difference]: With dead ends: 6660 [2019-10-15 00:03:47,738 INFO L226 Difference]: Without dead ends: 3920 [2019-10-15 00:03:47,747 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 363 GetRequests, 354 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2019-10-15 00:03:47,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3920 states. [2019-10-15 00:03:47,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3920 to 3913. [2019-10-15 00:03:47,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3913 states. [2019-10-15 00:03:47,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3913 states to 3913 states and 5163 transitions. [2019-10-15 00:03:47,913 INFO L78 Accepts]: Start accepts. Automaton has 3913 states and 5163 transitions. Word has length 177 [2019-10-15 00:03:47,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:03:47,914 INFO L462 AbstractCegarLoop]: Abstraction has 3913 states and 5163 transitions. [2019-10-15 00:03:47,914 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 00:03:47,915 INFO L276 IsEmpty]: Start isEmpty. Operand 3913 states and 5163 transitions. [2019-10-15 00:03:47,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2019-10-15 00:03:47,920 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:03:47,920 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 00:03:48,126 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 00:03:48,127 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:03:48,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:03:48,128 INFO L82 PathProgramCache]: Analyzing trace with hash -698829818, now seen corresponding path program 1 times [2019-10-15 00:03:48,128 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:03:48,129 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656317772] [2019-10-15 00:03:48,129 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:03:48,130 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:03:48,130 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:03:48,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:03:48,317 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 150 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:03:48,319 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656317772] [2019-10-15 00:03:48,319 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1968571126] [2019-10-15 00:03:48,320 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 [2019-10-15 00:03:48,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:03:48,413 INFO L256 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-15 00:03:48,419 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 00:03:48,471 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 81 proven. 0 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2019-10-15 00:03:48,471 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 00:03:48,581 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 81 proven. 0 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2019-10-15 00:03:48,581 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 00:03:48,582 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6] total 7 [2019-10-15 00:03:48,582 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50765515] [2019-10-15 00:03:48,585 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 00:03:48,586 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:03:48,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 00:03:48,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-15 00:03:48,587 INFO L87 Difference]: Start difference. First operand 3913 states and 5163 transitions. Second operand 3 states. [2019-10-15 00:03:49,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:03:49,794 INFO L93 Difference]: Finished difference Result 9903 states and 13431 transitions. [2019-10-15 00:03:49,795 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 00:03:49,796 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 203 [2019-10-15 00:03:49,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:03:49,831 INFO L225 Difference]: With dead ends: 9903 [2019-10-15 00:03:49,831 INFO L226 Difference]: Without dead ends: 5996 [2019-10-15 00:03:49,844 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 411 GetRequests, 405 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-15 00:03:49,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5996 states. [2019-10-15 00:03:49,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5996 to 5804. [2019-10-15 00:03:49,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5804 states. [2019-10-15 00:03:50,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5804 states to 5804 states and 7602 transitions. [2019-10-15 00:03:50,007 INFO L78 Accepts]: Start accepts. Automaton has 5804 states and 7602 transitions. Word has length 203 [2019-10-15 00:03:50,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:03:50,009 INFO L462 AbstractCegarLoop]: Abstraction has 5804 states and 7602 transitions. [2019-10-15 00:03:50,009 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 00:03:50,009 INFO L276 IsEmpty]: Start isEmpty. Operand 5804 states and 7602 transitions. [2019-10-15 00:03:50,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2019-10-15 00:03:50,021 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:03:50,021 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 00:03:50,224 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 00:03:50,225 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:03:50,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:03:50,226 INFO L82 PathProgramCache]: Analyzing trace with hash -1953365144, now seen corresponding path program 1 times [2019-10-15 00:03:50,227 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:03:50,227 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052170565] [2019-10-15 00:03:50,227 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:03:50,228 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:03:50,228 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:03:50,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:03:50,578 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 150 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:03:50,579 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052170565] [2019-10-15 00:03:50,579 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1523783837] [2019-10-15 00:03:50,579 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 [2019-10-15 00:03:50,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:03:50,683 INFO L256 TraceCheckSpWp]: Trace formula consists of 448 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-15 00:03:50,699 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 00:03:50,797 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 150 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:03:50,797 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 00:03:50,944 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 150 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:03:50,945 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [1172482238] [2019-10-15 00:03:50,956 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 244 [2019-10-15 00:03:51,021 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-15 00:03:51,021 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2)