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_label24.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 00:01:01,422 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 00:01:01,425 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 00:01:01,437 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-10-15 00:01:01,447 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 00:01:01,448 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 00:01:01,448 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 00:01:01,450 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 00:01:01,450 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 00:01:01,451 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 00:01:01,453 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 00:01:01,455 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 00:01:01,457 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 00:01:01,458 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 00:01:01,459 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 00:01:01,460 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 00:01:01,462 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 00:01:01,470 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 00:01:01,471 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 00:01:01,471 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 00:01:01,472 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 00:01:01,487 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 00:01:01,487 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 00:01:01,488 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 00:01:01,488 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 00:01:01,489 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 00:01:01,489 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 00:01:01,489 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 00:01:01,489 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 00:01:01,490 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 00:01:01,490 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 00:01:01,490 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 00:01:01,490 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 00:01:01,490 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 00:01:01,490 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 00:01:01,491 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 00:01:01,491 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 00:01:01,491 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 00:01:01,491 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 00:01:01,492 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 00:01:01,492 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 00:01:01,492 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 00:01:01,492 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 00:01:01,492 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 00:01:01,493 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 00:01:01,493 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 00:01:01,493 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 00:01:01,493 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 00:01:01,493 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 00:01:01,493 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 00:01:01,768 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 00:01:01,785 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 00:01:01,788 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 00:01:01,789 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 00:01:01,790 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 00:01:01,791 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem10_label24.c [2019-10-15 00:01:01,854 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/658e53a7c/7312ef6323194d4b921425ba92f8a876/FLAG2387c949e [2019-10-15 00:01:02,412 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 00:01:02,413 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem10_label24.c [2019-10-15 00:01:02,436 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/658e53a7c/7312ef6323194d4b921425ba92f8a876/FLAG2387c949e [2019-10-15 00:01:02,695 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/658e53a7c/7312ef6323194d4b921425ba92f8a876 [2019-10-15 00:01:02,705 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 00:01:02,707 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 00:01:02,708 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 00:01:02,708 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 00:01:02,711 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 00:01:02,711 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:01:02" (1/1) ... [2019-10-15 00:01:02,714 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2b536ee0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:01:02, skipping insertion in model container [2019-10-15 00:01:02,714 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:01:02" (1/1) ... [2019-10-15 00:01:02,722 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 00:01:02,764 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 00:01:03,295 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 00:01:03,301 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 00:01:03,440 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 00:01:03,460 INFO L192 MainTranslator]: Completed translation [2019-10-15 00:01:03,461 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:01:03 WrapperNode [2019-10-15 00:01:03,461 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 00:01:03,463 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 00:01:03,463 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 00:01:03,463 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 00:01:03,477 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:01:03" (1/1) ... [2019-10-15 00:01:03,477 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:01:03" (1/1) ... [2019-10-15 00:01:03,511 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:01:03" (1/1) ... [2019-10-15 00:01:03,512 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:01:03" (1/1) ... [2019-10-15 00:01:03,561 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:01:03" (1/1) ... [2019-10-15 00:01:03,580 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:01:03" (1/1) ... [2019-10-15 00:01:03,590 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:01:03" (1/1) ... [2019-10-15 00:01:03,602 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 00:01:03,603 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 00:01:03,603 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 00:01:03,603 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 00:01:03,605 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:01:03" (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 00:01:03,680 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 00:01:03,680 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 00:01:03,681 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-15 00:01:03,681 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 00:01:03,681 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-15 00:01:03,682 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 00:01:03,682 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 00:01:03,682 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-15 00:01:03,683 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 00:01:03,683 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 00:01:03,683 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 00:01:04,991 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 00:01:04,991 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-15 00:01:04,993 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:01:04 BoogieIcfgContainer [2019-10-15 00:01:04,993 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 00:01:04,994 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 00:01:04,994 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 00:01:04,998 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 00:01:04,998 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 12:01:02" (1/3) ... [2019-10-15 00:01:04,999 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@743f412d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:01:04, skipping insertion in model container [2019-10-15 00:01:04,999 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:01:03" (2/3) ... [2019-10-15 00:01:05,000 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@743f412d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:01:04, skipping insertion in model container [2019-10-15 00:01:05,000 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:01:04" (3/3) ... [2019-10-15 00:01:05,002 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem10_label24.c [2019-10-15 00:01:05,012 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 00:01:05,021 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 00:01:05,034 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 00:01:05,078 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 00:01:05,078 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 00:01:05,078 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 00:01:05,078 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 00:01:05,079 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 00:01:05,079 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 00:01:05,079 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 00:01:05,079 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 00:01:05,114 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states. [2019-10-15 00:01:05,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-10-15 00:01:05,122 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:01:05,123 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] [2019-10-15 00:01:05,125 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:01:05,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:01:05,132 INFO L82 PathProgramCache]: Analyzing trace with hash 894573055, now seen corresponding path program 1 times [2019-10-15 00:01:05,141 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:01:05,141 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433590355] [2019-10-15 00:01:05,141 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:01:05,142 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:01:05,142 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:01:05,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:01:05,434 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 00:01:05,434 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433590355] [2019-10-15 00:01:05,435 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:01:05,436 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 00:01:05,436 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995505307] [2019-10-15 00:01:05,441 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 00:01:05,443 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:01:05,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 00:01:05,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 00:01:05,461 INFO L87 Difference]: Start difference. First operand 215 states. Second operand 3 states. [2019-10-15 00:01:06,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:01:06,474 INFO L93 Difference]: Finished difference Result 571 states and 989 transitions. [2019-10-15 00:01:06,477 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 00:01:06,478 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2019-10-15 00:01:06,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:01:06,503 INFO L225 Difference]: With dead ends: 571 [2019-10-15 00:01:06,503 INFO L226 Difference]: Without dead ends: 294 [2019-10-15 00:01:06,513 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 00:01:06,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2019-10-15 00:01:06,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 294. [2019-10-15 00:01:06,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 294 states. [2019-10-15 00:01:06,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 421 transitions. [2019-10-15 00:01:06,585 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 421 transitions. Word has length 20 [2019-10-15 00:01:06,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:01:06,586 INFO L462 AbstractCegarLoop]: Abstraction has 294 states and 421 transitions. [2019-10-15 00:01:06,586 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 00:01:06,586 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 421 transitions. [2019-10-15 00:01:06,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2019-10-15 00:01:06,590 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:01:06,591 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-15 00:01:06,591 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:01:06,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:01:06,592 INFO L82 PathProgramCache]: Analyzing trace with hash 892965265, now seen corresponding path program 1 times [2019-10-15 00:01:06,592 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:01:06,592 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500300924] [2019-10-15 00:01:06,592 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:01:06,593 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:01:06,593 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:01:06,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:01:06,804 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:01:06,804 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500300924] [2019-10-15 00:01:06,804 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:01:06,805 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-15 00:01:06,805 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862473478] [2019-10-15 00:01:06,807 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 00:01:06,808 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:01:06,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 00:01:06,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-15 00:01:06,808 INFO L87 Difference]: Start difference. First operand 294 states and 421 transitions. Second operand 6 states. [2019-10-15 00:01:07,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:01:07,736 INFO L93 Difference]: Finished difference Result 741 states and 1061 transitions. [2019-10-15 00:01:07,736 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 00:01:07,737 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 89 [2019-10-15 00:01:07,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:01:07,741 INFO L225 Difference]: With dead ends: 741 [2019-10-15 00:01:07,741 INFO L226 Difference]: Without dead ends: 453 [2019-10-15 00:01:07,743 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 00:01:07,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2019-10-15 00:01:07,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 445. [2019-10-15 00:01:07,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 445 states. [2019-10-15 00:01:07,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 445 states to 445 states and 606 transitions. [2019-10-15 00:01:07,776 INFO L78 Accepts]: Start accepts. Automaton has 445 states and 606 transitions. Word has length 89 [2019-10-15 00:01:07,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:01:07,776 INFO L462 AbstractCegarLoop]: Abstraction has 445 states and 606 transitions. [2019-10-15 00:01:07,776 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 00:01:07,777 INFO L276 IsEmpty]: Start isEmpty. Operand 445 states and 606 transitions. [2019-10-15 00:01:07,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2019-10-15 00:01:07,780 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:01:07,780 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-15 00:01:07,780 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:01:07,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:01:07,781 INFO L82 PathProgramCache]: Analyzing trace with hash 712402589, now seen corresponding path program 1 times [2019-10-15 00:01:07,781 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:01:07,781 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540924790] [2019-10-15 00:01:07,782 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:01:07,782 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:01:07,782 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:01:07,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:01:07,892 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:01:07,893 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540924790] [2019-10-15 00:01:07,893 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:01:07,893 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-15 00:01:07,893 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395464098] [2019-10-15 00:01:07,895 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 00:01:07,895 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:01:07,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 00:01:07,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 00:01:07,896 INFO L87 Difference]: Start difference. First operand 445 states and 606 transitions. Second operand 4 states. [2019-10-15 00:01:09,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:01:09,010 INFO L93 Difference]: Finished difference Result 1609 states and 2232 transitions. [2019-10-15 00:01:09,012 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 00:01:09,012 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 99 [2019-10-15 00:01:09,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:01:09,018 INFO L225 Difference]: With dead ends: 1609 [2019-10-15 00:01:09,018 INFO L226 Difference]: Without dead ends: 735 [2019-10-15 00:01:09,021 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 00:01:09,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 735 states. [2019-10-15 00:01:09,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 735 to 592. [2019-10-15 00:01:09,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 592 states. [2019-10-15 00:01:09,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 592 states to 592 states and 801 transitions. [2019-10-15 00:01:09,055 INFO L78 Accepts]: Start accepts. Automaton has 592 states and 801 transitions. Word has length 99 [2019-10-15 00:01:09,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:01:09,056 INFO L462 AbstractCegarLoop]: Abstraction has 592 states and 801 transitions. [2019-10-15 00:01:09,056 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 00:01:09,056 INFO L276 IsEmpty]: Start isEmpty. Operand 592 states and 801 transitions. [2019-10-15 00:01:09,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2019-10-15 00:01:09,059 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:01:09,060 INFO L380 BasicCegarLoop]: trace histogram [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, 1, 1] [2019-10-15 00:01:09,060 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:01:09,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:01:09,060 INFO L82 PathProgramCache]: Analyzing trace with hash 1290039418, now seen corresponding path program 1 times [2019-10-15 00:01:09,061 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:01:09,061 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988822720] [2019-10-15 00:01:09,061 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:01:09,061 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:01:09,061 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:01:09,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:01:09,289 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:01:09,290 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988822720] [2019-10-15 00:01:09,290 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:01:09,290 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-15 00:01:09,290 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544521651] [2019-10-15 00:01:09,291 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 00:01:09,291 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:01:09,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 00:01:09,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-15 00:01:09,292 INFO L87 Difference]: Start difference. First operand 592 states and 801 transitions. Second operand 6 states. [2019-10-15 00:01:10,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:01:10,135 INFO L93 Difference]: Finished difference Result 1492 states and 2064 transitions. [2019-10-15 00:01:10,136 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 00:01:10,136 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 142 [2019-10-15 00:01:10,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:01:10,142 INFO L225 Difference]: With dead ends: 1492 [2019-10-15 00:01:10,143 INFO L226 Difference]: Without dead ends: 906 [2019-10-15 00:01:10,145 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 00:01:10,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 906 states. [2019-10-15 00:01:10,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 906 to 890. [2019-10-15 00:01:10,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 890 states. [2019-10-15 00:01:10,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 890 states to 890 states and 1141 transitions. [2019-10-15 00:01:10,184 INFO L78 Accepts]: Start accepts. Automaton has 890 states and 1141 transitions. Word has length 142 [2019-10-15 00:01:10,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:01:10,184 INFO L462 AbstractCegarLoop]: Abstraction has 890 states and 1141 transitions. [2019-10-15 00:01:10,185 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 00:01:10,185 INFO L276 IsEmpty]: Start isEmpty. Operand 890 states and 1141 transitions. [2019-10-15 00:01:10,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2019-10-15 00:01:10,192 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:01:10,192 INFO L380 BasicCegarLoop]: trace histogram [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, 2, 2, 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] [2019-10-15 00:01:10,192 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:01:10,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:01:10,193 INFO L82 PathProgramCache]: Analyzing trace with hash 1377962712, now seen corresponding path program 1 times [2019-10-15 00:01:10,195 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:01:10,195 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134294562] [2019-10-15 00:01:10,196 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:01:10,196 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:01:10,196 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:01:10,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:01:10,477 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 106 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:01:10,478 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134294562] [2019-10-15 00:01:10,478 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215689817] [2019-10-15 00:01:10,478 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 00:01:10,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:01:10,579 INFO L256 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-15 00:01:10,603 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 00:01:10,695 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 94 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-15 00:01:10,695 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 00:01:10,809 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 00:01:11,003 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 26 proven. 78 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-15 00:01:11,004 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 00:01:11,005 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 10 [2019-10-15 00:01:11,005 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219206295] [2019-10-15 00:01:11,006 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 00:01:11,006 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:01:11,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 00:01:11,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2019-10-15 00:01:11,008 INFO L87 Difference]: Start difference. First operand 890 states and 1141 transitions. Second operand 5 states. [2019-10-15 00:01:11,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:01:11,986 INFO L93 Difference]: Finished difference Result 1943 states and 2493 transitions. [2019-10-15 00:01:11,987 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 00:01:11,988 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 189 [2019-10-15 00:01:11,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:01:11,996 INFO L225 Difference]: With dead ends: 1943 [2019-10-15 00:01:11,996 INFO L226 Difference]: Without dead ends: 1059 [2019-10-15 00:01:12,000 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 385 GetRequests, 375 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2019-10-15 00:01:12,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1059 states. [2019-10-15 00:01:12,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1059 to 1047. [2019-10-15 00:01:12,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1047 states. [2019-10-15 00:01:12,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 1325 transitions. [2019-10-15 00:01:12,050 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 1325 transitions. Word has length 189 [2019-10-15 00:01:12,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:01:12,051 INFO L462 AbstractCegarLoop]: Abstraction has 1047 states and 1325 transitions. [2019-10-15 00:01:12,051 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 00:01:12,051 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 1325 transitions. [2019-10-15 00:01:12,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2019-10-15 00:01:12,055 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:01:12,056 INFO L380 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 00:01:12,261 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 00:01:12,261 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:01:12,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:01:12,262 INFO L82 PathProgramCache]: Analyzing trace with hash -608870379, now seen corresponding path program 1 times [2019-10-15 00:01:12,263 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:01:12,263 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718314495] [2019-10-15 00:01:12,264 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:01:12,264 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:01:12,265 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:01:12,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:01:13,225 INFO L134 CoverageAnalysis]: Checked inductivity of 261 backedges. 111 proven. 82 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2019-10-15 00:01:13,225 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718314495] [2019-10-15 00:01:13,225 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [467575842] [2019-10-15 00:01:13,226 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 00:01:13,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:01:13,331 INFO L256 TraceCheckSpWp]: Trace formula consists of 470 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-15 00:01:13,357 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 00:01:13,424 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 00:01:13,516 INFO L134 CoverageAnalysis]: Checked inductivity of 261 backedges. 245 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-15 00:01:13,517 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 00:01:13,594 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 00:01:13,595 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 00:01:13,786 INFO L134 CoverageAnalysis]: Checked inductivity of 261 backedges. 111 proven. 82 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2019-10-15 00:01:13,787 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [1596857812] [2019-10-15 00:01:13,794 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 260 [2019-10-15 00:01:13,847 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-15 00:01:13,847 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-15 00:01:18,410 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation.