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/ai/svcomp-Reach-32bit-Automizer_Default+AIv2_INT.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem13_label20.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-673a906-m [2019-10-02 20:18:02,569 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-02 20:18:02,571 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-02 20:18:02,589 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-02 20:18:02,590 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-02 20:18:02,591 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-02 20:18:02,592 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-02 20:18:02,594 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-02 20:18:02,595 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-02 20:18:02,596 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-02 20:18:02,597 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-02 20:18:02,598 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-02 20:18:02,599 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-02 20:18:02,599 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-02 20:18:02,600 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-02 20:18:02,601 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-02 20:18:02,602 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-02 20:18:02,603 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-02 20:18:02,605 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-02 20:18:02,607 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-02 20:18:02,608 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-02 20:18:02,609 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-02 20:18:02,610 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-02 20:18:02,611 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-02 20:18:02,613 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-02 20:18:02,620 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-02 20:18:02,621 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-02 20:18:02,621 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-02 20:18:02,622 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/svcomp-Reach-32bit-Automizer_Default+AIv2_INT.epf [2019-10-02 20:18:02,637 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-02 20:18:02,637 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-02 20:18:02,637 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-10-02 20:18:02,638 INFO L138 SettingsManager]: * Log level for plugins=info [2019-10-02 20:18:02,638 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-10-02 20:18:02,639 INFO L138 SettingsManager]: * User list type=DISABLED [2019-10-02 20:18:02,639 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-10-02 20:18:02,639 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-10-02 20:18:02,639 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-10-02 20:18:02,639 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-10-02 20:18:02,640 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-02 20:18:02,640 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-02 20:18:02,640 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-02 20:18:02,641 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-02 20:18:02,641 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-02 20:18:02,641 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-02 20:18:02,641 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-02 20:18:02,641 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-02 20:18:02,642 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-02 20:18:02,642 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-02 20:18:02,642 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-02 20:18:02,642 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-10-02 20:18:02,642 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-02 20:18:02,645 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-02 20:18:02,645 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-02 20:18:02,646 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-02 20:18:02,646 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-10-02 20:18:02,646 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-02 20:18:02,646 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-02 20:18:02,646 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-10-02 20:18:02,674 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-02 20:18:02,687 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-02 20:18:02,691 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-02 20:18:02,693 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-02 20:18:02,693 INFO L275 PluginConnector]: CDTParser initialized [2019-10-02 20:18:02,694 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem13_label20.c [2019-10-02 20:18:02,754 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/edeb77e38/aa16c954b9f94325b56637540e07455e/FLAG4505f5e93 [2019-10-02 20:18:03,677 INFO L306 CDTParser]: Found 1 translation units. [2019-10-02 20:18:03,678 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem13_label20.c [2019-10-02 20:18:03,733 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/edeb77e38/aa16c954b9f94325b56637540e07455e/FLAG4505f5e93 [2019-10-02 20:18:04,092 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/edeb77e38/aa16c954b9f94325b56637540e07455e [2019-10-02 20:18:04,102 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-02 20:18:04,103 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-02 20:18:04,104 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-02 20:18:04,105 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-02 20:18:04,108 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-02 20:18:04,109 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.10 08:18:04" (1/1) ... [2019-10-02 20:18:04,112 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@17644812 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 08:18:04, skipping insertion in model container [2019-10-02 20:18:04,112 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.10 08:18:04" (1/1) ... [2019-10-02 20:18:04,120 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-02 20:18:04,296 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-02 20:18:06,012 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-02 20:18:06,020 INFO L188 MainTranslator]: Completed pre-run [2019-10-02 20:18:06,736 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-02 20:18:06,776 INFO L192 MainTranslator]: Completed translation [2019-10-02 20:18:06,777 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 08:18:06 WrapperNode [2019-10-02 20:18:06,777 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-02 20:18:06,778 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-02 20:18:06,778 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-02 20:18:06,778 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-02 20:18:06,792 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 08:18:06" (1/1) ... [2019-10-02 20:18:06,795 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 08:18:06" (1/1) ... [2019-10-02 20:18:06,860 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 08:18:06" (1/1) ... [2019-10-02 20:18:06,860 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 08:18:06" (1/1) ... [2019-10-02 20:18:06,991 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 08:18:06" (1/1) ... [2019-10-02 20:18:07,022 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 08:18:06" (1/1) ... [2019-10-02 20:18:07,054 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 08:18:06" (1/1) ... [2019-10-02 20:18:07,089 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-02 20:18:07,089 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-02 20:18:07,090 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-02 20:18:07,090 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-02 20:18:07,091 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 08:18:06" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-02 20:18:07,175 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-02 20:18:07,176 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-02 20:18:07,176 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-02 20:18:07,176 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-10-02 20:18:07,176 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2019-10-02 20:18:07,177 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2019-10-02 20:18:07,177 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-02 20:18:07,177 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-02 20:18:07,177 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-10-02 20:18:07,178 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2019-10-02 20:18:07,178 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2019-10-02 20:18:07,178 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-02 20:18:07,178 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-02 20:18:07,178 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-02 20:18:07,179 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-02 20:18:07,179 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-02 20:18:07,179 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-02 20:18:13,331 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-02 20:18:13,332 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-02 20:18:13,334 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 08:18:13 BoogieIcfgContainer [2019-10-02 20:18:13,334 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-02 20:18:13,336 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-02 20:18:13,336 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-02 20:18:13,339 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-02 20:18:13,340 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.10 08:18:04" (1/3) ... [2019-10-02 20:18:13,341 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47612ba2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.10 08:18:13, skipping insertion in model container [2019-10-02 20:18:13,341 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 08:18:06" (2/3) ... [2019-10-02 20:18:13,341 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47612ba2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.10 08:18:13, skipping insertion in model container [2019-10-02 20:18:13,342 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 08:18:13" (3/3) ... [2019-10-02 20:18:13,343 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem13_label20.c [2019-10-02 20:18:13,354 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-02 20:18:13,365 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-02 20:18:13,384 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-02 20:18:13,416 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-10-02 20:18:13,417 INFO L378 AbstractCegarLoop]: Hoare is false [2019-10-02 20:18:13,417 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-02 20:18:13,417 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-02 20:18:13,417 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-02 20:18:13,417 INFO L382 AbstractCegarLoop]: Difference is false [2019-10-02 20:18:13,417 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-02 20:18:13,417 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-02 20:18:13,470 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states. [2019-10-02 20:18:13,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2019-10-02 20:18:13,485 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 20:18:13,486 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 20:18:13,489 INFO L418 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 20:18:13,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 20:18:13,495 INFO L82 PathProgramCache]: Analyzing trace with hash -1527050992, now seen corresponding path program 1 times [2019-10-02 20:18:13,498 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 20:18:13,551 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 20:18:13,552 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 20:18:13,553 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 20:18:13,553 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 20:18:13,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 20:18:14,431 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 20:18:14,433 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 20:18:14,434 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-02 20:18:14,434 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 20:18:14,439 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-02 20:18:14,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-02 20:18:14,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-02 20:18:14,457 INFO L87 Difference]: Start difference. First operand 1119 states. Second operand 4 states. [2019-10-02 20:18:24,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 20:18:24,260 INFO L93 Difference]: Finished difference Result 2851 states and 4840 transitions. [2019-10-02 20:18:24,261 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-02 20:18:24,263 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 61 [2019-10-02 20:18:24,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 20:18:24,314 INFO L225 Difference]: With dead ends: 2851 [2019-10-02 20:18:24,314 INFO L226 Difference]: Without dead ends: 2758 [2019-10-02 20:18:24,316 INFO L640 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 [2019-10-02 20:18:24,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2758 states. [2019-10-02 20:18:24,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2758 to 1919. [2019-10-02 20:18:24,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1919 states. [2019-10-02 20:18:24,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1919 states to 1919 states and 3313 transitions. [2019-10-02 20:18:24,484 INFO L78 Accepts]: Start accepts. Automaton has 1919 states and 3313 transitions. Word has length 61 [2019-10-02 20:18:24,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 20:18:24,485 INFO L475 AbstractCegarLoop]: Abstraction has 1919 states and 3313 transitions. [2019-10-02 20:18:24,485 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-02 20:18:24,485 INFO L276 IsEmpty]: Start isEmpty. Operand 1919 states and 3313 transitions. [2019-10-02 20:18:24,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2019-10-02 20:18:24,491 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 20:18:24,492 INFO L411 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, 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] [2019-10-02 20:18:24,492 INFO L418 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 20:18:24,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 20:18:24,493 INFO L82 PathProgramCache]: Analyzing trace with hash 430477289, now seen corresponding path program 1 times [2019-10-02 20:18:24,493 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 20:18:24,494 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 20:18:24,495 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 20:18:24,495 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 20:18:24,495 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 20:18:24,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 20:18:24,722 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 20:18:24,723 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 20:18:24,723 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-02 20:18:24,723 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 20:18:24,725 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-02 20:18:24,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-02 20:18:24,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-02 20:18:24,726 INFO L87 Difference]: Start difference. First operand 1919 states and 3313 transitions. Second operand 5 states. [2019-10-02 20:18:34,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 20:18:34,485 INFO L93 Difference]: Finished difference Result 3632 states and 5664 transitions. [2019-10-02 20:18:34,486 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-02 20:18:34,487 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 130 [2019-10-02 20:18:34,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 20:18:34,511 INFO L225 Difference]: With dead ends: 3632 [2019-10-02 20:18:34,512 INFO L226 Difference]: Without dead ends: 3632 [2019-10-02 20:18:34,513 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-10-02 20:18:34,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3632 states. [2019-10-02 20:18:34,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3632 to 3623. [2019-10-02 20:18:34,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3623 states. [2019-10-02 20:18:34,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3623 states to 3623 states and 5644 transitions. [2019-10-02 20:18:34,621 INFO L78 Accepts]: Start accepts. Automaton has 3623 states and 5644 transitions. Word has length 130 [2019-10-02 20:18:34,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 20:18:34,624 INFO L475 AbstractCegarLoop]: Abstraction has 3623 states and 5644 transitions. [2019-10-02 20:18:34,624 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-02 20:18:34,624 INFO L276 IsEmpty]: Start isEmpty. Operand 3623 states and 5644 transitions. [2019-10-02 20:18:34,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2019-10-02 20:18:34,633 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 20:18:34,634 INFO L411 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, 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] [2019-10-02 20:18:34,634 INFO L418 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 20:18:34,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 20:18:34,635 INFO L82 PathProgramCache]: Analyzing trace with hash 1084274893, now seen corresponding path program 1 times [2019-10-02 20:18:34,635 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 20:18:34,639 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 20:18:34,639 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 20:18:34,639 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 20:18:34,640 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 20:18:34,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 20:18:34,787 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 20:18:34,788 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 20:18:34,788 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-02 20:18:34,788 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 20:18:34,789 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-02 20:18:34,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-02 20:18:34,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-02 20:18:34,789 INFO L87 Difference]: Start difference. First operand 3623 states and 5644 transitions. Second operand 5 states. [2019-10-02 20:18:45,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 20:18:45,533 INFO L93 Difference]: Finished difference Result 7191 states and 10294 transitions. [2019-10-02 20:18:45,536 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-02 20:18:45,537 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 132 [2019-10-02 20:18:45,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 20:18:45,574 INFO L225 Difference]: With dead ends: 7191 [2019-10-02 20:18:45,575 INFO L226 Difference]: Without dead ends: 7191 [2019-10-02 20:18:45,584 INFO L640 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 [2019-10-02 20:18:45,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7191 states. [2019-10-02 20:18:45,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7191 to 7086. [2019-10-02 20:18:45,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7086 states. [2019-10-02 20:18:45,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7086 states to 7086 states and 10105 transitions. [2019-10-02 20:18:45,782 INFO L78 Accepts]: Start accepts. Automaton has 7086 states and 10105 transitions. Word has length 132 [2019-10-02 20:18:45,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 20:18:45,784 INFO L475 AbstractCegarLoop]: Abstraction has 7086 states and 10105 transitions. [2019-10-02 20:18:45,784 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-02 20:18:45,784 INFO L276 IsEmpty]: Start isEmpty. Operand 7086 states and 10105 transitions. [2019-10-02 20:18:45,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2019-10-02 20:18:45,787 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 20:18:45,787 INFO L411 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, 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] [2019-10-02 20:18:45,788 INFO L418 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 20:18:45,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 20:18:45,788 INFO L82 PathProgramCache]: Analyzing trace with hash 1000697413, now seen corresponding path program 1 times [2019-10-02 20:18:45,788 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 20:18:45,790 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 20:18:45,790 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 20:18:45,791 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 20:18:45,791 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 20:18:45,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 20:18:45,979 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 20:18:45,979 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 20:18:45,979 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-02 20:18:45,980 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 20:18:45,980 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-02 20:18:45,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-02 20:18:45,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-02 20:18:45,981 INFO L87 Difference]: Start difference. First operand 7086 states and 10105 transitions. Second operand 3 states. [2019-10-02 20:18:51,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 20:18:51,959 INFO L93 Difference]: Finished difference Result 13737 states and 18740 transitions. [2019-10-02 20:18:51,960 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-02 20:18:51,961 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 176 [2019-10-02 20:18:51,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 20:18:52,025 INFO L225 Difference]: With dead ends: 13737 [2019-10-02 20:18:52,026 INFO L226 Difference]: Without dead ends: 13737 [2019-10-02 20:18:52,026 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-02 20:18:52,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13737 states. [2019-10-02 20:18:52,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13737 to 13728. [2019-10-02 20:18:52,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13728 states. [2019-10-02 20:18:52,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13728 states to 13728 states and 18716 transitions. [2019-10-02 20:18:52,377 INFO L78 Accepts]: Start accepts. Automaton has 13728 states and 18716 transitions. Word has length 176 [2019-10-02 20:18:52,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 20:18:52,379 INFO L475 AbstractCegarLoop]: Abstraction has 13728 states and 18716 transitions. [2019-10-02 20:18:52,379 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-02 20:18:52,379 INFO L276 IsEmpty]: Start isEmpty. Operand 13728 states and 18716 transitions. [2019-10-02 20:18:52,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2019-10-02 20:18:52,383 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 20:18:52,383 INFO L411 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, 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] [2019-10-02 20:18:52,383 INFO L418 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 20:18:52,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 20:18:52,384 INFO L82 PathProgramCache]: Analyzing trace with hash -2141049635, now seen corresponding path program 1 times [2019-10-02 20:18:52,384 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 20:18:52,385 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 20:18:52,385 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 20:18:52,386 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 20:18:52,386 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 20:18:52,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 20:18:52,544 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 20:18:52,545 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 20:18:52,545 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-02 20:18:52,545 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 20:18:52,546 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-02 20:18:52,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-02 20:18:52,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-02 20:18:52,547 INFO L87 Difference]: Start difference. First operand 13728 states and 18716 transitions. Second operand 4 states. [2019-10-02 20:19:00,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 20:19:00,162 INFO L93 Difference]: Finished difference Result 17760 states and 21748 transitions. [2019-10-02 20:19:00,163 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-02 20:19:00,163 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 181 [2019-10-02 20:19:00,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 20:19:00,213 INFO L225 Difference]: With dead ends: 17760 [2019-10-02 20:19:00,213 INFO L226 Difference]: Without dead ends: 17760 [2019-10-02 20:19:00,214 INFO L640 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 [2019-10-02 20:19:00,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17760 states. [2019-10-02 20:19:00,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17760 to 16956. [2019-10-02 20:19:00,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16956 states. [2019-10-02 20:19:00,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16956 states to 16956 states and 20837 transitions. [2019-10-02 20:19:00,547 INFO L78 Accepts]: Start accepts. Automaton has 16956 states and 20837 transitions. Word has length 181 [2019-10-02 20:19:00,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 20:19:00,548 INFO L475 AbstractCegarLoop]: Abstraction has 16956 states and 20837 transitions. [2019-10-02 20:19:00,548 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-02 20:19:00,548 INFO L276 IsEmpty]: Start isEmpty. Operand 16956 states and 20837 transitions. [2019-10-02 20:19:00,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2019-10-02 20:19:00,554 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 20:19:00,554 INFO L411 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 20:19:00,555 INFO L418 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 20:19:00,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 20:19:00,555 INFO L82 PathProgramCache]: Analyzing trace with hash -293318598, now seen corresponding path program 1 times [2019-10-02 20:19:00,555 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 20:19:00,559 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 20:19:00,559 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 20:19:00,560 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 20:19:00,560 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 20:19:00,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 20:19:00,809 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 175 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 20:19:00,810 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-02 20:19:00,810 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-10-02 20:19:00,811 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 251 with the following transitions: [2019-10-02 20:19:00,813 INFO L207 CegarAbsIntRunner]: [0], [1], [2628], [2635], [2643], [2651], [2659], [2667], [2675], [2683], [2691], [2699], [2707], [2715], [2723], [2731], [2739], [2747], [2755], [2763], [2771], [2779], [2787], [2795], [2803], [2811], [2819], [2827], [2835], [2843], [2851], [2859], [2867], [2875], [2883], [2891], [2899], [2907], [2915], [2923], [2931], [2939], [2947], [2955], [2963], [2971], [2979], [2987], [2995], [3003], [3011], [3019], [3023], [3025], [3028], [3036], [3044], [3052], [3060], [3068], [3076], [3084], [3092], [3100], [3108], [3116], [3120], [3121], [3125], [3129], [3133], [3137], [3148], [3152], [3156], [3160], [3164], [3168], [3179], [3183], [3187], [3191], [3195], [3199], [3203], [3207], [3218], [3222], [3226], [3230], [3234], [3238], [3242], [3246], [3250], [3254], [3258], [3262], [3266], [3270], [3274], [3278], [3282], [3286], [3290], [3294], [3305], [3309], [3313], [3317], [3321], [3325], [3329], [3333], [3344], [3355], [3358], [3361], [3365], [4238], [4242], [4251], [4255], [4257], [4268], [4269], [4270], [4272], [4273] [2019-10-02 20:19:00,885 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-02 20:19:00,885 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-02 20:20:09,166 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-10-02 20:20:09,168 INFO L272 AbstractInterpreter]: Visited 123 different actions 123 times. Never merged. Never widened. Performed 164 root evaluator evaluations with a maximum evaluation depth of 17. Performed 164 inverse root evaluator evaluations with a maximum inverse evaluation depth of 17. Never found a fixpoint. Largest state had 26 variables. [2019-10-02 20:20:09,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 20:20:09,172 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-10-02 20:21:10,853 INFO L227 lantSequenceWeakener]: Weakened 239 states. On average, predicates are now at 71.42% of their original sizes. [2019-10-02 20:21:10,854 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-10-02 20:21:10,918 INFO L420 sIntCurrentIteration]: We unified 249 AI predicates to 249 [2019-10-02 20:21:10,918 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-10-02 20:21:10,919 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-02 20:21:10,919 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [8] imperfect sequences [6] total 12 [2019-10-02 20:21:10,919 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 20:21:10,920 INFO L454 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-02 20:21:10,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-02 20:21:10,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-10-02 20:21:10,921 INFO L87 Difference]: Start difference. First operand 16956 states and 20837 transitions. Second operand 8 states. [2019-10-02 20:23:39,176 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation.