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/Problem02_label45.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-09 07:03:25,736 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-09 07:03:25,739 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-09 07:03:25,754 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-09-09 07:03:25,818 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 [2019-09-09 07:03:25,854 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-09 07:03:25,854 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-09 07:03:25,854 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-09 07:03:25,855 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-09 07:03:25,856 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-09 07:03:25,856 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-09 07:03:25,856 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-09 07:03:25,857 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-09 07:03:25,857 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-09 07:03:25,857 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-09 07:03:25,859 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-09 07:03:25,859 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-09 07:03:25,859 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-09 07:03:25,860 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-09 07:03:25,860 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-09 07:03:25,860 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-09 07:03:25,860 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-09 07:03:25,861 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-09 07:03:25,861 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-09 07:03:25,861 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-09 07:03:25,861 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-09 07:03:25,861 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-09 07:03:25,862 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-09 07:03:25,862 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-09 07:03:25,862 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-09 07:03:25,862 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-09 07:03:25,862 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-09 07:03:25,863 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-09 07:03:25,863 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-09 07:03:25,863 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-09 07:03:25,899 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-09 07:03:25,912 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-09 07:03:25,916 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-09 07:03:25,917 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-09 07:03:25,918 INFO L275 PluginConnector]: CDTParser initialized [2019-09-09 07:03:25,918 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem02_label45.c [2019-09-09 07:03:25,979 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/861542ebb/58b10b8ecbd949839bae474c2f44ea23/FLAG47e957883 [2019-09-09 07:03:26,513 INFO L306 CDTParser]: Found 1 translation units. [2019-09-09 07:03:26,514 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem02_label45.c [2019-09-09 07:03:26,528 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/861542ebb/58b10b8ecbd949839bae474c2f44ea23/FLAG47e957883 [2019-09-09 07:03:26,803 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/861542ebb/58b10b8ecbd949839bae474c2f44ea23 [2019-09-09 07:03:26,812 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-09 07:03:26,814 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-09 07:03:26,815 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-09 07:03:26,815 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-09 07:03:26,818 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-09 07:03:26,819 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 07:03:26" (1/1) ... [2019-09-09 07:03:26,822 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@26f9c9f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:03:26, skipping insertion in model container [2019-09-09 07:03:26,823 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 07:03:26" (1/1) ... [2019-09-09 07:03:26,831 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-09 07:03:26,876 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-09 07:03:27,409 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 07:03:27,421 INFO L188 MainTranslator]: Completed pre-run [2019-09-09 07:03:27,541 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 07:03:27,560 INFO L192 MainTranslator]: Completed translation [2019-09-09 07:03:27,560 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:03:27 WrapperNode [2019-09-09 07:03:27,561 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-09 07:03:27,561 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-09 07:03:27,562 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-09 07:03:27,562 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-09 07:03:27,576 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:03:27" (1/1) ... [2019-09-09 07:03:27,577 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:03:27" (1/1) ... [2019-09-09 07:03:27,597 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:03:27" (1/1) ... [2019-09-09 07:03:27,598 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:03:27" (1/1) ... [2019-09-09 07:03:27,657 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:03:27" (1/1) ... [2019-09-09 07:03:27,683 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:03:27" (1/1) ... [2019-09-09 07:03:27,693 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:03:27" (1/1) ... [2019-09-09 07:03:27,699 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-09 07:03:27,700 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-09 07:03:27,700 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-09 07:03:27,700 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-09 07:03:27,701 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:03:27" (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 [2019-09-09 07:03:27,770 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-09 07:03:27,770 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-09 07:03:27,771 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-09-09 07:03:27,771 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-09 07:03:27,771 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-09-09 07:03:27,771 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-09 07:03:27,771 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-09 07:03:27,771 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-09-09 07:03:27,771 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-09 07:03:27,772 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-09 07:03:27,772 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-09 07:03:29,015 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-09 07:03:29,015 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-09 07:03:29,018 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 07:03:29 BoogieIcfgContainer [2019-09-09 07:03:29,018 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-09 07:03:29,019 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-09 07:03:29,020 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-09 07:03:29,023 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-09 07:03:29,023 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.09 07:03:26" (1/3) ... [2019-09-09 07:03:29,024 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54b31919 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 07:03:29, skipping insertion in model container [2019-09-09 07:03:29,025 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:03:27" (2/3) ... [2019-09-09 07:03:29,025 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54b31919 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 07:03:29, skipping insertion in model container [2019-09-09 07:03:29,026 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 07:03:29" (3/3) ... [2019-09-09 07:03:29,036 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem02_label45.c [2019-09-09 07:03:29,050 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-09 07:03:29,059 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-09 07:03:29,078 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-09 07:03:29,109 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-09 07:03:29,110 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-09 07:03:29,110 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-09 07:03:29,110 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-09 07:03:29,110 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-09 07:03:29,111 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-09 07:03:29,111 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-09 07:03:29,111 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-09 07:03:29,145 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states. [2019-09-09 07:03:29,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2019-09-09 07:03:29,161 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 07:03:29,162 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-09 07:03:29,164 INFO L418 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 07:03:29,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 07:03:29,170 INFO L82 PathProgramCache]: Analyzing trace with hash -1702778474, now seen corresponding path program 1 times [2019-09-09 07:03:29,173 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 07:03:29,217 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 07:03:29,217 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 07:03:29,217 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 07:03:29,217 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 07:03:29,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 07:03:29,651 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 07:03:29,654 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 07:03:29,654 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-09 07:03:29,655 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 07:03:29,666 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-09 07:03:29,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-09 07:03:29,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-09 07:03:29,686 INFO L87 Difference]: Start difference. First operand 236 states. Second operand 3 states. [2019-09-09 07:03:30,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 07:03:30,649 INFO L93 Difference]: Finished difference Result 388 states and 554 transitions. [2019-09-09 07:03:30,650 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-09 07:03:30,651 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 88 [2019-09-09 07:03:30,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 07:03:30,666 INFO L225 Difference]: With dead ends: 388 [2019-09-09 07:03:30,666 INFO L226 Difference]: Without dead ends: 320 [2019-09-09 07:03:30,668 INFO L628 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 [2019-09-09 07:03:30,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2019-09-09 07:03:30,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 320. [2019-09-09 07:03:30,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 320 states. [2019-09-09 07:03:30,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 465 transitions. [2019-09-09 07:03:30,742 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 465 transitions. Word has length 88 [2019-09-09 07:03:30,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 07:03:30,743 INFO L475 AbstractCegarLoop]: Abstraction has 320 states and 465 transitions. [2019-09-09 07:03:30,743 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-09 07:03:30,743 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 465 transitions. [2019-09-09 07:03:30,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2019-09-09 07:03:30,749 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 07:03:30,749 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-09 07:03:30,750 INFO L418 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 07:03:30,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 07:03:30,750 INFO L82 PathProgramCache]: Analyzing trace with hash 302411185, now seen corresponding path program 1 times [2019-09-09 07:03:30,751 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 07:03:30,752 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 07:03:30,752 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 07:03:30,752 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 07:03:30,752 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 07:03:30,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 07:03:30,862 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 07:03:30,862 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 07:03:30,863 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-09-09 07:03:30,863 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 07:03:30,865 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-09 07:03:30,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-09 07:03:30,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-09 07:03:30,866 INFO L87 Difference]: Start difference. First operand 320 states and 465 transitions. Second operand 4 states. [2019-09-09 07:03:31,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 07:03:31,902 INFO L93 Difference]: Finished difference Result 902 states and 1236 transitions. [2019-09-09 07:03:31,906 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-09 07:03:31,907 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 96 [2019-09-09 07:03:31,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 07:03:31,921 INFO L225 Difference]: With dead ends: 902 [2019-09-09 07:03:31,922 INFO L226 Difference]: Without dead ends: 902 [2019-09-09 07:03:31,923 INFO L628 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 [2019-09-09 07:03:31,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 902 states. [2019-09-09 07:03:31,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 902 to 899. [2019-09-09 07:03:31,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 899 states. [2019-09-09 07:03:31,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 899 states to 899 states and 1231 transitions. [2019-09-09 07:03:31,982 INFO L78 Accepts]: Start accepts. Automaton has 899 states and 1231 transitions. Word has length 96 [2019-09-09 07:03:31,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 07:03:31,983 INFO L475 AbstractCegarLoop]: Abstraction has 899 states and 1231 transitions. [2019-09-09 07:03:31,983 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-09 07:03:31,984 INFO L276 IsEmpty]: Start isEmpty. Operand 899 states and 1231 transitions. [2019-09-09 07:03:31,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2019-09-09 07:03:31,993 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 07:03:31,993 INFO L399 BasicCegarLoop]: trace histogram [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] [2019-09-09 07:03:31,994 INFO L418 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 07:03:31,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 07:03:31,994 INFO L82 PathProgramCache]: Analyzing trace with hash 574467246, now seen corresponding path program 1 times [2019-09-09 07:03:31,994 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 07:03:31,996 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 07:03:31,996 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 07:03:31,996 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 07:03:31,996 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 07:03:32,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 07:03:32,122 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 07:03:32,123 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 07:03:32,124 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-09 07:03:32,124 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 07:03:32,126 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-09 07:03:32,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-09 07:03:32,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-09-09 07:03:32,128 INFO L87 Difference]: Start difference. First operand 899 states and 1231 transitions. Second operand 6 states. [2019-09-09 07:03:32,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 07:03:32,958 INFO L93 Difference]: Finished difference Result 1229 states and 1711 transitions. [2019-09-09 07:03:32,959 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-09 07:03:32,959 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 110 [2019-09-09 07:03:32,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 07:03:32,967 INFO L225 Difference]: With dead ends: 1229 [2019-09-09 07:03:32,967 INFO L226 Difference]: Without dead ends: 1229 [2019-09-09 07:03:32,968 INFO L628 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 [2019-09-09 07:03:32,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1229 states. [2019-09-09 07:03:33,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1229 to 1211. [2019-09-09 07:03:33,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1211 states. [2019-09-09 07:03:33,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1211 states to 1211 states and 1651 transitions. [2019-09-09 07:03:33,011 INFO L78 Accepts]: Start accepts. Automaton has 1211 states and 1651 transitions. Word has length 110 [2019-09-09 07:03:33,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 07:03:33,012 INFO L475 AbstractCegarLoop]: Abstraction has 1211 states and 1651 transitions. [2019-09-09 07:03:33,012 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-09 07:03:33,012 INFO L276 IsEmpty]: Start isEmpty. Operand 1211 states and 1651 transitions. [2019-09-09 07:03:33,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2019-09-09 07:03:33,021 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 07:03:33,021 INFO L399 BasicCegarLoop]: trace histogram [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] [2019-09-09 07:03:33,021 INFO L418 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 07:03:33,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 07:03:33,022 INFO L82 PathProgramCache]: Analyzing trace with hash -1937402390, now seen corresponding path program 1 times [2019-09-09 07:03:33,022 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 07:03:33,023 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 07:03:33,023 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 07:03:33,023 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 07:03:33,024 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 07:03:33,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 07:03:33,216 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 07:03:33,217 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 07:03:33,217 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-09-09 07:03:33,217 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 07:03:33,218 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-09-09 07:03:33,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-09-09 07:03:33,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-09-09 07:03:33,219 INFO L87 Difference]: Start difference. First operand 1211 states and 1651 transitions. Second operand 7 states. [2019-09-09 07:03:34,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 07:03:34,754 INFO L93 Difference]: Finished difference Result 1860 states and 2440 transitions. [2019-09-09 07:03:34,755 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-09-09 07:03:34,755 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 112 [2019-09-09 07:03:34,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 07:03:34,769 INFO L225 Difference]: With dead ends: 1860 [2019-09-09 07:03:34,770 INFO L226 Difference]: Without dead ends: 1860 [2019-09-09 07:03:34,771 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2019-09-09 07:03:34,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1860 states. [2019-09-09 07:03:34,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1860 to 1829. [2019-09-09 07:03:34,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1829 states. [2019-09-09 07:03:34,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1829 states to 1829 states and 2301 transitions. [2019-09-09 07:03:34,848 INFO L78 Accepts]: Start accepts. Automaton has 1829 states and 2301 transitions. Word has length 112 [2019-09-09 07:03:34,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 07:03:34,848 INFO L475 AbstractCegarLoop]: Abstraction has 1829 states and 2301 transitions. [2019-09-09 07:03:34,848 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-09-09 07:03:34,849 INFO L276 IsEmpty]: Start isEmpty. Operand 1829 states and 2301 transitions. [2019-09-09 07:03:34,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2019-09-09 07:03:34,855 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 07:03:34,856 INFO L399 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-09 07:03:34,856 INFO L418 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 07:03:34,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 07:03:34,857 INFO L82 PathProgramCache]: Analyzing trace with hash -1854304108, now seen corresponding path program 1 times [2019-09-09 07:03:34,857 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 07:03:34,858 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 07:03:34,858 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 07:03:34,858 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 07:03:34,858 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 07:03:34,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 07:03:35,009 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 07:03:35,009 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 07:03:35,009 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-09 07:03:35,009 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 07:03:35,010 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-09 07:03:35,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-09 07:03:35,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-09-09 07:03:35,011 INFO L87 Difference]: Start difference. First operand 1829 states and 2301 transitions. Second operand 6 states. [2019-09-09 07:03:36,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 07:03:36,005 INFO L93 Difference]: Finished difference Result 3071 states and 3844 transitions. [2019-09-09 07:03:36,006 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-09 07:03:36,006 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 119 [2019-09-09 07:03:36,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 07:03:36,030 INFO L225 Difference]: With dead ends: 3071 [2019-09-09 07:03:36,030 INFO L226 Difference]: Without dead ends: 3071 [2019-09-09 07:03:36,031 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2019-09-09 07:03:36,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3071 states. [2019-09-09 07:03:36,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3071 to 2735. [2019-09-09 07:03:36,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2735 states. [2019-09-09 07:03:36,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2735 states to 2735 states and 3325 transitions. [2019-09-09 07:03:36,119 INFO L78 Accepts]: Start accepts. Automaton has 2735 states and 3325 transitions. Word has length 119 [2019-09-09 07:03:36,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 07:03:36,119 INFO L475 AbstractCegarLoop]: Abstraction has 2735 states and 3325 transitions. [2019-09-09 07:03:36,119 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-09 07:03:36,120 INFO L276 IsEmpty]: Start isEmpty. Operand 2735 states and 3325 transitions. [2019-09-09 07:03:36,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2019-09-09 07:03:36,125 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 07:03:36,125 INFO L399 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-09 07:03:36,125 INFO L418 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 07:03:36,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 07:03:36,126 INFO L82 PathProgramCache]: Analyzing trace with hash 2014345303, now seen corresponding path program 1 times [2019-09-09 07:03:36,126 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 07:03:36,129 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 07:03:36,129 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 07:03:36,130 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 07:03:36,130 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 07:03:36,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 07:03:36,346 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 20 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 07:03:36,346 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 07:03:36,346 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-09 07:03:36,347 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 124 with the following transitions: [2019-09-09 07:03:36,350 INFO L207 CegarAbsIntRunner]: [0], [1], [2], [6], [10], [14], [18], [22], [25], [26], [30], [34], [38], [42], [53], [64], [68], [72], [75], [76], [80], [84], [88], [92], [96], [100], [104], [108], [112], [116], [120], [124], [128], [132], [136], [140], [144], [148], [152], [156], [160], [171], [175], [179], [183], [187], [191], [195], [199], [210], [214], [218], [222], [233], [237], [241], [245], [249], [253], [257], [268], [272], [283], [287], [298], [309], [313], [317], [321], [325], [329], [333], [344], [348], [352], [356], [360], [364], [368], [372], [379], [383], [385], [863], [867], [876], [880], [882], [887], [888], [889], [891], [892] [2019-09-09 07:03:36,441 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-09 07:03:36,442 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-09 07:14:55,128 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-09 07:14:55,130 INFO L272 AbstractInterpreter]: Visited 92 different actions 268 times. Merged at 6 different actions 12 times. Never widened. Performed 713 root evaluator evaluations with a maximum evaluation depth of 18. Performed 713 inverse root evaluator evaluations with a maximum inverse evaluation depth of 18. Found 3 fixpoints after 2 different actions. Largest state had 38 variables. [2019-09-09 07:14:55,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 07:14:55,135 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates