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/Problem12_label16.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-673a906-m [2019-10-02 20:03:31,722 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-02 20:03:31,725 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-02 20:03:31,745 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-10-02 20:03:31,793 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-02 20:03:31,794 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-02 20:03:31,794 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-02 20:03:31,795 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 20:03:31,830 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-02 20:03:31,831 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-02 20:03:31,831 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-10-02 20:03:31,832 INFO L138 SettingsManager]: * Log level for plugins=info [2019-10-02 20:03:31,834 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-10-02 20:03:31,835 INFO L138 SettingsManager]: * User list type=DISABLED [2019-10-02 20:03:31,835 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-10-02 20:03:31,835 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-10-02 20:03:31,835 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-10-02 20:03:31,835 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-10-02 20:03:31,836 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-02 20:03:31,839 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-02 20:03:31,839 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-02 20:03:31,840 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-02 20:03:31,840 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-02 20:03:31,840 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-02 20:03:31,840 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-02 20:03:31,840 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-02 20:03:31,841 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-02 20:03:31,841 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-02 20:03:31,843 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-02 20:03:31,843 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-10-02 20:03:31,843 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-02 20:03:31,843 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-02 20:03:31,844 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-02 20:03:31,844 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-02 20:03:31,846 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-10-02 20:03:31,846 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-02 20:03:31,847 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-02 20:03:31,847 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-10-02 20:03:31,875 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-02 20:03:31,888 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-02 20:03:31,892 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-02 20:03:31,893 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-02 20:03:31,894 INFO L275 PluginConnector]: CDTParser initialized [2019-10-02 20:03:31,895 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem12_label16.c [2019-10-02 20:03:31,959 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3836264d7/f482a9713aac415a925a589bb546f11b/FLAG6ce912880 [2019-10-02 20:03:32,699 INFO L306 CDTParser]: Found 1 translation units. [2019-10-02 20:03:32,701 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem12_label16.c [2019-10-02 20:03:32,739 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3836264d7/f482a9713aac415a925a589bb546f11b/FLAG6ce912880 [2019-10-02 20:03:32,808 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3836264d7/f482a9713aac415a925a589bb546f11b [2019-10-02 20:03:32,822 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-02 20:03:32,825 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-02 20:03:32,828 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-02 20:03:32,828 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-02 20:03:32,832 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-02 20:03:32,833 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.10 08:03:32" (1/1) ... [2019-10-02 20:03:32,839 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6d4f7f74 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 08:03:32, skipping insertion in model container [2019-10-02 20:03:32,839 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.10 08:03:32" (1/1) ... [2019-10-02 20:03:32,847 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-02 20:03:33,023 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-02 20:03:34,571 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-02 20:03:34,579 INFO L188 MainTranslator]: Completed pre-run [2019-10-02 20:03:35,326 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-02 20:03:35,359 INFO L192 MainTranslator]: Completed translation [2019-10-02 20:03:35,360 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 08:03:35 WrapperNode [2019-10-02 20:03:35,360 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-02 20:03:35,361 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-02 20:03:35,361 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-02 20:03:35,361 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-02 20:03:35,376 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 08:03:35" (1/1) ... [2019-10-02 20:03:35,378 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 08:03:35" (1/1) ... [2019-10-02 20:03:35,448 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 08:03:35" (1/1) ... [2019-10-02 20:03:35,448 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 08:03:35" (1/1) ... [2019-10-02 20:03:35,543 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 08:03:35" (1/1) ... [2019-10-02 20:03:35,575 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 08:03:35" (1/1) ... [2019-10-02 20:03:35,612 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 08:03:35" (1/1) ... [2019-10-02 20:03:35,650 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-02 20:03:35,651 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-02 20:03:35,651 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-02 20:03:35,651 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-02 20:03:35,652 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 08:03:35" (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 20:03:35,720 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-02 20:03:35,721 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-02 20:03:35,721 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-02 20:03:35,721 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-10-02 20:03:35,721 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2019-10-02 20:03:35,721 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2019-10-02 20:03:35,721 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-02 20:03:35,722 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-02 20:03:35,722 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-10-02 20:03:35,722 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2019-10-02 20:03:35,722 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2019-10-02 20:03:35,722 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-02 20:03:35,723 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-02 20:03:35,723 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-02 20:03:35,723 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-02 20:03:35,723 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-02 20:03:35,724 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-02 20:03:40,807 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-02 20:03:40,807 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-02 20:03:40,810 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 08:03:40 BoogieIcfgContainer [2019-10-02 20:03:40,811 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-02 20:03:40,814 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-02 20:03:40,814 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-02 20:03:40,818 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-02 20:03:40,818 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.10 08:03:32" (1/3) ... [2019-10-02 20:03:40,819 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5724de46 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.10 08:03:40, skipping insertion in model container [2019-10-02 20:03:40,821 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 08:03:35" (2/3) ... [2019-10-02 20:03:40,822 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5724de46 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.10 08:03:40, skipping insertion in model container [2019-10-02 20:03:40,823 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 08:03:40" (3/3) ... [2019-10-02 20:03:40,825 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem12_label16.c [2019-10-02 20:03:40,837 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-02 20:03:40,850 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-02 20:03:40,867 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-02 20:03:40,903 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-10-02 20:03:40,903 INFO L378 AbstractCegarLoop]: Hoare is false [2019-10-02 20:03:40,903 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-02 20:03:40,903 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-02 20:03:40,903 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-02 20:03:40,904 INFO L382 AbstractCegarLoop]: Difference is false [2019-10-02 20:03:40,904 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-02 20:03:40,904 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-02 20:03:40,953 INFO L276 IsEmpty]: Start isEmpty. Operand 839 states. [2019-10-02 20:03:40,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2019-10-02 20:03:40,971 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 20:03:40,972 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 20:03:40,975 INFO L418 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 20:03:40,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 20:03:40,982 INFO L82 PathProgramCache]: Analyzing trace with hash 1315979506, now seen corresponding path program 1 times [2019-10-02 20:03:40,984 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 20:03:41,048 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 20:03:41,048 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 20:03:41,048 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 20:03:41,048 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 20:03:41,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 20:03:41,457 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 20:03:41,460 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 20:03:41,460 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-02 20:03:41,460 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 20:03:41,466 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-02 20:03:41,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-02 20:03:41,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-02 20:03:41,485 INFO L87 Difference]: Start difference. First operand 839 states. Second operand 3 states. [2019-10-02 20:03:47,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 20:03:47,242 INFO L93 Difference]: Finished difference Result 1610 states and 2915 transitions. [2019-10-02 20:03:47,243 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-02 20:03:47,245 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 71 [2019-10-02 20:03:47,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 20:03:47,290 INFO L225 Difference]: With dead ends: 1610 [2019-10-02 20:03:47,290 INFO L226 Difference]: Without dead ends: 1542 [2019-10-02 20:03:47,293 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 20:03:47,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1542 states. [2019-10-02 20:03:47,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1542 to 1542. [2019-10-02 20:03:47,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1542 states. [2019-10-02 20:03:47,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1542 states to 1542 states and 2822 transitions. [2019-10-02 20:03:47,449 INFO L78 Accepts]: Start accepts. Automaton has 1542 states and 2822 transitions. Word has length 71 [2019-10-02 20:03:47,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 20:03:47,449 INFO L475 AbstractCegarLoop]: Abstraction has 1542 states and 2822 transitions. [2019-10-02 20:03:47,450 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-02 20:03:47,450 INFO L276 IsEmpty]: Start isEmpty. Operand 1542 states and 2822 transitions. [2019-10-02 20:03:47,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2019-10-02 20:03:47,457 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 20:03:47,457 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 20:03:47,458 INFO L418 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 20:03:47,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 20:03:47,459 INFO L82 PathProgramCache]: Analyzing trace with hash 1550888775, now seen corresponding path program 1 times [2019-10-02 20:03:47,459 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 20:03:47,461 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 20:03:47,461 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 20:03:47,462 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 20:03:47,462 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 20:03:47,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 20:03:47,683 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 20:03:47,684 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 20:03:47,684 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-02 20:03:47,684 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 20:03:47,686 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-02 20:03:47,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-02 20:03:47,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-02 20:03:47,687 INFO L87 Difference]: Start difference. First operand 1542 states and 2822 transitions. Second operand 5 states. [2019-10-02 20:03:54,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 20:03:54,472 INFO L93 Difference]: Finished difference Result 2376 states and 4006 transitions. [2019-10-02 20:03:54,475 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-02 20:03:54,475 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 144 [2019-10-02 20:03:54,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 20:03:54,492 INFO L225 Difference]: With dead ends: 2376 [2019-10-02 20:03:54,492 INFO L226 Difference]: Without dead ends: 2376 [2019-10-02 20:03:54,496 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 20:03:54,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2376 states. [2019-10-02 20:03:54,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2376 to 2350. [2019-10-02 20:03:54,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2350 states. [2019-10-02 20:03:54,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2350 states to 2350 states and 3968 transitions. [2019-10-02 20:03:54,572 INFO L78 Accepts]: Start accepts. Automaton has 2350 states and 3968 transitions. Word has length 144 [2019-10-02 20:03:54,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 20:03:54,575 INFO L475 AbstractCegarLoop]: Abstraction has 2350 states and 3968 transitions. [2019-10-02 20:03:54,575 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-02 20:03:54,575 INFO L276 IsEmpty]: Start isEmpty. Operand 2350 states and 3968 transitions. [2019-10-02 20:03:54,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2019-10-02 20:03:54,586 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 20:03:54,586 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, 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] [2019-10-02 20:03:54,587 INFO L418 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 20:03:54,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 20:03:54,587 INFO L82 PathProgramCache]: Analyzing trace with hash 318484651, now seen corresponding path program 1 times [2019-10-02 20:03:54,588 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 20:03:54,592 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 20:03:54,593 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 20:03:54,593 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 20:03:54,593 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 20:03:54,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 20:03:54,837 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 20:03:54,838 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 20:03:54,838 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-02 20:03:54,838 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 20:03:54,839 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-02 20:03:54,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-02 20:03:54,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-02 20:03:54,840 INFO L87 Difference]: Start difference. First operand 2350 states and 3968 transitions. Second operand 4 states. [2019-10-02 20:04:03,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 20:04:03,043 INFO L93 Difference]: Finished difference Result 7016 states and 11456 transitions. [2019-10-02 20:04:03,043 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-02 20:04:03,043 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 146 [2019-10-02 20:04:03,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 20:04:03,086 INFO L225 Difference]: With dead ends: 7016 [2019-10-02 20:04:03,087 INFO L226 Difference]: Without dead ends: 7016 [2019-10-02 20:04:03,087 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 20:04:03,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7016 states. [2019-10-02 20:04:03,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7016 to 7016. [2019-10-02 20:04:03,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7016 states. [2019-10-02 20:04:03,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7016 states to 7016 states and 11456 transitions. [2019-10-02 20:04:03,265 INFO L78 Accepts]: Start accepts. Automaton has 7016 states and 11456 transitions. Word has length 146 [2019-10-02 20:04:03,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 20:04:03,266 INFO L475 AbstractCegarLoop]: Abstraction has 7016 states and 11456 transitions. [2019-10-02 20:04:03,266 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-02 20:04:03,266 INFO L276 IsEmpty]: Start isEmpty. Operand 7016 states and 11456 transitions. [2019-10-02 20:04:03,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2019-10-02 20:04:03,269 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 20:04:03,269 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, 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 20:04:03,269 INFO L418 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 20:04:03,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 20:04:03,270 INFO L82 PathProgramCache]: Analyzing trace with hash 702612695, now seen corresponding path program 1 times [2019-10-02 20:04:03,270 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 20:04:03,272 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 20:04:03,272 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 20:04:03,272 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 20:04:03,272 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 20:04:03,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 20:04:03,451 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 20:04:03,451 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 20:04:03,452 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-02 20:04:03,452 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 20:04:03,453 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-02 20:04:03,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-02 20:04:03,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-02 20:04:03,453 INFO L87 Difference]: Start difference. First operand 7016 states and 11456 transitions. Second operand 6 states. [2019-10-02 20:04:10,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 20:04:10,158 INFO L93 Difference]: Finished difference Result 7255 states and 11634 transitions. [2019-10-02 20:04:10,159 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-02 20:04:10,159 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 152 [2019-10-02 20:04:10,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 20:04:10,198 INFO L225 Difference]: With dead ends: 7255 [2019-10-02 20:04:10,198 INFO L226 Difference]: Without dead ends: 7255 [2019-10-02 20:04:10,199 INFO L640 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 [2019-10-02 20:04:10,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7255 states. [2019-10-02 20:04:10,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7255 to 7224. [2019-10-02 20:04:10,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7224 states. [2019-10-02 20:04:10,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7224 states to 7224 states and 11484 transitions. [2019-10-02 20:04:10,427 INFO L78 Accepts]: Start accepts. Automaton has 7224 states and 11484 transitions. Word has length 152 [2019-10-02 20:04:10,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 20:04:10,427 INFO L475 AbstractCegarLoop]: Abstraction has 7224 states and 11484 transitions. [2019-10-02 20:04:10,427 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-02 20:04:10,427 INFO L276 IsEmpty]: Start isEmpty. Operand 7224 states and 11484 transitions. [2019-10-02 20:04:10,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2019-10-02 20:04:10,430 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 20:04:10,431 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, 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] [2019-10-02 20:04:10,431 INFO L418 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 20:04:10,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 20:04:10,432 INFO L82 PathProgramCache]: Analyzing trace with hash -460226657, now seen corresponding path program 1 times [2019-10-02 20:04:10,432 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 20:04:10,433 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 20:04:10,433 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 20:04:10,434 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 20:04:10,434 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 20:04:10,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 20:04:10,583 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 20:04:10,584 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 20:04:10,584 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-02 20:04:10,584 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 20:04:10,585 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-02 20:04:10,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-02 20:04:10,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-02 20:04:10,586 INFO L87 Difference]: Start difference. First operand 7224 states and 11484 transitions. Second operand 5 states. [2019-10-02 20:04:17,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 20:04:17,032 INFO L93 Difference]: Finished difference Result 14784 states and 22443 transitions. [2019-10-02 20:04:17,033 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-02 20:04:17,034 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 156 [2019-10-02 20:04:17,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 20:04:17,102 INFO L225 Difference]: With dead ends: 14784 [2019-10-02 20:04:17,102 INFO L226 Difference]: Without dead ends: 14784 [2019-10-02 20:04:17,103 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-02 20:04:17,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14784 states. [2019-10-02 20:04:17,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14784 to 13822. [2019-10-02 20:04:17,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13822 states. [2019-10-02 20:04:17,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13822 states to 13822 states and 20793 transitions. [2019-10-02 20:04:17,440 INFO L78 Accepts]: Start accepts. Automaton has 13822 states and 20793 transitions. Word has length 156 [2019-10-02 20:04:17,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 20:04:17,440 INFO L475 AbstractCegarLoop]: Abstraction has 13822 states and 20793 transitions. [2019-10-02 20:04:17,440 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-02 20:04:17,440 INFO L276 IsEmpty]: Start isEmpty. Operand 13822 states and 20793 transitions. [2019-10-02 20:04:17,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2019-10-02 20:04:17,446 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 20:04:17,447 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, 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, 1, 1, 1, 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 20:04:17,447 INFO L418 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 20:04:17,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 20:04:17,447 INFO L82 PathProgramCache]: Analyzing trace with hash -1221771209, now seen corresponding path program 1 times [2019-10-02 20:04:17,449 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 20:04:17,452 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 20:04:17,452 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 20:04:17,452 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 20:04:17,453 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 20:04:17,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 20:04:17,643 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 128 proven. 81 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-02 20:04:17,644 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-02 20:04:17,644 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-10-02 20:04:17,645 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 259 with the following transitions: [2019-10-02 20:04:17,648 INFO L207 CegarAbsIntRunner]: [0], [1], [1868], [1875], [1883], [1891], [1899], [1907], [1915], [1923], [1931], [1939], [1947], [1955], [1963], [1971], [1979], [1987], [1995], [2003], [2011], [2019], [2027], [2035], [2043], [2051], [2059], [2067], [2075], [2083], [2091], [2099], [2107], [2115], [2123], [2131], [2139], [2147], [2155], [2163], [2171], [2179], [2187], [2195], [2203], [2211], [2219], [2227], [2235], [2243], [2251], [2259], [2267], [2275], [2283], [2291], [2299], [2307], [2315], [2323], [2331], [2339], [2343], [2345], [2348], [2356], [2361], [2365], [2369], [2373], [2377], [2381], [2385], [2389], [2393], [2397], [2401], [2405], [2409], [2413], [2417], [2421], [2424], [2425], [2429], [2433], [2437], [2441], [2445], [2449], [2453], [2457], [2461], [2465], [2469], [2473], [2477], [2481], [2485], [2489], [2492], [3240], [3244], [3253], [3257], [3259], [3270], [3271], [3272], [3274], [3275] [2019-10-02 20:04:17,716 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-02 20:04:17,716 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-02 20:04:39,640 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-10-02 20:04:39,643 INFO L272 AbstractInterpreter]: Visited 107 different actions 107 times. Never merged. Never widened. Performed 258 root evaluator evaluations with a maximum evaluation depth of 16. Performed 258 inverse root evaluator evaluations with a maximum inverse evaluation depth of 16. Never found a fixpoint. Largest state had 26 variables. [2019-10-02 20:04:39,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 20:04:39,648 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-10-02 20:05:02,711 INFO L227 lantSequenceWeakener]: Weakened 239 states. On average, predicates are now at 76.03% of their original sizes. [2019-10-02 20:05:02,711 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-10-02 20:05:02,828 INFO L420 sIntCurrentIteration]: We unified 257 AI predicates to 257 [2019-10-02 20:05:02,829 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-10-02 20:05:02,829 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-02 20:05:02,830 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [11] imperfect sequences [6] total 15 [2019-10-02 20:05:02,830 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 20:05:02,831 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-02 20:05:02,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-02 20:05:02,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2019-10-02 20:05:02,832 INFO L87 Difference]: Start difference. First operand 13822 states and 20793 transitions. Second operand 11 states. [2019-10-02 20:08:10,033 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation.