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/Problem15_label44.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-673a906-m [2019-10-02 21:09:51,880 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-02 21:09:51,883 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-02 21:09:51,895 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-02 21:09:51,896 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-02 21:09:51,897 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-02 21:09:51,898 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-02 21:09:51,900 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-02 21:09:51,901 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-02 21:09:51,902 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-02 21:09:51,903 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-02 21:09:51,904 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-02 21:09:51,905 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-02 21:09:51,905 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-02 21:09:51,906 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-02 21:09:51,907 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-02 21:09:51,908 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-02 21:09:51,909 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-02 21:09:51,911 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-02 21:09:51,912 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-02 21:09:51,914 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-02 21:09:51,915 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-02 21:09:51,916 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-02 21:09:51,916 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-02 21:09:51,918 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-02 21:09:51,925 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-02 21:09:51,926 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-02 21:09:51,926 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-02 21:09:51,927 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 21:09:51,942 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-02 21:09:51,942 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-02 21:09:51,942 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-10-02 21:09:51,942 INFO L138 SettingsManager]: * Log level for plugins=info [2019-10-02 21:09:51,943 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-10-02 21:09:51,943 INFO L138 SettingsManager]: * User list type=DISABLED [2019-10-02 21:09:51,943 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-10-02 21:09:51,944 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-10-02 21:09:51,944 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-10-02 21:09:51,944 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-10-02 21:09:51,945 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-02 21:09:51,945 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-02 21:09:51,945 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-02 21:09:51,945 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-02 21:09:51,945 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-02 21:09:51,946 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-02 21:09:51,946 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-02 21:09:51,946 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-02 21:09:51,946 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-02 21:09:51,946 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-02 21:09:51,947 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-02 21:09:51,947 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-10-02 21:09:51,947 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-02 21:09:51,947 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-02 21:09:51,947 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-02 21:09:51,948 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-02 21:09:51,948 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-10-02 21:09:51,948 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-02 21:09:51,948 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-02 21:09:51,948 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-10-02 21:09:51,977 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-02 21:09:51,989 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-02 21:09:51,993 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-02 21:09:51,994 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-02 21:09:51,995 INFO L275 PluginConnector]: CDTParser initialized [2019-10-02 21:09:51,995 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem15_label44.c [2019-10-02 21:09:52,068 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/980375b5b/189424b4773049beaca6a378cd4ce24d/FLAG87ffa9b06 [2019-10-02 21:09:52,735 INFO L306 CDTParser]: Found 1 translation units. [2019-10-02 21:09:52,736 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem15_label44.c [2019-10-02 21:09:52,759 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/980375b5b/189424b4773049beaca6a378cd4ce24d/FLAG87ffa9b06 [2019-10-02 21:09:52,899 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/980375b5b/189424b4773049beaca6a378cd4ce24d [2019-10-02 21:09:52,909 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-02 21:09:52,910 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-02 21:09:52,912 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-02 21:09:52,912 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-02 21:09:52,915 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-02 21:09:52,916 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.10 09:09:52" (1/1) ... [2019-10-02 21:09:52,919 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@76f51de0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 09:09:52, skipping insertion in model container [2019-10-02 21:09:52,920 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.10 09:09:52" (1/1) ... [2019-10-02 21:09:52,927 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-02 21:09:53,012 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-02 21:09:53,926 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-02 21:09:53,931 INFO L188 MainTranslator]: Completed pre-run [2019-10-02 21:09:54,476 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-02 21:09:54,498 INFO L192 MainTranslator]: Completed translation [2019-10-02 21:09:54,498 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 09:09:54 WrapperNode [2019-10-02 21:09:54,499 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-02 21:09:54,500 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-02 21:09:54,500 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-02 21:09:54,500 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-02 21:09:54,518 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 09:09:54" (1/1) ... [2019-10-02 21:09:54,520 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 09:09:54" (1/1) ... [2019-10-02 21:09:54,586 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 09:09:54" (1/1) ... [2019-10-02 21:09:54,586 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 09:09:54" (1/1) ... [2019-10-02 21:09:54,671 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 09:09:54" (1/1) ... [2019-10-02 21:09:54,704 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 09:09:54" (1/1) ... [2019-10-02 21:09:54,727 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 09:09:54" (1/1) ... [2019-10-02 21:09:54,750 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-02 21:09:54,750 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-02 21:09:54,751 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-02 21:09:54,751 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-02 21:09:54,752 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 09:09:54" (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 21:09:54,838 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-02 21:09:54,838 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-02 21:09:54,838 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-02 21:09:54,838 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-10-02 21:09:54,839 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-02 21:09:54,839 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-02 21:09:54,839 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-10-02 21:09:54,839 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-02 21:09:54,840 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-02 21:09:54,840 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-02 21:09:54,840 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-02 21:09:54,841 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-02 21:09:54,841 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-02 21:09:58,121 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-02 21:09:58,122 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-02 21:09:58,124 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 09:09:58 BoogieIcfgContainer [2019-10-02 21:09:58,124 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-02 21:09:58,126 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-02 21:09:58,126 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-02 21:09:58,130 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-02 21:09:58,131 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.10 09:09:52" (1/3) ... [2019-10-02 21:09:58,132 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f420930 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.10 09:09:58, skipping insertion in model container [2019-10-02 21:09:58,132 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 09:09:54" (2/3) ... [2019-10-02 21:09:58,132 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f420930 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.10 09:09:58, skipping insertion in model container [2019-10-02 21:09:58,132 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 09:09:58" (3/3) ... [2019-10-02 21:09:58,138 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem15_label44.c [2019-10-02 21:09:58,152 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-02 21:09:58,168 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-02 21:09:58,187 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-02 21:09:58,223 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-10-02 21:09:58,224 INFO L378 AbstractCegarLoop]: Hoare is false [2019-10-02 21:09:58,224 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-02 21:09:58,225 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-02 21:09:58,225 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-02 21:09:58,225 INFO L382 AbstractCegarLoop]: Difference is false [2019-10-02 21:09:58,225 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-02 21:09:58,225 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-02 21:09:58,274 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states. [2019-10-02 21:09:58,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2019-10-02 21:09:58,297 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 21:09:58,298 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, 1] [2019-10-02 21:09:58,303 INFO L418 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 21:09:58,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 21:09:58,309 INFO L82 PathProgramCache]: Analyzing trace with hash 1323114568, now seen corresponding path program 1 times [2019-10-02 21:09:58,311 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 21:09:58,375 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 21:09:58,376 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 21:09:58,376 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 21:09:58,376 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 21:09:58,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 21:09:58,765 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 21:09:58,768 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 21:09:58,768 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-02 21:09:58,769 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 21:09:58,775 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-02 21:09:58,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-02 21:09:58,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-02 21:09:58,793 INFO L87 Difference]: Start difference. First operand 437 states. Second operand 4 states. [2019-10-02 21:10:03,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 21:10:03,621 INFO L93 Difference]: Finished difference Result 1066 states and 1447 transitions. [2019-10-02 21:10:03,621 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-02 21:10:03,622 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 72 [2019-10-02 21:10:03,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 21:10:03,656 INFO L225 Difference]: With dead ends: 1066 [2019-10-02 21:10:03,656 INFO L226 Difference]: Without dead ends: 993 [2019-10-02 21:10:03,658 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 21:10:03,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 993 states. [2019-10-02 21:10:03,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 993 to 682. [2019-10-02 21:10:03,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 682 states. [2019-10-02 21:10:03,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 682 states to 682 states and 1002 transitions. [2019-10-02 21:10:03,758 INFO L78 Accepts]: Start accepts. Automaton has 682 states and 1002 transitions. Word has length 72 [2019-10-02 21:10:03,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 21:10:03,759 INFO L475 AbstractCegarLoop]: Abstraction has 682 states and 1002 transitions. [2019-10-02 21:10:03,759 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-02 21:10:03,759 INFO L276 IsEmpty]: Start isEmpty. Operand 682 states and 1002 transitions. [2019-10-02 21:10:03,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2019-10-02 21:10:03,765 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 21:10:03,765 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, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 21:10:03,766 INFO L418 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 21:10:03,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 21:10:03,766 INFO L82 PathProgramCache]: Analyzing trace with hash 380539372, now seen corresponding path program 1 times [2019-10-02 21:10:03,767 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 21:10:03,768 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 21:10:03,768 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 21:10:03,768 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 21:10:03,769 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 21:10:03,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 21:10:03,976 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 65 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 21:10:03,976 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 21:10:03,976 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-02 21:10:03,977 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 21:10:03,979 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-02 21:10:03,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-02 21:10:03,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-02 21:10:03,979 INFO L87 Difference]: Start difference. First operand 682 states and 1002 transitions. Second operand 4 states. [2019-10-02 21:10:08,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 21:10:08,123 INFO L93 Difference]: Finished difference Result 1928 states and 2597 transitions. [2019-10-02 21:10:08,124 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-02 21:10:08,124 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 141 [2019-10-02 21:10:08,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 21:10:08,135 INFO L225 Difference]: With dead ends: 1928 [2019-10-02 21:10:08,135 INFO L226 Difference]: Without dead ends: 1928 [2019-10-02 21:10:08,136 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 21:10:08,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1928 states. [2019-10-02 21:10:08,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1928 to 1617. [2019-10-02 21:10:08,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1617 states. [2019-10-02 21:10:08,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1617 states to 1617 states and 2218 transitions. [2019-10-02 21:10:08,204 INFO L78 Accepts]: Start accepts. Automaton has 1617 states and 2218 transitions. Word has length 141 [2019-10-02 21:10:08,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 21:10:08,205 INFO L475 AbstractCegarLoop]: Abstraction has 1617 states and 2218 transitions. [2019-10-02 21:10:08,205 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-02 21:10:08,205 INFO L276 IsEmpty]: Start isEmpty. Operand 1617 states and 2218 transitions. [2019-10-02 21:10:08,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 291 [2019-10-02 21:10:08,215 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 21:10:08,215 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, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:10:08,216 INFO L418 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 21:10:08,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 21:10:08,216 INFO L82 PathProgramCache]: Analyzing trace with hash -1715878782, now seen corresponding path program 1 times [2019-10-02 21:10:08,216 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 21:10:08,218 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 21:10:08,218 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 21:10:08,219 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 21:10:08,219 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 21:10:08,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 21:10:08,702 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 133 proven. 87 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-02 21:10:08,703 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-02 21:10:08,704 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-10-02 21:10:08,705 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 291 with the following transitions: [2019-10-02 21:10:08,707 INFO L207 CegarAbsIntRunner]: [0], [1], [74], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [321], [329], [337], [345], [353], [361], [369], [377], [385], [393], [401], [409], [417], [425], [433], [441], [449], [457], [465], [473], [481], [489], [497], [505], [513], [521], [529], [537], [545], [553], [557], [559], [562], [567], [571], [582], [586], [590], [594], [598], [602], [606], [610], [614], [618], [622], [626], [630], [641], [645], [649], [653], [657], [668], [672], [676], [680], [684], [688], [691], [692], [696], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [755], [759], [763], [767], [771], [775], [779], [783], [787], [798], [809], [813], [816], [819], [823], [1635], [1639], [1648], [1652], [1654], [1661], [1662], [1663], [1665], [1666] [2019-10-02 21:10:08,812 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-02 21:10:08,813 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-02 21:10:11,542 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-10-02 21:10:16,371 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-10-02 21:10:16,374 INFO L272 AbstractInterpreter]: Visited 129 different actions 253 times. Merged at 4 different actions 5 times. Never widened. Performed 530 root evaluator evaluations with a maximum evaluation depth of 14. Performed 530 inverse root evaluator evaluations with a maximum inverse evaluation depth of 14. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2019-10-02 21:10:16,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 21:10:16,378 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-10-02 21:10:18,296 INFO L227 lantSequenceWeakener]: Weakened 285 states. On average, predicates are now at 78.13% of their original sizes. [2019-10-02 21:10:18,297 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-10-02 21:10:18,393 INFO L420 sIntCurrentIteration]: We unified 289 AI predicates to 289 [2019-10-02 21:10:18,394 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-10-02 21:10:18,395 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-02 21:10:18,395 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [12] imperfect sequences [6] total 16 [2019-10-02 21:10:18,395 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 21:10:18,396 INFO L454 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-02 21:10:18,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-02 21:10:18,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2019-10-02 21:10:18,397 INFO L87 Difference]: Start difference. First operand 1617 states and 2218 transitions. Second operand 12 states.