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/Problem11_label44.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-673a906-m [2019-10-02 19:50:14,798 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-02 19:50:14,801 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-02 19:50:14,821 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-10-02 19:50:14,867 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 19:50:14,882 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-02 19:50:14,882 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-02 19:50:14,882 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-10-02 19:50:14,882 INFO L138 SettingsManager]: * Log level for plugins=info [2019-10-02 19:50:14,883 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-10-02 19:50:14,883 INFO L138 SettingsManager]: * User list type=DISABLED [2019-10-02 19:50:14,884 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-10-02 19:50:14,884 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-10-02 19:50:14,884 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-10-02 19:50:14,884 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-10-02 19:50:14,885 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-02 19:50:14,885 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-02 19:50:14,885 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-02 19:50:14,886 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-02 19:50:14,886 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-02 19:50:14,886 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-02 19:50:14,886 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-02 19:50:14,886 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-02 19:50:14,887 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-02 19:50:14,887 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-02 19:50:14,887 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-02 19:50:14,887 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-10-02 19:50:14,888 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-02 19:50:14,888 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-02 19:50:14,888 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-02 19:50:14,888 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-02 19:50:14,888 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-10-02 19:50:14,889 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-02 19:50:14,889 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-02 19:50:14,889 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-10-02 19:50:14,939 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-02 19:50:14,957 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-02 19:50:14,963 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-02 19:50:14,966 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-02 19:50:14,967 INFO L275 PluginConnector]: CDTParser initialized [2019-10-02 19:50:14,968 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem11_label44.c [2019-10-02 19:50:15,038 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cfbd9dcb1/10c61abc49174228a036de41ffa1ade0/FLAG932b758e9 [2019-10-02 19:50:15,640 INFO L306 CDTParser]: Found 1 translation units. [2019-10-02 19:50:15,641 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem11_label44.c [2019-10-02 19:50:15,660 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cfbd9dcb1/10c61abc49174228a036de41ffa1ade0/FLAG932b758e9 [2019-10-02 19:50:15,806 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cfbd9dcb1/10c61abc49174228a036de41ffa1ade0 [2019-10-02 19:50:15,821 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-02 19:50:15,824 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-02 19:50:15,826 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-02 19:50:15,826 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-02 19:50:15,830 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-02 19:50:15,831 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.10 07:50:15" (1/1) ... [2019-10-02 19:50:15,834 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@572bfe52 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 07:50:15, skipping insertion in model container [2019-10-02 19:50:15,834 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.10 07:50:15" (1/1) ... [2019-10-02 19:50:15,842 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-02 19:50:15,919 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-02 19:50:16,459 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-02 19:50:16,467 INFO L188 MainTranslator]: Completed pre-run [2019-10-02 19:50:16,741 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-02 19:50:16,764 INFO L192 MainTranslator]: Completed translation [2019-10-02 19:50:16,764 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 07:50:16 WrapperNode [2019-10-02 19:50:16,764 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-02 19:50:16,765 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-02 19:50:16,765 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-02 19:50:16,766 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-02 19:50:16,781 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 07:50:16" (1/1) ... [2019-10-02 19:50:16,781 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 07:50:16" (1/1) ... [2019-10-02 19:50:16,807 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 07:50:16" (1/1) ... [2019-10-02 19:50:16,808 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 07:50:16" (1/1) ... [2019-10-02 19:50:16,869 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 07:50:16" (1/1) ... [2019-10-02 19:50:16,886 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 07:50:16" (1/1) ... [2019-10-02 19:50:16,904 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 07:50:16" (1/1) ... [2019-10-02 19:50:16,920 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-02 19:50:16,921 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-02 19:50:16,921 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-02 19:50:16,921 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-02 19:50:16,922 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 07:50:16" (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 19:50:17,006 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-02 19:50:17,007 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-02 19:50:17,007 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-02 19:50:17,007 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-02 19:50:17,007 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-02 19:50:17,008 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-02 19:50:17,008 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-02 19:50:17,009 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-02 19:50:17,009 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-02 19:50:17,009 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-02 19:50:17,009 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-02 19:50:19,093 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-02 19:50:19,094 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-02 19:50:19,095 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 07:50:19 BoogieIcfgContainer [2019-10-02 19:50:19,095 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-02 19:50:19,097 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-02 19:50:19,097 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-02 19:50:19,100 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-02 19:50:19,101 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.10 07:50:15" (1/3) ... [2019-10-02 19:50:19,102 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18e0df73 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.10 07:50:19, skipping insertion in model container [2019-10-02 19:50:19,102 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 07:50:16" (2/3) ... [2019-10-02 19:50:19,102 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18e0df73 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.10 07:50:19, skipping insertion in model container [2019-10-02 19:50:19,102 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 07:50:19" (3/3) ... [2019-10-02 19:50:19,104 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem11_label44.c [2019-10-02 19:50:19,115 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-02 19:50:19,126 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-02 19:50:19,145 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-02 19:50:19,173 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-10-02 19:50:19,174 INFO L378 AbstractCegarLoop]: Hoare is false [2019-10-02 19:50:19,174 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-02 19:50:19,174 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-02 19:50:19,174 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-02 19:50:19,175 INFO L382 AbstractCegarLoop]: Difference is false [2019-10-02 19:50:19,175 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-02 19:50:19,175 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-02 19:50:19,200 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states. [2019-10-02 19:50:19,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-10-02 19:50:19,211 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 19:50:19,212 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] [2019-10-02 19:50:19,214 INFO L418 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 19:50:19,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 19:50:19,219 INFO L82 PathProgramCache]: Analyzing trace with hash 1276641867, now seen corresponding path program 1 times [2019-10-02 19:50:19,221 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 19:50:19,272 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 19:50:19,273 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 19:50:19,273 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 19:50:19,273 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 19:50:19,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 19:50:19,568 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 19:50:19,570 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 19:50:19,571 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-02 19:50:19,571 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 19:50:19,578 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-02 19:50:19,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-02 19:50:19,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-02 19:50:19,597 INFO L87 Difference]: Start difference. First operand 292 states. Second operand 4 states. [2019-10-02 19:50:21,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 19:50:21,959 INFO L93 Difference]: Finished difference Result 689 states and 928 transitions. [2019-10-02 19:50:21,959 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-02 19:50:21,961 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 32 [2019-10-02 19:50:21,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 19:50:21,986 INFO L225 Difference]: With dead ends: 689 [2019-10-02 19:50:21,986 INFO L226 Difference]: Without dead ends: 616 [2019-10-02 19:50:21,988 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 19:50:22,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 616 states. [2019-10-02 19:50:22,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 616 to 422. [2019-10-02 19:50:22,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 422 states. [2019-10-02 19:50:22,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 422 states to 422 states and 607 transitions. [2019-10-02 19:50:22,068 INFO L78 Accepts]: Start accepts. Automaton has 422 states and 607 transitions. Word has length 32 [2019-10-02 19:50:22,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 19:50:22,069 INFO L475 AbstractCegarLoop]: Abstraction has 422 states and 607 transitions. [2019-10-02 19:50:22,069 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-02 19:50:22,069 INFO L276 IsEmpty]: Start isEmpty. Operand 422 states and 607 transitions. [2019-10-02 19:50:22,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2019-10-02 19:50:22,074 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 19:50:22,074 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:50:22,075 INFO L418 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 19:50:22,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 19:50:22,075 INFO L82 PathProgramCache]: Analyzing trace with hash 201462154, now seen corresponding path program 1 times [2019-10-02 19:50:22,075 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 19:50:22,077 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 19:50:22,077 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 19:50:22,077 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 19:50:22,078 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 19:50:22,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 19:50:22,302 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 19:50:22,303 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 19:50:22,303 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-02 19:50:22,303 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 19:50:22,305 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-02 19:50:22,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-02 19:50:22,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-02 19:50:22,306 INFO L87 Difference]: Start difference. First operand 422 states and 607 transitions. Second operand 6 states. [2019-10-02 19:50:23,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 19:50:23,993 INFO L93 Difference]: Finished difference Result 825 states and 1184 transitions. [2019-10-02 19:50:23,994 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-02 19:50:23,994 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 104 [2019-10-02 19:50:23,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 19:50:24,033 INFO L225 Difference]: With dead ends: 825 [2019-10-02 19:50:24,034 INFO L226 Difference]: Without dead ends: 825 [2019-10-02 19:50:24,035 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 19:50:24,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 825 states. [2019-10-02 19:50:24,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 825 to 814. [2019-10-02 19:50:24,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 814 states. [2019-10-02 19:50:24,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 814 states to 814 states and 1163 transitions. [2019-10-02 19:50:24,085 INFO L78 Accepts]: Start accepts. Automaton has 814 states and 1163 transitions. Word has length 104 [2019-10-02 19:50:24,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 19:50:24,086 INFO L475 AbstractCegarLoop]: Abstraction has 814 states and 1163 transitions. [2019-10-02 19:50:24,086 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-02 19:50:24,086 INFO L276 IsEmpty]: Start isEmpty. Operand 814 states and 1163 transitions. [2019-10-02 19:50:24,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2019-10-02 19:50:24,094 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 19:50:24,094 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:50:24,095 INFO L418 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 19:50:24,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 19:50:24,096 INFO L82 PathProgramCache]: Analyzing trace with hash -1596761827, now seen corresponding path program 1 times [2019-10-02 19:50:24,097 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 19:50:24,098 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 19:50:24,098 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 19:50:24,099 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 19:50:24,099 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 19:50:24,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 19:50:24,387 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 19:50:24,388 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-02 19:50:24,389 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-10-02 19:50:24,390 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 106 with the following transitions: [2019-10-02 19:50:24,392 INFO L207 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [165], [167], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [510], [1084], [1088], [1097], [1101], [1103], [1108], [1109], [1110], [1112], [1113] [2019-10-02 19:50:24,472 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-02 19:50:24,472 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-02 19:50:50,578 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-10-02 19:50:50,580 INFO L272 AbstractInterpreter]: Visited 77 different actions 77 times. Never merged. Never widened. Performed 203 root evaluator evaluations with a maximum evaluation depth of 16. Performed 203 inverse root evaluator evaluations with a maximum inverse evaluation depth of 16. Never found a fixpoint. Largest state had 28 variables. [2019-10-02 19:50:50,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 19:50:50,584 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-10-02 19:51:12,037 INFO L227 lantSequenceWeakener]: Weakened 91 states. On average, predicates are now at 73.94% of their original sizes. [2019-10-02 19:51:12,038 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-10-02 19:51:12,123 INFO L420 sIntCurrentIteration]: We unified 104 AI predicates to 104 [2019-10-02 19:51:12,123 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-10-02 19:51:12,124 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-02 19:51:12,124 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [10] imperfect sequences [7] total 15 [2019-10-02 19:51:12,124 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 19:51:12,125 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-02 19:51:12,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-02 19:51:12,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2019-10-02 19:51:12,126 INFO L87 Difference]: Start difference. First operand 814 states and 1163 transitions. Second operand 10 states. [2019-10-02 20:03:54,280 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation.