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/Problem14_label34.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-09 18:22:19,853 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-09 18:22:19,855 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-09 18:22:19,867 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-09-09 18:22:19,903 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/svcomp-Reach-32bit-Automizer_Default+AIv2_INT.epf [2019-09-09 18:22:19,932 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-09 18:22:19,932 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-09 18:22:19,932 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-09 18:22:19,933 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-09 18:22:19,934 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-09 18:22:19,935 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-09 18:22:19,935 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-09 18:22:19,935 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-09 18:22:19,935 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-09 18:22:19,935 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-09 18:22:19,936 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-09 18:22:19,936 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-09 18:22:19,936 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-09 18:22:19,937 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-09 18:22:19,937 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-09 18:22:19,937 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-09 18:22:19,939 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-09 18:22:19,939 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-09 18:22:19,939 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-09 18:22:19,940 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-09 18:22:19,940 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-09 18:22:19,940 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-09 18:22:19,940 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-09 18:22:19,940 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-09 18:22:19,941 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-09 18:22:19,941 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-09 18:22:19,941 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-09 18:22:19,941 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-09 18:22:19,941 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-09 18:22:19,941 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-09 18:22:19,998 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-09 18:22:20,018 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-09 18:22:20,023 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-09 18:22:20,025 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-09 18:22:20,026 INFO L275 PluginConnector]: CDTParser initialized [2019-09-09 18:22:20,027 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label34.c [2019-09-09 18:22:20,088 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a4eceeaf0/49b9fadb4ed34cea9462518dc853ddc8/FLAG89ba157f5 [2019-09-09 18:22:20,642 INFO L306 CDTParser]: Found 1 translation units. [2019-09-09 18:22:20,643 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem14_label34.c [2019-09-09 18:22:20,661 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a4eceeaf0/49b9fadb4ed34cea9462518dc853ddc8/FLAG89ba157f5 [2019-09-09 18:22:20,906 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a4eceeaf0/49b9fadb4ed34cea9462518dc853ddc8 [2019-09-09 18:22:20,915 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-09 18:22:20,916 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-09 18:22:20,917 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-09 18:22:20,917 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-09 18:22:20,921 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-09 18:22:20,921 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 06:22:20" (1/1) ... [2019-09-09 18:22:20,924 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@57728f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:22:20, skipping insertion in model container [2019-09-09 18:22:20,925 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 06:22:20" (1/1) ... [2019-09-09 18:22:20,932 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-09 18:22:21,006 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-09 18:22:21,737 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 18:22:21,742 INFO L188 MainTranslator]: Completed pre-run [2019-09-09 18:22:21,868 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 18:22:21,885 INFO L192 MainTranslator]: Completed translation [2019-09-09 18:22:21,886 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:22:21 WrapperNode [2019-09-09 18:22:21,886 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-09 18:22:21,887 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-09 18:22:21,887 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-09 18:22:21,887 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-09 18:22:21,903 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:22:21" (1/1) ... [2019-09-09 18:22:21,903 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:22:21" (1/1) ... [2019-09-09 18:22:21,941 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:22:21" (1/1) ... [2019-09-09 18:22:21,941 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:22:21" (1/1) ... [2019-09-09 18:22:21,999 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:22:21" (1/1) ... [2019-09-09 18:22:22,019 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:22:21" (1/1) ... [2019-09-09 18:22:22,033 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:22:21" (1/1) ... [2019-09-09 18:22:22,048 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-09 18:22:22,049 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-09 18:22:22,049 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-09 18:22:22,049 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-09 18:22:22,052 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:22:21" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-09 18:22:22,119 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-09 18:22:22,119 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-09 18:22:22,119 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-09-09 18:22:22,120 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-09 18:22:22,120 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-09-09 18:22:22,120 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-09 18:22:22,120 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-09 18:22:22,120 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-09-09 18:22:22,120 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-09 18:22:22,121 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-09 18:22:22,121 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-09 18:22:23,607 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-09 18:22:23,608 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-09 18:22:23,609 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 06:22:23 BoogieIcfgContainer [2019-09-09 18:22:23,609 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-09 18:22:23,610 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-09 18:22:23,611 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-09 18:22:23,613 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-09 18:22:23,614 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.09 06:22:20" (1/3) ... [2019-09-09 18:22:23,615 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5dce4949 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 06:22:23, skipping insertion in model container [2019-09-09 18:22:23,615 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:22:21" (2/3) ... [2019-09-09 18:22:23,615 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5dce4949 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 06:22:23, skipping insertion in model container [2019-09-09 18:22:23,615 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 06:22:23" (3/3) ... [2019-09-09 18:22:23,617 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem14_label34.c [2019-09-09 18:22:23,627 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-09 18:22:23,638 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-09 18:22:23,655 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-09 18:22:23,684 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-09 18:22:23,685 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-09 18:22:23,685 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-09 18:22:23,685 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-09 18:22:23,685 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-09 18:22:23,686 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-09 18:22:23,686 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-09 18:22:23,686 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-09 18:22:23,708 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states. [2019-09-09 18:22:23,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-09-09 18:22:23,718 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 18:22:23,719 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-09 18:22:23,721 INFO L418 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 18:22:23,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 18:22:23,726 INFO L82 PathProgramCache]: Analyzing trace with hash 1994785786, now seen corresponding path program 1 times [2019-09-09 18:22:23,728 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 18:22:23,769 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:22:23,769 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 18:22:23,769 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:22:23,769 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 18:22:23,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 18:22:23,961 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 18:22:23,963 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 18:22:23,964 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-09-09 18:22:23,964 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 18:22:23,970 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-09 18:22:23,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-09 18:22:23,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-09 18:22:23,988 INFO L87 Difference]: Start difference. First operand 254 states. Second operand 4 states. [2019-09-09 18:22:25,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 18:22:25,971 INFO L93 Difference]: Finished difference Result 642 states and 940 transitions. [2019-09-09 18:22:25,971 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-09 18:22:25,973 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 33 [2019-09-09 18:22:25,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 18:22:25,996 INFO L225 Difference]: With dead ends: 642 [2019-09-09 18:22:25,996 INFO L226 Difference]: Without dead ends: 554 [2019-09-09 18:22:25,998 INFO L628 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 [2019-09-09 18:22:26,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2019-09-09 18:22:26,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 554. [2019-09-09 18:22:26,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 554 states. [2019-09-09 18:22:26,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 554 states to 554 states and 806 transitions. [2019-09-09 18:22:26,084 INFO L78 Accepts]: Start accepts. Automaton has 554 states and 806 transitions. Word has length 33 [2019-09-09 18:22:26,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 18:22:26,085 INFO L475 AbstractCegarLoop]: Abstraction has 554 states and 806 transitions. [2019-09-09 18:22:26,085 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-09 18:22:26,085 INFO L276 IsEmpty]: Start isEmpty. Operand 554 states and 806 transitions. [2019-09-09 18:22:26,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2019-09-09 18:22:26,093 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 18:22:26,093 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-09 18:22:26,094 INFO L418 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 18:22:26,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 18:22:26,094 INFO L82 PathProgramCache]: Analyzing trace with hash 2055899306, now seen corresponding path program 1 times [2019-09-09 18:22:26,095 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 18:22:26,096 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:22:26,096 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 18:22:26,096 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:22:26,096 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 18:22:26,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 18:22:26,381 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 18:22:26,381 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 18:22:26,382 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-09-09 18:22:26,382 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 18:22:26,385 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-09 18:22:26,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-09 18:22:26,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-09 18:22:26,386 INFO L87 Difference]: Start difference. First operand 554 states and 806 transitions. Second operand 4 states. [2019-09-09 18:22:27,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 18:22:27,984 INFO L93 Difference]: Finished difference Result 1464 states and 2100 transitions. [2019-09-09 18:22:27,990 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-09 18:22:27,990 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 145 [2019-09-09 18:22:27,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 18:22:28,005 INFO L225 Difference]: With dead ends: 1464 [2019-09-09 18:22:28,006 INFO L226 Difference]: Without dead ends: 1464 [2019-09-09 18:22:28,007 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-09 18:22:28,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1464 states. [2019-09-09 18:22:28,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1464 to 1282. [2019-09-09 18:22:28,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1282 states. [2019-09-09 18:22:28,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1282 states to 1282 states and 1809 transitions. [2019-09-09 18:22:28,078 INFO L78 Accepts]: Start accepts. Automaton has 1282 states and 1809 transitions. Word has length 145 [2019-09-09 18:22:28,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 18:22:28,080 INFO L475 AbstractCegarLoop]: Abstraction has 1282 states and 1809 transitions. [2019-09-09 18:22:28,080 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-09 18:22:28,080 INFO L276 IsEmpty]: Start isEmpty. Operand 1282 states and 1809 transitions. [2019-09-09 18:22:28,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2019-09-09 18:22:28,091 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 18:22:28,092 INFO L399 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-09 18:22:28,092 INFO L418 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 18:22:28,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 18:22:28,093 INFO L82 PathProgramCache]: Analyzing trace with hash -596158951, now seen corresponding path program 1 times [2019-09-09 18:22:28,093 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 18:22:28,094 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:22:28,094 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 18:22:28,095 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:22:28,095 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 18:22:28,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 18:22:28,430 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 133 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 18:22:28,433 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 18:22:28,433 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-09 18:22:28,437 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 259 with the following transitions: [2019-09-09 18:22:28,441 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], [169], [173], [175], [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], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [550], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [655], [659], [663], [667], [671], [675], [679], [683], [687], [691], [695], [699], [703], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [755], [759], [763], [767], [771], [775], [779], [783], [786], [948], [952], [961], [965], [967], [972], [973], [974], [976], [977] [2019-09-09 18:22:28,501 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-09 18:22:28,501 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-09 18:22:44,220 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-09 18:22:44,222 INFO L272 AbstractInterpreter]: Visited 147 different actions 147 times. Never merged. Never widened. Performed 333 root evaluator evaluations with a maximum evaluation depth of 14. Performed 333 inverse root evaluator evaluations with a maximum inverse evaluation depth of 14. Never found a fixpoint. Largest state had 24 variables. [2019-09-09 18:22:44,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 18:22:44,227 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-09 18:22:56,180 INFO L227 lantSequenceWeakener]: Weakened 239 states. On average, predicates are now at 77.68% of their original sizes. [2019-09-09 18:22:56,180 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-09 18:22:56,279 INFO L420 sIntCurrentIteration]: We unified 257 AI predicates to 257 [2019-09-09 18:22:56,280 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-09 18:22:56,286 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-09 18:22:56,287 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [11] imperfect sequences [6] total 15 [2019-09-09 18:22:56,287 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 18:22:56,288 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-09-09 18:22:56,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-09-09 18:22:56,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2019-09-09 18:22:56,292 INFO L87 Difference]: Start difference. First operand 1282 states and 1809 transitions. Second operand 11 states. [2019-09-09 18:24:23,695 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-09-09 18:26:08,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 18:26:08,662 INFO L93 Difference]: Finished difference Result 1468 states and 2004 transitions. [2019-09-09 18:26:08,662 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-09-09 18:26:08,663 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 258 [2019-09-09 18:26:08,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 18:26:08,671 INFO L225 Difference]: With dead ends: 1468 [2019-09-09 18:26:08,672 INFO L226 Difference]: Without dead ends: 1468 [2019-09-09 18:26:08,672 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 248 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2019-09-09 18:26:08,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1468 states. [2019-09-09 18:26:08,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1468 to 1464. [2019-09-09 18:26:08,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1464 states. [2019-09-09 18:26:08,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1464 states to 1464 states and 1998 transitions. [2019-09-09 18:26:08,711 INFO L78 Accepts]: Start accepts. Automaton has 1464 states and 1998 transitions. Word has length 258 [2019-09-09 18:26:08,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 18:26:08,712 INFO L475 AbstractCegarLoop]: Abstraction has 1464 states and 1998 transitions. [2019-09-09 18:26:08,712 INFO L476 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-09-09 18:26:08,712 INFO L276 IsEmpty]: Start isEmpty. Operand 1464 states and 1998 transitions. [2019-09-09 18:26:08,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 343 [2019-09-09 18:26:08,720 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 18:26:08,720 INFO L399 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-09 18:26:08,721 INFO L418 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 18:26:08,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 18:26:08,721 INFO L82 PathProgramCache]: Analyzing trace with hash -898720543, now seen corresponding path program 1 times [2019-09-09 18:26:08,721 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 18:26:08,722 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:26:08,723 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 18:26:08,723 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:26:08,723 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 18:26:08,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 18:26:09,434 INFO L134 CoverageAnalysis]: Checked inductivity of 328 backedges. 163 proven. 161 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-09-09 18:26:09,435 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 18:26:09,435 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-09 18:26:09,435 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 343 with the following transitions: [2019-09-09 18:26:09,436 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], [169], [173], [175], [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], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [550], [551], [554], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [655], [659], [663], [667], [671], [675], [679], [683], [687], [691], [695], [699], [703], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [755], [759], [763], [767], [771], [775], [779], [783], [786], [948], [952], [961], [965], [967], [972], [973], [974], [976], [977] [2019-09-09 18:26:09,444 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-09 18:26:09,444 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-09 18:26:31,274 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-09 18:26:31,276 INFO L272 AbstractInterpreter]: Visited 151 different actions 297 times. Merged at 4 different actions 5 times. Never widened. Performed 575 root evaluator evaluations with a maximum evaluation depth of 14. Performed 575 inverse root evaluator evaluations with a maximum inverse evaluation depth of 14. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2019-09-09 18:26:31,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 18:26:31,277 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-09 18:26:37,461 INFO L227 lantSequenceWeakener]: Weakened 339 states. On average, predicates are now at 77.49% of their original sizes. [2019-09-09 18:26:37,462 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-09 18:26:37,544 INFO L420 sIntCurrentIteration]: We unified 341 AI predicates to 341 [2019-09-09 18:26:37,545 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-09 18:26:37,545 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-09 18:26:37,545 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [11] imperfect sequences [12] total 21 [2019-09-09 18:26:37,545 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 18:26:37,548 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-09-09 18:26:37,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-09-09 18:26:37,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2019-09-09 18:26:37,549 INFO L87 Difference]: Start difference. First operand 1464 states and 1998 transitions. Second operand 11 states. [2019-09-09 18:27:09,496 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-09-09 18:27:36,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 18:27:36,604 INFO L93 Difference]: Finished difference Result 1680 states and 2225 transitions. [2019-09-09 18:27:36,604 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-09-09 18:27:36,604 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 342 [2019-09-09 18:27:36,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 18:27:36,616 INFO L225 Difference]: With dead ends: 1680 [2019-09-09 18:27:36,616 INFO L226 Difference]: Without dead ends: 1680 [2019-09-09 18:27:36,618 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 348 GetRequests, 332 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2019-09-09 18:27:36,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1680 states. [2019-09-09 18:27:36,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1680 to 1464. [2019-09-09 18:27:36,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1464 states. [2019-09-09 18:27:36,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1464 states to 1464 states and 1998 transitions. [2019-09-09 18:27:36,665 INFO L78 Accepts]: Start accepts. Automaton has 1464 states and 1998 transitions. Word has length 342 [2019-09-09 18:27:36,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 18:27:36,667 INFO L475 AbstractCegarLoop]: Abstraction has 1464 states and 1998 transitions. [2019-09-09 18:27:36,667 INFO L476 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-09-09 18:27:36,667 INFO L276 IsEmpty]: Start isEmpty. Operand 1464 states and 1998 transitions. [2019-09-09 18:27:36,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 369 [2019-09-09 18:27:36,674 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 18:27:36,675 INFO L399 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-09 18:27:36,675 INFO L418 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 18:27:36,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 18:27:36,676 INFO L82 PathProgramCache]: Analyzing trace with hash 159108045, now seen corresponding path program 1 times [2019-09-09 18:27:36,676 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 18:27:36,679 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:27:36,680 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 18:27:36,680 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:27:36,680 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 18:27:36,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 18:27:37,096 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 135 proven. 166 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2019-09-09 18:27:37,097 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 18:27:37,097 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-09 18:27:37,097 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 369 with the following transitions: [2019-09-09 18:27:37,097 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], [169], [173], [175], [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], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [550], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [655], [658], [659], [663], [667], [671], [675], [679], [683], [687], [691], [695], [699], [703], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [755], [759], [763], [767], [771], [775], [779], [783], [786], [948], [952], [961], [965], [967], [972], [973], [974], [976], [977] [2019-09-09 18:27:37,102 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-09 18:27:37,102 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-09 18:28:03,850 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-09 18:28:03,850 INFO L272 AbstractInterpreter]: Visited 151 different actions 297 times. Merged at 4 different actions 5 times. Never widened. Performed 685 root evaluator evaluations with a maximum evaluation depth of 14. Performed 685 inverse root evaluator evaluations with a maximum inverse evaluation depth of 14. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2019-09-09 18:28:03,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 18:28:03,851 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-09 18:28:19,675 INFO L227 lantSequenceWeakener]: Weakened 365 states. On average, predicates are now at 77.47% of their original sizes. [2019-09-09 18:28:19,676 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-09 18:28:19,780 INFO L420 sIntCurrentIteration]: We unified 367 AI predicates to 367 [2019-09-09 18:28:19,781 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-09 18:28:19,781 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-09 18:28:19,781 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [12] imperfect sequences [8] total 18 [2019-09-09 18:28:19,781 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 18:28:19,782 INFO L454 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-09-09 18:28:19,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-09-09 18:28:19,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2019-09-09 18:28:19,783 INFO L87 Difference]: Start difference. First operand 1464 states and 1998 transitions. Second operand 12 states. [2019-09-09 18:29:11,877 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-09-09 18:32:13,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 18:32:13,001 INFO L93 Difference]: Finished difference Result 1832 states and 2388 transitions. [2019-09-09 18:32:13,001 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-09-09 18:32:13,001 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 368 [2019-09-09 18:32:13,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 18:32:13,010 INFO L225 Difference]: With dead ends: 1832 [2019-09-09 18:32:13,010 INFO L226 Difference]: Without dead ends: 1832 [2019-09-09 18:32:13,011 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 376 GetRequests, 357 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=101, Invalid=319, Unknown=0, NotChecked=0, Total=420 [2019-09-09 18:32:13,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1832 states. [2019-09-09 18:32:13,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1832 to 1830. [2019-09-09 18:32:13,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1830 states. [2019-09-09 18:32:13,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1830 states to 1830 states and 2386 transitions. [2019-09-09 18:32:13,049 INFO L78 Accepts]: Start accepts. Automaton has 1830 states and 2386 transitions. Word has length 368 [2019-09-09 18:32:13,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 18:32:13,050 INFO L475 AbstractCegarLoop]: Abstraction has 1830 states and 2386 transitions. [2019-09-09 18:32:13,050 INFO L476 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-09-09 18:32:13,050 INFO L276 IsEmpty]: Start isEmpty. Operand 1830 states and 2386 transitions. [2019-09-09 18:32:13,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 395 [2019-09-09 18:32:13,059 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 18:32:13,059 INFO L399 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2019-09-09 18:32:13,059 INFO L418 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 18:32:13,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 18:32:13,060 INFO L82 PathProgramCache]: Analyzing trace with hash 839401761, now seen corresponding path program 1 times [2019-09-09 18:32:13,060 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 18:32:13,061 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:32:13,061 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 18:32:13,061 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:32:13,062 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 18:32:13,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 18:32:13,398 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 214 proven. 124 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2019-09-09 18:32:13,398 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 18:32:13,398 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-09 18:32:13,399 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 395 with the following transitions: [2019-09-09 18:32:13,399 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], [169], [173], [175], [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], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [654], [655], [658], [659], [663], [667], [671], [675], [679], [683], [687], [691], [695], [699], [703], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [755], [759], [763], [767], [771], [775], [779], [783], [786], [948], [952], [961], [965], [967], [972], [973], [974], [976], [977] [2019-09-09 18:32:13,403 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-09 18:32:13,403 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-09 18:32:32,374 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-09-09 18:33:08,347 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-09 18:33:08,347 INFO L272 AbstractInterpreter]: Visited 151 different actions 591 times. Merged at 6 different actions 17 times. Never widened. Performed 1050 root evaluator evaluations with a maximum evaluation depth of 22. Performed 1050 inverse root evaluator evaluations with a maximum inverse evaluation depth of 22. Found 4 fixpoints after 1 different actions. Largest state had 24 variables. [2019-09-09 18:33:08,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 18:33:08,348 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-09 18:33:21,278 INFO L227 lantSequenceWeakener]: Weakened 391 states. On average, predicates are now at 77.46% of their original sizes. [2019-09-09 18:33:21,279 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-09 18:33:21,340 INFO L420 sIntCurrentIteration]: We unified 393 AI predicates to 393 [2019-09-09 18:33:21,340 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-09 18:33:21,340 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-09 18:33:21,340 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [10] imperfect sequences [7] total 15 [2019-09-09 18:33:21,340 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 18:33:21,341 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-09-09 18:33:21,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-09-09 18:33:21,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2019-09-09 18:33:21,342 INFO L87 Difference]: Start difference. First operand 1830 states and 2386 transitions. Second operand 10 states.